A method and device for detecting anomalies in an electric vehicle CAN network

Abstract

The invention relates to the field of electric vehicles, and discloses an abnormality detection method for CAN networks of electric vehicles. It includes the following process: the vehicle controller is configured with multiple CAN networks, the CAN network includes the first CAN network, and the power-related controller is configured on the nodes of the first CAN network; when a message is detected, it is judged whether it is a vehicle Message transmission between the controller and the first CAN network; if it is, then use the method of receiving and sending the message ID to detect whether there is an external device sending a virtual message; if not, then judge whether there is a message sent by the vehicle controller If there is a fault, disconnect the power supply of the data terminal. If the fault recovers after the power is disconnected, it is judged that the data terminal is invaded by the external network. If it does not exist, it is judged that the CAN network access intrusion device. This scheme has low requirements on the computing power of the chip; the first CAN network can send fault information immediately, meeting the real-time requirements of power equipment. Also disclosed is an electric vehicle CAN network anomaly detection device.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle CAN network abnormality detection method and device. Background technique [0002] The electronic control components of electric vehicles (such as micro control unit MCU, battery management system BMS, electric power steering system EPS, brake anti-lock braking system ABS, instrument controller, etc.) are connected to VCU through CAN network to realize mutual communication. Communication, CAN network design did not consider information security at the beginning, vulnerable to malicious attacks, threatening vehicle safety. With the development of Internet technology, it has become a trend for cars to connect to the Internet through devices such as data terminals. These networked electronic devices may become a way for hackers to invade the vehicle CAN network system. [0003] In the traditional method, the sending end uses the AES encryption algorith...

AI Technical Summary

Problems solved by technology

However, the algorithm is too complicated, which puts forward higher requirements on the computing power of the controller chip; this method has a long delay time, and it is difficult to meet the real-time requirements of the power CAN network

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