BACK SIDE PROTECTIVE SHEET FOR SOLAR CELL AND SOLAR CELL MODULE COMPRISING THE SAME

• US 20100089445A1
• Filed: 02/15/2008
• Published: 04/15/2010
• Est. Priority Date: 02/27/2007
• Status: Active Grant

• Current Assignee: Toyo Aluminium Kabushiki Kaisha (Nippon Light Metal Holdings Co., Ltd.)
• Original Assignee: Toyo Aluminium Kabushiki Kaisha (Nippon Light Metal Holdings Co., Ltd.)
• Inventors: Sakamoto, Hiroyuki, Hosaka, Makoto, Yasukawa, Hidenori, Watanabe, Masateru
• Granted Patent: US 9,362,434 B2
• Time in Patent Office: Days
• US Class Current: 136/256
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10788 containing ethylene vinylacetate
• CPC Class Codes: B32B 2250/02 2 layers
• CPC Class Codes: B32B 2250/246 All polymers belonging to those covered by groups B32B27/32 and B32B27/30
• CPC Class Codes: B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2307/712 Weather resistant
• CPC Class Codes: B32B 2307/72 Density
• CPC Class Codes: B32B 2457/12 Photovoltaic modules
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/308 comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 27/16 Homopolymers or copolymers or vinylidene fluoride
• CPC Class Codes: C08L 33/12 Homopolymers or copolymers of methyl methacrylate
• CPC Class Codes: H01L 31/048 Encapsulation of modules
• CPC Class Codes: H01L 31/049 Protective back sheets
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

Provided are a back side protective sheet for a solar cell, which is capable of enhancing performance of adhesion to an EVA resin as a filler used to seal the solar cell elements, of maintaining weather resistance for a long period of time, and of reducing a weight thereof; and a solar cell module including the back side protective sheet for a solar cell. The back side protective sheet (10) for a solar cell is disposed on a back side of the solar cell module (100) and includes: a first film (11) fixedly attached so as to abut a surface of a filler (7) and containing linear low-density polyethylene having a density greater than or equal to 0.91 g/cm³ and less than or equal to 0.93 g/cm³; and a second film (12) laminated on the first film (11) and disposed in an outermost layer of the back side protective sheet (10) for a solar cell, the second film (12) containing polyvinylidene fluoride and polymethyl methacrylate.

Claims

1. A back side protective sheet (10) for a solar cell, the back side protective sheet (10) disposed on a back side of a solar cell module, comprising:

a first film (11) containing linear low-density polyethylene having a density greater than or equal to 0.91 g/cm³ and less than or equal to 0.93 g/cm³; and

a second film(12) containing polyvinylidene fluoride and polymethyl methacrylate and laminated on the first film (11).

2. A solar cell module (100) comprising:

a filler (7) disposed to seal solar cell elements and made of an ethylene-vinyl acetate copolymer resin and; and

a back side protective sheet (10) for a solar cell, the back side protective sheet (10) fixedly attached on an outer surface of the filler on a back side of the solar cell module,

wherein the back side protective sheet (10) for a solar cell includes;

a first film (11) fixedly attached so as to abut a surface of the filler (7) and containing linear low-density polyethylene having a density greater than or equal to 0.91 g/cm³ and less than or equal to 0.93 g/cm³; and

a second film (12) laminated on the first film (11) and disposed in an outermost layer of the back side protective sheet (10) for a solar cell, the second film (12) containing polyvinylidene fluoride and polymethyl methacrylate.