Control circuit, control system, and transportation device

A control circuit, configured to control connection or disconnection of a target loop after being connected to the target loop, comprising:

• a current detection unit, wherein the current detection unit is configured to:
• when being connected to a battery, output a first type signal when detecting that the battery has an overcurrent or a short circuit;
• and
• a driver circuit, wherein an input terminal of the driver circuit is connected to a signal output terminal of the current detection unit, an output terminal of the driver circuit is configured to connect to a safety module in the target loop, and the driver circuit is configured to output, in response to receiving the first type signal transmitted from the current detection unit, a drive signal to drive the safety module to be disconnected,
• wherein the target loop is a loop in the battery or a loop in a device in which the battery is located.