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US4746618A
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Method of continuously forming an array of photovoltaic cells electrically connected in series
Assignee: United Solar Systems Corp
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Filing: 1987-08-31
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Granted: 1988-05-24
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Expires: 2007-08-31
Abstract
Abstract A method of continuously electrically interconnecting in series a plurality of smaller area photovoltaic cells from a continuous, elongated web of photovoltaic cell material which is maintained in continual motion.
Inventors
- 👤 Prem Nath
- 👤 Timothy Barnard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:08
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/10; H10F77/16; H10F77/169; H10F77/1692; H10F19/00; H10F19/30; H10F19/31; H10F19/33; H10F19/80; H10F71/00; H10F71/10; H10F71/107; H10F77/1698; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
190 words
A method of continuously electrically interconnecting in series a continually moving array of discrete photovoltaic cells formed from a single large area photovoltaic cell, said method including the steps of: providing an elongated, continuous web of photovoltaic cell material, said continuous web comprising a continuous substrate upon which a plurality of continuous thin film layers of semiconductor alloy material are disposed; continuously moving said photovoltaic cell material to a take-up station; forming n slits, where n is an integer equal to or greater than 1, photovoltaic cell material for dividing said material into n+1 smaller area cells; each said slit extending through the semiconductor alloy material and the substrate and being of a length selected to include a non-slitted connector between each terminus of said slit and the edge of said cell proximate thereto so that said connectors are adapted to maintain the structural integrity of said elongated web; establishing electrical series communication between adjacent smaller area cells disposed on opposite sides of said slit; and severing said connectors, whereby said continuous web of photovoltaic cell material is converted into an array of discrete photovoltaic cells electrically interconnected in series.
Claim 2
Independent Claim
190 words
A method of continuously electrically interconnecting in series a continually moving array of discrete photovoltaic cells formed from a single large area photovoltaic cell, said method including the steps of: providing an elongated, continuous web of photovoltaic cell material, said continuous web comprising a continuous substrate upon which a plurality of continuous thin film layers of semiconductor alloy material are disposed; continuously moving said photovoltaic cell material to a take-up station; forming n slits, where n is an integer equal to or greater than 1, photovoltaic cell material for dividing said material into n+1 smaller area cells; each said slit extending through the semiconductor alloy material and the substrate and being of a length selected to include a non-slitted connector between each terminus of said slit and the edge of said cell proximate thereto so that said connectors are adapted to maintain the structural integrity of said elongated web; establishing electrical series communication between adjacent smaller area cells disposed on opposite sides of said slit; and severing said connectors, whereby said continuous web of photovoltaic cell material is converted into an array of discrete photovoltaic cells electrically interconnected in series.
Claim 3
Dependent Claim
34 words
A method as in claim 1, including the further step of electrically isolating a minor portion of the surface of each discrete cell from a major portion of the surface of each discrete cell.
Claim 4
Dependent Claim
22 words
A method as in claim 2, wherein said step of electrically isolating comprises forming grooves through the layers of semiconductor alloy material.
Claim 5
Dependent Claim
23 words
A method as in claim 2, wherein said step of electrically isolating comprises removing the layers of semiconductor alloy material from the substrate.
Claim 6
Dependent Claim
24 words
A method as in claim 2, including the further step of insulating the slits so that adjacent cells are electrically isolated from one another.
Claim 7
Dependent Claim
39 words
A method as in claim 5, wherein the step of isolating adjacent cells comprises laminating the back surface of the substrate with an electrically insulating material; and insulating the slitted space between adjacent cells with an electrically insulating material.
Claim 8
Dependent Claim
46 words
A method as in claim 5, wherein the step of isolating adjacent cells comprises: utilizing an electrically insulating substrate and depositing a common layer of electrically conductive material prior to slitting said cells; and insulating the slitted space between adjacent cells with an electrically insulating material.
Claim 9
Dependent Claim
19 words
A method as in claim 6, including the further step of electrically interconnecting adjacent cells across said insulated slit.
Claim 10
Dependent Claim
71 words
A method as in claim 8, wherein the step of interconnecting cells across said slit comprises forming a plurality of electrically conductive grid lines, which lines extend from said major portion of said surface of one discrete cell to said minor portion of said surface of said adjacent discrete cell, whereby the upper surface of said one cell is electrically connected in series to the lower surface of said adjacent cell.
Claim 11
Dependent Claim
28 words
A method as in claim 8, including the further step of electrically interconnecting in series a plurality of discrete cells so as to obtain a desired voltage therefrom.
Claim 12
Dependent Claim
24 words
A method as in claim 10, including the further step of encapsulating the the upper surface of said cells with an electrically insulating material.
Claim 13
Dependent Claim
79 words
An improved method of electrically connecting in series an array of smaller area photovoltaic cells formed from a continuous elongated web of photovoltaic cell material, said web formed from continuous layers of semiconductor alloy material deposited onto an elongated web of substrate material; said method including the steps of: forming a plurality of discrete smaller area photovoltaic cells from said web of cell material; and electrically interconnecting said discrete cells in series while maintaining said web in continuous motion.
Claim 14
Dependent Claim
79 words
An improved method of electrically connecting in series an array of smaller area photovoltaic cells formed from a continuous elongated web of photovoltaic cell material, said web formed from continuous layers of semiconductor alloy material deposited onto an elongated web of substrate material; said method including the steps of: forming a plurality of discrete smaller area photovoltaic cells from said web of cell material; and electrically interconnecting said discrete cells in series while maintaining said web in continuous motion.
Claim 15
Dependent Claim
60 words
A method as in claim 12, including the further step of forming at least one slit in said elongated web of cell material, each said slit extending through the semiconductor alloy material and the substrate and being of a length selected to include a non-slitted connector between each terminus of said slit and the edge of said cell proximate thereto.
Claim 16
Dependent Claim
37 words
A method as in claim 13, wherein electrical communication between adjacent discrete cells on opposite sides of said slits is established by filling said slitted space with electrically insulating material and forming electrically conductive grid lines thereacross.
Claim 17
Dependent Claim
24 words
A method as in claim 14, including the further step of laminating both sides of the array of series connected smaller area photovoltaic cells.
References Cited (Backward Citations)
US3977904A
Cited
US4245386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |