Charging/discharging circuit, charging/discharging control method, control apparatus, and electronic device

A charging/discharging control method, performed by a charging/discharging circuit, wherein the charging/discharging circuit comprises an input port, a buck circuit, a first switch, a second switch, a third switch, a fourth switch, a first battery group, a second battery group, a third battery group, and an output port;

• a first end of the buck circuit and a positive electrode of the first battery group are both coupled to the input port;
• a first end of the first switch, a first end of the second switch, and the output port are all coupled to an output of the buck circuit;
• a second end of the first switch is coupled to the positive electrode of the first battery group;
• a first end of the third switch, a positive electrode of the second battery group, and a positive electrode of the third battery group are all coupled to a second end of the second switch;
• a second end of the third switch and a first end of the fourth switch are both coupled to a negative electrode of the first battery group;
• a negative electrode of the second battery group, a negative electrode of the third battery group, and a second end of the fourth switch are all grounded;
• and wherein the method comprises:
• turning on the third switch, and turning off the first switch, the second switch, and the fourth switch, to charge the first battery group, the second battery group, and the third battery group;
• and
• subsequently turning on the second switch to perform supplementary charging on the second battery group and the third battery group.

An electronic device, comprising:

• a charging/discharging circuit and a load coupled to the output port of the charging/discharging circuit, the charging/discharging circuit comprising an input port, a buck circuit, a first switch, a second switch, a third switch, a fourth switch, a first battery group, a second battery group, a third battery group, and an output port, wherein:
• a first end of the buck circuit and a positive electrode of the first battery group are both coupled to the input port;
• a first end of the first switch, a first end of the second switch, and the output port are all coupled to an output of the buck circuit;
• a second end of the first switch is coupled to the positive electrode of the first battery group;
• a first end of the third switch, a positive electrode of the second battery group, and a positive electrode of the third battery group are all coupled to a second end of the second switch;
• a second end of the third switch and a first end of the fourth switch are both coupled to a negative electrode of the first battery group;
• and
• a negative electrode of the second battery group, a negative electrode of the third battery group, and a second end of the fourth switch are all grounded.