摘要
动力型磷酸铁锂电池的特性与环境温度紧密相关。电池的容量特性、内阻数值和荷电状态—开路电压曲线是反映电池基本性能的重要特性指标,也是参与电池管理系统设计的重要参数。主要进行不同环境温度下电池的以上各性能试验,研究在不同的环境温度下电池的容量、内阻和开路电压的变化规律。动力型磷酸铁锂电池的容量在低温下迅速降低,在高温下迅速上升,高温下的容量变化速度小于低温;随温度上升,充电和放电过程的欧姆内阻、极化内阻均下降,温度不同时电池的欧姆内阻变化率高于极化内阻变化率,低温下欧姆内阻的变化率大于高温下的变化率;同时,低温下的荷电状态—开路电压曲线低于高温下的曲线,但总体上,曲线受温度的影响并不显著。
The characteristics of power LiFePO4 batteries are closely connected to ambient temperature.The capacity characteristic,resistance and state of charge-open circuit voltage（SOC-OCV） curve are important parameters to represent the performance of power batteries and to determine battery management system（BMS） design.The experiments in different ambient temperatures are carried out and the laws between temperature and capacity,resistance and OCV are studied.The capacity drops sharply under low temperature,and increases with a relatively slower rate than under low temperature when the temperature goes up.Ohmic and polarization resistances during charge and discharge process decrease when the temperature rises,and the change rate of ohmic resistance is higher than the polarization resistance,moreover,the change of ohmic resistance under low temperature is more significant than under high temperature.With the decrease of temperature,the SOC-OCV curve moves down,but generally,the curve is affected only slightly by the change of temperature.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2011年第18期115-120,共6页
Journal of Mechanical Engineering
基金
台达电力电子科教发展计划重点资助项目(20093000329)
关键词
磷酸铁锂电池
温度
容量
内阻
开路电压
Power LiFePO4 battery Ambient temperature Capacity Resistance Open circuit voltage（OCV）
