CN114639749A - Photovoltaic module and packaging method thereof - Google Patents
Photovoltaic module and packaging method thereof Download PDFInfo
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- CN114639749A CN114639749A CN202210546125.9A CN202210546125A CN114639749A CN 114639749 A CN114639749 A CN 114639749A CN 202210546125 A CN202210546125 A CN 202210546125A CN 114639749 A CN114639749 A CN 114639749A
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 22
- 238000003466 welding Methods 0.000 claims abstract description 48
- 239000002313 adhesive film Substances 0.000 claims abstract description 25
- 239000000853 adhesive Substances 0.000 claims abstract description 19
- 230000001070 adhesive effect Effects 0.000 claims abstract description 19
- 229910000679 solder Inorganic materials 0.000 claims description 23
- 238000005520 cutting process Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000003698 laser cutting Methods 0.000 claims description 3
- 238000012858 packaging process Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 6
- 238000010030 laminating Methods 0.000 description 6
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- 229920005989 resin Polymers 0.000 description 3
- 239000011265 semifinished product Substances 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 229910021419 crystalline silicon Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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- 238000003475 lamination Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- 229910052710 silicon Inorganic materials 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
- H01L31/0516—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 specially adapted for interconnection of back-contact solar cells
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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
- H01L31/048—Encapsulation of modules
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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
- H01L31/18—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
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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
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Manufacturing & Machinery (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to the technical field of photovoltaic modules, and particularly discloses a photovoltaic module and a packaging method thereof, wherein the photovoltaic module comprises a plurality of battery strings, each battery string comprises a plurality of sliced batteries, and U-shaped notches are carved on main grid lines of the sliced batteries along the central line of the main grid lines; the grid line welding strip is connected with the front main grid line and the back main grid line of two adjacent sliced batteries; conductive adhesive is coated at the opening of the U-shaped groove of the main grid line and used for fixing the grid line welding strip; and the adhesive film gasket strip is supported and placed at an included angle between the grid line welding strip and the edge of the sliced battery and is in contact with the edge of the sliced battery. According to the photovoltaic module and the packaging method thereof, the internal stress of the module generated in the production link can be relieved, the yield of qualified products of the module is improved, and the problem of hidden quality troubles of large-size battery modules is effectively solved.
Description
Technical Field
The invention relates to the technical field of photovoltaic modules, in particular to a photovoltaic module and a packaging method thereof.
Background
The photovoltaic module uses a solder strip and a bus bar to connect the battery pieces in series and in parallel, and is formed by packaging materials such as an adhesive film, glass, a back plate and the like. The area that welds that uses between the present battery piece is mostly circular to weld and takes, welds and takes and the grid line is put through the coincidence after, through welding equipment welded connection, and circular welding takes and the contact of battery is approximate to be line contact, and the area that welds between battery and the battery is mostly flatly to be handled, because equipment accuracy limits, can't guarantee every thickness of flattening the part, and the part is flattened and also can appear the problem that position height on one side is low. And after the transmission equipment transmits the front glass coated with the front adhesive film to the proper position, the battery string is horizontally placed in the proper position by the typesetter and is transmitted to the laminating machine after series welding, sticking a positioning adhesive tape, laying a back adhesive film and back glass. The inside of the laminating machine is vacuumized, the pressure of the upper air bag is gradually increased, and the pressure applied to the upper part of the component is increased accordingly. Meanwhile, the adhesive film is heated and melted, and gaps of the assembly are filled. In this case, the battery and the solder strip are greatly stressed, and particularly, the solder strip at the edge part of the battery is not in a smooth arc shape but is in a straight inclined downward direction. The hidden cracking risk of the assembly production link is increased, and the fragmentation of the battery piece can be caused seriously.
