混合储能的太阳能LED路灯电源系统设计

New method of hybrid energy storage used in solar LED streetlights

针对普通铅酸蓄电池太阳能LED路灯储能系统使用寿命短的问题,提出了一种解决储能系统使用寿命短的新方法:利用磷酸铁锂电池进行储能、超级电容滞环电压比较法对蓄电池充放电过程进行控制.对磷酸铁锂电池太阳能LED路灯控制部分进行了仿真,结果表明:该方法能够在弱光及光强不稳定情况下将扰动信号能量储存在超级电容中,对蓄电池进行充电,有效提高了路灯系统的能量利用率及使用寿命.

A new method was proposed to solve the issue that service life of energy storage sys tem in ordinary leadacid battery solar LED streetlights was short. In this method, the battery charging and discharging process was controlled using super capacitors hysteresis voltage compar ison method and taking lithium iron phosphate batteries as energy storage system innovatively. The simulation results of control part in lithium iron phosphate battery solar LED streetlights re vealed that the method could store disturbance signal energy into the super capacitor when the light intensity was low and unstable and then charged the battery, finally improve the energy effi ciency and service life of solar LED streetlights.