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Interconnected grid line and manufacturing method, applicable solar cell and interconnect mode

A technology of solar cells and solar cells, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as high cost, short circuit of cells, and reduction of battery output power, so as to save costs, reduce series resistance, and improve battery performance Effect

Pending Publication Date: 2019-01-25
SUZHOU SUNWELL NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the pressure is applied between the cells, this solution will easily cause the conductive glue 640 to overflow to the sides of the cells to form a parallel resistance and reduce the output power of the cells and even cause a short circuit of the cells, such as Image 6 as shown in c
[0005] In addition, in the existing technical solutions, the main electrode is used for converging currents and forming good conductive contact with conductive glue, which is generally made of screen-printed silver paste, which is relatively expensive

Method used

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  • Interconnected grid line and manufacturing method, applicable solar cell and interconnect mode
  • Interconnected grid line and manufacturing method, applicable solar cell and interconnect mode
  • Interconnected grid line and manufacturing method, applicable solar cell and interconnect mode

Examples

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Effect test

Embodiment 1

[0033] Such as figure 1 As shown in a, the left side is a schematic diagram of the battery sheet, and the right side is a schematic diagram of the electroplated grid line structure after the interconnection area is enlarged.

[0034] In this embodiment, the electroplated grid wire includes a metal grid wire frame 130 fabricated in the area where the battery slices are interconnected at the long side boundary of the solar battery slice 110 . It includes a main frame 131 parallel to the long side of the battery and connected to one end of the metal sub-gate electrode 120 on the battery sheet, two horizontal sub-frames 132 and a vertical sub-frame 133 . The main frame 131 has a height of about 2-20 μm, preferably 5-12 μm, and a width of 12-300 μm, preferably 80-300 μm. The three sub-frames 132 and 133 have a height of about 2-20 μm, preferably 5-12 μm, and a width of 12-300 μm, preferably 12-45 μm. The length of the lateral sub-frame 132 is about 0.5-3 mm, preferably about 1 m...

Embodiment 2

[0039] Such as figure 2 As shown, the left side is a schematic diagram of the battery sheet, and the right side is a schematic diagram of the electroplated grid line structure after the interconnection area is enlarged.

[0040] In this embodiment, the electroplated grid wire includes a metal grid wire frame 230 made in the area where the battery slices are interconnected at the long side boundary of the solar battery slice 210 .

[0041] In this embodiment, the main frame 231 and the secondary frame 232 have the same width, preferably 80-200 μm, and the frame height is about 2-20 μm, preferably 5-12 μm. The length of the lateral sub-frame 132 is about 0.5-3 mm, preferably about 1 mm. The beneficial effect of using a wider sub-frame is that the charge is transmitted through the surrounding frames, not only through the main frame and the conductive glue, which reduces the series resistance and the metal grid wire frame 230 still has a good role in balancing the current when t...

Embodiment 3

[0045] Such as image 3 As shown, the left side is a schematic diagram of the battery sheet, and the right side is a schematic diagram of the electroplated grid line structure after the interconnection area is enlarged.

[0046] In this embodiment, the electroplated grid wire includes a metal grid wire frame 330 made in the area where the battery slices are interconnected at the long side boundary of the solar battery slice 310 .

[0047] In this embodiment, the sub-frame 332 has a width of 12-300 μm, preferably 12-45 μm, and a height of about 2-20 μm, preferably 5-12 μm. The main frame 331 is a grid-shaped fine grid, and the width of each fine grid line is preferably about 15-45 μm. Using the grid-shaped fine grid as the main frame 331 can reduce the maximum width of the electroplating grid lines and ensure sufficient adhesion of the electroplating grid lines.

[0048] In this embodiment, there is a metal layer 333 with a pattern structure inside the metal grid wire frame 3...

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Abstract

The invention discloses an interconnecedt gate line and a manufacturin method which are Applicable solar cells and interconnected modes, the method includes a metal grid frame disposed between regionswhere two adjacent battery sheets are stacked with respect to each other, The metal grid wire frame comprises a main frame vertically connected with the parallel battery sheet metal sub-grid electrodes, a longitudinal sub-frame parallel to the main frame and not connected with the battery sheet sub-grid, and a transverse sub-frame connected with the main frame and the longitudinal sub-frame on both sides. Then, the front surface of one solar cell sheet and the back surface of the other solar cell sheet are connected through a conductive adhesive filled in a rectangular frame formed by metal grid lines to form an interconnected solar cell. The fabricated metal grid frame has certain blocking effect on the conductive adhesive, and can prevent or reduce the conductive adhesive from overflowing when the battery sheet is overlapped, thereby avoiding the short circuit of the battery sheet caused by the formation of the series resistance.

Description

technical field [0001] The invention belongs to the field of solar energy manufacturing, and in particular relates to an interconnect grid line and a manufacturing method, a suitable solar cell and an interconnection method. Background technique [0002] In recent years, photovoltaic new energy has occupied an increasingly important position in the world's energy structure, which is largely due to its role in environmental protection and has gradually developed under the policy support of various governments. However, if you want to make photovoltaic new energy sufficiently competitive in a free market environment, and even achieve an equal share with traditional fossil energy in terms of energy structure, you still need the continuous efforts of major photovoltaic companies and research institutions to increase the efficiency of photovoltaic power generation Reduce power generation costs. The research and development of both photovoltaic module technology and photovoltaic ...

Claims

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Application Information

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IPC IPC(8): H01L31/0224H01L31/05
CPCH01L31/022433H01L31/05Y02E10/50
Inventor 李中天姚宇邓晓帆
Owner SUZHOU SUNWELL NEW ENERGY CO LTD
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