Solar cell module, manufacturing method for solar cell module, and reel-wound body with tab wire wound therearound
A technology for solar cells and manufacturing methods, which is applied to conductive materials dispersed in non-conductive inorganic materials, circuits, photovoltaic power generation, etc. The effect of increasing the contact area
Active Publication Date: 2013-12-11
DEXERIALS CORP
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Problems solved by technology
[0007] However, since the connection process at a high temperature of about 260°C is performed during soldering, warpage of the solar cell, internal stress generated at the connection between the lead wire and the front electrode and the back electrode, and flux (flux) There is concern that the reliability of the connection between the surface electrode and the back electrode of the solar cell and the tab wire will be reduced.
Method used
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[0078] Next, examples of the present invention will be described. In the examples, as shown in Table 1, four types of conductive adhesive films containing Ni or not containing conductive particles having different average particle diameters D were used as the conductive adhesive. In addition, as the tab wire, various tab wires in which the average heights of the convex portions 18 a of the uneven portion 18 are different or in which no uneven portion is provided are used. Such as Figure 9 and Figure 10 As shown, glass substrate 31 (thickness: 2.8mm, shape: 64mm×28mm, resistance value: 7mΩ / □(mΩ / sq)) with Ag electrode 30 formed on the entire surface via sample 41 of each conductive adhesive film Each of the Ag electrodes 30 was hot-pressed and connected to two samples 40 of each tab wire.
[0079] All the hot press conditions were 180° C., 15 sec, and 2 MPa. In addition, silicon rubber (silicon rubber) having a thickness of 200 μm was interposed between the joint wire and ...
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Abstract
The present invention improves connection reliability when using a conductive adhesive to connect a tab wire and an electrode of a solar cell. The invention is provided with: a plurality of solar cells (2); and tab wires (3) that are connected via a conductive adhesive (17) including spherical conductive particles (23) to electrodes (11, 13) that are respectively formed on the front surfaces of the solar cells (2) and the back surfaces of adjacent solar cells (2) to connect pairs of solar cells (2). One surface of each tab wire (3) in contact with the conductive adhesive (17) has a rough section (18) formed thereon, wherein an average height (H) of the rough section (18) and an average particle diameter (D) of the conductive particles satisfy D>=H.
Description
technical field [0001] The present invention relates to a solar battery module in which a plurality of solar battery cells are connected by a tab wire, and particularly relates to a tab wire connected to an electrode of a solar battery cell via a conductive adhesive containing conductive particles. A solar cell module of a connector wire and a method for manufacturing the solar cell module. [0002] This application claims priority based on Japanese Patent Application No. Japanese Patent Application No. 2011-64797 for which it applied in Japan on March 23, 2011, and this application is incorporated in this application by reference. Background technique [0003] For example, in a crystalline silicon-based solar cell module, a plurality of adjacent solar cells are connected by a tab wire serving as an interconnector. The tab wires connect the solar cells in series by connecting one end thereof to the surface electrode of one solar cell and connecting the other end to the back...
Claims
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Login to View More IPC IPC(8): H01L31/05H01L31/02H01L31/18
CPCC09J9/02H01B1/22H01L31/022425H01L31/0508H01L31/0512H01L31/18Y02E10/50H01L31/05
Inventor 须贺保博岸本聪一郎
Owner DEXERIALS CORP