一种高倍率快充式液冷电池包系统设计开发

Design for a High-Rate Fast Charging Liquid-Cooled Battery Package System

针对纯电商用客车设计一种高倍率快充式电池包系统,通过在电池包前面板采用集成模块,提高了电池包的安全性和安装效率,并依据模组中双侧冷却方式,可大幅提高冷却效果。此外,在液冷管路中采用异向水路方式,可降低各个支路流阻差异,从而优化各个模组间的温度偏差。通过系统循环试验,发现该液冷电池包在2C的充电倍率下,其液冷效果显著,可保持在合理的温度范围内工作。

In this paper, a type of high-rate fast charging battery pack system was designed for the pure electric commercial buses. The safety and installation efficiency of the battery pack were improved by adopting integrated module on the front panel, and an obviously cooling effect of battery pack was obtained through a double-sided cooling method in the module. In addition, the difference of flow resistance for each branch was reduced by using the anisotropies' water method in the liquid-cooling pipeline. Thereby, the temperature deviation between the modules was optimized. In order to verify the feasibility of the system, a cycle test for the system was carried out. It was found that the liquid-cooled battery pack system presents remarkable liquid-cooling effect at a charging rate of 2C and can keep working within reasonable temperature range.