CN220510046U - Battery piece and photovoltaic cell - Google Patents
Battery piece and photovoltaic cell Download PDFInfo
- Publication number
- CN220510046U CN220510046U CN202321496355.5U CN202321496355U CN220510046U CN 220510046 U CN220510046 U CN 220510046U CN 202321496355 U CN202321496355 U CN 202321496355U CN 220510046 U CN220510046 U CN 220510046U
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- main grid
- bonding
- welding strip
- photovoltaic cell
- substrate
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- 238000003466 welding Methods 0.000 claims abstract description 68
- 239000000758 substrate Substances 0.000 claims abstract description 40
- 239000000853 adhesive Substances 0.000 claims description 27
- 230000001070 adhesive effect Effects 0.000 claims description 27
- 229910000679 solder Inorganic materials 0.000 claims description 21
- 229920001187 thermosetting polymer Polymers 0.000 claims description 18
- 238000007650 screen-printing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 9
- 239000004332 silver Substances 0.000 description 9
- 229910052709 silver Inorganic materials 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000004831 Hot glue Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The utility model relates to the technical field of photovoltaic cells, in particular to a battery piece and a photovoltaic cell. The battery piece comprises a substrate, wherein a main grid and a bonding part for bonding a welding strip are arranged on the substrate, the welding strip is provided with a connecting part, and when the welding strip is welded with the main grid, the connecting part of the welding strip can be bonded to the bonding part. The photovoltaic cell comprises the cell piece. The utility model provides a battery piece and a photovoltaic cell, which are used for solving the technical problem that in the production process of the photovoltaic cell in the prior art, a welding strip is easy to deviate relative to a main grid so as to influence the production quality of the photovoltaic cell.
Description
Technical Field
The utility model relates to the technical field of photovoltaic cells, in particular to a battery piece and a photovoltaic cell.
Background
In the field of photovoltaic power generation, photovoltaic modules function to receive sunlight and convert electrical energy. The photovoltaic cell comprises a plurality of cell pieces, the cell pieces are connected through welding strips, each cell piece comprises a substrate and silver paste which is printed on the substrate through silk screens, the silver paste forms a main grid on the substrate, the welding strips are welded at the main grid, the main grid is used for assisting in testing the cell and converging and transmitting current collected by the thin grids to the welding strips, and therefore electric connection among the thin grids of the cell pieces is achieved through the welding strips.
However, in the prior art, the dummy solder is very easy to occur in the process of welding between the solder strip and the main grid, so that the solder strip is easy to deviate relative to the main grid in the subsequent photovoltaic cell production process, and the production quality of the photovoltaic cell is affected.
Accordingly, the present application addresses the above-described problems by providing a new battery sheet and photovoltaic cell.
Disclosure of Invention
The utility model aims to provide a battery piece so as to solve the technical problem that in the production process of a photovoltaic cell in the prior art, a welding strip is easy to deviate relative to a main grid to influence the production quality of the photovoltaic cell.
The utility model also aims to provide a photovoltaic cell so as to further solve the technical problem that in the production process of the photovoltaic cell in the prior art, the solder strips are easy to deviate relative to the main grid so as to influence the production quality of the photovoltaic cell.
Based on the first object, the present utility model provides a battery sheet, comprising a substrate;
the substrate is provided with a main grid and an adhesive part for adhering the welding strip, the welding strip is provided with a connecting part, and when the welding strip is welded with the main grid, the connecting part of the welding strip can be adhered to the adhesive part.
Further, the bonding part is thermosetting glue.
Further, the bonding portion is a transparent member.
Further, the adhesive portion is provided to the substrate by screen printing.
Further, the length range of the thermosetting adhesive is 0.5mm-2mm, the width range is 0.5mm-1mm, and the thickness is more than 100um.
Further, the main grid comprises a main grid line and a connection PAD point arranged on the main grid line;
the bonding parts comprise first bonding parts arranged on the main grid lines, a plurality of first bonding parts are arranged, and a plurality of first bonding parts are arranged on the main grid lines at intervals.
