Multi-Nozzle Jet Cleaning of Solar Panel Scribe Lines
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Solution Overview
Problem
Conventional methods for cleaning thin film solar cell panels, such as using roller brushes or high-pressure liquid jet cleaners, struggle to effectively remove particles from the inside of scribe lines without damaging the thin film or causing detachment, and are inefficient in targeting specific areas.
Innovation Solution
A high-pressure liquid jet cleaner with multiple nozzles arranged perpendicular to the solar cell panel's width direction, allowing precise jetting of high-pressure liquid directly into scribe lines, adjustable pressure, and flexible nozzle holder movement to ensure accurate positioning and angle adjustment for efficient particle removal without damaging the thin film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a roller brush is used to remove particles from scribe lines, then particles can be removed through mechanical scrubbing, but the brush diameter is larger than the scribe line width making it difficult to remove particles from corners, and the brush may damage the thin film or require maintenance
Solution Approach 1:
The cleaning function is segmented into multiple independent jet nozzles arranged in an array, each nozzle targeting a specific scribe line. This segmentation allows precise cleaning of individual scribe lines without the dimensional constraints of a roller brush, enabling effective particle removal from corners while maintaining thin film integrity.
Solution Approach 2:
The mechanical scrubbing action of the roller brush is replaced with a high-pressure liquid jet system. This substitution eliminates the need for physical contact with the thin film, preventing mechanical damage while effectively removing particles through hydraulic force. The liquid jet can be precisely controlled to match scribe line dimensions.
2Area of stationary object
If high-pressure liquid is jetted to the entire surface of the solar cell panel, then cleaning coverage is improved, but it becomes difficult to focus the liquid jet on specific scribe lines for assured particle removal
Solution Approach 1:
The cleaning system is divided into multiple segmented jet nozzles, each responsible for a specific scribe line. This segmentation enables focused liquid jet delivery precisely on each scribe line while collectively covering the entire panel surface. The modular nozzle array maintains both wide coverage and precise targeting simultaneously.
Solution Approach 2:
The cleaning approach transitions from a single broad jet (one-dimensional coverage) to a multi-nozzle array (two-dimensional arrangement). This dimensional change allows the system to achieve both extensive coverage across the panel width and precise focusing on each individual scribe line through the spatial arrangement of multiple nozzles.
3Productivity
If the pressure of high-pressure liquid is increased excessively to improve particle removing capability, then particle removal efficiency is improved, but the thin film formed at the surface may be detached
Solution Approach 1:
The high-pressure liquid jet is applied with local quality, concentrating cleaning force precisely on the scribe lines where particles are located rather than distributing it across the entire panel surface. This localized application achieves effective particle removal from scribe lines while minimizing the risk of thin film detachment in the photoelectric conversion cell areas.
Solution Approach 2:
The cleaning action is extracted and isolated to only the scribe line regions through the nozzle array configuration. By directing jets exclusively at scribe lines and avoiding the photoelectric conversion cells, the system separates the particle removal function from the thin film protection requirement, enabling high pressure application where needed without causing damage.
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 ensures reliable removal of conductive and semi-conductive particles from inside scribe lines, preventing short-circuiting and film detachment, while maintaining the integrity of the thin film on the solar cell panel.
Implementation Method 1
a plurality of high-pressure liquid jet nozzles 3 which jet out a high-pressure liquid WJ in a straight line
Data Source
AI summary
A high-pressure liquid jet cleaner removes particles adhered to the inside of scribe lines formed at consistent intervals in a thin film solar cell panel and prevents the surface of a thin film formed at the surface of the solar cell panel from being damaged or detached. Jet nozzles are arranged at consistent intervals in the longitudinal direction of a nozzle holder, corresponding to positions of the respective scribe lines. The nozzle holder is supported by supports provided at both ends of the nozzle holder to allow the nozzle holder to move in the longitudinal direction. While the solar cell panel is conveyed parallel to the scribe lines, a high-pressure liquid is jetted out in a straight line from the jet nozzles to the respective scribe lines for cleaning, such that the high-pressure liquid jetting direction of each jet nozzle is parallel to that of the other jet nozzles.