Device and method for detecting contact state of high-voltage electric connector of electric vehicle

Abstract

The invention discloses a device for detecting a contact state of a high-voltage electric connector of an electric vehicle. The device consists of high-voltage electric connector metal binding posts, metal conductors, a voltage measuring device, an alarm device and a whole vehicle control system, wherein materials of the metal conductors are different from those of the high-voltage electric connector metal binding posts; and the high-voltage electric connector metal binding posts are connected with the metal conductors to form a thermocouple loop. The invention has the advantages that: a method for detecting the contact state of the high-voltage electric connector of an automobile is simple, reliable, efficient and accurate; according to a principle of a thermocouple, only one metal wire is arranged on the original high-voltage electric connector, and the cost is well controlled on the basis of guaranteeing the detection accuracy; and due to the adoption of a circuit for detecting the contact state of the high-voltage electric connector, a high-voltage electric contact state can be monitored in real time, high-voltage electricity can be controlled to be turned on / off according to different contact states, a driver is prompted or alarmed, and danger can be effectively prevented.

Description

technical field [0001] The invention belongs to the field of automobile electrics, and in particular relates to a contact state detection device and a detection method for a high-voltage electric joint of an electric vehicle / hybrid electric vehicle. Background technique [0002] The DC voltage of the power battery of modern electric vehicles / hybrid vehicles reaches more than 300V, and when the vehicle is running or charging the battery, the high-voltage current can reach more than ten amps or even tens of amps. The contact condition of the high-voltage electrical connector will directly affect the utilization efficiency of the battery’s electric energy. If the high-voltage electrical connector is in poor contact, the temperature will rise extremely when a large current passes through, which will cause combustion or explosion to the vehicle. danger. Therefore, the contact state of high-voltage electrical connectors is of great significance for the long-term safe and stable o...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the deficiencies in technology, and proposes a contact state detection device and detection method for high-voltage electric connectors of electric vehicles / hybrid electric vehicles. The method is simple and convenient, and can accurately and effectively detect the contact state of high-voltage electric connectors , can alert the driver or maintenance personnel in the case of poor contact of high-voltage electrical connectors

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