锂离子电池热物性参数测量方法综述  

Thermophysical Parameter Measurements for Lithium-Ion Batteries: A Review

作　　者：程夕明[1] 唐宇 王寿群 CHENG Ximing;TANG Yu;WANG Shouqun(National Engineering Laboratory for Electric Vehicles, Beijing Institute of Technology, Beijing 100081)

机构地区：[1]北京理工大学电动车辆国家工程试验室

出　　处：《机械工程学报》2019年第14期140-150,共11页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51677006);国家重点研发计划(2018YFB0106)资助项目

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。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.

关 键 词：锂离子电池 比热容 导热系数 量热试验 

分 类 号：TM912[电气工程—电力电子与电力传动]