EBike Battery Pack || DIY or Buy || Electric Bike Conversion (Part 2)

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  • เผยแพร่เมื่อ 28 เม.ย. 2018
  • Best PCB prototyping house ($2 for 10 boards): jlcpcb.com
    Previous video: • How circuit breakers c...
    Electric Bike Conversion (Part 1): • Make your own Sensored...
    Battery Type Comparison: • Battery Type Compariso...
    Make your own Li-Ion Battery Pack: • Make your own Li-Ion B...
    Battery Spot Welder (CD Welder): • Battery Spot Welder (C...
    Facebook: / greatscottlab
    Twitter: / greatscottlab
    More project information (pictures, parts list,.....) on Instructables: www.instructables.com/id/DIY-...
    The spot welder that I used in the video: www.keenlab.de/index.php/port...
    www.keenlab.de/index.php/prod...
    Parts list (incomplete, see Instructables for more, affiliate links):
    Aliexpress:
    26x INR18650-25R: s.click.aliexpress.com/e/_dY2...
    13x Spacer: s.click.aliexpress.com/e/_dVZ...
    7mm x 0.3mm nickel ribbon: s.click.aliexpress.com/e/_d6k...
    13s 20A BMS: s.click.aliexpress.com/e/_BfZ...
    10 AWG Wire: s.click.aliexpress.com/e/_dYe...
    Ebay:
    26x INR18650-25R: rover.ebay.com/rover/1/711-532...
    13x Spacer: rover.ebay.com/rover/1/711-532...
    7mm x 0.3mm nickel ribbon: rover.ebay.com/rover/1/711-532...
    13s 20A BMS: rover.ebay.com/rover/1/711-532...
    10 AWG Wire: rover.ebay.com/rover/1/711-532...
    In this episode of DIY or Buy I will show you how to create a proper EBike battery pack. The main components for the build are Li-Ion cells, nickel strips and a BMS. At the end of the project I will then conclude whether DIYing your own battery pack is cheaper than buying a premade one.
    Thanks to JLCPCB for sponsoring this video
    Visit jlcpcb.com to get professional PCBs for low prices
    Music:
    In the Hall of the Mountain King, Kevin MacLeod
    2011 Lookalike by Bartlebeats
    Killing Time, Kevin MacLeod
    (incompetech.com)
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ความคิดเห็น • 1.3K

  • @-MrDontCare-
    @-MrDontCare- ปีที่แล้ว +62

    That feeling you get when you made something, and it works is "priceless".

    • @panospapadimitriou3498
      @panospapadimitriou3498 11 หลายเดือนก่อน +1

      i simply aded a switch cables battery clamps and a fuse with a converter .. i even learned that the one side of the converter has different stats when work.. melted some fuses . ruined some solders ... was epic ..
      .. when i was 8 . 26years ago my grandpa used to let me play with pcbs and even solder ,, burns and fumes didnt stop me!!!! hope my motivation returns !

    • @nicewhenearnedrudemostlyel489
      @nicewhenearnedrudemostlyel489 4 หลายเดือนก่อน +1

      I think it's actually priceless, because the feeling is completely separate from the cost. Which is not what quotations adds to the sentence... for anyone that needs to hear that.

    • @-MrDontCare-
      @-MrDontCare- 4 หลายเดือนก่อน

      @@nicewhenearnedrudemostlyel489 You are correct, I have no Idea why I added quotations. 😅

  • @francishosey551
    @francishosey551 6 ปีที่แล้ว +9

    THE best “how to set up” battery pack video out there! I spent years clarifying and watching other ppl do it! You won’t BELIEVE how many ppl don’t tell you the orientations the batteries or the voltage. They just say “oh spot weld or soldier”

  • @jesusdavidcardenasangulo7955
    @jesusdavidcardenasangulo7955 3 ปีที่แล้ว +10

    I really admires that passionate way to explain and recreate experiments like this one.
    Keep going in that way mate!

  • @blubbspinat9363
    @blubbspinat9363 6 ปีที่แล้ว +8

    I began refurbishing ebike batteries a while ago and figured it can be quite a profitable business. That welder you got, appears quite nice and works a lot better than many readymade ones that are available for cheap.

  • @mollygrubber
    @mollygrubber 5 ปีที่แล้ว +17

    Your camera work is stellar. I wish more people on YT were this good.

  • @Speeder84XL
    @Speeder84XL 6 ปีที่แล้ว +3

    Very nice!
    Finally a FIY or BUY video that really makes sense - most of the other ones only show what was the best alternative for you (the same doesn't apply to everyone - it depends on your knowledge and budget).

  • @JamieBainbridge
    @JamieBainbridge 6 ปีที่แล้ว

    I like how you make the ads interesting. I have no idea about PCB design but I like hearing random little facts. Clever.

  • @josech5743
    @josech5743 6 ปีที่แล้ว

    Man this video was awesome ,the best in months, you explained everything flawlessly.. Thanks for the video !!

  • @dj_paultuk7052
    @dj_paultuk7052 6 ปีที่แล้ว +574

    At least with a DIY pack build you know that you have good quality cells. Not some cheap un-named brand with no capacity.

    • @kael13
      @kael13 6 ปีที่แล้ว +1

      Can make sure you buy a pack that names the cells it uses?

    • @blenderixacadomenix4302
      @blenderixacadomenix4302 6 ปีที่แล้ว +16

      and made out of bad Chineseium materials

    • @JankyShack
      @JankyShack 6 ปีที่แล้ว +6

      at that point why don't you just use a gas engine to drive the wheel? lol

    • @5thDragonDreamCaster
      @5thDragonDreamCaster 5 ปีที่แล้ว +1

      I've got a lead-acid battery.

