Patent
Solar cell module and method for its production
| العنوان: | Solar cell module and method for its production |
|---|---|
| Patent Number: | 8,217,257 |
| تاريخ النشر: | July 10, 2012 |
| Appl. No: | 11/997189 |
| Application Filed: | July 28, 2006 |
| مستخلص: | A solar cell module and a method for the production thereof, are used in particular in the field of concentrating solar technology. The solar cell module has a large number of two-dimensionally disposed solar cells. These solar cells are applied on a substrate which is coated with a metal layer on the surface orientated towards the solar cells. The metal layer is thereby structured in such a manner that it is subdivided into individual two-dimensional portions which are assigned respectively to one solar cell. The metal layer in each of the portions has two regions which are electrically insulated from each other, the first region extending under the assigned solar cell and contacting the latter in an electrically conductive manner. The second region is likewise connected to the other electrical contact of the solar cell. In order to produce a parallel and series circuit of the individual solar cells, the individual portions of the metal layer are now connected to each other in a suitable manner by means of connecting portions which, for their part, are part of the metal layer. |
| Inventors: | Jaus, Joachim (Freiburg, DE); Bett, Andreas (Freiburg, DE); Boesch, Armin (Ehrenklrchen, DE); Dimroth, Frank (Freiburg, DE); Lerchenmueller, Hansjoerg (Freiburg, DE) |
| Assignees: | Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung E.V. (DE) |
| Claim: | 1. A solar cell module for concentrating solar systems, the solar cell module comprising: a plurality of solar cells disposed in a plane on a planar substrate, the solar cells having, on the substrate side, a first electrical contact, and, on the side orientated away from the substrate, at least one second electrical contact, wherein the substrate is coated on the surface orientated towards the solar cells two-dimensionally with a metal layer, and the metal layer has: a) a plurality of planar portions which are assigned respectively to one solar cell, each portion of the metal layer having a first and at least a second region, the metal layer including grooves configured to produce the first and second regions and configured to electrically insulate the first and second regions from each other and the first region extending under the assigned solar cell and contacting the first contact in an electrically conductive manner, and the second region being connected to the second contact of the solar cell in an electrically conductive manner, and the second region having at least one contact finger, the at least one contact finger extending radially towards the solar cell and b) connecting portions between regions of adjacent portions. |
| Claim: | 2. The solar cell module according to claim 1 , wherein the grooves have a maximum width selected from the group including less than 1 mm, less than 0.5 mm, and less than 01 mm. |
| Claim: | 3. The solar module according to claim 2 , wherein the connecting portions have compensation structures for compensating for material stresses between the substrate and the metal layer. |
| Claim: | 4. The solar module according to claim 1 , the connecting portions have meandering or interleaved T-structures at least partially between the regions to be connected. |
| Claim: | 5. The solar module according to one claim 1 , wherein the connecting portions respectively connect a first region of a portion to respectively a first region of one or more adjacent portions. |
| Claim: | 6. The solar module according to claim 1 , wherein the connecting portions respectively connect a first region of a portion to at least one second portion of an adjacent portion. |
| Claim: | 7. The solar module according to claim 1 , wherein the metal layer covers a percentage of the surface of the substrate selected from the group including greater than 50% greater than 80%, greater than 90%, and greater than 95%. |
| Claim: | 8. The solar cell module according to claim 1 , wherein the metal layer covers the substrate completely, with the exception of a circumferential edge of at least one of the substrate and the grooves. |
| Claim: | 9. The solar cell module according to claim 1 , wherein the metal layer comprises at least one of copper, aluminum, an aluminum alloy and a copper foil. |
| Claim: | 10. The solar cell module according to claim 1 , wherein the metal layer comprises a copper foil with a thickness selected from the group including above 0.01 mm and less than 3 mm, above 35 μm and less than 900 μm, above 70 μm and less than 500 μm at least in regions. |
| Claim: | 11. The solar cell module according to claim 1 , wherein the metal layer is laminated onto the substrate. |
