Method of fabricating photovoltaic module

• US 5,008,062 A
• Filed: 03/02/1989
• Issued: 04/16/1991
• Est. Priority Date: 01/20/1988
• Status: Expired due to Fees

• Current Assignee: Siemens Solar Industries L.P. (Siemens AG)
• Original Assignee: Siemens Solar Industries L.P. (Siemens AG)
• Inventors: Anderson, A. Jerome, Beze, Norman L.
• Primary Examiner(s): Lowe, James
• Application Number:
  US07/318,785
• Time in Patent Office: 775 Days
• Field of Search: 264/1.7, 264/272.15, 264/272.16, 264/272.17, 264/252, 264/275, 264/277, 136/251, 136/259
• US Class Current: 264/272.15
• CPC Class Codes: B29C 45/14336 Coating a portion of the article, e.g. the edge of the article B29C45/14573 and B29C45/14598 take precedence
• CPC Class Codes: B29C 45/14418 Sealing means between mould and article
• CPC Class Codes: B29C 67/246 Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM] casting monomers B29C39/006, mixing construction B29B7/74
• CPC Class Codes: B29K 2709/08 Glass
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10293 Edge features, e.g. inserts or holes
• CPC Class Codes: H01L 31/02008 for solar cells or solar cell modules
• CPC Class Codes: H01L 31/048 Encapsulation of modules
• CPC Class Codes: H02S 40/34 comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

A photovoltaic panel is supported, sealed and isolated from the environment by being encased in a reaction injection molded elastomer which encapsulates the back, sides and a portion of the front side of the photovoltaic panel.

Claims

1. A method for forming an elastomeric casing on a predetermined portion of a thin film photovoltaic panel having front and back sides and edges forming a perimeter, and at least one thin film photovoltaic cell capable of converting radiation incident the front side of the panel to electrical energy, the method comprising the steps of:

placing the thin film photovoltaic panel in a mold having interior walls which cooperate with said predetermined portion of the panel to define a cavity encompassing the perimeter and the back side of the panel; and

introducing a flowable reaction injection molding material into the cavity and curing said material to form a unitary elastomeric casing which encapsulates the entire back side and perimeter edges of the panel and forms a seal against a portion of the front side of the panel bordering the perimeter.

2. The method of claim 1 wherein the panel further includes means for establishing external electrical connection to the at least one thin film photovoltaic cell including an internal portion electrically connected to the at least one cell and an external portion extending from the panel, and wherein the mold includes means for defining a cavity portion which includes at least the internal portion of the connecting means of the panel, and the internal portion is embedded in the cured reaction injection molding material.

3. A method for forming an elastomeric casing on a predetermined portion of a thin film photovoltaic panel having front and back sides and edges forming a perimeter, and at least one thin film photovoltaic cell capable of converting radiation incident the front side of the panel to electrical energy, the method comprising the steps of:

placing the panel in a mold defining a chamber for receiving the panel, the mold chamber having seal means positioned to be adjacent the periphery of the front side of the panel to seal the portion of the panel located interiorly of the seal means against the influx of liquid, surfaces located exteriorly of the seal means which form a casing shaping portion which cooperates with the seal means and the predetermined portion of the panel to define a cavity within the mold chamber, and

introducing the flowable reaction injection molding material into the mold and curing the material to form a unitary elastomeric casing which encapsulates the entire back side and perimeter edges of the panel and forms a seal against a portion of the front side of the panel bordering the perimeter.

4. The method of claim 3 wherein the panel includes means for establishing external electrical connection to the at least one thin film photovoltaic cell including an internal portion electrically connected to the at least one cell and an external portion extending from the panel, and wherein the casing shaping portion comprises means for defining a cavity portion which includes at least the internal portion of the connecting means of the panel, and said internal portion is embedded in the cured reaction injection molding material.

5. A method for forming an elastomeric casing on a predetermined portion of a thin film photovoltaic panel having front and back sides and edges forming a perimeter, and at least one thin film photovoltaic cell capable of converting radiation incident the front side of the panel to electrical energy, the method comprising the steps of:

placing the panel in a mold including (a) two cooperating mold sections defining a chamber for receiving the panel, (b) seal means in one of the mold sections positioned to be adjacent the periphery of the front side of the panel to support the panel within the panel-receiving chamber and seal the portion of the panel located interiorly of the seal means against the influx of fluid, (c) facing surfaces of the mold sections located exteriorly of the seal means, provided with a casing shaping portion which cooperates with the seal means and the predetermined portion of the panel to define a cavity when the mold sections are in contacting relationship, and (d) inlet means for introducing a flowable reaction injection molding material into the cavity when the mold sections are in contacting relationship; and

injecting the flowable reaction injection molding material into the mold and curing the material to form a unitary elastomeric casing which encapsulates the entire back side and perimeter edges of the panel and forms a seal against a portion of the front side of the panel bordering the perimeter.

6. A method for forming an elastomeric casing on a predetermined portion of a thin film photovoltaic panel having front and back sides and edges forming a perimeter, and including (a) a first front sheet having front and back sides, and at least one thin film photovoltaic cell capable of converting radiation incident the front side of the panel to electrical energy, and (b) a second sheet disposed parallel to the first sheet, and adjacent to and spaced from the back side of the first sheet;

the method comprising the steps of;

placing the panel in a mold defining a chamber for receiving the panel, the mold chamber having seal means positioned to be adjacent the periphery of the front side of the panel to seal the portion of the panel located interiorly of the seal means against the influx of liquid, surfaces located exteriorly of the seal means which form a casing shaping portion which cooperates with the seal means and the predetermined portion of the panel to define a cavity within the mold chamber, and

introducing the flowable reaction injection molding material into the mold, the material flowing into the casing shaping portion and between the back side of the first sheet and the second sheet, and curing the material to form a unitary elastomeric casing which is disposed between the back side of the first sheet and the second sheet and forms a seal against a portion of the front side of the panel bordering the perimeter, continuing around the perimeter of the first sheet and sealing against at least a portion of the second sheet.

7. The method of claim 6 wherein the panel includes means for establishing external electrical connection to the at least one thin film photovoltaic cell, including an internal portion electrically connected to the at least one cell and an external portion extending from the panel, and wherein the casing shaping portion comprises means for defining a cavity portion which includes at least the internal portion of the connecting means of the panel, and said internal portion is embedded in the cured reaction injection molding material.