Abstract: Based on the analysis of heat generation behavior of power battery in a large current discharge mode，a thermal management system using heat pipe as cooling unit was designed and built. The variation tendency of temperature for the power batteries in the module were investigated during the battery discharge process by using natural and forced convection air cooling as well as heat pipe cooling. The results indicated that MH-Ni power battery equipped with heat pipe had an effective cooling result.This system ensured battery pack meet the optimal operating temperature range and realize the uniform temperature distribution in the module. Compared with the natural and forced convection air cooling，the heat pipe cooling battery pack discharged at a current of 3728 mAh could decrease the temperature rise by 10 ℃ approximately and the temperature could be kept below 43 ℃ after eight-minutes discharging.

摘要： 基于对动力电池在大负荷运行模式下的产热行为分析，组装了一种采用热管式冷却的电池热管理系统。在空气自然对流、强制对流和热管冷却3种模式下，研究了电池模块中各电池在放电过程的温度变化趋势。结果表明，镍氢MH-Ni动力电池采用热管式冷却方式具有良好的冷却效果，可确保电池在最佳的工作温度范围内运行，并且具有拉平电池温度的能力。与自然冷却及强制对流冷却相比，在3728 mA电流放电情况下，热管冷却方式使电池温升最多可以降低10 ℃左右；持续放电8 min后电池温度也不超过43℃。