Solar Module Encapsulant With Open UV Transmission Against Polarization

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Solution Overview

Problem

Solar cells are prone to polarization in the field, leading to reduced output power, and existing solutions do not effectively address this issue at the module level without compromising the electrical configuration or requiring changes to the solar cells.

Innovation Solution

A solar cell module design incorporating an encapsulant with a wide UV transmission curve and high volume specific resistance, which forms a protective package with a transparent cover, preventing polarization by allowing more UV light to pass through while maintaining electrical isolation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional encapsulants are used to protect solar cells, then protection and electrical isolation are achieved, but UV transmission is blocked causing solar cell polarization and reduced output power

Engineering Contradiction:

Improveprotection and electrical isolationVSAvoidoutput power

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent changes the optical parameters of the encapsulant by using materials with specific UV transmission characteristics. The encapsulant is designed to have a UV transmission curve that allows UV light to pass through while maintaining electrical isolation properties, thereby preventing polarization without sacrificing protection.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite material structures where the encapsulant combines multiple properties: UV transparency, electrical insulation, and protective functions. This composite approach allows the material to simultaneously enable UV transmission for polarization prevention while maintaining the necessary protection and electrical isolation.

Inventive Principle:

Principle #40Composite materials

2Productivity

If UV light transmission is increased to prevent polarization, then solar cell output power is maintained, but electrical isolation and protection are compromised

Engineering Contradiction:

Improveoutput powerVSAvoidelectrical isolation and protection

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent modifies the optical and electrical parameters of the encapsulant material. By selecting materials with specific UV transmission characteristics and appropriate electrical resistance properties, the encapsulant achieves UV transparency for polarization prevention while maintaining electrical isolation and protective functions.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The encapsulant is designed as a composite material system that integrates UV transparency, electrical insulation, and mechanical protection properties. This allows the material to transmit UV light effectively while maintaining the necessary electrical isolation and protective characteristics.

Inventive Principle:

Principle #40Composite materials

3Duration of action of stationary object

If solar cells are protected from environmental conditions, then durability is improved, but polarization occurs reducing long-term performance

Engineering Contradiction:

ImprovedurabilityVSAvoidlong-term output power

Core Design Contradiction:

Duration of action of stationary objectVSProductivity

Solution Approach 1:

The patent changes the optical parameters of the protective encapsulant to allow UV transmission. This modification enables the encapsulant to provide environmental protection while preventing UV-induced polarization, thereby maintaining both durability and long-term output power performance.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The encapsulant uses composite material properties combining environmental protection, UV transparency, and electrical isolation. This composite structure allows the solar cell module to withstand environmental conditions while preventing polarization-related performance degradation over time.

Inventive Principle:

Principle #40Composite materials

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 encapsulant with a wide UV transmission curve and high resistance effectively prevents solar cell polarization, enabling faster recovery and maintaining energy output without altering the solar cell configuration.

Implementation Method 1

the encapsulant has a relatively wide UV transmission curve

Methodology Applied

Scientific EffectUV transmission: Absorption (EM radiation)

Data Source

PatentUS20260059868A1Module level solution to solar cell polarization using an encapsulant with opened UV transmission curve

Publication Date: 2026.02.26 MAXEON SOLAR PTE LTD

AI summary

A solar cell module includes interconnected solar cells, a transparent cover over the front sides of the solar cells, and a backsheet on the backside of the solar cells. An encapsulant protectively packages the solar cells. The encapsulant and the transparent cover forms a top protection package that has a combined UV transmission curve and volume specific resistance that addresses polarization. The encapsulant has a relatively wide UV transmission curve.