Power Supply Device with Dynamic Load Segmentation
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Solution Overview
Problem
Power storage devices face reduced operational profit and increased energy loss due to low power conversion efficiency when energy consumption is lower than designed capacity, and they struggle to continuously supply energy to loads under varying grid conditions.
Innovation Solution
A power supply device with an energy storage unit, switch units, and load connection units that disconnect from the grid power source during predetermined conditions (like voltage sags or interruptions) to supply energy from storage, ensuring continuous power to main loads and minimizing energy loss by optimizing energy usage based on price fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the power storage device operates under low load factor conditions, then the operational profit decreases, but the device continues to consume energy
Solution Approach 1:
The patent implements dynamic load management by switching between different load connection units (first and second load connection units) based on real-time conditions. The control unit dynamically connects or disconnects loads from the power storage device, allowing the system to adapt its operating mode between full-load operation (for profit optimization) and partial-load operation (for continuous energy supply), thereby resolving the contradiction between maintaining operational profit and preventing energy waste during low-demand periods
Solution Approach 2:
The system changes operational parameters by adjusting the load factor through selective connection of different load units. When energy prices are favorable, the system operates at higher load factors to maximize profit. When prices are unfavorable or during off-peak periods, it reduces the load factor while maintaining essential operations, thus optimizing the balance between profitability and energy consumption
2Reliability
If the power storage device is designed for high capacity, then it can supply energy during grid failures, but power conversion efficiency decreases under low load conditions
Solution Approach 1:
The patent divides the load into multiple segments (first load connection unit and second load connection unit) that can be independently controlled. This segmentation allows the power storage device to supply energy to critical loads during grid failures while keeping non-critical loads disconnected, thereby maintaining reliability for essential operations while avoiding the efficiency penalty of running at very low load factors across the entire system capacity
Solution Approach 2:
The system employs partial action by connecting only the necessary portion of the load to the power storage device during grid failures rather than operating at full capacity. The control unit selectively activates load connection units based on the severity and duration of grid failures, ensuring continuous supply to critical loads while minimizing energy conversion losses by avoiding operation at excessively low load factors
3Reliability
If the device supplies energy to all loads continuously, then all loads receive power, but energy loss increases due to low load factor operation
Solution Approach 1:
The patent applies local quality by differentiating between critical loads (first load connection unit) and non-critical loads (second load connection unit). During grid failures, the system ensures continuous power supply to critical loads while disconnecting or reducing power to non-critical loads. This localized differentiation maintains essential reliability while minimizing overall energy conversion losses by avoiding low-load operation across the entire system
Data Source
AI summary
Various embodiments provide power supply devices. According to an embodiment of the present disclosure, a power supply device includes: an energy storage unit configured to receive electrical energy from a first power source and store the electrical energy; a first switch unit configured to break electrical connection between the first power source and the energy storage unit when the first power source satisfies a predetermined condition; a first load connection unit electrically connected to the energy storage unit; a second load connection unit electrically connected to the energy storage unit; and a second switch unit configured to break electrical connection between the energy storage unit and the second load connection unit when the first power source satisfies the predetermined condition.