Jumper cable device and jump start system

A jumper cable device, comprising an input and two clamps, wherein the input is configured to be connected with a startup power source, and the two clamps are configured to be connected to a battery of a load;

• wherein the jumper cable device further comprises a main controller, a clamp polarity detection module, a forced mode feedback module and a clamp connection module;
• wherein the main controller is connected to the clamp polarity detection module and the clamp connection module, the clamp polarity detection module and the clamp connection module are further connected to the two clamps, and the forced mode feedback module is connected to the main controller and the two clamps;
• and
• when the two clamps are connected to the battery, the clamp polarity detection module is configured to detect polarities of electrodes of the battery to which the two clamps are respectively connected, and the main controller is configured to acquire a detection result signal of the clamp polarity detection module, control the clamp connection module according to the detection result signal to determine polarities of the two clamps according to the polarities of the electrodes of the battery and connect circuits between the input and the two clamps to switch on a circuit to the battery;
• wherein when a voltage of the battery of the load is lower than a detection threshold, the forced mode feedback module is operated to forcibly connect the circuits between the input and the two clamps, thereby switching on the circuit to the battery.