Device and method for detection and treatment of high voltage relay adhesion in electric vehicles

Abstract

The present invention relates to a device and method for detecting and processing the adhesion of high-voltage relays of electric vehicles. The device includes a relay module and a detection module; the relay module includes a main positive relay connected in series with the positive terminal of the battery and the positive terminal of the load, a main negative relay connected in series with the negative terminal of the battery and the negative terminal of the load, and a positive terminal connected in series with the positive terminal of the fast charging port and the positive terminal of the load. Extreme fast charging positive relay and fast charging negative relay connected in series with the negative terminal of the fast charging port and the negative terminal of the load; the detection module includes detecting the voltage of the positive and negative terminals of the battery, the voltage between the negative terminal of the battery and the positive terminal of the load, the positive terminal of the battery and the negative terminal of the load A detection circuit for the voltage between the battery negative terminal and the positive terminal of the fast charging port, and the voltage between the positive terminal of the battery and the negative terminal of the fast charging port. Based on the determined high-voltage power consumption state of the vehicle, the present invention determines whether the relay is stuck by controlling the detection module to detect the voltage value and controls the operation of the relay module, and performs fault processing accordingly to effectively avoid high-voltage risks.

Description

technical field [0001] The present invention generally relates to the field of vehicles, in particular to a device and method for detecting and processing high-voltage relay adhesion of electric vehicles. Background technique [0002] The safety of high-voltage power supply and charging safety of electric vehicles are very important, which puts forward higher requirements for the adhesion fault diagnosis of high-voltage relays. The current detection of relay sticking usually focuses on the relays used in the load power supply circuit, and it is impossible to accurately locate the specific relay that has a sticking fault and perform corresponding fault handling. In addition, currently there is no solution for detecting the adhesion of the high-voltage charging relay and responding to the fault. Contents of the invention [0003] In view of the above problems, embodiments of the present invention provide a device and method for detection and treatment of high voltage relay ...

AI Technical Summary

Problems solved by technology

The current relay sticking detection usually focuses on the relay used in the load power supply circuit, and it is impossible to accurately locate the specific relay that has a sticking fault and perform corresponding fault handling

In addition, there is currently no solution for detecting the adhesion of the high-voltage charging relay and responding to the fault

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