Quote:
Originally Posted by EdFNJ
Replacing individual cells in a pack isn't always a good idea. While it may not be noticed in a very low current small device replacing individual higher powered cells within a pack can be problematic and even dangerous due to different voltages and wear between the original cells and the 1 replacement cell in the pack. All the cells should be replaced with matched cells then balanced when it is a high current product within the pack. Small multi-cell battery repair is one thing, but replacing individual cells in a large capacity (amps) pack really isn't a good idea. Some "smart" chargers and batteries won't even work after doing that because they sense the unbalanced voltage on the individual cells which is why they have "computer chips" inside the pack. Drone batteries I have used are "smart" like that as they have high and fast output and generate a lot of heat. The chips in them monitor and record each individual cell in the pack.
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I suspect golf cart upgraded package to lithium looks like something this. Now if buy new cart it may have just big box containing cells (no battery packs)
Allied Lithium Batteries for Golf Carts 72V (Includes Lithium Charger)
Price wise not that much for conversion plus labor?? After conversions cost would be cheaper just for batteries?
So, individual battery with bad cells be replaced without replacing the hole battery package. And I suspect the bad returned battery probably have the ability to repair cells inside by manufacture? So agreed, repair by individual could not be possible on high voltage battery sealed by manufacture , plus where would get the cells to even attempt it. but replace the bad battery in pack would certainly be option if one when bad I hope?