Multi-site bus combination method and device of electrical vehicle

Abstract

The invention relates to multi-site bus combination method and device of an electrical vehicle. The invention is characterized in that an Ethernet bus, a CAN bus and an LIN bus are used for forming a multilayered distributed bus system; entertainment equipment with larger communication data volume is mounted on an Ethernet bus layer; electronic equipment with relatively low communication speed and a saddle module are connected to a CAN bus layer; data communication is carried out between the Ethernet bus and the Can bus through a full-vehicle control system; and the data communication is carried out between the CAN bus and the LIN bus through a CAN-LIN gateway. On the basis of meeting the requirement for the construction of a full-vehicle control network of an electrical vehicle, different equipment communication requirements are layered, and the bus advantages of different sites are combined, which guarantees communication requirements, the communication efficiency and the stability of a full-vehicle network system so as to construct a reliable communication network for the multimedia informational development of electrical vehicles.

Description

technical field [0001] The invention relates to an electric vehicle network communication control method and device. Background technique [0002] At present, the known pure electric vehicle bus system basically directly adopts the mature CAN bus system in traditional vehicles, and there is no bus system suitable for pure electric vehicles. The car is stronger and the environment is harsh, so the reliability of the network operation in the pure electric vehicle is particularly important. Vehicle electronic devices can be divided into four categories according to the type of communication data and performance requirements: infotainment system, power transmission system, body electronic system, and fault diagnosis system. Because the transmission rates of these four types of systems are very different, the bandwidth range, communication capability and communication speed of the CAN bus cannot fully meet the needs of multimedia entertainment applications in electric vehicles. ...

AI Technical Summary

Problems solved by technology

[0004] Huazhong University of Science and Technology Journal 2009, Issue 04, "CAN-Based Pure Electric Vehicle Vehicle Information System" proposed a technical solution, that is, the information system uses high-speed CAN and low-speed CAN to build a network information system, and does not consider pure electric vehicles. The application of the multimedia entertainment system of the car, with the continuous development of pure electric vehicles, will always face higher-speed communication requirements, and the network information system still cannot fully meet the network application requirements of pure electric vehicles

[0005] In the "Research on TTCAN Scheduling Algorithms Based on Electric Vehicles" in Manufacturing Automation, Issue 02, 2009, in order to solve the unpredictable message transmission time, low-priority messages are easy to be blocked, and the bus conforms unevenly, etc., the time trigger mechanism was cited to form TTCAN Protocol, the protocol is still based on the traditional CAN bus topology, the main difference is in the protocol of the application layer and the session layer, although it has been improved, it still cannot fundamentally realize the idea of ​​layered network, and cannot meet the application requirements of multimedia equipment

[0006]In the existing technology, there is no practical and feasible solution for building a vehicle network for pure electric vehicles

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