    • @rosonowski
      @rosonowski 5 ปีที่แล้ว +1

      Genset trailers are a thing. I was thinking about getting a little hobby gasser and an alternator, myself.

  • @caveyak
    @caveyak 4 ปีที่แล้ว +16

    This is by far the best concise video on DIY battery packs. Well done.

    • @johnson12379
      @johnson12379 3 ปีที่แล้ว

      Is it on purpose @7:17, it's not complete yet cuz in regards to the right diagram which is in the sketch he showed @4:00 is supposed to be 3 of that 26 battery package he just created and so if I'll clarify you need 78 batteries in order to get a "48v 20ah 1000 watt battery pack"😉

    • @fiaviy.5298
      @fiaviy.5298 6 หลายเดือนก่อน

      ​@@johnson12379where did he say he wants 20Ah? He just need 20A, 5Ah.

  • @activechaos128
    @activechaos128 6 ปีที่แล้ว

    Awesome video. I've been reading up on making an ebike over the last few weeks and this video is just what I needed. Thanks!

  • @shayanirenberg3294
    @shayanirenberg3294 6 ปีที่แล้ว

    By far the best diy battery pack video on TH-cam

  • @XdewGaming
    @XdewGaming 6 ปีที่แล้ว +94

    I really appreciate your effort in these videos.
    Just one thing and this’ll be complete!, I’d really like to see a HOMEMADE MOTOR!
    Thanks!

    • @greatscottlab
      @greatscottlab  6 ปีที่แล้ว +43

      It is on my to do list

    • @XdewGaming
      @XdewGaming 6 ปีที่แล้ว +2

      @greatscott please post a link to the spot welder you got too, i get inspired by your videos and i am the the progress of making my own electric bike kit!
      Edit: i meant the one they sent you, not the diy one.

    • @thekakan
      @thekakan 6 ปีที่แล้ว

      He has posted it in the description:
      " The spot welder that I used in the video: www.keenlab.de/index.php/port... www.keenlab.de/index.php/prod... "
      The link is: www.keenlab.de/index.php/portfolio-item/kweld/

    • @XdewGaming
      @XdewGaming 6 ปีที่แล้ว

      Satwik Satpathy When i got here it was NOT there, thank you.

    • @RinksRides
      @RinksRides 6 ปีที่แล้ว

      th-cam.com/video/NFvMC3l3fGY/w-d-xo.html

  • @pradeepm6063
    @pradeepm6063 6 ปีที่แล้ว +4

    Great scott, Hi
    Thank you so much, with the help of your videos i can deeply understand power electronics
    In my opinion ,
    Without skilled hands education is useless
    Without kind heart education is dangerous
    Thanking almighty that you have both
    After watching your videos i feel that my skills are improving.
    Thank you again :) :)

  • @jondavidmcnabb
    @jondavidmcnabb 6 ปีที่แล้ว +1

    Excellent tutorial! Best on I have seen in a long time. Love the math and the data.

  • @ImmodderNation
    @ImmodderNation 6 ปีที่แล้ว +1

    I really needed this video. Making a lipo battery pack for a project but was confused about the BMS.

  • @GadgetAddict
    @GadgetAddict 5 ปีที่แล้ว +73

    The other benefit of building over buying is that you know you're getting genuine cells. As long as you buy from a reputable place anyway.

    • @samihyppia8472
      @samihyppia8472 3 ปีที่แล้ว +2

      Yea however you have to calculate that he also has to protect those cells in enclosure, to protect it from rain, rust, from shorting and whatnot.. :/

    • @michaszkopiak7412
      @michaszkopiak7412 3 ปีที่แล้ว

      @@samihyppia8472 paa÷
      !

    • @chirranjankumar3131
      @chirranjankumar3131 2 ปีที่แล้ว

      9999g ki logzgy5 hg

    • @miespost
      @miespost 2 ปีที่แล้ว +3

      I will never buy a cheaper pre made e bike battery they are all horrible I don’t care what anyone says. Ride a eBay bought bike battery daily from 100-20% charge and it will be completely shot in months! After that mistake I bought all the tools and started making my own, 13s 8.8 ah battery cost $350 including the tools spot welder soldering gun etc but I’m using very good high drain cells. Most store bought batteries can’t handle a lot of current either, my pack can handle 90 amps continuous discharge and 20 amp charge rate. Not to mention you can use 21700 cells and get better watt hour to size/cost ratio. In the long run it’s beneficial because you have the tools and ability to make any battery whenever you need to fit any device. Have a lot of lifepo4 ups upgrades in the future.

  • @henryswan1374
    @henryswan1374 6 ปีที่แล้ว +8

    this is great, i never understood how to use a BMS until i saw this, i'm using the same one as you

    • @fintonmainz7845
      @fintonmainz7845 3 ปีที่แล้ว

      He explained it so well and in only a few words.
      Great communicator.

  • @MarchandendYves
    @MarchandendYves 5 ปีที่แล้ว +2

    Thank you Scott for your detailed and clear tutorial !

  • @MrSdfghjkl2345678
    @MrSdfghjkl2345678 3 ปีที่แล้ว

    Thx for al the videos ! I followed this build and now I can cruise on my fast bike in the Netherland!

  • @thisisSherno
    @thisisSherno 5 ปีที่แล้ว +417

    I guess I'll just buy.. It gets complicated after 00:01

    • @hugh_jasso
      @hugh_jasso 5 ปีที่แล้ว +7

      Agreed lmao. Started off simple enough.

