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Photovoltaic module main grid structure and preparation method and application thereof

A photovoltaic module and busbar technology, which is applied in the field of its preparation and photovoltaic module busbar structure, can solve problems such as inconsistent welding tension, achieve uniform welding pad tension, control tin temperature, and increase welding tension.

Pending Publication Date: 2022-05-31
TRINA SOLAR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a photovoltaic module busbar structure, its preparation method and application. The present invention effectively improves the soldering process by setting the area of ​​the pads in the busbar structure to be different during the welding process. The problem of inconsistent welding tension caused by uneven heating of the disc can effectively improve the welding tension of the battery

Method used

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  • Photovoltaic module main grid structure and preparation method and application thereof
  • Photovoltaic module main grid structure and preparation method and application thereof
  • Photovoltaic module main grid structure and preparation method and application thereof

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preparation example Construction

[0055] In another specific embodiment, the present invention provides a preparation method of the above-mentioned photovoltaic module busbar structure, such as image 3 As shown, the preparation method specifically comprises the following steps:

[0056] The busbar 9 is printed on the substrate 1 of the photovoltaic module, the substrate 1 with the busbar 9 is placed on the heating table 6 at 25-100° C., and the soldering layer is placed on the pad 2 in turn, and the soldering is performed under lamp heating. Then, the busbar structure of the photovoltaic module is prepared. Among them, in the process of lamp heating, the lamp tube 7 is used to emit heating light 8 for irradiation heating.

[0057] The present invention also provides a photovoltaic assembly, the photovoltaic assembly includes a substrate 1 and a grid line, and the busbar 9 in the grid line adopts the above-mentioned photovoltaic assembly busbar structure.

Embodiment 1

[0059] This embodiment provides a photovoltaic module busbar structure, based on a specific implementation, such as figure 1 As shown in I, the area of ​​the pad 2 increases sequentially along the direction of the busbar 9 close to the central area of ​​the soldering box.

Embodiment 2

[0061] This embodiment provides a photovoltaic module busbar structure, compared with Embodiment 1, such as figure 1 As shown in II, along the direction of the main grid 9 close to the central area of ​​the soldering box, the area of ​​the pad 2 increases in turn, and a linear hollow is set on the pad 2, which is divided into 4 longitudinal linear hollows and 5 horizontal hollows. Linear cutout.

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Abstract

The invention provides a main grid structure of a photovoltaic module and a preparation method and application thereof, the main grid structure of the photovoltaic module comprises a main grid and at least two bonding pads arranged on the main grid at intervals, and the areas of the bonding pads are sequentially increased from low temperature to high temperature. According to the invention, the areas of the bonding pads in the main grid structure are different, so that the problem of inconsistent welding tension caused by non-uniform heating of the bonding pads in the welding process is effectively improved, and the welding tension of the battery is effectively improved.

Description

technical field [0001] The invention belongs to the technical field, and relates to a photovoltaic module busbar structure, a preparation method and application thereof. Background technique [0002] Photovoltaic modules are connected in series by photovoltaic cells through welding strips to form a circuit and derive current. Silver is generally printed on the battery, and the ribbon is welded on the silver, so as to realize the transfer of current from the silver to the ribbon. The welding of the ribbon and the silver is mainly through the high temperature of tin, and the tin and silver form Ag 3 Sn metal compound layer to provide solder pull. The control of the welding tension at the component end generally controls the tension between the welding tape and the silver PAD (ie pad) point. The PAD point tension plays a role in fixing the welding tape and ensuring the reliability of the product. [0003] The tension between the PAD point and the ribbon is affected by three...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/05H01L31/18
CPCH01L31/022433H01L31/0508H01L31/0512H01L31/18H01L31/188Y02E10/50
Inventor 朱强忠徐建美冯志强田国荣丁志强
Owner TRINA SOLAR CO LTD
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