R6bbie wrote: ↑
Jul 18, 2018 1:15 pm
I have ran it a few times after this issue and it still didn't charge and did the on and off over and over without charging the battery.
Does it do this if it's not connected to the battery at all?
If so, then there's rpobably a break in the wiring from charger to battery somewhere (anywhere in the path, from inside the charger to inside the battery).
If not, then either the charger is just flaky, or the BMS is not allowing it to charge.
If the former, a different charger will work. If the latter, a different charger will also not charge it.
if you can connect the charger to the output (controller end) of the battery, it will bypass the BMS charge port, so fi the BMS is stopping the charge then the charger will now work normally.
If it does not change teh charger behavior, then the rpoblem is more likely in teh charger itself, and trying a known good charger would verify this.
If the BMS isn't allowing a charge, it could be the cells, or it could be a wiring fault (balance wires most likely), or it could be a cell or group problem (cells or interconnects). Or it could just be a bad BMS.
The charger has acted up before,
Exactly how has the charger "acted up"? If it's teh same as this problem, and you knwo it was the charger then, then there's no need for any questions, just a new charger or a repair of the existing one.
If you don't know for sure it was the charger then, then you'd still need to do troubleshooting as you don't know that the charger was what was acting up or not.
What happens if my BMS is bad? How would I fix that
Replacing it is the only way that's easy. Otherwise you'd have to do compnent-level truble shooting and repair on the BMS. If you don't have electronics experience, it could take a while to track down and repair the problem.
But first, you should test the other things.