| Claim: | 12. The solar cell module according to claim 1 , wherein the substrate is made of glass or glass fibre composite material at least in regions. |
| Claim: | 13. The solar cell module according to claim 1 , wherein protective diodes, are disposed on the substrate. |
| Claim: | 14. The solar cell module according to claim 1 , wherein the metal layer has electrical line structures, including at least one of data lines, in lines, and out lines to further electrical components disposed on the substrate. |
| Claim: | 15. The solar cell module according to claim 1 , wherein the metal layer has at least one of positioning markings and punch marks. |
| Claim: | 16. The solar cell module according to wherein light collecting devices, at a spacing from the surface of the substrate, are disposed such a that a solar cell is disposed at the focal point of each light collecting device. |
| Claim: | 17. The solar cell module according to claim 16 , wherein the light collecting device comprises a collimator lens. |
| Claim: | 18. The solar cell module according to claim 16 , wherein the light collecting device contains a Fresnel lens. |
| Claim: | 19. The solar cell module according to claim 1 , wherein the first region contacting a solar cell forms a continuous metal surface which extends on at least one side of the solar cell at an opening angle, wherein the opening angle is at least one of greater than 30°, greater than 45°, greater than 90°, and greater than 120°, viewed from the position of the solar cell. |
| Claim: | 20. The solar cell module according to claim 1 , wherein the at least one contact finger of the second region extends at an opening angle selected from the group consisting of less than 30° and less than 10°, viewed from the position of the solar cell. |
| Claim: | 21. The solar cell .module according to claim 1 , wherein the at least one contact finger of the second region has, at least on its end orientated towards the solar cell or at least in a section along the finger having a length of at least 5 mm, at least a width of < one of less than 2 mm and less than 1 mm. |
| Claim: | 22. A method for the production of a solar cell module and comprising the steps of: coating a surface of a planar substrate with a metal layer, structuring the metal layer at least one of before and after the coating step in order to form a plurality of planar portions and first and second regions of the portions, and disposing a solar cell with a first electrical contact in electrical contact with the metal layer for each portion at predetermined positions on the metal layer and connecting the second region to a second electrical contact of the solar cell for each portion; thereby providing the solar cell module of claim 1 . |
| Claim: | 23. The method according to claim 22 , further comprising the step of producing grooves in the metal layer for structuring the metal layer. |
| Claim: | 24. The method according to claim 22 , wherein the structuring of the metal layer is effected by at least one of photolithographic etching, punching and laser cutting. |
| Claim: | 25. The method according to claim 22 wherein the step of structuring the metal layer before the coating the step includes steps of: coating the surface with the metal layer between the individual regions or portions at predetermined positions, to form connecting webs between adjacent regions or portions as punch markings and severing the connecting webs after coating of the surface of the substrate with the metal layer. |
| Claim: | 26. The method according to claim 22 , further comprising the steps of structuring position markings into the metal layer and the solar cell and positioning electronic components taking into account the position markings. |
| Current U.S. Class: | 136/244 |
| Patent References Cited: | 4019924 April 1977 Kurth 4131755 December 1978 Keeling et al. 4173820 November 1979 Mueller et al. 4191593 March 1980 Cacheux 4337759 July 1982 Popovich et al. 4354115 October 1982 Warabisako et al. 4536607 August 1985 Wiesmann 4746371 May 1988 McLeod et al. 4776893 October 1988 McLeod et al. 4834805 May 1989 Erbert 4836861 June 1989 Peltzer 4892593 January 1990 Lew 5091018 February 1992 Fraas et al. 5118361 June 1992 Fraas et al. 5344497 September 1994 Fraas et al. 5430616 July 1995 Katsu et al. 6248949 June 2001 Turner 6353175 March 2002 Fraas 3520423 November 1986 0657948 June 1995 91/18419 November 1991 9118419 November 1991 |
| Other References: | Definition of radial Office Action dated Nov. 17, 2008 from corresponding Chinese Application No. 200680027507.X. cited by other Korean Patent Office Action dated Jan. 13, 2012 from the parallel Korean Application No. 10-2008-7002490. cited by other International Search Report dated Oct. 20, 2006. cited by other |
| Assistant Examiner: | Bourke, Allison |
| Primary Examiner: | Ridley, Basia |
| Attorney, Agent or Firm: | Young Basile |
| رقم الانضمام: | edspgr.08217257 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |