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What are the differences between battery series-parallel discharge and single battery discharge?

Differences between battery series-parallel discharge and single battery discharge

Battery series-parallel discharge refers to discharging multiple batteries in series or parallel, which has the advantages of increasing voltage, capacity, and power compared to single battery discharge, but also has some disadvantages.

Series connection

Series connection refers to connecting the positive poles of multiple batteries to the positive poles and the negative poles to the negative poles to form a series circuit. After the series connection, the voltage of the battery will increase, while the capacity and discharge power remain unchanged.

Parallel connection

Parallel connection refers to connecting the positive poles of multiple batteries to the positive poles and the negative poles to the negative poles to form a parallel circuit. After the parallel connection, the capacity and discharge power of the battery will increase, while the voltage remains unchanged.

Series-parallel connection

Series-parallel connection refers to combining multiple batteries in series and parallel. After the series-parallel connection, the voltage, capacity, and discharge power of the battery will all increase.

Differences

FactorSeriesParallelSeries-parallel
Battery voltageIncreasedUnchangedIncreased
Battery capacityUnchangedIncreasedIncreased
Discharge powerUnchangedIncreasedIncreased
AdvantagesReduce the number of batteriesIncrease discharge currentIncrease voltage, capacity, and power
DisadvantagesAny battery failure will cause the entire battery pack to failNeed a larger spaceNeed to ensure that the voltage between batteries is consistent


Power loss during series-parallel connection

In the process of series-parallel connection, due to the impedance of the series-parallel line itself and the


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