Abstract: A power supply system includes a mains system, a renewable energy conversion unit, a fossil energy conversion unit, and a control unit. Because electric energy converted from renewable energy is cheaper than electric energy converted from fossil energy, the renewable energy conversion unit is added to the power supply system. When the mains system is abnormal, the control unit preferentially enables the renewable energy conversion unit to provide electric energy. If electric energy provided by the mains system and the renewable energy conversion unit still cannot meet a power supply requirement, the control unit starts the fossil energy conversion unit to provide electric energy. In this way, electricity consumption costs of a user are reduced as much as possible, and commercial competitiveness of the power supply system is improved.

Abstract: A power supply management system includes a monitoring module and a plurality of battery modules. The battery module includes a BMS, a DC/DC converter, and a plurality of battery packs. When the battery packs of the plurality of battery modules are charged or discharged by using the DC/DC converter, the monitoring module may detect charge/discharge rates of the battery modules, and when the charge/discharge rates of the battery modules are less than a specified threshold, control a part of battery modules that are being charged or discharged to stop being charged or discharged. After a quantity of battery modules that are being charged or discharged is decreased, the charge/discharge rates are increased.