Equipment used for visual positioning and angle detection of solar cells before series welding

Abstract

The invention provides equipment used for visual positioning and angle detection of solar cells before series welding. The equipment comprises a support rack, a Y-axis slide rail, an X-axis slide rail, a manipulator, a bracket bedplate, an imaging mechanism, a cell correction mechanism, and a feeding plate, wherein the Y-axis slide rail is fixed at the top end of the support rack; the X-axis slide rail is mounted on the Y-axis slide rail and can move along the Y-axis slide rail; the manipulator is mounted on the X-axis slide rail and can move along the X-axis slide rail; the bracket bedplate is mounted below the Y-axis slide rail; the imaging mechanism is mounted on the bracket bedplate; the cell correction mechanism is mounted at the right side of the imaging mechanism; and the feeding plate is mounted at the right side of the cell correction mechanism. According to the equipment, the position and angle correction of the solar cells can be realized automatically in a moving process, so that the production efficiency and the production line flexibility are improved. The invention further provides a method for used for visual positioning and angle detection of the solar cells before series welding. According to the method adopting visual correction, the correction process of solar cell workpieces can be performed fast and accurately, and the series welding efficiency and precision of the solar cells are improved.

Description

technical field [0001] The invention belongs to the technical field of solar cell production, and in particular relates to a visual positioning and angle detection device and detection method before serial welding of solar cell sheets. Background technique [0002] The recovery of the photovoltaic industry after 2013 coincided with the adjustment and upgrading of the national industrial structure, coupled with the recent implementation of the "Made in China 2025" strategy, and the independent research and development of high-end equipment for photovoltaic module production systems is full of business opportunities. Solar cells are the basic components in the photovoltaic industry. Common cell sizes are 125×125, 156×156, 150×150 and 103×103, and the thickness is generally 0.23mm. [0003] There is a process in the production process of solar cells called stringing. Before stringing, the position and angle of the cells need to be corrected. At present, most solar cell manufact...

AI Technical Summary

Problems solved by technology

[0006] 3. For workpieces with large deviations, the mechanical correction station may crush the workpiece

[0007] 4. Unable to adapt to the situation that the workpiece size often changes in the actual production line

However, most of the existing vision solutions use a special vision positioning station, and the cells need to be placed in a special positioning station for off-line positioning after shutdown, which also cannot solve the problems of time-consuming correction and workpiece damage.

[0009] In order to solve the above problems, some solar cell manufacturers at home and abroad have also conducted a lot of research. For example, the Chinese patent application number CN201210115797.0 discloses "a fully automatic stringing production line for solar cells". A damage and grid line position detection and correction device is set up to correct the string-welded cells, but the damage and grid line position detection and correction device can only analyze and memorize qualified and unqualified cells through a microcomputer, and this patent is not disclosed The specific structure and working method of the damage and grid line position detection and correction device; another example is the Chinese patent application number CN201210144462.1 which discloses "a solar cell grid line position correction device and solar cell string welding equipment". The cell grid line position correction device judges the position of the cell by detecting the reflection on the edge of the main grid line of the solar cell. The light beam at the edge of the grid line uses the photoelectric signal conversion unit arranged on the fixed part to receive the optical signal reflected from the edge of the main grid line, and generates a corresponding electrical signal, and the direction pointed by the photoelectric signal conversion unit is consistent with the irradiation generated by the light source irradiation unit. The angle formed by the irradiation direction of the light beam at the edge of the main grid line of the cell ranges from 35° to 45°, and the data processing device controls the cell adjustment component to adjust the position of the cell according to the electrical signal generated by the collected photoelectric signal conversion unit, so as to achieve Position and adjust cells of different specifications

However, the reflected light in this detection method is easily interfered by other light in the environment, the accuracy is not high, and the equipment is complicated and difficult to control

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