Solar Cell Module Back-Surface Electrode Connection
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Solution Overview
Problem
Conventional solar cell modules face challenges in efficiently collecting carriers from the back surface where n-side and p-side collectors are formed, leading to reduced efficiency.
Innovation Solution
A solar cell module design that includes connection members with conductive regions electrically connected to n-side and p-side electrodes, allowing for efficient carrier collection across the entire length of the solar cells, utilizing adhesion layers with conductivity perpendicular to the surface and insulation parallel to it, and integrating these regions to prevent short-circuiting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If n-side collectors and p-side collectors are formed on the back surface of the photoelectric conversion part, then electrical connection between adjacent solar cells is achieved, but carrier collection efficiency is reduced
Solution Approach 1:
The patent transitions from conventional front-surface electrode arrangement to back-surface electrode formation, utilizing the back surface dimension for both electrical connection and carrier collection. The n-side and p-side electrodes are formed on the back surface in a direction orthogonal to the arranging direction, enabling simultaneous achievement of electrical connection and improved carrier collection without the trade-off present in conventional designs.
2Productivity
If n-side electrodes and p-side electrodes are formed on the back surface in the arranging direction, then carrier collection is improved, but short-circuiting between electrodes may occur
Solution Approach 1:
The patent applies different properties to different regions: insulating regions are formed between the n-side and p-side electrodes on the back surface, creating local electrical insulation where needed. This allows the electrodes to extend in the arranging direction for improved carrier collection while preventing short-circuiting through localized insulating barriers between adjacent electrodes.
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 enhances carrier collection efficiency by ensuring continuous electrical connection of n-side and p-side electrodes over the entire solar cell length, improving overall module performance.
Implementation Method 1
adhesion layers with conductivity perpendicular to the surface and insulation parallel to it
Implementation Method 2
adhesion layers with conductivity perpendicular to the surface and insulation parallel to it
Implementation Method 3
solar cell having n-side electrodes and p-side electrodes formed on a back surface of a photoelectric conversion part
Data Source
AI summary
A first surface of a first section of a connection member includes a first conductive region, and a second surface of a second section of the connection member includes a second conductive region. The first conductive region is formed along an n-side electrode included in one solar cell, and is electrically connected to the n-side electrode. The second conductive region is formed along a p-side electrode included in a different solar cell, and is electrically connected to the p-side electrode. The first conductive region and the second conductive region are electrically connected to each other.