Further, the main gate includes a main gate line;
the bonding parts comprise first bonding parts arranged on the main grid lines, a plurality of first bonding parts are arranged, and a plurality of first bonding parts are arranged on the main grid lines at intervals.
Further, the bonding portion further includes a second bonding portion disposed on the substrate and located at a position without the main gate line.
By adopting the technical scheme, the battery piece has the following beneficial effects:
it should be noted that the substrate may be a silicon wafer, and the main grid is silver paste screen printed on the substrate, alternatively, the bonding portion may be an adhesive, for example, a hot melt adhesive, a thermosetting adhesive, or glue. In addition, the connection portion of the solder strip may be any portion of any position on the solder strip, and as long as the connection portion can be formed at a position on the solder strip corresponding to the bonding portion when the solder strip is welded to the main grid.
The arrangement is that the welding strip is welded with the main grid, and meanwhile, the connecting part of the welding strip is bonded with the substrate through the bonding part, so that the bonding part enables the welding strip to be fixed relative to the substrate, and therefore when the welding strip is welded on the main grid, the risk of the welding strip shifting relative to the main grid is reduced, and the production quality of the photovoltaic cell is guaranteed to a certain extent.
Based on the second object, the utility model provides a photovoltaic cell, which comprises a welding strip and a plurality of cell pieces, wherein adjacent cell pieces are connected through the welding strip;
the welding strip is welded with the main grid on the battery piece, and the connecting part of the welding strip is adhered to the adhering part on the battery piece.
Further, the photovoltaic cell is a shingled cell or an MBB cell.
By adopting the technical scheme, the photovoltaic cell has the following beneficial effects:
by arranging the battery piece in the photovoltaic cell, the photovoltaic cell has all the advantages of the battery piece, and the description is omitted herein.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art battery cell;
fig. 2 is a schematic structural view of a photovoltaic cell having the cell sheet shown in fig. 1 (state of the solder tape is not shown);
FIG. 3 is a schematic diagram of a second prior art battery cell;
fig. 4 is a schematic structural view of a photovoltaic cell having the cell sheet shown in fig. 3 (the state of the solder ribbon is not shown);
fig. 5 is a schematic structural diagram of a battery sheet according to an embodiment of the present utility model;
fig. 6 is a second schematic structural diagram of a battery sheet according to an embodiment of the present utility model.
Reference numerals:
1' -substrate;
2' -main gate line;
3' -linked PAD spot;
1-a substrate;
2-an adhesive part;
3-main grid lines;
4-connection PAD point.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the term "connected" should be interpreted broadly, and for example, it may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 5 and 6, the present embodiment provides a battery piece, which includes a substrate 1, a main grid and a bonding portion 2 (not shown) for bonding a solder strip are disposed on the substrate 1, the solder strip is provided with a connecting portion, and the connecting portion of the solder strip can be bonded to the bonding portion 2 when the solder strip is welded to the main grid.
It should be noted that the substrate 1 may be a silicon wafer, and the main grid is silver paste screen printed on the substrate 1, alternatively, the bonding portion 2 may be an adhesive, for example, a hot melt adhesive, a thermosetting adhesive, or glue. The connection portion of the strap may be any portion of any position on the strap, and the portion of the strap corresponding to the adhesive portion 2 may be a connection portion as long as the strap and the main grid can be welded.
In such a setting, when the welding strip is welded with the main grid, the connecting part of the welding strip is also bonded with the substrate 1 through the bonding part 2, so that the bonding part 2 enables the welding strip to be fixed relative to the substrate 1, and therefore, when the welding strip is welded on the main grid, the risk of the welding strip shifting relative to the main grid is reduced, and the production quality of the photovoltaic cell is guaranteed to a certain extent.
