汽车工程 ›› 2023, Vol. 45 ›› Issue (2): 183-190.doi: 10.19562/j.chinasae.qcgc.2023.02.003

所属专题: 新能源汽车技术-动力电池&燃料电池2023年

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分层优化测定锂离子电池比热容参数的实验研究

吕又付1(),罗卫明1,陈荐1,吴锡鸿2,李传常1   

  1. 1.长沙理工大学能源与动力工程学院,长沙  410114
    2.广东省特种设备检测研究院顺德检测院,顺德  528300
  • 收稿日期:2022-07-19 修回日期:2022-08-28 出版日期:2023-02-25 发布日期:2023-02-21
  • 通讯作者: 吕又付 E-mail:lvyoufufighting@163.com
  • 基金资助:
    湖南省教育厅科研项目(20C0044);湖南省自然科学基金(2022JJ40487);广东省分布式能源系统重点实验室开放基金(2020B1212060075)

An Experimental Investigation on Determination of Specific Heat Capacity of Lithium-ion Batteries by Hierarchical Optimization

Lü Youfu1(),Weiming Luo1,Jian Chen1,Xihong Wu2,Chuanchang Li1   

  1. 1.School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha  410114
    2.Guangdong Institute of Special Equipment Inspection and Research Shunde Branch,Shunde  528300
  • Received:2022-07-19 Revised:2022-08-28 Online:2023-02-25 Published:2023-02-21
  • Contact: Lü Youfu E-mail:lvyoufufighting@163.com

摘要:

锂离子电池比热容作为电池模组及系统热设计的关键参数,对所建立的电池热管理系统仿真模型和控制策略的准确性至关重要。本文中基于量热法搭建了一个成本低廉、实施简单和测量准确性高的测试平台,系统研究了量热装置的热损失、量热方式以及分层计算优化对测试结果的影响。在黄铜、304不锈钢、铸铁以及高密度聚乙烯标准件样品校验测试中,实验结果表明该量热装置测定比热容误差小于3%,且不受被测样品导热系数大小的影响。通过本实验装置测定32650磷酸铁锂电池的平均比热容为1.022 J·g-1·K-1,这为其他类型电池甚至下一代固态电池精确测量比热容热物性参数提供了一种可行的方法。

关键词: 锂离子电池, 比热容, 量热法实验, 分层计算优化

Abstract:

As a key parameter of battery module and system thermal design, the specific heat capacity of lithium-ion batteries has a significant impact on the accuracy of the simulation model and control strategies of the established battery thermal management system. Based on the calorimetric method, a test platform with low cost, simple implementation and high measurement accuracy is established. The influence of heat loss, calorimetric method and hierarchical optimization of the calorimetric device on the test results is systematically studied. In the sample calibration test of brass, 304 stainless steels, cast iron and high-density polyethylene standard parts, the experimental results show that the specific heat capacity error of the calorimetric device is less than 3%, and it is not affected by the thermal conductivity of the test sample. The average specific heat capacity of 32650 LiFePO4 batteries is determined to be 1.022 J·g-1·K-1 by this experimental device, which provides a feasible method to accurately measure the thermal physical parameters of specific heat capacity of other types of batteries and even next-generation solid-state batteries.

Key words: lithium-ion batteries, specific heat capacity, calorimetric experiment, hierarchical optimization