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Thermoplastic Vulcanizate Compositions for Photovoltaic Cell Applications

A thermoplastic vulcanization, photovoltaic cell technology, applied in the field of products and their manufacture, thermoplastic vulcanized rubber composition

Active Publication Date: 2022-07-22
CELANESE INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such backsheets have not been accepted by the market, and they moreover have adhesion and processing problems during the fabrication of PV modules

Method used

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  • Thermoplastic Vulcanizate Compositions for Photovoltaic Cell Applications
  • Thermoplastic Vulcanizate Compositions for Photovoltaic Cell Applications
  • Thermoplastic Vulcanizate Compositions for Photovoltaic Cell Applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0147] The effect of corona treatment on TPV-formed backsheets was evaluated. First, place the Santoprene TM Thermoplastic vulcanizate 251-70W232 (commercially available from ExxonMobil Chemical Company, Houston, Texas, USA) was formed into three 1.8 cm (width) x 20 cm (height) panels with a thickness of approximately 0.23 mm. The three panels (samples S1, S2 and S3) were corona treated for 0, 1 and 4 minutes travel time respectively (meaning that the respective scan rates were 0, 25 and 6.25 cm / min).

[0148] In order to properly test the adhesion strength of this TPV-based backsheet, a multi-layer test panel had to be formed, which consisted of two layers of conventional backsheet material (Ref_BS, which is ICOSOLAR). TM 2442, Three-Layer Composite (TEDLAR TM / PET / TEDLAR TM , white on the daylight side and black on the opposite side), available from Isovoltaic AG, Austria. TEDLAR TM is PVF film available from DuPont Corporation, and PET is polyethylene terephthalate. M...

Embodiment 2

[0151] Backsheets formed from five different materials were investigated for their adhesion to EVA encapsulant under different temperature conditions, both before and after the damp heat test. The five types of backplanes tested were marked based on their materials of construction, as shown in Table 1 below:

[0152] Table 1. Example 2 Backsheets for Adhesion Testing

[0153] Sample marking Backplane material thickness REF_BS ICOSOLAR TM 2442

0.36mm TPV_BS1 SANtopRENE TM TPV251-70W232

0.23mm TPV_BS2 SANtopRENE TM TPV101-55

0.30mm TPV_BS3 SANtopRENE TM TPV101-80

0.29mm TPV_BS4 SANtopRENE TM TPV251-80W232

0.28mm

[0154] ICOSOLAR TM 2442 is as previously described in Example 1.

[0155] SANTOPRENE TM TPV251-70W 232 is a flame retardant, white tinted grade thermoplastic vulcanizate available from ExxonMobil Chemical Company containing crosslinked EPDM particles dispersed in a thermoplastic (poly...

Embodiment 3

[0167] 6 mini PV modules (20cm x 40cm) were fabricated, each containing 2 PV cells connected in series (Sunwaysmono c-Si solar cells) with a uniform aluminum paste coating on the back side of the cells, and the coated cells Further encapsulated in EVA (PHOTOCAP TM 15580P) with a glass front (solar grade float glass, 3mm thick). The backplane material for each sample mini-module is shown in Table 2 below. The module was fabricated by heating lamination at 160°C for 10 minutes.

[0168] Table 2. Example 3 Mini PV Module Backplane

[0169] Sample serial number Backplane material Backplane thickness PV1 SANtopRENE TM TPV251-70W232

[0170] All 6 mini-modules were exposed to D-H conditions for 3000h in a climatic chamber according to the IEC 61215 protocol (except that, as stated, 3000h exposure was used instead of the 1000h required by the protocol).

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Abstract

Provided herein are backsheets comprising and / or made from thermoplastic vulcanizates, PV modules comprising such TPV-based backsheets, and methods of forming the TPV backsheets and PV modules. TPV-based backsheets offer particular advantages over existing backsheets, including increased flexibility, greater electrical insulating properties, and more desirable barrier properties. The TPV-based backsheets of some embodiments provide PV modules with improved durability, especially under the changing and often harsh environmental conditions in which PV modules are often deployed. The TPV-based backsheets of some embodiments are also capable of efficiently constructing unusual PV module geometries, such as non-planar (eg, curved and / or hinged) geometries.

Description

[0001] Relevant case file statement [0002] This application claims the benefit of Serial No. 62 / 315329, filed March 30, 2016, entitled "Thermoplastic Vulcanizate Compositions for Photovoltaic Cell Applications", and European Application No. 16170982.9, filed May 24, 2016. This application is also related to US Provisional Application Serial No. 62 / 315337, filed March 30, 2016, entitled "Photovoltaic Module Back Sheets Comprising Thermoplastic Vulcanizate Compositions." [0003] Field of Invention [0004] The present disclosure relates to photovoltaic devices, such as photovoltaic cell modules. In particular, the present disclosure relates to thermoplastic vulcanizate compositions, articles, and methods of manufacture thereof, which may be used in such photovoltaic devices, for example, as backsheets and / or encapsulation materials in photovoltaic cell modules. [0005] Background of the Invention [0006] Photovoltaic (PV) modules typically include PV cells for converting s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/048H01L31/049C09D123/08C09D123/16
CPCH01L31/048H01L31/0481H01L31/049Y02E10/50C09D123/0853C09D123/16
Inventor J·G·弗伦德里格V·A·皮尔梅兹U·L·R·尼尔森
Owner CELANESE INT CORP