Distributed Battery Management System Identification Distribution
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Solution Overview
Problem
Distributed battery management systems face communication conflict issues, high complexity, and low reliability in identifying and managing multiple data acquisition modules, particularly due to CAN bus conflicts and dependency between modules.
Innovation Solution
A method and system where data acquisition modules send identification distribution requests to a battery management control module, which activates and assigns unique identification messages to each module independently, allowing them to operate without sequential activation or specific hardware configurations, enabling simultaneous and reliable identification distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different application programs and CAN bus identities are configured for each data acquisition module, then communication conflicts are resolved, but management complexity increases and maintenance becomes difficult
Solution Approach 1:
The patent applies homogeneity by making all data acquisition modules identical in hardware configuration and application program. Each module has the same functional capabilities and communicates using a standardized approach, eliminating the need for different application programs while maintaining communication reliability through uniform module design.
Solution Approach 2:
The control module automatically assigns unique identifiers to data acquisition modules without manual intervention. The system self-configures by having modules send identification requests and receiving automatic assignments, eliminating manual jumper settings and reducing management complexity while ensuring unique identification for conflict-free communication.
2Reliability
If an identification module is added to each data acquisition module, then unique identification is achieved, but hardware complexity increases and maintenance difficulty increases
Solution Approach 1:
The control module serves multiple functions: it acts as the central controller for battery management and simultaneously functions as the identification assignment authority. This eliminates the need for separate identification modules in each data acquisition module, reducing hardware complexity while maintaining unique identification capability through the control module's assignment function.
3Ease of manufacture
If external jumper circuits are coupled to data acquisition modules, then CAN bus addresses are configured, but manual setting is required and errors are prone
Solution Approach 1:
The system performs automatic identification assignment where the control module sends identification requests to data acquisition modules and automatically assigns unique identifiers in response. This self-service mechanism eliminates manual jumper setting operations, reducing human error while maintaining module uniformity, as all modules are configured automatically through standardized communication protocols.
4Device complexity
If data acquisition modules are coupled in series, then identification distribution is achieved, but system reliability decreases due to sequential activation dependency
Solution Approach 1:
The patent segments the identification assignment process into independent request-response transactions between the control module and each data acquisition module. Instead of sequential activation through series coupling, each module can independently request and receive its identifier, eliminating dependency on other modules being activated first and improving system reliability while maintaining assignment simplicity.
Data Source
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AI summary
A distributed battery management system and a method of identification distribution are provided. The method comprises: a) all the data acquisition modules sending identification distribution requests to the battery management control module (3); b) the battery management control module (3) activating a data acquisition module (4), and sending to the data acquisition module (4) an identification message; c) the data acquisition module (4) determining itself whether it is activated, and if yes, receiving and storing the identification message and sending an identification distribution reply and the identification message received to the battery management control module (3), otherwise, the data acquisition module (4) sending another identification distribution request to the battery management control module (3) and performing step b) to activate the data acquisition module; and d) after the battery management control module (3) receiving the identification distribution reply and the identification message, performing step b) to d) to realize an identification distribution of a next data acquisition module.