I hope you guys enjoyed this video. If you want to learn even more, I hope you'll consider checking out my Amazon #1 Bestselling book, DIY Lithium Batteries, available in paperback and ebook formats. a.co/iDtWdPX
Thanks for your informative videos I just bought a SM8124A internal resistance meter. Many used 18650 cells read around 30 some around 100 or more and the levels seem stable. Many read a rapidly changing reading between 25 and 60 can you give us a video explaining proper expected readings.
Friendly advice: Don't do it 4-5 times in a row. Check that video with thermal camera and comparison of spot welding and soldering. Even if you spot weld it gets some heat into the battery. It is better to spot weld once and then move to the next tab and do it in circles. This will give the battery chance to cool down a little bit.
the whole point of a spotwelder is that it stops the cell from even heating up in the first place, id only do what you said if I was soldering cells together
nah, I worked in a factory spot welding on these exact cells for four years straight in college. You just work on one cell and move one, never in four years was there a problem due to what you're describing. Few small issues were when the strap touched or welded in the wrong spot...keep a bucket of sand near by and a fire suppressant.
Really really really great video. Calm, clear voice with no annoying pretend excitement. I might retire in S. America and, while I love my Haibike MTB, Bosch ebike systems aren't serviced there - I believe. Now I'm confident I can convert a bike to electric and service it myself. Thanks!
Hi, good content. I used to work for a company who manufactured battery Pack a good way to make sure the solder stays on nikel plate is to scratch it (nickel plate) with a blade, it helps solder stick better.
Micah, nice to find someone that can speak calmly, logicaly, without screaming or music fading in and out,,, you can even smile,, very refreshing. Perhaps you would be kind enough to give me a rough idea as to how many 18650's I could get into a box with internal dimentions of 290mm x 145mm x 68mm I am only intrested in absolute max number of cells you "think" I might possibly fit in to that space. Ray
Alex McRae The phrase "would have been" is proper grammar. The phrase "would of been" is not. It is common for people to confuse "would've", which is a contraction for "would have" for "would of", which is grammatically incorrect.
dude. LOVE THIS! thank you so much. I want to build a custom electric scooter because everything on the market right now just isn't fast enough for what I want
I'm so glad someone is actually taking the time to figure the wiring on these ebike,because being that most ebikes are made in China,a lot of them don't have wiring diagrams
Power = Voltage x Current W = 3.7V x 20A W = 74 Energy = Voltage x Current x time W time = V x I x time W hour = 3.7V x [3000 mAh] W hour = 3.7V x 3 Ah Wh = 11.1 That simple. And for reference, 1000 Wh = 1 kWh [1 Electrical Unit], which is what our kWh energy meter uses in home ________________________________ mAh and Ah which are seriously flawed unit (which doesn't take voltage into account), which is normally used by manufacturers and marketers to misguide people !! Professional and universal unit for energy are, kWh or Wh. I mean, these all of us use kWh meter in home, kWh in Tesla car, and 1000 Wh = 1 kWh. (how else simple do you want ??) Still people use mAh and Ah, wonder how lame can they get !!! And for comparison (different rechargeable battery types): AAA [NiMH] = 1 Wh AA [NiMH] = 2.5 Wh AA [Li ion] = 3 Wh C [NiMH] = 5 Wh D [NiMH] = 10 Wh 18650 [Li ion] = 8 to 13 Wh (high drain to high capacity) 26650 [Li ion] = 14 to 18 Wh ______________________________ Average energy of Tesla battery are around 11 Wh [18650], and to make a Tesla P100D [100 kWh] Model S, = 100 kWh / 11 Wh = 100, 000 Wh / 11 Wh = 9091 batteries or in simple words, 9091 [18650 battery] x 11 Wh = 100,000 Wh = 100 kWh. ______________________________ So i would seriously recommend 18650 enthusiasts to use Wh and kWh [our universal unit] instead of flawed mAh and Ah which are way too childish unit for energy !!
DYNAMO TAPE! I remember that. Xmas gift for waking parents at 5.30am click click click!! SO glad you posted this, thanks. Got my bottle battery case,.. arrived with wires cut clean through and no BMS board courtesy of a less than honest Ebayer...but I can now still use it, I hope : )
Thank for an excellent video, this is the best battery build video I have seen yet, was building an electric bike using two bosch 36v three phase motors unfortunately it was fried when my garage went up in flames so will be starting again in a short while, regards Doc Cox
You are a very good teacher. Are you a left hander? I am and I've noticed that left-handers enjoy teaching,,, helping someone learn what was taught to us. Very satisfying. I subbed! And the spot welder was cool! I never seen that type. Didn't know it existed. I worked in a machine shop as a Sheet Metal Fabricator and we had a spot welder from the 40s. It was 6 ft tall and had a clumsy foot switch and that old green color just like the lathes. I'm 60 now and enjoy seeing new tools too. Amazing!
Just a suggestion to look into using 21700 cells instead of 18650 cells. You get a lot more potential for higher capacity in almost the same physical space...just an increase of 3mm Diameter and 5mm Length for *almost* 50% additional capacity. Put another way, a 21700 cell stores almost as much energy as 1.5 18650 cells of similar construction. Plus, the 18650 cells can have a lower lifetime than the same capacity 21700 cell due to increased stress on the 18650 cell when talking about very high capacity cells. Using 21700 cells may also let you go to fewer batteries in parallel for the same performance. For example, you may be able to use 3p12s instead of a 4p12s configuration. In the 12s configuration that eliminates 12 cells right there for actually a slight increase in mAh capacity. So differences in cost between similar quality 21700 and 18650 cells may become a non-issue in a given application.
I have a new 48V 1000W rear hub on my dual suspension which has been waiting for the battery. I have around 300+ new cells @2600mah each of which I plan to build 4x29V battery packs. Connecting 2 packs in series to get my voltage (58.8V extra boost) & then the other 2. & then connect those in parallel to get 52Ah for my range. Each pack consists of 10P/7S. I'll add balance leads & cell loggers to the packs so i can physically see whats happening as i don't trust bms. The bike will also have foldable solar panels with charge controllers as i'll be doing a lot of outside stuff. & i'll be uploading videos along the way. thanks again for your tutorials! :)
Another "great, informative and easy to understand Video" Thanks 😊👍🏼👌🏻 Used a few techniques I learnt from you from your Various "How To" Videos to build my own E-Bike (Mid Drive) & Battery Packs (15S /10P out of Sanyo18650GA Cells) for a Enduro E-Bike BBSHD Build
Thank you so much. This is the BEST and well explained video for a person like me that has only some light knowledge of electricity. I want to build a light kit for my bike to help me commute to my work without getting there with no sweat..... THANK YOU!!! Subscribed
Nicely done. Lots of useful detail from someone who's clearly done plenty of battery building before. I've been meaning to get a battery welder for a while now. Any particular reason to pick the 787A versus other hardware?
