Fast charging systems design for lead-acid battery

A 5 kW fast charging system with negative pulse for lead-acid battery is designed, the acceptance rate of the charging process with negative pulses is analyzed, the hardware block diagram and the main circuit topology are given out, the parameters of the components in our circuit are discussed. Using the charging system to make charging experiment for 12V70Ah lead-acid battery, the curves of the effectiveness of the main circuit, the curves of the charging current with negative pulse and the curves of the battery capacity are obtained. These results show that the charging time is significantly reduced with the system compared to conventional system. The full load effectiveness of the system reaches 92.7% at high frequency, and reaches the maximum efficiency point at 1.6 kW. The system achieves the goal of design.