Solar Cell Module Edge Sealing for Moisture and Contamination Control
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Solution Overview
Problem
The existing solar cell module structures with metal foil tape seals are prone to adhesive exposure on the light receiving surface, leading to contamination by dirt and dust, which reduces power generation efficiency and weather resistance.
Innovation Solution
A solar cell module design featuring a first coating member with moisture resistance covering the peripheral edge, and a second coating member that completely covers the ends of the first coating member, with recesses filled with adhesive for enhanced protection and adhesion, preventing moisture and foreign matter ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal foil tape with adhesive is used to seal the peripheral edge, then moisture resistance is improved, but adhesive exposure on the light receiving surface occurs leading to contamination and reduced power generation efficiency
Solution Approach 1:
The patent applies the nesting principle by placing the second coating member (resin gasket) over the first coating member (metal foil tape) at the peripheral edge. This nested structure allows the adhesive of the first coating member to be hidden within the recess of the second coating member, preventing adhesive exposure and contamination while maintaining the moisture resistance provided by the metal foil tape seal.
Solution Approach 2:
The second coating member (resin gasket) acts as an intermediary element that mediates between the first coating member (metal foil tape) and the external environment. It covers the adhesive portion of the first coating member, preventing direct contact with foreign matters while allowing the first coating member to maintain its moisture sealing function.
2Reliability
If metal foil tape with adhesive is used to seal the peripheral edge, then weather resistance is improved, but contamination by foreign matters expands towards the center reducing reliability
Solution Approach 1:
The nested structure of the second coating member covering the first coating member creates a protective barrier that prevents foreign matters from reaching the adhesive and migrating toward the center of the solar cell module, thus eliminating the contamination pathway while preserving weather resistance.
Solution Approach 2:
The patent converts the potential harm of exposed adhesive (which attracts contamination) into a benefit by designing the second coating member with a recess that specifically accommodates the adhesive. This design transformation turns the adhesive from a contamination source into a sealed component within the protective structure.
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
The design provides improved weather resistance and power generation efficiency by preventing moisture and contamination, ensuring the solar cell module's longevity and performance.
Implementation Method 1
a first coating member (22) having moisture resistance that is stuck to the solar cell panel (10) with adhesive
Implementation Method 2
a second coating member (32) covering at least an end of the first coating member (22) on the front surface protective member (14) side
Data Source
AI summary
There is provided a solar cell module with good weather resistance (moisture resistance) and power generation efficiency.A solar cell module 1 comprises a solar cell panel 10 configured to include a solar cell element 12 and a front surface protective member 14 disposed on a light receiving surface side of the solar cell element 12; a first coating member 22 having moisture resistance that is stuck to the solar cell panel 10 with adhesive such that at least a surface S1 of the front surface protective member 14 and a side end surface S3 of the solar cell panel 10 are covered continuously at a peripheral edge of the solar cell panel 10; and a second coating member 32 covering at least an end A1 of the first coating member 22 on the front surface protective member 14 side while being in contact with the surface S1 of the front surface protective member 14.