Automatic verification system for performance of insulation monitoring module

Abstract

The invention discloses an automatic verification system for the performance of an insulation monitoring module. The automatic verification system comprises a power supply module, a resistance-capacitance module, a CAN communication module and an MCU control module, wherein the resistance-capacitance module comprises a plurality of resistors, a plurality of capacitors and a plurality of electric control switches, and is electrically connected with the insulation monitoring module, a total positive electrode and a total negative electrode of the high-voltage power supply and a frame ground wire to form a test loop; the MCU control module communicates with an upper computer through the CAN communication module; and meanwhile, on-off of each electric control switch connected with the resistance-capacitance module is controlled, and the performance of the insulation monitoring module is verified by switching on different combinations of resistors and capacitors. The system provided by the invention can automatically control the set voltage, resistance and Y capacitor to access the test loop, and can feed back to the system in a CAN communication mode after the insulation module is tested. The verification system not only solves the problems of low manual test efficiency and complicated process, but also can test the performance of the insulation module under the conditions of different voltage platforms, insulation conditions and whole vehicle Y capacitance.

Description

technical field [0001] The invention relates to the field of high-voltage insulation, in particular to an automatic verification system for the performance of an insulation monitoring module. Background technique [0002] New energy vehicles are mainly driven by high-voltage power batteries, whose operating voltage is as high as several hundred volts, far higher than the safe voltage of the human body, and when the high-voltage system is discharged, its operating current can sometimes reach hundreds of amperes, which is also far beyond the safety of the human body Current, so in the high voltage system, its internal electrical insulation performance assessment is extremely important. Therefore, all high-voltage systems will be equipped with an insulation monitoring module, which will monitor the insulation resistance of the vehicle in real time. When an insulation failure occurs in the high-voltage system, the insulation monitoring module will alarm and prompt the main contr...

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Problems solved by technology

[0004] The purpose of the present invention is: this patent aims at the deficiencies of the prior art, comprehensively considers the vehicle and environmental factors, including the battery voltage platform, insulation degree, vehicle Y capacitance and the ambient temperature, and designs an automatic verification system to verify the insulation The performance of the monitoring module in setting different test conditions provides strong data support for the design and testing of insulation monitoring modules, so as to optimize insulation monitoring design and verify insulation monitoring products, and solve problems such as low verification efficiency and cumbersome operations

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