Limp control system and limp control method for electric automobile and electric automobile

Abstract

The embodiment of the invention discloses a limp control system and a limp control method for an electric automobile and the electric automobile. The limp control system comprises a power supply and a control power supply, a voltage monitor, a standby controller and a contactor, wherein the voltage monitor is used for monitoring the voltage of the power supply and the voltage of the control power supply; the standby controller is respectively connected with the voltage monitor and the control power supply and used for sending out a contactor connection signal when a CAN of a vehicle control unit is lost of signal, and the voltages of the power supply and the control power supply are normal; the contactor is distributed between the power supply and a motor controller and used for connecting a power transmission circuit from the power supply to the motor controller based on the contactor connection signal. After the implementation method of the invention is applied, when the CAN communication of a vehicle is invalid, simple control is still performed on the motor controller, the electric automobile can be driven to a safe place for maintenance, so that the convenience in maintenance of the electric automobile is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a limp control system and method of an electric vehicle and the electric vehicle. Background technique [0002] The latest national standard "Terms and Definitions of Vehicle and Trailer Types" (GB / T 3730.1-2001) has the following definition for a vehicle: a non-rail-mounted vehicle driven by power with 4 or more wheels, mainly used for : Carrying people and (or) goods; towing vehicles carrying people and (or) goods; special purpose. Energy shortages, oil crises and environmental pollution are intensifying, which have a huge impact on people's lives and are directly related to the sustainable development of the country's economy and society. All countries in the world are actively developing new energy technologies. [0003] As a new energy vehicle with reduced oil consumption, low pollution, and low noise, electric vehicles are considered to be an important way to solve th...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, when the communication of the vehicle Controller Area Network (CAN) fails, the electric vehicle generally stops the output of the high-voltage power supply, and the vehicle cannot continue to drive.

Therefore, the driver needs to use auxiliary equipment such as a trailer to drag the electric vehicle to the maintenance point for maintenance, which causes the driver to handle very inconveniently, thereby reducing the convenience of maintenance of the electric vehicle

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