CN114373833B - Method for improving welding efficiency of multi-main-grid battery string bus bar - Google Patents
Method for improving welding efficiency of multi-main-grid battery string bus bar Download PDFInfo
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- CN114373833B CN114373833B CN202111669605.6A CN202111669605A CN114373833B CN 114373833 B CN114373833 B CN 114373833B CN 202111669605 A CN202111669605 A CN 202111669605A CN 114373833 B CN114373833 B CN 114373833B
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- battery
- welding
- bus bar
- short bus
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- 238000003466 welding Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005520 cutting process Methods 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000005476 soldering Methods 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000005022 packaging material Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0016—Brazing of electronic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—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
-
- 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
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
- H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
-
- 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
Abstract
The invention discloses a method for improving the welding efficiency of a multi-main-grid battery string bus bar, which comprises the following steps: adding a short bus bar feeding mechanism on a traditional battery piece serial welding machine, when the battery pieces are arranged on a conveyor belt, putting two short bus bars 7a protruding the edges of the battery strings on an interconnection bar 10a between two adjacent battery pieces on the conveyor belt, putting two short bus bars 7b protruding the edges of the battery strings on an interconnection bar 10a between two other adjacent battery pieces on the conveyor belt, and arranging the short bus bars 7a and the short bus bars 7b in an orderly AB manner; the battery piece string welding machine then utilizes a conveyor belt to convey the battery pieces into a welding area piece by piece, and the battery pieces are welded with the interconnection strip 10a to form a battery string. The welding mechanism is applicable to welding of any number of grid line battery pieces, has wide applicability, can utilize the welding mechanism of the traditional battery piece serial welding machine to finish welding of the short bus bars at the same time, has strong practicability, and can greatly improve the production efficiency of the photovoltaic module.
Description
Technical Field
The invention relates to the technical field of solar cells, in particular to a method for improving the welding efficiency of a multi-main-grid battery string bus bar.
Background
The solar cell is to increase the number of main grid lines, i.e. 1a-5a in fig. 1, from the original 3 grid line cell 1, 4 grid line cell 2, 5 grid line cell 3 to the current mainstream 9 grid line cell 4 and 12 grid line cell 5, and the future grid lines of the mainstream cell can be expected to be more.
In terms of photovoltaic module production, the main grid line of the battery sheet is changed from 5 grid lines to 12 grid lines, and in the process of welding the bus bar and the battery string, as shown in fig. 2, the number of welding points for welding the bus bar 6 and the 5 grid line battery sheet 3 is 5, and the number of welding points 7 for welding the bus bar 6 and the 12 grid line battery sheet 5 is increased to 12. The increase of welding points can directly increase the workload of operators (manual welding) or equipment (automatic welding), and reduce the working efficiency and the productivity.
In the production of the existing photovoltaic module, tin-plated copper foil is used for manufacturing interconnection strips or welding strips, as shown in fig. 3, according to the number of main grid lines of battery pieces, such as battery pieces 3 of grid lines 5, five rolls of welding strips are used, a mechanical mechanism is utilized to stretch the battery pieces, then the welding strips 9 after cutting are cut off, the welding strips 9 after cutting are grabbed and placed on the main grid lines 3a of the battery pieces, then the welding strips are welded on the battery pieces through a welding device to form connection of a plurality of battery strings, as shown in fig. 4, 12 grid battery pieces are taken as an example, then the interconnection strips 10a between the battery strings are cut off to form battery strings 11 as shown in fig. 5, and the battery strings 11 are sequentially arranged into a matrix as shown in fig. 6 and then welded with bus bars 6 to form a loop. As can be seen from fig. 6, as the number of main grid lines of the battery pieces increases, the number of welding points 7 on the bus bar increases, and if the number of welding points is changed from the 5 grid line battery pieces 3 to the 12 grid line battery pieces, 84 points are added from the original 60 points to 144 points, the workload is increased by 2.4 times no matter for manual operation or mechanical operation, the labor intensity of staff is increased, the production efficiency of the photovoltaic module is affected, and great inconvenience is brought to the production of the photovoltaic module.
Disclosure of Invention
The present invention is directed to a method for improving the welding efficiency of a multi-main-grid battery string bus bar, so as to solve the above-mentioned problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the method for improving the welding efficiency of the bus bars of the multi-main-grid battery string comprises the following steps:
s1, adding a short bus bar feeding mechanism on a traditional battery piece serial welding machine, when the battery pieces are arranged on a conveyor belt, putting two short bus bars 7a protruding out of the edges of the battery strings on an interconnection bar 10a between two adjacent battery pieces on the conveyor belt, putting two short bus bars 7b protruding out of the edges of the battery strings on an interconnection bar 10a between two other adjacent battery pieces on the conveyor belt, and arranging the short bus bars 7a and the short bus bars 7b in an orderly AB arrangement;
s2, conveying the battery pieces into a welding area piece by using a conveying belt by using a battery piece series welding machine, and welding the battery pieces with the interconnection strip 10a to form a battery string;
s3, when the short bus bar 7a in the step 1 is conveyed to a welding area, welding the short bus bar 7a and the interconnection bar 10a, and when the short bus bar 7b in the step 1 is conveyed to the welding area, welding the short bus bar 7b, and welding the short bus bar 7b and the interconnection bar 10 a;
s4, continuously conveying the battery strings forwards through a conveyor belt, and cutting the battery strings from the positions of the interconnection bars 10a when the battery strings reach a cutting mechanism for separating the battery strings, so that the battery strings 11a and 11b with short bus bars can be continuously produced;
s5, arranging the battery strings 11a and 11b in sequence according to the polarities of the battery strings to form a matrix, and overlapping the parts of the adjacent battery strings 11a and 11b protruding the short bus bars with each other, wherein the overlapping position is a short bus bar overlapping part 13;
s6, welding on the short bus bar overlapped part 13 to form a complete loop;
and S7, finally, packaging the battery array in the step S6 by using a packaging material to form the photovoltaic module.
