变接触面圆柱形锂电池组液冷散热的热特性

Thermal characteristics of liquid cooling of cylindrical lithium battery with variable contact surface

设计了一种液冷散热的新方法,考虑到沿液冷管道,经过热量的累积,末端的温度高于前端,因此在沿流道方向设定接触面积阶梯变化的散热铝块,电池热量通过铝块传递到液冷管道,显著改善温度的均匀性。采用STAR-CCM+软件模拟的方法,对比接触面变化与等接触面的热性能,结果显示,相对于接触面积恒定的模组,变接触面积的模组冷却效率提高4.82%,温度一致性程度降低1.1℃。

A new method of liquid cooling heat dissipation was designed,considering that the temperature of the end was higher than that of the front end after heat accumulation along the liquid cooling pipe.Therefore,when the aluminum block with step change of contact area was set along the flow channel,the battery heat was transferred to the liquid cooling pipe through the aluminum block,which significantly improved the temperature uniformity.The results show that compared with the module with constant contact area,the cooling efficiency of the module with variable contact area increases by 4.82%,and the degree of temperature consistency decreases by 1.1℃.