CN217485462U - Novel photovoltaic module - Google Patents
Novel photovoltaic module Download PDFInfo
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- CN217485462U CN217485462U CN202221013844.6U CN202221013844U CN217485462U CN 217485462 U CN217485462 U CN 217485462U CN 202221013844 U CN202221013844 U CN 202221013844U CN 217485462 U CN217485462 U CN 217485462U
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Abstract
The utility model relates to the technical field of photovoltaic modules, and discloses a novel photovoltaic module, which comprises a battery string, wherein the battery string comprises an invisible adhesive tape, a welding strip and a battery piece; the invisible adhesive tape comprises an adhesive layer and a bearing layer adhered to one side surface of the adhesive layer; the middle part of the other side surface of the bonding layer is bonded with a welding strip, and the end part of the bonding layer is bonded with a non-main grid area of the battery piece, so that the welding strip is pressed and connected to the main grid area of the battery piece; the adhesive layer is an EVA adhesive layer or a POE adhesive layer. According to the novel photovoltaic module, the low-temperature welding of the welding strip and the main grid region of the battery piece can be realized through the invisible adhesive tape, the battery piece defect caused by high-temperature infrared welding is avoided, the welding yield is improved, and the product percent of pass is improved; in addition, as the invisible adhesive tape is in a fixed state, waiting time does not need to be reserved after welding, the welding period can be shortened, the welding efficiency is improved, and the production efficiency of the photovoltaic module is improved; during welding, the fixed invisible adhesive tape can be pulled and positioned through the rotating shaft to realize accurate welding of the welding strip and the grid line.
Description
Technical Field
The utility model relates to a photovoltaic module technical field, concretely relates to novel photovoltaic module.
Background
In the existing photovoltaic module, the conventional welding mode is infrared welding, which is a non-contact high-temperature welding method, and the high-temperature welding work between the grid lines and the welding strips of the battery pieces is completed by selecting infrared rays with proper wavelengths to perform radiant heating on welding spots. Due to the fact that infrared welding has the defects that focal length adjustment is inaccurate, the heating area is too high and too wide, insufficient soldering, over-soldering, even soldering splinters or hidden cracks are easily caused, and stress is generated on a battery piece, and the problems are common defects of infrared welding.
In the current photovoltaic market, the thickness of a mainstream silicon wafer is 170 μm, and theoretically, even if the thickness of the silicon wafer is reduced to 80 μm, the effect on the efficiency of a cell is not great, and the investment of the silicon wafer can be effectively reduced, so that the current photovoltaic cell is gradually trying to evolve towards flaking, which is one of the development trends of the future photovoltaic cell. However, the thinner the silicon wafer, the higher the chipping rate of the cell, the higher the toughness requirement of the cell, and the loss when cutting the cell increases. With the development of the photovoltaic cell flaking trend, infrared welding is not suitable for flaking photovoltaic cells because of the common defects that the infrared welding easily causes insufficient soldering, over soldering, even solder cracking or hidden cracking, and the cell pieces generate stress.
In the prior art, for example, publication No. CN105097068B provides a conductive adhesive, a low-temperature cured conductive adhesive is used to effectively adhere a solder strip to a battery contact point, the curing temperature of the conductive adhesive is low, the generated thermal stress is small, and low-temperature welding can be realized, so that the bending, subfissure and breakage ratios of battery pieces are effectively reduced. However, the conductive adhesive is in a flowing state, and it is necessary to lay the conductive adhesive on the welding spot of the solder strip, place the battery piece on the conductive adhesive, make the main grid region of the battery piece contact with the conductive adhesive, and then heat the conductive adhesive to cure and form the laid flowing conductive adhesive. Therefore, the conductive paste has the following disadvantages: before curing and forming, the flowing conductive adhesive is easy to diffuse to the periphery, so that accurate welding between the welding strip and the main grid region of the cell can not be realized, and the quality of a photovoltaic module is influenced; moreover, the flowing conductive adhesive needs to be heated and cured and then can be molded, so that after the conductive adhesive is laid, the waiting time for curing and molding of the conductive adhesive needs to be reserved additionally, the welding period of the photovoltaic cell can be prolonged, the welding efficiency is reduced, and the production efficiency of the photovoltaic module is further reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's is not enough, provides a novel photovoltaic module to improve its welding yield, shorten welding cycle, realize accurate welding, and then improve photovoltaic module's quality.
