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Conductive Adhesives Containing Elastomer Blends

A conductive adhesive and elastomer technology, applied in conductive adhesives, ester copolymer adhesives, adhesive types, etc., can solve problems such as solar cell deformation and breakage

Active Publication Date: 2017-06-06
SOLAR PASTE LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This thermal stress can lead to deformation and fracture of solar cells

Method used

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  • Conductive Adhesives Containing Elastomer Blends

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] material:

[0047] Ag-1: flake and crystalline silver powder with a particle size of 3-5μm, obtained from Kunming Norman Electronic Materials Co., Ltd., China;

[0048] Ag-2: Silver powder with a particle size of 5.4-11μm, obtained from DuPont;

[0049] Ethylene-vinyl acetate (EVA): ethylene-vinyl acetate copolymer resin (33% by weight of vinyl acetate), obtained by DuPont, trade name PV1650;

[0050] Ethylene / methyl acrylate copolymer (E / MA): an ethylene / acrylate copolymer containing 62% by weight of methyl acrylate, with a Mooney viscosity of 22 (ML1+4, 100°C);

[0051] Peroxide (PO): OO-tert-butylperoxycarbonate O-2-, purchased from China Lanzhou Auxiliary Factory;

[0052] Silane coupling agent (SCA): 3-glycidoxypropyltriethoxysilane, obtained from Shin-Etsu Chemical Co., Ltd., under the trade name KBM403;

[0053] Antioxidant (AO): 2',3-bis[[3-[3,5-di-tert-butyl-4-hydroxyphenyl]propionyl]]hydrazine, obtained from BASF, Germany, trade name Irganox TM MD1024;

[0054] ECA-1: AE...

Embodiment E4

[0078] In E4, a battery module is prepared as follows: (i) Conductive adhesive (ECA) strips (2mm wide, 50μm thick) are prepared on the release film by hot pressing ECA-3 (at 100°C), and then Cut; (ii) Place the front side of the c-Si battery on a hot plate at 100°C, and keep the battery on the hot plate, while covering the two bus bars on the front side of the c-Si battery with ECA strips, Remove the peeling film from the ECA strips, and arrange the Cu strips (2mm wide) with each ECA strip; (iii) Turn over and keep the c-Si battery on the hot plate, and at the same time place the two on the back of the c-Si battery The soldering pad is covered with ECA strips, the peeling film is removed from the ECA strips, and the Cu strips (2mm wide) are aligned with each ECA strip; (iv) The battery is removed from the heating plate and the two front sides are welded The Cu strip is connected with the first Cu strip coated with Sn / Pd and the two backside Cu strips are connected with the seco...

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Abstract

Disclosed herein is a conductive adhesive composition comprising a polymer matrix and about 40-90% by weight conductive particles dispersed in the polymer matrix and its use in a solar cell module , the sum of the wt.% of all components included in the composition is 100 wt.%, wherein the polymer matrix comprises at least one ethylene / (meth)acrylic acid alkyl in a weight ratio of about 10:90-70:30 A blend of an ester copolymer elastomer with or formed from at least one ethylene-vinyl acetate copolymer.

Description

Technical field [0001] The present disclosure relates to conductive adhesives based on blended elastomers. Background technique [0002] In the solar cell module, the solar cell has surface electrodes to which wiring elements (also called conductive interconnection elements or ribbons) are connected to extract energy from the cell. The wiring element is usually in the form of a metal tape (for example, copper tape), and is usually connected to the surface electrode by soldering. However, since soldering requires a higher temperature, stress is applied to the connection structure due to the difference in the coefficient of thermal contraction between the semiconductor structure for generating energy, the surface electrode, the solder, and the wiring element. This thermal stress may cause deformation and fracture of the solar cell. [0003] To solve this problem, it has been suggested to use polymer-based conductive adhesives instead of solder to connect wiring elements and surface...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22C09D123/08C09J9/02H01L31/0224H01L31/05
CPCC09D123/0869C09J9/02H01B1/22H01L31/022425C08L2203/204Y02E10/50C08K3/08C08K5/14C08K7/00H01L31/0512C09J123/0853C09J133/10
Inventor 穆敏芳刘增君
Owner SOLAR PASTE LLC