Modular Power Supply Coupling for Flexible AC/DC Output
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Solution Overview
Problem
Existing portable emergency power supplies are limited to emergency use scenarios and not utilized during normal times, lacking versatility in power conversion and control.
Innovation Solution
A power supply system with a coupling device and detachable power supply units, featuring a power conversion device that converts DC to AC and includes a controller for managing power output based on communication information, enabling flexible use in both emergency and normal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the power supply unit is designed for emergency use only with DC charging interface, then it can provide emergency power supply function, but it cannot be used during normal times and usage scenarios are limited
Solution Approach 1:
The power supply unit is designed with dual functionality: it can operate as an emergency power supply during outages and as a normal power supply during regular operation. The unit includes both DC output interface for emergency use and AC output interface through integrated converter for normal use, enabling it to serve multiple purposes across different operational contexts.
Solution Approach 2:
The power supply unit incorporates a controller that dynamically adjusts its operational mode based on grid status. When the power grid is available, the unit operates in normal mode providing AC power; when the grid fails, it automatically switches to emergency mode providing DC power, thus adapting to changing conditions and expanding usage scenarios.
2Adaptability or versatility
If the power supply unit includes both distributed power supply and individual converter, then it can output both DC and AC power for flexible use, but the device complexity increases
Solution Approach 1:
The patent combines the distributed power supply function and individual converter function into a single integrated power supply unit. The converter is built into the power supply unit, merging multiple functions (DC generation, AC conversion, power management) into one device, thereby providing both DC and AC output capabilities while managing complexity through integration rather than separate components.
Solution Approach 2:
The power supply system is segmented into modular components: the power supply unit with distributed power supply and the separate power conversion device. This segmentation allows the power supply unit to maintain simplicity while the power conversion device handles the complex DC-to-AC conversion, distributing complexity across system components rather than concentrating it in one unit.
3Adaptability or versatility
If the power conversion device converts DC power to AC power, then it enables AC power output for normal time use, but conversion loss occurs
Solution Approach 1:
The system dynamically selects the appropriate power output mode based on grid availability. During normal operation when the grid is available, the unit converts DC to AC power through the power conversion device. During emergencies when the grid fails, it directly outputs DC power without conversion, thereby minimizing conversion loss by only performing DC-to-AC conversion when necessary for grid compatibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Expands usage scenarios by allowing the power supply units to be used both in emergency situations and during normal times, reducing conversion loss and enhancing operational flexibility.
Implementation Method 1
a converter configured to convert the direct current power output from the distributed power supply to alternating current power
Data Source
AI summary
A power supply system includes a coupling device including a power conversion device, and one or more power supply units. Each of the power supply units includes a distributed power supply, a first interface outputting DC power to the power conversion device, an individual converter converting the DC power to AC power, and a second interface outputting the AC power output from the individual converter. The power conversion device includes a coupling side converter that converts the direct current power output from the power supply units to AC power, and an interface for outputting the AC power output from the coupling side converter. The power supply system includes a controller for controlling at least one of a corresponding one of the power supply units or the power conversion device based on communication information obtained by communication between the corresponding one of the power supply units or the power conversion device.