Battery equalization circuit and method

Abstract

A battery equalization circuit comprises a battery pack, a voltage acquisition module, a control module, an isolation driving module and an equalization module. The battery pack comprises N battery individuals connected in series. The equalization module comprises N electronic switches, N diodes and N-1 inductors. The positive pole and the negative pole of each battery individual are connected to the voltage acquisition module. The first end of each electronic switch is connected to the isolation driving module. The positive pole of the M-th battery individual is connected to the second end of the M-th electronic switch and the cathode of the M-th diode through the M-1th inductor. The negative pole of the M-th battery individual is connected to the third end of the M-th electronic switch and the anode of the M-th diode through the M-th inductor. 1 < M <N, M and N are positive integers. The battery equalization circuit has a simple structure and high equalization efficiency. The invention also provides a battery equalization method applied to the battery equalization circuit.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of batteries, in particular to a battery balancing circuit and method. [0003] 【Background technique】 [0004] A battery pack serving as a power supply is usually composed of multiple battery cells connected in series to meet the voltage and power requirements of electrical equipment. However, there are usually differences between each battery cell, and these differences will cause inconsistency in the performance of each battery cell, and the inconsistency in performance will cause overcharge and overdischarge of the battery cell, resulting in a large voltage difference between the battery and the battery Capacity reduction and other issues will lead to unbalanced battery packs and overall performance degradation, and even affect the service life of the battery pack. [0005] In view of this, it is necessary to provide a battery balancing circuit and method to overcome the above defects. [0006]...

AI Technical Summary

Problems solved by technology

However, there are usually differences between each battery cell, and these differences will cause inconsistency in the performance of each battery cell, and the inconsistency in performance will cause overcharge and overdischarge of the battery cell, resulting in a large voltage difference between the battery and the battery Capacity reduction and other issues, which will lead to unbalanced battery pack and overall performance decline, and even affect the service life of the battery pack

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