泡沫铜在锂电池组热管理中的实验研究

Experimental study of the thermal management system for lithium-ion battery pack using copper foam

泡沫金属具有增强换热的作用,为分析泡沫金属在锂电池散热中的影响,在两种不同流动状态下,调整电池放电电流,研究不同孔结构特征对电池散热的影响。结果表明:泡沫金属加强了电池的散热;在强迫对流下,孔隙率相同,孔密度增加,电池散热效果减弱;在孔密度相同时,孔隙率减小,电池散热效果加强;在自然对流下,孔隙率相同,孔密度增加,电池散热效果加强;孔隙率90%、孔密度为20PPI的泡沫铜的散热性能最好。

Foam metal can enhance heat transfer.Under the two different flow conditions,the discharge current of the bat- tery was ehanged,and the effect of different pore structure characteristics on the heat dissipation of the battery was studied.Re- suits show that foam metal strengthens the heat dissipation of the battery ;Under forced convection,with the increase of pore den- sity PPI,the heat dissipation effect of the battery is weakened at the same pore porosity.With the decrease of pore porosity,the heat dissipation effect of the battery is strengthened at the same pore density PPI;In the natural convection,the porosity is the same,the pore density PPI increases,and the heat dissipation effect of the battery is strengthened.From the view point of overall performance,copper foam with pore density of 20 PPI,90% porosity is a clear optimum.