I have seen many battery making videos. this one being one of the most safety oriented ones. others use really unsafe methods of connecting the cells, ignoring the possibility of error and so on. thank you so much for a good video!
20S12P with 200 amp discharge, 72 volts 36Ah ... I just purchaesed 3 of your books on Amazon... I am looking forward to building a battery for the Luna Galaxy Paint I'm gettin. Thanks for the video's.
I am planning on building a battery for a Viking Tandom Tadpole Trike my son and I built a few years ago. This battery with supply power for a Bafang 52v 1000 watt Mid Drive Motor I intent to purchase to complete our project. Your videos are highly informative as I am sure your books are even more so. Thanks for all you do for the DYI world.
I love the simplicity of your videos, I just built my first mountain bike conversion and with your video on how to build power packs , I’m confident I can make a proper power supply for my 2000 watt hub system, I’m a subscriber and I give this video 2thumbs up 😊
I am currently working on a motorcycle conversion project. This video is gold! I will need to buy or make a 72V battery pack to get this bike moving and I plan to copy your work as closely as I can.
Hi Micah, I cant thank you enough, in 6 months time I went from total newbie not understanding a thing to a competent person ready to build my own ebike from scratch. Between this channel and EbikeSchool, your book and Vruzend there was enough material to keep me busy interested and learning for days upon end, and I enjoyed every bit of it and still at it. There is one subject that keeps eluding me and that is controllers, I dont know if you had that covered already on your channel I couldnt find it and I would love to learn a bit more about that. And while on the subject, what are the chances of you developing and offering a product like that for sale? Thank you.
Hello Lynda, I'm a newbee to this thread and everything still looks like magic to me. I am amazed at your recorded successes. I wrote to the presenter but have not heard from him. Can I buy one sample of your own build 72V battery to help me "step by step" in studying the procedure as a newbee. Also, where can I buy all the required parts from? Where store sells them? If you send me your phone number I can also call you. My name is "Bill", I'm in New York and my email is cctvwholesaler@gmail.com Thank you.
@@D_Onibokun the only good way to learn about building battery packs is to buy his book, it is by far the cheapest, shortest and most safe way of learning ALL you need to know about lithium packs. It covers absolutely everything, from basics of lithium chemistries and different types to sourcing, ratings, building and construction methods, management, connections, charging, everything and anything to do with lithium batteries is covered in that book. Cheap too, best 20 dollars you will ever spend. Book is "diy lithium batteries, how to build your own battery packs" by Micah Toll , available on amazon, he has a couple of other good books too. Dont know what parts you are looking for but plenty of websites around the world sell lithium cells, one of them is vruzend.com or co.uk and they also sell some other great stuff like assembly kits for builings complete packs, bms, chargers etc. Read that book and watch few of the uploads on this channel and you will have no problem understanding where and what you want to do. Research and discovery is the next best part of the journey besides building, for me at least.
Dollar store cutting boards rock I use them for all kinds of fabrication, mostly for directing air - Custom pc building, a/c to water chiller conversion. Also backing for drywall repair. Cheap, rugged, non conductive, waterproof. Oh, made a sanding attachment for my drill too
I think he is placing it where the motor/gas tank goes so when it is in motion the air going around it will act like a cooling system but just a guess on my end
MJ1's are not high drain cells by any stretch. Also, with this hexagonal packing scheme, the batteries near the center of the pack will get a lot hotter than those on the outside. That's of course dependant on how much power is charged or discharged, though.
Hi Micah; Thank you for your videos and content! I own you battery DIY book, and I have read several of the chapters two-or-three times (I don’t want to set my house on fire, or hurt myself) but your videos “round out” the topics. A 20S12P, 72V 40 A hrs, 2.8Kw battery! Now that’s beefy! Thank you!
Great video Micah. I learn more from you and your battery build videos than anyone else. You actually teach by explaining each part of the process. Great job! Thanks!
