• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (14): 140-150.doi: 10.3901/JME.2019.14.140

• 可再生能源与工程热物理 • 上一篇    下一篇

锂离子电池热物性参数测量方法综述

程夕明, 唐宇, 王寿群   

  1. 北京理工大学电动车辆国家工程试验室 北京 100081
  • 收稿日期:2018-09-26 修回日期:2019-03-25 出版日期:2019-07-20 发布日期:2019-07-20
  • 通讯作者: 程夕明(通信作者),男,1970年出生,博士,副教授。主要研究方向为(智能)电动汽车电池系统建模、仿真与控制,包括电池状态估计和电池热分析。E-mail:cxm2004@bit.edu.cn
  • 基金资助:
    国家自然科学基金(51677006)和国家重点研发计划(2018YFB0106)资助项目。

Thermophysical Parameter Measurements for Lithium-Ion Batteries: A Review

CHENG Ximing, TANG Yu, WANG Shouqun   

  1. National Engineering Laboratory for Electric Vehicles, Beijing Institute of Technology, Beijing 100081
  • Received:2018-09-26 Revised:2019-03-25 Online:2019-07-20 Published:2019-07-20

摘要: 锂离子电池的比热容和导热系数是电池热管理系统建模、仿真与控制的必要的热物性参数,是决定模型性能的关键因素。采用参数集总平均方法计算的电池热物性参数依赖电池的化学物理成份、机械结构、材料尺寸和制造工艺等,其准确性和适应性存在问题。通过文献调查,归纳总结锂离子电池的比热容和导热系数的测量方法及其影响因素。分析表明,电池比热容和导热系数常采用独立的试验进行测量,可分为标准仪器(程序)法和自制测量装置法,成本、复杂性、测量误差存在差异。电池比热容和导热系数受到包括电芯材料、形状、容量、SOC、SOH和温度等的影响,比热容与电池形状密切相关,而导热系数受到SOH的影响更严重。测量锂离子电池的热物性参数的方法应具有可重复标定、低成本、装置体积小、结构简单和影响因素充分考虑的特点。

关键词: 比热容, 导热系数, 锂离子电池, 量热试验

Abstract: Thermophysical parameters of lithium-ion batteries are the basis for building battery thermal models and one of core factors to determine model performance. The lumped parameter method depends on constitutions, structures, dimensions, techniques, and etc. so that the calculated battery specific heat capacity and themal conducticity have bad accuracies and adaptabilities. Hence, measurements and factors of thermophysical parameters of lithium-ion batteries are generalized and analysized through literature investigation. Results show that battery specific heat capacity and themal conductivity measurements were conducted seperatedly, of which methologies are categorised as the standard instrument (program) method and self-made test apparatuse mehtod. Their measurement costs, complexities, and errors are different. Furthermore, these battery thermophysical parameter values are influenced by kinds of factors such as cell materials, shapes, capacities, SOCs, SOHs, and temerpatures. The specific heat capacity is closely related to battery shapes, and the themal conductivity significantly changes with battery SOHs. In summary, to measure battery thermophysical parameters should be scaled, small, simple, adaptable, and low cost.

Key words: calorimetric experiment, lithium-ion battery, specific heat capacity, thermal conductivity

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