fechter wrote:OK, one thing keeps popping into my head when talking about building packs from power tool batteries. The BMS has FETs to open the circuit in the event of overcurrent or undervoltage, and possibly overvoltage.
If you put a bunch of these packs in series, and the BMS opens on the end pack, the FETs would see the entire pack voltage, which could be higher than their voltage rating. Actually if any of them go open, they could get full pack voltage. Careful setting of the current limiter on the controller should prevent the BMS from ever going open circuit.
But, if it has a lifetime warranty, who cares?
NickF23 wrote:someone mentions on the forum there magnesium based cathode like similar to milwaukee. I'm quite surprised no-one is yet selling them for ebikes yet. it seems lots of places making them in china.
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