Can't wait to see the finished product because I've been wanting to do this for a while now¡! Thanks for doing it and getting all the important details right... That's helps alot. 😊👍🏻
Another CLEAN build bro! I used the 52v triangle video battery for a couple of my bikes and now I'm feeling the need for more speed & power. Gloves and the plastic cover while welding can save you a BAD burn so listen to him! I put the nickel strip on the wrong cell once and burned my finger almost down to the bone cause with electric burns you won't notice it till a couple seconds after its too late. Just be careful. I still get nervous building these things after that s**** so better safe than sorry, 72v will burn BAAAD
Thanks for everything you share, Micah! I am making a 10s2p but it needs to be layered (cube shape 2x5x2). Seeing you fold this with the plastic sheet in between answered my question
As i saw your video first time but its so helpful you have told all the connections with safty ....thats awesome ..become fun of yours ....i am from India
actually since lithium batteries are explosive if cut or damaged, people are researching new types of batteries with even higher energy densities compared to li-on. The guy who worked on the li-on battery helped with a new battery based on glass and sodium and it has 3x higher energy density compared to li-on. www.forbes.com/sites/unicefusa/2019/12/26/qa-austyn-weiner-in-senegal-with-unicef/#57ed73ae59e3
Hola Micah, Merry Christmas to you and yours, I've made it just under the wire (11:27PM 12-25-19). Glad to see you back, healthy, wealthy and having fun. I have 3 words;eHONDA eHONDA eHONDA!!!!! Really want to see this project's progress. This video is a great continuation and contribution. I'm more excited now than before!!.I don't like the look, or how NOT nimble they are, but for $500, I couldn't pass up an eDrift Fat Tire Scooter. It needs a larger pack than the 60V 10ah Li-Ion it has at the moment, so this video may be instrumental. Do you have any thoughts on overvolting that eBike's 1500W Brushless motor's speed controller? BTW; something I've been doing to my 57V (soon to be 61V) "Vruzend" packs, since I live in So. Cal. ie the Mojave Desert, is NOT completely sealing the battery packs I build. I leave 2 sides open, so there is airflow through the pack. On my little 32mph 750W Brushed Motor CURRIE Schwinn "TESLA" eScooter (stock was 36V/15mph), I also drill out/swiss cheese the bottom floor of the battery case, so air can get up into the pack and add even more cooling. Even in the 90-100 degree temps that I've run my eBike packs in this last summer, none got over ambient temp and my packs are as strong now as when I built them. Just a tip that I hope may help for those of you in hot climates. Now, heat shrink is cheap, so for this cold(er) time of year it's easy to seal those battery pack sides up & the holes in the battery tray and allow the packs temp to stay inside to help keep the pack warm as well. Then, just cut the sides back out for summer and only do the reseal job once a year. Thanks in advance.CheersBoots LangleyLa Mesa, ca.PS; Hey, I have a decent Resume myself;Mechanical Design & Machine Drafting (2 yr Tech School Degree), a lifetime of Automotive/Motorcycle Service, Repair & Restorations/ Racing , including several years as a Technical Editor (Cordura Publications/ Mitchell Auto & Truck Repair Manuals). Any need of a part time, Old, toothless, fat guy as a USA/So. Cal Editor of anything Electrical Transpo Related? Especially 2 wheeled? Just wondering!! ;-)Thanks in advance.PPS; I just spent 30 minutes typing and spacing and creating a completely readable message and stupid youtube turned it into an almost unreadable blob of text!! SIGH!
Thanks Micah, I have 3 not working, good, nearly new ebike batteries: (52v15ah, 52v14ah, 36v8ah) plus a few small packs for a few more cells, and a spot welder, i want to combine my cells/packs to get a 72v battery for a new upgrade to an old 2014 A2B Alva+ with the 24" MXUS 3kw kit. what should i have, or do, to best build my battery. As far as shaping it, mainly, the original battery on these bikes wrapped around a beautiful strut under the rear rack, so if i could shape it to do that again that would be optimum.
@@MrNobody_1618 first of all, you need to consider the basic cost of materials and battery cells. Then the manhours to build it, and then the final manufacturing that ensures minimal hazards for the user once they install the battery to an appliance. When you do it yourself you can jsut jerry rig whatever idiotic bomb you desire, but as an actual industry supplier you need to achieve certain safety standards. This all costs a ton of money, especially when you aren't a mass producing manufacturer. Price always escalates exponentially when you go up in size and complexity per unit.
What size of nickel strip did you use for the connections. Was the parallel strip the same size as the series strip ? Looking to do a similar project for perhaps a 150- 200cc equivalent. Thinking about a123 cells or using a electric car pack. Thanks. By the way did you ever finish this project ?
@@Meonlymeagain take a look at batteryhookup.com - they have a steady supply of standard new cells, plus a fast changing stock of salvage stuff from ev's and industrial recycling. Have to check frequently if you want to snag the best deals on the non standard stuff.
I'm just starting to convert my old year 80 into an electric street bike so of course I have to source some street tires and appropriate lighting but I'm looking forward to the challenge. Hopefully I win one of your books. Would probably be really usefull
Great instructional video, I’m also working/planning on building my own 72v lithium battery pack for an electric Chinese bike that I salvage but it instead had lead acid batteries which are completely dead and can’t hold a charge. Hopefully I can start this project before the summer begins.
He sir i am your big fan I am mechanical engineering student and i am working on e bike project And u r my inspiration. I just want a live session in which i can clear some of my technical doubts
hello great job Is it better to weld the series together first? and then the parallels? or does it not matter? in some videos it's built with busbars and fuse wires, what's the difference? I think your manufacturing is better...
