摘要
钴酸锂电池比能量高,循环寿命长,是一些便携式电子设备电源的首选。为了进一步了解钴酸锂电池的性能,以3.6V/2.2Ah钴酸锂电池为实验对象,对电池的基本性能进行了研究。首先,进行了容量实验,研究了电池在不同倍率下的放电特性;其次,利用静置法研究了电池的充放电平衡电势(Electro motive force,简称EMF),分析了电池的平衡电势曲线;最后,得到了电池在不同SOC下的充放电欧姆内阻、极化内阻和总内阻,发现当SOC<0.1时,内阻变化较大,当0.1<SOC<1.0时,内阻变化较小。
LiCoO2 battery has the character of high specific energy and long cycle life.So,LiCoO2 battery is the first choice of power supply for many electric devices.In order to further understand the performance of lithium batteries,the basic performance of the 3.6 V/2.2 Ah LiCoO2 battery was studied.Firstly,the capacity experiment was carried out to study the discharge character at different discharge rates.Secondly,the charge and discharge electro motive force(EMF)of the battery was studied by the static method and the curve of EMF was analyzed.Finally,the charge-discharge ohm resistance,polarization resistance and total internal resistance of the battery under different SOC were analyzed.It is shown that when SOC<0.1,the change of internal resistance is large.When the SOC is between 0.1 and 1.0,the change of resistance is small.
作者
冯莉原
宋凌珺
周兴振
葛帅
向立明
FENG Li-yuan;SONG Ling-jun;ZHOU Xing-zhen;GE Shuai;XIANG Li-ming(School of Transportation Science and Engineering,Beihang University,Beijing 100191,China;School of Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China;School of Mechanical Engineering and Automobile,Hubei Univetsity of Arts and Science,Xiangyang Hubei 441053,China)
出处
《电源技术》
CAS
CSCD
北大核心
2018年第3期339-342,共4页
Chinese Journal of Power Sources
基金
2014年襄阳市研究与开发计划项目
关键词
钴酸锂电池
性能
容量
平衡电势
内阻
LiCoO2 battery
performance
capacity
electro motive force
internal resistance