With all that insulation & shrink wrap, is there ever a problem with heat management of the cells? Will the cells heat up with fast discharge of fast charge? And how many charge cycles might you get. Excellent video! Thanks for posting.
To get the best results: as not all cells are created equally & there is likely always small differences in the top village they reach, you should measure a bunch and try to line them up in two rows (in this case) of seven in such a way that both the two rows will show about the same Voltage and then ONLY connect the two rows at the outer polarities (as opposed to, connecting them in pairs of two's all the way). It will minimale the indecency inbetween doubles and on, wherein unequal pairs and so on will drain percents of each other (and be probably only less than 70% efficient in that) from the highest to the lowest of each pair in order to them trying to keep evening out. Connecting two rows of seven apart from each other that way and only doubling up at front and end may save you a few percents of loss after charging.
Great vid. I used nickle rollers with thin slice of wood dowel glued in the ends. White wool for bus bars, red wool for positive, black for neg and blue for jumpers. Made it easier for me anyway because it's 3d.. 😅😅 ps. I build circuit boards from scratch (board diagram from schematic, etching, drilling, placing, soldering etc, etc..) so no stranger to electronics. I have never built a battery pack tho and It took a couple months of research before I felt comfortable even mocking one up. I learned the nature of lithium cells and how to not burn your house down.. and In the end I ended up buying one anyway because it turns out that my homeowners insurance won't cover me for fire if the "homemade" battery erupted into fire for whatever reason. I do feel tho that my battery would have been top shelf with minimal heating up. The bms I was looking at had settable parameters like shutting down charging at 80% with active balancing I would never need to charge them to thier full value. I did overkill on the parallel to series connections with each group's amp handling at 30, which is the max I would be pulling from the entire pack.
I've gotten tons of questions about where I got these materials. Everything can be found here: 18650 cells: goo.gl/tVjREI Nickel strip: goo.gl/VIrNQq Spot welder: goo.gl/cZS1yC BMS: goo.gl/S6gSQx Silicone wire: goo.gl/xmpbKD Black 18650 cell spacers: goo.gl/hQxWF6 Large heat shrink tubing: goo.gl/6v1ow9 Foam sheet for protecting battery: goo.gl/5e71tE
Hi will these batteries work, i'm not sure because they are a lot cheaper than the other ones on ebay. www.ebay.com.au/itm/Brand-Tikon-3-7V-Rechargeable-18650-Li-ion-Lithium-Battery-Cell-Fr-Flashlight-OZ-/331328395337?var=&hash=item4d24b61849:m:mrpIJrj1oWd5miqvwQUBOXA
Hi there , Great video I'm planning on building an Ebike and I was wondering if these are a decent battery www.alibaba.com/product-detail/Hot-sale-hight-quanlity-3-7V_60169974596.html?spm=a2700.7724838.0.0.mpG9Mi
Pancake - No, I'm sorry but these aren't so good for ebike use. They cheaper chinese cells and are of questionable quality. These work fine for flashlights, but aren't appropriate for high power devices like ebikes.
Richie, sorry I thought I had tagged that. I was referring to Pancakes. Now I see yours. Those look like either knock offs of Samsung 26F cells (perfectly good but low power cells) or they are genuine but the vendor doesn't have the rights to sell them so they aren't showing the label with cell info. If they are knock offs then they are only as good as the average cheap chinese cell (not very good). If they are genuine, then they are just fine but you'll need to use enough in parallel to cover your current needs since they are low power cells rated for max 5A draw each.
Hi Mike, Could you do a video about the various BMS's, (smart BMS vs regular etc) and tips about what to consider when searching for one, you know, kind of guidelines for selecting the best one suited to the battery we build? תודה מראש! 😉
Hey, first off just have to say I've found your video's really informative! Love how they're organized and they've really helped clear up things. Just have a quick question for you: If you're building a 12v battery from the panasonic 18650 cells. Would you recommend using 3 cells for 11.1V? or 4 cells for 14.8V? I know the maximum capacity is 4.2v (which would give you 12.6v for 3) but I'm thinking I should use 4 because that way I wouldn't discharge the batteries as far. (keeping them "healthier") Am I right by going this route?
Devices like radios connected to the battery in most vehicles experience a range of voltages. When the battery is charging the alternator maintains the system at about 14.5 volts. With the car off, the battery voltage is 12.6 (when full) At lower voltages, the current passing thru the connecting wires increases. Most devices perform better (cooler) at the higher ranges.
I wish you could explain why you have a backwards 1/4" phono plug and a negative wire soldered to the outside of it. I'm not familiar with this connector, but to me it looks like a music plug soldered backwards. Also I've done basic soldering and when you are soldering those wires from the BMS to the nickel strips you will notice it is beading off the strip like water droplets on glass. If you tug at those connections they should come off easy, you're supposed to either use fine sandpaper to rough up the surface or flux. any time I've seen solder look like it's beading off something and it looks like it's having a hard time sticking it means poor adhesion
Hi Bruce, what you are seeing is a property of solder known as "wetting", where the solder spreads out when it reaches a certain temperature and adheres to the nickel. It might be hard to see because I sped up the video during the soldering, but rest assured all of those joints were tested and are quite strong. Regarding the RCA plug, it's only a "music plug" if you've got music going through it. Otherwise it's a generic electrical connector. These are gold plated RCA connectors that can handle up to 5A. Other RCA connectors can carry up to 15A. The outside of the barrel on the mono end is negative and the tip of the barrel is positive. This correlates with a standard in the ebike industry for using the center of RCA connectors as positive.
Hi Mika. I have two of your books. I'm now ready to order my first batch iof 18650's can you point me in the direction of a supply of good quality 18650's please...
YOU NEVER SAY WHAT TO DO AS IN OPYTIONS IF TWO OE A FEW CELLS ARE BAD? YOUR CHANNEL IS EASILY ONE OF THEE MOST USEFUL ALL SCHOOL NO GYM CLASS THANKS LOOL
This vid i think was more on how the cells and bms are connected than technique. If you noticed those cells have marks from previous welds before he put the pack together
I’m in the middle of building my first battery and viewed your other video about testing the nickel strip to see if it’s plated steel, after putting a piece in salt water overnight it rusted. I have pure nickel welded to the top, .2x10mm strips, do I need to rip it apart to remove the plated steel and rebuild with pure nickel or will it be fine? It’s a high amp pack that could draw 25 amps per cell. 13s6p 21700 molicell 42a ( rated 45 amps per cell) 0:11
Please get yourself a good microphone and the lights that don't flicker. Turn off all the auto-settings on your camera, so the brightness doesn't go up and down, the color balance doesn't go from warm to cold (like at 1:00).
