摘要
温度对锂电池的容量和充放电特性等关键指标有着重要的影响,对其进行研究可以为锂电池的实际使用和维护以及SOC估算提供依据。以航空钴酸锂电池为对象,通过实验研究其容量、充放电曲线在不同环境温度下的变化规律。结果表明:在环境温度高于20℃时电池容量变化不明显,但在环境温度低于0℃时,电池容量将快速下降。在低温环境下充电时,电池容量在平台区时变化很大,且上升速度明显大于在高温环境下。在低温环境下,特别在低于-20℃时,电池在放电过程中电压下降速度激增。放电初期,电池电压下降较快,进入平台区放电速度减慢,但一旦电池电压低于3.7V,电压急速下降。
The key indicators of the capacity and charging and discharging characteristics of lithium-ion batteries weregreatly effected by temperature. The study of it could provide basis for actual use, maintenance and estimation.Based on the aviation cobalt acid lithium batteries for research object, the change rule of aviation cobalt acid lithiumbattery capacity, charge and discharge curves through the experiment under different environmental temperature wasstudied. The results show that capacity change of battery in the environmental temperature above 20 ℃ was notobvious, but in the ambient temperature below -10 ℃, the battery capacity would decline rapidly. When the batterywas charged ina low-temperature environment, the capacity of battery varied greatly in the platform region, and therise speed was significantly higher than it in the high-temperature environment. In low temperature environment,especially less than -20 ℃, the battery voltage dropped speed surge in the process of discharge. Early discharge,the battery voltage dropped quickly, during the platform area discharge at a slower pace, but once the battery voltagewas lower than 3.7 V, the voltage would drop rapidly.
出处
《电源技术》
CAS
CSCD
北大核心
2017年第9期1278-1280,1295,共4页
Chinese Journal of Power Sources
基金
四川省科技厅重点研发项目(2017FZ0013)
四川省教育厅科研项目(17ZB0453)
绵阳市科技局科技攻关项目(15G-03-3)
关键词
钴酸锂电池
温度
容量
充放电特性
cobalt acid lithium batteries
temperature
capacity
charge and discharge characteristics
