Automobile high-voltage cable joint state detection method and system

Abstract

The invention brings forward a high-voltage cable joint state detection method. The method comprises the following steps: acquiring a cable joint temperature, a cable current and an environment temperature; respectively establishing membership functions; converting the environment temperature, the cable joint temperature and the cable current into fuzzy values respectively according to the membership functions; determining fuzzy subclasses which the fuzzy values of the environment temperature, the cable joint temperature and the cable current belong to in corresponding domain spaces; and establishing fuzzy inference rules so as to determine cable joint states and generation factors for the over-high cable joint temperature. According to the detection method provided by the embodiment of the invention, whether cable joints are abnormal and reasons why problems occur can be accurately and reliably analyzed, and alarms can be given timely, such that risks caused by abnormities of the cable joints can be avoided, and life and property safety of passengers are guaranteed. The invention also brings forward an automobile high-voltage cable joint state detection system.

Description

technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a method and system for detecting the state of a high-voltage cable joint of an automobile. Background technique [0002] At present, under the pressure of energy crisis and environmental protection, new energy vehicles have achieved rapid development in recent years, but at the same time some safety accidents and safety hazards have been exposed. According to analysis, one of the main factors causing safety accidents of new energy vehicles One is that the high-voltage cable joints are loose, which will cause excessive contact resistance and cause combustion or explosion. This is because the dynamic vibration and impact of the vehicle during driving will cause the loosening of the cable joints to a certain extent. However, at the present stage, in the control and detection of new energy vehicles, there are few methods for detecting the state of the above-mentione...

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Problems solved by technology

[0002] At present, under the pressure of energy crisis and environmental protection, new energy vehicles have achieved rapid development in recent years, but at the same time some safety accidents and safety hazards have been exposed. According to analysis, one of the main factors causing safety accidents of new energy vehicles One is that the high-voltage cable joints are loose, which will cause excessive contact resistance and cause combustion or explosion. This is because the dynamic vibration and impact of the vehicle during driving will cause the loosening of the cable joints to a certain extent.

However, at the present stage, in the control and detection of new energy vehicles, there are few methods for detecting the state of the above-mentioned high-voltage cable joints. It is not high, and the factors that cause the abnormality of the high-voltage cable joint cannot be determined, which brings inconvenience to the later maintenance

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