Electric vehicle high-voltage insulation monitoring and protecting system and application method thereof

Abstract

The invention discloses an electric vehicle high-voltage insulation monitoring and protecting system, comprising a high-voltage monitoring circuit, a controller and a power supply module, wherein the high-voltage monitoring circuit includes a waveform generator, a capacitor, a resistor and an insulation resistor positioned between the cathode of a high-voltage battery and a vehicle floor; the controller comprises an AC/DC (Alternating Current/Direct Current) converter, a comparator, a signal processing module and a logic judgment processing module; the power supply module is a power supply with adjustable output voltage; when in use, waveform signals are continuously generated by the waveform generator, the AC/DC converter monitors voltages at two ends of the resistor in real time so as to reflect the change of the resistor, and then a monitoring result is sequentially processed by the comparator, signal processing module and logic judgment processing module to obtain the real-time status of the insulation resistor so as to control insulation. The design not only has a simple monitoring program, an insulation monitoring reminding function and strong adjustable capacity, but also has high accuracy and security and wide application range.

Description

technical field [0001] The invention relates to a vehicle insulation monitoring and protection system, in particular to a high-voltage insulation monitoring and protection system for an electric vehicle and a method for using the same. Expand its scope of application. Background technique [0002] With the rapid development of new energy vehicles, electric vehicles are getting more and more attention. The main components of electric vehicles include power batteries, motors, electric steering, electric air conditioners, electric air compressors, and high-voltage cables. The voltage of power batteries is generally above 300V. Once insulation problems occur in these components, it will directly endanger driving. safety of passengers. Therefore, it is of great significance to equip electric vehicles with high-voltage insulation monitoring and protection devices to accurately detect the insulation performance of high-voltage electrical systems on the vehicle chassis in real tim...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects and problems existing in the prior art, such as cumbersome monitoring procedures, low precision, lack of insulation monitoring reminder function, and narrow application range, and provide a simple monitoring procedure, high precision, and insulation High-voltage insulation monitoring and protection system for electric vehicles with monitoring and reminder function and wide application range and its use method

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