车用磷酸亚铁锂电池的热特性与热物性研究*

doi:10.19562/j.chinasae.qcgc.2019.010.007

摘要/Abstract

摘要： 本文中通过实验和仿真,研究了车用动力磷酸亚铁锂电池的热特性与热物性。首先通过实验测试了电池的内阻和熵权系数,并采用Bernardi方程计算了电池的时变热源。接着采用量热桶和瞬态热线导热仪测试了电池的比热容和热导率等热物性参数。最后,考虑了自然对流和热辐射边界条件,采用CFD软件对电池单体和模组的温升特性进行仿真。结果表明,高温环境下的电池温升幅度较低温下的小,自然对流条件下电池模组的均温性较差,需要良好的热管理策略。

关键词: 磷酸亚铁锂动力电池, 热特性, 热物性, 实验测试, 数值仿真

Abstract: The thermal characteristics and thermal properties of a vehicular lithium ferro phosphate traction batterie is studied by experimental measurement and numerical simulation in this paper. Firstly, the internal resistance and entropy weight coefficient of battery are measured by experiments and Bernardi equation is adopted to calculate the time-varying heat source of battery. Then the calorimeter and transient hot-wire thermal conductivity tester are used to measure thermal property parameters such as the specific heat capacity and thermal conductivity of battery. Finally, a simulation on the temperature rise characteristics of both the cell and the module is conducted by using CFD software with consideration of the boundary conditions of natural convection and thermal radiation. The results show that the temperature-rise under high temperature environment is less than that under low temperature, and under the natural convection condition, the battery module has poorer temperature evenness so needs a better thermal management strategy

Key words: lithium ferro phosphate traction battery; thermal characteristics; thermal properties; experimental measurement; numerical simulation

盛雷,徐海峰,苏林,张恒运. 车用磷酸亚铁锂电池的热特性与热物性研究^*[J]. 汽车工程, 2019, 41(10): 1152-1157.

Sheng Lei, Xu Haifeng, Su Lin & Zhang Hengyun. A Study on Thermal Characteristics and Thermal Properties of Vehicular Lithium Ferro Phosphate Traction Battery[J]. Automotive Engineering, 2019, 41(10): 1152-1157.

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车用磷酸亚铁锂电池的热特性与热物性研究^*

A Study on Thermal Characteristics and Thermal Properties of Vehicular Lithium Ferro Phosphate Traction Battery

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