Ebike School has a video: DIY 52v 10.5ah lithium battery from a kit Before I noticed that one I saw this video (off to the right) from Rinoa super genius: DIY 52v (48v) 16AH Lithium ion 18650 ... It's so funny because I have a 29" bike I'm having a hard time finding ebike supplies for and just last night I noticed 29"/700c as if it's the same thing and then I saw 28"/700c. Gotta love it. Neobattery is the place to get the batteries from $5 in lots of 40 or 100, they're on eBay and probably have their own site.
TrustInJesus111 I have 18650 batteries that I took apart from old laptop batteries. I am not 100 percent sure how to make a 48 volt 10 amp hour pack. I have soldering stuff, and spot welder just don't understand the series and parallel yet and how to get 48 volts. Lol
This is the video I've been looking for. I'm looking to build my own e scooter. I'm thinking 60v 30a+. Expensive to buy so want to build my own battery for e scooter. Great video.
Hello Amazing creativity work , for 24V 15Ah battery pack , if you made this by 2600mah cells , for series , it will be 7 cells ; but for capacity , you will need 6 cells , 7*6 = 42 pcs , you need 42 cells in a pack .
I was going to ask a question, but apparently you aren't answering them. You only want people to go to your website to ask. Isn't it easier for us to ask here? Anyway, since you're not answering, nvm. Btw, what strikes me is that your using an expensive thing like a spot welder, but you're not using spacers to keep the batteries better ventilated.
great video, plz I have a question : It is safe to run Xiaomi scooter ( 250watt motor) with hoverboard 36v batterie ( 20 Samsung battery)? ?? plz I need your answer
Great Video. Thank you. O bouth an old wave 2.0 ebike from my friend but the battery does not work. He said it was something simple..but NO. The battery has 50 batteries. I understood how to do the one on your video, but 50 batteries I would be lost. Another thing. I do not have a Spot Welder. Is there a way to do it differently. I appreciate your help. Thank uou again
Really nice video! I have a MagicShine MJ868 lamp with no battery and would like to do one my self. Is this how i do it or should i use somthing else? The original battery is 4×18650 SAMSUNG Li-ion battery (7.4V 5.6AH)
hello! What should I change for an electric bicycle battery (36V 9Ah) that no longer charges at all? I specify that the charger is ok. Are the cells the problem or the BMS!? Thank you for your answer!
Great video.You must make a video about the motors. I would like to make a bike to go at 50km/h... most for the hills...but it is so many the motors in the market and I don't know exactly what is important when I compare two motors. First I choose the motor and upon this, I build my battery or the reverse?
So let me get this straight? On MOST lithium ion scooter packs there will be the output connection usually xt60 with thicker black and red wire and then a charging connection as well correct?
Just a thought with connecting your wires from the BMS you solder them on. Why don't you solder the wire on to nickel strip and spot weld them on to the battery?
Unfortunately no. Some people do solder their 18650 cells but this is bad practice. It not only damages them by overheating the cells, but it can be dangerous and lead to fire if you heat them too much. So you'll see some people do it, but it's definitely not advisable.
Very educational....I have a cruiser and I enjoy it but for quite a while I've been wanting to make it an e-bike....there is a bycycle shop in town and I am curious as to what their thoughts and input would be. I watch these folks go by on motorized or e-bikes bought by kit or the whole thing.
thank you so much for this video you have properly explained series and parallel and how to read wear each wire to the bms goes i will attempt to build a secondary battery for my escooter as the main battery is not very strong mine will roughly be double the size so 48-60V
Should i trust buying prebuilt battery packs from amazon? Looking into 72v 20-30ah batteries. Where do you recommend i shop for pre built batteries online? Preferably USA fast shipping
Hi there Thanks for your time for showing and explaining this important things of e-bicycle battery My question is what should I use to make the battery to last long distance driving..? Thanks for your time
If you mean long range then you just need more cells in parallel .This battery only has 2 cells in parallel because it is for short range. If you mean long lifetime, then try to charge the battery up to only 95% or so and not drain it all the way to empty. That can double the lifetime of the battery.
Im curious if the tranformer welder you yave with max of 800a is somehow better than my super capacitor 2400a welder. I can only change the ms of the weld time and nit the amos so the higher the ms the higer the amps theyre tied together. I was just curious Edit: nevermind i commented this same video 4+ years ago and never got an answer. Haha. I guess dont comment on old videos.
Turbo Bob I think you make the best videos for eBikes on the Tube, what I would like to do is build a 48v Samsung 18650 30Q from start to finish, using at least 52 batteries if that is possible, step by step, with a BMS. I am a little confused on how many batteries I will need, and how to select a BMS. I have automobile experience so it is not that new to me.
Hi, Your videos are strong and best! Plz want to know if i want to support 36v 350w hub motor with 36v 14A+- controller by 3.7v 2500mAh@3C (Hvvea 18650-25F) do I still apply 4 P & 10S, what BMS should I need? 20A?
I've been plugging the battery then the AC to the wall outlet and all the 120 v prongs are burnt like arc sparks . My charger doesn't fully charge anymore just for 2 to 3 minutes..Do you think the capacitors are faulty ? Thanks
hi Mike, i saw a guy using a battery as a spot welder, which is just two pieces of 2.5mm sq cable straight of the terminals and used as probes for the welder. it was nicely made, but no timeing. he just pushes up against the probes and then takes it off. the reason i talk about this is becuase i have just seen your video about thermal heat. thanks i already have the ebike book, but would love the battery pack book. thanks
Hi, thanks for all the training on preparation of battery, I have a 48v 13 ah battery need to convert it to 36v 13ah battery could u pls let me know the easiest way to do that, awaitinf for your prompt response and thanking you.in advance
I have to make 2 single rows of 12 flat battery pack for e longboard. I notice when you do your series you use 4 batteries, does that mean only 2 add up the voltage and the other 2 build up the mah because their parallel within a series?
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What do you think about using 26650 3.7V 5000mAh (5024mAh tested) cells in leu of 18650 cells in a ebike battery pack? Same voltage so 14 cells would deliver ~52V but the AH would be ~70ah vs ~18-20ah for the 18650? These seem to be the way to go, but just learning about batteries so maybe not. Thanks.
Interesting. Why you make this yourself ? They are better than standard available battery packs ? Do the commercial battery packs on a e-bike also have a BMS ? or will that bms be included in the controller ?
I've just spot welded a 7s 4p out of recycled laptop cells. I did it because I have an old electric scooter that used an old an heavy 24v battery, it has 250w motor. The old battery didn't have a BMS and it was charged using a circuit board that also controls the motor, I believe it has over discharge and overcharge protection. Can I use the battery I built without a BMS? This would be just for testing out if the scooter is still worth buying/building a new battery or I risk blowing up my feet?
