Charging control circuit, charging device, charging system and charging control method

A charging system comprising:

• a plurality of rechargeable batteries;
• and
• a charging control circuit configured to charge the plurality of rechargeable batteries, the charging control circuit comprising:
• a charging unit;
• a plurality of power output terminals connected with the plurality of rechargeable batteries, respectively;
• a plurality of switch units each connected between the charging unit and one of the plurality of power output terminals;
• and
• a control unit electrically connected with the switch units and configured to:
• switch to a first charging mode or a second charging mode, and
• output, to the switch units, a switch signal corresponding to the first charging mode or the second charging mode, to cause the switch units to switch on or off electrical connections between the charging unit and the plurality of power output terminals.

A charging control method comprising:

• switching to a first charging mode or a second charging mode;
• outputting a switch signal corresponding to the first charging mode or the second charging mode;
• and
• switching on or off electrical connections between a charging unit and a plurality of power output terminals in accordance with the switch signal,
• wherein:
• the plurality of power output terminals are configured to connect with a plurality of rechargeable batteries, respectively, and
• the charging unit is configured to charge the plurality of rechargeable batteries through the plurality of power output terminals.