In the prior art, as the size of a silicon wafer is gradually increased, the size of the component is increased. Meanwhile, as the market demand for high-power components continues to increase, the fastest way to increase the power of the components is mainly by increasing the number of battery pieces or increasing the size of the battery pieces, and the size of the components also increases. The small spacing of the cell welds is an important factor in reducing the size of the module at the module design level. However, there is no corresponding design for eliminating the internal stress generated in the production link due to the decreased spacing, so the hidden quality problem still needs to be solved.
The application aims to solve the technical problem that the existing small-spacing large-size battery pack has potential quality hazards by providing a large-size battery pack and a packaging method thereof.
Disclosure of Invention
In view of the above, the present application provides a photovoltaic module. The application also provides a packaging method of the photovoltaic module.
In order to achieve the purpose, the invention provides the following technical scheme:
a photovoltaic module comprising a plurality of strings of cells, each string of cells comprising:
the slicing batteries are obtained by cutting large-size battery pieces;
u-shaped carving grooves are carved on the main grid lines of the sliced batteries along the central lines of the main grid lines;
the grid line welding strip is connected with the front main grid line and the back main grid line of two adjacent sliced batteries;
u-shaped grooving is carried out on the main grid line in order to reduce the contact part of the bottom of the grid line welding strip and the main grid line of the battery
Stress is reduced, and hidden cracking fragments generated by internal stress in a production process are reduced, and the specific reason is that the grid line welding strip usually adopts a circular welding strip which is usually in line contact with the main grid line, and U-shaped grooving is carried out on the main grid line, so that the contact area between the grid line welding strip and the main grid line can be increased, and the corresponding stress can be reduced;
the conductive adhesive is coated at the opening of the U-shaped groove of the main grid line and used for fixing the grid line
Welding a strip; the conductive adhesive is used for filling the blank part of the main grid line close to the edge of the battery, the length of the main grid line is shorter than that of the battery, so that the edge part of the battery is free of the main grid line, and in order to reduce the edge stress possibly caused by direct contact between a welding strip and the edge of the battery after welding, the conductive adhesive is coated at the opening of the U-shaped notch and the blank part, so that the conductive adhesive has a buffering effect on the welding strip and is used for welding the welding stress of the battery;
the glue film gasket is supported and placed at an included angle between the grid line welding strip and the edge of the sliced battery and is in contact with the edge of the sliced battery; the adhesive film filler strip fills the suspended part of the welding strip between the two sliced batteries, reduces the pressure of the welding strip on the edges of the batteries during the lamination of the assembly and plays a role in buffering.
Optionally, in the photovoltaic module, the U-shaped groove is scribed by laser.
Optionally, in the photovoltaic module, the sliced cells are a plurality of sliced cells with the same size after being cut.
Optionally, in the photovoltaic module, the grid line solder strip is a circular solder strip, a triangular solder strip, or a sectional solder strip.
A photovoltaic module packaging method comprises the following processes:
carrying out scribing treatment on the main grid line of the cell, and scribing a U-shaped scribing groove with the width smaller than the minimum width of the main grid line and the depth smaller than the height of the main grid line along the central line of the main grid line;
coating conductive adhesive on the opening of the U-shaped notch groove to ensure that the conductive adhesive completely covers the opening of the U-shaped notch groove, and avoiding the short circuit of the battery caused by the communication of the front side and the back side of the battery piece through the conductive adhesive because no redundant conductive adhesive is arranged on the side edge;
connecting a plurality of battery slices in series into a battery string through a grid line welding strip;
connecting a plurality of battery strings in parallel through a bus bar;
and packaging the connected battery strings by using a packaging process of the photovoltaic module to prepare the photovoltaic module.
Optionally, in the photovoltaic module packaging method, before the grid line welding strip is connected, the grid line welding strip is suspended in the air
The adhesive film filler strip is arranged at the position.
Optionally, in the photovoltaic module packaging method, the grid line solder strip is a circular solder strip or a triangular solder strip,
or segmented solder strips.
