复合储能负载的无线电能传输特性

Wireless Power Transmission Characteristics of Composite Energy Storage Load

蓄电池具有能量密度大、充放电速度慢、循环寿命短的特点,而超级电容器具有功率密度大、充放电速度快、循环寿命长等特点,两者具有很好的性能互补性.在无线电能传输系统结构设计中采用蓄电池和超级电容器构成的复合储能负载,对双LCC谐振补偿结构的复合储能无线电能传输系统在不同充电方式下的充电电流、传输功率和传输效率进行了研究.结果表明,复合储能负载的充电模式不同,传输特性不同,对应的等效电阻、充电电流、传输功率及传输效率也不同,充电模式对应的等效电阻越大,系统传输功率和负载输出功率越高,而传输效率越小.

The battery and the super-capacitor are complementary in performance since the former has the characteristics of high energy density,slow charge and discharge speed and short cycle life,while the latter has the characteristics of high power density,fast charge and discharge speed and long cycle life.In this paper,a composite energy storage load composed of the battery and the super-capacitor is adopted in the structural design of the wireless power transmission system,and the charging current,transmission power and transmission efficiency of the wireless power transmission system of the composite energy storage with dual LCC resonance compensation structure are studied under different charging modes.The results show that different charging modes of the composite energy storage load have different transmission characteristics,equivalent resistance,charging current,transmission power and transmission efficiency.The higher the equivalent resistance of the charging mode is,the higher the system’s transmission power and the load output power are,and the lower the transmission efficiency is.