Photovoltaic Module Delamination with Targeted Radiation
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Solution Overview
Problem
Delamination in photovoltaic module recycling is expensive and technically complicated due to the sandwich-like structure of the laminate, which requires precise separation of layers without damaging them.
Innovation Solution
Applying targeted radiation, such as microwaves or infrared, to the polymer encapsulant layers of the laminate to soften and separate them efficiently, combined with mechanical gripping and controlled thermal processes to manage the delamination without heating the entire laminate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional thermal delamination methods are used to separate layers of PV modules, then delamination can be achieved, but the process becomes expensive and technically complicated
Solution Approach 1:
The patent replaces conventional mechanical and thermal delamination systems with an electromagnetic radiation-based system. Radiation emitters emit specific wavelengths that are selectively absorbed by polymer materials in the laminate, causing localized heating and softening that facilitates layer separation without requiring complex mechanical pressing or large-scale thermal fields.
Solution Approach 2:
The invention changes the physical parameters of the delamination process by using electromagnetic radiation of specific wavelengths rather than conventional broad-spectrum heating. By selecting radiation wavelengths that match the absorption characteristics of the polymer encapsulant, the process achieves selective heating at lower temperatures, simplifying the overall procedure and reducing equipment complexity.
2Productivity
If full laminate heating is applied to separate layers, then delamination occurs, but energy consumption increases due to heating large thermal mass
Solution Approach 1:
The patent applies local quality by targeting specific polymer materials within the laminate for heating rather than heating the entire structure uniformly. Radiation emitters are positioned and configured to direct energy at encapsulant layers containing polymer materials, which have specific absorption characteristics for certain wavelengths. This localized heating approach softens only the necessary adhesive layers, dramatically reducing the thermal mass that must be heated and thereby lowering energy consumption while maintaining delamination effectiveness.
Solution Approach 2:
The invention uses partial action by applying radiation only to the polymer-containing encapsulant layers rather than heating the entire laminate structure. This selective heating of only the necessary portions (the adhesive layers) achieves delamination without the excessive energy expenditure required by conventional methods that heat glass, metal frames, and other non-polymer components.
3Use of energy by moving object
If targeted radiation is applied to polymer layers, then energy efficiency improves, but requires precise wavelength selection and targeting
Solution Approach 1:
The patent employs self-service by utilizing the inherent absorption characteristics of the polymer materials themselves to guide the heating process. The polymer encapsulant materials naturally absorb specific wavelengths of electromagnetic radiation, so the system leverages this property without requiring external guidance or complex control mechanisms. The materials essentially 'select' which radiation they absorb based on their molecular structure, reducing the need for precise external targeting while maintaining energy efficiency.
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 method allows for efficient delamination of photovoltaic modules with reduced energy consumption and minimal damage to the layers, facilitating cost-effective recycling by separating materials like silicon wafers and glass.
Implementation Method 1
By focusing upon absorption of the radiation by polymer(s), embodiments may allow for the applied radiation to be better used during the delamination process
Implementation Method 2
Radiation of one or more specific types—e.g., microwave (MW)
Implementation Method 3
Infrared (IR)
Implementation Method 4
By targeting polymer(s) of a laminate, radiation emitters (MW; IR; and/or other) may be energy efficient
Data Source
AI summary
Embodiments may perform delamination of a photovoltaic module through the application of radiation. Radiation of one or more specific types—e.g., microwave (MW); Infrared (IR); others—may be applied to one or more faces of the PV module. By targeting polymer(s) of a laminate, radiation emitters (MW; IR; and/or other) may be energy efficient, avoiding the need to heat up the full large thermal mass of an entire laminate. By focusing upon absorption of the radiation by polymer(s), embodiments may allow for the applied radiation to be better used during the delamination process.