采用铝基注塑电池架改善电池舱段散热效果的研究

摘要

When the battery compartment of an underwater vehicle continuously works at high voltage, large heat i9 accumulated and may cause short circuit, electrolyte leaking, explosion and other safety problems of lithium/thionyl chloride battery. Sections 1 through 3 of the full paper explain the improvement mentioned in the title, which we believe is successful and whose core consists of; (1 ) we establish the mathematical model of heat transfer of the battery compartment; (2) when the battery compartment uses the aluminium-based and plastics-covered heat-conductive battery framework and is transferring heat for 5 hours running at 23 A, we measure the transient temperature and temperature distribution inside the battery compartment; section 3 uses the FLUENT software to simulate the transient temperature and temperature distribution inside several types of battery framework; the simulation results, presented in Figs. 7 through 11, and their comparison with experimental data and computational data show preliminarily that the use of the aluminium-based and plastics-covered heat-conductive battery framework can indeed greatly reduce the maximum temperature inside the battery compartment to less than 70 ℃, thus meeting the temperature control requirements of the battery compartment of the underwater vehicle.%当水下航行器电池舱段长时间大电流工作时,会产生大量热量,如果热量不能被快速传递到外界环境时,容易导致电池舱段内部单体电池发生短路、泄放和爆炸等安全事故[1,2],所以研究采用铝基注塑电池架改善电池舱段散热效果的可行性非常必要.首先建立了电池舱段热传递的数学物理模型；其次当电池舱段采用铝基导热塑料电池架以23 A恒流连续工作5h时,对其内部瞬态温度和温度分布情况进行了试验测量；最后在FLUENT环境下,对几种电池架的辅助散热能力进行了数值计算.通过仔细对比试验结果和仿真结果发现,采用铝基导热塑料电池架能够显著降低电池舱段内部最高温度,满足该型水下航行器电池舱段在温度控制方面的工程要求(≤70℃),且具有一定的温度裕量.