CN113113505A - Slicing solar assembly - Google Patents
Slicing solar assembly Download PDFInfo
- Publication number
- CN113113505A CN113113505A CN202010019959.5A CN202010019959A CN113113505A CN 113113505 A CN113113505 A CN 113113505A CN 202010019959 A CN202010019959 A CN 202010019959A CN 113113505 A CN113113505 A CN 113113505A
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- area
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- bus bar
- busbar
- solar
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Links
- 238000003466 welding Methods 0.000 claims abstract description 34
- 229910000679 solder Inorganic materials 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 230000006872 improvement Effects 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 4
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 3
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012858 packaging process Methods 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000005341 toughened glass Substances 0.000 description 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—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
- H01L31/042—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
- H01L31/0512—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 made of a particular material or composition of materials
-
- 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
-
- 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
Abstract
The invention discloses a sliced solar module which comprises a welding strip, bus bars and solar cells, wherein the bus bars are connected with the solar cells through the welding strip, each bus bar comprises a plurality of first bus bars and a plurality of second bus bars, the first bus bars are positioned at the upper part and the lower part of the module, the second bus bars are positioned in the middle of the module, each first bus bar comprises a first area and a second area, a plurality of holes parallel to the direction of short edges are formed in one side of each first area, holes are not formed in the second area, each second bus bar comprises a third area and a fourth area, a plurality of holes parallel to the direction of the short edges are formed in the two sides of each third area, and holes are not formed in the fourth area. According to the invention, through the improvement of the bus bar structure, the electrical connection reliability of the welding strip and the bus bar is greatly improved, the internal current and the series resistance of the assembly are reduced, and the maximum output power and the reliability of the assembly are improved.
Description
Technical Field
The invention relates to the technical field of solar energy, in particular to a slicing solar energy assembly.
Background
Solar energy is receiving more and more attention as a clean renewable new energy source, the application of the solar energy is more and more extensive, and the most important application of the solar energy is photovoltaic power generation at present. In the specific application, a plurality of solar cell pieces are generally formed into a solar cell module, and then all the solar cell modules are connected to form an integral current output.
The conventional photovoltaic module basically comprises toughened glass, a solar cell and a back plate, wherein an EVA (ethylene vinyl acetate) packaging material is arranged between the toughened glass and the solar cell and between the solar cell and the back plate. During the packaging process of the photovoltaic module, a certain packaging power loss is generated, so that the actual output power of the packaged module is less than the sum of the powers of all the battery pieces. In general, the package loss is largely divided into optical loss and electrical loss. The spectral response range of the silicon solar cell is generally 300nm-1100nm, any factor which reduces the light entering the cell in the wave band can cause optical loss, for example, certain optical loss can be caused by absorption and reflection of toughened glass and EVA to the light, shielding of a welding strip part to the light, and the like. In addition, the mismatch of the electrical properties of the solar cell, the resistance of the solder strip, the bus bar and the junction box, and the contact resistance between different materials can also cause certain electrical losses. For the power loss generated by the resistance, the formula P = I can be used2R, it follows that reducing both current and resistance reduces power loss. The half-piece and laminated piece assemblies on the market at present cut conventional solar cells into 1/2 cells or smaller cells, and reduce the total electrical loss in the assembly packaging process by reducing the working current of single cells, so that the output power of the assembly can be obviously improved. However, because the assembly uses a plurality of sliced battery pieces, the connection among the battery pieces adopts a plurality of series and parallel connection modes to realize reasonable working voltage and current, and more bus bars are used in the assembly. E.g. half-sheet assemblies, typically in groupsThe spare middle part has set up 4 busbar at least, because the middle part busbar is connected with many strings of battery pieces from top to bottom simultaneously, appears welding quality and the problem in the aspect of the outward appearance easily in process of production, for example rosin joint, overwelding, welding pulling force undersize, weld and take the distortion etc.. Particularly for multi-master grid cells, there is a greater chance of welding problems due to more welding points of the ribbon to the bus bar. Therefore, how to avoid these problems in soldering, and ensure long-term reliable electrical connection of the solder and the bus bar and reliability of the assembly is the most technical problem that those skilled in the art need to solve at present.
Disclosure of Invention
The invention aims to solve the problems, greatly improves the electrical connection reliability of the solder strip and the bus bar through the improvement of the bus bar structure, and reduces the internal current and the series resistance of the assembly, thereby reducing the electrical loss and finally improving the maximum output power and the reliability of the assembly.