I had this question in your last video, but I think I know the answer now - Hi since this is latest video I hope a get a response 😅 Basically I have a 14s 2p battery with mj1 3.5ah 10A cells with a 30a bms and 1500w motor Basically if I give to much throttle the bms is switching the power off and I need to unplug and plug back the battery otherwise the power won't come up Do you know why this is happening and what I could do to fix it Thanks in advance
The battery voltage rating is: • 14s*4.2Vmax= 58.8Vmax • 14s*3.6Vnom= 50.4Vmax • 14s*2.5Vmin= 35Vmin The battery current rating is: • 2P*10A=20A Power (W)/Energy (V)=Current (A) • 1,500W/58.8Vmax)=25.5A • 1,500W/50.4Vnom)=29.8A • 1,500W/35Vmin)=42.8A The 14S/30A BMS rating is 50.4Vnom*30A=1,512W To put it simply, you've connected a load greater than the system rating. Especially considering that electrical circuits are typically specified with a 25% safety margin. Yours has almost none. Not all Battery Management Systems are created equal. While the BMS is _rated_ at 30A, it may not be up to pumping that much power on a continuous basis. Most likely, the BMS is disconnecting on over current. What's unseen is how your batteries are being damaged. They may be *rated* at 10A, however they're *capable* of discharging at higher rates, up to and including that of a dead short. When goosing the throttle to full power, depending on state-of-charge, you're pulling between 25.5A and 42.8A from a pack rated at only 20A. This generates a lot of heat, and heat does two things: If there's enough of it for a sufficient duration, there will be fire. However, without fire, the life of the cells is being drastically shortened. You have two choices: *Option A:* Decrease the motor power rating by governing it down, or replacing it with a smaller motor. *Option B:* Go to a 3P or 4P pack, as well as a 50A BMS. Of course, you could always keep your "foot off the gas", so to speak. Best of luck.
Bro i am india, I am planning to make an electric car using 72 v 5 kw BLDC motor, And i am watcing so many video for making battery pack, But this is one of best video i have watched till now.. Great work..I would like be in your contact..
It so interesting to see your videos,I really wanna learn how to build my own battery when the time my E-bike battery failed.I have 48V 15 AMH on my hey bike ranger 500 w motor.Looking for up grade for high voltage and amp hour battery and bigger 750 w motor.
TY for another video . You say cell must be at the same V b4 assembly ; getting 00's cell at exactly the same V is ideal but unlikely so what is a range that is acceptable 25mv ? the cell i have purchased have 3.226v-3.236 ATM , it's going to be a couple weeks b4 i have the missing hardware and assemble the pack , i will mesure them again then , that will also tell me if the $ i spent was worth them , cheers & ride safe
Hi. Thanks for this great tutorial video. I was wondering if its easier to build what you did here using 9v batteries. What are the obstacles that you will come across with building a pack with 9v batteries?
Wow I have no idea how I ended up here, but that was pretty entertaining. Im used to only using 1 18650 cell in flashlights. Now to see so many all wired up together was cool!
I have a 48v 1000w rear motor hub in which I'm using 60v30a(16s10p) to push it. The problem is that it's getting hot and, I guess, the magnets are swelling up(expanding) and causing the motor to seize up. Once it cools it will spin again. What's going on? Great vids by the way
Looks like you tore some of the battery protective casings when inserting them in the holders seen middle of battery around 3:00 of video the heat shrink is all wrinkled. I am thinking this might be a potential failure point if the heat shrink fails and have some leakage. the rest of the steps seem well done. cool project! good work
This was awesome Micah. I have an ONYX RCR with a 72v setup, been thinking about making a battery for it eventually. Really excited to see your motorcycle progress.
Shouldn't the BMS be outside of the battery pack? won't shrinkwrapping it in with the batteries over-heat it? I'm new to the channel and don't know how hot these will get. Looks cool though. I was considering buying a Zero FX this summer but now I'm reconsidering.
Question. New to doing packs. You do series first, then you do parallel. Why not do parallel, then connect the parallel blocks in series? Wouldn't that be less welding as you would only have 2 connection from block to block. To me, it looks like you built 140 cells in series, what am I missing :)
I am brand new at DIY lithium battery building. I’m still quite confused about most aspects of the process. I think I need to get a hold of your book on the subject. Thank you for how well you present information.
One thing that scares me about lithium is its instability at high (but not impossible) temperatures, under the sun or while charging. There's some precaution to add to avoid any danger?
Great Video, To the point & detailed, & Skipping the waffle that other people include. Weight of completed battery? is it 12kg? Why do you use Cris-Cross of nickel strips? One wider nickel strip could weld to 24 batteries ( or 10 & 14) , thus halving the number of spot welds? Minute 6.38 in the first row of 2nd half pack, there are 2 groups of 3 cells , a change from the general pattern . Is there a reason?
