High-voltage interlocking system of battery electric vehicle and battery electric vehicle using high-voltage interlocking system

Abstract

The invention belongs to the relevant field of automobile control of new energy automobiles, and particularly relates to a high-voltage interlocking system of a battery electric vehicle and the battery electric vehicle using the high-voltage interlocking system. The high-voltage interlocking system discloses a VCU first high voltage interlock loop, a VCU second high voltage interlock loop and an automobile VCU, wherein the VCU first high voltage interlock loop comprises a MCU, a vehicle-mounted charger input plug-in, an MCU high-voltage wiring plug-in, a vehicle-mounted charger high-voltage wiring plug-in and a high-voltage wiring box input plug-in; the VCU second high voltage interlock loop comprises an air conditioning compressor input plug-in and an air conditioning compressor high voltage wiring plug-in; and when interlocking and disconnecting of the VCU first high voltage interlocking loop are detected, fault information is recorded, an automobile continues to run or a vehicle power system is cut according to the vehicle speed, when interlocking and disconnecting of the VCU second high voltage interlocking loop are detected, fault information is recorded, and the correspondingfault indicating lamp is lightened. According to the system, the condition that a high-voltage power supply is frequently cut off, and the user experience and the service life of electrical element are influenced is avoided.

Description

technical field [0001] The invention belongs to the related field of new energy vehicle vehicle control, and in particular relates to a pure electric vehicle high-voltage interlocking system and a pure electric vehicle applying the high-voltage interlocking system. Background technique [0002] Pure electric vehicles refer to electric vehicles that are completely driven by batteries, and the working voltage is as high as several hundred volts, which is much higher than the safe voltage. When the high-voltage system is working, the discharge current may reach tens of amperes, or even hundreds of amperes. Compared with traditional vehicles, pure electric vehicles use large-capacity, high-voltage power batteries, high-voltage motors and electric drive control systems, and use a large number of high-voltage accessory equipment, such as: electric air conditioners, PCT electric heaters and DC / DC converter, etc. [0003] With the increase of high-voltage components, high-voltage...

AI Technical Summary

Problems solved by technology

However, once the high-voltage interlock alarm is detected, the system will cut off the high-voltage power supply. Frequently cutting off the high-voltage power supply will not only affect the user experience but also affect the service life of electrical components such as air conditioners in the car.

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