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首页> 外文期刊>SAE International Journal of Passenger Cars - Electronic and Electrical Systems >Design and Thermal Analysis of a Passive Thermal Management System Using Composite Phase Change Material for Rectangular Power Batteries
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Design and Thermal Analysis of a Passive Thermal Management System Using Composite Phase Change Material for Rectangular Power Batteries

机译：复合相变材料用于矩形动力电池的无源热管理系统的设计和热分析

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摘要

A passive thermal management system (TMS) using composite phase change material (PCM) for large-capacity, rectangular lithium-ion batteries is designed. A battery module consisting of six Li-ion cells connected in series was investigated as a basic unit. The passive TMS for the module has three configurations according to the contact area between cells and the composite PCM, i.e., surrounding, front-contacted and side-contacted schemes. Firstly, heat generation rate of the battery cell was calculated using the Bernardi equation based on experimentally measured heat source terms (i.e. the internal resistance and the entropy coefficient). Physical and thermal properties such as density, phase change temperature, latent heat and thermal conductivity of the composite PCM were also obtained by experimental methods. Thereafter, thermal response of the battery modules with the three TMS configurations was simulated using 3D finite element analysis (FEA) modeling in ANSYS Fluent. Simulation results show that, when PCM is adequate, surrounding and front-contacted schemes are better than the side-contacted scheme in battery temperature control. While when PCM is not adequate under continuous 3C charge-discharge cycle, front-contacted and side-contacted schemes show a better performance in PCM utilization rate in the late period of melt process than the surrounding scheme due to a higher heat conduction rate from the cells to the PCMs. This paper is expected to provide useful guidelines for the design of the passive TMS in rectangular power battery applications.
机译：设计了一种使用复合相变材料（PCM）的无源热管理系统（TMS），用于大容量矩形锂离子电池。作为基本单元，研究了由六个串联连接的锂离子电池组成的电池模块。模块的无源TMS根据单元与复合PCM之间的接触面积具有三种配置，即环绕，正面接触和侧面接触方案。首先，基于实验测量的热源项（即内阻和熵系数），使用伯纳迪方程来计算电池单元的发热率。还通过实验方法获得了复合PCM的物理和热学性质，例如密度，相变温度，潜热和导热率。此后，使用ANSYS Fluent中的3D有限元分析（FEA）建模来模拟具有三种TMS配置的电池模块的热响应。仿真结果表明，当PCM足够时，在电池温度控制中，周围接触和正面接触方案要优于侧面接触方案。当在连续的3C充放电循环下PCM不足时，由于在热熔过程中较高的热传导率，前接触和侧接触方案在熔融过程的后期显示出比周围方案更好的PCM利用率。信元到PCM。预期本文将为矩形动力电池应用中的无源TMS设计提供有用的指导。

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