Multi-string battery equalization management method and system

Abstract

The invention provides an equalization management method and system for multiple strings of battery packs. The equalization management method comprises the following steps: A, obtaining a voltmeter; B, obtaining a weight table; C, determining short board batteries; D, executing equalization; E, judging whether the short board batteries change or not. The equalization management method and system provided by the invention have the following beneficial effects that the equalization time is long and the equalization capability is sufficiently utilized; equalization can be started correctly, repeated equalization is reduced, and the operation efficiency of the system is improved; the requirement on equalized current is reduced, the requirement on parameters of electronic devices are reduced, and the cost is reduced; when passive equalization is used, the requirement on heat dissipation of circuits is relatively low, the design is simplified, and the cost is reduced; the battery with fastest attenuation speed can be screened and later maintenance is facilitated.

Description

technical field [0001] The present invention relates to new energy-battery management, in particular to a method and system for equalizing management of multi-string battery packs. Background technique [0002] At present, because battery packs can be used in series to obtain a certain voltage, power and energy level, it is widely used: from daily mobile phones and notebook computers to the future development direction of automobiles - electric vehicles, all cannot do without series battery packs . During the use of series battery packs, each battery cell has inconsistency, which makes the battery prone to overcharge and overdischarge during the charging and discharging phase. Therefore, the battery pack must be managed in a balanced manner, so as to achieve the purpose of protecting the power supply of the battery pack in series. [0003] The traditional multi-string battery equalization management method has the following deficiencies: [0004] 1) The equalization time ...

AI Technical Summary

Problems solved by technology

[0004] 1) The equalization time is short and the equalization effect is not obvious;

[0005] 2) Turn on the equalization by mistake, resulting in repeated back and forth equalization, which is useless;

[0006] 3) It requires a large balance current, which increases the requirements for electronic device parameters and increases the cost;

[0007] 4) If passive equalization is used, there will be higher requirements for circuit heat dissipation, which will increase the cost;

[0008] 5) It will interfere with the screening of inconsistent batteries, which is not conducive to later maintenance

Images