Power Supply Apparatus with Segmented Grounding for Noise Isolation
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Solution Overview
Problem
Noise generated by AC/DC converters in power supply systems can cause malfunctions in control operations and pose a risk of electric shock due to floating capacitance in existing power storage systems.
Innovation Solution
The power supply apparatus includes a container and battery racks made of conductive materials, with the battery racks being insulated from the container and grounded externally, allowing independent grounding from the AC/DC converter, thereby preventing noise propagation and electric shock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery racks are connected to ground through the container, then grounding is provided, but noise from AC/DC converter propagates to electricity storage modules via ground
Solution Approach 1:
The grounding system is segmented into two independent paths: one for the container (with AC/DC converter) and another for the battery racks (with electricity storage modules). This segmentation prevents noise propagation from the AC/DC converter to the battery racks through the ground connection, while maintaining grounding for both components.
Solution Approach 2:
An insulating structure is introduced as an intermediary between the container and the battery racks. This insulator prevents direct electrical connection and noise transmission while allowing the battery racks to be grounded independently through separate grounding means, thus protecting control operations from noise interference.
2Reliability
If the container and battery racks are electrically connected, then grounding is provided, but electric shock risk occurs due to floating capacitance
Solution Approach 1:
The electrical connection between the container and battery racks is extracted/removed by introducing an insulating structure. This eliminates the floating capacitance issue that causes electric shock risk, while grounding safety is maintained through separate grounding connections for both the container and battery racks.
3Object-affected harmful factors
If insulating material is added between container and battery racks, then noise propagation is prevented, but device complexity increases
Solution Approach 1:
The insulating structure serves multiple functions simultaneously: it provides electrical insulation to prevent noise propagation, maintains physical spacing between components, and supports the battery racks. This multi-functionality reduces the need for additional separate components, thereby minimizing the increase in device complexity.
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
This configuration effectively prevents noise-induced malfunctions and electric shocks by isolating the battery racks from the AC/DC converter noise source and grounding them externally, ensuring reliable control operations and user safety.
Implementation Method 1
a grounding means configured to connect the battery racks to a ground outside the container
Implementation Method 2
insulate the container from the battery racks and connect the battery racks to a ground outside the container
Data Source
AI summary
A power supply apparatus includes a container including a first conductive material, a plurality of battery racks including a second conductive material, a plurality of electricity storage modules mounted on the battery racks and having grounded portions connected to the battery racks, and a grounding means configured to connect the battery racks to a ground outside the container.