Chevy Spark EV battery module teardown.

Check out my other spark EV battery vids here:
• Spark EV battery teardown

[@TRYtoHELPyou]

THIS IS GREAT! Thanks for sharing. they built this battery well. A bit complex and stuffed full of stuff..... but well put together indeed.

[@edsautomotivehowto2706]

Agreed, it's actually a pretty impressive design.

[@justthisguyyouknow666]

The cooling plates remind me of a old-school freezer wall with similar channels for the refrigerant.

[@edsautomotivehowto2706]

I was shocked at just how thin the channels were... Pretty amazing actually.

[@solarpunkstation]

IIRC from my time as a battery researcher (15-20 years ago), compressing pouch cells also leads to slightly higher capacity than an unconstrained cell. It's also more convenient for packaging, so it's a win-win unless they go too far into the spicy pillow stage and damage the containment. Again, it's been a minute, so take that with a grain of (lithium) salt.

[@edsautomotivehowto2706]

No, I think you're right. I've read the same thing before. Something about preventing the battery's internals from separating too much prevents a loss in efficiency.... Or something. Lol

[@Detroitblue]

great job!

[@edsautomotivehowto2706]

Thx!

[@jpl9148]

Thanks so much for sharing this! Ok guys anybody have a better battery cell number for an upgrade in 2024 ?

[@edsautomotivehowto2706]

Thx for the comment!

[@rf_dude]

Nice! Battery hacker's heaven. Seems there are 15 series cells. If this block was to be used for a 48V application, it would require 13S (typical 54V) or 14S (Telecom going to 58V) for float. Once the weak cell is identified, it could be discharged manually to 0V, then shorted to leave the remaining good cells in the string functional and intact in their nice case. Could this be viable? Or would the 0V cell expand and create pressure on the adjacent cells?

[@edsautomotivehowto2706]

It's actually 32 total cells, 2p16s This module is the only one that has issue, so I'll find the bad cell and recycle it. As for the other modules, I'll be able to use all the cells. I wouldn't risk leaving a bad cell in a pack to be honest.

[@ericklein5097]

I guess its too late to say this (unless you haven't dissected the other modules) but tearing the cell tabs off what they are welded on (I guess you'd call it a bus bar of sorts, the U shaped pieces of copper) but those are likely welded on by an ultrasonic welder...so not something the hobbyist can redo....and trying to do resistance spot welding is going to be extremely difficult depending on the material of the tabs (often aluminum and nickel plated copper) There are some videos here on KZbin of people working on similar packs and fabricating compression style bus bars of their own but the question of resistance definitely exists....at the end of the day it will never be as good as the original ultrasonic weld to the copper pieces. Definitely restricts high discharge capabilities of any future battery you DIY. The best route for reusing these EV modules is to keep them together until you know what you plan on using them for and then do some brainstorming on the best way you can configure the modules to get your desired series connections by doing the fewest number of DIY series connections if you cannot replicate the original method of welding the cells together.

[@edsautomotivehowto2706]

Yep, learned it the hard way 😂 But I did find a solution that worked, check out the next video in this series...