基于微小通道波形扁管的圆柱电池液冷模组散热特性

针对圆柱动力电池的散热特点，建立一种基于微小通道波形扁管的液冷电池模组. 采用电化学热模型对该模组的散热特性进行三维瞬态分析，通过改变波形扁管的通道数和接触角对液冷结构进行优化. 10通道的波形扁管散热优势明显，增大波形扁管的接触角可以提升液冷结构的散热效率并改善电池组温度分布均匀性. 当电池模组在35 °C环境下以1 C倍率放电时，即使质量流量低至4×10^?3 kg/s，使用接触角大于40°的10通道波形扁管可将电池组表面最高温度控制在40 °C以下，同时将温差控制在5 °C以内. 在优化工况下进行实验以验证该电池模组的换热性能. 仿真结果与实验值基本一致，这验证了微小通道波形扁管的散热有效性；仿真结果可为圆柱动力电池的热管理提供参考.

Heat dissipation characteristic of liquid cooling cylindrical battery module based on mini-channel wavy tube

A liquid cooling battery module based on mini-channel wavy tube was established considering the heat dissipation performance of cylindrical power batteries. Three-dimensional transient analysis of the heat dissipation performance was conducted for the proposed battery module by using electrochemical thermal model, and the channel quantity and contact angle of the wavy tube were changed to optimize the liquid cooling configurations. The 10-channel wavy tube shows apparent advantages; an increase in contact angle positively affects the heat dissipation efficiency of the liquid cooling configurations and improves the temperature field homogeneity of the battery module. When the battery module was discharged with 1 C rate at 35 °C, the maximum temperature and local temperature difference on the surfaces of the battery module can be respectively controlled below 40 °C and 5 °C by using the 10-channel wavy tube with a contact angle greater than 40° even at a low mass flow rate of 4×10^?3 kg/s. Experiments under optimized conditions were performed to validate the heat transfer performance of the battery module. The simulated results are consistent with the experimental values, thereby corroborating the heat dissipation effectiveness of the mini-channel wavy tube. The simulated results can provide specific reference values for the thermal management of cylindrical power battery modules.