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Discussion Starter · #1 ·
I have a Sun 60v battery on my custom ebike, its one of those box shaped shaped batteries with what I call bag cells inside, sorry for the weird discription. Anyway, it won't charge, charger checks out OK so I checked each cell and one feels soft whereas the others are firm. The soft one is only reading 1 volt and all the rest are about 3.5v each. I've removed the bad one from the pack plus one more to get the tabs to line up. Is the BMS still going to work with the 2 cells removed?
 

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Do you know the correct name of these cells so I can search
View attachment 130546 View attachment 130544
As floyd said, they're pouch cells... but you need a lot more information than that to find a suitable match. At the very least, the same electrode chemistry and the same capacity (in amp-hours). Getting a BMS to work with the battery that you have seems like a better idea to me.
 
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