Help! Bought a used ebike with battery/BMS issues..

WheatyPop

New Member
Region
USA
Recently I bought a used Velowave Ranger ebike, and I have spent quite a bit of time fixing it up. I finally had it up and running, but I discovered a pretty severe issue with the battery.

The battery works fine during pedal assist 1 and 2, but if I go any higher, the battery will shut off and not turn back on. Full throttle has the same effect. After I plug the battery into the wall, it will turn on again. This seems to be a problem with a weak or unbalanced battery pack - I just don't know how to fix it.

I'm currently trying a long top-balancing session to balance the cells in the battery. I'm not much of a tech guy so any help or assistance is appreciated. thank you
 
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