I do not intend on doing this but curiosity is getting the better of me. Lets say 1 cell is knackered in parallel group that is dragging down the whole set, and you did not have a spare cell to replace. Is it safe to cut that dodgy cell out and throw it and not replace? I get that you would have a slightly smaller AH battery. But would this cause issues in terms of balancing or anything else?
I appreciate your videos. Im building a 36v battery i think 9p10s battery for my scooter. Im shooting for as much amps as possible. It is a 36v scooter with a 500watt motor. I see 36v 26ah batteries packs for sale on aliexpress with a charger for about $300, but I want to build my own for gaining experience. I already have a charger. I am most confused by what exact cells I should use to try to get the most amps. And where to buy. any thoughts appreciated.
Hi, im wondering why would you use 3 nickelstrip connections from the 3 parallel cells to the next for the serie connection? Is this also possible with one connection for possitive and negative?
Can you explain to me about the wire gauge used to solder the batteries..? Since you use nickel strip, how much current allowed to flow through the the strip..?
Hello Sir. Nice video, like your ebike school project. Have a question. I have cheap Sunkko welder. I am able to weld nickel strip to battery prety strong, but can not then weld nickel to nickel. It is very loose. Same when trying to weld two nickel strips without battery. When I added current I melted bottom strip. Anyway, dont you know what 4P, 6P, 8P means? I can combine it so I suppose 4P and 6P on will give me 10P. What setting you use usually. Thanks a lot.
I'm using a double pulse at with the welder set to 40. That's very odd about melting the lower nickel. I recommend trying to lower your current and see if that helps. Otherwise it might be a defect in your welder.
Best explanation about make custom batere, i'm newbie, my i ask? why we make custom batere? why wenot by new pack batere with same spesification at pabrican?
Dymo labeler reminds me of my grandmother's house... only the labels fell off after 30 years. lol. if you put it between the layers does the shrink rap get embossed? Thank you for a good quality video with concise detail. I like that you share your thinking process as well as the procedure. Great presentation skills too. Better than Cats!
HI I’ve been tasked by local eBike shop, to repair some BH eBike (Evo Easy Motion bikes) The batteries look OK all the cells and packs are fine but the BMS refuses to let the batteries charge or power the bike. You seem to have a lot of BMS experience. Could you recommend a unit I could buy on eBay to replace the original as we can’t get any spares ? Im assuming the BMS can be programed for the ebike battery setup & voltages ?
Hi, I have an e-bike which the battery was faulty and was not charging. I have disposed of the batteries however they were completely different to 18650 cells as these ones were 7 oblong cases with + - at the top of the each case measuring a 4.2v. the casung has a key oporating mechanism and fuse. The charging terminal is also different. Your video is brilliant and I was wondering if you could make a new video showing how to connect the battry you have thought us to build to the existing battery case. I know every bike's battery case is different but I would think the principle would be the same. Look forward to hearing from you.
Very informative video! I would strongly sugest to add some more safety proticals. Like wrapping the cells in fish paper aswell as the tops. Cut the nikel so theres no sharp edges because they can poke a hole in your shrinkwrap.
I have a mobility scooter that runs off two 12volt sealed lead acid batteries, if I wanted to change to 18650 battery packs how big do you think they would have to be?
If you are unsure of your electric motor's tolerance, you could use LiFePO4 18650s instead. 4 in series will give a nominal 12.8v. Same as a SLA battery.
I hope you guys enjoyed this video. If you want to learn even more, I hope you'll consider checking out my Amazon #1 Bestselling book, DIY Lithium Batteries, available in paperback and ebook formats. a.co/iDtWdPX
EbikeSchool.com can you just solder on the nickle to the batteries
If you hotglue your cells doesnt get cooled really good and instead tear apart if one battery is faulty.
Just think about that option.
You r the man......thank you so much
Thanks for your informative videos I just bought a SM8124A internal resistance meter. Many used 18650 cells read around 30 some around 100 or more and the levels seem stable. Many read a rapidly changing reading between 25 and 60 can you give us a video explaining proper expected readings.
EbikeSchool
Friendly advice: Don't do it 4-5 times in a row. Check that video with thermal camera and comparison of spot welding and soldering. Even if you spot weld it gets some heat into the battery. It is better to spot weld once and then move to the next tab and do it in circles. This will give the battery chance to cool down a little bit.
the whole point of a spotwelder is that it stops the cell from even heating up in the first place, id only do what you said if I was soldering cells together
@@themastereal8345but still need to melt nickel
And only till 60c heated cell but still I hope it's better to do like giving gap
nah, I worked in a factory spot welding on these exact cells for four years straight in college. You just work on one cell and move one, never in four years was there a problem due to what you're describing. Few small issues were when the strap touched or welded in the wrong spot...keep a bucket of sand near by and a fire suppressant.
Really really really great video. Calm, clear voice with no annoying pretend excitement. I might retire in S. America and, while I love my Haibike MTB, Bosch ebike systems aren't serviced there - I believe. Now I'm confident I can convert a bike to electric and service it myself. Thanks!
Hi, good content. I used to work for a company who manufactured battery Pack a good way to make sure the solder stays on nikel plate is to scratch it (nickel plate) with a blade, it helps solder stick better.
@@user-oe8xe4og6t hi, thank you. Where do I contact you?
I use a piece of sandpaper or a dremel
Micah, nice to find someone that can speak calmly, logicaly, without screaming or music fading in and out,,, you can even smile,, very refreshing. Perhaps you would be kind enough to give me a rough idea as to how many 18650's I could get into a box with internal dimentions of 290mm x 145mm x 68mm I am only intrested in absolute max number of cells you "think" I might possibly fit in to that space. Ray
Learned more from this video than from 11 years of school
where did you go to school
Went to a school where I learned that question end with a question mark. You didn't learn that.
+Tom Miller I grew up in Antarctica.
I didn't learn that in the Icelands.
Hi
Alex McRae The phrase "would have been" is proper grammar. The phrase "would of been" is not. It is common for people to confuse "would've", which is a contraction for "would have" for "would of", which is grammatically incorrect.
Be sure that you have a talent. You explain things in such a way that no questions arise. Everything is quite clear.
dude. LOVE THIS! thank you so much. I want to build a custom electric scooter because everything on the market right now just isn't fast enough for what I want
I'm so glad someone is actually taking the time to figure the wiring on these ebike,because being that most ebikes are made in China,a lot of them don't have wiring diagrams
Power = Voltage x Current
W = 3.7V x 20A
W = 74
Energy = Voltage x Current x time
W time = V x I x time
W hour = 3.7V x [3000 mAh]
W hour = 3.7V x 3 Ah
Wh = 11.1
That simple.
