ID distribution system and method of CAN bus network

Abstract

The invention provides an ID distribution system and method of a CAN bus network. The system comprises a main controller and first to Nth secondary controllers, wherein the main controller is used for distributing IDs for the first to Nth secondary controllers, ID distribution commands are sent to the first secondary controller through ID distribution lines, ID information is sent to the corresponding secondary controllers through a CAN bus, and abnormal information is received through an IO diagnosis line. Each of the first to Nth secondary controllers is used for activating a corresponding CAN bus receiving function after receiving the ID distribution commands sent by the main controller through each ID distribution line, for updating the ID of the secondary controller according to the received ID information, and for activating the CAN bus receiving function of the next secondary controller after ID updating of the secondary controller is completed. According to the system, on-line distribution of the IDs can be achieved through matching between the ID distribution lines and the CAN bus, logic is clear, meanwhile the normal information for auxiliary control is judged through the IO diagnosis line, safety and reliability are achieved, and the whole system is simple in structure, few in the number of hardware resources, and low in cost.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to an ID distribution system and method of a CAN bus network. Background technique [0002] In the CAN bus network, the main controller is unique and there are many auxiliary controllers. If ID is added to the code layer, a large number of matching problems will be involved in the subsequent maintenance process. For example, in a battery management system (BMS), including a main controller and multiple auxiliary controllers, especially when there are a large number of auxiliary controllers, if the auxiliary controller with ID 1 is damaged, you must find the The auxiliary controller whose ID is 1 is matched and replaced, which increases the workload and wastes manpower and material resources. Contents of the invention [0003] The purpose of the present invention is to solve at least one of the above-mentioned technical drawbacks. [0004] For this reason, the first...

AI Technical Summary

Problems solved by technology

For example, in a battery management system (BMS), including a main controller and multiple auxiliary controllers, especially when there are a large number of auxiliary controllers, if the auxiliary controller with ID 1 is damaged, you must find the The auxiliary controller whose ID is 1 is matched and replaced, which increases the workload and wastes manpower and material resources.

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