超级电容器恒流恒压充放电热特性的研究

Thermal Analysis on Supercapacitors of Constant Voltage-Constant Current Charging

为了提高超级电容器的充电性能,提出了一种卷绕式超级电容器的三维热特性有限元模型。仿真分析了常温下超级电容器在恒流恒压充放电过程中的热特性,并用热电阻进行了验证。结果表明,在常温下采用恒流恒压模式充电,温度变化慢,充电效率高,性能可靠,该模型与实验结果相符。

In order to improve the efficiency of charging the super capacitor,Proposed based on the capacity Characteristics of supercapacitors charging constant current constant voltage control method.In this paper a three-dimension finite element model of a spiral wound supercapacitor was developed,At first,the transient state and the stable state temperature fields were simulated with the finite element method.In this way,we discussed the temperature distribution of the supercapacitor.Then the internal temperature of supercapacitor were measured with the thermal resistance during charging and discharging process under normal temperature.The results indicate this model can accurately simulate the supercapacitor thermal behavior under the small or moderate constant Voltage-Constant Current charging and discharging conditions.Thus,It is high charging efficiency and reliable with temperature changing slowly using a certain range of safe current charge for supercapacitors,Some cooling strategies are necessary Beyond the current range of security.