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
Factor | Series | Parallel | Series-parallel |
---|---|---|---|
Battery voltage | Increased | Unchanged | Increased |
Battery capacity | Unchanged | Increased | Increased |
Discharge power | Unchanged | Increased | Increased |
Advantages | Reduce the number of batteries | Increase discharge current | Increase voltage, capacity, and power |
Disadvantages | Any battery failure will cause the entire battery pack to fail | Need a larger space | Need 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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