Pure electric motor coach communication system and method based on three CAN bus

Abstract

The invention provides a pure electric passenger vehicle communication system based on three ways of CAN buses, comprising a plurality of controllers and three ways of CAN buses, wherein, the CAN buses comprise three ways of CAN buses which are coupled with the plurality of controllers and consist of a CAN1 bus, a CAN2 bus, and a CAN3 bus; the CAN1 bus is a high-speed CAN bus and used for the control of a power system; the CAN2 bus is a high-speed CAN bus and used for the transmission of power battery monometer data; and the CAN3 bus is a low-speed CAN bus, provided with a plurality of vehicle body control nodes, and used for achieving the information collection and control of each part of the vehicle body. The system causes the loading rate of the power system control bus to be greatly reduced, ensures the real-time performance of the control, and improves the driving safety of the electric vehicle.

Description

technical field [0001] The invention relates to the technical field of CAN bus communication of a pure electric bus control system, in particular, the invention relates to a pure electric bus communication system and method based on a three-way CAN bus. Background technique [0002] The increasingly prominent oil crisis and environmental pollution have made electric vehicles more and more aroused the attention of the society and become the development direction of future automobiles. Compared with traditional internal combustion engine vehicles, electric vehicles are still in the initial stage of industrialization in foreign countries. The related high-tech and products still rely on the support of supporting suppliers, and a new industrial system has not yet been formed. At the same time, in developed countries, the huge production scale and investment in social infrastructure formed by the traditional automobile industry, as well as the strong inertia of development, may i...

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Problems solved by technology

[0003] Chinese patent application, whose publication number is CN1649345A, and the application titled "CAN bus-based pure electric bus communication method" discloses a CAN bus communication method for pure electric buses, which is based on a single CAN bus to achieve pure The communication of the electric bus uses a single CAN bus to realize the information communication of the motor controller, the electronic throttle controller, the cab display, the ABS controller and the power battery management system. There have been breakthroughs in the development of communication technology, but there is still a problem that the speed of electronic control signal transmission will be relatively lagging due to the exponential growth of electronic control signals in pure electric buses that are rapidly developing

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