Based on the structure, the utility model discloses a novel photovoltaic module, which comprises a battery string, wherein the battery string comprises an invisible adhesive tape, a welding tape and a battery piece; the invisible adhesive tape comprises a bonding layer and a bearing layer which is bonded on one side surface of the bonding layer; the middle part of the other side surface of the bonding layer is bonded with the welding strip, and the end part of the bonding layer is bonded with the non-main grid area of the battery piece, so that the welding strip is in pressure joint with the main grid area of the battery piece; the adhesive layer is an EVA adhesive layer or a POE adhesive layer.
Preferably, the invisible adhesive tape is provided with a plurality of air exhaust through holes penetrating through the adhesive layer and the bearing layer.
Further preferably, a plurality of the air vent through holes are arranged at equal intervals in the middle position of the invisible adhesive tape.
Further preferably, the aperture of the exhaust through hole is 1-3 mm.
Preferably, the thickness of the invisible adhesive tape is 5-500 μm; the carrier layer is preferably a PET layer.
Preferably, the shape of the invisible adhesive tape is cross-shaped, scissor-shaped, Y-shaped, rice-shaped or circular.
Preferably, the welding strip is a round wire welding strip, a flat welding strip or a triangular welding strip.
Preferably, the thickness of the battery piece is 80-160 μm, and the number of the main grids is 9-22.
Preferably, a novel photovoltaic module, still including stacking in proper order and locating first glued membrane and the front bezel of battery cluster front surface to and stack in proper order and locate second glued membrane and the backplate of battery cluster rear surface.
Further preferably, the gram weight of the first adhesive film and the gram weight of the second adhesive film are 300-620g/m 2 。
Compared with the prior art, the utility model discloses at least, including following beneficial effect:
in the novel photovoltaic module, the bearing layer plays a role in bearing, supporting and shaping the bonding layer, so that the invisible adhesive tape becomes a welding product with a fixed state; during welding, the end part of the bonding layer is bonded in the non-main grid region of the battery piece, so that a welding strip bonded in the middle of the bonding layer is just in pressure joint with the main grid region of the battery piece, and the bonding layer is an EVA bonding layer or a POE bonding layer, so that the low-temperature bonding force of the invisible adhesive tape is strong, and the welding strip and the main grid of the battery piece can be compacted at low temperature; moreover, because the invisible adhesive tape is a fixed welding product, waiting time does not need to be reserved after welding, the invisible adhesive tape can directly flow into the next procedure, the welding period can be shortened, the welding efficiency is improved, and the production efficiency of the photovoltaic module is further improved; this stealthy sticky tape of stationary state can carry out the spool and accomodate, so, the separation of the stealthy sticky tape of accessible pivot traction realization main bars region and non-main bars region during the welding to can realize welding the accurate welding of area and grid line.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a novel photovoltaic module according to this embodiment.
Fig. 2 is a schematic cross-sectional structure diagram of a cell string in the photovoltaic module according to this embodiment.
Fig. 3 is a schematic cross-sectional structure view of an invisible adhesive tape in the photovoltaic module according to the present embodiment.
Fig. 4 is a top view of the invisible adhesive tape in the photovoltaic module according to the present embodiment.
The reference numbers illustrate: a front plate 1; a first adhesive film 2; a battery string 3; a concealed adhesive tape 31; a carrier layer 311; a bonding layer 312; an exhaust through hole 313; a solder ribbon 32; a battery piece 33; a non-main gate region 331; a main gate region 332; a second adhesive film 4; a back plate 5.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the following detailed description.
Examples
The novel photovoltaic module of this embodiment, see fig. 1-2, includes a battery string 3, a first glue film 2 and a front plate 1 stacked on the front surface of the battery string 3 in sequence, and a second glue film 4 and a back plate 5 stacked on the back surface of the battery string 3 in sequence. Wherein, the front plate 1 is preferably glass, and the back plate 5 can also be glass; the battery piece 33 comprises, but is not limited to 1/2 pieces, 1/3 pieces and 1/4 pieces, the thickness of the battery piece 33 is 80-160 μm, and the number of the main grids comprises, but is not limited to, 9-22 grids; the gram weights of the first adhesive film 2 and the second adhesive film 4 are controlled to be 300-620g/m 2 To meet the packaging requirements.
Referring to fig. 2-3, the battery string 3 includes an invisible adhesive tape 31, a welding tape 32 and a battery sheet 33, the invisible adhesive tape 31 includes an adhesive layer 312 and a bearing layer 311 adhered to one side of the adhesive layer 312; for example, as shown in fig. 3, the carrier layer 311 is adhered to the upper side of the adhesive layer 312. The bearing layer 311 is preferably a PET layer and is manufactured by extrusion molding, the bearing layer 311 is transparent, the molding effect is good, after lamination, the bearing layer 311 is in a transparent invisible state, and the bearing layer 311 plays a role in shaping, bearing and supporting the bonding layer 312, so that the invisible adhesive tape 31 forms a fixed product for welding.
