Battery Module Task Continuity During BMS Disconnection
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Solution Overview
Problem
Unpredictable connection failures between battery management systems and modules can lead to unknown operational states of battery modules, disrupting control and continuity of tasks.
Innovation Solution
Implementing a battery apparatus with a battery management system that uses UART or CAN communication to transmit control signals and operation information, allowing battery modules to continuously perform tasks even after disconnection by storing mode and task information, enabling seamless reconnection and maintaining operation continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the battery management system transmits one instruction and then disconnects the connection with the battery module to control another battery module, then the control efficiency and productivity are improved, but the reliability deteriorates due to unpredictable connection failures
Solution Approach 1:
The battery module performs a self-check of its current operation status before reconnection and transmits this status information to the battery management system in advance. This preliminary action ensures that the system is ready to resume control without loss of operational context, resolving the contradiction by maintaining reliability through pre-prepared status information while preserving the disconnected control architecture for productivity.
Solution Approach 2:
The battery module provides feedback about its current operation status to the battery management system after reconnection. This feedback mechanism allows the management system to understand what the module was doing during disconnection, enabling reliable resumption of control while maintaining the efficient disconnected architecture. The feedback loop resolves the contradiction by ensuring information continuity without requiring continuous connection.
2Reliability
If the battery management system maintains continuous connection with battery modules to monitor operation status, then the reliability is improved, but the device complexity and loss of time increase
Solution Approach 1:
The battery module autonomously monitors its own operation status and maintains this information locally during disconnection periods. This self-service capability eliminates the need for continuous external monitoring, reducing connection management complexity while ensuring reliability through self-maintained status information that is transmitted upon reconnection.
Solution Approach 2:
Instead of continuous monitoring, the system uses periodic status transmission where the battery module reports its status at specific intervals or upon reconnection events. This periodic action reduces the complexity of continuous connection management while maintaining reliability by ensuring status information is available at critical moments without requiring constant communication.
3Reliability
If the battery management system reconnects to a battery module after disconnection, then the reliability is improved, but the loss of time occurs due to unknown operation status
Solution Approach 1:
The battery module maintains its operation status information in memory during disconnection periods and prepares this information for immediate transmission upon reconnection. This preliminary preservation of status information eliminates the time required to determine operation status after reconnection, resolving the contradiction by ensuring both reliability through accurate status knowledge and time efficiency through pre-prepared information.
Solution Approach 2:
Upon reconnection, the battery module immediately transmits its current operation status to the battery management system through a feedback mechanism. This rapid feedback eliminates the time delay that would otherwise be required to determine the module's status, allowing the management system to resume control immediately while ensuring reliability through accurate status information.
Data Source
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AI summary
A battery apparatus (1) comprises a battery module (20) including a plurality of battery cells (210) and a battery management system (10) that receives operation information including mode information and task information about an operation being performed by the battery module (20) from the battery module (20). The modes may be an initializing mode, a measurement mode, a diagnosis mode, a cell balancing mode, an error mode or a or default mode. The battery management system (10) then generates a control signal based on the operation information and transmits it to the battery module (20). At least one mode includes a plurality of tasks of which the order of performance is predetermined, and the battery module (20) is configured to continue with the present task until it receives a control instruction from the battery management system (10) to proceed to the next task.