Also If you are ever considering building one of these and cutting corners and just soldering with a $12 iron and wire, think again. When you finally get the connections right after 14 hours of struggling they will come apart during your travels and you will kick yourself, have to rip the whole battery open and redo until you finally just get fed up and buy a spot welder. Take it from me I tried to cut corners and it cost me days of extra work and extreme frustration. Time is as important as money when building these things
What about heat dissipation? And short protection? You know if something goes wrong that’s allot of burn time there. Heat shrink is nice but not puncture proof. Obviously you are experienced with battery packs and I’m a noob. So could you explain your thought process on safety please.
I would be uncomfortable with those wired connections between the top and bottom face of the pack resting directly against the inner folded connection strip. If one of those wires rubs out from the vibration, wouldn't it short across both layers of cells?
Bought your ebike book. Watched many of your videios. Liked & subscribed and have really learned a lot. Building folded 36V/20.4AH/10S6p ebike battery to convert my existing mountain bike to front drive ebike. One question on this video. The white insulated wire you used as parallel connector near end looks like dual 14 Gauge lamp cord. Shouldn't it be 10-12 gauge for the amount of current your pack is going to deliver?
A good tip to customize blue shrinking tube is that you can glue them together with superglue to create really big tubes or custom shapes. Note that the superglue won't release when hot air is applied l. Happy building!
LG MJ1 cells go for around 5 dollars. 240 cells is 1200 dollars. If you get 1000 charge cycles that's 1.20 dollars per charge. Those old Hondas get very high mileage and range isn't an issue because of gas stations. Is there a goal beyond making an electric motorcycle?
Thanks for running a new battery build Micah once I get a hold of my E-0bike i hope to build a common spare battery or just build a bigger Amp/h battery by connecting them in series.
I have seen many battery making videos. this one being one of the most safety oriented ones. others use really unsafe methods of connecting the cells, ignoring the possibility of error and so on. thank you so much for a good video!
Sure, laying a whole battery pack on the bent connections is way safer than other methods
You like those orange gloves huh.
@@mateng7707when did he do that
If this is one of the safer ones i really dont want to know what kind of videos you were watching before. This build is terrible.
20S12P with 200 amp discharge, 72 volts 36Ah ... I just purchaesed 3 of your books on Amazon... I am looking forward to building a battery for the Luna Galaxy Paint I'm gettin. Thanks for the video's.
I love how every diy battery pack looks like a bomb while making it
On that note. When fully charged, there is roughly 10MJ of energy in this pack, which is about equivalent to a Coca Cola bottle Molotov Cocktail :)
@rbc21 Yeah, pooly used vapes knows that
well, it basically is.
@@vex123 True xD
@B. Lim That dude was a little more insane then a 300w cloud but yeah
I am planning on building a battery for a Viking Tandom Tadpole Trike my son and I built a few years ago. This battery with supply power for a Bafang 52v 1000 watt Mid Drive Motor I intent to purchase to complete our project. Your videos are highly informative as I am sure your books are even more so. Thanks for all you do for the DYI world.
I love the simplicity of your videos, I just built my first mountain bike conversion and with your video on how to build power packs , I’m confident I can make a proper power supply for my 2000 watt hub system, I’m a subscriber and I give this video 2thumbs up 😊
I am currently working on a motorcycle conversion project. This video is gold! I will need to buy or make a 72V battery pack to get this bike moving and I plan to copy your work as closely as I can.
I love all the videos you produce, whether building batteries like this one, or reviewing e-two wheelers. Keep 'em coming, please!
This is one of the reasons why I love your videos is because your awkwardness shows your a human that makes mistakes but awesome input as always
Hi Micah, I cant thank you enough, in 6 months time I went from total newbie not understanding a thing to a competent person ready to build my own ebike from scratch. Between this channel and EbikeSchool, your book and Vruzend there was enough material to keep me busy interested and learning for days upon end, and I enjoyed every bit of it and still at it.
There is one subject that keeps eluding me and that is controllers, I dont know if you had that covered already on your channel I couldnt find it and I would love to learn a bit more about that.
And while on the subject, what are the chances of you developing and offering a product like that for sale?
Thank you.
Hello Lynda, I'm a newbee to this thread and everything still looks like magic to me.
I am amazed at your recorded successes. I wrote to the presenter but have not heard from him.
Can I buy one sample of your own build 72V battery to help me "step by step" in studying the procedure as a newbee. Also,
where can I buy all the required parts from? Where store sells them? If you send me your phone number I can also call you.
My name is "Bill", I'm in New York and my email is cctvwholesaler@gmail.com
Thank you.
@@D_Onibokun the only good way to learn about building battery packs is to buy his book, it is by far the cheapest, shortest and most safe way of learning ALL you need to know about lithium packs. It covers absolutely everything, from basics of lithium chemistries and different types to sourcing, ratings, building and construction methods, management, connections, charging, everything and anything to do with lithium batteries is covered in that book. Cheap too, best 20 dollars you will ever spend. Book is "diy lithium batteries, how to build your own battery packs" by Micah Toll , available on amazon, he has a couple of other good books too.
