东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (9): 1323-1329.DOI: 10.12068/j.issn.1005-3026.2019.09.019

• 机械工程 • 上一篇    下一篇

基于电-热-老化耦合模型的自适应多段恒流充电研究

李夔宁1,2， 张宏济1,2， 谢翌3， 傅春耘3   

  1. (1. 重庆大学 低品位能源利用技术及系统教育部重点实验室， 重庆400044; 2. 重庆大学 能源与动力工程学院， 重庆400044; 3. 重庆大学 汽车工程学院， 重庆400044)
  • 收稿日期:2018-09-03 修回日期:2018-09-03 出版日期:2019-09-15 发布日期:2019-09-17
  • 通讯作者: 李夔宁
  • 作者简介:李夔宁(1970-)，男，重庆巫溪人，重庆大学教授，博士生导师.
  • 基金资助:
    国家重点研发计划项目(2018YFB0106102，2018YFB0106104)； 重庆市重点产业共性关键技术创新专项(No.cstc2017zdcy-zdzx0021，No.cstc2017zdcy-zdyf0139).

Study on Self-Adaptive Multistage Constant Current Charging Based on Electro-Thermal-Aging Coupling Model

LI Kui-ning1,2， ZHANG Hong-ji1,2， XIE Yi3， FU Chun-yun3   

  1. 1. Key Laboratory of Low-Grade Energy Utilization Technologies and Systems， Ministry of Education， Chongqing University， Chongqing 400044， China; 2. School of Energy and Power Engineering， Chongqing University， Chongqing 400044， China; 3. School of Automotive Engineering， Chongqing University， Chongqing 400044， China.
  • Received:2018-09-03 Revised:2018-09-03 Online:2019-09-15 Published:2019-09-17
  • Contact: LI Kui-ning
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摘要： 基于一阶RC等效电路模型、热网络法以及老化模型建立了锂离子电池的电-热-老化耦合的多状态联合估计模型，采用粒子群优化算法建立阶数自适应的多段恒流充电策略.通过构建充电时间-电池寿命的帕累托边界曲线，得到了电池最短充电时间(β=1)、最小老化(β=0)及平衡(β=0.02)充电三种充电策略，并与CC-CV充电策略进行了对比.结果表明，最短时间充电与2C CC-CV具有很高的一致性.最小老化充电与0.1C CC-CV充电的老化损失都很小，但前者缩短了61.7%的充电时间.平衡充电策略相比于最小老化策略，仅牺牲0.06%SOH，缩短71.19%的充电时间.相比于0.5C CC-CV充电策略，平衡充电策略的充电时间减少了44.9%.

关键词: 锂离子电池, 电-热-老化耦合模型, 自适应多段恒流, 粒子群优化算法, 帕累托边界

Abstract: An electro-thermal-aging coupling multi-state joint-estimation model of lithium-ion batteries was built based on the first-order RC equivalent circuit model， the thermal network method and the aging model. Particle swarm optimization(PSO) algorithm was adopted to establish a self-adaptive multistage constant current(SMCC)charging strategy whose stages were adaptive to the objective function. By constructing the Pareto frontier of charging time and battery life， three charging strategies， including the minimum-time charge， the minimum-aging charge and the balanced charge， were obtained. Then they were compared with the CC-CV charges. The results show that the minimum-time charge is highly consistent with the 2C CC-CV. The aging losses of the minimum-aging charge and the 0.1C CC-CV are very small， but the former reduces charging time by 61.7%. Compared with the minimum-aging charge， the charging time of the balanced charge is reduced by 71.19% at the expense of 0.06%SOH. Compared with the 0.5C CC-CV charge， the charging time of the balanced charge is reduced by 44.9%.

Key words: lithium-ion batteries, electro-thermal-aging coupling model, SMCC(self-adaptive multistage constant current), particle swarm optimization(PSO) algorithm, Pareto frontier

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