恒流与恒负载放电测量超级电容器的静电容量  

Measuring capacitance of supercapacitor by constant current and constant load discharge methods

作　　者：冯建[1] 孙健[1] 李智玮[1] 许峰[1] FENG Jian;SUN Jian;LI Zhi-wei;XU Feng(Shanghai Institute of Measurement and Testing Technology,Shanghai 201203,China)

机构地区：[1]上海市计量测试技术研究院

出　　处：《电池》2019年第2期143-145,共3页Battery Bimonthly

摘　　要：结合典型的直流充放电曲线,对恒流放电法和恒负载放电法测量超级电容器静电容量的原理进行介绍,设计测量电路,并比较两种方法的测量结果。在恒流放电法中,静电容量随放电电流的增大而减小;在恒负载放电法中,静电容量随放电电阻的增大而增大,两种方法的测量结果具有一致性。恒流放电法简单可靠,但对放电电流的稳定性要求高,且只能在单一电流下进行测量;恒负载放电法测量速度快,且测量结果与放电电流大小无关。The constant current discharge method and the constant load discharge method were used to measure the capacitance of supercapacitors.The principle and measurement circuit of the methods were introduced based on the typical voltage-time characteristics between capacitor terminals.Measurement results of the two methods were consistent.The calculated capacitance decreased when the discharge current was increased by constant current discharge method,while the capacitance increased when the discharge load increased by constant load discharge method.The advantages and disadvantages of the two methods were analyzed.The constant current discharge method was simple and reliable but it had high requirements for the stability of discharging current.Furthermore,it measured the capacitance with only one single current.The constant load discharge method could implement fast measurement and the result was independent of the discharge current.

关 键 词：超级电容器 静电容量 恒流放电法 恒负载放电法 

分 类 号：TM533[电气工程—电器]