电动汽车动力锂电池内阻在线测量系统设计  

Design of Online Measurement System for Internal Resistance of Electric Vehicle Power Lithium Battery

作　　者：刘佳锐 何少佳[1] 莫镇源 梁育林 LIU Jiarui;HE Shaojia;MO Zhenyuan;LIANG Yulin(School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学机电工程学院,广西桂林541004

出　　处：《仪表技术》2022年第2期19-22,54,共5页Instrumentation Technology

基　　金：广西科技重大专项(桂科AA18242046-2);大学生创新创业项目(202010595193)。

摘　　要：采用交流恒流注入、相位电压转换和小信号精密测量技术,设计一套锂电池内阻在线智能测量装置。对锂电池进行多次内阻测试和分析对比,结果表明,该装置与传统交流内阻测试仪相比,具有快速、准确、稳定性好、标准差小等特点,适合于电动汽车动力电池的管理优化,以提高车辆的动力性能和安全性能以及增加续航里程。A set of online intelligent measuring device for internal resistance of lithium battery is designed by adopting AC constant current injection, phase-voltage conversion and small-signal precise measurement technology. The internal resistance test and comparative analysis of the lithium battery has been carried out many times. The experimental results show that compared with the traditional AC inner resistance tester, the device has the characteristics of fast, accurate, well stability and small standard deviation for measuring the internal resistance of lithium batteries. It is suitable for the management and optimization of electric vehicle power batteries, so as to improve vehicle power performance and security, and to increase endurance mileage.

关 键 词：锂电池 电池内阻 在线监测 交流恒流源 模拟运算 

分 类 号：TM932[电气工程—电力电子与电力传动]