التفاصيل البيبلوغرافية
| العنوان: |
Solar Cell Module and Method For Its Production |
| Document Number: |
20080230109 |
| تاريخ النشر: |
September 25, 2008 |
| Appl. No: |
11/997189 |
| Application Filed: |
July 07, 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 (Ehrenkirchen, DE); Dimroth, Frank (Freiburg, DE); Lerchenmueller, Hansjoerg (Freiburg, DE) |
| Assignees: |
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. (Munchen, DE) |
| Claim: |
1. Solar cell module for concentrating solar systems with a plurality of solar cells which are 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, characterised in that 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 which are electrically insulated 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 also b) connecting portions between regions of adjacent portions. |
| Claim: |
2. Solar cell module according to claim 1, characterised in that the metal layer is structured by means of grooves in order to produce the first and second regions. |
| Claim: |
3. Solar cell module according to claim 1, characterised in that the grooves have a maximum width selected from the group consisting of less than 1 mm, less than 0.5 mm, and less than 0.1 mm. |
| Claim: |
4. Solar cell module according to claim 3, characterised in that the connecting portions have compensation structures for compensating for material stresses between the substrate and the metal layer. |
| Claim: |
5. Solar cell module according to claim 1, characterised in that the connecting portions have meandering or interleaved T-structures at least partially between the regions to be connected. |
| Claim: |
6. Solar cell module according to one claim 1, characterised in that the connecting portions respectively connect a first region of a portion to respectively a first region of one or more adjacent portions. |
| Claim: |
7. Solar cell module according to claim 1, characterised in that the connecting portions respectively connect a first region of a portion to one or precisely one second portion of an adjacent portion. |
| Claim: |
8. Solar cell module according to claim 1 characterised in that the metal layer covers a percentage of the surface of the substrate selected from the group consisting of greater than 50%, greater than 80% greater than 90%, and greater than 95%. |
| Claim: |
9. Solar cell module according to claim 1 characterised in that the metal layer covers the substrate completely, with the exception of a circumferential edge of at least one of the substrate and the grooves for structuring in the metal layer. |
| Claim: |
10. Solar cell module according to claim 1, characterised in that the metal layer comprises at least one of copper, aluminum, an aluminum alloy and a copper foil. |
| Claim: |
11. Solar cell module according to claim 1, characterised in that the metal layer comprises a copper foil with a thickness selected from the group consisting of 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: |
12. Solar cell module according to claim 1, characterised that the metal layer is laminated onto the substrate. |
| Claim: |
13. Solar cell module according to claim 1, characterised in that the substrate is made of glass or glass fibre composite material at least in regions. |
| Claim: |
14. Solar cell module according to claim 1, characterised in that further electrical components, for example protective diodes, are disposed on the substrate. |
| Claim: |
15. Solar cell module according to claim 1, characterised in that 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: |
16. Solar cell module according to claim 1, characterised in that the metal layer has at least one positioning markings and punch marks. |
| Claim: |
17. Solar cell module according to claim 1, characterised in that light collecting devices, at a spacing from the surface of the substrate, are disposed in such a manner that a solar cell is disposed at the focal point of each light collecting device. |
| Claim: |
18. Solar cell module according to claim 17, characterised in that the light collecting device comprises a collimator lens. |
| Claim: |
19. Solar cell module according to claim 17, characterised in that the light collecting device contains a Fresnel lens. |
| Claim: |
20. Solar cell module according to claim 17, characterised in that 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, selected from the group consisting of greater than 30°, greater than 45°, greater than 90°, and greater than 120°, viewed from the position of the solar cell. |
| Claim: |
21. Solar cell module according to claim 1, characterised in that the second region has a finger configuration. |
| Claim: |
22. Solar cell module according to characterised in that the finger configuration 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: |
23. Solar cell module according to claim 21, characterised in that the finger configuration of the second region has, at least on its end orientated towards the solar cell or on a length of at least 5 mm, at least a width of <2 mm, advantageously <1 mm. |
| Claim: |
24. Method for the production of a solar cell module according to claim 1 and comprising the steps of: coating the surface of the planar substrate with a metal layer, structuring the metal layer at least one of before and after the coating step in order to form the plurality of two-dimensional portions and regions of the portions, and disposing a solar cell with its 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 the second electrical contact of the solar cell for each portion. |
| Claim: |
25. Method according to claim 24, further comprising the step of producing grooves in the copper layer for structuring the metal layer. |
| Claim: |
26. Method according to claim 24, characterised in that the structuring of the metal layer is effected by at least one of photolithographic etching, punching and laser cutting. |
| Claim: |
27. Method according to claim 24 wherein the step of structuring the metal layer before coating the surface includes the steps of: coating the surface between the individual regions or portions at predetermined positions, keeping connecting webs made of metal 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: |
28. Method according to claim 24, further comprising the steps of structuring position markings into the metal layer and the solar cells and positioning electronic components taking into account the position markings. |
| Claim: |
29. (canceled) |
| Current U.S. Class: |
136/244 |
| Current International Class: |
02; 05 |
| رقم الانضمام: |
edspap.20080230109 |
| قاعدة البيانات: |
USPTO Patent Applications |