基于外部储能式动力电池放电均衡系统仿真研究

doi:10.19799/j.cnki.2095-4239.2020.0016

摘要/Abstract

摘要：

针对单体电池之间的差异使电池组在循环工作过程中出现充放电速率不一致，工作效率不高，能量利用率低及缩短使用寿命等问题，设计了基于超级电容下反激式多绕组变压器动力电池积极均衡电路。超级电容作为外部储能元件，配合多绕组变压器，以电池电压和荷电状态作为判断条件，进行单体电池能量均衡控制。仿真实验表明，该均衡电路及对应控制策略能够有效弱化电池组在工作过程中出现的木桶效应，提高电池组能量利用率，增加续航能力，延长电池组使用寿命。

关键词: 电动汽车, 电池均衡, 超级电容, 多绕组变压器, 仿真

Abstract:

Battery packs exhibit inconsistent charge-discharge rates during their work cycles because of the differences among single cells, resulting in low work efficiency, low energy utilization, and short service life. To resolve these issues, a positive balancing circuit is designed for the power battery of a flyback multi-winding transformer based on a supercapacitor. By considering the battery voltage and state of charge as the judgment control conditions, the supercapacitor, which is an external energy storage component, cooperates with the multi-winding transformer to balance the energy of the cell. Simulation results show that the equalization circuit and control strategy can effectively weaken the barrel effect during the work cycle of the battery pack, improving its working efficiency, endurance, and service life.

Key words: electric vehicle, battery equilibrium, super capacitor, multi-winding transformer, simulation

中图分类号:

TM 911

郑征, 高卫星, 张茜. 基于外部储能式动力电池放电均衡系统仿真研究[J]. 储能科学与技术, 2020, 9(4): 1167-1177.

ZHENG Zheng, GAO Weixing, ZHANG Xi. Simulation study of a battery discharge power balance system based on the external energy storage method[J]. Energy Storage Science and Technology, 2020, 9(4): 1167-1177.

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