Bifacial Reflective Gap Film for Photovoltaic Cell Gap Light Recovery
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Solution Overview
Problem
Current bifacial photovoltaic modules face inefficiencies due to gaps between photovoltaic cells, which reduce sunlight utilization and output power.
Innovation Solution
A bifacial reflective gap film is introduced, featuring a back bonding layer, intermediate support layer, and reflective structures to reflect sunlight back to photovoltaic cells, enhancing sunlight utilization and output power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple photovoltaic cells are arranged side by side to form a photovoltaic module, then the module can be constructed with available cell sizes, but gaps between the cells reduce sunlight utilization and power generation efficiency
Solution Approach 1:
The patent converts the harmful effect of gaps between photovoltaic cells (which cause light loss and reduced efficiency) into a beneficial reflective structure. By placing reflective materials in the gaps, the previously wasted light is now redirected onto the photovoltaic cells, transforming the gap from a source of energy loss into an element that enhances light utilization and power generation.
2Productivity
If reflective materials are added to fill gaps between photovoltaic cells, then sunlight utilization improves, but the structural reliability and stability of the module may be compromised
Solution Approach 1:
The patent employs composite material structures in the gap-filling reflective elements, combining reflective materials with bonding and support layers. This multi-layer composite design ensures that the reflective function is achieved while maintaining structural integrity, mechanical strength, and long-term stability of the photovoltaic module.
3Productivity
If complex multi-layer structures are used in the reflective gap film, then optical performance improves, but manufacturing complexity and costs increase
Solution Approach 1:
The reflective gap film is segmented into distinct functional layers (bonding layer, support layer, reflective layer) that can be manufactured and assembled separately. This segmentation allows for optimized optical performance in each layer while simplifying the overall manufacturing process, as each layer can be produced using standard techniques and then integrated into the final structure.
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 bifacial reflective gap film improves sunlight utilization and output power by 0.2% to 3%, while ensuring module reliability and reducing material costs.
Implementation Method 1
A bifacial reflective gap film is introduced, featuring a back bonding layer, intermediate support layer, and reflective structures to reflect sunlight back to photovoltaic cells
Data Source
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AI summary
The present disclosure provides a bifacial reflective gap film, including: a back bonding layer, an intermediate support layer, a front reflective structure, and a back reflective structure. The front reflective structure is disposed on one side of the intermediate support layer and includes a plurality of inverted V-shaped toothed members arranged side by side, and the front reflective structure is coated with a front reflective layer, the back reflective structure is disposed on the other side of the intermediate support layer, and the back bonding layer has a thickness not less than a height of the back reflective structure so that the back reflective structure is completely located in the back bonding layer. The present disclosure further provides a bifacial photovoltaic module with the bifacial reflective gap film.