And for reference,
1000 Wh = 1 kWh [1 Electrical Unit],
which is what our kWh energy meter uses in home
________________________________
mAh and Ah which are seriously flawed unit (which doesn't take voltage into account),
which is normally used by manufacturers and marketers to misguide people !!
Professional and universal unit for energy are,
kWh or Wh.
I mean, these all of us use kWh meter in home, kWh in Tesla car,
and 1000 Wh = 1 kWh.
(how else simple do you want ??)
Still people use mAh and Ah, wonder how lame can they get !!!
And for comparison (different rechargeable battery types):
AAA [NiMH] = 1 Wh
AA [NiMH] = 2.5 Wh
AA [Li ion] = 3 Wh
C [NiMH] = 5 Wh
D [NiMH] = 10 Wh
18650 [Li ion] = 8 to 13 Wh (high drain to high capacity)
26650 [Li ion] = 14 to 18 Wh
______________________________
Average energy of Tesla battery are around 11 Wh [18650],
and to make a Tesla P100D [100 kWh] Model S,
= 100 kWh / 11 Wh
= 100, 000 Wh / 11 Wh
= 9091 batteries
or in simple words,
9091 [18650 battery] x 11 Wh = 100,000 Wh = 100 kWh.
______________________________
So i would seriously recommend 18650 enthusiasts to use Wh and kWh [our universal unit] instead of flawed mAh and Ah which are way too childish unit for energy !!
Chandraprakash G f*ck Google, next time I'll ask you haha
Thanks for the tip friend. I was searching for this
thanks for this
You are the MAN!!!
Thanks...
💪🏻🤓🤓🤓🤓🤓🤓🤓🤓🤓👍🏻
Thanks for your teachers research papers
DYNAMO TAPE! I remember that. Xmas gift for waking parents at 5.30am click click click!! SO glad you posted this, thanks. Got my bottle battery case,.. arrived with wires cut clean through and no BMS board courtesy of a less than honest Ebayer...but I can now still use it, I hope : )
Thank for an excellent video, this is the best battery build video I have seen yet, was building an electric bike using two bosch 36v three phase motors unfortunately it was fried when my garage went up in flames so will be starting again in a short while, regards Doc Cox
You are a very good teacher. Are you a left hander? I am and I've noticed that left-handers enjoy teaching,,, helping someone learn what was taught to us. Very satisfying.
I subbed! And the spot welder was cool! I never seen that type. Didn't know it existed. I worked in a machine shop as a Sheet Metal Fabricator and we had a spot welder from the 40s. It was 6 ft tall and had a clumsy foot switch and that old green color just like the lathes.
I'm 60 now and enjoy seeing new tools too. Amazing!
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Just a suggestion to look into using 21700 cells instead of 18650 cells. You get a lot more potential for higher capacity in almost the same physical space...just an increase of 3mm Diameter and 5mm Length for *almost* 50% additional capacity. Put another way, a 21700 cell stores almost as much energy as 1.5 18650 cells of similar construction.
Plus, the 18650 cells can have a lower lifetime than the same capacity 21700 cell due to increased stress on the 18650 cell when talking about very high capacity cells.
Using 21700 cells may also let you go to fewer batteries in parallel for the same performance. For example, you may be able to use 3p12s instead of a 4p12s configuration. In the 12s configuration that eliminates 12 cells right there for actually a slight increase in mAh capacity. So differences in cost between similar quality 21700 and 18650 cells may become a non-issue in a given application.
Thats rite
I have a new 48V 1000W rear hub on my dual
suspension which has been waiting for the battery. I have around 300+
new cells @2600mah each of which I plan to build 4x29V battery packs.
Connecting 2 packs in series to get my voltage (58.8V extra boost) &
then the other 2. & then connect those in parallel to get 52Ah for my range.
Each pack consists of 10P/7S. I'll add balance leads & cell
loggers to the packs so i can physically see whats happening as i don't
trust bms. The bike will also have foldable solar panels with charge controllers as i'll be doing a lot of outside stuff. & i'll be uploading videos along the way. thanks again for your tutorials! :)
Another "great, informative and easy to understand Video" Thanks 😊👍🏼👌🏻 Used a few techniques I learnt from you from your Various "How To" Videos to build my own E-Bike (Mid Drive) & Battery Packs (15S /10P out of Sanyo18650GA Cells) for a Enduro E-Bike BBSHD Build
Thank you so much. This is the BEST and well explained video for a person like me that has only some light knowledge of electricity. I want to build a light kit for my bike to help me commute to my work without getting there with no sweat..... THANK YOU!!! Subscribed
Wow! This is an awesome video! One day when I'm feeling really ambitious I might try this!
Hi,You weld the batteries, but is it OK to solder the nickel strips?
Nicely done. Lots of useful detail from someone who's clearly done plenty of battery building before. I've been meaning to get a battery welder for a while now. Any particular reason to pick the 787A versus other hardware?
With all that insulation & shrink wrap, is there ever a problem with heat management of the cells? Will the cells heat up with fast discharge of fast charge? And how many charge cycles might you get. Excellent video! Thanks for posting.
To get the best results: as not all cells are created equally & there is likely always small differences in the top village they reach, you should measure a bunch and try to line them up in two rows (in this case) of seven in such a way that both the two rows will show about the same Voltage and then ONLY connect the two rows at the outer polarities (as opposed to, connecting them in pairs of two's all the way). It will minimale the indecency inbetween doubles and on, wherein unequal pairs and so on will drain percents of each other (and be probably only less than 70% efficient in that) from the highest to the lowest of each pair in order to them trying to keep evening out. Connecting two rows of seven apart from each other that way and only doubling up at front and end may save you a few percents of loss after charging.
your post is poorly written and therefore difficult to understand.
Great vid. I used nickle rollers with thin slice of wood dowel glued in the ends. White wool for bus bars, red wool for positive, black for neg and blue for jumpers. Made it easier for me anyway because it's 3d.. 😅😅 ps. I build circuit boards from scratch (board diagram from schematic, etching, drilling, placing, soldering etc, etc..) so no stranger to electronics. I have never built a battery pack tho and It took a couple months of research before I felt comfortable even mocking one up. I learned the nature of lithium cells and how to not burn your house down.. and In the end I ended up buying one anyway because it turns out that my homeowners insurance won't cover me for fire if the "homemade" battery erupted into fire for whatever reason. I do feel tho that my battery would have been top shelf with minimal heating up. The bms I was looking at had settable parameters like shutting down charging at 80% with active balancing I would never need to charge them to thier full value. I did overkill on the parallel to series connections with each group's amp handling at 30, which is the max I would be pulling from the entire pack.
