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Switch parallel and serial connection of battery cells.

Vladimir Ilinykh
Prodigy 40 points

Lithium batteries. Necessary high voltage - connected in series, you need to recharge, and equalize the charges - connected in parallel. It is strange, why this method is not used. Make such a switch is easy to MOSFET or relay. If you want a permanent presence of voltage from the battery, you can make two identical blocks. One is on duty, the other charged or equalized.

  • 0
    Prodigy 110 points

    You got a good point Vladimir. For lower number of batteries, your battery system is practical. But How about such systems that contains a lot of lithium batteries? For example think about a battery pack 7s4p. (means we have 7 cell and each cell have 4 parallel battery, Total number of battery is 28). Suppose that each battery is charged by 2 amper. In the case of serial charging, 4*2=8 amper, we need a charger that can provide 8 amper. We can find this charger in the market easily. Now think about to charge this battery pack with your system. There will be 28 parallel battery and, 28*2=56, 56 amper is needed to charge this battery pack. To find 56 amper charger is not so easy.Thats why we charge batteries serially with the help of voltage balancers.

     

  • 0 in reply to OMER SONMEZ
    Prodigy 40 points

    Quite agree, I think that this scheme is applicable to the 4 - 5 series-connected elements. On this was calculated. The fact is that with the help of this scheme is easier to align and charge. Turned to cheaper chip. IMHO