Back-Contact Cell Ribbon Soldering With Precision Clamping Layout
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Solution Overview
Problem
Conventional soldering technologies for solar cells fail to achieve high-precision soldering of back contact cells due to ineffective ribbon production and positioning, leading to poor soldering precision.
Innovation Solution
A method involving a soldering device with a soldering platform, clamping portions, and a heater, where back contact cells are positioned with their back surfaces facing upward, and ribbons are simultaneously clamped, transferred, and soldered using a staggered arrangement of clamping jaws and cutting members to improve precision and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional series soldering technology is used, then the process is simple, but soldering precision is poor
Solution Approach 1:
The soldering device is divided into multiple independent clamping portions (first, second, and third clamping portions) that can simultaneously clamp different sections of multiple ribbons. Each clamping portion has clamping jaws that can be independently adjusted to match ribbon positions, enabling precise positioning of multiple ribbons during simultaneous soldering, thereby resolving the contradiction between soldering precision and device complexity.
Solution Approach 2:
The patent combines multiple clamping functions into a single integrated soldering device that can simultaneously clamp and solder multiple ribbons on multiple back contact cells in one operation. This merging of functions allows high-precision soldering of multiple cells simultaneously, improving both soldering precision and production efficiency without requiring separate soldering operations for each cell.
2Productivity
If conventional soldering method is used, then equipment is simple, but production efficiency is low
Solution Approach 1:
The soldering device integrates multiple clamping portions with clamping jaws that can simultaneously clamp multiple ribbons, and includes a heater that can simultaneously solder multiple ribbons to multiple back contact cells in one operation. This merging of multiple soldering functions into a single device enables high-precision simultaneous soldering of multiple cells, significantly improving production efficiency while maintaining manageable device complexity.
Solution Approach 2:
The clamping portions with adjustable clamping jaws perform preliminary positioning of multiple ribbons before soldering, ensuring precise alignment with the back contact cells. This preliminary action of precise positioning enables subsequent high-precision simultaneous soldering operations, improving both production efficiency and soldering quality.
3Manufacturing precision
If ribbons are positioned manually, then device is simple, but soldering precision is poor
Solution Approach 1:
The device segments the ribbon positioning function into multiple independent clamping portions, each with adjustable clamping jaws that can be independently positioned to match the specific layout of ribbons and back contact cells. This segmentation allows precise positioning of each ribbon section while maintaining ease of operation through independent adjustment of each clamping portion.
Solution Approach 2:
The clamping jaws are designed to be adjustable and movable, allowing dynamic positioning to match different ribbon configurations and back contact cell layouts. This dynamic adjustability enables precise ribbon positioning for different production requirements while maintaining operational ease through simple mechanical adjustments.
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 approach enhances soldering precision and production efficiency, allowing for closer placement of fingers with opposite polarity to busbars without short circuits, thereby improving cell and module efficiency.
Implementation Method 1
heating the plurality of ribbons by using a heater to connect the plurality of ribbons to the plurality of back contact cells
Data Source
AI summary
A method for soldering a solar cell, includes: placing a plurality of back contact cells on a soldering platform, where back surfaces of the back contact cells face away from the soldering platform, and electrodes corresponding to two adjacent back contact cells have opposite polarities in a connection direction of a plurality of to-be-connected ribbons; placing the plurality of to-be-connected ribbons on the electrodes of the plurality of back contact cells by using a first clamping portion, a second clamping portion, and a plurality of third clamping portions, where the first clamping portion, the second clamping portion, and the plurality of third clamping portions respectively correspond to head ends, tail ends, and middle portions of the plurality of ribbons; and heating the plurality of ribbons by using a heater to connect the plurality of ribbons to the plurality of back contact cells.