基于Buck-boost变换器的宽范围蓄电池放电维护应用

随着电动汽车迅猛发展,蓄电池作为电动汽车唯一动力源,快速、安全的给蓄电池定期进行满充、满放电维护,显得十分必要。作为蓄电池维护设备,需要放电电压、放电电流范围宽,满足单体电池或整组电池测试维护要求。本文采用电流型Buck-boost变换器结构,设计了蓄电池放电维护设备,能够在10V-300V电压范围、电流120A进行持续放电,其包括Buckboost电路和放电负载两部分组成;分析了各个部件的工作原理,并给出了具体技术指标。该设备具有放电范围宽、电流大、电流纹波小、谐波小等特点。

Application of Discharge Maintenance of Wide-range Storage Battery Based on Buck-boost Converter

With the rapid development of electric vehicles, regular maintenance of fast and safe full charge and full discharge for storage battery is very essential, as it is the only Power source of electric vehicles. Its maintenance equipments need a wide range of discharge voltage and current, satisfying the maintenance requirement of single battery and the entire set of batteries test. This paper designs discharge maintenance equipments of storage battery with the structure of current Buck-boost converter composing of Buck-boost circuit and discharge load, being able to discharge continuously under the condition of 10V-300V and 120A. In addition, the operating principle of every component is analyzed and the technical specifications are presented as well. Such an equipment has features of wide discharge range, high current, small current ripple and small harmonic.