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Connecting Material, Solar Cell Connecting Material, Solar Cell Module And Method For Manufacturing Same

A solar cell and connection material technology, applied in the direction of final product manufacturing, conductive adhesive connection, sustainable manufacturing/processing, etc., can solve problems such as cracking and warping of solar cell units, and achieve resistance rise suppression and connection reliability excellent effect

Active Publication Date: 2014-12-31
HITACHI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when solder that does not contain lead (Pb) is used, a thermocompression bonding temperature of about 240°C is required, and stress occurs between the solar cell and the tab wire.
In the case of thin-film silicon wafers, warpage, cracking, etc. of the solar cells may occur especially due to the influence of thermal stress

Method used

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  • Connecting Material, Solar Cell Connecting Material, Solar Cell Module And Method For Manufacturing Same
  • Connecting Material, Solar Cell Connecting Material, Solar Cell Module And Method For Manufacturing Same
  • Connecting Material, Solar Cell Connecting Material, Solar Cell Module And Method For Manufacturing Same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0123] The present invention will be further described in detail based on examples and comparative examples below, but the present invention is not limited to these examples.

[0124] [Resistance value evaluation method A]

[0125] The following is based on image 3 (a) and (b) The evaluation method of the resistance value of the connection material manufactured in the Example is demonstrated.

[0126]The connection material was bonded to the Ag electrode of the 5-inch solar battery cell 20 on which the Ag electrode (bus bar electrode 3 a ) was formed on the surface using a laminator. Next, the polyethylene as the supporting film was peeled off from the connecting material, and the tab wires (wiring member 4 ) cut into 5 mm were bonded as a single sheet at 5 mm intervals, and crimped under the following crimping conditions. Among them, the both ends of the Ag electrode on the solar battery cell 20 are tab wires cut to 15 mm. The resistance value of the sample thus obtained ...

Synthetic example 1A～6A

[0132] [Synthesis Examples 1A to 6A: Synthesis of Acrylic Resin]

[0133] Synthesis examples of acrylic resins are shown below. Synthesis was performed under the same conditions except for changing the amount of monomers used and the type of monomers. A summary of the materials used is collectively shown in Table 1A. In addition, the amounts and types of monomers used for the acrylic resins obtained in Synthesis Examples 1A to 6A, and resin properties are shown in Table 2A.

[0134] [Table 1A]

[0135]

material name

solvent

methyl ethyl ketone

(First)

Monomer

(Second)

polymerization initiator

(C)

2-methacryloxyethyl isocyanate (MOI)

[0136] (Synthesis of matrix resin)

[0137] The monomer (A) shown in Table 1A and methyl ethyl ketone (MEK) were added to a 1 L beaker and mixed. After confirming that the copolymerized monomers are sufficiently compatible, a predetermined amount of azobisisobutyronitrile wa...

Embodiment 1A

[0157] As shown in Table 3A, 30 parts by mass of the acrylic resin obtained in the above Synthesis Example 1A as (A) acrylic resin, 30 parts by mass of isocyanuric acid EO-modified acrylate as (B) polymerizable compound, dihydroxy 5 parts by mass of methyltricyclodecane diacrylate, 10 parts by mass of BPA type epoxy diacrylate, 5 parts by mass of PEROYL L as (C) polymerization initiator, (D) conductive particles with an average particle diameter of 5 μm 10 parts by mass of Ni particles and 30 parts by mass of urethane acrylate resin as other components were mixed. This mixed solution was applied onto a PET film as a support film using an applicator, and dried in a dryer at 70° C. for 3 minutes to obtain a film-shaped connection material (conductive adhesive film) having a thickness of 25 μm. The connection reliability evaluation was performed on the obtained connection material according to the above-mentioned [connection reliability evaluation method A]. The results are show...

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Abstract

The present invention provides a connecting material, a solar cell connecting material, a solar cell module and a method for manufacturing the same. The connecting material contains an acrylic resin (A), a polymerized compound (B) and a polymerization initiator (C), and the acrylic resin (A) possesses a structure unit of an ethylene unsaturated group at a side chain.

Description

technical field [0001] The present invention relates to a connection material, a solar cell connection material, a solar cell module, and a manufacturing method thereof. Background technique [0002] In recent years, solar cells capable of directly converting light from the sun, which is a clean and inexhaustible energy source, into electricity have attracted attention as environmentally friendly new energy sources. The average output of one solar battery cell is only a few W at most, but by connecting a plurality of solar battery cells in series, the output can be increased to 100 W or more. Therefore, solar battery cells are generally used as a solar battery module in which a plurality of cells are connected in series. The solar battery module has a structure in which electrodes formed on a plurality of solar battery cells are electrically connected to each other through a wiring member (tab wire) made of a metal conductive material. [0003] Conventionally, as the tab w...

Claims

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Application Information

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IPC IPC(8): C09J4/02C09J4/06C09J9/02C09J7/00H01R4/04H01L31/05H01L31/18
CPCY02E10/50Y02P70/50
Inventor 春原圣司竹村贤三堀内猛松川礼欧井上和歌清水千晶浅川雄介
Owner HITACHI CHEM CO LTD
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