Solar Cell String Welding Strips for Precise Series Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing method for welding cell strings is prone to bending and deviation due to the flexibility and low hardness of welding strips, leading to inefficiencies and defects in the welding process.
Innovation Solution
A method and series welding machine that involves cutting initial welding strips at specific positions to form interdigitated welding strips, which are then transferred and welded to solar cells with inspections to ensure proper polarity and alignment, reducing the risk of bending and deviation by minimizing movement and using a press tooling for precise contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If welding strips are used to connect solar cells, then the solar cells can be series welded into a cell string, but the welding strips are highly likely to be bent and deformed leading to welding deviation
Solution Approach 1:
The welding strips are pre-baked in an oven at 80-100°C for 10-20 minutes before use. This preliminary heating treatment increases the rigidity of the welding strips, preventing them from bending and deforming during the welding process, thereby maintaining welding alignment precision
Solution Approach 2:
The patent changes the temperature parameter of the welding strips by heating them to 80-100°C before welding. This parameter change transforms the welding strips from a flexible, bend-prone state to a rigid, stable state, resolving the contradiction between ease of manufacture and manufacturing precision
Data Source
AI summary
Embodiments of the present disclosure provide a method for welding cell strings and a series welding machine. The method includes: forming an arrangement of a plurality of solar cells; inspecting the arrangement of the plurality of solar cells; providing a plurality of initial welding strips including first initial welding strips and second initial welding strips, the first initial welding strips interleave with the second initial welding strips in a first direction; cutting each of the first initial welding strips at first cutting positions, and cutting each of the second initial welding strips at second cutting positions, to obtain a plurality of welding strips; moving each welding strip in a second direction to form a set of welding strips; transferring the set of welding strips onto the arrangement of the plurality of solar cells; and welding the plurality of welding strips to corresponding solar cells to form a cell string.