欢迎访问《汽车安全与节能学报》，
汽车安全与节能学报

汽车安全与节能学报 ›› 2020, Vol. 11 ›› Issue (3): 397-405.DOI: 10.3969/j.issn.1674-8484.2020.03.016

• • 上一篇    下一篇

锂离子电池宽温度区间无析锂快充策略

周旋 1 ，周萍 1 ，郑岳久 1* ，韩雪冰 2 ，褚政宇 2 ，刘金海 1 ，杨映华 3 ，薛钢 4   

  1. (1. 上海理工大学 机械工程学院，上海 200093，中国；2. 汽车安全与节能国家重点实验室，清华大学，北京 100084，中国；3. 北京新能源汽车股份有限公司，北京 100176，中国；4. 苏州玛瑞柯测试科技有限公司，苏州 215010，中国 )
  • 收稿日期:2020-05-12 出版日期:2020-09-30 发布日期:2020-10-20
  • 通讯作者: 郑岳久 (1986—)，男 ( 汉 )，上海，副教授。E-mail: Yuejiu_zheng@163.com。
  • 作者简介:第一作者 / First author ： 周旋 (1995—)，男 ( 汉），江苏，硕士研究生。E-mail: zhouxuanhwh@163.com。 第二作者 / Second author ： 周萍 (1964—)，女 ( 汉），上海，副教授。E-mail: zhouping@usst.edu.cn。
  • 基金资助:
    国家自然科学基金项目 (51877138) ；上海市青年科技启明星 (19QA1406200)。

Strategy of fast charging of lithium-ion batteries without lithium plating in a wide temperature range

ZHOU Xuan1 , ZHOU Ping1 , ZHENG Yuejiu1* , HAN Xuebing2 , CHU Zhengyu2 , LIU Jinhai1 , YANG Yinghua3 , XUE Gang4   

  1. (1. College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China ；2. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China; 3. BAIC New Energy Co., Ltd., Beijing 100176, China; 4. Suzhou MASRC Testing Technology Co., Ltd., Suzhou 215010, China)
  • Received:2020-05-12 Online:2020-09-30 Published:2020-10-20

PDF

624

摘要： 为解决锂离子电池快充中存在的安全问题，提出一种标定动力锂离子电池无析锂快充电流 Map 图的方法。采用参比电极作为监测负极电位的手段，依据电势判据设立不析锂负极电位阈值，通 过调节不同充电起始温度点，获取 5 条不同起始温度点的快充策略曲线，运用分段线性插值方法， 得到荷电状态 -温度- 电流等高线图 (SOC-T-I Map)。为了验证 Map 图的快速性和无析锂，设计快 速性对比实验和 25 ℃快充策略循环实验。结果表明，25 ℃快充策略比 25 ℃恒流 1 C、1.5 C 充电 时间分别缩短 45.3%、18.0% ；200 次快充循环后，弛豫电压微分曲线无极小值且电池维持 99.7% 的 容量保持率，表明无金属锂析出。该文标定电流 Map 图的方法提供了挖掘电池快充能力的思路，并且 标定的 Map 图适合电动汽车在多种不同工况下快充。

关键词: 电动汽车, 锂离子电池, 无析锂快充, 参比电极, 荷电状态 -温度-电流等高线图（SOC-T-I Map）

Abstract:  A calibration method of fast charging map without lithium plating for power lithium-ion battery was proposed to solve the safety problem of lithium-ion battery fast charging. Based on the potential criterion, the threshold value of negative electrode potential without lithium plating was set up by using the reference electrode to monitor the negative potential. Five fast charging strategy curves were obtained by adjusting different charging initial temperature points. State of change-temperature-current contour map (SOC-T-I Map) is obtained with piecewise linear interpolation method. The contrast experiment of rapidity and the cycle experiment of 25 ° C fast charging strategy were designed to verify the map's rapidity and no lithium plating. The results show that the fast charging strategy is 45.3% and 18.0% shorter than that of constant current 1 C and 1.5 C at 25 ° C. After 200 fast charging cycles, the differential curve of relaxation voltage has no minimum value, and the battery maintains a capacity retention rate of 99.7%, indicating that there is no metal lithium plating. The method of calibrating the current map provides the idea of mining the fast charging ability of the battery, and the calibrated map is suitable for fast charging of electric vehicles under diffident working conditions. 

Key words: electric vehicles, lithium-ion battery, fast charging without lithium plating, reference electrode, state of change-temperature-current contour map (SOC-T-I Map) 

中图分类号: