基于KA7500B的智能锂电池充电器设计

摘要

为了解决普通锂电池充电器可能造成过充、欠充及充电速度较慢的问题，利用单片机STC12C5A60S2，以电压型PWM控制器KA7500 B为核心，设计一种BUCK型智能锂电池充电器，该系统分阶段以恒流或恒压的充电方式对锂电池充电，具有过流、过压保护。实验结果表明，该智能充电器可快速、高效及可靠的对锂电池充电，比普通锂电池充电器充电速度提高约一小时左右。%In order to solve the problem that ordinary lithium battery charger may cause over-charge,under-charge and charging speed,using single-chip STC12C5A60S2,a BUCK type smart lithium battery charger is designed based on PWM controller KA7500 B.The system of charging mode with constant current and con-stant voltage stage for rechargeable lithium batteries has over-current and over-voltage protection.The ex-perimental results show that the smart charger can be fast,efficient and reliable for rechargeable lithium batter-ies.The design is about one hour faster than ordinary charger.