A balance strategy based on battery pack of electric bicycle

Abstract

A new balancing strategy was proposed to solve the problems of unbalanced batteries and the complexity of the existing battery balancing system. This balancing strategy combines active and passive balancing techniques, but it is different from the existing methods. This equalization strategy uses passive equalization to equalize the battery unit under battery charging and active equalization to equalize the battery pack under static or discharging conditions. It not only simplifies the equalization circuit, saves cost, but also has significant equalization effect. Based on the battery pack of electric bicycle, the experiment divides the battery pack into two groups. One group simulates the unbalanced battery pack with high current discharge, and the other group is in normal use.The experimental results show that the equalization system is feasible, and the battery voltage after active and passive equalization is basically restored and can be used normally.

Keywords

• cell passive equalization
• battery pack active equalization
• battery pack for electric bicycle