A method and system for dividing extended frames for CAN communication

By adopting the extended frame division method in the energy storage system, the message function ID, destination address and source address in CAN bus communication are clearly distinguished, which solves the problems of poor message scalability and readability, and improves communication efficiency and maintenance convenience.

CN115695070BActive Publication Date: 2025-09-23宁波德业储能科技有限公司
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Patent Information

Application Number
CN202211162228.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-09-23
Publication Date
2025-09-23
Estimated Expiration
2042-09-23

AI Technical Summary

Technical Problem

In energy storage systems, existing CAN bus communication methods cannot effectively distinguish different types of messages, resulting in poor message scalability and readability, affecting maintenance, debugging and upgrade efficiency.

Method used

An extended frame division method is adopted. By setting the number range of battery pack groups and battery packs, the hexadecimal encoding format of the extended frame ID is used to clearly distinguish the function ID, destination address and source address of the message data, including the function segment number and specific function number, to ensure that each CAN message frame has good readability.

Benefits of technology

It improves the scalability and readability of CAN communication, simplifies the maintenance, debugging and upgrade process, saves time, and improves data readability and maintenance convenience.

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Abstract

The present invention discloses a method and system for dividing an extended frame for CAN communication, which utilizes regular numbering between battery management systems, between battery packs and corresponding battery management systems, and between battery packs, and assigns values ​​to the second and third segments of the extended frame ID to reflect the target address and the source address, and reflects the function ID of the message data in the first segment of the extended frame ID to reflect the functional purpose of the extended frame ID message. Its embodiment is simple and clear, and has strong scalability. During the CAN communication process of the energy storage system, or during debugging, maintenance, expansion or upgrading, the message is sent through the extended frame divided by the present invention. Through the extended frame ID, the type of the message and the source address and target address corresponding to the message data can be quickly known, which greatly improves the readability of the data.
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