Battery Backup Unit Shutdown Bus for Parallel Redundancy
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Solution Overview
Problem
Current methods for synchronous shutdown of parallel battery backup units in data center power distribution systems suffer from interference and delay due to digital signals, failing to meet the requirements for simultaneous and rapid shutdown under redundancy conditions.
Innovation Solution
A backup power supply system with multiple battery backup units connected by a communication bus, sharing discharge states, and equipped with synchronous shutdown circuits, where output terminals of these circuits are connected by a signal bus, allowing for synchronous shutdown via a shutdown level signal when the number of stopping units exceeds the number of redundant power supplies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If digital communication signals are used for synchronous shutdown control of parallel battery backup units, then system complexity is reduced and communication is established, but signal interference and delay occur, failing to achieve simultaneous rapid shutdown
Solution Approach 1:
The patent replaces the digital communication system (electromagnetic signal transmission) with an analog electrical connection system (metal wire/bus bar connection). This substitution eliminates signal interference and delay by using direct electrical connection instead of digital communication protocols, achieving reliable synchronous shutdown control.
Solution Approach 2:
The patent introduces a dedicated synchronous shutdown signal bus as an intermediary transmission medium. This specialized bus is designed solely for transmitting shutdown signals, isolating it from other communication interference and ensuring reliable, interference-free signal transmission between battery backup units.
2Loss of information
If digital communication protocols are used for shutdown signaling, then data frames with identification are achieved, but signal delay and interference prevent simultaneous shutdown
Solution Approach 1:
The patent replaces digital communication protocols with direct analog electrical connection. The shutdown signal is transmitted instantly through metal conductors without the processing delays, packetization, and protocol overhead inherent in digital communication, achieving both signal accuracy and rapid response.
Solution Approach 2:
The patent maintains continuous electrical connection between battery backup units for shutdown signaling. This continuous physical connection allows instantaneous signal propagation without the intermittent nature of digital communication cycles, ensuring no time loss in signal transmission.
3Reliability
If parallel battery backup units operate with redundancy (2N or N+1), then system reliability is improved, but synchronous shutdown control becomes more complex and difficult to coordinate
Solution Approach 1:
The patent merges the shutdown control functions of all parallel battery backup units into a unified system through the common synchronous shutdown signal bus. Instead of independent control for each unit, all units respond to the same physical signal, simplifying the control architecture while maintaining redundancy.
Solution Approach 2:
The synchronous shutdown signal bus serves multiple battery backup units simultaneously with a single signal transmission path. This universal communication medium allows one signal source to control multiple redundant units, reducing control complexity while maintaining system reliability.
Data Source
AI summary
Provided are a backup power supply system and a synchronous shutdown method. At least one of multiple battery backup units serves as a redundant power supply. The battery backup units are connected by a communication bus. The battery backup units share a discharge state through the communication bus. Each battery backup unit includes a synchronous shutdown circuit. Output terminals of synchronous shutdown circuits of the battery backup units are connected by a signal bus. When the number of battery backup units whose discharge states are stopping discharging is greater than the number of redundant power supplies, the output terminal of the synchronous shutdown circuit of any battery backup unit outputs a shutdown level signal, and each synchronous shutdown circuit controls all of the battery backup units to shut down synchronously in response to the shutdown level signal.