Battery Pack Wireless Management with Priority Retransmission
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Solution Overview
Problem
Current battery management systems for electric and hybrid vehicles using wireless communication face issues with data loss due to signal interference and inefficient data exchange, particularly when multiple secondary units experience connection problems with the main unit.
Innovation Solution
A method that detects transmission problems, selects a secondary unit based on priority, and retransmits data within a specified time interval using a predetermined order, ensuring all data is transmitted deterministically and robustly, even in the presence of nearby signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel hopping is used to transmit data over different frequencies, then data loss due to signal interference is reduced, but data exchange speed decreases when multiple secondary units experience connection problems
Solution Approach 1:
The system performs preliminary detection of transmission problems and maintains a priority queue of secondary units that need retransmission. By preparing the retransmission schedule in advance based on detected issues, the system avoids ad-hoc delays and ensures efficient data exchange while maintaining reliability through pre-planned retransmission attempts.
Solution Approach 2:
The system dynamically adjusts the retransmission process by selecting secondary units based on a priority order that can be modified during operation. When transmission problems are detected, the system adaptively retransmits data to specific secondary units in priority order rather than attempting all units simultaneously, optimizing both reliability and data exchange speed under varying communication conditions.
2Loss of information
If retransmission is performed for all secondary units experiencing connection problems, then data completeness is improved, but communication time increases
Solution Approach 1:
The system performs preliminary detection of transmission problems and maintains a priority queue of secondary units that need retransmission. By preparing the retransmission schedule in advance based on detected issues, the system avoids ad-hoc delays and ensures efficient data exchange while maintaining reliability through pre-planned retransmission attempts.
Solution Approach 2:
Instead of uniformly retransmitting to all secondary units, the system applies local quality by treating each secondary unit differently based on its specific transmission status and priority level. Units with higher priority or more severe transmission issues receive retransmission attempts first, optimizing the balance between data completeness and communication time.
3Device complexity
If wireless communication is used to reduce wiring complexity, then installation cost and space requirements decrease, but data loss due to signal interference increases
Solution Approach 1:
The system replaces the mechanical wiring system with wireless communication to reduce installation complexity and space requirements. To compensate for the reduced reliability of wireless communication, the system implements a robust retransmission mechanism that detects transmission problems and systematically retransmits data to affected secondary units, ensuring data integrity without requiring physical cable connections.
Solution Approach 2:
The system employs feedback mechanisms where the main unit detects transmission problems with secondary units and triggers appropriate retransmission actions. This closed-loop feedback ensures that data loss due to wireless interference is corrected, maintaining reliability comparable to wired systems while preserving the advantages of reduced wiring complexity.
Data Source
Figure 1~3
AI summary
The invention relates to a method for managing a battery of rechargeable batteries (10) by a computer comprising a main unit (M1) and secondary units (N1-N12) connected together by wireless communication means. The method comprises a recurring data exchange operation between the main unit and each secondary unit according to a predetermined exchange order. According to the invention, the method comprises the steps of: - detecting any data transmission problem between the main unit and a set of at least one secondary unit, - selecting a single secondary unit according to a predetermined priority order, and - retransmitting data between said single secondary unit and the main unit.