I've gotten tons of questions about where I got these materials. Everything can be found here:
18650 cells: goo.gl/tVjREI
Nickel strip: goo.gl/VIrNQq
Spot welder: goo.gl/cZS1yC
BMS: goo.gl/S6gSQx
Silicone wire: goo.gl/xmpbKD
Black 18650 cell spacers: goo.gl/hQxWF6
Large heat shrink tubing: goo.gl/6v1ow9
Foam sheet for protecting battery: goo.gl/5e71tE
Hi will these batteries work, i'm not sure because they are a lot cheaper than the other ones on ebay.
www.ebay.com.au/itm/Brand-Tikon-3-7V-Rechargeable-18650-Li-ion-Lithium-Battery-Cell-Fr-Flashlight-OZ-/331328395337?var=&hash=item4d24b61849:m:mrpIJrj1oWd5miqvwQUBOXA
Hi there , Great video I'm planning on building an Ebike and I was wondering if these are a decent battery www.alibaba.com/product-detail/Hot-sale-hight-quanlity-3-7V_60169974596.html?spm=a2700.7724838.0.0.mpG9Mi
Pancake - No, I'm sorry but these aren't so good for ebike use. They cheaper chinese cells and are of questionable quality. These work fine for flashlights, but aren't appropriate for high power devices like ebikes.
Thanks for the response but were you referring to the batteries I had listed or pancakes ? or both?
Richie, sorry I thought I had tagged that. I was referring to Pancakes. Now I see yours. Those look like either knock offs of Samsung 26F cells (perfectly good but low power cells) or they are genuine but the vendor doesn't have the rights to sell them so they aren't showing the label with cell info. If they are knock offs then they are only as good as the average cheap chinese cell (not very good). If they are genuine, then they are just fine but you'll need to use enough in parallel to cover your current needs since they are low power cells rated for max 5A draw each.
this is like magic, I loved ur work, the tools the tape the souder ..basicly every thing *--*
my favorite new catch phrase, "let's get shrinking!" 😂 awesome video, thanks for the info
the best video on DIY battery. nobody explained the connection in the other side of the battery
Great video. It was fun watching your spot welder!
Best tutorial on 18650 packs so far
This laptop battery is the best quality, I also made one power bank by using the laptop battery.
Watching this video has given me the confidence to repair my own e-bike battery when I need to. Thank you 👍👍👍👍😎😎
Ever try moving the spot weld electrodes a little closer together? Looks like they are too far apart causing minor issues.
ElGattoLoco- agreed. It looks like he's got them set as close as this amazing machine can be set at. I would bend them a little closer.
most detailed tutorial on battery builds out there. well done.
you should make more videos. this is incredibly helpful to people!
Thanks! I've got a few more coming, don't worry!
Please do a video on how to build a 36v 12a thx bro
I've got a video upcoming where I increase the voltage of a 24V 20AH battery to 36V 20AH by adding cells, hopefully that will be helpful for you!
Keep em coming! :)
E-Bike GOD!!! Thank you for explaining so clearly. 100% Recommended Video
Hi Mike,
Could you do a video about the various BMS's, (smart BMS vs regular etc) and tips about what to consider when searching for one, you know, kind of guidelines for selecting the best one suited to the battery we build?
תודה מראש! 😉
Watching you heatshrink the pack is strangely satisfying.
Brilliant. Where can I lend this welding machine? In a library?
easy to find on aliexpress or ebay. also you can do it yourself, search on TH-cam - battery solder from microwave oven
Thanks.
This is where I got my spot welder goo.gl/cZS1yC
EbikeSchool.com not available anylonger
AR AD I got mine at m.aliexpress.com/item/1688174875.html on sale for $180, but I haven't actually used it yet.
Can't believe I watch this whole thing! Awesome video
Hey, first off just have to say I've found your video's really informative! Love how they're organized and they've really helped clear up things. Just have a quick question for you: If you're building a 12v battery from the panasonic 18650 cells. Would you recommend using 3 cells for 11.1V? or 4 cells for 14.8V? I know the maximum capacity is 4.2v (which would give you 12.6v for 3) but I'm thinking I should use 4 because that way I wouldn't discharge the batteries as far. (keeping them "healthier") Am I right by going this route?
Devices like radios connected to the battery in most vehicles experience a range of voltages. When the battery is charging the alternator maintains the system at about 14.5 volts. With the car off, the battery voltage is 12.6 (when full)
At lower voltages, the current passing thru the connecting wires increases. Most devices perform better (cooler) at the higher ranges.
Just a heads up. Did you push the 8 way connector fully in? At 21:27 before you wrapped the foam it looks like the connector was not fully located?
I wish you could explain why you have a backwards 1/4" phono plug and a negative wire soldered to the outside of it. I'm not familiar with this connector, but to me it looks like a music plug soldered backwards. Also I've done basic soldering and when you are soldering those wires from the BMS to the nickel strips you will notice it is beading off the strip like water droplets on glass. If you tug at those connections they should come off easy, you're supposed to either use fine sandpaper to rough up the surface or flux. any time I've seen solder look like it's beading off something and it looks like it's having a hard time sticking it means poor adhesion
Hi Bruce, what you are seeing is a property of solder known as "wetting", where the solder spreads out when it reaches a certain temperature and adheres to the nickel. It might be hard to see because I sped up the video during the soldering, but rest assured all of those joints were tested and are quite strong. Regarding the RCA plug, it's only a "music plug" if you've got music going through it. Otherwise it's a generic electrical connector. These are gold plated RCA connectors that can handle up to 5A. Other RCA connectors can carry up to 15A. The outside of the barrel on the mono end is negative and the tip of the barrel is positive. This correlates with a standard in the ebike industry for using the center of RCA connectors as positive.
EbikeSchool.com very interesting, thanks!
@@EbikeSchoolwhat is the recommended charger for this battery pack?
Hi Mika. I have two of your books. I'm now ready to order my first batch iof 18650's can you point me in the direction of a supply of good quality 18650's please...
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You are so good at explaining , I have an ebike and the battery is not charging . what should i check before messing up the whole thing
would be good to show how to make a charger for home designed battery packs
Why make you own when you can buy a good one? You only need to do it once. Cycle Satiator is good.
YOU NEVER SAY WHAT TO DO AS IN OPYTIONS IF TWO OE A FEW CELLS ARE BAD? YOUR CHANNEL IS EASILY ONE OF THEE MOST USEFUL ALL SCHOOL NO GYM CLASS THANKS LOOL
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Dude, where did you learn to solder? Not one was up to even Ok!
