一种新型的锂离子电池开关充电电路  

A Novel Li-Ion Battery Switching Charger

作　　者：王新宇[1] 崔嘉杰[1] 廖鹏飞[1] 罗明[1] 罗萍[1] 甄少伟[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,成都610054

出　　处：《微电子学》2014年第5期666-669,674,共5页Microelectronics

摘　　要：设计了一种新型的基于恒流/恒压充电模式的锂离子电池开关充电电路。在电池电压达到浮充电压时,实现了恒流充电向恒压充电的平滑切换。通过对恒流充电环路和恒压充电环路的设计,尤其是对充电电流采样信号放大电路和电池电压采样信号放大电路的详细设计,实现了电路的稳定工作。采用0.5μm标准CMOS工艺对电路进行仿真,结果表明,电路工作在5V的电源电压下,涓流充电电流为119.6mA,恒流充电电流为1.209A,恒压充电阶段的电池电压为4.195V,并且实现了恒流充电向恒压充电的平滑切换。A Li-ion battery switching charger based on constant current（CC）/constant voltage（CV） mode was designed. When the battery voltage reached floating charge voltage, the charger shifted the mode from constant current to constant voltage smoothly. The stable operation of the circuit was realized by the design of the constant current charging loop and the constant voltage charging loop, especially by the detailed design of the charging current sampling signal amplifier and the battery voltage sampling signal amplifier. The circuit was simulated with Hspice based on 0.5 μm CMOS process. The result showed that the circuit provided trickle current of 119.6 mA and constant current of 1. 209 A at 5 V power supply, and the battery voltage was 4. 195 V in CV charging process, and the charger shifted the mode from constant current to constant voltage smoothly.

关 键 词：锂离子电池 开关充电电路 恒流 恒压 平滑切换 

分 类 号：TN432[电子电信—微电子学与固体电子学]