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Old 03-13-2015, 03:13 AM   #6 (permalink)
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Originally Posted by planetaire View Post
...with a capacitive bms.
Still ok. But I avoid using this 13.2 volts without the prius dc-dc converter on.

Are you sure your 4 cells had the same capacity ?
What is a capacitive BMS? Is it more efficient than other schemes? I'm also unclear about what you mean by avoiding the 13.2 volts without the Prius DC converter on.

I'm not sure the 4 cells had the same capacity because I might have damaged the battery once before while trying to measure electrical loads on the Acura. Testing took quite a long time, and I was going through each accessory load and ended up running the voltage too low, to maybe 8 volts. It got very warm, but I put it on the balance charger and figured it was ok.

This time the voltage dropped to about 6 volts, got very warm, and the battery is puffy. Cell 1 refuses to go above about 2 volts on the balance charger, and rapidly drops below 1 volt when left alone.

I'd be interested in a low voltage cutoff, but those probably put a large electrical load on the circuit themselves.
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