Preferably, in the step S1, the adjacent short bus bars 7a are spaced apart from the short bus bars 7b by four interconnection bars 10a.
Preferably, in the step S1, the protruding cell string edge of the short bus bar 7a is opposite to the protruding cell string edge of the short bus bar 7 b.
Preferably, in the step S1, the directions of the protruding cell string edges of the two short bus bars 7a are the same, and the directions of the protruding cell string edges of the two short bus bars 7b are the same.
Preferably, in the step S6, the short bus bar overlapping portion 13 is soldered by hand or with a soldering apparatus by an electric soldering iron.
Preferably, the number of welding spots in the step S1 to the step S7 is five.
Preferably, the photovoltaic module is a twelve-grid-line cell photovoltaic module.
Preferably, the battery strings in the twelve-grid-line battery piece photovoltaic module are six strings.
Compared with the prior art, the invention has the beneficial effects that: the welding mechanism is applicable to welding of any number of grid line battery pieces, has wide applicability, can utilize the welding mechanism of the traditional battery piece serial welding machine to finish welding of the short bus bars at the same time, has strong practicability, can greatly improve the production efficiency of the photovoltaic module, and particularly brings great convenience to production of the photovoltaic module by manually carrying out operation of the bus bars.
Drawings
FIG. 1 is a schematic diagram of the structures of a 3-grid line cell, a 4-grid line cell, a 5-grid line cell, a 6-grid line cell and a 12-grid line cell in the invention;
FIG. 2 is a schematic diagram of a bus bar and grid cell welded structure according to the present invention;
FIG. 3 is a schematic diagram of a structure of a welding strip and a battery piece in the invention;
FIG. 4 is a schematic view of a 12-grid battery cell according to the present invention;
FIG. 5 is a schematic view of a battery string according to the present invention;
FIG. 6 is a schematic view showing a structure of welding a battery string with a bus bar according to the present invention;
fig. 7 is a schematic view showing a structure in which a short bus bar 7a and a short bus bar 7b are welded in the present invention;
fig. 8 is a schematic diagram of the structure of the battery strings 11a and 11b according to the present invention;
fig. 9 is a schematic view of a battery array according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 7-9, the present invention provides a technical solution: the method for improving the welding efficiency of the bus bars of the multi-main-grid battery string comprises the following steps:
s1, adding a short bus bar feeding mechanism on a traditional battery piece serial welding machine, when the battery pieces are arranged on a conveyor belt, putting two short bus bars 7a protruding out of the edges of the battery strings on an interconnection bar 10a between two adjacent battery pieces on the conveyor belt, putting two short bus bars 7b protruding out of the edges of the battery strings on an interconnection bar 10a between two other adjacent battery pieces on the conveyor belt, and arranging the short bus bars 7a and the short bus bars 7b in an orderly AB arrangement;
s2, conveying the battery pieces into a welding area piece by using a conveying belt by using a battery piece series welding machine, and welding the battery pieces with the interconnection strip 10a to form a battery string;
s3, when the short bus bar 7a in the step 1 is conveyed to a welding area, welding the short bus bar 7a and the interconnection bar 10a, and when the short bus bar 7b in the step 1 is conveyed to the welding area, welding the short bus bar 7b, and welding the short bus bar 7b and the interconnection bar 10 a;
s4, continuously conveying the battery strings forwards through a conveyor belt, and cutting the battery strings from the positions of the interconnection bars 10a when the battery strings reach a cutting mechanism for separating the battery strings, so that the battery strings 11a and 11b with short bus bars can be continuously produced;
s5, arranging the battery strings 11a and 11b in sequence according to the polarities of the battery strings to form a matrix, and overlapping the parts of the adjacent battery strings 11a and 11b protruding the short bus bars with each other, wherein the overlapping position is a short bus bar overlapping part 13;
s6, welding on the short bus bar overlapped part 13 to form a complete loop;
and S7, finally, packaging the battery array in the step S6 by using a packaging material to form the photovoltaic module.
In particular, in step S1, adjacent short bus bars 7a are spaced from short bus bars 7b by four interconnect bars 10a.
In the specific implementation, in step S1, the protruding cell string edge of the short bus bar 7a is opposite to the protruding cell string edge of the short bus bar 7 b.
