锂离子电池液冷管路优化

锂离子电池热管理系统是提高冷却效率的关键。针对车载锂离子电池的液冷通道管路，对其进行设计优化，建立了相应的数值模型，并通过实验验证了数值模型的可行性。研究结果表明：微通道冷却系统在高倍率放电下，可以将电池的温差从9.74 K降低至4.71 K，最高温度从309.74 K降低至305.13 K，都在最佳工作范围之内。通过对冷却液温度的研究发现，只通过降低冷却液温度并不能改善电池的温度环境，需要一个合适的温度来保障电池的温差，并且冷却液温度与电池的温差呈现出线性关系，电池的温差随着冷却液的温度降低而增大。

Optimization of Liquid Cooling Pipeline for Lithium-Ion Batteries

Due to the fact that the thermal management system of lithium-ion batteries is the key to the improvement of cooling efficiency, a corresponding numerical model has been established to optimize the design of the liquid cooling channel pipeline for vehicle lithium-ion batteries, with the feasibility of the numerical model to be demonstrated through experimental verification. The results show that under a high-rate discharge, the microchannel cooling system can reduce the temperature difference of the battery from 9.74 K to 4.71 K and the maximum temperature from 309.74 K to 305.13 K, both within the optimal operating range. A research on the coolant temperature reveals that an improvement of the temperature environment of the battery cannot be achieved by simply reducing the coolant temperature. A suitable temperature is needed to ensure the temperature difference of the battery, with a linear relationship between the coolant temperature and the temperature difference of the battery. Meanwhile, the temperature difference of the battery increases as the coolant temperature decreases.