新型电动汽车锂电池组混合均衡电路的设计

摘要

针对锂电池充放电过程中的不一致性，设计了一种基于能量转移的锂电池均衡方案，通过将多余的能量传递到低电量的电池中实现均衡。系统采用的是2级混合均衡方法，第一级采用的是新型电感均衡电路，通过储能电感将能量传递给低电压电池；第二级采用的是独立变压器并联均衡电路，电池组产生的电流通过变压器原边，在副边产生电流从而将能量传递给低电压电池。实验结果表明，该方法具有均衡时间短、效率高等优点，有效解决锂电池充放电不均衡性问题。%According to the inconsistency probIem in charging and discharging process of series connected Iithium-ion battery pack,a Iithium battery equaIization scheme based on energy transferring is designed.By moving the excess energy to the Iow power battery,the goaI of equaIization is achieved.The system uses a two-stage hybrid equaIization method.The first stage is the new pattern inductance equaIization circuit,and the second is independent transformer paraI eI equaIization circuit.