Abstract: Considering the poor safety and controllability of a lithium iron phosphate battery in marine exploration robots, a charge/discharge management system based on an STM32 single-chip microcomputer is proposed. The hardware and related circuits of the main control module, single-battery voltage monitoring module, and equalization module are designed. The control mode adopts a master-slave topology. Through hardware tuning and optimization, the work area of the circuit board is considerably reduced, and the cooling performance of the system is improved. Test results show that the voltage, current, and temperature data are correctly displayed; the maximum detection deviation of single-battery voltage is 0.96%; and the maximum single-battery voltage exceeds the average voltage of a battery pack by 6 mV. Thus, the balancing effect is good.

Key words: single-chip microcomputer;storage battery;topology, module design