Photovoltaic Cell Module Insulating Material Creepage Distance
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Solution Overview
Problem
The existing photovoltaic cell modules face issues where the insulating material securing the creepage distance detaches from the panel when subjected to loads like snow coverage or wind pressure, leading to insufficient creepage distance maintenance.
Innovation Solution
A photovoltaic cell module design where the insulating material is adhered to the panel covering the light receiving surface, side end surface, and back surface, with a frame member that allows spacing between the insulating material and the frame, preventing detachment even under bending loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the creepage distance is increased to improve safety, then the safety is improved, but the power generation efficiency per unit area decreases
Solution Approach 1:
The insulating material is extended from a two-dimensional planar configuration to a three-dimensional configuration that wraps around the peripheral end part, covering the light receiving surface, side end surface, and back surface. This spatial extension maintains adequate creepage distance while minimizing the impact on the light receiving area.
Solution Approach 2:
The insulating material is designed as a thin film that can flexibly conform to the panel's surface geometry, including curved and angled surfaces. This flexible thin film structure provides comprehensive insulation coverage without adding significant bulk or interfering with the photovoltaic cell's light absorption.
2Reliability
If the insulating material is adhered to the photovoltaic cell panel to secure creepage distance, then the creepage distance is maintained, but the insulating material detaches when the panel is subjected to loads like snow coverage or wind pressure
Solution Approach 1:
The insulating material is divided into multiple segments or layers, with each layer adhered to different surfaces (light receiving surface, side end surface, back surface). This segmentation distributes the adhesion stresses across multiple bonding interfaces, preventing detachment under load.
Solution Approach 2:
The insulating material is configured to wrap around the peripheral end part in three dimensions, creating multiple adhesion points and distribution of mechanical stresses. This multi-dimensional configuration enhances stability by distributing loads across different surfaces and orientations.
3Strength
If adhesive material is filled in the fitting groove to adhere the frame to the photovoltaic cell panel, then the frame and panel are adhered, but the insulating material becomes detached when the panel bends under load
Solution Approach 1:
The insulating material is extracted from the fitting groove area and positioned to cover the peripheral end part of the panel. This separation prevents the insulating material from being trapped between the frame and panel during bending, eliminating the detachment problem while maintaining adhesion strength through proper positioning.
Solution Approach 2:
The insulating material serves as an intermediary element that is adhered to the panel surface but deliberately kept separate from the frame's fitting groove. This intermediary positioning allows the frame and panel to adhere through the adhesive material in the fitting groove without compromising the insulating material's stability during panel bending.
Data Source
AI summary
A photovoltaic cell module includes a photovoltaic cell panel whose planar shape is a rectangular shape; an insulating material adhered to the photovoltaic cell panel, so as to cover the photovoltaic cell panel from an outer peripheral part on a light receiving surface side, via a side end surface, to an outer peripheral part on a back surface side; and a frame member configured to protect a periphery of the photovoltaic cell panel to which the insulating material is adhered, wherein among a first side and a second side of the photovoltaic cell panel facing each other, at least on the first side, the insulating material, which is adhered to the light receiving surface and the side end surface of the photovoltaic cell panel, and the frame member can be spaced apart from each other.