Abstract: In the heat dissipation modes of electronic components of pure electric vehicles, the liquid cooling method has better heat dissipation and cooling effect. The liquid cooling plate can control the working temperature of electronic components within the ideal range, and the noise is relatively low. This paper studies the commonly used liquid cooling plate, improves the traditional radiator in the form of impact cooling, compares the impact radiator with the traditional radiator, and discusses the pressure drop loss, pump power and substrate heat distribution between them in detail. The results show that the impact radiator has better heat dissipation performance. When the pump power is 0.2 W, the thermal resistance is reduced by 19.5%.

Key words: Pure electric vehicle; Impact heat dissipation; Pump-power; Thermal resistance

摘要： 在纯电动汽车电子部件散热方式中，用液冷的方法来散热冷却效果更好，水冷系统可 将电子组件的工作温度控制在理想范围内，噪音也相对较低。文章针对常用的液冷板开展研 究，采用冲击冷却的形式对传统散热器进行改进，并对冲击散热器和传统散热器进行了比较 研究，详细讨论两者之间的压降损失、泵功率、基底的热分布。结果显示，冲击散热器具有 更好的散热性能，在泵浦功率 0.2 W 时，热阻降低了 19.5%。

关键词: 纯电动汽车；冲击散热；泵浦功率；热阻