110Ah Battery charging

Discussion in 'General Electronics Chat' started by Jonnap2000, Nov 7, 2009.

  1. Jonnap2000

    Thread Starter New Member

    Oct 7, 2009

    Can you tell me how long it will take to charge 10, 12v, 110Ah batteries with a 28v 600A charger. The charger is actually a PCU cut will charge the batteries when the engine is switched off.

    Does it matter if six of the batteries are series/parrallel?

  2. SgtWookie


    Jul 17, 2007
    Well, it's certainly maximum overkill to charge batteries like that. If they're more than about 25% discharged when you try to charge them, the batteries will get heated internally. It takes a long time for them to cool back down - and when they're hot, the increased chemical activity shortens their life, and their maximum charge voltage decreases; which makes them hotter still.

    Here is how you would need to connect them up:


    Each battery will receive approximately 120A charging current if they are discharged to 0v. Expect a very loud explosion if you try to charge completely dead batteries.

    If one of the batteries has a shorted cell, the other one in series with it will become badly overcharged and overheat; very likely damaging it.

    Have a read on this page: http://www.solarnavigator.net/battery_charging.htm

    Your batteries will "bulk charge" pretty quickly from a low charge state, but will also get pretty warm. Since you're just feeding them 28v, (14v/battery) the last part of the bulk charge will go rather slowly. The absorption charge (last 10% to 15%) won't go any faster than standard chargers. If you leave them charging for too long, the batteries will begin gassing from overcharging.
    Last edited: Nov 7, 2009