METHOD AND DEVICE FOR CHARGING SECONDARY BATTERY, COMPUTER STORAGE MEDIUM, AND ELECTRONIC EQUIPMENT

1 . A charging method for a secondary battery, comprising:

sending, by a battery management system (BMS), first charge information to a charging source, wherein the first charge information comprises a first charge power;

performing, by the charging source, a constant-power charging on the secondary battery according to the first charge power;

sending, by the BMS, a plurality of pulse discharge information to the charging source when a battery status parameter reaches a first predetermined value, wherein each pulse discharge information comprises a discharge power and a discharge duration; and

performing, by the charging source, multiple constant-power pulse discharges on the secondary battery according to the discharge power and the discharge duration in the plurality of pulse discharge information.

2 . The charging method for the secondary battery according to claim 1 , wherein,

the battery status parameter comprises a state of charge (SOC) of the secondary battery.

3 . The charging method for the secondary battery according to claim 2 , wherein,

the first predetermined value is above 50% SOC.

4 . The charging method for the secondary battery according to claim 1 , further comprising:

sending, by the BMS, first pulse discharge information to the charging source when the battery status parameter reaches the first predetermined value, wherein the first pulse discharge information comprises a first discharge power and a first discharge duration;

performing, by the charging source, a first constant-power pulse discharge on the secondary battery according to the first pulse discharge information;

sending, by the BMS, second pulse discharge information to the charging source after the first discharge duration, wherein the second pulse discharge information comprises a second discharge power and a second discharge duration; and

performing, by the charging source, a second constant-power pulse discharge on the secondary battery according to the second pulse discharge information.

5 . The charging method for the secondary battery according to claim 4 , wherein,

the first discharge power is greater than the first charge power, and the second discharge power is smaller than the first charge power.

6 . The charging method for the secondary battery according to claim 4 , wherein,

the first discharge duration is in a range of 1 to 20 seconds, and

the second discharge duration is in a range of 1 to 20 seconds.

7 . The charging method for the secondary battery according to claim 1 , further comprising:

performing, by the charging source, the constant-power charging on the secondary battery at the first charge power again according to second charge information sent by the BMS after performing the multiple constant-power pulse discharges; and

performing, by the charging source, the multiple constant-power pulse discharges on the secondary battery again according to the plurality of pulse discharge information sent by the BMS when the battery status parameter of the secondary battery reaches a second predetermined value.

8 . The charging method for the secondary battery according to claim 7 , wherein,

the second predetermined value is an increase in the SOC by 5%.

9 . The charging method for the secondary battery according to claim 7 , further comprising:

performing repeatedly, by the charging source, the constant-power charging and the multiple constant-power pulse discharges according to the second charge information and the plurality of pulse discharge information sent by the BMS until a voltage of the secondary battery reaches a predetermined value.

10 . A charging device for a secondary battery, comprising:

a charging unit, configured to perform a constant-power charging on the secondary battery at a first charge power according to charge information sent by a battery management system (BMS); and

a pulse discharge unit, configured to perform a constant-power pulse discharge on the secondary battery according to pulse discharge information sent by the BMS,

wherein the pulse discharge unit is configured to perform multiple constant-power pulse discharges on the secondary battery according to a plurality of pulse discharge information sent by the BMS when a battery status parameter reaches a first predetermined value.

11 . The charging device for the secondary battery according to claim 10 , wherein:

the charging unit is configured to perform the constant-power charging on the secondary battery at the first charge power again after the multiple constant-power pulse discharges are performed by the pulse discharge unit; and

the pulse discharge unit is configured to perform the multiple constant-power pulse discharges again when the battery status parameter of the secondary battery reaches a second predetermined value.

12 . The charging device for the secondary battery according to claim 11 , wherein:

the multiple constant-power pulse discharges and the constant-power charging are alternately performed by the pulse discharge unit and the charging unit until a voltage of the secondary battery reaches a predetermined value.

13 . A non-transitory computer-readable storage medium, wherein a computer-executable instruction is stored in the computer-readable storage medium, and when the computer-executable instruction is executed by a processor, the charging method according to claim 1 is implemented.

14 . Electronic equipment, comprising:

a memory, on which a computer instruction is stored, and

a processor, configured to perform the charging method according to claim 1 by executing the computer instruction.