    • @rinku9612
      @rinku9612 5 ปีที่แล้ว +3

      😂

    • @rinku9612
      @rinku9612 5 ปีที่แล้ว +2

      @@lobsterbaby5302 🤣

    • @pauls5745
      @pauls5745 5 ปีที่แล้ว +8

      nooo lol. watch some more vids. quite easy, really

    • @meazy451
      @meazy451 4 ปีที่แล้ว +4

      There's better videos that make it easier to understand. But currently a diy battery is almost just as expensive to make as it is to buy

  • @ELECTRONOOBS
    @ELECTRONOOBS 6 ปีที่แล้ว +262

    Very nice as always. Do you have plans for an aluminum case for the battery pack?

    • @greatscottlab
      @greatscottlab  6 ปีที่แล้ว +99

      Not an aluminum case, but something else. Will be in the next part.

    • @unclhos
      @unclhos 6 ปีที่แล้ว +19

      I imagine he'll 3d print something.

    • @VivekSingh-og2nf
      @VivekSingh-og2nf 6 ปีที่แล้ว +2

      GreatScott! May be a 3D printed battery case.

    • @jort93z
      @jort93z 6 ปีที่แล้ว +6

      I would suggest a flame retardant filament if you 3d print something though, just in case. some of the other filaments are flamable.

    • @ravivishwakarma7803
      @ravivishwakarma7803 6 ปีที่แล้ว +2

      Electronoobs i always watch you videos

  • @tomcostello8045
    @tomcostello8045 5 ปีที่แล้ว

    Thanks for taking the mystery out of battery packs , Very precise engineering methods .

  • @PhilipStubbs
    @PhilipStubbs 6 ปีที่แล้ว

    For the similar price, but knowing that quality cells have been used, I think build should be the winner of this one. Great video again.

  • @deadbird99
    @deadbird99 6 ปีที่แล้ว +5

    Awesome video, very, very instructive! Thanks a lot!

  • @simgplusnervt4698
    @simgplusnervt4698 3 ปีที่แล้ว +9

    I think the most important is the connection to the rest of the controllers of the bike. Most of the time, the BMS of the battery needs to talk to the controller unit of the bike. Then p.ex. the display of the bike can show the state of charge (SOC).

  • @reverendgaddy2435
    @reverendgaddy2435 5 ปีที่แล้ว

    so clear and succinct. you really demystified making battery packs!

  • @jpaz3852
    @jpaz3852 4 ปีที่แล้ว

    I appreciate your ohm law approach to explain it. Very detailed, and well explained. Thank you.

  • @AdamWebb1982
    @AdamWebb1982 6 ปีที่แล้ว +10

    I think the pro with making your own pack would be making it a larger capacity to the normal ones you buy off shelf. This pack is pretty small as it is. Good start though. Also picking up second hand cells is a good way of cutting costs, although adds risk of unreliability.

    • @kevinhorstmann1435
      @kevinhorstmann1435 ปีที่แล้ว +1

      I steal the batterys from e scooters, i am rebuilding three batteries into one for my ebike. Yes this is stupid, yes it will work.

    • @frodestillingen
      @frodestillingen ปีที่แล้ว

      @@kevinhorstmann1435 No problem using used cells as long as you check them properly :) I bought a 8 channel tester/charger that tells me exact capacity of each cell

  • @GadgetEyeGuides
    @GadgetEyeGuides 6 ปีที่แล้ว +3

    I like the video. Just in case you didn't know, I thought I would make you aware of some separate options for cheaper batteries.
    A popular option in the hobbyist community is to buy lots new laptop batteries and disassemble them for cells. The cheapest option I'm aware of is going for used cells from dead laptop batteries.
    Used cells are a bit tricky as they must undergoe some tests to verify their capacity and condition. Afterwards you organize them Into a pack with similar cell capacitys.
    This is the option I went with for my personal battery, I ended up with a 14s 12p battery, it runs about 27ah. It cost me less than 100$, but a fair bit of time.
    I'm excited to see how your project turns out!

  • @AmazingDX
    @AmazingDX 5 ปีที่แล้ว

    That spot welding was so satisfying..!

  • @motopar_tech
    @motopar_tech 5 ปีที่แล้ว

    It´s the better video learning to build Li Battery. Congratulation, GratScott!!!

  • @amazingcreativitywork1438
    @amazingcreativitywork1438 5 ปีที่แล้ว +4

    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

  • @LazerLord10
    @LazerLord10 6 ปีที่แล้ว +11

    How would you compare this kind of pack to one based on RC lithium-polymer battery packs? I'm going to be working on an electric scooter project soon, and I was aiming for li-po batteries primarily because of their cost and relative ease of use.

    • @JankyShack
      @JankyShack 6 ปีที่แล้ว

      lithium-polymer will be almost the same as far as the math goes compared to lithium ion. If you used packs you would probably want to use 3x 11.1v packs and 1x 14.8v pack in series to get to 13s.

    • @wujekcientariposta
      @wujekcientariposta 3 ปีที่แล้ว +2

      Lipo isn't widely spread despite it's large current advantage in evs cause it has less charging cycles of longevity and is more volatile. Both li-ion and lifepo4 can supply enough current at any reasonable capacity, and lifepo4 has much larger range of operating temperatures.

    • @ahah1785
      @ahah1785 3 ปีที่แล้ว

      Do not use lipo is a bomb waiting to set your house on fire. save a few bucks loose your house gg. Use lifepo4 only.

    • @davidelliott5843
      @davidelliott5843 3 ปีที่แล้ว +1

      LFP is the safest chemistry but needs a larger volume. Lithium polymer has the best energy capacity so is fine for small gadgets. It is too sensitive for heavy duty power especially with vibration in a bike or scooter. Not safe. Don’t go there.

