一种基于电动自行车电池包的均衡策略

A balance strategy based on battery pack of electric bicycle

针对电池不均衡及现有电池均衡系统过于复杂等问题,提出了一种新型的均衡策略。该均衡策略将主动和被动均衡技术相结合,但又不同于现有的结合方式。该均衡策略在电池充电情况下用被动均衡方式给电池单体均衡,在电池静置或放电情况下用主动均衡方式给电池组均衡,不仅均衡电路更简单,节约成本,而且均衡效果显著。实验基于电动自行车的电池包,将电池包分为两组,一组大电流放电模拟电池组不均衡,另一组正常使用。根据上述策略进行实验,实验结果表明了该均衡策略的可行性,且主被动均衡后的电池电压基本恢复,可正常使用。

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.