Solar Cell Panel Wiring Layout for Lamination Edge Protection
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Solution Overview
Problem
Solar cell panels with glass substrates face issues of damage or disconnection of wiring members due to pressure during the lamination process, especially at the edges where sealing members are thinner, leading to reliability concerns over time.
Innovation Solution
A solar cell panel design featuring wiring members with different widths, where a second wiring member with a smaller width is positioned closer to the edges, and a thicker sealing member is used, both made of glass substrates, to prevent damage and disconnection, while maintaining a simple manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass substrates are used for both outer surfaces of the solar cell panel, then the panel can be safely protected even when exposed to an external environment for a long period of time, but the thickness of the sealing members at the edges is reduced by the weight of the cover member during the lamination process, leading to damage or disconnection of wiring members
Solution Approach 1:
The patent applies different wiring member widths at different locations: a first wiring member with a first width is used in the center region, while a second wiring member with a second width (smaller than the first width) is used at the edge regions. This local differentiation allows the edge wiring members to better accommodate the reduced sealing member thickness at the edges, preventing damage while maintaining overall panel protection.
Solution Approach 2:
The patent changes the width parameter of the wiring members based on their position. By reducing the width of wiring members at the edges where sealing member thickness is reduced, the patent prevents the wiring members from protruding through the sealing members and causing damage, while maintaining sufficient width at the center for optimal electrical connection.
2Reliability
If a larger pressure is provided during the lamination process, then the panel can be safely protected, but the thickness of the sealing members at the edges is further reduced, causing more serious damage or disconnection of wiring members
Solution Approach 1:
The patent implements local quality by using a second wiring member with a smaller width specifically at the edge regions where the harmful effect of reduced sealing member thickness is most pronounced. This localized adaptation prevents wiring member damage at the edges while allowing larger pressure to be applied for overall panel protection.
3Reliability
If the thickness of the ribbon or interconnector is relatively large in comparison with the width, then the electrical connection is improved, but the wiring members are more susceptible to damage or disconnection at the edges where sealing members are thinner
Solution Approach 1:
The patent applies local quality by differentiating wiring member dimensions based on position: the first wiring member in the center maintains sufficient thickness for optimal electrical connection, while the second wiring member at the edges uses a reduced width to accommodate the thinner sealing members, preventing damage while maintaining adequate electrical connection at both locations.
Data Source
AI summary
A solar cell panel according to the present embodiment includes a solar cell string including a plurality of solar cells and a plurality of wiring members connecting the plurality of solar cells in first direction, a sealing member sealing the solar cell string, a first cover member positioned on one surface of the solar cell string on the sealing member and a second cover member positioned on other surface of the solar cell string on the sealing member, wherein the plurality of wiring members positioned in at least one of the plurality of solar cells include, a first wiring member having a first width, and a second wiring member having a second width less than the first width and positioned outer to the first wiring member.