Hardware circuit design of intelligent fast charger control system

This design is an intelligent fast charger system based on the STC89C52 MCU. The system uses the battery management chip MAX1811, which can control the intelligent charging of lithium batteries. Users can adjust the power mode through pre-set buttons, including fast and slow charging modes. The charging system will detect battery parameters and then charge the battery. During the charging process, the system uses the MAX157 chip to detect battery parameters and check for any abnormalities. A portion of the battery data detected by the chip will be sent to the LCD screen LCD1602 through the MCU. Users can understand the battery situation in real time. After charging is completed, the system will remind users promptly through LED alarm lights and buzzers, and turn on power-off protection to ensure battery safety. The system uses a USB connector for power supply. Charging the lithium battery through the output interface will reset the system every time the power is turned on, requiring the user to reset the battery charging system.