visuthdy wrote:A couple of weeks ago, I was able to to connect the 12S2P that output 45V. I had left the battery connected and now all four of my 6S packs are swelled up and not producing any voltage, not even powering up the CA.
Question: were they only at 45V at full charge? Because that sounds pretty low, nearly discharged (at best about half full?) for 12S LiPo, at only about 3.75V/cell. Normally full charge would be closer to 49.2V (4.1V/cell) up to 50.4V (4.2V/cell).
If they were left connected to the controller and CA, when that low a charge state, it probably would not take very long for them to discharge down to the "cliff" state, and be taken all the way down to nothing from there.
Assume 150mA (possibly a lot more) used by a controller in idle, plus the CA. Each hour, that's 150mAh. 10 hours would be 1.5Ah, a whole day would be 3.6Ah, which is probably a lot more than they had left in them if they were at 45V to start with.
Assuming normal full capacity of 10Ah at full charge of 4.2V/cell, you would only have a bit less than 3 days of idle power, even then, at 150mAh idle consumption.
So there might not actually be anything "wrong" other than not having enough power to be able to just leave them connected like that for any length of time.