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Charge 48V battery from a 12V source

Discussion in 'Power Electronics' started by cdw3423, Dec 21, 2011.

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  1. cdw3423


    Dec 21, 2011
    I have a 48V inverter powered by 4 lead acid batteries in series. I want to be able to charge the them with a 12V source. What I don't want to do is use a DC - DC converter to step the voltage up.

    Hear is my idea. Have 4 sets of transistors used simply for switching each battery in or out of the load. That way I would charge each of the 4 batteries one at a time. Then have some sequencer circuit that will rapidly cycle from battery to battery. Some kind of logic circuit to make sure there was no way more than on of the transistor pairs could be on at a time would be good.

    The most power I would be supplying to this device would be 30 amps. So each transistor should be able t handle a spike of 30 amps and an average of 7.5 amps.

    Is this something I would need to build from scratch or can I find parts that or the whole thing already built?

    Any recommendations would be helpful.

    Chris W
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