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Looking ahead to putting this system into an EV (or something not PHEV related), I'd like to find a way to eliminate one of the more expensive components of the system, the celllog. I was thinking I might be able to use a multiplexing chip to increase the number of analog pins I have. Since cell voltages are well under 5V, I can read them all into an array or something. With that raw data I'll have much more data to work with and be able to do more with it. However, I've never used a multiplexing chip, and pulling individual voltages off a bank of many cells is also presents problems. Mainly, I have to move the ground reference every time I jump to the next cell. Currently, I'm not even grounded to the high voltage pack, just the 12V system. So, if anyone has any ideas I'm all ears.
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