CN111261742A - Photovoltaic device and photovoltaic solder strip and method of manufacturing the same - Google Patents
Photovoltaic device and photovoltaic solder strip and method of manufacturing the same Download PDFInfo
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- CN111261742A CN111261742A CN201911227997.3A CN201911227997A CN111261742A CN 111261742 A CN111261742 A CN 111261742A CN 201911227997 A CN201911227997 A CN 201911227997A CN 111261742 A CN111261742 A CN 111261742A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 229910000679 solder Inorganic materials 0.000 title claims description 265
- 238000003466 welding Methods 0.000 claims abstract description 71
- 239000002184 metal Substances 0.000 claims description 150
- 229910052751 metal Inorganic materials 0.000 claims description 150
- 230000001788 irregular Effects 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 2
- 230000001678 irradiating effect Effects 0.000 abstract description 18
- 239000010410 layer Substances 0.000 description 209
- 239000000463 material Substances 0.000 description 26
- 238000005476 soldering Methods 0.000 description 25
- 238000006243 chemical reaction Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910052797 bismuth Inorganic materials 0.000 description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000001579 optical reflectometry Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- 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
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
-
- 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
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
-
- 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
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- 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
- Y02E10/52—PV systems with concentrators
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
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- Microelectronics & Electronic Packaging (AREA)
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- Manufacturing & Machinery (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a photovoltaic device, a photovoltaic welding strip and a manufacturing method thereof, wherein the photovoltaic welding strip comprises at least one front side connecting section and at least one back side connecting section extending to the front side connecting section, the front side connecting section is provided with a welding surface and a reflecting surface opposite to the welding surface, a height difference exists between at least two points on the reflecting surface of the front side connecting section, and sunlight vertically irradiating the photovoltaic welding strip can reach a cell piece after being reflected by the reflecting surface of the front side connecting section.
Description
Technical Field
The invention relates to a photovoltaic solder strip, in particular to a photovoltaic device, a photovoltaic solder strip and a manufacturing method thereof.
Background
In recent years, with the development of solar technology, users have increasingly high requirements for photovoltaic solder strips used in solar technology. The photovoltaic solder strips are applied to the photovoltaic device, for example, the photovoltaic solder strips are welded on the front and back surfaces of adjacent solar cells at intervals, so that the plurality of solar cells are connected in series or in parallel, and then a complete electrical path can be formed, so that the photovoltaic device can convert solar energy into electric energy. In addition, the photovoltaic welding strip has good conductivity, and electric energy generated by the photovoltaic device through conversion of solar energy can be transmitted through the photovoltaic welding strip. That is, the quality of the photovoltaic solder strip directly affects the collection efficiency and conversion efficiency of the photovoltaic device for solar energy, the power requirement of the photovoltaic device, and the like.
Specifically, the conventional photovoltaic device includes at least one photovoltaic solder ribbon and a plurality of solar panels, wherein the photovoltaic solder ribbon includes a copper base and two solder layers, the solder layers respectively cover an upper surface and a lower surface of the copper base, and the solder layers enable adjacent portions of the photovoltaic solder ribbon to be soldered to upper and lower surfaces of adjacently disposed solar panels at intervals, so that the solar panels are connected to each other. However, the photovoltaic device and the photovoltaic solder strip thereof still have a lot of problems in the practical application process.
Because the solar cell piece receives sunlight by means of the upper surface of the solar cell piece, when the photovoltaic welding strip is welded on the solar cell piece, the photovoltaic welding strip shields the upper surface of the solar cell piece, so that the sunlight directly irradiating the solar cell piece is reduced, the area of the sunlight which can be received by the solar cell piece is reduced, the collection efficiency of the solar cell piece on the solar energy is reduced, and the utilization efficiency of the solar cell piece on the solar energy is further influenced.
In order to improve the utilization of sunlight by the photovoltaic device, the photovoltaic device which is gradually on the market further comprises a reflector plate which is kept above the photovoltaic solder strip in parallel, i.e. the photovoltaic solder strip which is welded on the solar cell panel is kept between the reflector plate and the solar cell panel. Sunlight irradiated to the photovoltaic solder strip can be reflected to the reflecting plate by the soldering tin layer of the photovoltaic solder strip, and can reach the solar cell after being reflected again by the reflecting plate, so that the influence of the photovoltaic solder strip on the efficiency of the solar cell panel is reduced. However, the solder layer surface of the conventional photovoltaic solder strip is flat and smooth, the upper surface of the solder layer is parallel to the copper base, when the photovoltaic solder strip is soldered to the photovoltaic device, the upper surface of the solder layer is parallel to the upper surface of the solar cell and the reflector plate, and sunlight which is vertically irradiated to the photovoltaic solder strip is perpendicular to the upper surface of the solder layer, that is, an incident angle of the sunlight to the upper surface of the solder layer is 90 °, and after the sunlight which is incident to the photovoltaic solder strip is reflected by the solder layer of the photovoltaic solder strip, reflected light is incident to the reflector plate in a manner of being perpendicular to the surface of the reflector plate, and is further reflected by the surface of the reflector plate to the solder layer of the photovoltaic solder strip again. That is to say, the sunlight vertically irradiating the photovoltaic solder strip can not be utilized, and then the utilization rate of the sunlight by the light energy component is reduced.
Disclosure of Invention
An object of the present invention is to provide a photovoltaic device, a photovoltaic solder strip and a manufacturing method thereof, wherein the structure of the photovoltaic solder strip is improved to increase the sunlight reflection area of the photovoltaic solder strip, thereby improving the sunlight reflection capability of the photovoltaic solder strip, and facilitating to improve the sunlight receiving efficiency and the sunlight conversion efficiency of the photovoltaic device using the photovoltaic solder strip.
Another object of the present invention is to provide a photovoltaic device and a photovoltaic solder ribbon and a method for manufacturing the same, wherein the photovoltaic solder ribbon comprises at least a front connection section and a back connection section, wherein the front connection section and the back connection section are respectively soldered to the front and back of the adjacent cell panels to connect the adjacent cell panels, thereby increasing the solar light receiving efficiency and the solar light conversion efficiency of the photovoltaic device by increasing the reflection area of the front connection section to the solar light.
Another object of the present invention is to provide a photovoltaic device and a photovoltaic solder ribbon and a method for manufacturing the same, wherein the front connection segment has a soldering surface and a reflecting surface opposite to the soldering surface, the reflecting surface extends obliquely to the soldering surface, and compared with the prior art in which the reflecting surface is parallel to the soldering surface, the area of the reflecting surface of the photovoltaic solder ribbon of the present invention is increased, thereby improving the solar light reflection capability of the photovoltaic solder ribbon.
An object of the present invention is to provide a photovoltaic device and a photovoltaic solder ribbon and a manufacturing method thereof, wherein the photovoltaic device can utilize sunlight vertically irradiated to the photovoltaic solder ribbon by the photovoltaic solder ribbon to reduce the influence of the photovoltaic solder ribbon on the efficiency of the photovoltaic device for receiving sunlight, which is beneficial to improving the efficiency of the photovoltaic device for receiving sunlight and the conversion efficiency of the photovoltaic device for receiving sunlight.
Another object of the present invention is to provide a photovoltaic device and a photovoltaic solder ribbon and a method for manufacturing the same, wherein sunlight irradiated perpendicularly to the photovoltaic solder ribbon is reflected by the photovoltaic solder ribbon, and the reflected sunlight reaches a cell panel of the photovoltaic device and is received by the cell panel, so as to improve the receiving efficiency and the conversion efficiency of the photovoltaic device for sunlight.
Another object of the present invention is to provide a photovoltaic device and a photovoltaic solder ribbon and a method for manufacturing the same, wherein sunlight irradiated perpendicularly to the photovoltaic solder ribbon can be reflected by the surface of the front connection section, and the reflected sunlight can reach the cell panel of the photovoltaic device, so as to facilitate improvement of solar energy receiving efficiency and conversion efficiency of the photovoltaic device.
Another object of the present invention is to provide a photovoltaic device and a photovoltaic solder strip and a manufacturing method thereof, wherein the sunlight vertically irradiating the photovoltaic solder strip forms an inclined angle with at least a portion of the reflective surface, and the incident angle of the sunlight vertically irradiating the photovoltaic solder strip on the reflective surface is smaller than 90 °, so as to facilitate the subsequent utilization of the sunlight reflected by the reflective surface.
Another object of the present invention is to provide a photovoltaic device and a photovoltaic solder ribbon and a method for manufacturing the same, wherein at least two points on a reflection surface of the front surface connecting section have a height difference, so that an incident angle of sunlight vertically irradiated to the photovoltaic solder ribbon and the reflection surface of the front surface connecting section is less than 90 °, so that the sunlight reflected by the reflection surface is subsequently received by the cell sheet.
Another object of the present invention is to provide a photovoltaic device and a photovoltaic solder ribbon and a method for manufacturing the same, wherein a height difference exists between at least two points on a cross section along a length direction of the front surface connecting section, so that an incident angle of sunlight vertically irradiated to the photovoltaic solder ribbon and the reflecting surface of the front surface connecting section is less than 90 °, and the sunlight reflected by the reflecting surface is received by the cell piece subsequently.
Another object of the present invention is to provide a photovoltaic device and a photovoltaic solder ribbon and a manufacturing method thereof, wherein sunlight irradiated to the photovoltaic solder ribbon is reflected once by the reflecting surface of the photovoltaic solder ribbon to reach the front surface of the cell, and then received by the cell, so as to improve the receiving efficiency and the conversion efficiency of the photovoltaic device for solar energy.
Another object of the present invention is to provide a photovoltaic device and a photovoltaic solder ribbon and a method for manufacturing the same, wherein the photovoltaic device provides a reflector having a reflective surface, wherein the reflector is held above the photovoltaic solder ribbon in such a manner that the reflective surface is parallel to the cell, and sunlight irradiated to the photovoltaic solder ribbon is reflected by the reflective surface of the photovoltaic solder ribbon, and then reflected again by the reflective surface of the reflector, and reaches the cell and is received by the cell.
According to one aspect of the present invention, the present invention further provides a photovoltaic solder ribbon, comprising:
at least one front connecting section; and
at least one back side connecting section extending from the front side connecting section, wherein the front side connecting section has a bonding surface and a reflecting surface opposite to the bonding surface, wherein a height difference exists between at least two points on the reflecting surface of the front side connecting section.
According to an embodiment of the present invention, the front connection segment includes a front metal layer, a front reflection layer, and a front soldering layer, wherein the front metal layer has a first side surface and a second side surface opposite to the first side surface, the front reflection layer and the front soldering layer are disposed on the first side surface and the second side surface of the front metal layer, wherein the reflection surface is formed on the front reflection layer, an extending direction of the reflection surface is identical to an extending direction of the first side surface of the front metal layer, and a height difference exists between at least two points on the first side surface of the front metal layer.
According to one embodiment of the invention, the front metal layer of the front connection section has a triangular cross-section.
According to one embodiment of the invention, the front side metal layer of the front side connection segment is trapezoidal in cross-section.
According to one embodiment of the invention, the front metal layer of the front connection segment is semi-circular in cross-section.
According to one embodiment of the invention, the cross-section of the front metal layer of the front connection segment is semi-elliptical.
According to one embodiment of the invention, the cross-section of the front metal layer of the front connection segment is irregular polygonal.
According to one embodiment of the invention, there is a height difference between at least two points on the second side of the front-side metal layer.
According to an embodiment of the present invention, the front metal layer further includes a welding portion and a reflective protrusion, wherein the reflective protrusion extends upward from the welding portion, the first side surface is formed on the reflective protrusion, and the cross section of the welding portion is rectangular.
According to one embodiment of the present invention, the reflective protrusions of the front metal layer have a triangular cross-section.
According to one embodiment of the invention, the reflective protrusions of the front metal layer are trapezoidal in cross-section.
According to one embodiment of the present invention, the reflective protrusions of the front metal layer have a semicircular cross-section.
According to one embodiment of the present invention, the cross-section of the reflective bump of the front metal layer is a semi-elliptical shape.
According to one embodiment of the present invention, the reflective protrusions of the front metal layer have irregular polygonal cross-sections.
According to an embodiment of the present invention, the front connection segment includes a front metal layer, a front reflection layer and a front soldering layer, wherein the front metal layer has a first side surface and a second side surface opposite to the first side surface, the front reflection layer and the front soldering layer are disposed on the first side surface and the second side surface of the front metal layer, wherein the reflection surface is formed on the front reflection layer, and the first side surface and the second side surface of the front metal layer are two planes parallel to each other.
According to one embodiment of the present invention, the front surface reflection layer of the front surface connection section has a triangular cross section.
According to one embodiment of the invention, the front side reflective layer of the front side connection segment is trapezoidal in cross-section.
According to one embodiment of the invention, the front side reflective layer of the front side connection segment has a semicircular cross section.
According to one embodiment of the invention, the cross-section of the front reflective layer of the front connecting section is a semi-ellipse.
According to one embodiment of the invention, the front side reflective layer of the front side connection segment has a cross-section of an irregular polygon.
According to one embodiment of the invention, the reflecting surface of the front connecting section is formed by at least two planes inclined at an angle to the horizontal.
According to one embodiment of the invention, the reflecting surface of the front connecting section is formed by at least one curved surface.
According to one embodiment of the invention, the reflecting surface of the front connecting section is formed by at least one curved surface and one flat surface.
According to another aspect of the present invention, the present invention further provides a photovoltaic device, comprising:
at least two battery pieces;
the reflecting plate is provided with a reflecting surface, and the reflecting plate is held above the battery piece in a manner that the reflecting surface faces the battery piece; and
at least one photovoltaic solder strip, wherein the photovoltaic solder strip includes at least one front side connection section and at least one back side connection section extending from the front side connection section, wherein the front side connection section has a soldering surface and a reflection surface opposite to the soldering surface, wherein there is a height difference between at least two points on the reflection surface of the front side connection section, the front side connection section of the photovoltaic solder strip is welded to one of the front sides of the battery pieces, the back side connection section of the photovoltaic solder strip is welded to the other of the back sides of the battery pieces, the front side connection section is located between the battery pieces and the reflection surface of the reflection plate.
According to another aspect of the present invention, the present invention further provides a manufacturing method of a photovoltaic solder ribbon, the manufacturing method comprising the steps of:
(a) providing a metal wire; and
(b) and forming a welding layer on the metal wire, wherein at least two points on a reflecting surface of the welding layer have a height difference so as to prepare the photovoltaic welding strip.
According to an embodiment of the present invention, before the step (b), further comprising a step (c): a preset shape is formed at a preset position of the metal wire at intervals, and at least two points on the upper surface of the preset position of the metal wire which are formed in a preset mode have a height difference.
According to an embodiment of the present invention, after the step (c), further comprising a step (d): flattening the portion of the wire between the predetermined positions.
According to an embodiment of the present invention, before the step (b), further comprising a step (e): flattening the wire.
According to an embodiment of the present invention, after the step (e), further comprising the step (f): bending a preset position of the flattened metal wire at intervals, and enabling the upper surface of the metal wire to be convex outwards.
According to an embodiment of the present invention, the step (b) further comprises a step (g): forming the welding layer on the surface of the metal wire, wherein the extending direction of the welding layer is consistent with the extending direction of the surface of the metal wire.
According to an embodiment of the present invention, after the step (e), further comprising the step (f): forming the welding layer having a predetermined shape on the wire, and a height difference exists between at least two points on a cross section of the welding layer having the predetermined shape.
Drawings
Fig. 1 is a schematic view of a photovoltaic solder ribbon according to a preferred embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of the photovoltaic solder strip according to the above preferred embodiment of the present invention.
Fig. 3A is a schematic view of the application of the photovoltaic solder strip according to the above preferred embodiment of the invention.
Fig. 3B is a schematic diagram of the application of the photovoltaic solder strip according to the above preferred embodiment of the invention.
Fig. 4 is a schematic diagram of an application of the photovoltaic solder strip according to another preferred embodiment of the invention.
Fig. 5 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 7 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 8 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 9 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 10 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 11 is a schematic cross-sectional view of the photovoltaic solder ribbon according to another preferred embodiment of the present invention.
Fig. 12 is a schematic view of the application of the photovoltaic solder strip according to the above preferred embodiment of the invention.
Fig. 13 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 14 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 15 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 16 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 17 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 18 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 19 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 20 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 21 is a schematic view of the application of the photovoltaic solder strip according to the above preferred embodiment of the invention.
Fig. 22 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 23 is a schematic view of the application of the photovoltaic solder strip according to the above preferred embodiment of the invention.
Fig. 24 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 25 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 26 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 27 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 28 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 29A is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 29B is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 30 is a schematic cross-sectional view of the photovoltaic solder strip according to another preferred embodiment of the present invention.
Fig. 31 is a schematic view of the application of the photovoltaic solder strip according to the above preferred embodiment of the invention.
Fig. 32A is a schematic view of a stage in the manufacturing process of the photovoltaic solder strip in accordance with a preferred embodiment of the present invention.
Fig. 32B is a schematic diagram of a stage in the manufacturing process of the photovoltaic solder ribbon according to the above preferred embodiment of the invention.
Fig. 32C is a schematic diagram of a stage in the manufacturing process of the photovoltaic solder ribbon according to the above preferred embodiment of the invention.
Fig. 33A is a schematic diagram of a stage in the manufacturing process of the photovoltaic solder ribbon according to a preferred embodiment of the invention.
Fig. 33B is a schematic diagram of a stage in the manufacturing process of the photovoltaic solder ribbon according to the above preferred embodiment of the invention.
Fig. 33C is a schematic diagram of a stage in the manufacturing process of the photovoltaic solder ribbon according to the above preferred embodiment of the invention.
Fig. 34A is a schematic diagram of a stage in the manufacturing process of the photovoltaic solder ribbon according to a preferred embodiment of the invention.
Fig. 34B is a schematic diagram of a stage in the manufacturing process of the photovoltaic solder ribbon according to the above preferred embodiment of the invention.
Fig. 34C is a schematic diagram of a stage in the manufacturing process of the photovoltaic solder ribbon according to the above preferred embodiment of the invention.
Fig. 35B is a schematic diagram of a stage in the manufacturing process of the photovoltaic solder ribbon according to the above preferred embodiment of the invention.
Fig. 36 is a schematic diagram of a variant embodiment of a stage in the manufacturing process of the photovoltaic solder ribbon according to the above preferred embodiment of the invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms should not be construed as limiting the invention.
It is to be understood that the terms "a" and "an" are to be interpreted as meaning "at least one" or "one or more," i.e., that a single element may be present in a single embodiment, while in other embodiments the element may be present in a plurality, and the terms "a" and "an" are not to be interpreted as limiting the number.
Referring to fig. 1 to 3B, a photovoltaic solder ribbon 100 according to a preferred embodiment of the present invention will be described in the following description, wherein at least one of the photovoltaic solder ribbons 100 is soldered to the front and back surfaces of at least two adjacent battery pieces 200, and a plurality of the battery pieces 200 are connected in series or in parallel to form a photovoltaic device 1000. Further, the reflection area of the photovoltaic solder strip 100 to sunlight is increased, so that the reflection capacity of the photovoltaic solder strip 100 to sunlight is improved, and the improvement of the receiving efficiency and the conversion efficiency of the photovoltaic device 1000 using the photovoltaic solder strip 100 to sunlight is facilitated. Furthermore, the sunlight of the photovoltaic solder strip 100 irradiated to the photovoltaic device 1000 can be reflected to the cell sheet 200 by the photovoltaic solder strip 100, so that the photovoltaic device 1000 utilizes the sunlight perpendicularly irradiated to the photovoltaic solder strip 100 by the photovoltaic solder strip 100 to reduce the influence of the photovoltaic solder strip on the efficiency of receiving the sunlight by the photovoltaic device 1000, thereby being beneficial to further improving the efficiency of receiving the sunlight and the conversion efficiency of the photovoltaic device 1000.
Referring to fig. 3B, the photovoltaic device 1000 further includes a reflective plate 300, wherein the reflective plate 300 is held above the battery plate 200 with a reflective surface 301 facing the battery plate 200, and the reflective surface 301 of the reflective plate 300 is parallel to the battery plate 200. The photovoltaic welding strip 200 welded to the front surface of the cell piece 200 is held between the light reflecting surface 301 of the reflector 300 and the cell piece 200, sunlight reflected by the surface of the photovoltaic welding strip 100 can reach the light reflecting surface 301 of the reflector 300, and the light reflecting surface 301 reflects the sunlight again, so that the sunlight irradiated to the photovoltaic welding strip 100 reaches the cell piece 200 and is further received by the cell piece 200, thereby improving the receiving efficiency and the conversion efficiency of the photovoltaic device 1000 on the sunlight. Referring to fig. 4, the solar light irradiated to the front surface of the battery cell 200 and the photovoltaic solder strip 100 soldered to the front surface of the battery cell 200 is reflected by the photovoltaic solder strip 100, and the reflected solar light reaches the light reflecting surface 301 of the reflective plate 300, is reflected again by the light reflecting surface 301, and reaches the front surface of the battery cell 200, and is received by the battery cell 200, so that the received solar light can be converted into electric energy subsequently. That is to say, while the photovoltaic solder strip 100 increases the reflection area of sunlight, the photovoltaic device 1000 receives and utilizes the sunlight vertically irradiated to the photovoltaic solder strip 100 through the photovoltaic solder strip 100 to reduce the influence of the photovoltaic solder strip 100 on the efficiency of receiving sunlight by the photovoltaic device 1000, which is beneficial to further improving the efficiency of receiving sunlight and the efficiency of converting sunlight by the photovoltaic device 1000. That is, the photovoltaic solder strip 100 not only can reflect the sunlight obliquely irradiated to the cell sheet 200 for being subsequently received by the cell sheet 200, but also the photovoltaic solder strip 100 can reflect the sunlight perpendicularly irradiated to the cell sheet 200, thereby improving the receiving efficiency and the conversion efficiency of the photovoltaic device 1000 for the sunlight.
It should be noted that, in a preferred embodiment of the present invention, the sunlight vertically irradiated to the photovoltaic solder strip 100 reaches the front surface of the cell sheet 200 after being reflected by the photovoltaic solder strip 100 for the first time, and the front surface of the cell sheet 200 receives the sunlight and can subsequently convert the absorbed solar energy into electric energy. It is understood by those skilled in the art that the irradiation angle of the sunlight is not limited to the irradiation in the vertical direction, and the photovoltaic solder strip 100 has the effect of improving the conversion of the solar energy into the electric energy when irradiated by the sunlight within a certain preset range of angles.
Specifically, referring to fig. 1 to 3B, the photovoltaic solder ribbon 100 includes at least one front connection segment 10 and at least one back connection segment 20, wherein the back connection segment 20 and the front connection segment 10 are spaced apart from each other, and the back connection segment 10 integrally extends along the back connection segment 20. The front connection segment 10 is soldered to the front surface of one cell piece 200, the back connection segment 20 is soldered to the back surface of another cell piece 200, the photovoltaic solder strip 100 interconnects the adjacent cell pieces 200, and the front surface of the cell piece 200 receives sunlight and can subsequently convert absorbed solar energy into electric energy. The sunlight reflecting capacity of the photovoltaic solder strip 100 is improved by increasing the sunlight reflecting area of the front connecting section 20, and the sunlight receiving efficiency and the sunlight conversion efficiency of the photovoltaic device 1000 are further improved.
It is worth mentioning that there is an extension between the front connection segment 10 and the back connection segment 20, through which the front connection segment 10 and the back connection segment 20 are connected to each other. The extension section is made of flexible materials and has a certain preset length. When the soldering strip 100 is connected to two of the battery pieces 200, respectively, since the front connection segment 10 is welded to the front surface of the battery piece 200 and the back connection segment 20 is welded to the back surface of the other battery piece 200, the extension segment is just located between the two battery pieces 200, which plays a transition role and improves the connection between the soldering strip 100 and the battery pieces 200.
Further, referring to fig. 3B, in some embodiments of the present invention, the front side connection segment 10 of the photovoltaic solder ribbon 100 directly reflects sunlight irradiated to the photovoltaic solder ribbon 100 to the front side of the cell sheet 200. Referring to fig. 4, in other embodiments of the present invention, the front connection segment 10 of the photovoltaic solder ribbon 100 reflects sunlight irradiated to the photovoltaic solder ribbon 100 to the reflective surface 301 of the reflective plate 300, and is reflected again by the reflective surface 301 of the reflective plate 300, so that the sunlight irradiated to the photovoltaic solder ribbon 100 is reflected to the front surface of the cell sheet 200 and is received by the cell sheet 200. It should be understood that both the sunlight obliquely irradiated to the photovoltaic solder strip 100 and the sunlight perpendicularly irradiated to the photovoltaic solder strip 100 can be sequentially reflected by the reflective surface 102 of the front surface connecting section 10 and the reflective surface 301 of the reflective plate 300 to reach the front surface of the battery piece 200.
Further, the front connecting segment 10 has a welding surface 101 and a reflecting surface 102 opposite to the welding surface 101, wherein the welding surface 101 is welded to the front surface of the battery piece 200, and the reflecting surface 102 faces the reflecting surface 301 of the reflecting plate 300. The reflective surface 102 of the front connection segment 10 can reflect sunlight to reduce the influence of the shielding of the photovoltaic solder strip 100 on the ability of the cell sheet 200 to receive sunlight. Furthermore, there is a height difference between at least two points on the reflecting surface 102, and compared with the prior art in which the reflecting surface is parallel to the welding surface, the area of the reflecting surface 102 of the front surface connecting section 10 of the photovoltaic solder strip 100 of the present invention is increased, thereby improving the sunlight reflecting capability of the photovoltaic solder strip. Moreover, there is a height difference between at least two points on the reflection surface 102, the extending direction of the reflection surface 102 is not consistent with the extending direction of the welding surface 101, an included angle can be formed between the reflection surface 102 and the welding surface 101, and an incident angle formed by the sunlight vertically irradiating the photovoltaic welding strip 100 on the reflection surface 102 is smaller than 90 °, according to the optical principle, the reflection angle formed by the sunlight after being reflected by the reflection surface 102 of the photovoltaic welding strip 100 is smaller than 90 °, that is, the incident angle formed by the reflected sunlight on the reflection surface 301 of the reflection plate 300 is smaller than 90 °, and the reflection angle formed by the reflected sunlight after being reflected again by the reflection surface 301 of the reflection plate 300 is smaller than 90 °. In this way, the sunlight vertically irradiated to the photovoltaic solder strip 100 can be reflected by the reflecting surface 102 and then directly reaches the front surface of the cell 200, or the sunlight vertically irradiated to the photovoltaic solder strip 100 can sequentially pass through the reflecting surface 102 of the photovoltaic solder strip 100 and the reflecting surface 301 of the reflecting plate 300 and then reach the front surface of the cell 200, and is received by the cell, so as to improve the receiving efficiency and the conversion efficiency of the photovoltaic device 1000 for the sunlight.
Referring to fig. 1 to 3B, the front connection segment 10 of the photovoltaic solder ribbon 100 includes a front metal layer 11, a front reflection layer 12, and a front solder layer 13, wherein the front reflection layer 12 and the front solder layer 13 are respectively disposed on an upper surface and a lower surface of the front metal layer 11, the reflection surface 102 is formed on the front reflection layer 12, and a height difference exists between at least two points on the reflection surface 102, that is, a height difference exists between at least two points on a cross section along a length direction of the front connection segment 10 of the photovoltaic solder ribbon 100. It should be noted that the length direction of the front connecting segment 10 of the present invention refers to a direction extending from the front connecting segment 10 to the back connecting segment 20, and the cross section of the front connecting segment 10 refers to a surface formed by cutting the front connecting segment 10 with a plane perpendicular to the length direction of the front connecting segment 10.
It should be noted that the front connection segment 10 extends from the photovoltaic solder strip 10, the front connection segment 10 on the photovoltaic solder strip 100 is integrally formed on the photovoltaic solder strip 10 or a gap with a predetermined distance is formed between the front connection segments 10, and it is understood by those skilled in the art that the relative position of the front connection segment 10 on the photovoltaic solder strip 10 is not limited. In another embodiment, the front side reflective layer 12 and the front side bonding layer 13 have a height difference between two points, the height difference of the front side reflective layer 12 is located to improve the light reflectivity of the photovoltaic solder ribbon 10, and the height difference of the front side bonding layer 13 is located to improve the connection between the photovoltaic solder ribbon 10 and the cell.
It should be understood by those skilled in the art that the materials of the front metal layer 11, the front reflection layer 12 and the front soldering layer 13 are not limited, wherein the front metal layer 11 is made of a material having good conductive properties, such as copper, silver, gold and their alloys, which are one or more of the materials known to those skilled in the art. The front reflection layer 12 and the front soldering layer 13 are made of a material having good soldering performance and good light reflection performance, such as tin, silver, lead, bismuth and alloys thereof, or one or more materials known to those skilled in the art. In a preferred embodiment of the present invention, the front metal layer 11 can be made of a copper wire.
Further, referring to fig. 1 to 3B, the front metal layer 11 has a first side 111 and a second side 112 opposite to the first side 111, wherein the front reflection layer 12 and the front soldering layer 13 are respectively disposed on the first side 111 and the second side 112 of the front metal layer 11. The front reflective layer 12 has an extended surface 121 opposite to the reflective surface 102, and the extended surface 121 of the front reflective layer 12 is attached to the first side surface 111 of the front metal layer 11. The upper surface of the front side bonding layer 13 is attached to the second side surface 111 of the front side metal layer 11. Preferably, the upper surface and the lower surface of the front side bonding layer 13 are parallel to the second side 111 of the front side metal layer 11. Preferably, the front surface welding layer 13 has a concave-convex structure, that is, the upper surface of the front surface welding layer 13 is flat, and the lower surface is concave-convex. It should be understood that the specific structure of the korean layer 13 is only for illustration and should not be construed as a limitation to the content and scope of the photovoltaic solder ribbon 100 of the present invention.
Referring to fig. 1 to 12, in some preferred embodiments of the present invention, the extending direction of the extending surface 121 and the reflecting surface 102 of the front surface reflective layer 12 is consistent with the first side surface 111 of the front surface metal layer 11. For example, the extending surface 121 and the reflecting surface 102 of the front surface reflective layer 12 are parallel to the first side surface 111 of the front surface metal layer 11. In other words, due to the structure of the front metal layer 11, a height difference exists between at least two points formed on the reflection surface 102 of the front reflection layer 12, so that sunlight perpendicularly irradiated to the photovoltaic solder strip 100 can be utilized while the reflection area of the photovoltaic solder strip 100 for sunlight is increased.
Preferably, there is a height difference between at least two points on the first side 111 of the front metal layer 11. That is, the second side surface 112 is a plane, and the first side surface 111 extends obliquely to the second side surface 112. The front reflection layer 12 is formed on the first side surface 111, at least two points on the extension surface 121 of the front reflection layer 12 have a height difference therebetween, and at least two points on the reflection surface 102 having the extension direction identical to the extension direction of the first side surface 111 have a height difference therebetween, so that at least two points on a cross section of the front connection segment 10 along the length direction of the front connection segment 10 have a height difference therebetween.
Referring to fig. 1 to 6, preferably, the cross section of the front metal layer 11 is triangular, that is, the second side surface 112 is a plane, the first side surface 111 is a bent surface formed by two planes extending obliquely to the edge of the second side surface 112, and the extending directions of the extending surface 121 and the reflecting surface 102 of the front reflective layer 12 formed on the front metal layer 11 are parallel to the extending direction of the first side surface 111. Further, when the front side bonding layer 13 of the front side connection segment 10 is welded to the cell sheet 200, the second side surface 112 of the front side metal layer 11 of the front side connection segment 10 is parallel to the cell sheet 200, an included angle can be formed between the reflection surface 102 of the front side connection segment 10 and the cell sheet 200, and an incident angle of sunlight vertically irradiating the photovoltaic solder strip 100 to the reflection surface 102 of the front side connection segment 10 is smaller than 90 °, so that the sunlight vertically irradiating the photovoltaic solder strip 100 is directly reflected to the front side of the cell sheet 200 by the reflection surface 102 of the front side connection segment 10.
In addition, an included angle can be formed between the first side surface 111 of the front metal layer 11 and the light reflecting surface 301 of the reflecting plate 300, so that while the reflection area of the photovoltaic solder strip 100 to sunlight is increased, an included angle can be formed between the reflecting surface 102 of the front connecting section 10 and the light reflecting surface 301 of the reflecting plate 300, the incident angle of the sunlight vertically irradiating the photovoltaic solder strip 100 on the reflecting surface 102 of the front connecting section 10 is smaller than 90 °, the incident angle of the sunlight capable of being reflected by the reflecting surface 102 to the light reflecting surface 301 of the reflecting plate 300 on the light reflecting surface 301 is smaller than 90 °, so that the sunlight vertically irradiating the photovoltaic solder strip 100 is sequentially reflected by the reflecting surface 102 of the front connecting section 10 of the photovoltaic solder strip 100 and the light reflecting surface 301 of the reflecting plate 300, and reaches the front surface of the battery cell 200.
The cross section of the front metal layer 11 is implemented as, but not limited to, an isosceles triangle, an equilateral triangle, a right-angled triangle, an obtuse-angled triangle, and an acute-angled triangle. It should be understood that the specific shape of the cross section of the front metal layer 11 is not limited, and referring to fig. 7 to 10, the front metal layer 11 may also be implemented as a semi-circle, a semi-ellipse, a trapezoid, a pentagon, an irregular polygon, and so on, wherein an irregular polygon means that at least two faces have an inclination angle with respect to a horizontal plane, so that there is a height difference between at least two points on the reflection surface 102 extending in a direction consistent with the extending direction of the first side surface 111 of the front metal layer 11, and there is a height difference between at least two points on the cross section of the front connection section 10 along the length direction of the front connection section 10. It should be understood that the cross-section of the front metal layer 11 according to the present invention refers to a surface which is formed by cutting the front metal layer 11 in a plane perpendicular to the longitudinal direction of the front metal layer 11.
That is, the first side surface 111 of the front metal layer 11 may be formed to have at least two planes inclined from a horizontal plane to form a bent surface, or may be formed to have at least one curved surface, or the first side surface 111 may be formed to have one plane and one curved surface, and correspondingly, the reflective surface 102 may be formed to have at least two planes inclined from a horizontal plane to form a bent surface, or may be formed to have at least one curved surface, or the first side surface 111 may be formed to have one plane and one curved surface, so that a height difference exists between at least two points on the reflective surface 102. It should be noted that the specific angles, dimensions and proportions set forth in the drawings and the description herein are merely illustrative and are not intended to limit the scope and content of the photovoltaic solder ribbon 100 of the present invention.
For example, the cross section of the front metal layer 11 is preferably implemented as an equilateral triangle, the included angle between the first side surface 111 and the second side surface 112 of the front metal layer 11 is 60 °, the angle formed between the first side surface 11 and the soldering surface 101 is 60 °, and the inclination angle between the reflection surface 102 of the front reflection layer 12 formed on the first side surface 111 of the front metal layer 11 and the soldering surface 101 is 60 °. When the front side bonding layer 13 of the front side connection segment 10 is bonded to the front side of the cell sheet 102, the inclination angle between the reflection surface 102 of the front side reflection layer 12 and the front side of the cell panel 200 is 60 °, sunlight is perpendicularly irradiated to the cell sheet 200 and the photovoltaic solder ribbon 100, the incident angle of the sunlight on the reflection surface 102 of the front side connection segment 10 of the photovoltaic solder ribbon 100 is 60 °, that is, the reflection angle of the sunlight reflected by the reflection surface 102 is 60 °, and the sunlight perpendicularly irradiated to the photovoltaic solder ribbon 100 can reach the front side of the cell sheet 200 after being reflected by the reflection surface 102 of the front side connection segment 10 of the photovoltaic solder ribbon 100, so that subsequently, the cell sheet 200 receives solar energy and converts the solar energy into electric energy.
In addition, in some embodiments, the sunlight reflected by the reflecting surface 102 of the front connection segment 10 of the photovoltaic solder ribbon 100 reaches the light reflecting surface 301 of the reflecting plate 300, and is reflected again by the light reflecting surface 301 to reach the battery cell 200. For example, the cross section of the front metal layer 11 is implemented as an isosceles triangle, the angle between the first side surface 111 and the second side surface 112 of the front metal layer 11 is 15 °, the angle between the first side surface 111 and the bonding surface 101 is 15 °, and the inclination angle between the reflection surface 102 of the reflection layer 12 formed on the first side surface 111 of the front metal layer 11 and the bonding surface 101 is 15 °. When the front side bonding layer 13 of the front side connecting segment 10 is bonded to the front side of the battery plate 102, the angle of inclination between the reflective surface 102 of the front side reflective layer 12 and the front side of the battery plate 200 is 15 °. Sunlight is perpendicularly irradiated to the battery piece 200 and the photovoltaic solder strip 100, an incident angle of the sunlight to the reflection surface 102 of the front surface connection section 10 of the photovoltaic solder strip 100 is 15 °, that is, a reflection angle of the sunlight reflected by the reflection surface 102 is 15 °, and the sunlight perpendicularly irradiated to the photovoltaic solder strip 100 can reach the reflection surface 301 of the reflection plate 300 after being reflected by the reflection surface 102 of the front surface connection section 10 of the photovoltaic solder strip 100. The reflecting plate 300 is parallel to the cell sheet 200, the incident angle of the sunlight reaching the reflecting plate 300 after being reflected by the reflecting surface 102 of the front surface connecting section 10 on the reflecting surface 301 of the reflecting plate 300 is 15 °, and the sunlight after being reflected again by the reflecting surface 301 of the reflecting plate 300 can reach the front surface of the cell sheet 200, so that the cell sheet 200 receives solar energy and converts the solar energy into electric energy in the subsequent process.
Referring to fig. 11 and 12, in another embodiment of the present invention, a height difference exists between at least two points on the first side surface 111 of the front metal layer 11 and between at least two points on the second side surface 112 of the front metal layer 11, and the extending direction of the extending surface 121 and the reflecting surface 102 of the front reflective layer 12 is the same as the extending direction of the first side surface 11 of the front metal layer 11. That is, neither the first side 111 nor the second side 112 of the front metal layer 11 is parallel to the horizontal plane. Preferably, the first side 111 is convex outward, and the second side 112 is concave inward. For example, a flattened metal wire is bent, such that an upper surface of the metal wire protrudes outward and a lower surface of the metal wire is recessed, thereby manufacturing the front metal layer 11, such that a height difference exists between at least two points on the first side surface 111 of the front metal layer 11, and a height difference exists between at least two points on the second side surface 112 of the front metal layer 11, an extending direction of the extending surface 121 of the front reflective layer 12 disposed on the front metal layer 11 and the reflective surface 102 is parallel to the first side surface 111 of the front metal layer 11, such that a height difference exists between at least two points on the extending surface 121 of the front reflective layer 12, and a height difference exists between at least two points on the reflective surface 102.
The front side bonding layer 13 of the front side connection segment 10 is disposed on the second side surface 112 of the front side metal layer 11, and when the front side bonding layer 13 is bonded on the front side of the cell sheet 200, an inclined angle can be formed between the reflective surface 102 of the front side connection segment 10 and the cell sheet 200, and when sunlight vertically irradiates the photovoltaic solder strip 100 and the cell sheet 200, an incident angle of the sunlight on the reflective surface 102 of the photovoltaic solder strip 100 is less than 90 °, so as to facilitate the sunlight vertically irradiating the photovoltaic solder strip 100 to be directly reflected to the front side of the cell sheet 200 by the reflective surface 102 of the front side connection segment 10. In addition, an included angle is formed between the reflective surface 102 of the front connection segment 10 and the reflective surface 301 of the reflective plate 300, and an incident angle of sunlight, which can be reflected to the reflective surface 301 of the reflective plate 300 by the reflective surface 102, to the reflective surface 301 is smaller than 90 °, so that sunlight perpendicularly irradiated to the photovoltaic solder strip 100 can be reflected by the reflective surface 102 of the front connection segment 10 of the photovoltaic solder strip 100 and the reflective surface 301 of the reflective plate 300 and then utilized.
