电池系统热管理控制策略与能耗评估研究

Research on Thermal Management Control Strategy and Energy Consumption Evaluation of Battery System

电池系统中合适的热管理控制策略对于提高整车的能量利用效率具有重要意义。文章基于验证的仿真模型进行能耗与策略评估。结果表明控制水温过高或者过低都会导致热管理能耗的增加,控制水温存在最优解;控制流量在一定范围内,热管理能耗随流量的增大而增大。另外,文章基于热管理能耗、恒温占比、温降速率三个性能指标,采用加权综合法评价不同水温策略;不同水温策略方案对比表明控制水温为20℃时,其综合性能评价值最高。

The appropriate thermal management control strategy in the battery system is of great significance for improving the energy utilization efficiency of the vehicle. This paper evaluates the energy consumption and strategy based on the verified simulation model. The results show that the control water temperature is too high or too low will lead to the increase of thermal management energy consumption, and there is an optimal solution for controlling water temperature;The control flow is within a certain range, and the thermal management energy consumption increases with the increase of flow. In addition, based on the three performance indicators of thermal management energy consumption, constant temperature ratio and temperature drop rate, this paper adopts weighted comprehensive evaluation method to judge the advantages and disadvantages of different water temperature strategies;the result shows that when the water temperature is controlled at 20℃, the comprehensive performance evaluation value is the highest.