Sunday, March 21, 2010

Final connection pics

I forgot to upload pics of the final battery connections, so here they are. The front:
and the rear battery pack:

Here's a close-up of the connections:

As you can see, each cell monitor straddles its respective cell, and the copper interconnects go between cells. The monitors are daisy-chained together in a large wire loop that terminates at the BMS unit in the rear of the vehicle. If any one cell encounters a problem, it notifies the BMS, which can then cut power to the charger.

Right now I only have per-cell protection from over-charge, but not per-cell protection from over-discharge. The Zilla motor controller is providing protection of the pack as a whole from over-charge, with a low voltage limit of 130V (2.5V/cell).

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