储能科学与技术 ›› 2021, Vol. 10 ›› Issue (1): 349-354.doi: 10.19799/j.cnki.2095-4239.2020.0251

• 储能系统与工程 • 上一篇    下一篇

退役动力锂电池在光储微电网的集成与应用

徐余丰1, 严加斌2, 何建明1, 琚正伟1, 程革2, 郑达2, 邹印龙2, 叶磊2, 王建新3   

  1. 1.浙江辉博电力设备制造有限公司，浙江 衢州 324407
    2.宁波中科孚奇能源科技有限公司
    3.中国科学院宁波材料技术与工程研究所，浙江 宁波 315201
  • 收稿日期:2020-07-15 修回日期:2020-07-30 出版日期:2021-01-05 发布日期:2021-01-08
  • 作者简介:徐余丰（1972—），男，硕士研究生，高级工程师，分布式
  • 基金资助:
    宁波市科技创新2025重大专项-分布式储能电站关键技术及工程示范项目(2018B10024)

Integration and application of retried LIBs in photovoltaic and energy storage micro grid

Yufeng XU1, Jiabin YAN2, Jianming HE1, Zhengwei JU1, Ge CHENG2, Da ZHENG2, Yinlong ZOU2, Lei YE2, Jianxin WANG3   

  1. 1.Zhejiang Huibo Power Equipment Manufacturing Co. Ltd. , Quzhou 324407, Zhejiang, China
    2.Ningbo Zhongke Fuqi Energy Technology Co. Ltd.
    3.Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, Zhejiang, China
  • Received:2020-07-15 Revised:2020-07-30 Online:2021-01-05 Published:2021-01-08

RichHTML

28

PDF

249

摘要：

为实现退役动力锂电池在光储微电网系统中的集成与应用，从整包利用的角度出发，检查80 V-60 A·h电池包的外观、铭牌、开路电压、BMS通讯情况对其进行初选，通过充放电测试对电池包完成二次筛选，并依据容量大小对电池进行分组，结合多通道储能变流器将电池成组，应用于光储微网系统中。结果显示：80个电池包有8个存在外观、开路电压和BMS通讯问题，22个存在容量和CD-OCV曲线异常。剩余50个电池包容量最大值为49.46 A·h，容量最小值为45.58 A·h，极差值为3.88 A·h，占额定容量的6.5%，一致性较好；在0.1、0.2、0.3、0.5 C等不同倍率下对电池进行充放电，成组后的电池CD-OCV曲线离散度较小；按0.05 C倍率充电、0.1 C倍率放电进行削峰填谷，充电量为111 kW·h，放电量为103 kW·h，转化效率92.79%。表明筛选和成组后的电池充放电性能正常，具备梯次利用价值。

关键词: 退役动力锂电池, 整包利用, 光储微电网

Abstract:

To fulfill integration and application of retired Li-ion batteries in a PV and energy storage micro grid system, from the perspective of whole package using, checking appearance, nameplate, open circuit voltage (OCV), BMS communication of the 80 V-60 A·h batteries for initial filtration, then finishing second filtration through charging and discharging batteries, sorting batteries in accordance with valid capacity, grouping batteries by multichannel power conversion system (PCS), then applying in a PV and energy storage micro grid system. The results show the following: There are eight batteries that have a problem with appearance, OCV, or communication of the BMS, and 22 batteries also cannot be reused due to the capacity and the CD-OCV curve being unqualified. In the 50 remaining batteries, the maximum capacity is 49.46 A·h, and the minimum capacity is 45.58 A·h; so, the difference in value is 3.88 A·h, which is only 6.5% of the rated capacity, meaning these batteries present good uniformity. By charging and discharging under different rates, such as 0.1, 0.2, 0.3 and 0.5 C, the dispersion of the CD-OCV curves is small after grouping; when charging at a rate of 0.05 C and discharging at a rate of 0.1 C for peak cutting and valley filling, the charging energy is 111 kW·h and the discharging energy is 103 kW·h; so, the efficiency is 92.79%. This shows that the characteristics of the batteries are normal after filtrating and grouping, and the batteries have cascade utilization value.

Key words: retired Li-ion battery, whole package use, photovoltaic and energy storage micro gird

中图分类号: