超载 Ni/MH 电池的热行为与微热量计被学习。电池与一个石英频率温度计在微热量计在一台特殊设备被安装。热的数量和以不同的率以充电(SOC ) 的不同状态为充电的电池的热能力被微热量计测量。基于一系列 assumputions,热转移方程被建立。热产生的表示被曲线适合而不是理论计算达到。热模型被用来模仿在负责的电池的热行为时期,计算和实验的结果匹配很好。因为差的传导性在控告过程期间限制热转移,温度分发是不一致的。因为它与在包括电极的电池内的材料有关,极大地改进电池的热传导性是困难的,隔板等等。因此,高率充电应该在实际使用被避免。它可以引起某损坏到电池。
Thermal behavior of overcharged Ni/MH battery is studied with microcalorimeter. The battery is installed in a special device in a microcalorimeter with a quartz frequency thermometer. Quantity of heat and heat capacity of the battery charged at different state of charge (SOC) at different rates are measured by the microcalorimeter. Based on a series of assumputions, heat transfer equation is set up. Expression of heat generation is attained by curve fitting instead of theoretical calculation. Thermal model is used to simulate thermal behavior of the battery in charging period, results of calculation and experiment match very well, The temperature distribution is non-uniform because the poor conductivity limits the heat transfer during charging process. It is difficult to greatly improve the heat conductivity of the battery because it is related to materials inside the battery including electrodes, separators and so on. Therefore, high rate charge should be avoided in actual use. It may cause some damage to the battery.