混合型超级电容电热耦合特性研究  

Research on electrothermal coupling characteristics of hybrid super capacitor

作　　者：刘万琦 董聪 乔志军 卜钟鸣 叶阳辉 LIU Wanqi;DONG Cong;QIAO Zhijun;BU Zhongming;YE Yanghui(School of Mechanical and Energy Engineering,Zhejiang University of Science and Technology,Hangzhou Zhejiang 310023,China;CRRC Supercapacitor Energy Storage and Conservation Technology R&D Center,Ningbo CRRC New Energy Technology Co.,Ltd.,Ningbo Zhejiang 315112,China)

机构地区：[1]浙江科技学院机械与能源工程学院,浙江杭州310023 [2]宁波中车新能源科技有限公司中国中车超级电容储能及节能技术研发中心,浙江宁波315112

出　　处：《电源技术》2022年第7期769-773,共5页Chinese Journal of Power Sources

基　　金：宁波市科技计划项目《科技创新2025重大专项》(2019B10045);浙江省自然科学基金项目(LQ21E060003);国家自然科学基金项目(51606169);浙江科技学院省属高校基本科研业务费专项资金项目(2021QN031)。

摘　　要：采用数值模拟的方法建立一维电化学模型与三维传热模型,研究了超级电容的电热耦合特性,探究了不同充放电过程和环境温度对超级电容产热、温度分布和散热性能的影响,同时分析活性炭电极厚度对混合型超级电容性能的影响。研究结果表明:混合型超级电容正负极质量比将影响其运行性能;负极质量的增加能提升正极锂离子的利用率,同时增加能量密度,但会造成等效串联内阻增加,功率密度下降。负极质量的增加会影响超级电容的散热能力,在大电流充放电条件下这种影响尤为突出。在研究范围内,将正负极质量比控制在1∶1.5至1∶2区间内能使超级电容器获得最佳性能。The one-dimensional electrochemical model and a three-dimensional heat transfer model were used to establish by numerical simulation to analyse the electrothermal coupling characteristics of supercapacitors.The effects of different charging and discharging processes and ambient temperature on the heat generation,temperature distribution and heat dissipation performance of supercapacitors were analyzed.At the same time,the performance influence of the thickness of activated carbon electrode of hybrid supercapacitor was also studied.The research results show that the mass ratio of positive and negative electrodes will affect the performance of hybrid supercapacitors.The increase of mass for negative electrode can improve the utilization of lithium ion and increase the energy density,however,it will cause the increase of the equivalent series internal resistance and the decrease of power density.In addition,the increase of mass specific gravity of negative electrode will affect heat dissipation capacity of super capacitor,the effect is particularly prominent under the condition of high current charge and discharge.In the research scope of this paper,the best performance can be obtained by controlling the mass ratio of positive and negative electrodes between 1∶1.5 and 1∶2.

关 键 词：超级电容 温度特性 电流 正负极质量比 能量密度 

分 类 号：TM53[电气工程—电器]