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Solar battery piece assembly and assembling method thereof

A solar cell and assembly method technology, applied in the direction of electrical components, circuits, photovoltaic power generation, etc., can solve the problems of limited wiring space, low wiring density, and poor flexibility, and achieve less wiring space restrictions and high wiring density. High, cost-reducing effects

Inactive Publication Date: 2018-06-15
BEIJING COMPO ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the traditional cell assembly method still has the problems of limited wiring space, low wiring density, poor flexibility and many steps

Method used

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  • Solar battery piece assembly and assembling method thereof
  • Solar battery piece assembly and assembling method thereof
  • Solar battery piece assembly and assembling method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 Assembly method X1 of solar cell module

[0035] Place the flexible circuit board with a thickness of 0.1mm under the printing machine and fix it well. The design size of the stencil opening of the printing machine corresponds to the electrode position of the IBC cell, and the thickness of the stencil is 0.1mm. The SnBi alloy solder paste is printed on the flexible circuit board with a printing machine, and the hanging pressure is 5kg, and the printing speed is 25mm / sec. Put it into a reflow oven, set the peak temperature of the reflow oven to 190°C, and complete the final soldering.

Embodiment 2

[0036] Embodiment 2 Assembly method X2 of solar cell module

[0037] Place the flexible circuit board with a thickness of 0.25mm under the printing machine and fix it well. The design size of the stencil opening of the printing machine corresponds to the electrode position of the IBC cell, and the thickness of the stencil is 0.08mm. The SnBiCu alloy solder paste is printed on the flexible circuit board with a printing machine, and the hanging pressure is 6kg and the printing speed is 50mm / sec. Put it into a reflow oven, set the peak temperature of the reflow oven to 190°C, and complete the final soldering.

Embodiment 3

[0038] Embodiment 3 Assembly method of solar cell module X3

[0039]Place the flexible circuit board with a thickness of 0.4mm under the printing machine and fix it well. The design size of the stencil opening of the printing machine corresponds to the electrode position of the IBC cell, and the thickness of the stencil is 0.15mm. The SnSbBi alloy solder paste is printed on the flexible circuit board with a printing machine, the hanging pressure is 7kg, and the printing speed is 75mm / sec. Put it into a reflow oven, set the peak temperature of the reflow oven to 190°C, and complete the final soldering.

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Abstract

The invention relates to a solar battery piece assembly and an assembling method thereof. The solar battery piece assembly comprises a solar battery piece, low-temperature lead-free tin paste and a flexible circuit board; and the solar battery piece is welded on the flexible circuit board by using the low-temperature lead-free tin paste through a backflow welding manner. By adoption of a solder-strip-free battery pack series technology, the problem of influence to the collection efficiency of a photovoltaic module current from the quality of a solder strip in the conventional process is eliminated; the low-temperature lead-free tin paste is adopted between the battery piece and the flexible circuit board, and the backflow peak temperature is controlled to be 190 DEG C or below, so that thephenomena of solar battery piece cracking or hidden cracking caused by an overhigh welding temperature can be avoided; meanwhile, silver paste is not used, so that production cost is greatly lowered;by taking the flexible board as the welding circuit board, the thickness of the solar battery assembly can be greatly lowered; and therefore, the solar battery piece assembly has the characteristicsof low limitation on the overall wiring space of the assembly, high wiring density, high flexibility and less process steps.

Description

technical field [0001] The invention relates to the field of cell assemblies, in particular to a solar cell assembly and an assembling method thereof. Background technique [0002] Power generation efficiency has always been a hot issue for researchers in the photovoltaic industry. Compared with traditional solar cells, the conversion efficiency of IBC cells is higher. This is because it transfers all the metal contacts of the positive and negative poles to the back of the cell, so that the front of the cell facing the sun is completely black, and the metal wires on the front of most photovoltaic cells are completely invisible, so it has a higher short-circuit current. At the same time, the back side can allow a wider metal grid line to reduce the series resistance and improve the fill factor; plus the open-circuit voltage gain brought by the front surface field (FSF) and good passivation of the battery, the front side is unobstructed The battery has a high conversion effic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/05B23K1/00B23K1/008
CPCY02E10/50H01L31/0516B23K1/0008B23K1/008H01L31/0512
Inventor 贺会军张江松朱捷王志刚安宁朱学新赵朝辉祝志华张富文刘希学张品李志刚张焕鹍卢茂成徐蕾
Owner BEIJING COMPO ADVANCED TECH
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