Wireless Battery Management with Clock Sync and Daisy-Chain Links
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Solution Overview
Problem
The existing battery management systems (BMS) require numerous wires for connecting to energy storage devices, increasing production costs, risks of short circuits, and complicating maintenance, while wireless management systems face issues with signal interference and device recognition.
Innovation Solution
A wireless management system with a control substrate and energy storage units, utilizing synchronized clocks and daisy chain communication to manage energy storage devices efficiently, reducing signal interference and recognition burdens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wireless communication technology is used to manage energy storage devices, then the number of connection wires is reduced and production cost decreases, but signal interference and device unrecognition problems occur
Solution Approach 1:
The system performs clock synchronization before actual data transmission. The control substrate sends a clock synchronization signal to all energy storage units beforehand, ensuring that all devices have synchronized time bases before measurement and communication operations begin. This preliminary action prevents timing conflicts and signal interference during subsequent operations.
Solution Approach 2:
The patent introduces a daisy-chain communication topology where each energy storage unit communicates with its neighbors in sequence. This intermediary communication structure reduces signal interference by limiting the number of simultaneous transmitters and provides clear signal paths, solving the recognition and interference problems while maintaining wireless convenience.
2Ease of operation
If each energy storage device is directly connected to the management device for data transmission, then data acquisition is straightforward, but the number of wires increases and the risk of short circuits increases
Solution Approach 1:
The system segments the communication network into a hierarchical structure with one control substrate and multiple energy storage units arranged in a daisy-chain topology. Each unit communicates only with its immediate neighbors rather than all devices connecting directly to the management device. This segmentation reduces wire complexity while maintaining operational simplicity through structured data flow.
Solution Approach 2:
The patent transitions from a star topology (all devices connected to central management device) to a linear daisy-chain topology. This dimensional reorganization of the communication architecture reduces the number of connection points at the management device while preserving data transmission capability through the chain structure.
3Measurement precision
If clock synchronization is implemented among all devices, then measurement timing precision is improved, but communication protocol complexity increases
Solution Approach 1:
Clock synchronization is performed as a preliminary step before measurement operations. The control substrate sends synchronization signals to all energy storage units at the beginning of each measurement cycle, ensuring all devices share the same time reference. This one-time preliminary synchronization simplifies the overall protocol compared to continuous synchronization mechanisms.
Solution Approach 2:
The system implements a feedback mechanism where the control substrate monitors the synchronization status and sends correction signals if timing drift is detected. This feedback loop maintains measurement precision without requiring complex continuous synchronization protocols, as corrections are only applied when needed.
Data Source
AI summary
A wireless management system and method are provided. The system synchronizes a first clock of a control substrate and a second clock of each of multiple energy storage units based on a first time calibration signal transmitted by the control substrate. The energy storage units measure energy storage devices of the energy storage units at a designated time point based on a measurement signal transmitted by the control substrate to obtain multiple measurement data, wherein the measurement signal is configured to indicate the designated time point. The control substrate obtains the measurement data corresponding to the designated time point from the energy storage units based on a reply signal transmitted by the energy storage units.