So here I am dismantling laptop battery packs and when I grab the next set of cells to disassemble I notice that some of the cells are much warmer than ambient temps. I had only removed the cells from the plastic battery shell. I hadn't started to disconnect all of the cells from each other yet. I immediately took all 9cells from that battery outside. I disconnected the cells that were warm. There were 3 in parallel and it felt like the middle cell was the warmest so I wasn't sure if that was the only cell that was discharging or if the other 2 were also discharging. After a couple of minutes they cooled off and their voltages were almost but not quite at 0V. The other 6 cells didn't get warm and all have a voltage at about 1V.
I checked the 3 for any physical signs of damage or what might have caused them to suddenly start discharging and I didn't find anything so I don't think it was anything I did but they've been sitting around for a long time and only now discharged. Has anyone else seen behavior like this before?
I checked the 3 for any physical signs of damage or what might have caused them to suddenly start discharging and I didn't find anything so I don't think it was anything I did but they've been sitting around for a long time and only now discharged. Has anyone else seen behavior like this before?
