储能科学与技术 ›› 2016, Vol. 5 ›› Issue (2): 222-227.doi: 10.3969/j.issn.2095-4239.2016.02.015

• 研究及进展 • 上一篇    下一篇

开关电容法均衡的效率分析

张敏吉1, 孙洋洲1, 梁嘉1, 赵昱杰2, 凌志斌2   

  1. 1 中海油研究总院新能源研究中心,北京100015;
    2 上海交通大学电气系,上海 200240
  • 收稿日期:2015-07-27 修回日期:2015-09-22 出版日期:2016-03-01 发布日期:2016-03-01
  • 通讯作者: 凌志斌,副教授,主要研究方向为电池储能,E-mail:lingzhibin@sjtu.edu.cn.
  • 作者简介:张敏吉(1978--),男,硕士研究生,主要研究方向为太阳能电池,电池储能技术等,E-mail:fengyemuse@sjtu.edu.cn

The balancing efficiency analysis of the switched-capacity method

ZHANG Minji1, SUN Yangzhou1, LIANG Jia1, ZHAO Yujie2, LING Zhibin2   

  1. 1 CNOOC Research Institute New Energy Research Center, Beijing 100015, China;
    2 Shanghai Jiao Tong University Electrical Engineering Department, Shanghai 200240, China
  • Received:2015-07-27 Revised:2015-09-22 Online:2016-03-01 Published:2016-03-01

PDF

637

被引次数

6

摘要： 在大规模的电池储能应用中,单体电池需要串并联应用,以使电压和容量达到要求,而生产,使用过程中的差异导致电池单体的不一致性是影响储能电站寿命的主要因素之一.储能电池在长期充放电过程中,蓄电池组内各单体电压的离散性会逐渐变大,致使整组电池寿命下降甚至失效,因此普遍采取各种均衡电路降低电池不一致性的影响.本文对几种常用的蓄电池组均衡电路做了简单的比较,包括能量耗散型均衡电路和能量非耗散型均衡电路,着重对开关电容法工作原理及其工作效率进行了分析,得出开关电容法的均衡效率与电池初始状态有关,而与电容容值大小无关等结论.

关键词: 电池储能, 均衡电路, 开关电容, 均衡效率

Abstract: For the large-scale energy storage applications, the cells need to be in series/parallel to get the required voltage and capacity. The inconsistency of the cells due to the manufacturing process and using is one of the main factors affecting the service life of energy storage unit. In the charging and discharging process of battery for long-term energy storage applications, the difference of the voltage of cells will gradually become larger, leading to the fading of battery or even failure. Various kinds of equalization circuits are applied to reduce the influence of battery inconsistency. In this paper, a comparison of several kinds of commonly used battery equalization circuit, including the energy dissipation balance circuit and non-dissipative equalization circuit was made, emphasizing on the working principle of the switched-capacity method and analyses its efficiency. It is noted that the balance efficiency of the switching capacitor method is related to the initial state of the battery and not to the capacitance values of the capacitor.

Key words: battery energy storage, equalization circuit, switched-capacitor, balancing efficiency

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