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A lithium battery DIY experiment.

Discussion in 'The Garage' started by gggGary, Oct 1, 2020.

  1. gggGary

    gggGary I'm listening, change my mind XS650.com Supporter Top Contributor

    So bought this stuff and will see if i can build a battery out of it!
    These are the battery cells , 4 to make a "starter battery"
    [​IMG]
    2 Pack Headway 38120 Single Cell Holders Spacers
    $1.00 USD 4 $4.00 USD
    Headway 38120 100a Copper Busbars
    $1.15 USD 6 $6.90 USD
    HEADWAY 38120 HP 3.2V 8AH LIFEPO4 BATTERY
    $11.99 USD 4 $47.96 USD
    Subtotal $58.86 USD
    Shipping and handling $15.18 USD
    Total $74.04 USD
    Payment $74.04 USD
    So the gory details to follow if I survive the construction process.....:laugh:
     
  2. Mailman

    Mailman Hardly a Guru Top Contributor

    Well this looks interesting. :popcorn:
    What is the advantage you’re seeking with these?
     
    Greyandridin, Jim and gggGary like this.
  3. gggGary

    gggGary I'm listening, change my mind XS650.com Supporter Top Contributor

    Weight and size and power? gonna be a remodel project to go with, either Madness or Ywain is going to take advantage of the space saving. I put a factory built LI in the EBR and was quite impressed with how much performance comes out of a small light package. I used that one for a year with months between starts or charges with no issues.
     
    Last edited: Oct 1, 2020
  4. gggGary

    gggGary I'm listening, change my mind XS650.com Supporter Top Contributor

    I'm also messing 'round with electric bikes so thought this is a simple way to get my feet wet battery building..
     
  5. Jim

    Jim Beyond the edge is the unknown. Here be Dragons XS650.com Supporter Top Contributor

    Careful testing that thing....

    shock.gif
     
  6. JRay77

    JRay77 XS650 Addict

    Reminds me of a dirty old joke. What does a 9v battery and a chicks butthole have in common? You shouldn't stick your tongue on it but you do anyway.... Haha
     
  7. itschrisb

    itschrisb XS650 Addict

    How do the LI batteries hold up to vibration? I just had a battery get rattled to death. Looking for a decent replacement now.
     
    Greyandridin and JRay77 like this.
  8. gggGary

    gggGary I'm listening, change my mind XS650.com Supporter Top Contributor

    Haven't heard of any death by rattle yet.
    Looking into BMS for cell balancing.
     
    Greyandridin and itschrisb like this.
  9. WideAWAKE

    WideAWAKE Single Fins and Twin Cylinders

    I know two people who have had their sheds go up in flames from LI batteries on electric bikes. Be careful.
     
  10. 650Skull

    650Skull SSSSSSSSSlither Top Contributor

    I think its the Chinese knock offs, and there are a couple of fires each week, over here, caused by Lithium batteries
     
    Greyandridin, MaxPete and gggGary like this.
  11. Bushyeyed1

    Bushyeyed1 Cafe Racer XS650.com Supporter Top Contributor

    I wish advance didn’t stop selling their lithium motorcycle battery I have on my bike. It’s been over a year and still sits at 14.6 volts full charge even after sitting days. It would suck if it caught on fire though because it’s under my nuts.
     
  12. Downeaster

    Downeaster Everything in XS Top Contributor

    Good thing your name isn't Chet. "Chet's nuts roasting on an open fire....":eek::eek::lmao::lmao::rolleyes::rolleyes:
     
  13. MaxPete

    MaxPete Lucille, Betty & Demi - I suggest but THEY decide. XS650.com Supporter Top Contributor

    ....vibration you say?

    Sorry Chris, but this is a forum about Yamaha XS650s and so there is no vibration of which any of us are aware.

    BWAHAHAHAHAHA! :lmao:
     
  14. MaxPete

    MaxPete Lucille, Betty & Demi - I suggest but THEY decide. XS650.com Supporter Top Contributor

    The other thing is charging voltage and current control Gary - quite different for Li than for regular Pb batteries.
     
    Paul Sutton, Greyandridin and gggGary like this.
  15. MaxPete

    MaxPete Lucille, Betty & Demi - I suggest but THEY decide. XS650.com Supporter Top Contributor

    Dang it DE - you made me snort again and I woke up the cat and the wife.
     
  16. Downeaster

    Downeaster Everything in XS Top Contributor

    Oh. Um....sorry...

    Okay, not really...:laugh: :poke:
     
  17. MaxPete

    MaxPete Lucille, Betty & Demi - I suggest but THEY decide. XS650.com Supporter Top Contributor

    no problem...check my post in your paint thread.

    hehehehe.
     
    Greyandridin and gggGary like this.
  18. JRay77

    JRay77 XS650 Addict

    Depends on the application. There’s a reason Antigravity packs theirs with a lot of foam. Very sensitive to vibration. My point, if a person needs to wrap the battery with foam for vibration, defeats the purpose of small/compact. You guys are smart, so y’all realize how sensitive lithium batteries are to overcharging. Get that “shunt” reg/rectifier. I’ve mentioned this in other posts as well. Just a few learning curbs I’ve had. I’ve had the best luck and long term usage out of sla batteries. They’re cheap too. Any size you want just how many amp hours you want. I forgot to mention “kick start only”. Obviously these starters need a lot of amps to turn over. I have a lithium jump pack I paid $100 for. I use this to start my mower as well. Thing is, better start in a handful of turnovers or my pack dies. Has anyone tried a cordless drill lithium battery? I don’t have one handy to see the amperage. We did play with a 18v cordless drill battery on a 12v kids power wheel recently. This would pop wheelies! Haha motor kept over heating. Haha! Just make jumpers. There’s a small + and - where the contacts are.
     
    Last edited: Oct 3, 2020
    Greyandridin and MaxPete like this.
  19. gggGary

    gggGary I'm listening, change my mind XS650.com Supporter Top Contributor

    Got em'
    20201007_112938.jpg
    Assembled 3lb 1 oz
    20201008_090033.jpg
    oops LOL revised the layout, the end caps interlock, slide together so changing config was easy.
    20201008_090932.jpg
    20201008_091408.jpg
    Can't keep my grubby little fingers off, wanted to try it so fitted into available space, quick and dirty. A dedicated tray for the 4 in a row config would be a nice space savings.
    20201008_092212.jpg
    Did not bench charge, just tossed them in. Three cells measured 3.26 volts one 3.25 close enough for hand grenades.:yikes: After yesterday's ride madness was on the edge of having to go on reserve, so the battery got a workout bringing her to life. It cranked it well, after a couple tries got a little slow here n there, she is a high compression 750, but kept going. Will try to get 'r out on the road for a while later this afternoon. Think I have a remote reading thermometer I can tape to the bars, so I see any thermal anomalies. Madness has 2 voltmeters so that's covered. No BMS, still thinking on that, basically the XS cannot over charge or discharge beyond the cells capabilities. :cautious:
     

    Attached Files:

    Last edited: Oct 8, 2020
  20. JRay77

    JRay77 XS650 Addict

    Well I'll be damned. You're an awesome nerd!
     

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