Process for producing pre-tin-plated connectors for pv cells and metal foil having a groove structure running in one direction

A metal foil and pre-tinning technology, applied in the field of metal foil, can solve the problems of insufficient pre-tinning and other problems

Inactive Publication Date: 2013-09-25
SCHLENK METALLFOLIEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this leads to insufficient pre-tinning for connectors with corrugated structures, while sufficient pre-tinning allows reliable soldering of the connectors in automatic processes
A connector with a corrugated structure can therefore only be soldered to a PV cell by supplying solder from the outside, for example by means of a distribution head

Method used

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  • Process for producing pre-tin-plated connectors for pv cells and metal foil having a groove structure running in one direction
  • Process for producing pre-tin-plated connectors for pv cells and metal foil having a groove structure running in one direction
  • Process for producing pre-tin-plated connectors for pv cells and metal foil having a groove structure running in one direction

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Embodiment Construction

[0058] By means of the method according to the invention should be produced pre-tinned connectors for PV cells 29 ( Figure 4 and 5 ), the connector is a strip 10 with a flat cross-section, and has a first wide side 12 above and a second wide side 14 below and two narrow sides 16, which connect the wide sides 12 respectively , 14 opposite edges. The cross-section of the strip 10 has a width of 1 mm and a height of 0.1 mm ( figure 1 ). The strip 10 has a copper core and has a thin silver layer on its upper and lower broad sides for improved conductivity and reflectivity. The silver layer is not shown in the figure.

[0059] The lower broadside 14 is smooth, while the upper broadside 12 has a corrugated structure 18 with a triangular profile ( figure 1 ), the triangular profile has an angle α of 120° at the peak and valley. The distance between the peaks of the groove structure 18 is 150 μm, and the depth of the groove structure is correspondingly about 40 μm. The length ...

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Abstract

To produce pre-tin-plated strips of connectors for PV cells, a metal foil (30) is guided through a roll gap (46) of a roll unit, in which at least one roll (48) has a surface with a groove structure, such that a groove structure having ridges or vertices and valleys is pressed at least into one side of the metal foil (30), tin solder in the form of solder preforms (54) is applied to that side of the metal foil (30) which has the impressed groove structure, wherein the soldering flux required for the tin plating has previously been applied to the solder preforms or the metal foil, the solder preforms (54) are connected to the metal foil (30) or applied thereto and melted, and the tin-plated metal foil (30) which has the impressed groove structure is separated into parallel strips.; The solder preforms (54) have such a thickness that the groove structure is at least filled up after the solder preforms (54) have been melted.

Description

technical field [0001] The invention relates to a method for producing a pre-tinned connector of a PV cell (photovoltaic cell) having a corrugated structure extending in the longitudinal direction. Furthermore, the invention relates to a metal foil having, on at least one side, a corrugated structure extending in the longitudinal direction. Background technique [0002] Connectors for PV cells are strips of conductive material having a flat cross-section with a first and a second broad side extending over its entire length and two Narrow sides connecting opposite edges of the wide sides respectively. At least the first broad side has a corrugated structure extending in the longitudinal direction of the strip. [0003] In the form in which they are supplied, connectors for PV cells are usually wound into rolls with a relatively long length of tape and then individually cut off from the tape. The definition of the first and second broad side or upper side and lower side res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/05H01L31/052C23C6/00
CPCH01L31/0508C23C24/106Y02E10/52H01L31/0547Y10T428/1241H01L31/05C23C6/00H01L31/052H01L31/02021
Inventor T·博茨F·迪斯特尔拉特
Owner SCHLENK METALLFOLIEN
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