Attachment structures for building integrable photovoltaic modules
View Patent ↗Provided are novel building integrable photovoltaic (BIP) modules having specially configured attachment structures for securing these modules to building structures and other BIP modules. In certain embodiments, a BIP module includes a base sheet supporting photovoltaic cells and having a rigid polymer portion and a flexible polymer portion. The flexible portion is designed to be penetrated with mechanical fasteners during installation. The flexible portion may include fastening pointers and/or through holes for identifying specific penetration locations. The rigid portion provides necessary structural rigidity and support to the module and more specifically to the photovoltaic cells. In certain other embodiments, a BIP module includes an adhesive bumper strip disposed along one edge of the module and configured for secure this module with respect to another module. During installation, the strip is positioned between a back sealing sheet of one module and a front sealing sheet of another module.
1. A building integrable photovoltaic assembly comprising:
a first photovoltaic module comprising a first set of photovoltaic cells, a back sealing sheet, a first edge, and a first corner, wherein the first edge and another edge of the first photovoltaic module intersect at the first corner;
a second photovoltaic module comprising a second set of photovoltaic cells, a front sealing sheet, and a second edge;
an adhesive bumper strip positioned in between the first photovoltaic module and the second photovoltaic module along the first edge of the first module and the second edge of the second module securing the first photovoltaic module with respect to the second photovoltaic module, the adhesive bumper strip comprising:
a body comprising a first surface and a second surface;
a first adhesive on the first surface of the body and in contact with the back sealing sheet of the first photovoltaic module;
a second adhesive on the second surface of the body and in contact with the front sealing sheet of the second photovoltaic module; and
a corner protrusion comprising a first part and a second part that intersect to form a corner of the corner protrusion, wherein:
the corner protrusion extends away from the body in a direction away from the first surface,
the body and the corner protrusion are different materials than the first and second adhesives,
the adhesives of the adhesive bumper strip are located only on the first surface and second surface of the body, and
the corner protrusion extends around at least part of the first corner of the first photovoltaic module when the adhesive bumper strip is positioned in between the first photovoltaic module and the second photovoltaic module along the first edge of the first module.
2. The building integrable photovoltaic assembly of claim 1 , wherein the adhesive bumper strip is configured to provide a moisture tight seal between the first photovoltaic module and the second photovoltaic module along the first edge of the first module and the second edge of the second module.
3. The building integrable photovoltaic assembly of claim 1 , wherein the adhesive bumper strip is configured to withstand a pull-out force of at least about 2 pounds per linear inch along the first edge of the first module and the second edge of the second module.
4. The building integrable photovoltaic assembly of claim 1 , wherein the adhesive bumper strip separates the first module and the second module by at least about 3 millimeter along the first edge of the first module and the second edge of the second module.
5. The building integrable photovoltaic assembly of claim 1 , wherein:
the first photovoltaic module further comprises a second corner, wherein the first edge and a third edge of the first photovoltaic module intersect at the second corner,
the body further comprises a second corner protrusion that includes a third part and a fourth part that intersect to form a corner of the second corner protrusion,
the second corner protrusion extends away from the body in a direction away from the first surface,
the second corner protrusion is a different material than the first and second adhesives, and
the second corner protrusion extends around at least part of the second corner of the first photovoltaic module when the adhesive bumper strip is positioned in between the first photovoltaic module and the second photovoltaic module along the first edge of the first module.
6. The building integrable photovoltaic assembly of claim 1 , wherein the second adhesive is on a plurality of flexible tabs that extend away from the body, wherein the distance between portions of the second adhesive and the first adhesive varies.
7. The building integrable photovoltaic assembly of claim 1 , wherein the back sealing sheet of the first photovoltaic module comprises a glass sheet.
8. The building integrable photovoltaic assembly of claim 1 , wherein the front sealing sheet of the second photovoltaic module comprises a glass sealing sheet.
9. The building integrable photovoltaic assembly of claim 1 , wherein the body comprises one or more flexible polymer materials.
10. A building integrable photovoltaic module comprising:
a photovoltaic insert comprising a set of photovoltaic cells, a back sealing sheet, an edge, and a first corner, wherein the edge and another edge of the first photovoltaic insert intersect to form the first corner; and
an adhesive bumper strip attached to the back sealing sheet along the edge, the adhesive bumper strip comprising:
a body comprising a first surface,
an adhesive on the first surface of the body for attaching to a front surface of an adjacent building integrable photovoltaic module,
a corner protrusion comprising a first part and a second part that intersect to form a corner of the corner protrusion, wherein:
the corner protrusion extends away from the body in a direction opposite the first surface,
the body and the corner protrusion are different materials than the adhesive,
the adhesives of the adhesive bumper strip are located only on the first surface and second surface of the body, and
the corner protrusion extends around at least part of the first corner of the first photovoltaic insert when the adhesive bumper strip is attached to the back sealing sheet along the edge.
11. The building integrable photovoltaic assembly of claim 1 , wherein the body is compressible by at least 25% of an initial thickness.
12. The building integrable photovoltaic assembly of claim 1 , wherein the body is compressible by at least 50% of an initial thickness.
13. The building integrable photovoltaic assembly of claim 1 , wherein the body is one of poly(ethylene terephthalate), polycarbonate, polypropylene, polyethylene, polypropylene, a cyclic polyolefin, a norbornene polymer, polystyrene, polystyrene, a styrene-acrylate copolymer, an acrylonitrile-styrene copolymers, poly(ethylene naphthalate), polyethersulfone, polysulfone, a nylon, poly(urethanes), an acrylics, a cellulose acetate, a cellulose triacetate, cellophane, a vinyl chloride polymer, polyvinylidene chloride, a vinylidene chloride copolymer, a fluoropolymer, a polyvinyl fluoride, polyvinylidene fluoride, polytetrafluoroethylene, or an ethylene-tetrafluoroethylene copolymer.
14. The building integrable photovoltaic assembly of claim 10 , wherein the body is compressible by at least 25% of an initial thickness.
15. The building integrable photovoltaic assembly of claim 10 , wherein the body is compressible by at least 50% of an initial thickness.