    • @christopherlastname7638
      @christopherlastname7638 3 ปีที่แล้ว

      @@ahah1785 you're fake news!

  • @dafalzonAUS
    @dafalzonAUS 2 ปีที่แล้ว

    DIY is always the winner, learning and gaining experience, anyone can buy

  • @saygnileri1571
    @saygnileri1571 4 ปีที่แล้ว

    Thank u for writing down all required equations. This is really useful!! Thanks

  • @aadharshaansh8108
    @aadharshaansh8108 4 ปีที่แล้ว +5

    add a 3d printed enclosure for the kweld

  • @antonnpn9063
    @antonnpn9063 6 ปีที่แล้ว +82

    You will find 1kw enjoyable for a brief moment. Then you want more. You will probably build an 5-10kw bike and enjoy it for a moment too. Then you will move into the heavier stuff and beat all the 450cc on the street while realising that you have spent 100x more money on the EV wave than the original budget. But in the end of the day it will all be worth it!

    • @yashveerthakur7265
      @yashveerthakur7265 6 ปีที่แล้ว +2

      true AF!

    • @davey2k12
      @davey2k12 5 ปีที่แล้ว +3

      We need solid state batteries Tesla gonna start using if they not already
      We get the shit overstock or crap batches
      they pay bulk prices and get all good stuff shit bags 😂😂

    • @pauls5745
      @pauls5745 5 ปีที่แล้ว +1

      lol. scale that down to 350watt entry level motors and believe me, more than 48v 1500W is scary fast on a bike

    • @williamschmitt6487
      @williamschmitt6487 4 ปีที่แล้ว +1

      Just use a gas bike...

    • @gabrielko2147
      @gabrielko2147 4 ปีที่แล้ว +1

      @@mtuz8356 thats not really flying tho...

  • @GogoTech
    @GogoTech 6 ปีที่แล้ว

    This was the video I am looking for my eboard thanks a lot finally I watched your old one a couple times but this one is the best

  • @jonnupe1645
    @jonnupe1645 6 ปีที่แล้ว

    I always love the camera work in this show.

  • @rafaelmohl3293
    @rafaelmohl3293 4 ปีที่แล้ว +8

    6:55 I guess those conections were serious

  • @zanpekosak2383
    @zanpekosak2383 6 ปีที่แล้ว +3

    10:05 holy shit look at that spark!🤷🏻‍♂️🤣😁😎

  • @slartybartfarst9737
    @slartybartfarst9737 ปีที่แล้ว

    By far the best explanation and video work Ive ever seen on E bike battery creation and function coupled to an unbiased conclusion of price, very business like, very professional, thank you.

  • @wimwiddershins
    @wimwiddershins 6 ปีที่แล้ว

    Great stuff! That spot welder is tempting.

  • @EngineeringNS
    @EngineeringNS 6 ปีที่แล้ว +3

    Be careful with those chiese lab bench power supply's, sometimes the voltages becomes wrong after use--Then your circuit suddenly fries and you don't know why. When you check power supply voltage, the display says 4.2v and its actually 6v. It's pretty cool.

  • @jakats9139
    @jakats9139 6 ปีที่แล้ว +32

    DIY is a clear winner if you allready have the 18650 cells

    • @theEskalaator
      @theEskalaator 6 ปีที่แล้ว +1

      Do you have 30 (or 60 in bigger packs) batteries just lying around? I have some from old laptop batteries, but I can't use them together of course..

    • @dege10000
      @dege10000 6 ปีที่แล้ว +3

      Yes you can, most are just a pack of 4 to 8 18650, I take "dead" (usually the managing circuit fails or a cell over discharges) laptop batteries and use them for diy power banks or other proyects.

    • @theEskalaator
      @theEskalaator 6 ปีที่แล้ว +2

      Since some of the cell may have different parameters after being in "dead" battery, you should check their capacity and ESR first. You can of course use them to create something like a powerbank, but If you would use other types from more batteries, it would be very bad. Also you would need 30, or 60 the same cells with same parameters to create something like this battery. You can not just solder any cell to each other.

    • @jakats9139
      @jakats9139 6 ปีที่แล้ว +1

      Adam Grufík if they are diffrent parameters then you use bms or try to manage get same capacity bunch for one group of cells

    • @dege10000
      @dege10000 6 ปีที่แล้ว

      Of course, but when you can haul them almost by the literal ton out of tech repair shops you are bound to pile a nice amount of batteries with the same parameters. At least 7 out of 10 will be ready to use, 1 will need some restoring and the other 2 will be dead

  • @tonythediyer8537
    @tonythediyer8537 6 ปีที่แล้ว

    As usual, well done. Next video we need to see you riding this bike!

  • @88ElevenShop
    @88ElevenShop 3 ปีที่แล้ว

    That's some great content and production value. That kit looks great.

  • @IrishSkruffles
    @IrishSkruffles 6 ปีที่แล้ว +5

    You can't trust the cells you get on ebay but, labour cost is a major disadvantage (unless you class it as a hobby then its worthwhile)
    One point on the BMS, what's the balancing current? it's probably not very high.. so I'm wondering if there was a more severe voltage difference in the cells would the little passive balancing circuit cope with the charging current?

    • @michaelschalk4718
      @michaelschalk4718 6 ปีที่แล้ว

      Skruffles Balancing current for most BMS is typically under 50mA

    • @IrishSkruffles
      @IrishSkruffles 6 ปีที่แล้ว

      Yeah that's what I thought, even at 100mA I'd be a bit wary of some cells overcharging when series charging the pack.. I suppose some manual checks every now and then would suffice

    • @Pushyhog
      @Pushyhog 5 ปีที่แล้ว

      Germany batteries

  • @TheVexCortex
    @TheVexCortex 6 ปีที่แล้ว +8

    You want to match battery pairs by their internal resistance, not their out-of-the-box charge voltage.

    • @zachburke8906
      @zachburke8906 6 ปีที่แล้ว

      TheVexCortex i didn’t know this, I also have never tried to measure a batteries resistance.
      Do you just measure it like a normal resistor?

    • @TheVexCortex
      @TheVexCortex 6 ปีที่แล้ว +1

      You need a special meter to measure it, if you hook it up to a multimeter, you will probably kill your multimeter. Mine is built in to my charger: www.amazon.com/Version-Digital-Battery-Discharger-Temperature/dp/B00ZGZZ40K/ref=sr_1_32?ie=UTF8&qid=1526094888&sr=8-32&keywords=lithium+charger
      www.walmart.com/ip/Tenergy-5-in-1-Intelligent-Cell-Meter-Capacity-Checker-Battery-Balancer-Battery-Discharger-Internal-Resistance-Tester-ESC-Servo-PPM-Tester/179864013?wmlspartner=wlpa&selectedSellerId=2240&adid=22222222227056692896&wl0=&wl1=g&wl2=c&wl3=233956535514&wl4=pla-384625138979&wl5=9022129&wl6=&wl7=&wl8=&wl9=pla&wl10=113146105&wl11=online&wl12=179864013&wl13=&veh=sem should do the job though.

    • @shumymikaball
      @shumymikaball 5 ปีที่แล้ว +1

      Measure voltage drop in a resistor and do the math.

  • @RamSees13
    @RamSees13 3 ปีที่แล้ว

    amazing video. i was just drawing up plans to do this myself and only afterwards did i find this incredible video. in my case i did a comparison of the diy battery bank to the retail value for my ebike and it saves me nearly $750USD. jeez louisee

  • @quique18c
    @quique18c 6 ปีที่แล้ว

    Gotta tell you that today i made an 80$ order + some LCSC smd things, thank you for the continuous quality reviews! gotta check it out for myself!

  • @Newjorciks
    @Newjorciks 6 ปีที่แล้ว +164

    To be fair, if you used the same cells that those battery packs have, it would probably turn out much cheaper. You can't know what cells those have, could be some cheap Chinese ones.

    • @bartoszrosadzinski2430
      @bartoszrosadzinski2430 6 ปีที่แล้ว +19

      Which means that the pre-made battery pack would be much more expensive in the long run.

    • @rexczi6299
      @rexczi6299 6 ปีที่แล้ว +7

      Buy cheap cells from trustworthy sellers on ebay - $1 pr cell at its cheapest

    • @Newjorciks
      @Newjorciks 6 ปีที่แล้ว +16

      Have you actually done measurements on what is their real mAh? Do you know how long/how many cycles it will last? No. With a good brand one you can pretty much know it won't give out after 10 cycles. Chinese stuff has way less quality control and even same batch batteries can have varying capacity or life.

    • @rexczi6299
      @rexczi6299 6 ปีที่แล้ว +4

      Newjorciks tru but just like the chinese knife market, it has gone into a new world... Much better than before.. Tbh its safe to buy almost any 18650's.. just not the 9800mAh cells lll

    • @MichaelBartonMTS
      @MichaelBartonMTS 6 ปีที่แล้ว +13

      All of it is from China. There is quality Chinese made products. And cheaply made products. simple as that I dislike when people say "cheap eBay crap" or "cheap Chinese stuff" What did you expect for little $

  • @albertox0404
    @albertox0404 6 ปีที่แล้ว +32

    DIY BMS or BUY? 😁

    • @greatscottlab
      @greatscottlab  6 ปีที่แล้ว +16

      I have it on my to do list but that will take a while.

    • @WarrenGarabrandt
      @WarrenGarabrandt 6 ปีที่แล้ว +4

      This please! I actually really want to make my own BMS so I can do regenerative breaking and have different voltage outputs for different things. (lights, traction motor controller, etc.)

    • @MohamedMagdi-iv8og
      @MohamedMagdi-iv8og 5 ปีที่แล้ว +1

      @@WarrenGarabrandt me too

    • @WarrenGarabrandt
      @WarrenGarabrandt 5 ปีที่แล้ว +1

      @@greatscottlab Can you show how to do BMS for lead acid batteries? I know most people just slightly overcharge the highest cells so that lower cells can get a charge, but that damages sealed batteries like gel cells.

    • @alrado4167
      @alrado4167 5 ปีที่แล้ว +1

      buy

  • @Tiger1x1
    @Tiger1x1 3 ปีที่แล้ว

    I appreciate your honest review and the way of explaining things..

  • @edslab5383
    @edslab5383 6 ปีที่แล้ว

    As always an amazing video. I really enjoy watching your videos. You're so creative.

  • @davey2k12
    @davey2k12 5 ปีที่แล้ว +8

    I'd of doubled that pack it wouldn't last long on a 500w hub

  • @TheRealRaZtar
    @TheRealRaZtar 4 ปีที่แล้ว +6

    Would getting 21700 batteries be more beneficial?

    • @Patek007
      @Patek007 4 ปีที่แล้ว

      Tigoo yes

  • @nitunitu9911
    @nitunitu9911 6 ปีที่แล้ว

    Dear Scott great basic introduction ,its include every thing for the basic to explore,thanks

  • @anoniem012
    @anoniem012 3 ปีที่แล้ว

    One of my favorite channels.

  • @nootgourd3452
    @nootgourd3452 4 ปีที่แล้ว +75

    5:40 "The n***a ribbon"

    • @jm036
      @jm036 4 ปีที่แล้ว +7

      He's fucked up the pronounciation so many times, it's hilarious.

    • @MilesBellas
      @MilesBellas 4 ปีที่แล้ว +8

      German / Swedish word
      his pronunciation is therefore accurate
      nickel (n.)
      "whitish metal element, 1755, the name was coined in 1754 by Swedish mineralogist Axel von Cronstedt (1722-1765) from shortening of Swedish kopparnickel "copper-colored ore" (from which it was first obtained), a half-translation of German Kupfernickel, literally "copper demon," from Kupfer (see copper) + Nickel "demon, goblin, rascal" (a pet form of masc. proper name Nikolaus (compare English Old Nick "the devil;" see Nicholas). According to OED, the ore was so called by miners because it looked like copper but yielded none."

    • @VVVVV99611
      @VVVVV99611 2 ปีที่แล้ว

      cANcELleD

  • @geniusaur
    @geniusaur 6 ปีที่แล้ว +34

    you should have a look at the high capacity rc batteries on hobbyking, you get alot more bang for your buck there, ebike specific batteries are ridiculously expensive

    • @Z0DI4C
      @Z0DI4C 6 ปีที่แล้ว +7

      Depends what you're going for. Hobbyking Multistar cells weigh 40% more for the same capacity compared to 35E's, and many new 18650's do cost less.

    • @tiborkiss9186
      @tiborkiss9186 6 ปีที่แล้ว +1

      Well, currently on Hobbyking: 10s 10A lipo pack (20C discharge, 2C charge) - 40 EUr, incl. shippment to Europe. I think it is a quite good deal.

    • @_Piers_
      @_Piers_ 6 ปีที่แล้ว

      Tibor Kiss Hey, could you put a link to that battery, I can't find :(

    • @jeb5032
      @jeb5032 6 ปีที่แล้ว +4

      any cell has a tendency to puff when used incorrectly... Ive had some of my multistar cells for YEARS, never had one puff yet. i have the crazy big 16ah 6s and 4s packs and multiple smaller quad and plane batteries, your using them wrong if they are puffing mate... dont spread rumours...

    • @eduardoavila646
      @eduardoavila646 6 ปีที่แล้ว

      Or you know bike/car batteries could be used too, with some circuitry together

  • @shayanirenberg3294
    @shayanirenberg3294 6 ปีที่แล้ว

    All hail the greatscott by far the best electronics youtuber with the most soothing voice I ever heard. Can you please read me bed time stories

  • @barrycrowder
    @barrycrowder 6 ปีที่แล้ว

    Nice video. I just replaced a bad cell in my Prius battery, and as far as I can tell, it works in a very similar manner.

  • @simonfox_8559
    @simonfox_8559 6 ปีที่แล้ว +3

    What is the advantage of connecting the battery holders in series as opposed to parallel? How does this affect current and voltage?

    • @jort93z
      @jort93z 6 ปีที่แล้ว +4

      thats simple. If you connect them in parallel you'll be able to draw a higher current (rated current of the cell)x(number of cells) and the voltage will be the same as a single cell (so 3.0-4.2 volts), and if you connect them in series you'll get a higher voltage (voltage of one cell)x(number of cells).
      Since his device only works at over 40 volts you'll have to connect at least 10 in series to get a suitable voltage.
      If you wanted to build a spotwelder with them(like the K-weld he showed) for example, you'd connect them in parallel instead.
      You can also combine that like he did. so that means you have groups of 2 cells in parallel, which gives you double the maximum current, and then put those groups in series, which gives you a higher voltage.
      Thats the electronics basics. Like, first lesson basics.

    • @simonfox_8559
      @simonfox_8559 6 ปีที่แล้ว +1

      I did not know that the configuration of the battery spacers was so important!

    • @jort93z
      @jort93z 6 ปีที่แล้ว +1

      The spacers? i thought you were talking about the nickel strips lol.
      I guess the spacers are connected in both parallel and series.

    • @simonfox_8559
      @simonfox_8559 6 ปีที่แล้ว +1

      What is the difference? How do those spacers affect voltage and current?

    • @simonfox_8559
      @simonfox_8559 6 ปีที่แล้ว +1

      Are you sure....

  • @Videoswithsoarin
    @Videoswithsoarin 5 ปีที่แล้ว +7

    PCB for only $2 is deceiving. shipping is minimum $10

  • @goldbunny1973
    @goldbunny1973 5 ปีที่แล้ว

    Beautifully clear video. Very informative and well planned & presented.

  • @luisrovai
    @luisrovai 5 ปีที่แล้ว

    Great video, as always! Greetings from Brazil

  • @skodbolle
    @skodbolle 4 ปีที่แล้ว +8

    5:37 Did he just call the ribbon the N-word? :O

    • @IMDYT420
      @IMDYT420 4 ปีที่แล้ว +1

      5:40

    • @MrSummitville
      @MrSummitville 4 ปีที่แล้ว +1

      NO! He said, "Nickel ribbon"

  • @soulsbreaker
    @soulsbreaker 6 ปีที่แล้ว +5

    Boah Alter! This is BS
    You bought a 3d printer when I got my first 3d printer, I thought it's all a coincidence.
    Then I start panning an e-bike.
    I start planning my battery pack and sketching up the pack on CAD.
    And then you stat making it too!
    Stop it! Hahaha
    All jokes aside, love the video and the coincidence.
    Might as well show you what I did to get around the task.
    I build a sport welder from a scrap PSU transformer haha
    And 3d printer. My battery pack

  • @Ultralordbro
    @Ultralordbro 6 ปีที่แล้ว

    this could not have come at a more perfect time. The same concepts here for a batter pack could be taken to more than just an e bike and i have been looking for a good explanation that really broke the process down for using li-ion cells.

  • @Amir-291
    @Amir-291 5 ปีที่แล้ว

    Thumbs up man! what a great video! Well done! Impressed!

  • @Hunter_Bidens_Crackpipe_
    @Hunter_Bidens_Crackpipe_ 6 ปีที่แล้ว +35

    You don't need 20A cells anymore if you are only doing 2p...
    Whats the point of calculating amperage for 1p then buying 2p?
    30q would of been perfect, more capacity and possibly cheaper.

    • @Wojtkacy
      @Wojtkacy 6 ปีที่แล้ว +8

      the battery pack he made is only 240Wh, it's really small... he could have used batteries with 5A max current draw, but make 13S6P pack for at least 500Wh capacity (with 2000mAh batteries...). It would have been cheaper and of course it would last much longer

    • @KevinDay
      @KevinDay 6 ปีที่แล้ว +16

      Running batteries at less than their maximum C rating is more efficient. The more current you push through them, the more (I^2)R losses you incur, therefore there is more wasted capacity, and more heat reducing the longevity of the cells. It's never bad to have a good safety margin, unless you are trying to "get away with" as few pennies spent as possible.

    • @Wojtkacy
      @Wojtkacy 6 ปีที่แล้ว

      Kevin Day Sure, but in the end 13S6P pack with 2000mAh 5A cells will do better than 13S2P 2500mAh 20A in my opinion. And it can be cheaper as well.

    • @vgamesx1
      @vgamesx1 6 ปีที่แล้ว +3

      Nacho Mendía Heavier than the four Lead Acid batteries you would typically use with a bike? Yeah I definitely not... Even if you went for small 5Ah batteries they would weigh about 4lb each so 16lb total and even heavier at a more useful capacity like 7-9Ah, whereas an 18650 will weigh about 50g per cell, so that would be 8.6lb for a 13s6p pack which is considerably lighter.

    • @KevinDay
      @KevinDay 6 ปีที่แล้ว

      Wojtek Kamiński Yeah, I meant to mention in my comment, I'm not saying that his solution was the best one, just that there is at least SOME reason to do the calculations for 1P and use 2P.

  • @luizz1997
    @luizz1997 6 ปีที่แล้ว +64

    Why you stopped posting links to aliexpress?

    • @greatscottlab
      @greatscottlab  6 ปีที่แล้ว +87

      Was not worth it

    • @franciscopen1681
      @franciscopen1681 6 ปีที่แล้ว +6

      GreatScott! Wait why, because aliexpress products are unreliable?

    • @DavidScheiber
      @DavidScheiber 6 ปีที่แล้ว +56

      no, likely because spending the time to hunt the product down on multiple websites is time consuming

    • @TheKrogon
      @TheKrogon 6 ปีที่แล้ว +2

      real mvp

    • @0xCAFEF00D
      @0xCAFEF00D 6 ปีที่แล้ว

      iwantitpaintedblack looks like someone else can do it for you ^. ^

  • @WillSmith-zk8hh
    @WillSmith-zk8hh 5 ปีที่แล้ว

    Always liked your work! Thanks for sharing!

  • @minjiguan3248
    @minjiguan3248 ปีที่แล้ว +1

    Great video! Make it easy for beginners to understand.thanks for sharing!

  • @dustycrustyhomelessman1648
    @dustycrustyhomelessman1648 5 ปีที่แล้ว +5

    5:41
    the *what*

  • @deepakjoshi6242
    @deepakjoshi6242 6 ปีที่แล้ว +18

    Sir, why don't you make a video on " how to design schematics and custom PCB using easyEDA ".
    I know you've already made a video on easyEDA but it doesn't help at all in working on it.
    I'm really not able to understand which tool is why and which tool is where and tool I need ... What its name..??
    Please it will be really helpful.
    Thank you..
    Respect🙏 and appreciation👏 from India🇮🇳🇮🇳.

    • @greatscottlab
      @greatscottlab  6 ปีที่แล้ว +11

      I will make such a video when the time is right.

    • @deepakjoshi6242
      @deepakjoshi6242 6 ปีที่แล้ว +7

      GreatScott! Will be waiting eagerly..😊

  • @Usasb4488
    @Usasb4488 2 ปีที่แล้ว

    I like how you give as school lessons thx and God bless you my brother 🙏

  • @marcoantoniomunizmancilla5828
    @marcoantoniomunizmancilla5828 4 ปีที่แล้ว

    my congratulations for who is back your channel all is a great job. thank you my big LIKE FOR YOU

  • @julianblacksmith8539
    @julianblacksmith8539 10 หลายเดือนก่อน +2

    Isn't LFP better

    • @luongmaihunggia
      @luongmaihunggia 2 หลายเดือนก่อน

      Safer but lower energy density

  • @jakegarrett8109
    @jakegarrett8109 5 ปีที่แล้ว +17

    5:40 so sounds wrong...

    • @thehatedones5153
      @thehatedones5153 4 ปีที่แล้ว +1

      ni**a ribbon

    • @Detura
      @Detura 3 ปีที่แล้ว

      Glad someone else heard it too lmao

  • @urtiaga71
    @urtiaga71 4 ปีที่แล้ว

    Awesome video, you are very clear and full of information. Congrats and Thanks!

  • @EDUARDOCAPANEMAecapanema
    @EDUARDOCAPANEMAecapanema 5 ปีที่แล้ว

    Now this is a neat job! Congratulations.

  • @hamzaezio1784
    @hamzaezio1784 6 ปีที่แล้ว +5

    I have bought 200 li-lon battery for 5 dollars XD in a garage sell

    • @Rocan0
      @Rocan0 6 ปีที่แล้ว

      Hamza Ezio Argh... for $20 Can I have 35 cells ? x)

    • @zachburke8906
      @zachburke8906 6 ปีที่แล้ว +3

      Time to start going to garage sales.

  • @samuelsparks8114
    @samuelsparks8114 6 ปีที่แล้ว +15

    But with only 5Ah and drawing 10Amps you will only have 30 minutes of charge...

    • @greatscottlab
      @greatscottlab  6 ปีที่แล้ว +21

      True. But that is why I will do testing in part 3.

    • @gelu88
      @gelu88 6 ปีที่แล้ว +4

      Samuel Sparks also, the way to use these is not continuously at full power. You use it as a pedal assist. The current draw is much less and you get hours of use, while still dramatically reducing the difficulty of pedaling.

    • @curtbeers1606
      @curtbeers1606 6 ปีที่แล้ว +2

      Can it charge when coasting? Like some Hybrid cars do?

    • @MsSomeonenew
      @MsSomeonenew 6 ปีที่แล้ว

      30 minutes of full power, usually you don't drive around like that.

    • @DFX2KX
      @DFX2KX 6 ปีที่แล้ว

      @Curl Beers
      That depends mainly on the speed controller, some carry regenerative braking, though regenerative coasting isn't something they normally do.

  • @bananaslug5278
    @bananaslug5278 6 ปีที่แล้ว

    i am also in the process of making e bike... except for the difference that i dont have money and have to use alternator as motor and some gel or lead batteries, but still can as always take some new knowledge from your videos . Keep up the good work!

  • @michaelweiss6163
    @michaelweiss6163 4 ปีที่แล้ว

    Very well done. Very easy to follow. Very thorough and informative. Keep it up

  • @Asu01
    @Asu01 6 ปีที่แล้ว +33

    I'm early, let me tell you a joke.
    An Indian who obsessed and keep asking for USB soldering iron.

  • @DavidScheiber
    @DavidScheiber 6 ปีที่แล้ว +4

    so diy if you feel like it?

  • @officialm0016
    @officialm0016 5 ปีที่แล้ว

    Such a video creator man...perfect awesome ...your work is amazing man...

  • @EVLS10
    @EVLS10 2 ปีที่แล้ว +1

    Big benefit to DIY is knowing your pack is solid. Buying cheap modules can have poor results. Definitely a good idea to crack open what you bought if you can to see how good of a job they did inside.

  • @NickTheGreek5109
    @NickTheGreek5109 6 ปีที่แล้ว +39

    5:32 "nigga ribbon" :P

    • @nrdesign1991
      @nrdesign1991 6 ปีที่แล้ว +10

      even "worse" at 5:40 lol

    • @Krspy2
      @Krspy2 6 ปีที่แล้ว +1

      Lmao had me dying

    •  6 ปีที่แล้ว

      I was sure I wasn't the only one who heard it 😂😂

    • @edism
      @edism 6 ปีที่แล้ว +3

      Sounded like nickel to me, I guess you just heard what you wanted to hear.

    • @apex3d595
      @apex3d595 5 ปีที่แล้ว

      LOL!

  • @moustafamohsen
    @moustafamohsen 6 ปีที่แล้ว +8

    why didn't u show the bike on the road

    • @greatscottlab
      @greatscottlab  6 ปีที่แล้ว +33

      Part 3?

    • @Nicksperiments
      @Nicksperiments 6 ปีที่แล้ว +4

      Because it’s just a battery pack and wheel right now. It obviously isn’t put into a full bike yet

    • @moustafamohsen
      @moustafamohsen 6 ปีที่แล้ว

      GreatScott!
      yes

  • @florianfeith
    @florianfeith 6 ปีที่แล้ว +1

    Great video. I wish it had been out a bit earlier because I made my own replacement battery Pack a few weeks ago. I also ordered the cells at accuteile. I soldered the nickel tape to the cells which is a pain in the ... .
    Theres one thing you might want to know: I realized the range at which the BMS turned off because of overdischarge was quite low. So I tried to get my head around it and realized that it might be due to short negative voltage peaks at the start of high power consumption (i.e accelerating). So I soldered a 1000uF support capacitor parallel to the output of the batterypack (i.e. the BMS). Et Voila: Range nearly doubled.
    I also created a range extender from the old cells which were ok according to capacity but just developed a higher inner resistance. I still try to figure out a good way to parallel the two packs safely. What I do right now is charge them both and then just connect them via a 10A fuse (which by the way blew twice already).
    Keep up the great work. I like the accent. I have the same (-;

    • @EfficientMan
      @EfficientMan 2 ปีที่แล้ว

      I believe you should not connect in parallel two packs that are not the same (not same age in your case). When I want to balance batteries in parallel I connect them through a resistor initially, after a while I put smaller value resistor, you repeat that until you cannot see voltage across the resistor anymore which means no current so they are balanced.

  • @barirwin8559
    @barirwin8559 5 ปีที่แล้ว +1

    Thank you, man . I learned loads.

  • @ravivashatkar5585
    @ravivashatkar5585 6 ปีที่แล้ว

    Love you Great Scott !! Yummy electronics 😋 ... Interesting !!

  • @blessedchildofgod200
    @blessedchildofgod200 5 ปีที่แล้ว

    Love the name. I immediately thought of back to the future

  • @Better_Call_Bulba-Saur
    @Better_Call_Bulba-Saur 4 ปีที่แล้ว +1

    I learned a lot from your video. Thank you!

  • @domi1711
    @domi1711 6 ปีที่แล้ว

    great video as usual. Keep up the good work!