A Novel Battery Equalization Method Base on Fuzzy Logic Control Considering Thermal Effect

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Xia, Bizhong^1 ; Zhou, Jie^1 ; Yang, Yadi^1 ; Wang, Huawen^2 ; Wang, Wei^2 ; Lai, Yongzhi^2

Graduate School at Shenzhen, Tsinghua University, Shenzhen

518055, China^1

Sunwoda Electronic Co. Ltd., Shenzhen

518108, China^2

关键词: Balancing currents;    Battery equalization;    Equalization strategy;    Finish temperature;    Fuzzy logic control;    Hardware platform;    Performance control;    State of charge;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/4/042065/pdf
DOI  :  10.1088/1755-1315/300/4/042065

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to avoid battery over-charges and over-discharges and improve the battery pack capacity, a passive equalization controller based on fuzzy logic control (FLC) is proposed to reduce the impact on inconsistency in manufacture and use processes of battery pack. A cell's state of charge (SOC) difference and its temperature is chosen as the FLC's input and the balance current is chosen as the FLC's output. The advantage of this FLC is can reach a larger balancing current and control the batteries temperature at the same time compare with average SOC controller and switch controller. Simulation results show that the equalization strategy based on FLC can achieve battery pack balance in a shorter time in a lower finish temperature. This equalization strategy can provide battery management system (BMS) designer a higher performance control strategy on the basis of the existing hardware platform.