The invention relates to a slicing solar module which comprises a welding strip, bus bars and solar cells, wherein the bus bars are connected with the solar cells through the welding strip, each bus bar comprises a plurality of first bus bars and a plurality of second bus bars, the first bus bars are positioned at the upper part and the lower part of the module, the second bus bars are positioned in the middle of the module, each first bus bar comprises a first area and a second area, a plurality of holes parallel to the short edge direction are formed in one side of each first area, no hole is formed in each second area, each second bus bar comprises a third area and a fourth area, a plurality of holes parallel to the short edge direction are formed in two sides of each third area, and no hole is formed in each fourth area.
The first area section width of the first bus bar is larger than the second area section width, and the third area section width of the second bus bar is larger than the fourth area section width.
The hole depth of the first region of the first bus bar is smaller than the section width of the first region, and the hole depth of the third region of the second bus bar is smaller than the section width of the first region.
The shape of the first area and the third area is square, circular, semicircular, oval, semi-oval, arc, triangle or polygon.
The number of the third area holes is twice the number of the first area holes.
The holes in the third region on both sides are symmetrically or asymmetrically arranged.
The solder strip and the bus bar are tin-coated copper strips.
The solar cell is a sliced cell.
And the upper surfaces of the welding strips and the bus bars are provided with reflective films.
The thickness of the bus bar is 0.3 mm-1 mm.
Compared with the prior art, the invention has the advantages that: firstly, through set up a plurality of holes in the busbar inside, weld in the area directly penetrates the hole that corresponds and welds, realize the high reliable electrical connection of welding area and busbar for promote from conventional single face welding to four sides welding between welding area and the busbar, weld the area and be connected as a whole with the busbar after the welding, guaranteed welded reliability, avoided welding problems such as rosin joint among the welding process completely. Secondly, because the solder strip welds inside the busbar, the holistic height of welded busbar can not increase, has reduced the influence to the solar wafer who is connected with it, has guaranteed the roughness of face of weld and the aesthetic property of welding outward appearance simultaneously. And the cross section widths of the first area and the third area of the bus bar are larger, so that the overall cross section area of the bus bar is increased, the total resistance of the bus bar is reduced, the power loss caused by the resistance is reduced, and the maximum output power of the assembly is improved. Finally, the reflective films arranged on the upper surfaces of the welding strips and the bus bars have high reflection on sunlight entering the area, the reflected light reaches the surface of a solar cell nearby after being reflected again, the light energy utilization rate of the assembly is improved, and therefore the maximum output power of the assembly is further improved.
Drawings
Fig. 1 is a structural diagram of a solar module according to the present invention.
Fig. 2 is a top view of a first bus bar of the present invention.
Fig. 3 is a front view of a primary bus bar according to the present invention.
Fig. 4 is a top view of a second bus bar of the present invention.
Fig. 5 is a front view of a secondary bus bar according to the present invention.
The solar cell module comprises a solar cell, a solder strip, a bus bar, a first bus bar, a second bus bar, a first area, a second area, a third area, a fourth area, a hole and a reflective film, wherein the solder strip is 1, the bus bar is 2, the solar cell is 3, the first bus bar is 4, the second bus bar is 5, the first area is 6, the second area is 7, the third area is 8, the fourth area is 9, the hole is 10, and the reflective film is.
Detailed Description
For a further understanding of the technical features and content of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings.
As shown in fig. 1, a sliced solar module comprises a solder strip 1, a bus bar 2 and a solar cell 3, wherein the bus bar is connected with the solar cell through the solder strip, the bus bar comprises a plurality of first bus bars 4 and a plurality of second bus bars 5, the first bus bars 4 are positioned at the upper part and the lower part of the module, and the second bus bars 5 are positioned at the middle part of the module. In this embodiment, the solar cell is a half-cut cell, and the module includes 120 such half-cut cells, where every 20 half-cut cells are connected in series to form a cell string, one end of each cell string is connected to the first bus bar, the other end is connected to the second bus bar, every two vertically symmetric cell strings are connected to the second bus bar to realize parallel connection, the number of the first bus bars is 6, and the number of the second bus bars is 4.
