Solar Cell Module Adhesive Side Surface Extension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The expansion and contraction of wiring members in solar cell modules lead to reduced adhesion between the wiring members and solar cells, increasing connection resistance and degrading the characteristics of the solar cells.
Innovation Solution
A solar cell module design that incorporates a resin adhesive with first and second adhesive portions, where the first adhesive portion extends from the main surface to the side surface of the wiring member, and the second portion is between the solar cell and the wiring member, forming a pooling portion that enhances adhesion and reduces resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a wiring member is connected to a solar cell using a resin adhesive, then expansion and contraction of the wiring member during connection can be reduced, but adhesion between the wiring member and solar cell decreases due to repeated expansion and contraction in normal usage, increasing connection resistance
Solution Approach 1:
The adhesive is extended from a two-dimensional planar configuration to a three-dimensional structure by forming it along the side surface of the wiring member. This vertical extension into the third dimension increases the adhesive contact area and provides a more robust connection that can withstand repeated expansion and contraction cycles, thereby maintaining low connection resistance while preserving adhesion strength.
Solution Approach 2:
The adhesive structure combines multiple functional regions: a first adhesive portion formed from the main surface to the side surface of the wiring member, and a second adhesive portion between the solar cell and wiring member. This composite adhesive configuration integrates both mechanical anchoring and electrical conductivity functions, resolving the contradiction between maintaining adhesion and preventing resistance increase.
2Device complexity
If the adhesive is formed only between the main surface and wiring member, then the structure is simple, but adhesion strength is insufficient to withstand repeated expansion and contraction
Solution Approach 1:
The adhesive structure transitions from a simple planar layer to a three-dimensional form by extending along the side surface of the wiring member. This dimensional extension creates a pooling portion that mechanically anchors the wiring member more effectively, significantly enhancing adhesion strength while adding only moderate structural complexity.
Solution Approach 2:
The adhesive is divided into functionally distinct portions: a first adhesive portion that extends from the main surface to the side surface, and a second adhesive portion between the solar cell and wiring member. This segmentation allows each portion to perform its specific function optimally, achieving high adhesion strength through coordinated action of multiple adhesive regions.
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 design effectively suppresses the degradation of solar cell characteristics by increasing adhesive strength and reducing the transmission of elasticity from the wiring member to the solar cell, thereby maintaining adhesion and improving the module's performance.
Implementation Method 1
a wiring member connected to a main surface of the solar cell by an adhesive
Implementation Method 2
the adhesive includes a first adhesive portion formed from the main surface to a side surface of the wiring member
Data Source
AI summary
Provided is a solar cell module (100) wherein an adhesive (30) has a first adhesive portion (30A) which is formed from the light receiving surface of a solar cell (10) to the side surface (20S) of a wiring material (20).