Optionally, in the photovoltaic module packaging method, the scribing of the main grid line of the cell is performed by laser scribing, or
And scribing by adopting other lossless technologies.
Optionally, in the photovoltaic module packaging method, the cell slice is a plurality of small sliced cells with the same size.
Optionally, in the photovoltaic module packaging method, the sliced cell is a large-sized cell slice which is excited
And (4) carrying out photo-cutting to obtain a plurality of independent sliced batteries with the same specification.
Optionally, in the photovoltaic module packaging method, the sliced cell is obtained by equal-portion laser cutting of a large-size cell, and the specification of the large-size cell is preferably a P-type or N-type cell with a length and a width of 182 × 182mm or 210 × 210 mm.
Since the development of the current device focuses on increasing the power of the device, the power increase caused by the large-sized battery is a large part of the power increase of the device. Because the battery size is great, in order to guarantee that the size of the assembly does not change greatly, the inter-sheet distance of the battery string can be correspondingly reduced, the stress between the welding strip and the battery sheet is increased, the hidden crack risk of the assembly production link is increased, and the battery sheet is cracked seriously.
Compared with the prior art, the photovoltaic module and the photovoltaic module packaging method have the advantages that the problems of hidden cracking and fragmentation of the cell piece caused by the stress of the solder strip in the prior art can be effectively solved, the internal stress of the module generated in the production link is relieved, the yield of qualified products of the module is improved, and the problem of potential quality hazards of large-size cell modules is effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a block diagram of an embodiment of the present invention;
fig. 2 is a schematic diagram of scribing main grid lines of a battery piece in the embodiment of the invention;
FIG. 3 is a schematic diagram of the conductive paste application of a battery plate according to an embodiment of the invention;
FIG. 4 is a front view of the battery plate according to the embodiment of the present invention;
fig. 5 is a side effect view of the welding of the battery plate in the embodiment of the invention.
Wherein: 1-sliced battery, 2-grid line welding strip, 3-conductive adhesive, 4-adhesive film backing strip, 5-1-front adhesive film, 5-2-back adhesive film, 6-1-front glass, 6-2-back packaging material, 11-main grid line and 11-U-shaped groove.
Detailed Description
The application provides a photovoltaic module, which is concretely seen in embodiment one; the application also provides a photovoltaic module packaging method, which is specifically shown in the second embodiment.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The first embodiment is as follows:
the first embodiment of the application provides a photovoltaic module, which comprises a plurality of battery strings, wherein each battery string comprises a plurality of sliced batteries 1, and each sliced battery 1 is a plurality of sliced batteries with the same size, which are obtained by cutting large-size battery pieces through a nondestructive technology;
the main grid lines 11 of the sliced battery 1 are scribed with U-shaped grooves 111, the U-shaped grooves 111 are obtained by scribing along the central lines of the main grid lines 11 through a lossless technology, the scribing width is smaller than the minimum width of the main grid lines 11, and the depth is smaller than the height of the main grid lines 11;
the front main grid lines and the back main grid lines of the adjacent sliced batteries 1 in each battery string are connected through grid line welding strips 2;
before connection, coating a conductive adhesive 3 at the opening of a U-shaped notch 111 of a main grid line 11, placing an adhesive film filler strip 4 at an included angle between a grid line welding strip 2 and the edge of a sliced battery 1, wherein the adhesive film filler strip 4 is positioned at a suspended position of the grid line welding strip 2 and is in contact with the edge of the sliced battery 1, so that the grid line welding strip 2 is supported, and the stress of the grid line welding strip 2 is released;
the conductive adhesive 3 is used for filling the blank part of the main grid line 11 close to the edge of the battery, the length of the main grid line 11 is shorter than that of the sliced battery 1, so that the edge part of the sliced battery 1 has no main grid line 11, and in order to reduce the edge stress possibly caused by the direct contact of the grid line welding strip 2 and the edge of the sliced battery 1 after welding, the conductive adhesive 3 is coated at the opening of the U-shaped notch 111 and the blank part at the section, so that the grid line welding strip 2 is buffered, and the welding stress is relieved;
when the sliced battery 1 is laminated, the front surface of the laminating part (a semi-finished product with the battery laid and the upper and lower adhesive films) is placed downwards, so that the problem that the grid line welding strip 2 and the vertical edge of the sliced battery 1 generate stress exists at the included angle of the front surface, and the stress problem can be solved only by placing the adhesive film filler strip 4 at the included angle.
