Detection system and detection method for electric vehicle motor controller

Abstract

The embodiment of the application provides a detection system and a detection method for an electric vehicle motor controller. The system may include a power battery, a power distribution box, a drivemotor controller, a processing module and an interlocking circuit. The power distribution box is provided with contactors. The two ends of each contact are respectively connected with the power battery and the drive motor controller. The processing module is connected with the contactors, and the interlocking circuit connects the processing module and the drive motor controller. The processing module detects the opening and closing states of the contactors when the motor controller is used for energy recovery; when the contactors are both in the closed state, the interlocking circuit is controlled to be in conduction; and when the contactors are in the open state, the interlocking circuit is controlled to break. The interlock circuit controls the drive motor controller to charge the powerbattery in the conduction state, and controls the drive motor controller to stop charging the power battery when disconnected. The entire device can increase the service life of the vehicle's power system, and can also reduce the risk of damage caused by device abnormal disconnection to the power system during power recovery.

Description

technical field [0001] The present application relates to the field of automobiles, in particular to a detection system for a motor controller of an electric vehicle and a detection method for a motor controller of an electric vehicle. Background technique [0002] With the development of science and technology, cars have become an indispensable means of transportation in life. [0003] In order to meet green environmental protection standards and sustainable development, automobiles are gradually changing from fuel vehicles to electric vehicles, and the core of electric vehicles is the power battery, which provides electricity for the operation of the vehicle. [0004] In order to improve the battery life of electric vehicles, a drive motor controller (referred to as electric control) is installed in the electric vehicle. The drive motor controller is respectively connected to the power battery and the drive motor. Converted to the AC power required by the drive motor. Whe...

AI Technical Summary

Problems solved by technology

[0005] When the drive motor controller converts AC power into DC power to charge the power battery, if the contactor is disconnected abnormally (such as contactor power failure, pop-up, misoperation, etc.), the drive motor controller cannot be notified in time to stop charging. Make the drive motor controller unable to enter the protection action in time, make the various devices in the drive motor controller work under differential pressure, damage each device, cause the vehicle to lose power, and seriously affect the driving safety of the driver

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