Solar Battery Module Spacing and Reflection Optimization

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Solution Overview

Problem

Solar cell modules face challenges in achieving uniform short-circuit current values across multiple solar cells due to variations in spacing dimensions, leading to inefficiencies in light distribution and energy output.

Innovation Solution

The solar cell module design incorporates specific spacing dimensions between strings and solar cells, utilizing olefin-based resins and reflection members to optimize light reflection and distribution, ensuring that the spacing dimensions A, B, and C satisfy the relation {(995A−20C)/1005}<B<{(1005A+20C)/995}, which reduces differences in short-circuit current values.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If solar cells are arranged with standard spacing dimensions in a solar cell module, then the module structure is simple and easy to manufacture, but the short-circuit current values become non-uniform across different solar cells

Engineering Contradiction:

Improveuniformity of short-circuit current valuesVSAvoidspacing dimension control requirements

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by establishing specific mathematical relationships between spacing dimensions A, B, and C. The formula {(995A−20C)/1005}<B<{(1005A+20C)/995} transforms the spacing parameters to ensure uniform light distribution and uniform short-circuit current values across all solar cells in the module.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces complex mechanical adjustment systems with a predetermined spacing dimension formula. Instead of using adjustable mechanisms to achieve uniform current values, the invention uses fixed spacing dimensions calculated through the mathematical relationship, simplifying the manufacturing process while ensuring precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If spacing dimensions are adjusted to achieve uniform short-circuit current values, then light distribution improves, but manufacturing complexity increases

Engineering Contradiction:

Improveenergy output efficiencyVSAvoidspacing dimension precision control

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent changes the spacing dimension parameters A, B, and C according to the formula {(995A−20C)/1005}<B<{(1005A+20C)/995}, which optimizes light distribution and maximizes energy output efficiency while providing clear manufacturing guidelines.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent performs preliminary calculation and determination of spacing dimensions before manufacturing. By pre-establishing the mathematical relationship between A, B, and C, the manufacturing process is guided with clear target values, reducing the difficulty of achieving precision during production.

Inventive Principle:

Principle #10Preliminary action

3Use of energy by moving object

If reflection members are added to optimize light reflection, then light utilization improves, but device complexity and manufacturing cost increase

Engineering Contradiction:

Improvelight utilization efficiencyVSAvoidmodule structure complexity

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The patent applies local quality by placing reflection members specifically in the spacing regions between adjacent solar cells. This localized approach optimizes light reflection and utilization efficiency in the most critical areas without adding unnecessary complexity to the entire module structure.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The reflection members act as intermediaries in the spacing regions between solar cells, mediating the light path to reflect incident light back onto the solar cell surfaces. This intermediary element enhances light utilization without requiring fundamental changes to the solar cell structure itself.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 configuration ensures a uniform short-circuit current value among solar cells, enhancing energy output and efficiency by maintaining a predetermined range of spacing differences, thereby optimizing light utilization and energy production.

Implementation Method 1

there are provided, between the adjacent solar cells, reflection members reflecting the incident light and again making the reflected light incident on the light receiving surface of the solar cells

Methodology Applied

Scientific EffectLight reflection: Reflection

Data Source

PatentUS9882525B2Solar battery module

Publication Date: 2018.01.30 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

Provided is a solar battery module having an outer edge maintained by a frame, and comprising a group of strings formed by using a plurality of solar battery cells, connecting adjacent solar battery cells in a longitudinal direction by an inter-cell wiring material to form a plurality of strings, and arranging the plurality of strings in a transverse direction, wherein a spacing distance A between the interior of the frame and the frame-side edge of solar battery cells of the outermost string in the group of strings, a spacing distance B between solar battery cells constituting adjacent strings in the group of strings, and a spacing distance C between the solar battery cells in the transverse direction satisfy the relationship {(995A−20C)/1005}<B<{(1005A+20C)/995}. Additionally, an olefinic resin is used in a first sealing member on the light receiving surface side.