Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
  • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
  • H01L31/02—Details
  • H01L31/02002—Arrangements for conducting electric current to or from the device in operations
  • H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
  • H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
  • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
  • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
  • H01L31/042—PV modules or arrays of single PV cells
  • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
  • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
  • H01L31/02—Details
  • H01L31/02002—Arrangements for conducting electric current to or from the device in operations
  • H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
  • H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
  • H01L31/0201—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules comprising specially adapted module bus-bar structures
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
  • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
  • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
  • H01L31/042—PV modules or arrays of single PV cells
  • H01L31/048—Encapsulation of modules
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
  • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
  • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E10/00—Energy generation through renewable energy sources
  • Y02E10/50—Photovoltaic [PV] energy

Definitions

• the invention relates to a method for producing or electrical connection of a photovoltaic module with a plurality of solar cells according to the preamble of claim 1 and such a photovoltaic module.
• strings or chains of a plurality of solar cells are often placed side by side with the interposition of a laminating film on a front-side carrier glass, usually several such chains of solar cells next to each other. These chains are longitudinally contacted with contacts on the front and the back for the two poles of the electrical connections, advantageously both on the front and on the back of several such connections.
• transverse contact wires On a front side of the solar cells run transverse contact wires, which are connected to the terminals on the front and the back of the solar cells.
• the transverse contact wires lead together to a connection device to be attached later, for example a so-called junction box. This serves for electrical connection of the entire photovoltaic module.
• another laminating film and finally a backsheet is placed on the solar cells. Thereafter, the lamination of the photovoltaic module and then attaching the connection device takes place as electrical contact with the transverse contact wires.
• transverse contact wires are bent from the front edge of the solar cells by 90 ° and placed on the back of the solar cells for subsequent electrical connection to the connection device.
• the transverse contact wires consuming through recesses in the The backsheet and the laminating film on the back of the solar cells are done by hand. This is disadvantageous.
• the invention has for its object to provide an aforementioned method and a corresponding photovoltaic module with which problems of the prior art can be eliminated and in particular an easy to be performed and easily automated way of electrical connection to a photovoltaic module can be achieved.
• a plurality of Gleichpolige terminals of the solar cells are connected to each other via the transverse contact wires and the transverse contact wires are guided next to or in front of the solar cell on a front-side carrier glass. They can advantageously rest on the carrier glass or on a laminating directly on the carrier glass. Furthermore, the transverse contact wires are guided under the backsheet, which also extends over the solar cells. The transverse contact wires are bent or folded together in such a way that they have a greater thickness or that according to the folding have multiples of their own thickness and protrude from the carrier glass or, respectively, survive over.
• transverse contact wires are passed through previously produced cutouts in the backsheet, possibly also in a laminating foil located between the solar cells and the backsheet. Due to the greater thickness, the transverse contact wires are above or above the surface over the backsheet.
• these folded or bent areas are still within the cutout of the films, so that they do not have to be specially moved or passed through.
• the above-mentioned and to be described in detail electrical connection can then be easily performed.
• By bending or folding the cross-contact wires can be achieved that they survive so to speak alone over the surface of the backsheet and are easily accessible for electrical connection.
• a transverse contact wire is folded on each other at least once, so that the thickness is thus at least doubled. It is particularly advantageously folded or bent twice or three times. Multiple folding on each other can be at least partially accomplished with a winding convolution, whereby it is possible to start the folding from the end of the transverse contact wire. However, this depends significantly on a production optimization of the folding. It can be provided in a further embodiment of the invention that the transverse contact wires remain even when folding and in the folded state along their general longitudinal orientation, so no bends are made to the side. The number of folds on each other also depends on the thickness of the laminating film and the backsheet.
• a transverse contact wire which is advantageously a tinned wire, which may be particularly advantageously made of copper, may have a thickness of 0.3 mm to 0.5 mm.
• the width of a transverse contact wire may be at least 3 mm, advantageously about 5 mm.
• the transverse contact wires are guided near the leading edges of the front solar cells and in particular parallel to each other, even those of different pin connections.
• the transverse contact wires run on the narrow sides of the photovoltaic module, so that they can be kept shorter.
• Different pole transverse contact wires should have a distance of a few millimeters to each other.
• a photovoltaic module may be provided per photovoltaic module, a single connection device with a plurality of areas of folded transverse contact wires folded on each other. If a photovoltaic module has, for example, six aforementioned stringers of solar cells, then it is considered advantageous to provide two such connecting devices. Either per connection device certain solar cells or stringers may be provided or both connection devices are, so to speak, parallel to each other and are each connected to all solar cells.
• Per connecting device which in each case has both poles of the solar cells or their electrical connections, two folded regions of transverse contact wires can advantageously be provided per pole. These can be led from the left and from the right to the connection device. It is also possible to offset the folded areas against each other so that they are spatially separated and can not be confused.
• the cross-contact wires connected to the front-side contacts of the solar cells can each run very close to the solar cells and the others with a little more distance. The guided closer to the solar cells cross contact wires can, if they come from left and right to the connection device closer to each other than the other transverse contact wires.
• the recesses are produced in the backsheet, in particular also in the laminating foil applied to the back of the solar cells, before laying, for example by punching.
• the recesses have a rectangular shape or square shape. They should be to compensate for tolerances and especially in the laminating to compensate for spreading area when laminating be much larger than the unfolded areas of the transverse contact wires themselves. For example, they can be about twice as long and several times as wide.
• the recesses in the backsheet and the laminating film should be on top of each other.
• a projection of the bent or unfolded transverse contact wires over the top of the backsheet should be at least 0.1 to 0.2 mm.
• a secure electrical connection is possible, possibly even by an impressed contact in the connection device. This is done after laminating the photovoltaic module.
• the connecting device can then be attached to the edge of the carrier glass or an associated edge profile. Likewise, attachment by sticking to the backsheet is possible.
• the junction box for example, have a closable lid, which is placed after attaching the junction box and the production of the electrical connections to the transverse contact wires.
• An electrical connection of the connection device to the transverse contact wires can be either by the aforementioned applied pressure contacts or the like. respectively.
• Fig. 2 is a plan view of the arrangement of Fig. 1 from the rear side and
• Fig. 3 is a side view exactly on the unfolded end portions of the transverse contact wires.
• Fig. 1 is shown in oblique view below, as several solar cells 11, exemplified by two such solar cells, are provided. They have front contacts 12 on front sides 13, as is well known. Over these front contacts 12 run collecting contacts 15 which are formed by flat wires, which protrude slightly beyond the side edges of the solar cell 11.
• the solar cells 11 are shown in FIG. 1 in the direction of the collecting contacts 15 in the form of so-called th stringers provided, so for example, six to ten solar cells 11 connected as a chain. Again, several of these stringers are arranged side by side, for example four or six.
• Transverse contact wires 17 run in front of the solar cells 11, with transverse contact wires 17a running very close to the solar cells 11, for example at a distance of a few millimeters.
• Transverse contact wires 17b extend parallel thereto and are in particular of the same design, wherein they have a distance of a few millimeters to the transverse contact wires 17a.
• transverse contact wires 17 folded portions 19a and 19b are provided, which are explained in more detail with respect to FIG. They form, so to speak, the end of the transverse contact wires. It can also be seen that the ends or folded portions 19a of the transverse contact wires 17a are much closer to one another than the folded portions 19b of the transverse contact wires 17b.
• the collecting contacts 15 are connected to the transverse contact wires 17a and contacted, preferably by soldering or welding.
• the transverse contact wires 17a which are connected to the left and right to further collecting contacts 15 of front contacts 12 of solar cells 11.
• this is easy to imagine and realize for the expert.
• a front edge of a laminating film 24 projects slightly beyond the transverse contact wires 17b and thus covers it well.
• the leading edge of this laminating film 24 coincides with the front edge of a carrier glass 22 shown in FIG. 3, onto which the solar cells 11 are placed with their front sides 13 interposing another laminating film (not shown). It is, so to speak, a side edge of the entire finished photovoltaic module 30, the assembly of which is shown schematically in FIG.
• FIG. 2 also shows how a backsheet 26 is provided with recesses 27 before it is laid over the rear sides of the solar cells 11 and the transverse contact wires 17.
• recesses 27a are slightly further away from a side edge and closer together than recesses 27b.
• the laminating film 24 and the backsheet 26 are placed on the back side of the solar cells 11, wherein the laminating film 24 has corresponding recesses as the backsheet 26.
• the folded regions 19a are through the recesses 27a in the backsheet 26 and the corresponding recesses in the laminating film 24.
• the folded portions 19b are through the recesses 27b of the laminating film 24 and the backsheet 26. It can be provided, which can be seen from Fig. 2 that the recesses 27th are slightly larger than folded areas 19, but not much larger.
• the transverse contact wires 17 are folded three times at the folded portions 19, thus having four times the thickness of the transverse contact wire.
• the folding takes place in such a way that one end region of the transverse contact wire is laid on each other twice, for example one centimeter to two centimeters in length, and then unfolded inwards from the end. Other folds or bends are possible, as explained above.
• all folded areas 19 have the same height.
• a single such terminal panel is provided with folded areas 19 or for example two or three. This depends on the design and the electrical power of the photovoltaic module.

