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Solar battery piece welding heating and welding strip fixing method and device

A solar cell, cell welding technology, applied in auxiliary devices, welding equipment, welding equipment, etc., can solve the problem of inability to accurately control the deviation of the welding strip and the battery strip and the grid line of the cell, and the inability to accurately control the battery. The problems of sheet temperature and uneven stress on the cell are achieved to achieve large-scale promotion and application, avoid light decay defects, and reduce the incidence of defects.

Inactive Publication Date: 2016-10-12
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 203556978 U proposes the use of infrared lamps for heating and welding. Although this device integrates the heating source and does not require an additional heat source, it does not avoid the problem of light decay of the battery caused by infrared heating, and cannot accurately control the battery. The temperature of the chip in various stages such as preheating, welding, and cooling
Chinese patent CN 203062027 U proposes the use of electromagnetic induction heating welding method and ceramic pressing pins to stabilize the ribbon. Although this is a great progress in the field of stringer welding machines, using ceramic pressing pins to stabilize the ribbons due to their own weight will lead to weak stress on the cells. Evenly increase the rate of lobes and hidden cracks
[0009] There are other works done by some workers, such as Chinese patent CN 203184849 U, which has made some improvements to the welding ribbon pressure stabilization device, but it is still unable to control the pressure between the welding ribbon and the battery sheet and the grid line of the welding ribbon and the battery sheet. Accurate control of the degree of deviation, there are certain defects

Method used

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  • Solar battery piece welding heating and welding strip fixing method and device
  • Solar battery piece welding heating and welding strip fixing method and device
  • Solar battery piece welding heating and welding strip fixing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1. Adjust the distance between the middle electromagnetic welding head and the battery directly above it to 40mm, and adjust the strength of the alternating magnetic field so that the temperature of the battery directly above the middle electromagnetic welding head is 220°C. The distance between the second left electromagnetic welding head and the cell directly above it is 90mm, and the strength of the alternating magnetic field is adjusted so that the temperature of the cell directly above the second left electromagnetic welding head is 140°C. The distance between the second right electromagnetic welding head and the cell directly above it is 90mm, and the strength of the alternating magnetic field is adjusted so that the temperature of the cell directly above the second right electromagnetic welding head is 140°C. The distance between the left electromagnetic welding head and the cell directly above it is 150mm, and the strength of the alternating magnetic field is adj...

Embodiment 2

[0048] The process is the same as that in Example 1. Adjust the temperature of the cell above the middle electromagnetic welding head to 230°C, the temperature of the cell above the second left electromagnetic welding head and the second right electromagnetic welding head to 150°C, and adjust the temperature of the first left electromagnetic welding head and the first right electromagnetic welding head The temperature of the upper cell is 80°C; the height value of the infrared sensor is set to 0mm, and the pressure value of the pressure sensor is set to 0.05±0.01N. The statistics of the defect rate of battery sheet welding are measured, and the welding defect rate of battery sheet is measured to be 0.42% (split and hidden crack rate 0.15%; virtual welding and open welding rate 0.25%).

Embodiment 3

[0050] The process is the same as that in Example 2. Adjust the temperature of the cell above the middle electromagnetic welding head to 210°C, the temperature of the cell above the second left electromagnetic welding head and the second right electromagnetic welding head to 130°C, and adjust the temperature of the first left electromagnetic welding head and the first right electromagnetic welding head The temperature of the upper cell is 60°C; the height value of the infrared sensor is set to 0mm, and the pressure value of the pressure sensor is set to 0.35±0.01N. The statistics of the welding defects of the battery sheet are measured, and the welding defect rate of the battery sheet is measured to be 0.45% (the rate of splinters and hidden cracks is 0.30%; the rate of virtual welding and open welding is 0.13%).

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Abstract

The invention discloses a solar battery piece welding heating and welding strip fixing method and device, and relates to a solar battery piece. The device is provided with a welding strip fixing device and a battery piece welding heating device. The welding strip fixing device is provided with an iron block where a pressing block is embedded, the pressing block, a pressure sensor, an infrared sensor and a battery piece conveying rack. The pressing block is embedded to the iron block. The pressure sensor and the infrared sensor are arranged on the lower portion of the pressing block. The pressure sensor is used for detecting the distance between the pressing block and a welding strip. The infrared sensor is used for detecting the contact pressure between the pressing block and the welding strip. The welding strip is arranged below the pressing block and laid at the grid line position of the battery piece. The battery piece is arranged on the battery piece conveying rack. The battery piece welding heating device is provided with five electromagnetic welding heads. The five electromagnetic welding heads are embedded to five iron blocks, and lifting rods are arranged between the iron blocks where the electromagnetic welding heads are embedded and a base correspondingly. The solar battery piece welding heating and welding strip fixing device is easy to operate and high in reliability.

Description

technical field [0001] The invention relates to a solar battery sheet, in particular to a method and a device for welding and heating a solar battery sheet and fixing a welding strip. Background technique [0002] The world is facing an energy crisis and the heavy use of traditional energy has caused serious pollution to the environment, which has become a major constraint on the development of society and the national economy. In order to achieve sustainable development, governments of various countries urgently need to adjust the energy structure and vigorously develop renewable energy. Therefore, solar power generation technology received worldwide attention. [0003] The application of solar power generation technology and solar cells has made the world see the dawn. Among them, crystalline silicon components are the process link in the development of solar cells, and the power generation efficiency of solar cell components will directly determine the quality of componen...

Claims

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Application Information

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IPC IPC(8): B23K31/02B23K37/04B23K37/00B23K101/38
CPCB23K31/02B23K37/00B23K37/0408B23K2101/38
Inventor 罗学涛熊华平唐天宇甘传海赖惠先黄柳青
Owner XIAMEN UNIV