Battery pack and control method thereof
A technology of battery packs and battery packs connected in series, which is applied in the field of power supply, and can solve the problems of battery pack life reduction, battery pack bursting, and poor battery performance.
Inactive Publication Date: 2013-01-23
内蒙古快为科技有限公司
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Problems solved by technology
[0005] This kind of battery pack takes parallel battery packs as the unit, and the equalization and acquisition circuit can only collect parameters such as voltage, current, and temperature of the parallel battery pack. However, the parameters of a single cell in the parallel battery pack are different from those of other There are differences between the parameters of the batteries, and the battery characteristics of the parallel battery pack depend on the characteristics of the worst-performing battery cell in the parallel battery pack, and the worst-performing battery cell will increase with the number of times the battery pack is charged and discharged. The increase will cause the performance to become worse and worse, thereby reducing the life of the entire battery pack, and in severe cases, the battery pack will burst, posing a safety hazard
Method used
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Embodiment 1
[0029] Such as figure 2 As shown, the first embodiment of the present invention provides a battery pack 1, including a plurality of battery packs in series 11, a plurality of acquisition circuits 12, a control circuit 13 and a charging and discharging circuit 14, wherein the series battery pack 11 and the acquisition circuit 12 one-to-one correspondence;
[0030] The series battery pack 11 includes a plurality of battery cells 17 connected in series in sequence, and each battery cell 17 is connected to the input terminal of the acquisition circuit 12 corresponding to the series battery pack 11 where it is located, and the positive pole of each series battery pack 11 is connected in parallel. The way is electrically connected with the input end of the charging and discharging circuit 15, and the negative poles are connected in parallel;
[0031] The output end of each acquisition circuit 12 is electrically connected to the input end of the control circuit 13, and the input en...
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A battery pack and a control method thereof. The battery pack (1) includes multiple series batteries (11), multiple sampling circuits (12), a control circuit (13) and a charging-discharging circuit (14). The series batteries (11) are in one-to-one correspondence with the sampling circuits (12). Each of the series batteries (11) includes multiple cells (17) connected in series sequentially. Each of the cells (17) is connected with the input terminal of the sampling circuit (12) corresponding to the series battery (11) including the cell (17). The positive electrodes of the series batteries (11) are connected to the input terminal of the charging-discharging circuit (14), and the negative electrodes are connected together. The output terminal of each of the sampling circuits (12) is respectively connected to the input terminal of the control circuit (13). The output terminal of the control circuit (13) is connected with the input terminal of the charging-discharging circuit (14). With the control method, the battery pack can be protected, and the service life and the security of the battery pack can be improved.
Description
technical field [0001] The invention relates to the field of power supplies, in particular to a battery pack and a control method thereof. Background technique [0002] In high-power application scenarios, the voltage and current provided by a single cell cannot meet the demand, and a battery pack needs to be used instead of a single cell. The battery pack is combined in a certain way, such as connecting multiple cells in series to increase the supply voltage and connecting multiple cells in parallel to increase the supply current. [0003] Such as figure 1 As shown, a battery pack provided in the prior art includes a plurality of parallel battery packs S1, an equalization and collection circuit S2, a control circuit S3 and a charging and discharging circuit S4. Wherein, each parallel battery pack S1 is formed by parallel connection of multiple battery cells, and multiple parallel battery packs S1 are connected in series. [0004] Wherein, under normal circumstances, the ...
Claims
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IPC IPC(8): H02J7/00
CPCH01M10/44H02J7/0021Y02E60/10H02J7/0048H02J7/005H02J7/0016
Inventor 刘新宇水伟刘伟
Owner 内蒙古快为科技有限公司