Systems, circuits, and methods for generating a solar cell string of an adaptive solar power system

• US 8,872,083 B2
• Filed: 12/15/2010
• Issued: 10/28/2014
• Est. Priority Date: 12/16/2009
• Status: Active Grant

• Current Assignee: Saful Consulting, Inc.
• Original Assignee: Saful Consulting, Inc.
• Inventors: Cherukupalli, Nagendra Srinivas
• Primary Examiner(s): LEE, JOHN R
• Application Number:
  US12/969,422
• Publication Number:
  US 20110140532A1
• Time in Patent Office: 1,413 Days
• Field of Search: 250/203.2, 250/203.4, 250/214.R, 250/214.SW, 323/906, 307/77, 136/244, 136/252, 136/290, 136/291, 136/292, 136/293
• US Class Current: 250/203.4
• CPC Class Codes: G01R 19/16576 comparing DC or AC voltage with one threshold G01R19/16514, G01R19/16519, G01R19/16528, G01R19/16533 and G01R19/1659 take precedence
• CPC Class Codes: G01R 31/26 Testing of individual semiconductor devices testing or measuring during manufacture or treatment H01L22/00; testing of photovoltaic devices H02S50/10
• CPC Class Codes: H01L 31/02021 for solar cells electrical connection means, e.g. junction boxes, specially adapted for structural association with photovoltaic modules H02S40/34
• CPC Class Codes: H01L 31/049 Protective back sheets
• CPC Class Codes: H01L 31/0504 specially adapted for series or parallel connection of solar cells in a module
• CPC Class Codes: H01L 31/0508 the interconnection means having a particular shape
• CPC Class Codes: H01L 31/0512 made of a particular material or composition of materials
• CPC Class Codes: H01L 31/0516 specially adapted for interconnection of back-contact solar cells
• CPC Class Codes: H01L 31/1876 Particular processes or apparatus for batch treatment of the devices
• CPC Class Codes: H02S 30/10 Frame structures
• CPC Class Codes: H02S 40/10 Cleaning arrangements
• CPC Class Codes: H02S 40/32 comprising DC/AC inverter means associated with the PV module itself, e.g. AC 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: H02S 40/36 characterised by special electrical interconnection means between two or more PV modules, e.g. electrical module-to-module connection
• CPC Class Codes: H02S 50/00 Monitoring or testing of PV systems, e.g. load balancing or fault identification
• CPC Class Codes: H02S 50/10 Testing of PV devices, e.g. of PV modules or single PV cells testing of semiconductor devices during manufacturing H01L22/00
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy
• CPC Class Codes: Y10S 136/293 Circuits
• CPC Class Codes: Y10S 323/906 Solar cell systems
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

A back sheet comprises an interconnect circuit coupling a plurality of solar cell tiles. A tiled solar cell, comprising a solar cell and encapsulating and glass layers, is inserted into the solar cell tiles. Each solar cell is individually addressable through the use of the interconnect circuit, The interconnect circuit is programmable and allows for dynamic interconnect routing between solar cells. As such, the dynamic interconnect routing may be configured so as to create strings of solar cells such that solar cells with an output specification are matched to solar cells with similar output specifications.

Claims

1. A system for configuring and re-configuring solar cells, the system comprising:

an interconnect circuit, on a back sheet, comprising programmable circuit routes for interconnecting a plurality of solar cells on the back sheet, wherein the solar cells are arranged in a plurality of rows and a plurality of columns and wherein the interconnect circuit is programmable to connect any one of the solar cells from any row and column to any other of the solar cells from any row and column to generate at least one solar cell string, wherein a solar cell string comprises a plurality of operable solar cells coupled in series; and

a control circuit, coupled to the interconnect circuit, for;

receiving output measurements for each of the solar cells;

grouping, based on the output measurements, the solar cells into a plurality of groups; and

configuring the programmable circuit routes to create a plurality of solar cell strings, one for each of the groups of solar cells.

2. The system as set forth in claim 1, wherein the output measurements for each of the solar cells comprises a voltage output for each of the solar cells.

3. The system as set forth in claim 1, wherein the grouping based on output measurements comprises grouping solar cells with similar output measurements into a single group.

4. The system as set forth in claim 3, the control circuit further comprising determining a distance between solar cells of the single group.

5. The system as set forth in claim 4, the control circuit further comprising:

processing, by using the distance between solar cells of the single group, an energy loss from routes between solar cells.

6. The system as set forth in claim 5, the control circuit further comprising removing a solar cell from the single group if the energy loss exceeds a threshold.

7. The system as set forth in claim 1, wherein an output of each solar cell string is directed to a separate bus line by the programmable circuit routes.

8. A method for configuring and re-configuring solar cells on a back sheet, the method comprising:

interconnecting, by programmable circuit routes, a plurality of solar cells on the back sheet, wherein the solar cells are arranged in a plurality of rows and a plurality of columns and wherein the interconnect circuit is programmable to connect any one of the solar cells from any row and column to any other of the solar cells from any row and column to generate at least one solar cell string, wherein a solar cell string comprises a plurality of operable solar cells coupled in series;

receiving output measurements for the solar cells;

grouping, based on the output measurements, the solar cells into a plurality of groups; and

configuring the programmable circuit routes to create a plurality of solar cell strings, one for each of the groups of solar cells.

9. The method as set forth in claim 8, wherein the output measurements for the solar cells comprise a voltage output.

10. The method as set forth in claim 8, wherein the grouping based on output measurements comprises grouping solar cells of similar output measurements into a single group.

11. The method as set forth in claim 10, further comprising determining a distance between solar cells of the single group.

12. The method as set forth in claim 11, further comprising processing, by using the distance between solar cells of the single group, an energy loss from routes between solar cells.

13. The method as set forth in claim 12, further comprising removing a solar cell from the single group if the energy loss exceeds a threshold.

14. The method as set forth in claim 8, wherein an output of each solar cell string is directed to a separate bus line by the programmable circuit routes.

15. A system for configuring and re-configuring solar cells, the system comprising:

an interconnect circuit comprising programmable circuit routes for interconnecting a plurality of solar cells, wherein the solar cells are arranged in a plurality of rows and a plurality of columns and wherein the interconnect circuit is programmable to connect any one of the solar cells from any row and column to any other of the solar cells from any row and column to generate at least one solar cell string, wherein a solar cell string comprises a plurality of operable solar cells coupled in series; and

a control circuit, coupled to the interconnect circuit, for controlling the programmable circuit routes so as to create a first solar cell string and a second solar cell string, the first solar cell string comprises solar cells with outputs that meet a specification, the second solar cell string comprises solar cells that do not meet the specification.

16. The system as set forth in claim 15, wherein the specification comprises a current and voltage (IV) characteristic.

17. The system as set forth in claim 15, wherein the output of the first solar cell string is coupled to a bus line, the output of the second solar cell string is coupled to a parallel bus line.

18. The system as set forth in claim 15, further comprising a circuit for calculating a distance between solar cells of each solar cell string.

19. The system as set forth in claim 18, wherein the distance between solar cells is used to calculate an energy transmission loss for the programmable circuit routes between the solar cells.

20. The system as set forth in claim 19, wherein a solar cell is removed from the solar cell string if the energy transmission loss is above a defined threshold.