It should be understood that the shape of the cross-sectional profile of the front metal layer 11 is not limited, and the cross-sectional profile of the front metal layer 11 may be implemented as, but not limited to, a triangle, a semicircle, a trapezoid, a semi-ellipse, a wave, an irregular polygon, etc.
Referring to fig. 11 to 19, in a preferred embodiment of the present invention, the first side surface 111 and the second side surface 112 of the front metal layer 11 are two planes parallel to each other, that is, there is no height difference between points on the first side surface 111, and there is no height difference between points on the second side surface 112. Further, the extended surface 121 of the front reflection layer 12 is a plane, and there is a height difference between at least two points formed on the reflection surface 102 of the front reflection layer 12. In other words, due to the structure of the front reflection layer 12, a height difference exists between at least two points formed on the reflection surface 102 of the front reflection layer 12, so that sunlight perpendicularly irradiated to the photovoltaic solder strip 100 can be utilized.
Preferably, the cross section of the front reflection layer 12 is triangular, that is, the extension surface 121 of the front reflection layer 12 is a plane, and the reflection surface 102 formed on the front reflection layer 12 is composed of two planes extending obliquely to the extension surface 121, as shown in fig. 13 to 15. The front surface reflection layer 12 is provided on the metal reflection layer 11, and an inclination angle can be formed between the reflection surface 102 and the front surface metal layer 11, and an inclination angle can be formed between the reflection surface 102 and the front surface bonding surface held in parallel to the second side surface 112 of the front surface metal layer 11. Further, when the front side bonding layer 13 of the front side connection segment 10 is welded to the cell sheet 200, the first side surface 111 and the second side surface 112 of the front side metal layer 11 of the front side connection segment 10 are parallel to the cell sheet 200, an inclined angle can be formed between the reflection surface 102 of the front side connection segment 10 and the cell sheet 200, and the incident angle of sunlight vertically irradiating the photovoltaic solder strip 100 to the reflection surface 102 of the front side connection segment 10 is smaller than 90 °, so as to facilitate that the sunlight vertically irradiating the photovoltaic solder strip 100 is directly reflected to the front side of the cell sheet 200 by the reflection surface 102 of the front side connection segment 10.
Furthermore, an included angle can be formed between the reflective surface 102 of the front connection segment 10 and the reflective surface 301 of the reflective plate 300 parallel to the battery piece 200, an incident angle of sunlight perpendicularly irradiating the photovoltaic solder strip 100 on the reflective surface 102 of the front connection segment 10 is smaller than 90 °, and an incident angle of sunlight perpendicularly irradiating the photovoltaic solder strip 100 on the reflective surface 301 of the reflective plate 300 is smaller than 90 °, so that sunlight perpendicularly irradiating the photovoltaic solder strip 100 is sequentially reflected by the reflective surface 102 of the front connection segment 10 of the photovoltaic solder strip 100 and the reflective surface 301 of the reflective plate 300 and reaches the front surface of the battery piece 200.
The cross-section of the front reflective layer 12 is embodied as, but not limited to, an isosceles triangle, an equilateral triangle, a right-angled triangle, an obtuse-angled triangle, and an acute-angled triangle. It should be understood that the cross-section of the front side bonding layer 12 may also be implemented as a semicircle, a semi-ellipse, a trapezoid, a pentagon, an irregular polygon, a wave, etc., so that there is a height difference between at least two points on the cross-section of the front side connection segment 10 along the length direction of the front side connection segment 10, referring to fig. 16 to 19. That is, the reflective surface 102 formed on the front metal layer 11 may be formed as a curved surface formed by at least two planes inclined from a horizontal plane, or may be formed as at least one curved surface, or the first side surface 111 may be formed as a plane and a curved surface such that a height difference exists between at least two points on the reflective surface 102. It should be understood that the cross-section of the front surface reflection layer 12 of the present invention refers to a surface that is formed by cutting the front surface metal layer 11 with a plane perpendicular to the length direction of the front surface reflection layer 12.
Referring to fig. 20 to 29B, in other preferred embodiments of the present invention, the front metal layer 11 of the front connection segment 10 of the photovoltaic solder ribbon 100 further includes a soldering portion 113 and a reflection protrusion 114, wherein the reflection protrusion 114 integrally extends upward from the soldering portion 113, the front reflection layer 12 is disposed on the reflection protrusion 114, and the front solder layer 13 is disposed on the soldering portion 113. The first side surface 111 of the front metal layer 11 is formed on the upper surface of the reflective protrusion 114, wherein the second side surface 112 of the front metal layer 11 is formed on the lower surface of the soldering portion 113. Preferably, there is a height difference between at least two points on the upper surface of the reflective protrusion 114, that is, there is a height difference between at least two points on the first side surface 111 of the front side metal layer 11, and the extending direction of the reflective surface 102 formed on the front side reflective layer 12 is consistent with the extending direction of the upper surface of the reflective protrusion 114, so that sunlight perpendicularly irradiated to the photovoltaic solder strip 100 can be utilized after being reflected.
Preferably, the cross section of the welding portion 113 of the front metal layer 11 is rectangular, that is, the second side surface 112 is a plane. It should be understood that the specific shape of the welding portion 113 of the front metal layer 11 is not limited.
Preferably, the cross section of the reflection protrusion 114 of the front metal layer 11 along the length direction of the reflection protrusion 114 is triangular, that is, the first side surface 111 formed on the reflection protrusion 114 is formed by two planes extending obliquely to the edge of the welding portion 113, so that there is a height difference between at least two points on the reflection surface 102 that are consistent with the extending direction of the first side surface 111, as shown in fig. 20 to 25. When the front side bonding layer 13 of the front side connection segment 10 is bonded to the battery sheet 200, the second side surface 112 of the front side metal layer 11 of the front side connection segment 10 is parallel to the battery sheet 200, an included angle can be formed between the reflective surface 102 of the front side connection segment 10 and the battery sheet 200, and an incident angle of sunlight vertically irradiating the photovoltaic solder strip 100 to the reflective surface 102 of the front side connection segment 10 is smaller than 90 °, so that the sunlight vertically irradiating the photovoltaic solder strip 100 is directly reflected to the front side of the battery sheet 200 by the reflective surface 102 of the front side connection segment 10. In addition, an included angle can be formed between the upper surface of the reflective protrusion 114 of the front metal layer 11 soldered to the front connection segment 10 of the battery piece 200 and the reflective surface 301 of the reflective plate 300, and an included angle can be formed between the reflective surface 102 of the front connection segment 10 and the reflective surface 301 of the reflective plate 300, an incident angle of sunlight perpendicularly irradiated to the photovoltaic solder ribbon 100 on the reflective surface 102 of the front connection segment 10 is smaller than 90 °, and an incident angle of sunlight reflected by the reflective surface 102 to the reflective surface 301 of the reflective plate 300 on the reflective surface 301 is smaller than 90 °, so that sunlight perpendicularly irradiated to the photovoltaic solder ribbon 100 is sequentially reflected by the reflective surface 102 of the front connection segment 10 of the photovoltaic solder ribbon 100 and the reflective surface 301 of the reflective plate 300, and reaches the front surface of the battery cell 200.
The cross section of the reflective protrusion 114 of the front metal layer 11 is implemented as, but not limited to, an isosceles triangle, an equilateral triangle, a right-angled triangle, an obtuse-angled triangle, and an acute-angled triangle. It should be understood that the specific shape of the cross-section of the front metal layer 11 is not limited, and the reflective protrusions 114 of the front metal layer 11 may also be implemented in a semicircular shape, a semi-ellipse shape, a trapezoid shape, a pentagon shape, an irregular polygon shape, and the like, and thus there is a height difference between at least two points on the reflective surface 102 of the front connection segment 10, that is, there is a height difference between at least two points on the cross-section of the front connection segment 10 along the length direction of the front connection segment 10, refer to fig. 26 to 29. It should be noted that the specific angles, dimensions and proportions set forth in the drawings and description herein are merely illustrative and are not intended to limit the scope and content of the photovoltaic solder strip 100 of the present invention. It should be understood that the cross section of the reflective protrusion 114 of the front metal layer 11 of the present invention refers to a surface that is formed by cutting the front metal layer 11 with a plane perpendicular to the length direction of the front reflective layer 12.
