Direct current power supply system contactor adhesion detection apparatus, method and electric vehicle thereof

Aiming at a problem existed in the current method for solving contactor contact adhesion, the invention provides a direct current power supply system contactor adhesion detection apparatus and a detection method with higher precision and a stronger applicability and an electric vehicle which uses the apparatus and/or the method. Through using a precharging module and a capacitor pack in a power-driven controller in a system applied by the contactor, charging and discharging and voltage detection is performed to the capacitor pack which is connected with the direct current power supply through the contactor. A detection result is compared so as to realize the contactor adhesion detection. Equipment damage and even personnel injury caused by the contactor adhesion can be avoided. Reliability of the contactor application system can be increased.