Battery Pack Management System Daisy Chain Failure Detection
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Solution Overview
Problem
Existing battery pack management systems are inefficient in detecting abnormalities in battery packs due to the need to check performance data one by one, leading to poor timeliness in identifying failures and potential safety risks.
Innovation Solution
A battery pack management system utilizing a daisy chain communication network with isolation units to quickly transmit sampled data and failure prompt signals, allowing for real-time detection of failures and improving the system's safety and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery management unit checks transmitted performance data of battery packs one by one, then it can identify failed battery packs, but it takes a long time to find abnormalities, resulting in poor timeliness
Solution Approach 1:
The patent segments the detection function by introducing a dedicated failure detection unit that operates independently from the performance data processing unit. This failure detection unit specifically monitors for failure prompt signals from battery packs, allowing parallel detection operations that reduce overall detection time while maintaining reliable failure identification
Solution Approach 2:
The patent introduces a failure prompt signal as an intermediary mechanism between battery packs and the management unit. When a battery pack fails, it actively sends a failure prompt signal through the daisy chain connection, enabling the management unit to detect failures immediately without having to sequentially check each pack's performance data
2Measurement precision
If multiple battery packs are monitored individually, then failure identification accuracy is improved, but the system complexity and detection time increase
Solution Approach 1:
The patent merges the failure detection function into the existing daisy chain communication structure. Instead of adding separate monitoring hardware for each battery pack, the failure detection unit utilizes the existing communication bus to transmit and receive failure prompt signals, maintaining individual pack monitoring capability while reducing overall system complexity
Solution Approach 2:
The patent implements self-service detection where each battery pack autonomously monitors its own status and actively sends failure prompt signals when anomalies are detected. This eliminates the need for the management unit to actively query each pack, reducing management system complexity while maintaining accurate failure identification across all packs
Data Source
AI summary
A battery pack management system includes a controller, an isolation unit, a plurality of battery pack management units, and a plurality of battery packs. The plurality of battery pack management units are connected in series by a first daisy chain, and the plurality of battery pack management units are also connected in series by a second daisy chain. The first daisy chain transmits sampled data that is collected by the battery pack management units from corresponding battery packs and transmits control instructions of the controller. The second daisy chain transmits a failure prompt signal which is generated by a battery pack management unit that detects a failure. A first battery pack management unit and a last battery pack management unit of the plurality of battery pack management units connected in series are connected to the controller through the isolation unit.