Furthermore, the middle part of the other side (the following side) of the adhesive layer 312 is bonded with the solder strip 32, and the end part of the other side (the following side) of the adhesive layer 312 is bonded with the non-main grid area 331 of the battery piece 33, so that one side (such as the lower side of the solder strip 32) of the solder strip 32 far away from the adhesive layer 312 is just pressed and connected with the main grid area 332 of the battery piece 33, thus the welding work of the solder strip 32 and the main grid area 332 of the battery piece 33 is realized through the invisible adhesive tape 31, and then the soldering tin on the surface of the low-temperature solder strip 32 is melted through the laminating process, so that the solder strip 32 and the main grid can realize current conduction. Moreover, compared with the prior art that welding is realized between the welding strip and the main grid region of the cell through the flowing conductive adhesive, the invisible adhesive tape 31 is a fixed welding product and is not in a flowing state, so that waiting time does not need to be reserved after welding, and the invisible adhesive tape can directly flow into the next step of the process, thereby shortening the welding period, improving the welding efficiency and further improving the production efficiency of the photovoltaic module.
This stealthy sticky tape 31 formula design as an organic whole, be fit for the batchization, large-scale production, this stealthy sticky tape 31 is equipped with and plays the design, bear and support effect's carrier layer 311, consequently can the spool accomodate after dispatching from the factory, so take up an area of the space little, do benefit to storage and transportation, and this fixed state and the stealthy sticky tape 31 that the spool was accomodate, can pull the separation that realizes the stealthy sticky tape 31 of main bars region 332 and non-main bars region 331 through the pivot in transmission process, thereby can realize welding the accurate crimping of area 32 and grid line, firm in connection after low temperature welding and subsequent lamination in crimping position, be difficult for droing.
Wherein, the bonding layer 312 is an EVA bonding layer or a POE bonding layer. Because the melting points of the EVA bonding layer and the POE bonding layer are low, the EVA bonding layer or the POE bonding layer on the bearing layer 311 is slightly melted and sticky by adopting low temperature (such as 50-230 ℃) in the welding process, so that the bonding between the bonding layer 312 and the non-main grid area 331 of the battery piece 33 and between the bonding layer 312 and the welding strip 32 can be firmer, and the welding quality of the welding strip 32 and the main grid area 332 of the battery piece 33 can be improved; the invisible adhesive tape 31 with the EVA bonding layer or the POE bonding layer has strong low-temperature bonding force, the welding tape 32 and the main grid of the cell 33 can be tightly compacted at low temperature, the series connection of the invisible adhesive tape 31 and the cell 33 is realized, the defect that the cell 33 generates stress due to insufficient welding, over-welding, even welding splinters or hidden cracks caused by too high and too wide heated area of the cell 33 under the existing infrared welding of the laminated photovoltaic cell can be effectively overcome by the low-temperature welding, the conditions of bending, over-welding, grid breaking and splintering of the cell 33 due to the influence of high-temperature infrared welding are effectively avoided, the fragment rate of the manufacturing process is reduced, the welding yield is improved, and the production quality and the product qualification rate of the photovoltaic module can be improved.
Specifically, the solder ribbon 32 includes, but is not limited to, a round wire solder ribbon, a flat solder ribbon, or a fillet solder ribbon. The solder ribbon 32 has various types, specifications and models, such as SnPb + Ag, SnPb, SnPbBi, SnPbBiLn, SnPbBi + Ag, and SnPbBiLn + Ag.
Specifically, the thickness of the invisible adhesive tape 31 is 5 μm to 500 μm, the thickness of the whole invisible adhesive tape 31 is properly reduced, and after subsequent lamination, the thickness of the invisible adhesive tape 31 is not increased, and even the thickness of the packaged photovoltaic module can be further reduced, so that the thinned invisible adhesive tape 31 can be better suitable for a flaked photovoltaic cell and a photovoltaic module thereof, and the packaging cost can be reduced by reducing the thickness of the invisible adhesive tape 31. Further, for the laminated photovoltaic module, the thickness of the cell sheet 33 can be reduced to thin and thin the main grid, so that the consumption of silver paste is reduced, and the thickness of the adhesive film is reduced to further reduce the cost.
