Charging control method and charging control apparatus

A charging control apparatus, comprising a transmission unit and an adjustment unit, wherein

• the transmission unit is configured to send first control information to a charging apparatus, wherein the first control information is used to indicate the charging apparatus to perform constant current charging on a to-be-charged secondary battery by using a first charging current;
• the adjustment unit is configured to:sequentially perform an adjustment step for each of a plurality of charging currents, and
• wherein each adjustment step comprises:
• obtaining, by using the transmission unit, a voltage value of a battery voltage of the secondary battery detected by the charging apparatus;
• and
• after the voltage value of the battery voltage of the secondary battery reaches a first voltage threshold corresponding to a kth charging current, controlling the transmission unit to send second control information to the charging apparatus,
• wherein the second control information is used to indicate the charging apparatus to continue to perform constant current charging on the secondary battery by using a (k+1)th charging current;
• a current value of the (k+1)th charging current is less than a current value of the kth charging current, the first voltage threshold corresponding to the kth charging current is greater than a limited charge voltage, and a difference obtained by subtracting a voltage value of the limited charge voltage from the first voltage threshold corresponding to the kth charging current is not greater than a safe voltage difference corresponding to the kth charging current;
• k is each positive integer from 1 to m, and a current value of an (m+1)th charging current meets a charging cut-off condition;
• and
• wherein the transmission unit is further configured to send termination information to the charging apparatus, wherein the termination information is used to indicate the charging apparatus to end charging.

A charging control apparatus, comprising an interface circuit and an adjustment circuit, wherein:

• the interface circuit is configured to send first control information to a charging apparatus, wherein the first control information is used to indicate the charging apparatus to perform constant current charging on a to-be-charged secondary battery by using a first charging current;
• the adjustment circuit is configured to sequentially perform an adjustment step for each of a plurality of charging currents, wherein the adjustment step comprises:
• obtaining, by using the interface circuit, a voltage value of a battery voltage of the secondary battery detected by the charging apparatus;
• and
• after the voltage value of the battery voltage of the secondary battery reaches a first voltage threshold corresponding to a kth charging current, controlling the interface circuit to send second control information to the charging apparatus, wherein the second control information is used to indicate the charging apparatus to continue to perform constant current charging on the secondary battery by using a (k+1)th charging current;
• a current value of the (k+1)th charging current is less than a current value of the kth charging current, the first voltage threshold corresponding to the kth charging current is greater than a limited charge voltage, and a difference obtained by subtracting a voltage value of the limited charge voltage from the first voltage threshold corresponding to the kth charging current is not greater than a safe voltage difference corresponding to the kth charging current;
• k is each positive integer from 1 to m, and a current value of an (m+1)th charging current meets a charging cut-off condition;
• and
• the interface circuit is further configured to send termination information to the charging apparatus, wherein the termination information is used to indicate the charging apparatus to end charging.