Solar Battery Module Light Diffusion Section Invalid Region

Solution Overview

Problem

Conventional solar cells face challenges in inexpensively forming collecting electrodes with tilting surfaces during manufacturing, which limits the effective use of light incident on invalid regions.

Innovation Solution

A solar battery module design featuring plate-like solar cells sandwiched between a light-permeable sheet and a back sheet, with a light diffusion section made of white or high-reflectance material in the invalid region to diffuse and reflect incident light, improving output characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If a collecting electrode with a tilting surface is formed to reflect incident light toward the light receiving surface, then light utilization in invalid regions is improved, but manufacturing complexity and cost increase

Engineering Contradiction:

Improvelight utilization efficiencyVSAvoidmanufacturing process complexity

Core Design Contradiction:

Loss of energyVSEase of manufacture

Solution Approach 1:

The patent replaces the expensive and complex tilting surface collecting electrode with a simple white reflecting sheet that can be easily manufactured and applied. This disposable-like approach uses inexpensive materials (white paint or adhesive sheet) to achieve the light reflection function without requiring complex electrode fabrication processes.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The invention changes the approach from forming a three-dimensional tilting surface structure to applying a two-dimensional white reflecting layer. This parameter change simplifies the manufacturing process while maintaining the light reflection function, transforming a complex structural solution into a simple material application solution.

Inventive Principle:

Principle #35Parameter changes

2Loss of energy

If a collecting electrode with a tilting surface is formed to reflect incident light toward the light receiving surface, then light utilization in invalid regions is improved, but manufacturing cost increases

Engineering Contradiction:

Improvelight utilization efficiencyVSAvoidmanufacturing cost

Core Design Contradiction:

Loss of energyVSEase of manufacture

Solution Approach 1:

The patent replaces the expensive and complex tilting surface collecting electrode with a simple white reflecting sheet that can be easily manufactured and applied. This disposable-like approach uses inexpensive materials (white paint or adhesive sheet) to achieve the light reflection function without requiring complex electrode fabrication processes.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

Instead of forming an actual three-dimensional tilting surface structure, the invention uses a two-dimensional white reflecting layer that optically replicates the light reflection function. This copying approach achieves the desired optical effect without the high manufacturing costs associated with creating physical tilting surfaces.

Inventive Principle:

Principle #26Copying

3Productivity

If the entire solar cell surface is made active for light reception, then energy generation efficiency is improved, but the structural integrity and electrode functionality are compromised

Engineering Contradiction:

Improveenergy generation efficiencyVSAvoidstructural integrity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies different functional qualities to different regions: the central region maintains the standard solar cell structure with collecting electrodes for electrical function, while the peripheral invalid region is treated with a white reflecting layer to enhance light utilization. This local differentiation allows both structural integrity and improved energy generation.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The invention converts the previously wasted light incident on invalid regions (a harmful loss) into useful reflected light that can be redirected to active regions. By applying the white reflecting layer to peripheral areas, the patent transforms what was previously a structural necessity (invalid regions) into a beneficial light management feature.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 arrangement of a light diffusion section in the invalid region enhances light utilization, improving the output characteristics of the solar cell by reflecting and diffusing light, thereby increasing energy generation efficiency.

Implementation Method 1

a light diffusion section for diffusely reflecting a light or a light diffusion section of a white color is arranged in an invalid region of each solar cell

Methodology Applied

Scientific EffectDiffuse reflection: Reflection

Data Source

PatentUS8063299B2Solar battery module

Publication Date: 2011.11.22 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

It is an object of the present invention to easily and inexpensively provide a structure of effectively utilizing a light incident on an invalid area of a solar cell. Moreover, it is another object to improve output characteristics of the solar cell by effectively utilizing the light. The gist of the present invention resides in a solar battery module in which plate-like solar cells are held between a light penetrable sheet member on a light receiving surface side and a sheet member on a back surface side, and internal apertures are filled with a sealing resin, wherein a light diffusion section for diffusely reflecting a light or a light diffusion section of a white color is arranged in an invalid region of each solar cell.