Referring to fig. 30, the back connection segment 20 of the photovoltaic strip 100 includes a back metal layer 21, a back solder layer 22, and a back coating layer 23, wherein the back solder layer 22 and the back coating layer 23 are respectively disposed on the upper surface and the lower surface of the back metal layer 21, the back metal layer 21 integrally extends from the front metal layer 11 of the front connection segment 10, the back solder layer 21 integrally extends from the front reflection layer 12, and the back reflection layer 23 integrally extends from the front solder layer 13. In a preferred embodiment of the present invention, the upper and lower surfaces of the back metal layer 21, the upper and lower surfaces of the back solder layer 22 and the upper and lower surfaces of the back reflection surface 23 are flat planes. In another preferred embodiment of the present invention, the back connection segment 20 has a concave-convex structure, for example, the back welding layer 22 has a concave-convex surface, or the back metal layer 21 has a concave-convex surface. In other embodiments of the present invention, the structure of the back connector segment 20 is identical to the structure of the front connector segment 10. It should be understood that the specific structure of the back connection segment 20 is only an example and should not be construed as limiting the content and scope of the photovoltaic solder ribbon 100 of the present invention.
In addition, referring to fig. 3A, in order to keep the front surface of each of the connected battery pieces 200 to be maintained at the same level, the photovoltaic solder strip 100 extends obliquely from the front surface of one of the battery pieces 200 to the back surface of the other adjacent battery piece 100, and a portion between the two adjacent battery pieces 200 forms a transition section 30 of the photovoltaic solder strip 100, and it should be understood that the transition section 30 may be implemented as a portion of the front surface connection section 10 and may also be implemented as a portion of the back surface connection section 20. It should be noted that the dimensions and proportions of the photovoltaic device 1000, the photovoltaic solder ribbon 100 and the components thereof shown in the drawings of the present specification are merely illustrative and do not represent actual dimensions and proportions, and should not be construed as limiting the content and scope of the photovoltaic device 1000 and the photovoltaic solder ribbon 100 of the present invention.
The difference between the photovoltaic solder ribbon 100 shown in fig. 30 and 31 of the specification and the photovoltaic solder ribbon 100 shown in fig. 1 to 3 is that the photovoltaic solder ribbon shown in fig. 30 and 31 of the specification comprises at least two front surface connecting sections 10 and at least one back surface connecting section 20, wherein one front surface connecting section 10 extends from the other front surface connecting section 10, and at least two front surface connecting sections 10 are arranged between the adjacent back surface connecting sections 20. At least two front connection segments 10 are welded to the front surface of one of the cell pieces 200, and the rear connection segment 20 is welded to the rear surface of another of the cell pieces 200, so that the front connection segments 10 and the rear connection segments 20 of the photovoltaic solder strip 100 connect the adjacent cell pieces 200 to each other.
According to another aspect of the present invention, the present invention further provides a method of manufacturing a photovoltaic solder ribbon 100.
In the stage shown in fig. 32A of the specification, a metal wire 2000 is provided and a predetermined shape is formed at a predetermined position of the metal wire 2000 at intervals, and a height difference exists between at least two points on an upper surface of the predetermined position of the metal wire 2000 in the predetermined shape, so as to manufacture the front metal layer 11 of a front connection segment 10 of the photovoltaic solder ribbon 100. For example, the shape of the cross-section of the predetermined position of the wire 2000 forming the predetermined shape may be implemented as a triangle, a trapezoid, an irregular polygon, a semicircle, a semi-ellipse, a wave, and the like. In some embodiments of the present invention, the predetermined shape may be continuously formed on the wire. Preferably, the wire 2000 is drawn into a crushing space of a crushing apparatus, and the predetermined position entering the crushing space is crushed to be plastically deformed and formed into the predetermined shape while the wire 2000 is gradually introduced into the crushing space. For example, the rolling device has an annular groove having a cross section with a predetermined shape, the predetermined position of the wire 2000 passes through the annular groove of the rolling device, and the wire 2000 is deformed to form the predetermined shape by an external force of the rolling device.
The material of the wire 2000 is not limited, and the wire may be made of, but not limited to, copper, silver, gold, and alloys thereof, or other materials having good conductive properties.
Preferably, the predetermined position of the wire 2000 is set in a punching mill, wherein the punching mill has the predetermined shape, and the predetermined position of the wire 2000 is formed into the predetermined shape by a punching process.
In the stage shown in fig. 32B of the specification, the portions of the wire 2000 between the predetermined positions are flattened, thereby forming the back metal layers 21 between the front metal layers 11 spaced apart from each other. Preferably, the portions of the wire 2000 between the predetermined positions are crushed, thereby flattening the portions of the wire 2000 between the predetermined positions. Preferably, the portions of the wire 2000 between the preset positions are punched, thereby flattening the portions of the wire 2000 between the preset positions. It should be understood that in some embodiments of the present invention, the order between the step of forming the preset positions of the wire into the preset shape and the step of flattening the portion of the wire 2000 between the preset positions is not limited.
In the stage shown in fig. 32C, a solder layer is formed on the surface of the metal wire 2000 in a manner of adhering to the surface of the metal wire 2000, so as to obtain the photovoltaic solder ribbon 100. Preferably, the metal wire 2000 is immersed in a container containing a welding material, the welding material is a solid-liquid mixture, the welding material is attached to the surface of the metal wire 2000 in a manner of being attached to the surface of the metal wire 2000, and the extending direction of the welding layer formed on the surface of the metal wire 2000 is made to be consistent with the contour of the metal wire. In other words, there is a difference in height between at least two points on the outer surface of the portion of the welding layer corresponding to the preset position of the wire 2000. For example, the wire 2000 is fished out of a container containing the welding material, which has fluidity and moves along the surface of the wire 2000 having a predetermined shape by gravity, so that the extending direction of the welding layer formed at the predetermined position covering the wire 2000 coincides with the extending direction of the surface of the wire 200. Preferably, the welding material is sprayed on the surface of the wire 2000 to form the welding layer. Preferably, the welding material is brushed onto the wire 2000 to form the welding layer. Preferably, the soldering material is made of a material having good soldering performance and good light reflection performance, such as tin, silver, lead, bismuth and alloys thereof, or one or more materials known to those skilled in the art.
It should be noted that after the welding material is sprayed on the surface of the metal wire 2000, a step-by-step adjustment process is performed to uniformly form the welding material on the surface of the metal wire 2000. Since the amount of the welding material sprayed on the wire 2000 is differentiated in the spraying process, the adjusting process can overcome the phenomenon that the welding material is not uniformly formed on the surface of the wire 2000, so as to improve the quality of the photovoltaic welding strip 100.
According to another aspect of the present invention, the present invention further provides a method of manufacturing a photovoltaic solder ribbon 100.
In the stage shown in fig. 33A of the specification, a wire 2000 is provided and the wire 2000 is flattened. Preferably, the wire 2000 is rolled, thereby flattening the wire 2000. Preferably, the wire 2000 is stamped, thereby flattening the wire 2000. Preferably, the wire 2000 is deformed by an external force from a tubular structure to a flat structure.
In the stage shown in fig. 33B of the specification, a predetermined position of the flattened wire 2000 is bent at intervals, so that the predetermined position of the wire 2000 forms a predetermined shape, and a height difference exists between at least two points on the upper surface of the predetermined position of the wire 2000 forming the predetermined shape. For example, the flat wire 2000 is punched such that the upper surface of the wire is protruded outward along the center line and the lower surface is recessed inward along the center line, thereby obtaining the predetermined shape.
In the stage shown in fig. 33C, a solder layer having an extending direction identical to the extending direction of the surface of the wire 2000 is formed on the surface of the wire 2000 to manufacture the photovoltaic solder ribbon 100.
According to another aspect of the present invention, the present invention further provides a method of manufacturing a photovoltaic solder ribbon 100.
In the stage shown in fig. 34A of the specification, a wire 2000 is provided and the wire 2000 is flattened. Preferably, the wire 2000 is rolled, thereby flattening the wire 2000. Preferably, the wire 2000 is stamped, thereby flattening the wire 2000. Preferably, the wire 2000 is flattened by squeezing the wire 2000. It should be understood that the embodiment of the flat wire 2000 is merely exemplary and should not be construed as limiting the scope and content of the method of manufacturing the photovoltaic solder ribbon 100 of the present invention.