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• Engineering & Computer Science (AREA)
• Condensed Matter Physics & Semiconductors (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• General Physics & Mathematics (AREA)
• Computer Hardware Design (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Power Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Manufacturing & Machinery (AREA)
• Photovoltaic Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (11)

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Family Cites Families (6)

• 2008
  • 2008-12-05 DE DE102008063551A patent/DE102008063551A1/de not_active Withdrawn
• 2009
  • 2009-11-27 WO PCT/EP2009/008451 patent/WO2010063412A2/de active Application Filing
  • 2009-11-27 CA CA2745700A patent/CA2745700A1/en not_active Abandoned
  • 2009-11-27 CN CN200980148622.6A patent/CN102246322B/zh active Active
  • 2009-11-27 SG SG2011039609A patent/SG171878A1/en unknown
  • 2009-11-27 KR KR1020117012563A patent/KR20110114533A/ko not_active Application Discontinuation
  • 2009-11-27 EP EP09763863A patent/EP2353185A2/de not_active Withdrawn
  • 2009-11-27 MX MX2011005821A patent/MX2011005821A/es not_active Application Discontinuation
  • 2009-11-27 AU AU2009321754A patent/AU2009321754A1/en not_active Abandoned
  • 2009-12-04 TW TW098141571A patent/TW201029214A/zh unknown
• 2011
  • 2011-06-02 IL IL213336A patent/IL213336A0/en unknown

Non-Patent Citations (1)

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