Solar Cell Module Segmentation for Strength and Filling Rate
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Solution Overview
Problem
Solar cell modules installed in limited spaces, such as replacing house tiles, have limited design flexibility and require high strength to withstand snow and wind loads while maximizing the filling rate of solar cell elements for efficient power generation.
Innovation Solution
A solar cell module design with a high-strength structure that includes a light-transmitting member, sealing materials, and a protective layer, where solar cell strings are connected with inner leads to increase the filling rate of solar cell elements and enhance structural integrity, allowing for efficient power generation and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If solar cell modules are installed in limited spaces to replace house tiles, then the design flexibility is reduced, but the structural strength must be increased to withstand snow and wind loads
Solution Approach 1:
The solar cell module is divided into multiple solar cell strings arranged in a specific pattern, with each string containing multiple solar cell elements connected by inner leads. This segmentation allows the module to maintain structural integrity while adapting to limited installation spaces.
Solution Approach 2:
The patent arranges solar cell strings in a multi-dimensional configuration within the module, optimizing the spatial arrangement to maximize power generation capacity while maintaining structural strength for withstanding external loads like snow and wind.
2Productivity
If the filling rate of solar cell elements is increased to maximize power generation, then the structural strength may be compromised, but high strength is needed to withstand external forces
Solution Approach 1:
The patent employs different sealing materials with varying properties at different locations within the module. The light-receiving-surface-side sealing material and non-light-receiving-surface-side sealing material have different characteristics optimized for their respective positions, allowing high filling rate while maintaining structural strength.
Solution Approach 2:
The module uses composite sealing structures combining light-receiving-surface-side sealing material and non-light-receiving-surface-side sealing material, which work together to provide both structural support and protection, enabling high solar cell element density without compromising strength.
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 increases the power generation capacity and structural strength of the solar cell module, enabling it to withstand external forces and optimize the use of limited space with enhanced flexibility and reliability.
Implementation Method 1
a light-transmitting member 13, a light-receiving-surface-side sealing material 14a, a plurality of solar cell strings 16
Implementation Method 2
solar cell elements 201 connected in series by inner leads 17 in one solar cell string 16
Data Source
Figure 1A~1D
Figure 2A~2B
Figure 3A~3B
AI summary
Provided is a solar cell module having an increased strength while having an increased ratio of an area of solar cell elements to an area of the solar cell module. The solar cell module comprises: a solar cell string including a plurality of solar cell elements, each including a first main surface being rectangular in shape and a first bus bar electrode extending along a long side direction on the first main surface, and an interconnection material that connects the solar cell elements adjacent to each other along the long side direction of the first main surface; a light-transmitting member being rectangular in shape that is located to be substantially parallel to the first main surface so as to cover the solar cell string; and a sealing material located between the solar cell string and the light-transmitting member. Each of the plurality of solar cell elements includes a silicon substrate including the first main surface, a second main surface located on the back side of the first main surface, a first side surface connecting the first main surface and the second main surface, and a second side surface that is located on the back side of the first side surface and connects the first main surface and the second main surface. The first side surface and the second side surface are arranged along the long side direction of the first main surface, where silicon is exposed on the first side surface and the second side surface is covered with an insulating layer.