Battery Management Relay Communication for Obstructed Wireless Nodes
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Solution Overview
Problem
Existing battery management systems face challenges in maintaining effective wireless communication between nodes, especially when communication faults occur due to distance or obstacles, which can lead to incomplete or failed signal transmission.
Innovation Solution
The proposed battery management system employs an intermediate lower-level controller that selects and amplifies signals to ensure maximum power transmission to remaining lower-level controllers when the strength of the command signal from the upper-level controller meets a preset condition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication is performed directly between upper-level controller and lower-level controllers, then communication simplicity is maintained, but communication reliability deteriorates when obstacles or distance interfere
Solution Approach 1:
The patent introduces an intermediate lower-level controller that acts as a signal relay between the upper-level controller and other lower-level controllers. When the upper-level controller's signal strength is insufficient, the intermediate controller receives and retransmits the command signal with maximum power, ensuring reliable communication without requiring a complete restructuring of the communication system.
2Reliability
If signal transmission power is increased to overcome distance and obstacles, then communication reliability improves, but energy consumption increases
Solution Approach 1:
Instead of increasing the transmission power of the upper-level controller for all communications, the system uses an intermediate lower-level controller to amplify and retransmit signals only when necessary. This selective signal amplification approach ensures reliable communication for distant or obstructed nodes while minimizing overall energy consumption in the battery management system.
3Area of stationary object
If direct one-to-one communication is used between master and slave devices, then communication protocol simplicity is maintained, but communication coverage is limited when obstacles are present
Solution Approach 1:
The intermediate lower-level controller extends the communication coverage area by receiving command signals from the upper-level controller and retransmitting them to other lower-level controllers that are obscured or too distant. This approach increases coverage without fundamentally changing the existing master-slave communication protocol structure.
Solution Approach 2:
The communication network is segmented into direct communication zones (upper-level to lower-level) and relay communication zones (through intermediate lower-level controller). This segmentation allows the system to maintain simple direct communication when possible while utilizing relay communication only when necessary to extend coverage.
Data Source
AI summary
A battery management device according to an embodiment of the present invention includes an upper-level controller that transmits a command signal to a lower-level controller and receives a response signal to the command signal from the lower-level controller and a lower-level controller that performs an operation according to the command signal received from the upper-level controller and transmits the response signal to the command signal to the upper-level controller, and an intermediate lower-level controller selected according to a predetermined criterion among the lower-level controllers transmits a signal corresponding to the command signal transmitted by the upper-level controller with maximum power to the remaining lower-level controllers when strength of the command signal received from the upper-level controller satisfies a preset condition.