As shown in fig. 2 and 3, the first bus bar includes a first region 6 and a second region 7, a plurality of holes 10 parallel to the short side direction are provided in a single side of the first region, and no hole is provided in the second region. In the embodiment, the lower side of the first bus bar at the upper part of the module is provided with 30 square holes totally, the upper side of the first bus bar at the lower part of the module is provided with 30 square holes totally, and the welding strips connected with the uppermost solar cell and the lowermost solar cell penetrate into the square holes arranged in the corresponding first bus bars and are combined into a whole in a welding mode. As shown in fig. 4 and 5, the second bus bar includes a third region 9 and a fourth region 10, a plurality of holes parallel to the short side direction are formed in both sides of the third region, and no hole is formed in the fourth region. The second busbar upside and the downside in subassembly middle part are equipped with 30 square holes respectively in this embodiment, and the solder strip that solar wafer above and below is connected penetrates corresponding second busbar both sides square hole inside and welds as an organic wholely with same mode. Compare in traditional solder strip and busbar single face welded mode, realized the four sides welding between solder strip and the busbar in this embodiment, have bigger face of weld, both connect as a whole after welding completely, consequently solder strip has guaranteed the welded reliability with this kind of connected mode of busbar, has avoided welding problems such as rosin joint in the welding process completely, has realized the high reliable electrical connection between the two. In addition, because the welding position of the welding strip and the bus bar is positioned in the bus bar, the whole height of the welded bus bar cannot be increased, the height difference between the bus bar and a solar cell connected with the bus bar is reduced, the influence on the solar cell is reduced, and the flatness of a welding surface and the attractiveness of the welding appearance are ensured. The hole in the embodiment is a square hole, and may also be a hole of other shapes, such as a circle, a semicircle, an ellipse, a semiellipse, an arc, a triangle, or a polygon, which can achieve the above effects.
The section width of the first region of the first bus bar is larger than or equal to that of the second region, and the section width of the third region of the second bus bar is larger than or equal to that of the fourth region, namely, the section widths of the first region and the third region of the bus bar are larger, so that the whole sectional area of the bus bar is increased, the total resistance of the bus bar is reduced, the electrical loss in the packaging process of the assembly is reduced, and the maximum output power of the assembly is improved. The upper surfaces of the welding strips and the bus bars are provided with the reflective films, the reflective films have high reflection on incident sunlight in the area, the reflective films can enable the light irradiated to the area to be mostly reflected to the surface of the solar cell to be absorbed and utilized again, so that the optical loss caused by shielding of the welding strips on the light is reduced, the light energy utilization rate of the assembly is greatly improved, and the maximum output power and the conversion efficiency of the assembly are further improved.
The above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, based on the above disclosure of the present invention, various changes or modifications can be made in the invention according to the existing technology and knowledge in the field, combined with the basic idea technology of the present invention, and these changes or modifications should fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a section solar energy component, includes solder strip, busbar and solar wafer, its characterized in that: the busbar is connected through welding the area with the solar wafer, the busbar includes a plurality of first busbars and a plurality of second busbar, and first busbar is located subassembly upper portion and lower part, and the second busbar is located the subassembly middle part, first busbar includes first region and second region, and first region unilateral inside is equipped with a plurality of holes that are on a parallel with the minor face direction, and the hole is not established in the second region, the second busbar includes third region and fourth region, and the two inside holes that are on a parallel with the minor face direction that are equipped with of third region two sides, and the hole is not established in the fourth region.
2. The solar module of claim 1, wherein: the first area section width of the first bus bar is larger than the second area section width, and the third area section width of the second bus bar is larger than the fourth area section width.
3. The solar module of claim 1, wherein: the hole depth of the first region of the first bus bar is smaller than the section width of the first region, and the hole depth of the third region of the second bus bar is smaller than the section width of the first region.
4. The solar module of claim 1, wherein: the shape of the first area and the third area is square, circular, semicircular, oval, semi-oval, arc, triangle or polygon.
5. The solar module of claim 1, wherein: the number of the third area holes is twice the number of the first area holes.
6. The solar module of claim 1, wherein: the holes in the third region on both sides are symmetrically or asymmetrically arranged.
7. The solar module of claim 1, wherein: the solder strip and the bus bar are tin-coated copper strips.
8. The solar module of claim 1, wherein: the solar cell is a sliced cell.
9. The solar module of claim 1, wherein: and the upper surfaces of the welding strips and the bus bars are provided with reflective films.
10. The solar module of claim 1, wherein: the thickness of the bus bar is 0.3 mm-1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010019959.5A CN113113505A (en) | 2020-01-09 | 2020-01-09 | Slicing solar assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010019959.5A CN113113505A (en) | 2020-01-09 | 2020-01-09 | Slicing solar assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113113505A true CN113113505A (en) | 2021-07-13 |
Family
ID=76708588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010019959.5A Pending CN113113505A (en) | 2020-01-09 | 2020-01-09 | Slicing solar assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113113505A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113594280A (en) * | 2021-07-29 | 2021-11-02 | 宁夏小牛自动化设备有限公司 | Bus bar, bus bar segment, preparation method of bus bar segment, photovoltaic module and production equipment of photovoltaic module |
-
2020
- 2020-01-09 CN CN202010019959.5A patent/CN113113505A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113594280A (en) * | 2021-07-29 | 2021-11-02 | 宁夏小牛自动化设备有限公司 | Bus bar, bus bar segment, preparation method of bus bar segment, photovoltaic module and production equipment of photovoltaic module |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210713 |
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| WD01 | Invention patent application deemed withdrawn after publication |