CIESC Journal ›› 2020, Vol. 71 ›› Issue (S2): 259-266.DOI: 10.11949/0438-1157.20200483

• Energy and environmental engineering • Previous Articles     Next Articles

Electro-thermal characteristics of retired LiFePO4 power battery module

Yiwei WANG1,4(),Wenjiong CAO1,Peng PENG1,Yaodong ZHENG2,Bo LEI3,Youjie SHI3,Fangming JIANG1()   

  1. 1.Laboratory of Advanced Energy Systems, CAS Key Laboratory of Renewable Energy, Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences (CAS), Guangzhou 510640, Guangdong, China
    2.China Southern Power Grid Company Ltd. , Guangzhou 510663, Guangdong, China
    3.Electric Power Research Institute, China Southern Power Grid Company Ltd. , Guangzhou 510663, Guangdong, China
    4.University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-05-06 Revised:2020-05-20 Online:2020-11-06 Published:2020-11-06
  • Contact: Fangming JIANG

退役LiFePO4动力电池模块电热特性

王亦伟1,4(),曹文炅1,彭鹏1,郑耀东2,雷博3,史尤杰3,蒋方明1()   

  1. 1.中国科学院可再生能源重点实验室,广东省新能源和可再生能源研究开发与应用重点实验室,中国科学院广州能源 研究所先进能源系统研究室,广东 广州 510640
    2.中国南方电网有限责任公司,广东 广州 510663
    3.南方电网科学研究院有限责任公司,广东 广州 510663
    4.中国科学院大学,北京 100049
  • 通讯作者: 蒋方明
  • 作者简介:王亦伟(1985—),男,博士研究生,助理研究员,wangyw@ms.giec.ac.cn
  • 基金资助:
    国家重点研发计划项目(2018YFB0905300);广东省重大科技专项项目(2017B01012003);广东省自然科学基金项目(2016A030313172);广东省自然科学基金-重大基础研究培育项目(2015A030308019);广州市科技计划项目(201804020020)

Abstract:

To improve the value of power battery modules retried from electric vehicles, and to decrease the utilization cost and mitigate the related environmental pollution, it is of great importance to study the cascade utilization of the retired power batteries. With respect to the scenario of applying the retired power battery for the electricity storage in power grid, we measured the capacity and studied experimentally the electric and thermal performance of a retired LiFePO4 battery module under various charge and discharge C-rates. Further, to ensure adequate uniformity in-between cells of the battery module during charging/discharging, we employed the active electric balancing strategy, and did a comparison study on the discharged electricity, and voltage and temperature behaviors during discharge, for the battery module having implemented the active-balance operation or not. The results indicate it benefits to the battery??s electro-thermal performance, lifespan, and safety if constraining the SOC of the battery module within a proper range during charge/discharge operations.

Key words: retired power lithium-ion battery, cascade utilization, capacity, temperature characteristic, heat transfer, safety, sustainability

摘要:

为提高电动汽车退役动力电池在其全寿命周期内的利用价值,降低电池的使用成本,缓解环境污染,退役电池梯次利用具有十分重要的意义。考虑电动汽车退役磷酸铁锂(LiFePO4)电池模组应用于电网储能场景,实验研究了退役电池模块的容量,充放电性能以及温度特性,同时为了最大限度地保证退役电池模块在充放电过程中的一致性,采用主动均衡,并对有/无均衡电池模组的放电电量、电压和温度进行对比研究。结果表明,将电池模块控制在一定的荷电状态(SOC)范围内进行充放电,可以提高电池模组整体的电热性能,延长退役电池模组的寿命,有效防止电池模块过充、过放以及热失控的发生。

关键词: 退役锂离子动力电池, 梯次利用, 容量, 温度特性, 传热, 安全, 可持续性

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