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Photovoltaic welding tape and preparation method

A technology of photovoltaic welding tape and welding wire, applied in the field of solar cells, can solve the problems of low adhesion and large tin consumption of photovoltaic welding tape, and achieve the effects of saving cost, reducing the amount of solder and reducing resistance

Inactive Publication Date: 2017-01-11
SHANGHAI BYD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a photovoltaic soldering ribbon for the problems of large tin consumption and low adhesion in the prior art

Method used

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  • Photovoltaic welding tape and preparation method
  • Photovoltaic welding tape and preparation method
  • Photovoltaic welding tape and preparation method

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preparation example Construction

[0040] The present invention also provides a method for preparing the above-mentioned photovoltaic soldering tape, which includes the following steps:

[0041] S1. Provide a conductive base tape. The surface of the conductive base tape includes a blank transition area and a welding area for welding solar cells, and the welding area and the transition area are spaced along the length of the photovoltaic welding tape;

[0042] S2. Under the action of ultrasound, the welding wire is heated and melted above the conductive base tape, so that the melt obtained after melting is attached to the welding area of ​​the conductive base tape, and the solder layer is obtained after cooling.

[0043] In step S1, a conductive baseband is first provided. As mentioned above, the material and structure of the conductive baseband can be the same as the existing ones. For example, the conductive base tape material is selected from one of copper, aluminum, copper-aluminum alloy, copper-silver alloy, and ...

Embodiment 1

[0062] This embodiment is used to illustrate the photovoltaic ribbon and its preparation method disclosed in the present invention.

[0063] The copper wire produced by Luotong was hot-pressed and annealed to obtain a copper tape with a size of 1.6mm×0.200mm (width 1.6mm, thickness 0.200mm) as a conductive base tape. The conductive base tape 1 coming out of the unwinding reel 5 is immersed and passed through the flux pool 6 (using the model 811 flux of Heming Technology Co., Ltd.). After exiting the pool, such as figure 2 As shown, a layer of flux layer 2 is formed on the surface of the conductive base tape 1, and then the surface of the copper tape is heated to 200±10°C by the conductive base tape heater 8, and two ultrasonic electric soldering iron automatic welding machines with electric welding heads 7 are used ( The main functional part of the equipment is an ultrasonic soldering iron, produced by South Korea’s MECS company, model MR-5030) for construction, one of which is c...

Embodiment 2

[0068] This embodiment is used to illustrate the photovoltaic ribbon and its preparation method disclosed in the present invention.

[0069] The method of Example 1 was used to prepare photovoltaic ribbons. The difference is that the width of the electric welding head is 1.6mm, and the diameter of the welding wire is 0.90mm.

[0070] The width of the obtained solder layer is 1.3±0.2mm, the thickness of the solder layer is 0.025±0.002mm, and the total thickness of the photovoltaic ribbon is 0.225mm.

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Abstract

The invention provides a photovoltaic welding tape. The tape is used for overcoming the problem that the photovoltaic welding tape in the prior art is large in tin consumption and low in adhesion. The tape comprises a conductive base tape. The surface of the conductive base tape comprises a blank transition zone and a welding zone used for welding a solar cell. The welding zone and the transition zone are disposed at interval along the length direction of the photovoltaic welding tape. A solder layer is attached to the welding zone. The invention further discloses a preparation method of the above photovoltaic welding tape. The photovoltaic welding tape provided by the invention allows a solder layer to be prepared on part of the surface of the conductive base tape, so that the amount of solder is effectively saved, the cost is reduced, and the solder layer can be strongly attached to the surface of the conductive base tape.

Description

Technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a photovoltaic ribbon for solar cell components and a preparation method thereof. Background technique [0002] The components used in solar power generation are composed of monolithic cells connected in series and parallel, and the series and parallel connections of the cells are realized by the photovoltaic welding belt welded to the grid. At present, the usual production process of photovoltaic ribbon is hot dip plating, that is, the conductive base tape (usually electrolytic oxygen-free copper tape) is first passed through the flux pool under the action of tension, and then immersed and passed through the molten tin alloy ( Generally, it is a soldering furnace of tin-lead alloy, tin-copper alloy, tin-copper-silver alloy, etc. After the copper strip is out of the furnace, it is blown and cooled by a fan to obtain a solder strip plated with a tin alloy. [0003] In the existing...

Claims

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Application Information

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IPC IPC(8): H01L31/05H01L31/18
CPCH01L31/0504Y02E10/50Y02P70/50
Inventor 谭伟华姜占锋左静秦世嵘
Owner SHANGHAI BYD