摘要
针对锂离子电池组后备电源的均衡充电特性,选取易于采集的电池工作电压作为电池组均衡控制参数,据此设计制作了锂离子电池组均衡控制电路。设定3.4、3.5、3.6 V的3个不同均衡阈值电压分别对4只3.2 V 20 Ah磷酸铁锂电池组成的电池组进行0.1 C、0.25 C和0.5 C倍率的充电均衡测试,并记录每组电池的充电电流、电压和内阻。通过分析对比发现,同倍率的充电均衡阈值电压越大,均衡能耗越低,均衡速度越快。因此,重要场合的锂离子电池组后备电源系统宜采用大电流大阈值均衡控制方法,迅速有效地将电池组充满电,确保后备电源给设备提供稳定的电能。
For lithium-ion battery backup power equalization charging particularity,easilycollectingbattery voltage was selected as the control parameterof lithium-ion battery,alithium-ion battery packequalization control circuitwas designed.According to three thresholds of voltage 3.4,3.5 and 3.6 V,the equalization experiments to lithium-ion battery groupat 0.1 C,0.25 C and 0.5 C rate were done,charging current,voltage andinternal resistancewere recorded.Through analysis and comparison,when the charging rate is thesame,the higher the threshold voltage is,the lower the energy consumption ofequalization,and also the faster the equalization speed.The importantlithium-ion battery backup power system should be adopted the equalization control method of largecharging current and large threshold value to quickly and effectively chargethe backup battery,to ensure that the backup power supply for equipment canprovide stable electricity.
作者
汤秀芬
米晨
TANG Xiufen;MI Chen(School of Physics and Electronic-Electrical Engineering,Ningxia University,Yinchuan 750021,China;Department of Asset and Laboratory Management,Ningxia University,Yinchuan 750021,China)
出处
《实验室研究与探索》
CAS
北大核心
2020年第7期41-44,共4页
Research and Exploration In Laboratory
基金
宁夏自然科学基金资助项目(NZ17047)。
关键词
锂离子电池
后备电源
均衡控制
lithium-ion battery
backup power
equalization control
作者简介
汤秀芬(1967-),女,辽宁营口人,教授,现主要从事新型电源技术研究。Tel.:13995079970,E-mail:cjftxe@nxu.edu.cn。
