I see what you mean, just because the pack temperature hasn't got very hot, doesn't mean it's not going to at some point
![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)
Now I've got loads of space in the PIC18F2680 I'll put some code in to cut the charge if the temperature gets too high (what would be considered "too high"?). As for a cell going to 0V I presume this would shut down the slave PIC in which case I'd get a serial error, which will cut the charge. The 5A bulk charge is "one time only", once one cell has got to the predetermined limit it will only ever charge at the lower current thereafter.
The problem isn't entirely one of balance, that cell still charges quickly (and is the one that bounces up to the top and restarts the charge when it drops down again), and it still drops to 3.1V or so under acceleration. So when I get the time (which is in relatively short supply at the moment
![Sad :(](./images/smilies/icon_sad.gif)
) I will be taking the pack out again to do some more investigation.
Ian.
A train station is where the train stops. A bus station is where the bus stops. On my desk, I have a work station....