In some embodiments of the present invention, the adhesive film strip 4 is an EVA adhesive film, a POE adhesive film, or other adhesive films.
In some embodiments of the present invention, the cutting of the large-sized battery piece and the scribing of the main grid line 11 are performed by using a laser technology.
In some embodiments of the present invention, the large-sized cell is a P-type or N-type cell with 182 × 182mm or 210 × 210 mm.
In some embodiments of the present invention, the grid line solder strip 2 is a circular solder strip or a delta solder strip or a segmented solder strip.
Please refer to the summary of the present disclosure, which is not described herein.
Example two:
on the basis of the photovoltaic module, the second embodiment of the application provides a photovoltaic module packaging method, which comprises the following process flows of:
horizontally placing the large-size battery, and cutting the large-size battery into a plurality of sliced batteries 1 with the same size by using laser or other nondestructive cutting technologies along the direction parallel to the fine grid of the battery;
carrying out scribing treatment on the main grid lines 11 of the sliced battery 1, and scribing U-shaped grooves 111 with the width smaller than the minimum width of the main grid lines 11 and the depth smaller than the height of the main grid lines 11 along the middle lines of the main grid lines of the sliced battery 1 by using laser or other nondestructive technologies; the scribed sliced battery 1 is shown in fig. 2;
coating the conducting resin 3 on the opening of the U-shaped notch 111 to ensure that the conducting resin 3 completely covers the opening of the U-shaped notch 111 and no redundant conducting resin 3 is arranged on the side edge; the short circuit of the battery caused by the connection of the front surface and the back surface of the sliced battery 1 through the conductive adhesive 3 is avoided. The covering position of the conductive adhesive 3 is shown in fig. 3.
After the transmission equipment transmits the front glass 6-1 coated with the front adhesive film 5-1 to the right position, a plurality of adhesive film backing strips 4 are placed at the fixed positions of the adhesive films, the battery strings are horizontally placed to the right position by the typesetting machine, the adhesive film backing strips 4 are arranged under the contact positions of each grid line welding strip 2 and the battery edges, and the adhesive film backing strips 4 are positioned at the suspension positions of the grid line welding strips 2;
a plurality of sliced batteries 1 are connected in series into a battery string through a grid line welding strip 2; the sliced batteries 1 are connected by using the technologies of circular welding strips, triangular welding strips, sectional welding strips and the like, the front effect of the sliced batteries 1 after welding is shown in fig. 4, and the side effect is shown in fig. 5.
Connecting a plurality of battery strings in parallel through a bus bar;
performing series welding, sticking a positioning adhesive tape, laying a back adhesive film 5-2 and a back packaging material 6-2 to obtain a laid semi-finished product, wherein the structure is shown in figure 1;
conveying the laid semi-finished product to a laminating machine for laminating;
and (5) after laminating, mounting a frame and a junction box to prepare the finished photovoltaic module.
In some embodiments of the present invention, the sliced cell 1 is formed by laser cutting a large-sized cell, and after the cutting, a plurality of independent sliced cells 1 with the same specification are obtained, and the large-sized cell is a P-type crystalline silicon photovoltaic cell or an N-type crystalline silicon photovoltaic cell with a specification of 182 × 182mm or 210 × 210 mm.
In some embodiments of the invention, the back encapsulant 6-2 is back glass, and the resulting finished photovoltaic module is a double-sided light-transmissive double-sided power generation photovoltaic module.
