Device and method for detecting insulating property of high-voltage ancillary equipment of electromobile

Abstract

The embodiment of the invention provides a device and a method for detecting the insulating property of high-voltage ancillary equipment of an electromobile. The device comprises a high-voltage power supply, a relay switch matrix circuit, an adapter wire harness, a programmable logic device, an acquisition circuit and a single-chip microcomputer, wherein the single-chip microcomputer sends a control command to the programmable logic device according to the detected high-voltage grade, and the programmable logic device closes corresponding relay switches; the relay switch matrix circuit transmits high-voltage current output by the high-voltage power supply to the adapter wire harness through the closed relay switch; the adapter wire harness transmits high-voltage current to gating connector terminals; the acquisition circuit is connected with the electric conduction parts of all connector terminals of a high-voltage wire harness, and transmits the acquired voltage value to the single-chip microcomputer, and the single-chip microcomputer calculates the insulating resistance value according to the voltage value. According to the invention, the single-chip microcomputer and the programmable logic device are adopted for control, so that automatic and intelligent testing of the insulating resistance is realized, and accordingly, the workload of quality control personnel is reduced.

Description

technical field [0001] The invention relates to the technical field of insulation performance detection, in particular to a device and method for insulation performance detection of a high-voltage auxiliary electrical wiring harness of an electric vehicle. Background technique [0002] Insulation performance test is an important indicator in the test of electrical equipment safety requirements, and it is also one of the main parameters to effectively judge whether the insulator is complete and whether the surface of the insulator is polluted. A common and very effective method. By measuring the insulation resistance value of electrical equipment, defects such as general dampness, local severe dampness and penetration can be detected in time. [0003] The high-voltage auxiliary electrical wiring harness of electric vehicles acts as a bridge between high-voltage auxiliary electrical appliances and high-voltage electrical appliances, and plays the role of power transmission. ...

AI Technical Summary

Problems solved by technology

[0007] The disadvantage of the method of detecting the insulation resistance value of the connector and the high-voltage auxiliary electrical wire harness with many pins in the above-mentioned prior art is that: because the connector terminals of the high-voltage auxiliary electrical wire harness are more and more densely distributed, it is difficult to test a certain It is very easy to touch other terminals when the terminal

It is time-consuming and inconvenient to manually connect the wires and define the plug-in wires according to the pins for each test.

Due to the large number of pins, it takes a long time for manual operation, and the detection results depend largely on the technical level and work experience of the personnel, and it is easy to miss and erroneously check.

When testing some connectors with pins, the test clips can easily cause the pins of the connector to be short-circuited, making it difficult to make a real judgment on its insulation performance

It is more difficult to detect the connectors with jacks in the high-voltage auxiliary electrical harness

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