Effects of Current and Ambient Temperature on Thermal Response of Lithium Ion Battery
Shuping Wang,
Tangqin Wu,
Heng Xie,
Changhao Li,
Jiaqing Zhang,
Lihua Jiang,
Qingsong Wang
Affiliations
Shuping Wang
State Grid Anhui Electric Power Research Institute, Anhui Province Key Laboratory of Electric Fire and Safety Protection (State Grid Laboratory of Fire Protection for Transmission and Distribution Facilities), Hefei 230601, China
Tangqin Wu
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
Heng Xie
State Grid Anhui Electric Power Co., Ltd., Hefei 230061, China
Changhao Li
State Grid Anhui Electric Power Research Institute, Anhui Province Key Laboratory of Electric Fire and Safety Protection (State Grid Laboratory of Fire Protection for Transmission and Distribution Facilities), Hefei 230601, China
Jiaqing Zhang
State Grid Anhui Electric Power Research Institute, Anhui Province Key Laboratory of Electric Fire and Safety Protection (State Grid Laboratory of Fire Protection for Transmission and Distribution Facilities), Hefei 230601, China
Lihua Jiang
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
Qingsong Wang
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
Both operating current and ambient temperature have a great impact on heat generation and the available residual capacity of the lithium ion battery. The thermal response of the lithium ion battery is investigated under isothermal conditions. Six currents from 1 A to 6 A, with a 1 A interval, are investigated in order to discuss the effect of current under 25 °C; four temperatures from 10 °C to 55 °C, with a 15 °C interval, are investigated to study the effect of temperature under the current of 2 A. The heat generation rate increases with the current increasing during both the charge and discharge stage, but the charge capacity remains independent of current, while the discharge capacity decreases with increasing current. Heat generation decreases with increasing temperature in both the charge and discharge stage, while charge capacity and discharge capacity increase. with the temperature increasing from 10 °C to 55 °C. Heat generation of per charge/discharge capacity is also discussed, and in most cases, the heat generation of per charge capacity during the constant voltage charge stage is larger than that during the constant current charge stage. Heat generation increases at the expense of available capacity, during the discharge stage.
