I often hear that it’s hard to find someone who’ll rebuild battery packs because it’s not worth it and can be dangerous, so it’s easier to just buy a new one. But from what I understand it’s just a series of smaller batteries all linked together?
Rebuilding seems even easier than building from scratch, just desolder the old batteries and swap them for new ones. Bing bang boom job done. …so how likely is the boom part? lol
What is it that can so easily go wrong that makes people say don’t attempt this on your own?
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It’s only really worth it when you have a very expensive battery(like in an electric car), and one of the sections fails prematurely making the whole pack unusable.
For the original manufacturer, you already have a heavily automated production line, why bother training people to manually fix things?
For third parties, what kind of warranty can you realistically provide, when your customers only start coming to you when the original warranty expires?
Cell balancing is also an issue. you won’t be getting the full cycle life out of the new cells unless you replace every cell in the whole battery.
As for why it’s dangerous, there are high voltages present with high currents available, lithium batteries are also a fire hazard, and the’re often welded together. The packs as a whole are often glued together. Not designed to be worked on.
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