摘要
针对大容量充电电池(容量大于2000m Ah)的充电器的电流变化率和能量转换效率低,设计一款输出电压为18V^24V,最大输出电流为2A的DC-DC充电器。充电器电路采用BUCK(降压型)开关电源的基本结构,主要包括大功率开关管、LC储能滤波电路以及光耦隔离电路。同时利用单片机、键盘、显示器以及电流传感器等电路实现了输出电流的检测、显示以及步进可调的功能。测试结果表明,室温下输入电压为24V^36V时,输出电流在1A^2A范围内以0.1A步进可调,电流变化率不大于2%,电能转换效率可达90%。
A DC-DC charger of the high-capacity rechargeable battery which has the capacity of more than 2000 m Ah is designed with maximal output current of 2A and 18 V ~ 24 V output voltage,because current rate of change and transfer efficiency of charger are lower.The charger circuit adopts the BUCK structure.And then high power switch tube,LC energy-storage filtering circuit and optical coupling isolation circuit are selected.So the functions of output current detection,displaying and stepping adjustment are achieved by using the single chip microcomputer,keyboard,monitor,and current sensor circuit.The test results show that when the input voltage of 24 ~ 36 V at room temperature,the output current is 1A ~ 2A with stepping adjustment of 0.1A.The current rate of change was less than 2% and transfer Efficiency can reach 90%.
出处
《自动化与仪器仪表》
2016年第3期46-47,共2页
Automation & Instrumentation
基金
甘肃省高等学校科研项目(2015A-163)
关键词
充电电池
开关电源
开关管
电流变化率
转换效率
Rechargeable Battery
Switching Power Supply
Switch Tube
Current Rate of Change
Transfer Efficiency