In the stage shown in fig. 34B, 34C and 35 of the specification, a welding layer having a predetermined shape is formed on the wire 2000 with a difference in height between at least two points on a cross section of the welding layer. In a preferred embodiment of the present invention, the flattened wire 2000 is placed in a forming mold, and a welding material is injected into the forming mold to form the welding layer with a predetermined shape on the surface of the wire 2000, as shown in fig. 34B. In a preferred embodiment of the present invention, the welding layer may be formed in one injection molding process and wrapped around the wire 2000. In other preferred embodiments of the present invention, the metal wire 2000 may be placed in the forming mold multiple times to form the welding layer having the predetermined shape on the metal wire 2000, and the welding layer may wrap the metal wire 2000. In addition, the shape of the cross section of the welding layer having a predetermined shape may be embodied as a triangle, a trapezoid, an irregular polygon, a semicircle, a semi-ellipse, a wave, and the like. In a preferred embodiment of the present invention, a welding material is coated along the extension direction of the flattened wire 2000, and after the welding material is solidified, a predetermined position of the solidified welding material is cut at intervals, so that a height difference exists between at least two points of the upper surface of the solidified welding material. Referring to fig. 35, in a preferred embodiment of the present invention, the solder layer having a predetermined shape is manufactured by using a grinding tool, and the solder layer is thermally pressed to the wire 2000 to manufacture the photovoltaic solder ribbon, and a height difference exists between at least two points of the upper surface of the photovoltaic solder ribbon 100.
It will be appreciated by persons skilled in the art that the above embodiments are only examples, wherein features of different embodiments may be combined with each other to obtain embodiments which are easily conceivable in accordance with the disclosure of the invention, but which are not explicitly indicated in the drawings.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (31)
1. A photovoltaic solder strip, comprising:
at least one front connecting section; and
at least one back side connection segment extending from the front side connection segment, wherein the front side connection segment has a bonding surface and a reflection surface opposite to the bonding surface, wherein a height difference exists between at least two points on the reflection surface of the front side connection segment.
2. The photovoltaic solder ribbon of claim 1, wherein the front side connection section includes a front side metal layer, a front side reflection layer, and a front side solder layer, wherein the front side metal layer has a first side surface and a second side surface opposite to the first side surface, the front side reflection layer and the front side solder layer are disposed on the first side surface and the second side surface of the front side metal layer, wherein the reflection surface is formed on the front side reflection layer, an extending direction of the reflection surface is identical to an extending direction of the first side surface of the front side metal layer, and a height difference exists between at least two points on the first side surface of the front side metal layer.
3. The photovoltaic solder strip of claim 2 wherein the front side metal layer of the front side connecting segment is triangular in cross-section.
4. The photovoltaic solder strip of claim 2 wherein the front metal layer of the front side connecting segment is trapezoidal in cross-section.
5. The photovoltaic solder strip of claim 2 wherein the front metal layer of the front side connecting section is semi-circular in cross-section.
6. The photovoltaic solder strip of claim 2 wherein the cross-section of the front metal layer of the front connection section is semi-elliptical.
7. The photovoltaic solder strip of claim 2 wherein the front metal layer of the front connector segment is irregular polygonal in cross-section.
8. The photovoltaic solder strip of claim 2 wherein there is a height difference between at least two points on the second side of the front metal layer.
9. The photovoltaic solder ribbon of claim 2, wherein the front metal layer further comprises a solder portion and a reflective bump, wherein the reflective bump extends upward from the solder portion, the first side surface is formed on the reflective bump, and wherein the solder portion has a rectangular cross section.
10. The photovoltaic solder strip of claim 9 wherein the reflective bumps of the front metal layer are triangular in cross-section.
11. The photovoltaic solder strip of claim 9 wherein the reflective bumps of the front metal layer are trapezoidal in cross-section.
12. The photovoltaic solder strip of claim 9 wherein the reflective bumps of the front metal layer are semi-circular in cross-section.
13. The photovoltaic solder strip of claim 9 wherein the reflective bumps of the front metal layer are semi-elliptical in cross-section.
14. The photovoltaic solder strip of claim 9 wherein the reflective bumps of the front metal layer are irregular polygons in cross-section.
15. The photovoltaic solder ribbon of claim 1, wherein the front side connecting section comprises a front side metal layer, a front side reflective layer and a front side solder layer, wherein the front side metal layer has a first side surface and a second side surface opposite to the first side surface, the front side reflective layer and the front side solder layer are disposed on the first side surface and the second side surface of the front side metal layer, wherein the reflective surface is formed on the front side reflective layer, and the first side surface and the second side surface of the front side metal layer are two planes parallel to each other.
16. The photovoltaic solder strip of claim 15 wherein the front side reflective layer of the front side connector segment is triangular in cross-section.
17. The photovoltaic solder strip of claim 15 wherein the front side reflective layer of the front side connector segment is trapezoidal in cross-section.
18. The photovoltaic solder strip of claim 15 wherein the front side reflective layer of the front side connecting segment is semi-circular in cross-section.
19. The photovoltaic solder strip of claim 15 wherein the cross-section of the front reflective layer of the front connecting section is semi-elliptical.
20. The photovoltaic solder strip of claim 15 wherein the front side reflective layer of the front side connector segment has an irregular polygonal cross-section.
21. The photovoltaic solder strip of claim 1 wherein the reflective surface of the front connecting section is formed by at least two planes inclined from the horizontal.
22. The photovoltaic solder strip of claim 1 wherein the reflective surface of the front side connecting section is comprised of at least one curved surface.
23. The photovoltaic solder strip of claim 1 wherein said reflective surface of said front connecting section is comprised of at least one curved surface and one flat surface.
24. A photovoltaic device, comprising:
at least two battery pieces;
a reflecting plate, wherein the reflecting plate is provided with a reflecting surface, and the reflecting plate is held above the battery piece in a manner that the reflecting surface faces the battery piece; and
at least one photovoltaic solder ribbon according to any one of claims 1 to 23, wherein said front side connecting section of said photovoltaic solder ribbon is soldered to the front side of one of said cell pieces, and said back side connecting section of said photovoltaic solder ribbon is soldered to the back side of the other of said cell pieces, and said front side connecting section is located between said cell pieces and said reflective surface of said reflector plate.
25. A manufacturing method of a photovoltaic solder strip is characterized by comprising the following steps:
(a) providing a metal wire; and
(b) and forming a welding layer on the metal wire, wherein at least two points on a reflecting surface of the welding layer have a height difference so as to prepare the photovoltaic welding strip.
26. The method of manufacturing of claim 25, wherein prior to step (b), further comprising step (c): a preset shape is formed at a preset position of the metal wire at intervals, and a height difference exists between at least two points on the upper surface of the preset position of the metal wire which is formed in a preset mode.
27. The method of manufacturing of claim 26, wherein after the step (c), further comprising a step (d): flattening the portion of the wire between the predetermined positions.
28. The method of manufacturing of claim 27, wherein prior to step (b), further comprising step (e): the wire is flattened.
29. The method of manufacturing of claim 28, wherein after step (e), further comprising step (f): bending a preset position of the flattened metal wire at intervals, and enabling the upper surface of the metal wire to be convex outwards.
30. The manufacturing method according to claim 27 or 29, wherein in the step (b), further comprising a step (g): forming the welding layer on the surface of the metal wire, wherein the extending direction of the welding layer is consistent with the extending direction of the surface of the metal wire.
31. The method of manufacturing of claim 30, wherein after the step (e), further comprising a step (f): forming the welding layer having a predetermined shape on the wire, and a height difference exists between at least two points on a cross section of the welding layer having the predetermined shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2018115406181 | 2018-12-17 | ||
| CN201811540618 | 2018-12-17 |
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| CN111261742A true CN111261742A (en) | 2020-06-09 |
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| CN201911227997.3A Pending CN111261742A (en) | 2018-12-17 | 2019-12-04 | Photovoltaic device and photovoltaic solder strip and method of manufacturing the same |
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