Direct-current power supply

The invention discloses a direct current power supply, which comprises an alternating current transformer, an AC/DC rectifier module, a direct current bus, a plurality of energy storage batteries and a plurality of direct current output circuits, the energy storage batteries are distributed battery modules, and the charging ends of the distributed battery modules and the direct current output circuits are respectively connected with the direct current bus. And the output ends of the distributed battery modules are connected in parallel with the output ends of the corresponding direct current output circuits. According to the invention, the distributed battery module is adopted, the distributed battery module can be embedded and installed in each piece of power utilization equipment, and the direct current power supply main body is light in weight and small in size, so that the space is saved, and the bearing pressure of a direct current power supply installation place is not increased. 本发明公开了一种直流供电电源，包括交流变压器、