Electric automobile CAN bus control method and system

Abstract

The invention discloses an electric automobile CAN bus control method and system, a CAN bus is of a four-network-segment topological structure and comprises a power P-CAN, a chassis C-CAN, an automobile body B-CAN and a remote T-CAN, each network segment is provided with a controller, and the method comprises the steps that when a whole automobile is in a CG OFF state, the network segment controllers of the power P-CAN and the chassis C-CAN synchronously and immediately enter a dormant state; when the vehicle body B-CAN meets the OSEK network management dormancy condition within the preset time, a network segment controller of the vehicle body B-CAN enters a dormancy state; and after the network segment controller of the vehicle body B-CAN enters the dormant state, the network segment controller of the remote T-CAN enters the dormant state under the condition that the remote T-CAN meets the OSEK network management dormant condition, and finally, the network segment controllers of the power P-CAN, the chassis C-CAN, the vehicle body B-CAN and the remote T-CAN all enter the dormant state, so that the dormant state of the whole vehicle is realized. According to the invention, the problem that the dormancy wake-up logic design of the CAN bus is not reasonable enough in the prior art can be solved, the electric quantity is saved, and the vehicle can be normally started without being turned on for a long time and still without power shortage.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an electric vehicle CAN bus control method and system. Background technique [0002] With the rapid development of the automobile industry and the continuous improvement of people's living conditions, automobiles have become one of the indispensable means of transportation for people to travel. Car ownership is increasing year by year, and more and more people own private cars. Electric vehicles are the current development direction of the automotive industry. [0003] Automobile electrification, intelligence, and interconnection are the main trends in the development of today's automobiles, which have boosted major automobile OEMs to increase research on electric vehicles. The technology and strategy of electric vehicles have gradually matured, and the realization of functions has also advanced from basic functions to complex functions. The distribution of CAN bus in elect...

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Problems solved by technology

[0004] In view of the above problems, an object of the present invention is to propose a kind of electric vehicle CAN bus control method, to solve the problem that the dormancy wake-up logic design of CAN bus in the prior art is not reasonable enough

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