Dont know what parts you are looking for but plenty of websites around the world sell lithium cells, one of them is vruzend.com or co.uk and they also sell some other great stuff like assembly kits for builings complete packs, bms, chargers etc. Read that book and watch few of the uploads on this channel and you will have no problem understanding where and what you want to do. Research and discovery is the next best part of the journey besides building, for me at least.
@@D_Onibokun we can provide.
How did you learn all about electricity?
Dollar store cutting boards rock
I use them for all kinds of fabrication, mostly for directing air -
Custom pc building, a/c to water chiller conversion. Also backing for drywall repair. Cheap, rugged, non conductive, waterproof. Oh, made a sanding attachment for my drill too
What about cooling, Sorry I am New, but i have heard, generally high drain batteries emits lot of heat.
I think he is placing it where the motor/gas tank goes so when it is in motion the air going around it will act like a cooling system but just a guess on my end
12 Parallel, this configurations will help keep cooling down.
I am sure whatever housing he builds for the battery will also channel air flow to assist with cooling.
Nice job
MJ1's are not high drain cells by any stretch. Also, with this hexagonal packing scheme, the batteries near the center of the pack will get a lot hotter than those on the outside. That's of course dependant on how much power is charged or discharged, though.
Hi Micah; Thank you for your videos and content! I own you battery DIY book, and I have read several of the chapters two-or-three times (I don’t want to set my house on fire, or hurt myself) but your videos “round out” the topics. A 20S12P, 72V 40 A hrs, 2.8Kw battery! Now that’s beefy! Thank you!
I'm doing a project for school and we could really use those books!
Enjoyed watching your making process,all the from Nigeria. And will be grad to learn more from you.
Really interested to see what your typical range and max speed is on this build.
The process of teaching and learning will make a cleaner world for future generations ...
Folding the pack over like that is kinda terrifying, why did you do it that way instead of connecting the 2 packs in series?
He wanted tighter packaging due to the space constraints.
Hi James. Didn’t really understand your comment. Maybe cause I’m a newbie. Could you explain further?
Great video Micah. I learn more from you and your battery build videos than anyone else. You actually teach by explaining each part of the process. Great job! Thanks!
Can't wait to see the finished product because I've been wanting to do this for a while now¡! Thanks for doing it and getting all the important details right... That's helps alot. 😊👍🏻
Wow, your ease with narratives & illustrations makes this journey quite interesting thanks.
I want to see the whole process of building batteries and using them on Ebike. Can you make a video of it?
he just did
@@SupremeRuleroftheWorld where
Another CLEAN build bro! I used the 52v triangle video battery for a couple of my bikes and now I'm feeling the need for more speed & power.
Gloves and the plastic cover while welding can save you a BAD burn so listen to him! I put the nickel strip on the wrong cell once and burned my finger almost down to the bone cause with electric burns you won't notice it till a couple seconds after its too late. Just be careful. I still get nervous building these things after that s**** so better safe than sorry, 72v will burn BAAAD
this is DEFINITELY something I wish I had started learning a long time ago
Thanks for everything you share, Micah! I am making a 10s2p but it needs to be layered (cube shape 2x5x2). Seeing you fold this with the plastic sheet in between answered my question
I cant wait to see the top speed of this thing! my brother in law wants to build one now! LOL
As i saw your video first time but its so helpful you have told all the connections with safty ....thats awesome ..become fun of yours ....i am from India
this is the future. hope lithium mining can become more sustainable for ecology and people.
actually since lithium batteries are explosive if cut or damaged, people are researching new types of batteries with even higher energy densities compared to li-on.
The guy who worked on the li-on battery helped with a new battery based on glass and sodium and it has 3x higher energy density compared to li-on. www.forbes.com/sites/unicefusa/2019/12/26/qa-austyn-weiner-in-senegal-with-unicef/#57ed73ae59e3
Lithium mining is not even close to what oil is doing to the nature and human.
@@username-rs4vf I think a new sulfer battery was created recently
You motivated me... Now I own an ebike... Eagerly waiting for your electric motorcycle conversion video... All the best for your future endeavors...
Hola Micah,
Merry Christmas to you and yours, I've made it just under the wire (11:27PM 12-25-19).
Glad to see you back, healthy, wealthy and having fun.
I have 3 words;eHONDA eHONDA eHONDA!!!!!
Really want to see this project's progress. This video is a great continuation and contribution. I'm more excited now than before!!.I don't like the look, or how NOT nimble they are, but for $500, I couldn't pass up an eDrift Fat Tire Scooter. It needs a larger pack than the 60V 10ah Li-Ion it has at the moment, so this video may be instrumental. Do you have any thoughts on overvolting that eBike's 1500W Brushless motor's speed controller?
