Quote:
Originally Posted by russatt
I was also considering a high power 12v charger, and then charging the batteries in parallel, so that they can equalize, but I am not sure if it will be safe with the batteries in series as well, contactor open, and what diodes and components would also be required.
This charger is 12v 320 amps max. Adjustable.
Would it work, or is this a bad idea.
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In theory it will work. However, you need contactors or disconnects between each battery so nothing is connected in series while charging in parallel and a way to disconnect all charging wires so nothing is connected in parallel while driving the car with the batteries in series. Diodes will not work.
For a 72V system, this would require a minimum of five contactors/disconnects to open all series connections and 12 separate switches for charging circuitry. Everything would have to be well protected (fuses) in case even one component failed, causing smoke to be let out of something.