On-line Estimation of Power Battery SOC Based on FPGA

Abstract

Battery technology has been the bottleneck of the development of electric vehicle technology. In order to grasp the battery state in real time, it is becoming more and more important to design a battery management technology (BMS) that can monitor and adjust battery state in real time. SOC (State of charge) is an important parameter to describe the charge and discharge capacity of the battery. It is of great significance to give full play to the performance of the battery system, improve the safety of the battery, prevent the overcharge and discharge of the battery, and prolong the life of the battery. Therefore, BMS should be able to accurately estimate the SOC of battery in real time. This paper uses the method of OCV-AH to estimate the SOC of battery, and uses field-programmable gate array (FPGA) to realize this method from two aspects of hardware and software.