The photovoltaic module packaging method can relieve the internal stress of the module generated in the production link, improve the yield of qualified products of the module and effectively reduce the problem of hidden quality troubles of large-size battery modules.
The components, devices referred to in this application are meant as illustrative examples only and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the drawings. These components, devices may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".
In the description of the present application, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. It will be further understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings to facilitate the description of the application and to simplify the description, but do not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and thus should not be construed as limiting the application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
It should also be noted that in the apparatus of the present application, the components may be disassembled and/or reassembled. These decompositions and/or recombinations are to be considered as equivalents of the present application.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the application to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modifications, equivalents and the like that are within the spirit and principle of the present application should be included in the scope of the present application.
Claims (9)
1. A photovoltaic module comprising a plurality of strings of cells, wherein a string of cells comprises:
the slicing batteries are obtained by cutting large-size battery pieces;
u-shaped carving grooves are carved on the main grid lines of the sliced batteries along the central lines of the main grid lines;
the grid line welding strip is connected with the front main grid line and the back main grid line of two adjacent sliced batteries;
the conductive adhesive is coated at the opening of the U-shaped groove of the main grid line and used for fixing the grid line
Welding a strip;
and the adhesive film gasket strip is supported and placed at an included angle between the grid line welding strip and the edge of the sliced battery and is in contact with the edge of the sliced battery.
2. The photovoltaic module of claim 1, wherein the U-shaped groove is scribed by a laser.
3. The photovoltaic module of claim 1, wherein the grid line solder strip is a circular solder strip or a delta solder strip.
4. A method of encapsulating a photovoltaic module, comprising:
carrying out scribing treatment on the main grid line of the sliced battery, and scribing a U-shaped scribing groove with the width smaller than the minimum width of the main grid line and the depth smaller than the height of the main grid line along the central line of the main grid line;
coating conductive adhesive on the opening of the U-shaped notch groove to ensure that the conductive adhesive completely covers the opening of the U-shaped notch groove and no redundant conductive adhesive is arranged on the side edge;
connecting a plurality of sliced batteries in series into a battery string through a grid line welding strip;
connecting a plurality of battery strings in parallel through a bus bar;
and packaging the connected battery strings by using a packaging process of the photovoltaic module to prepare the photovoltaic module.
5. The method of claim 4, wherein a tape backing strip is placed in a suspended position on the grid line solder strip before the grid line solder strip is connected.
6. The method of claim 4, wherein the grid line solder strip is a circular solder strip.
7. The photovoltaic module packaging method of claim 4, wherein the scribing of the busbar of the diced cell is performed by laser scribing.
8. The photovoltaic module packaging method according to claim 4, wherein the sliced cells are obtained by equal-part laser cutting of large-size cell slices.
9. The method of claim 8, wherein the large-sized cell sheet has a dimension of 182 x 182mm or 210 x 210 mm.
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| CN202210546125.9A CN114639749A (en) | 2022-05-20 | 2022-05-20 | Photovoltaic module and packaging method thereof |
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| CN202210546125.9A CN114639749A (en) | 2022-05-20 | 2022-05-20 | Photovoltaic module and packaging method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116159726A (en) * | 2022-10-11 | 2023-05-26 | 常州市北达机械制造有限公司 | Novel serial welding method for welding strip and battery piece |
| CN117238984A (en) * | 2023-11-14 | 2023-12-15 | 无锡华晟光伏科技有限公司 | Photovoltaic cell and photovoltaic module |
| WO2023246632A1 (en) * | 2022-06-19 | 2023-12-28 | 中能创光电科技(常州)有限公司 | Preparation method for photovoltaic cell string and preparation method for photovoltaic module |
Citations (8)
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| CN117238984B (en) * | 2023-11-14 | 2024-03-29 | 无锡华晟光伏科技有限公司 | Photovoltaic cell and photovoltaic module |
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