Thermal behavior simulation of Ni/MH battery  

作　　者：LI DaHe YANG Kai CHEN Shi WU Feng 

机构地区：[1]Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China

出　　处：《Chinese Science Bulletin》2009年第9期1500-1506,共7页

基　　金：Supported by the National Key Basic Research and Development Program of China (Grant No. 2002CB211800)

摘　　要：Thermal behavior of overcharged Ni/MH battery is studied with microcalorimeter. The battery is in-stalled 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 meas-ured by the microcalorimeter. Based on a series of assumputions, heat transfer equation is set up. Ex-pression 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 ex-periment 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.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.

关 键 词：性能模拟 电池 Ni 计算结果 收费设施 充电过程 热传导方程 曲线拟合 

分 类 号：O625.632[理学—有机化学] TM911[理学—化学]