BTW; something I've been doing to my 57V (soon to be 61V) "Vruzend" packs, since I live in So. Cal. ie the Mojave Desert, is NOT completely sealing the battery packs I build. I leave 2 sides open, so there is airflow through the pack. On my little 32mph 750W Brushed Motor CURRIE Schwinn "TESLA" eScooter (stock was 36V/15mph), I also drill out/swiss cheese the bottom floor of the battery case, so air can get up into the pack and add even more cooling. Even in the 90-100 degree temps that I've run my eBike packs in this last summer, none got over ambient temp and my packs are as strong now as when I built them.
Just a tip that I hope may help for those of you in hot climates.
Now, heat shrink is cheap, so for this cold(er) time of year it's easy to seal those battery pack sides up & the holes in the battery tray and allow the packs temp to stay inside to help keep the pack warm as well.
Then, just cut the sides back out for summer and only do the reseal job once a year.
Thanks in advance.CheersBoots LangleyLa Mesa, ca.PS; Hey, I have a decent Resume myself;Mechanical Design & Machine Drafting (2 yr Tech School Degree), a lifetime of Automotive/Motorcycle Service, Repair & Restorations/ Racing , including several years as a Technical Editor (Cordura Publications/ Mitchell Auto & Truck Repair Manuals). Any need of a part time, Old, toothless, fat guy as a USA/So. Cal Editor of anything Electrical Transpo Related?
Especially 2 wheeled?
Just wondering!! ;-)Thanks in advance.PPS; I just spent 30 minutes typing and spacing and creating a completely readable message and stupid youtube turned it into an almost unreadable blob of text!! SIGH!
Thanks Micah, I have 3 not working, good, nearly new ebike batteries: (52v15ah, 52v14ah, 36v8ah) plus a few small packs for a few more cells, and a spot welder, i want to combine my cells/packs to get a 72v battery for a new upgrade to an old 2014 A2B Alva+ with the 24" MXUS 3kw kit. what should i have, or do, to best build my battery. As far as shaping it, mainly, the original battery on these bikes wrapped around a beautiful strut under the rear rack, so if i could shape it to do that again that would be optimum.
I wanna rebuild this exact battery for my old honda
Bro nice battery pack. I love it
Now i understand why they charge 2000$ for these battery's
No I don't it look really easy when you know what your doing and pretty fast too !
convince and time
@@MrNobody_1618 first of all, you need to consider the basic cost of materials and battery cells. Then the manhours to build it, and then the final manufacturing that ensures minimal hazards for the user once they install the battery to an appliance. When you do it yourself you can jsut jerry rig whatever idiotic bomb you desire, but as an actual industry supplier you need to achieve certain safety standards. This all costs a ton of money, especially when you aren't a mass producing manufacturer. Price always escalates exponentially when you go up in size and complexity per unit.
What size of nickel strip did you use for the connections. Was the parallel strip the same size as the series strip ? Looking to do a similar project for perhaps a 150- 200cc equivalent. Thinking about a123 cells or using a electric car pack. Thanks. By the way did you ever finish this project ?
@@Meonlymeagain take a look at batteryhookup.com - they have a steady supply of standard new cells, plus a fast changing stock of salvage stuff from ev's and industrial recycling. Have to check frequently if you want to snag the best deals on the non standard stuff.
Thank-you, your videos have encouraged me to build my first E-bike.
Link to the bms?
yeap. That AliExpress link does not match the one he used
here you go www.alibaba.com/product-detail/20S-72V-Li-ion-Battery-Management_60742136406.html
Wat the fack
Can I just add cells to a battery pack I'm using in a parallel connection only and not doing a series connection?? Thank You
Hey! I'm a Happy Winner !!!! I send you an email, Mikah. Thanks in advance.
I'm just starting to convert my old year 80 into an electric street bike so of course I have to source some street tires and appropriate lighting but I'm looking forward to the challenge. Hopefully I win one of your books. Would probably be really usefull
One day I'll replace the two-stroke gas motor on my Paramotor with a battery pack driven electric motor.
Cool, make some videos about it! I would love to see thatà
I assume it would be a lot better feeling flying silent rather than with that noise.
With lithium ion battery it wouldn't be a nice Idea. Hopefully in future with newer battery technologies it would be possible.
Great instructional video, I’m also working/planning on building my own 72v lithium battery pack for an electric Chinese bike that I salvage but it instead had lead acid batteries which are completely dead and can’t hold a charge. Hopefully I can start this project before the summer begins.
I spent 11 mins here and he didnt even demonstrate the use of the damn thing...smh... highly disappointed Mr. Ebike, highly!
if you touch either pole youll die pretty quick.
@@joshbrock2663 no
Very good tutorial. Thanks.