In the implementation, in step S1, the directions of the protruding cell string edges of the two short bus bars 7a are the same, and the directions of the protruding cell string edges of the two short bus bars 7b are the same.
In the specific implementation, in step S6, soldering is performed on the short bus bar overlapping portion 13 by hand or with a soldering apparatus by means of an electric soldering iron.
In the specific implementation, the number of welding spots in the steps S1-S7 is five.
In specific implementation, the photovoltaic module is a twelve-grid cell photovoltaic module.
In the specific implementation, the battery strings in the twelve-grid-line battery piece photovoltaic module are six strings.
To sum up: as shown in fig. 7, when the battery pieces are welded into strings by using interconnection bars, the short bus bars 7a and 7b are simultaneously placed, the short bus bars 7a and 7b respectively protrude out of the edges of the battery strings in opposite directions, after being cut from the interconnection bars 10a, the battery strings 11a and 11b in two types shown in fig. 8 are formed, after the battery strings 11a and 11b are arranged in sequence to form a matrix shown in fig. 9, the overlapping parts of the battery strings 11a and 11b and the short bus bars 7a and 7b and the short bus bars 7b are welded at the positions shown in fig. 9 and 13, so as to form a final loop, such as the position shown in fig. 9 and 14, thus the number of work load of the series connection can be greatly reduced, and the number of points of the welding bus bars is five welding points, the work load is greatly reduced, and the efficiency and the productivity are further improved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The method for improving the welding efficiency of the multi-main-grid battery string bus bar is characterized by comprising the following steps of: the method comprises the following steps:
s1, adding a short bus bar feeding mechanism on a traditional battery piece serial welding machine, when the battery pieces are arranged on a conveyor belt, putting two short bus bars (7 a) protruding out of the edges of the battery strings on an interconnection bar (10 a) between two adjacent battery pieces on the conveyor belt, putting two short bus bars (7 b) protruding out of the edges of the battery strings on an interconnection bar (10 a) between two other adjacent battery pieces on the conveyor belt, and arranging the short bus bars (7 a) and the short bus bars (7 b) in an ordered AB manner;
s2, conveying the battery pieces into a welding area piece by using a conveying belt by using a battery piece series welding machine, and welding the battery pieces with an interconnection strip (10 a) to form a battery string;
s3, when the short bus bar (7 a) in the step 1 is conveyed to a welding area, welding the short bus bar (7 a) and the interconnection bar (10 a), and when the short bus bar (7 b) in the step 1 is conveyed to the welding area, welding the short bus bar (7 b), and welding the short bus bar (7 b) and the interconnection bar (10 a);
s4, continuously conveying the battery strings forwards through a conveyor belt, and cutting the battery strings from the positions of the interconnection bars (10 a) when the battery strings reach a cutting mechanism for separating the battery strings, so that the battery strings (11 a) and the battery strings (11 b) with the short bus bars can be continuously produced;
s5, arranging the battery strings (11 a) and the battery strings (11 b) in sequence according to the polarities of the battery strings to form a matrix, and overlapping the parts of the adjacent battery strings (11 a) and the battery strings (11 b) protruding out of the short bus bars with each other, wherein the overlapping position is a short bus bar overlapping part (13);
s6, welding on the short bus bar overlapping part (13) to form a complete loop;
and S7, finally, packaging the battery array in the step S6 by using a packaging material to form the photovoltaic module.
2. The method for improving the welding efficiency of the multi-main-grid battery string bus bar according to claim 1, wherein the method comprises the following steps of: in step S1, adjacent short bus bars (7 a) are separated from short bus bars (7 b) by four interconnection bars (10 a).
3. The method for improving the welding efficiency of the multi-main-grid battery string bus bar according to claim 1, wherein the method comprises the following steps of: in the step S1, the protruding cell string edge of the short bus bar (7 a) is opposite to the protruding cell string edge of the short bus bar (7 b).
4. The method for improving the welding efficiency of the multi-main-grid battery string bus bar according to claim 1, wherein the method comprises the following steps of: in the step S1, the directions of the protruding battery string edges of the two short bus bars (7 a) are the same, and the directions of the protruding battery string edges of the two short bus bars (7 b) are the same.
5. The method for improving the welding efficiency of the multi-main-grid battery string bus bar according to claim 1, wherein the method comprises the following steps of: in step S6, the short bus bar overlapping part (13) is welded by hand or by a welding device through an electric soldering iron.
6. The method for improving the welding efficiency of the multi-main-grid battery string bus bar according to claim 1, wherein the method comprises the following steps of: the number of welding spots in the steps S1-S7 is five.
7. The method for improving the welding efficiency of the multi-main-grid battery string bus bar according to claim 1, wherein the method comprises the following steps of: the photovoltaic module is a twelve-grid-line battery piece photovoltaic module.
8. The method for improving the welding efficiency of the multi-main-grid battery string bus bar according to claim 7, wherein: the battery strings in the twelve-grid-line battery piece photovoltaic module are six strings.
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CN114373833B true CN114373833B (en) | 2023-12-26 |
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