I will second that comment! They are probably good enough to work, but definitely made using a flawed technique. Sorry to be negative :o)
Thank god it wasn't just me that noticed that. It's almost painful to watch
This vid i think was more on how the cells and bms are connected than technique. If you noticed those cells have marks from previous welds before he put the pack together
Yeah it was only the wire soldering portion haha
Tech Talk soldering heats up the cells significantly. Lithium cells don't like getting hot.
I’m in the middle of building my first battery and viewed your other video about testing the nickel strip to see if it’s plated steel, after putting a piece in salt water overnight it rusted. I have pure nickel welded to the top, .2x10mm strips, do I need to rip it apart to remove the plated steel and rebuild with pure nickel or will it be fine? It’s a high amp pack that could draw 25 amps per cell. 13s6p 21700 molicell 42a ( rated 45 amps per cell) 0:11
Please get yourself a good microphone and the lights that don't flicker. Turn off all the auto-settings on your camera, so the brightness doesn't go up and down, the color balance doesn't go from warm to cold (like at 1:00).
Just enjoy the free content, since then humans started bitching around everything?
HI that is great video. pleas tell men 36v. if the one cell is 3.6.you need how many cell?
10 cells
Can you teach us how to make a 48 volt battery pack?
Ebike School has a video: DIY 52v 10.5ah lithium battery from a kit
Before I noticed that one I saw this video (off to the right) from Rinoa super genius: DIY 52v (48v) 16AH Lithium ion 18650 ...
It's so funny because I have a 29" bike I'm having a hard time finding ebike supplies for and just last night I noticed 29"/700c as if it's the same thing and then I saw 28"/700c. Gotta love it. Neobattery is the place to get the batteries from $5 in lots of 40 or 100, they're on eBay and probably have their own site.
TrustInJesus111 I have 18650 batteries that I took apart from old laptop batteries. I am not 100 percent sure how to make a 48 volt 10 amp hour pack. I have soldering stuff, and spot welder just don't understand the series and parallel yet and how to get 48 volts. Lol
you just add more cells dude
26:42
Can u do simple division and round up? 48/3.7
This is the video I've been looking for. I'm looking to build my own e scooter. I'm thinking 60v 30a+. Expensive to buy so want to build my own battery for e scooter. Great video.
macgyver would use duck tape
wrong! Just bread and water. Perhaps some milk as well
JarppaGuru an egg, 2 batteries, a wire and some ice cubes. But the problem: it would explode
JarppaGuru You forgot about the paperclip.
JarppaGur
I make a 24v 15ah battery pack.The best 18650
(....) mah and how many batteries are needed? Please say if any kind of BMS will take place
Hello Amazing creativity work , for 24V 15Ah battery pack , if you made this by 2600mah cells ,
for series , it will be 7 cells ; but for capacity , you will need 6 cells , 7*6 = 42 pcs , you need 42 cells in a pack .
Please say if any kind of BMS will take place
I was going to ask a question, but apparently you aren't answering them. You only want people to go to your website to ask. Isn't it easier for us to ask here? Anyway, since you're not answering, nvm. Btw, what strikes me is that your using an expensive thing like a spot welder, but you're not using spacers to keep the batteries better ventilated.
Hmm, good point. People don't waste your time, he doesn't care about your questions. Moving on.
he answers some questions
what's your question?
you might be able to find an online forum to answer your question
Hi dude! I really like your videos!!! But i have a question, why you use nickel strips instep of Cooper strips?? Hope you see this, thaksyou!!
great video, plz I have a question : It is safe to run Xiaomi scooter ( 250watt motor) with hoverboard 36v batterie ( 20 Samsung battery)? ?? plz I need your answer
Great Video. Thank you. O bouth an old wave 2.0 ebike from my friend but the battery does not work. He said it was something simple..but NO. The battery has 50 batteries. I understood how to do the one on your video, but 50 batteries I would be lost. Another thing. I do not have a Spot Welder. Is there a way to do it differently. I appreciate your help. Thank uou again
Really nice video! I have a MagicShine MJ868 lamp with no battery and
would like to do one my self. Is this how i do it or should i use
somthing else? The original battery is 4×18650 SAMSUNG Li-ion battery
(7.4V 5.6AH)
hello! What should I change for an electric bicycle battery (36V 9Ah) that no longer charges at all? I specify that the charger is ok. Are the cells the problem or the BMS!? Thank you for your answer!
Great video.You must make a video about the motors. I would like to make a bike to go at 50km/h... most for the hills...but it is so many the motors in the market and I don't know exactly what is important when I compare two motors. First I choose the motor and upon this, I build my battery or the reverse?
So let me get this straight? On MOST lithium ion scooter packs there will be the output connection usually xt60 with thicker black and red wire and then a charging connection as well correct?
Just a thought with connecting your wires from the BMS you solder them on. Why don't you solder the wire on to nickel strip and spot weld them on to the battery?
If you do not have a spot welding machine, would soldering be a good enough alternative?
Unfortunately no. Some people do solder their 18650 cells but this is bad practice. It not only damages them by overheating the cells, but it can be dangerous and lead to fire if you heat them too much. So you'll see some people do it, but it's definitely not advisable.
Very educational....I have a cruiser and I enjoy it but for quite a while I've been wanting to make it an e-bike....there is a bycycle shop in town and I am curious as to what their thoughts and input would be. I watch these folks go by on motorized or e-bikes bought by kit or the whole thing.
thank you so much for this video you have properly explained series and parallel and how to read wear each wire to the bms goes i will attempt to build a secondary battery for my escooter as the main battery is not very strong mine will roughly be double the size so 48-60V
Should i trust buying prebuilt battery packs from amazon? Looking into 72v 20-30ah batteries. Where do you recommend i shop for pre built batteries online? Preferably USA fast shipping
Hi there
Thanks for your time for showing and explaining this important things of e-bicycle battery
My question is what should I use to make the battery to last long distance driving..?
Thanks for your time
If you mean long range then you just need more cells in parallel .This battery only has 2 cells in parallel because it is for short range. If you mean long lifetime, then try to charge the battery up to only 95% or so and not drain it all the way to empty. That can double the lifetime of the battery.
EbikeSchool.com hi
if we add more sell ,doesn't bring up the voltage?
Im curious if the tranformer welder you yave with max of 800a is somehow better than my super capacitor 2400a welder. I can only change the ms of the weld time and nit the amos so the higher the ms the higer the amps theyre tied together.
I was just curious
Edit: nevermind i commented this same video 4+ years ago and never got an answer. Haha. I guess dont comment on old videos.
Turbo Bob I think you make the best videos for eBikes on the Tube, what I would like to do is build a 48v Samsung 18650 30Q from start to finish, using at least 52 batteries if that is possible, step by step, with a BMS. I am a little confused on how many batteries I will need, and how to select a BMS. I have automobile experience so it is not that new to me.
