High-voltage interlock system and detection method thereof

A high-voltage interlock system comprising a target control device and at least one non-target control device connected in sequence, wherein:

• the non-target control device comprises a first detection unit and a first high-voltage component;
• the first detection unit comprises a first controller, a first current detector, and a first detection resistor set;
• the first high-voltage component is connected to the first detection unit;
• the target control device comprises a second detection unit, a current generation controller, a current generator, and a second high-voltage component;
• the second detection unit comprises a second controller, a second current detector, and a second detection resistor set;
• the second controller is connected to the current generation controller, and configured to generate a pulse drive signal for driving the current generation controller;
• the current generation controller is connected to the current generator, and configured to generate an alternating voltage signal according to the pulse drive signal;
• the current generator is connected to the second detection resistor set, and configured to output an alternating current signal according to the alternating voltage signal;
• the second high-voltage component is connected to the current generator and the second detection resistor set;
• the current generator, the second high-voltage component, the second detection resistor set together with the first detection resistor set and the first high-voltage component form the high-voltage interlock circuit in which the alternating current signal is transmitted;
• the second current detector is connected to the second detection resistor set, and configured to acquire a second voltage signal across the second detection resistor set and output a second detection result signal according to the second voltage signal;
• the second controller is connected to the second current detector, and configured to receive the second detection result signal output by the second current detector and perform a main judgement based on the second detection result signal to determine a fault of the high-voltage interlock circuit;
• the first current detector is connected to the first detection resistor set, and configured to acquire a first voltage signal across the first detection resistor set and output a first detection result signal according to the first voltage signal;
• and
• the first controller is connected to the first current detector, and configured to receive the first detection result signal output by the first current detector and perform an auxiliary judgement based on the first detection result signal to determine the fault of the high-voltage interlock circuit.