High voltage cabinet safety monitoring system for electric vehicles

Abstract

The invention relates to a high-voltage cabinet safety monitoring system for electric automobiles. The high-voltage cabinet safety monitoring system comprises high-voltage contactors which are arranged in high-voltage power-on circuits of an electric automobile respectively, and a controller, a plurality of temperature sensors, an acceleration sensor, and a CAN communication module which are arranged in the high-voltage cabinet, wherein detecting ends of the temperature sensors are respectively arranged on bolts in the high-voltage cabinet; temperature signal output ends of the temperature sensors, and an acceleration signal output end of the acceleration sensor are respectively connected with signal input ends of the controller; control signal output ends of the controller are respectively connected with control signal input ends of the high-voltage contactors; a parameter signal output end of the controller is connected with a whole-automobile controller of the electric automobile through the CAN communication module. The high-voltage cabinet safety monitoring system is simple in structure and convenient to use, and adopts the CAN communication module so as to transmit signals acquired by a signal acquisition module to the whole-automobile controller in real time, so that working parameters in the high-voltage cabinet are accurately known in real time, and ensuring the safety of the high-voltage cabinet and the safety of the whole automobile is facilitated.

Description

technical field [0001] The invention belongs to the field of high-voltage safety of new energy vehicles, and in particular relates to a safety monitoring system for a high-voltage cabinet for electric vehicles. Background technique [0002] In recent years, due to environmental and energy issues, the state has vigorously supported the development of new energy vehicles, especially pure electric vehicles. As an indispensable part of electric vehicles, the function and safety of high-voltage cabinets are getting more and more attention. At present, the high-voltage cabinets used in electric vehicles are composed of fuses, contactors, copper bars, connectors, etc. Among them, the fuses have a passive protection function. When a short circuit occurs in the high-voltage system, the high-voltage connection can be quickly disconnected; the contactor is a switching device. It has the function of switching high voltage. These are only the basic functions of the high-voltage cabinet...

AI Technical Summary

Problems solved by technology

This makes the vehicle controller unable to accurately grasp the working status of each high-voltage component

[0004] 2. There are a large number of bolt connections in the high-voltage cabinet, and the status of the bolt connections is not monitored. Once the bolts become loose, it will cause serious consequences

[0005] 3. In the event of serious accidents such as collisions and rollovers, there is no function to actively cut off the high voltage

[0006] 4. Connectors, contactors and fuses are not monitored, and when there is a problem with the component, the alarm cannot be reported in time

[0007] 5. It is impossible to monitor the insulation state inside the high-voltage cabinet, and when an insulation failure occurs, an alarm cannot be issued

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