Battery Rack Data Backup During BMS Communication Failure
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Solution Overview
Problem
Energy storage systems face data loss due to communication failures between battery management systems, particularly when measurement data cannot be transmitted from the communication conversion device to the server.
Innovation Solution
Implementing a dual management system where the communication conversion device stores measurement data in its memory when a failure flag is activated, allowing the external controller to read and analyze the data, thereby preventing data loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If measurement data is transmitted from the communication conversion device to the server using TCP communication, then data can be centralized for analysis, but data loss occurs when transmission fails due to fire or unexpected failure
Solution Approach 1:
The communication conversion device performs preliminary action by storing measurement data in its memory before the data is needed for analysis. When a failure flag is activated indicating transmission failure, the previously stored data is immediately available for retrieval, preventing data loss without requiring re-transmission.
Solution Approach 2:
The communication conversion device creates a copy of the measurement data in its internal memory as a backup. This duplicate storage ensures that even if the original transmission path fails, a copy of the data remains available for analysis, resolving the contradiction between centralized analysis and data loss prevention.
2Ease of operation
If measurement data is stored in the server only, then data management is simplified, but data becomes inaccessible when communication failure occurs
Solution Approach 1:
The communication conversion device acts as an intermediary between the measurement data source and the server. It maintains a local copy of the data and can provide it directly when the server is inaccessible, thus preserving data accessibility while maintaining the simplicity of server-based management for normal operations.
3Reliability
If dual management of measurement data is implemented in the communication conversion device, then data loss is prevented, but device complexity increases
Solution Approach 1:
The patent extracts only the essential function of data storage and retrieval from the communication conversion device, rather than implementing full dual management capabilities. By storing data locally and providing retrieval through a failure flag mechanism, the device gains data security without the complexity of complete dual management systems.
Data Source
AI summary
The present invention provides a power storage device including a rack BMS that outputs measurement data and a failure flag of a battery rack including a plurality of battery cells, a communication conversion device that receives the measurement data and the failure flag from the rack BMS, subjects the measurement data to communication conversion, and outputs the measurement data, and a server that receives the measurement data from the communication conversion device, in which the communication conversion device stores the measurement data according to activation of the failure flag, and a method of operating the same.