Real-time monitoring method and system for service life of high-voltage contactor

Abstract

The invention relates to the field of high-voltage contactors, in particular to a real-time monitoring method and system for the service life of a high-voltage contactor. The method is applied to a battery connection circuit, and comprises the following steps: providing a standard resistance value of the high-voltage contactor; obtaining a first resistance value of the first contactor and a secondresistance value of the second contactor in real time, and giving an alarm according to the first resistance value, the second resistance value and the standard resistance value. The technical schemeof the invention has the beneficial effects that the current service life condition of the high-voltage contactor can be accurately detected in real time, the problem of over-temperature caused by the fact that the high-voltage contactor cannot be predicted or warned in advance and is continuously used after the service life is ended can be avoided, and the risk caused by function failure of a battery or other high-voltage components can be further avoided.

Description

technical field [0001] The invention relates to the field of high-voltage contactors, in particular to a method and system for real-time monitoring of the life of a high-voltage contactor. Background technique [0002] With the popularization and development of electric vehicles and plug-in hybrid vehicles, the safety of high-voltage electricity is becoming more and more important. Usually, high-voltage contactors are installed in the high-voltage main circuit of electric vehicles. The failure of high-voltage contactors will have serious impact on the operation of electric vehicles. Very serious effects. Therefore, during operation, real-time diagnosis of the state of the high-voltage contactor is required to confirm whether the state of the contactor is consistent with the control requirements. [0003] In the prior art, the detection of the working state of the high-voltage contactor is often realized by collecting the temperature, voltage value, current value or capaciti...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the detection of the working state of the high-voltage contactor is often realized by collecting the temperature, voltage value, current value or capacitive load state for a period of time and comparing it with the historical experience change. However, this method needs to be based on the historical experience change If there is an error in the change value of the historical experience change, it will lead to misjudgment in the subsequent state detection, and it is impossible to quickly and accurately obtain the working state of the high-voltage contactor, and it is impossible to predict or warn the end of the life of the high-voltage contactor in advance, and then Problems that lead to overheating of high voltage contactors

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