Battery Management Message Sequencing for Stale Data Detection
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Solution Overview
Problem
Conventional battery management systems face issues of lack of flexibility in pack design, wasted space due to connectors and cabling, and vulnerability to interference and cyber-attacks in wireless technologies.
Innovation Solution
Implementing a block sequence protocol in the battery management system to encode and transmit battery sensor data, ensuring data freshness and integrity through a wireless black channel by shuffling data types within messages, and using a network controller to verify conformance with the protocol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless technologies are used to connect battery monitoring components to a central controller, then flexibility in pack design and space utilization are improved, but vulnerability to interference and cyber-attacks increases
Solution Approach 1:
The patent segments the communication protocol into distinct functional layers: physical layer for signal transmission, data link layer for error detection and correction, and application layer for message formatting. This segmentation allows each layer to be optimized independently, with security measures implemented at specific layers without affecting overall system flexibility.
Solution Approach 2:
The patent introduces an intermediary communication protocol that acts as a mediator between the battery monitoring components and the central controller. This protocol includes built-in authentication mechanisms, data encryption, and integrity verification that protect against cyber-attacks while maintaining wireless communication flexibility.
2Reliability
If conventional wired battery management systems are used, then reliability and security are improved, but flexibility in pack design and space utilization deteriorate due to connectors and cabling
Solution Approach 1:
The patent replaces the mechanical wired connection system with a wireless communication system. Battery monitoring components transmit data wirelessly to the central controller, eliminating the need for physical connectors and cabling. This substitution maintains security through protocol-level authentication and encryption while dramatically improving design flexibility and reducing pack space requirements.
3Ease of operation
If data blocks are transmitted in a fixed sequence, then ease of processing is improved, but data freshness and integrity deteriorate due to potential stale data transmission
Solution Approach 1:
The patent implements a dynamic message construction process where the sequence and inclusion of data blocks are determined based on current system state and requirements. Rather than using a fixed predetermined sequence, the system dynamically selects which data blocks to include and their ordering, ensuring that only fresh and relevant data are transmitted while maintaining processing efficiency through structured protocols.
Data Source
AI summary
In a particular embodiment, functional safety in a battery management system includes a network controller of a battery management system (BMS) receiving from a module monitoring system (MMS) of the BMS, a message that includes a first set of data type blocks. In this embodiment, the network controller determines for the first set of data type blocks, a block sequence order that indicates a position of each data type block within the message. The network controller determines whether the message conforms with a predetermined block sequence protocol. In response to determining that the message does not conform with a predetermined block sequence protocol, the network controller determines that data within the message is stale.