1ST 😜👍
You can use thin G-10 fiberglass sheets to protect the batteries too. Cheers
He sir i am your big fan
I am mechanical engineering student and i am working on e bike project
And u r my inspiration.
I just want a live session in which i can clear some of my technical doubts
This is one of your best videos.
hello great job
Is it better to weld the series together first? and then the parallels? or does it not matter?
in some videos it's built with busbars and fuse wires, what's the difference?
I think your manufacturing is better...
Awesome video, learn a lot about battery building even thought I’m into electric skateboard. Your videos are very helpful
I like how you clearly detail all your work. You the best!
I'm so keen to build my own 72v 3000amp 40ah battery pack too. Great video.
3000amp??????😅
It is satisfying to watch this battery pack making.
Any tips on how to do 72v 54ah but 400amp or not possible working on 8000watt e-bike eventually I’d like to build my own battery for it
Same here. Looking at some 32700 cells for 6000mAh each. Should be less cells required for a 72-96v high Ah battery
the most proper explanation for the most useful process!
I love all your videos bout batteries... praying to have your book.
I had this question in your last video, but I think I know the answer now
- Hi since this is latest video I hope a get a response 😅
Basically I have a 14s 2p battery with mj1 3.5ah 10A cells with a 30a bms and 1500w motor
Basically if I give to much throttle the bms is switching the power off and I need to unplug and plug back the battery otherwise the power won't come up
Do you know why this is happening and what I could do to fix it
Thanks in advance
The battery voltage rating is:
• 14s*4.2Vmax= 58.8Vmax
• 14s*3.6Vnom= 50.4Vmax
• 14s*2.5Vmin= 35Vmin
The battery current rating is:
• 2P*10A=20A
Power (W)/Energy (V)=Current (A)
• 1,500W/58.8Vmax)=25.5A
• 1,500W/50.4Vnom)=29.8A
• 1,500W/35Vmin)=42.8A
The 14S/30A BMS rating is 50.4Vnom*30A=1,512W
To put it simply, you've connected a load greater than the system rating. Especially considering that electrical circuits are typically specified with a 25% safety margin. Yours has almost none.
Not all Battery Management Systems are created equal. While the BMS is _rated_ at 30A, it may not be up to pumping that much power on a continuous basis. Most likely, the BMS is disconnecting on over current.
What's unseen is how your batteries are being damaged. They may be *rated* at 10A, however they're *capable* of discharging at higher rates, up to and including that of a dead short. When goosing the throttle to full power, depending on state-of-charge, you're pulling between 25.5A and 42.8A from a pack rated at only 20A.
This generates a lot of heat, and heat does two things: If there's enough of it for a sufficient duration, there will be fire. However, without fire, the life of the cells is being drastically shortened.
You have two choices:
*Option A:* Decrease the motor power rating by governing it down, or replacing it with a smaller motor.
*Option B:* Go to a 3P or 4P pack, as well as a 50A BMS.
Of course, you could always keep your "foot off the gas", so to speak.
Best of luck.
Bro i am india, I am planning to make an electric car using 72 v 5 kw BLDC motor, And i am watcing so many video for making battery pack, But this is one of best video i have watched till now..
Great work..I would like be in your contact..
It so interesting to see your videos,I really wanna learn how to build my own battery when the time my E-bike battery failed.I have 48V 15 AMH on my hey bike ranger 500 w motor.Looking for up grade for high voltage and amp hour battery and bigger 750 w motor.
Nice. I am going to school to become an electrician and I just found your channel and it is very interesting. Cheers.
Good teaching 👍.thank you
How much cost 72v40ah
TY for another video . You say cell must be at the same V b4 assembly ; getting 00's cell at exactly the same V is ideal but unlikely so what is a range that is acceptable 25mv ? the cell i have purchased have 3.226v-3.236 ATM , it's going to be a couple weeks b4 i have the missing hardware and assemble the pack , i will mesure them again then , that will also tell me if the $ i spent was worth them , cheers & ride safe
Great work man... If possible can you create content for the solar battery?
Hi. Thanks for this great tutorial video.
I was wondering if its easier to build what you did here using 9v batteries. What are the obstacles that you will come across with building a pack with 9v batteries?
Wow I have no idea how I ended up here, but that was pretty entertaining. Im used to only using 1 18650 cell in flashlights. Now to see so many all wired up together was cool!
I have a 48v 1000w rear motor hub in which I'm using 60v30a(16s10p) to
push it. The problem is that it's getting hot and, I guess, the magnets
are swelling up(expanding) and causing the motor to seize up. Once it
cools it will spin again. What's going on? Great vids by the way
I should really get one of those Arduino spot welders... getting tired of soldering batteries.
Hi I am waiting on your book now and can't wait to read it. Love your work.
You make it look easy...what was the total cost of this battery?
