Battery Control System Wireless Relay Communication
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Solution Overview
Problem
Existing battery control systems face communication failures when wireless communication paths between battery cell management devices and assembled battery management devices are disrupted, leading to unmonitored battery cell states and potential control system failures.
Innovation Solution
A battery control system with multiple battery cell management devices and an assembled battery management device that switches to alternative communication paths or adjusts frequency and transmission output to maintain wireless communication, ensuring continuous monitoring and control even in the presence of communication failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wireless communication is used between battery cell management devices and assembled battery management device, then wiring cost and insulation cost are reduced, but communication failure may occur on the wireless communication path
Solution Approach 1:
A battery cell management device that is functioning normally acts as an intermediary relay node. When communication failure occurs between the assembled battery management device and a specific battery cell management device, the system routes communication through this intermediary device, enabling indirect communication and maintaining system reliability while preserving the wireless architecture's cost benefits.
Solution Approach 2:
The system dynamically changes communication parameters by switching between direct communication mode and relay communication mode based on communication status. When direct wireless communication fails, the system parameter changes to use an intermediary device for relay, thereby adapting to varying communication conditions and maintaining reliability without abandoning the wireless approach.
2Device complexity
If direct wireless communication is used between assembled battery management device and battery cell management devices, then communication path is simple, but communication failure cannot be avoided when wireless path is disrupted
Solution Approach 1:
The communication path is made dynamic rather than static. The system can switch between direct communication paths and relay communication paths through a functioning battery cell management device based on real-time communication status. This dynamic adaptability allows the system to maintain simplicity when direct communication works while ensuring reliability when disruptions occur.
Solution Approach 2:
The system prepares alternative communication paths in advance by establishing the capability to communicate through intermediary battery cell management devices. When communication failure is detected, the pre-prepared relay path is activated, avoiding the need for complex reconfiguration and maintaining system reliability without permanently increasing complexity.
Data Source
AI summary
A battery control system is provided with a plurality of battery cell management devices that are provided respectively corresponding to a plurality of battery cell groups each constituted by one or a plurality of battery cells and each acquire a measurement result of the state of charge of the battery cell of the corresponding battery cell group and an assembled battery management device for wirelessly communicating with the battery cell management devices. When it is impossible to wirelessly communicate with any of the battery cell management devices, the assembled battery management device wirelessly communicates with the said any of the battery cell management devices via any of other battery cell management devices except the said any of the battery cell management devices.