Specifically, the shape of the invisible tape 31 is cross-shaped (as shown in fig. 4), scissors-shaped, Y-shaped, m-shaped, or circular, preferably cross-shaped, scissors-shaped, Y-shaped, or m-shaped, so that the invisible tape 31 has a plurality of end portions to be bonded to the non-main grid region 331 of the battery sheet 33, and the plurality of end portions are dispersed in different directions of the non-main grid region 331 of the battery sheet 33, so that the bonding is more firm, and since the end portions of the invisible tape 31 are separated, even if the solder 32 having a certain thickness is bonded to the middle portion of the invisible tape 31, the end portions of the invisible tape 31 can be smoothly and snugly bonded to the non-main grid region 331 of the battery sheet 33.
Further, the invisible adhesive tape 31 is provided with a plurality of exhaust through holes 313 (shown in fig. 4) penetrating through the adhesive layer 312 and the bearing layer 311, the plurality of exhaust through holes 313 are preferably arranged at the middle position of the invisible adhesive tape 31 at equal intervals, but not at the edge of the invisible adhesive tape 31, and the aperture of the exhaust through holes 313 is preferably 1-3 mm; the exhaust through hole 313 is used for exhausting air at the adhered part in the battery string 3 in the low-temperature welding and laminating process of the battery string 3 so as to prevent poor adhesion of the invisible adhesive tape 31 due to a gap left at the adhered part, and further enable the adhesion between the adhesive layer 312 and the non-main grid area 331 of the battery piece 33 and between the adhesive layer 312 and the welding strip 32 to be firmer, improve the welding quality of the welding strip 32 and the main grid area 332 of the battery piece 33 and improve the quality of a photovoltaic module.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the invention.
The technical solution provided by the present invention is described in detail above, and the principle and the implementation of the present invention are explained by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (10)
1. The novel photovoltaic module is characterized by comprising a battery string, wherein the battery string comprises an invisible adhesive tape, a welding tape and a battery piece; the invisible adhesive tape comprises a bonding layer and a bearing layer which is bonded on one side surface of the bonding layer; the middle part of the other side surface of the bonding layer is bonded with the welding strip, and the end part of the bonding layer is bonded with the non-main grid area of the battery piece, so that the welding strip is pressed and connected to the main grid area of the battery piece; the adhesive layer is an EVA adhesive layer or a POE adhesive layer.
2. The photovoltaic module of claim 1, wherein the invisible adhesive tape defines a plurality of venting through holes extending through the adhesive layer and the carrier layer.
3. The photovoltaic module as claimed in claim 2, wherein the plurality of vent holes are arranged at equal intervals in the middle of the invisible adhesive tape.
4. The novel photovoltaic module according to claim 2, wherein the diameter of the vent through hole is 1-3 mm.
5. The novel photovoltaic module according to claim 1, characterized in that the thickness of the invisible adhesive tape is 5 μm to 500 μm; the bearing layer is a PET layer.
6. The novel photovoltaic module of claim 1, wherein the shape of the invisible adhesive tape is cross-shaped, scissors-shaped, Y-shaped, rice-shaped or circular.
7. The novel photovoltaic module of claim 1, wherein the solder strip is a round wire solder strip, a flat solder strip, or a delta solder strip.
8. The novel photovoltaic module according to claim 1, characterized in that the thickness of the cell sheet is 80-160 μm, and the number of the main grids is 9-22 grids.
9. The photovoltaic module of claim 1, further comprising a first adhesive film and a front plate sequentially stacked on the front surface of the battery string, and a second adhesive film and a back plate sequentially stacked on the back surface of the battery string.
10. The photovoltaic module as claimed in claim 9, wherein the grammage of the first and second adhesive films is 300-620g/m 2 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221013844.6U CN217485462U (en) | 2022-04-28 | 2022-04-28 | Novel photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221013844.6U CN217485462U (en) | 2022-04-28 | 2022-04-28 | Novel photovoltaic module |
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| CN217485462U true CN217485462U (en) | 2022-09-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115295655A (en) * | 2022-10-08 | 2022-11-04 | 浙江制能科技有限公司 | IBC battery pack and manufacturing method thereof |
| CN117855336A (en) * | 2024-01-31 | 2024-04-09 | 江苏皓兮新能源技术开发有限公司 | Manufacturing method of solar photovoltaic battery assembly |
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2022
- 2022-04-28 CN CN202221013844.6U patent/CN217485462U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115295655A (en) * | 2022-10-08 | 2022-11-04 | 浙江制能科技有限公司 | IBC battery pack and manufacturing method thereof |
| CN117855336A (en) * | 2024-01-31 | 2024-04-09 | 江苏皓兮新能源技术开发有限公司 | Manufacturing method of solar photovoltaic battery assembly |
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