Composite Station for Drilling and Fixing Conductive Backsheets
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Solution Overview
Problem
Current assembly processes for photovoltaic panels with back-contact cells face challenges such as low automation, high manual errors, complex and costly automation systems, difficulty in precise positioning of flexible encapsulating layers, lack of efficient systems for producing conductive backsheets with integrated encapsulating and dielectric layers, and inefficiencies in applying insulating dielectric masks using silkscreen printing.
Innovation Solution
A composite automated operating station that simultaneously performs cyclic processes for drilling and fixing an integrated encapsulating and dielectric layer on conductive backsheets, using a multifunction cylindrical roller for precise positioning and laser drilling, eliminating the need for silkscreen printing and enabling flexible hole configurations, and offering a cost-effective, high-quality solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operations are used in assembly processes, then flexibility and simplicity are maintained, but error rate increases and quality decreases
Solution Approach 1:
The system uses vision systems and automated feedback mechanisms to guide the assembly process, enabling the machine to self-correct and self-verify positioning accuracy, thereby maintaining simplicity while reducing errors
Solution Approach 2:
Manual mechanical positioning is replaced with automated vision-guided positioning systems that use cameras and control algorithms to achieve precise placement of encapsulating layers and conductive materials without manual intervention
2Productivity
If complex automation systems are implemented, then productivity and precision are improved, but system complexity and cost increase
Solution Approach 1:
Multiple functions (drilling, heating, pressing, suction) are merged into a single integrated roller unit, reducing the number of separate automation components while maintaining high productivity and precision through coordinated operation of combined functions
Solution Approach 2:
The roller is designed as a multi-functional device that performs drilling, heating, pressing, and suction operations simultaneously, eliminating the need for multiple separate automation systems and reducing overall system complexity
3Adaptability or versatility
If flexible encapsulating layers are used, then adaptability is improved, but positioning precision becomes difficult to achieve
Solution Approach 1:
Holes are pre-drilled in the encapsulating layer before assembly, establishing precise reference positions in advance. This preliminary positioning action allows the flexible material to be accurately placed without compromising its flexibility, as the critical alignment is already established
Solution Approach 2:
The conductive layer with pre-positioned contact points serves as an intermediary reference that guides the positioning of the flexible encapsulating layer. The rigid conductive structure provides stable alignment references that accommodate the flexibility of the encapsulating material
4Reliability
If silkscreen printing is used to apply insulating dielectric masks, then insulation is achieved, but production time and process complexity increase
Solution Approach 1:
The insulating function is extracted from the separate silkscreen printing process and integrated into the encapsulating layer itself. The encapsulating layer is designed to provide both mechanical encapsulation and electrical insulation, eliminating the need for additional dielectric mask application steps
Solution Approach 2:
The encapsulating layer is designed to combine multiple functions: mechanical encapsulation, structural support, and electrical insulation. By merging these functions into a single component, the process time is reduced while maintaining insulation quality
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 solution enables efficient, high-quality production of conductive backsheets with integrated encapsulating and dielectric layers, reducing manual errors, lowering costs, and improving production capacity while providing a flexible and durable insulating solution, thus enhancing the assembly process for photovoltaic panels.
Implementation Method 1
drilling from outside with a laser device
Implementation Method 2
enable the forced suction from inside of the fumes and of the residues by means of an exhaust fan
Implementation Method 3
it is heated totally or partially in such a way as to activate the adhesive characteristic of the thermoplastic material contained in the film of the Stack
Implementation Method 4
it is pressing in such a way as to exert pressure on the Stack (308), in the fixing point (P), against the conductive layer (302) of the backsheet (304)
Data Source
AI summary
Composite operating station and method of drilling and fixing (10) for the continuous production of conductive backsheets (300) with an integrated encapsulating and dielectric layer, for photovoltaic panels of the back- contact type. Said composite operating station is automated and integrates a plurality of working processes carried out simultaneously in a cyclic sequence; in particular, it is based on a multifunction cylindrical roller (100) which by rotating lays out the film of integrated encapsulating and dielectric material, (308), heats it and presses it on the conductive layer (302) of the supporting backsheet for the purpose of the fixing in a correct position, said roller being provided with openings (101) to enable drilling from outside with a laser device (120) and also to enable the forced suction from inside of the fumes and of the residues by means of an exhaust fan (130).