Hi, Your videos are strong and best! Plz want to know if i want to support 36v 350w hub motor with 36v 14A+- controller by 3.7v 2500mAh@3C (Hvvea 18650-25F) do I still apply 4 P & 10S, what BMS should I need? 20A?
I've been plugging the battery then the AC to the wall outlet and all the 120 v prongs are burnt like arc sparks . My charger doesn't fully charge anymore just for 2 to 3 minutes..Do you think the capacitors are faulty ? Thanks
hi Mike,
i saw a guy using a battery as a spot welder, which is just two pieces of 2.5mm sq cable straight of the terminals and used as probes for the welder. it was nicely made, but no timeing.
he just pushes up against the probes and then takes it off.
the reason i talk about this is becuase i have just seen your video about thermal heat.
thanks
i already have the ebike book, but would love the battery pack book.
thanks
Hi, thanks for all the training on preparation of battery, I have a 48v 13 ah battery need to convert it to 36v 13ah battery could u pls let me know the easiest way to do that, awaitinf for your prompt response and thanking you.in advance
I have to make 2 single rows of 12 flat battery pack for e longboard. I notice when you do your series you use 4 batteries, does that mean only 2 add up the voltage and the other 2 build up the mah because their parallel within a series?
Do you have to balance the batteries before you connect the BMS, or just go by the voltage?
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What do you think about using 26650 3.7V 5000mAh (5024mAh tested) cells in leu of 18650 cells in a ebike battery pack? Same voltage so 14 cells would deliver ~52V but the AH would be ~70ah vs ~18-20ah for the 18650? These seem to be the way to go, but just learning about batteries so maybe not. Thanks.
So I am assuming we don't have to worry about the batteries getting hot either during charge or discharge? Great Video, thanks.
Interesting. Why you make this yourself ? They are better than standard available battery packs ? Do the commercial battery packs on a e-bike also have a BMS ? or will that bms be included in the controller ?
I've just spot welded a 7s 4p out of recycled laptop cells. I did it because I have an old electric scooter that used an old an heavy 24v battery, it has 250w motor. The old battery didn't have a BMS and it was charged using a circuit board that also controls the motor, I believe it has over discharge and overcharge protection. Can I use the battery I built without a BMS? This would be just for testing out if the scooter is still worth buying/building a new battery or I risk blowing up my feet?
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Please provide how much current can carry with that nickel sheet. Thanks in advance.
I do not intend on doing this but curiosity is getting the better of me.
Lets say 1 cell is knackered in parallel group that is dragging down the whole set, and you did not have a spare cell to replace. Is it safe to cut that dodgy cell out and throw it and not replace? I get that you would have a slightly smaller AH battery. But would this cause issues in terms of balancing or anything else?
I appreciate your videos. Im building a 36v battery i think 9p10s battery for my scooter. Im shooting for as much amps as possible. It is a 36v scooter with a 500watt motor. I see 36v 26ah batteries packs for sale on aliexpress with a charger for about $300, but I want to build my own for gaining experience. I already have a charger. I am most confused by what exact cells I should use to try to get the most amps. And where to buy. any thoughts appreciated.
Hi, im wondering why would you use 3 nickelstrip connections from the 3 parallel cells to the next for the serie connection? Is this also possible with one connection for possitive and negative?
i mean 2 nickelstrip connections
Can you explain to me about the wire gauge used to solder the batteries..? Since you use nickel strip, how much current allowed to flow through the the strip..?
Hello Sir. Nice video, like your ebike school project.
Have a question. I have cheap Sunkko welder. I am able to weld nickel strip to battery prety strong, but can not then weld nickel to nickel. It is very loose.
Same when trying to weld two nickel strips without battery. When I added current I melted bottom strip.
Anyway, dont you know what 4P, 6P, 8P means? I can combine it so I suppose 4P and 6P on will give me 10P. What setting you use usually.
Thanks a lot.
I'm using a double pulse at with the welder set to 40. That's very odd about melting the lower nickel. I recommend trying to lower your current and see if that helps. Otherwise it might be a defect in your welder.
Best explanation about make custom batere, i'm newbie, my i ask? why we make custom batere? why wenot by new pack batere with same spesification at pabrican?
Dymo labeler reminds me of my grandmother's house... only the labels fell off after 30 years. lol. if you put it between the layers does the shrink rap get embossed? Thank you for a good quality video with concise detail. I like that you share your thinking process as well as the procedure. Great presentation skills too. Better than Cats!
DFA Beagle that’s a marvellous idea for embossing shrinkwrap, I must try that sometime :) thanks!
Hi I have a 24volt 5amp battery on my bike could I use this method?????
HI I’ve been tasked by local eBike shop, to repair some BH eBike (Evo Easy Motion bikes) The batteries look OK all the cells and packs are fine but the BMS refuses to let the batteries charge or power the bike. You seem to have a lot of BMS experience. Could you recommend a unit I could buy on eBay to replace the original as we can’t get any spares ? Im assuming the BMS can be programed for the ebike battery setup & voltages ?
Hi, I have an e-bike which the battery was faulty and was not charging. I have disposed of the batteries however they were completely different to 18650 cells as these ones were 7 oblong cases with + - at the top of the each case measuring a 4.2v. the casung has a key oporating mechanism and fuse. The charging terminal is also different. Your video is brilliant and I was wondering if you could make a new video showing how to connect the battry you have thought us to build to the existing battery case. I know every bike's battery case is different but I would think the principle would be the same. Look forward to hearing from you.
Very informative video! I would strongly sugest to add some more safety proticals. Like wrapping the cells in fish paper aswell as the tops. Cut the nikel so theres no sharp edges because they can poke a hole in your shrinkwrap.
Quick question should you charge up the battery’s before you start, if your using repurposed batteries
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Why do you have parallel battery connections? Is it to obtain the AH charge? What is the AH you are trying to achieve ?
Hi. Are you llways using high discharge current cells for scooters and ebike?
Link of Samsung cells in description is not high discharge cells
Is it possible to reconfigure a high Ah battery pack to a higher voltage? Change connections from parallel to serial?
Can you solder it instead? I'm really good at soldering but I don't have a welder lol
At 6:14 Do you risk anything or this is just for the sake of the batteries?
I have a mobility scooter that runs off two 12volt sealed lead acid batteries, if I wanted to change to 18650 battery packs how big do you think they would have to be?
If you are unsure of your electric motor's tolerance, you could use LiFePO4 18650s instead. 4 in series will give a nominal 12.8v. Same as a SLA battery.
Very nice video! I'm planning to make a electric bike and I found your channel! Really good videos! And you are good on explaining! Keep making!