Charging device, charging control method, energy management systemt and storage medium

A charging control method, the method being applied performed by an energy management system (EMS), the EMS being connected to a charging device, the charging device being connectable to a battery and an energy absorption circuit, wherein the charging device comprises a charging circuit, the charging circuit comprises a voltage stability control circuit, an output port, and an input port, the charging circuit is configured to receive a high-voltage alternating current through the input port and is connected to a battery through the output port, the voltage stability control circuit is configured to convert the high-voltage alternating current into a low-voltage direct current, and the method comprises comprising:

• connecting the charging device to the battery;
• controlling the charging device to charge the battery unidirectionally with a positive pulse current of the low-voltage direct current when the battery does not support a negative pulse charging strategy;
• controlling the charging device to charge the battery with the positive pulse current during a first period when the battery supports the negative pulse charging strategy;
• and
• controlling the charging device to charge the battery with a negative pulse current of the low-voltage direct current during a second period, and controlling the energy absorption circuit to absorb the negative pulse current.