Abstract Efficient and effective thermal management of Li-ion battery pack for electric vehicle application is vital for the safety and extended-life of this energy storage system. In this paper, the thermal management system of a battery module is presented as an integral part of the electric vehicle air conditioning system. The refrigerant is bifurcated from the main system through a pipe and expansion valve and guided to the battery module compartment consisting of 64 18650-type Li-ion battery arranged in the form of 8 × 8 array. Several experimental strategies such as expansion valve throttle level, thermostat sensitivity and proportional-integral-derivative (PID) control algorithm are investigated. The results indicate that a larger openness of the throttling valve avoids superheating of the refrigerant and maintains the maximum temperature difference in the battery module around 2 °C. Additionally, thermostat sensitivity and PID control algorithm is found to be able to offer effective thermal management for an electric vehicle battery pack.

中文翻译：

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电池热管理与车舱空调集成系统对锂离子动力电池进行温度控制

摘要 电动汽车应用锂离子电池组的高效热管理对于该储能系统的安全性和延长寿命至关重要。在本文中，电池模块的热管理系统作为电动汽车空调系统的一个组成部分。制冷剂通过管道和膨胀阀从主系统分叉，导向由8×8阵列排列的64节18650型锂离子电池组成的电池模块舱。研究了几种实验策略，例如膨胀阀节气门水平、恒温器灵敏度和比例积分微分 (PID) 控制算法。结果表明，较大的节流阀开度避免了制冷剂过热，并将电池模块中的最大温差保持在 2°C 左右。此外，发现恒温器灵敏度和 PID 控制算法能够为电动汽车电池组提供有效的热管理。