Jumper cable, starting power supply and jump start device

A starting power supply, configured to be connected to a jumper cable having first and second input terminals, wherein, the starting power supply comprises a positive electrode and a negative electrode, the negative electrode is configured to be electrically connected with the second input terminal of the jumper cable;

• the jumper cable further comprises a first clamp configured to be clamped to a positive electrode of a vehicle battery and a second clamp configured to be clamped to a negative electrode of the vehicle battery;
• the first input terminal is electrically connected with the first clamp, and the second input terminal is electrically connected with the second clamp;
• wherein the starting power supply further comprises:
• a switching device having a controlling terminal, wherein the first input terminal and the positive electrode of the starting power supply are electrically connected through the switching device;
• and
• a controlling circuit electrically connected with the controlling terminal of the switching device, and configured to control the switching device to be switched on when the first clamp and the second clamp are properly connected to the electrodes of the vehicle battery such that a path is formed between the starting power supply and the vehicle battery;
• and configured to not control the switching device to be switched on when the first clamp and the second clamp are reversely connected to the electrodes of the vehicle battery such that no path is formed between the starting power supply and the vehicle battery;
• wherein the controlling circuit does not include a MCU,
• wherein, the controlling circuit further comprises a triggering terminal, the triggering terminal is electrically connected to a position whereby the switching device and the first input terminal are connected;
• when the triggering terminal gets electricity from a wire between the first input terminal and the switching device, the controlling circuit is triggered to control the switching device to be switched on;
• and when the triggering terminal fails to get electricity from the wire between the first input terminal and the switching device, the controlling circuit is not triggered and fails to control the switching device to be switched on.