Manufacturing method of solar cell module, method of connecting solar cell module and ribbon
A technology for solar cells and manufacturing methods, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as deterioration, warpage of solar cells, peeling adhesion of sealing resin, etc., and achieve the effect of improving connection reliability.
Active Publication Date: 2017-03-29
DEXERIALS CORP
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Problems solved by technology
[0005] However, there is a concern that the solar cells may warp due to the high temperature connection process of about 260°C during soldering.
In addition, since flux is used for soldering, there is concern that the residue of the flux may peel off the sealing resin of the solar battery cell or deteriorate the adhesiveness.
Method used
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Embodiment 1
[0078] Next, an example of the present invention will be described comparing the case of connecting ribbons without using a buffer material and the case of changing the thickness of the buffer material. In both the examples and the comparative examples, a solar battery cell composed of a silicon crystal type photoelectric conversion element was used, and a sheet of copper foil with a thickness of 150 μm was used as a ribbon connected to the solar battery cell via a conductive adhesive film. A 1.5 mm wide solder strip plated with a thickness of 5 μm. In addition, as the conductive adhesive film, SP100 series (manufactured by Sony Chemical & Information Device Co., Ltd.) was used. Then, the ribbon is placed on the electrodes of the solar battery cell through the conductive adhesive film, and the ribbon is electrically connected to the electrodes on the front and back of the solar battery cell by heating from the ribbon with a heating press head. The connection conditions were 1...
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The object of the present invention is to ensure a sufficient reliability of the connection between a tab wire and a solar cell and also to maintain output power. The present invention provides such a configuration that is provided with a plurality of solar cells (2), each having a plurality of linear electrodes (12) serving as surface electrodes formed on one surface side by side, with a back surface electrode (13) formed on the other surface; and a tab wire 3 that is formed on the plural surface electrodes (12) of the one solar cell (2) so as to intersect therewith, and is also formed on the back surface electrode (13) of another solar cell (2) adjacent to the one solar cell (2), with an adhesive agent (17) interposed therebetween, and by carrying out heating and pressing processes onto the tab wire (3) with a buffer material (31) interposed therebetween, the adhesive agent (17) is cured and the tab wire (3) is pressed onto the surface electrodes (12) so as to be deformed into a wave shape along the longitudinal direction; thus, it is possible to release a stress caused by linear expansion not only as a component in parallel with the in-plane direction of the solar cell (2), but also as a component in a vertical direction, and consequently to solve the above-mentioned problem.
Description
technical field [0001] The present invention relates to a solar cell module in which connecting electrodes of a plurality of solar cell cells are electrically connected to each other by a tab wire, and a method for connecting the solar cell module and the tab wire. [0002] This application claims priority based on Japanese Patent Application No. Japanese Patent Application No. 2011-193340 for which it applied in Japan on September 5, 2011, By referring this application, it is used in this application. Background technique [0003] In general, a solar battery is used as a solar battery module that achieves an output of 100 W or more by connecting a plurality of solar battery cells in series. [0004] In a crystalline silicon-based solar cell module, a plurality of adjacent solar cells are connected by a ribbon as an interconnection, and the ribbon is made of a conductive material such as a strip-shaped copper foil coated with solder. One end of the ribbon is soldered to the...
Claims
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IPC IPC(8): H01L31/05H01L31/18
CPCH01L31/188H01L31/0504H01L31/0512Y02E10/50
Inventor 奥宫秀昭须贺保博樋口明史新康正藤井贵启
Owner DEXERIALS CORP