HIGH VOLTAGE INTERLOCK CIRCUIT AND DETECTION METHOD

The present disclosure provides a high voltage interlock circuit and a detection method thereof. The circuit comprises: a power module (V), wherein a positive electrode of the power module (V) is connected to one end of a current generating module (C); the current generating module (C), wherein the other end of the current generating module (C) is connected to a first terminal of a high voltage component module (H) to inject a constant DC current into the high voltage component module (H); a first voltage dividing module (Fl), wherein one end of the first voltage dividing module (Fl) is connected to a second terminal of the high voltage component module (H), and the other end of the first voltage dividing module (Fl) is respectively connected to a negative electrode of the power module (V) and a power ground; and a processing module (P) configured to determine a fault of the high voltage component module (H) based on a first voltage collected from the second terminal of the high voltage component module (H). Embodiments of the present disclosure can improve accuracy of determination of fault for the high voltage interlock circuit.