Design of an Efficient Battery Charging System Based on Ideal Multi-state Strategy

With increasing demand for backup electric power, the design of an efficient battery charger is essential in many industrial applications. However, traditional charging methods do not contribute an effective mechanism to achieve an optimal charging process. Therefore, this paper aims to design a current-controllable self-managing battery charging system, especially for lead-acid batteries. The proposed charger is based on an ideal multi-state strategy, and it can provide a predefined constant current for both charging and holding currents. Additionally, the battery equalization circuit is also proposed to equalize every battery voltage at the same level before charging. The +24V that is used to drive the load can be connected to either AC or battery power automatically. For easy tracking the charging situation, all real-time information is displayed on LCD instantly. The experimental results confirm that the proposed scheme is superior in flexibility, high efficiency, and self-management capability.