Looks like you tore some of the battery protective casings when inserting them in the holders seen middle of battery around 3:00 of video the heat shrink is all wrinkled. I am thinking this might be a potential failure point if the heat shrink fails and have some leakage. the rest of the steps seem well done. cool project! good work
Great 1 step closer to the finished bike!
Finally bro a 72V battery pack built. Thank you ! Would be nice to see you built a 72V using the Vruzend kit.
I can't thank you enough for these videos, just picked up your book ultimate DIY and just finished my build, thank you so much Micah!
This was awesome Micah. I have an ONYX RCR with a 72v setup, been thinking about making a battery for it eventually. Really excited to see your motorcycle progress.
Cleaning out a tool crob in classroom we moved to I found a Razor e500s frame. Cannot wait to get started.
Great to see an update on the e-bike! Merry Christmas dude.
Didn't know about the blue heat shrinking stuff. Thanks for the informative video!
Shouldn't the BMS be outside of the battery pack? won't shrinkwrapping it in with the batteries over-heat it? I'm new to the channel and don't know how hot these will get. Looks cool though. I was considering buying a Zero FX this summer but now I'm reconsidering.
Question. New to doing packs. You do series first, then you do parallel. Why not do parallel, then connect the parallel blocks in series? Wouldn't that be less welding as you would only have 2 connection from block to block. To me, it looks like you built 140 cells in series, what am I missing :)
I am brand new at DIY lithium battery building. I’m still quite confused about most aspects of the process. I think I need to get a hold of your book on the subject. Thank you for how well you present information.
One thing that scares me about lithium is its instability at high (but not impossible) temperatures, under the sun or while charging. There's some precaution to add to avoid any danger?
Great Video, To the point & detailed, & Skipping the waffle that other people include.
Weight of completed battery? is it 12kg?
Why do you use Cris-Cross of nickel strips? One wider nickel strip could weld to 24 batteries ( or 10 & 14) , thus halving the number of spot welds? Minute 6.38 in the first row of 2nd half pack, there are 2 groups of 3 cells , a change from the general pattern . Is there a reason?
Also If you are ever considering building one of these and cutting corners and just soldering with a $12 iron and wire, think again. When you finally get the connections right after 14 hours of struggling they will come apart during your travels and you will kick yourself, have to rip the whole battery open and redo until you finally just get fed up and buy a spot welder. Take it from me I tried to cut corners and it cost me days of extra work and extreme frustration. Time is as important as money when building these things
What about heat dissipation? And short protection? You know if something goes wrong that’s allot of burn time there. Heat shrink is nice but not puncture proof. Obviously you are experienced with battery packs and I’m a noob. So could you explain your thought process on safety please.
Nice build pal I'm looking at making one for my mtb bike
I would be uncomfortable with those wired connections between the top and bottom face of the pack resting directly against the inner folded connection strip. If one of those wires rubs out from the vibration, wouldn't it short across both layers of cells?
OMG... Seems simple. I have to watch it many times, plus the BMS clip. Thanks
Bought your ebike book. Watched many of your videios. Liked & subscribed and have really learned a lot. Building folded 36V/20.4AH/10S6p ebike battery to convert my existing mountain bike to front drive ebike. One question on this video. The white insulated wire you used as parallel connector near end looks like dual 14 Gauge lamp cord. Shouldn't it be 10-12 gauge for the amount of current your pack is going to deliver?
Great video. With the high cost of a e-battery this is very informative as long as I keep my wire straight!
A good tip to customize blue shrinking tube is that you can glue them together with superglue to create really big tubes or custom shapes. Note that the superglue won't release when hot air is applied l. Happy building!
I really wonder if packing the BMS and its heat sink into the heat shrink plastic is a good idea...
Nice video, would love to build a 72v 100ah battery pack for a E motorcycle
Really nice sir! Is there any simple item to make battery? Dreaming to bulid special battery on my dyu1 lol
Awesome video! That looks really professional, like it was made in a factory!
Hello nice vidéo
I think IS better to do diy then buy on shop but very very interesting ?
Oh much cost all ?
It looks all professional. But there is one flaw: at 7:55 you run the wires over the bare strips?
LG MJ1 cells go for around 5 dollars. 240 cells is 1200 dollars. If you get 1000 charge cycles that's 1.20 dollars per charge. Those old Hondas get very high mileage and range isn't an issue because of gas stations. Is there a goal beyond making an electric motorcycle?
Cool project. I want to see that Honda go
Can you text me the online shopping centre where you bought the 18650 battery .Please
Also the spacer you have used.
Amazing job. Do you know if it is possible to buy Lithium batteries produced in Europe?
Thanks for running a new battery build Micah once I get a hold of my E-0bike i hope to build a common spare battery or just build a bigger Amp/h battery by connecting them in series.
I need that DIY LITHIUM BATTERY book. I NEED IT!!!!