Preferably, in this embodiment, the bonding portion 2 is a thermosetting adhesive. By the arrangement, the welding strip is welded to the main grid, and the thermosetting adhesive can be solidified by the welding heat, so that the welding strip can be adhered to the thermosetting adhesive. The thermosetting adhesive can be primarily cured during welding to ensure the firmness of the bonding of the connecting part of the welding strip to the substrate 1, and is completely cured along with the extension of time, so that the welding of the welding strip to the main grid and the bonding of the connecting part of the welding strip to the bonding part 2 are synchronously performed.
Preferably, referring to fig. 5 and 6, in the present embodiment, the bonding portion 2 is a transparent member. The bonding portion 2 is a transparent member, so that when the bonding portion 2 is arranged on the substrate 1, the shielding area of the substrate 1 is not increased, the conversion efficiency of the photovoltaic cell to solar energy can be greatly improved, and the overall size of the bonding portion 2 can be increased, so that the position of the solder strip on the substrate 1 can be better stabilized.
Preferably, in the present embodiment, the adhesive portion 2 is provided to the substrate 1 by screen printing.
Preferably, in this embodiment, the length of the thermosetting adhesive ranges from 0.5mm to 2mm, the width ranges from 0.5mm to 1mm, and the thickness is greater than 100um.
Alternatively, the length of the thermosetting adhesive is 0.5mm, 1mm, 1.5mm or 2mm, etc., the width of the thermosetting adhesive is 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm, etc., and the thickness of the thermosetting adhesive is 100um, 110um, 120um or 130um, etc.
By the arrangement, the tension of the thermosetting adhesive bonding welding strip is increased by the thermosetting adhesive with larger size, and the risk of welding strip deflection is further reduced.
Preferably, referring to fig. 5, in the present embodiment, the main gate includes a main gate line 3 and a PAD connection point 4 disposed on the main gate line 3; the bonding portion 2 includes first bonding portions provided on the main gate line 3, and a plurality of first bonding portions are provided at intervals on the main gate line 3.
It should be noted that, referring to fig. 1 to fig. 4, in the prior art battery sheet, in order to ensure the welding strength between the welding strip and the main grid, a plurality of PAD connection points 3' are arranged on the main grid line 2', wherein if the area of the PAD connection points 3' is larger, the shielding area of the substrate 1 is larger, so that the efficiency of the photovoltaic cell is reduced, and the cost is increased; if the area of the PAD point 3' is smaller, the probability of poor welding between the welding strip and the main grid is increased, and the welding strip is easy to deviate.
Alternatively, the number of the first bonding portions on one main gate line 3 in this embodiment is, for example, two, three, four, five, or the like, and preferably, a plurality of the first bonding portions are uniformly arranged on the main gate line 3.
In this embodiment, especially in the shingle cell or the conventional MBB cell, a plurality of first bonding portions are disposed on the main grid line 3 at intervals, and the function of connecting the solder strips is guaranteed by replacing part of the PAD points 4 with the first bonding portions, so that the number of the PADs 4 connected can be reduced, therefore, the number of the PADs 4 connected with the battery piece in this embodiment is reduced, the shielding area of the substrate 1 can be reduced, the efficiency of the shingle cell is improved, the use amount of silver paste is reduced, and the cost of the shingle cell is reduced.
Preferably, referring to fig. 6, in the present embodiment, the main gate includes a main gate line 3; the bonding portion 2 includes first bonding portions provided on the main gate line 3, and a plurality of first bonding portions are provided at intervals on the main gate line 3.
Alternatively, the number of the first bonding portions on one main gate line 3 in this embodiment is, for example, two, three, four, five, or the like, and preferably, a plurality of the first bonding portions are uniformly arranged on the main gate line 3.
In this embodiment, especially in a conventional MBB battery, a plurality of first bonding portions are disposed on the main gate line 3 at intervals, and the function of connecting the solder strip is guaranteed by replacing the PAD point 4 with the first bonding portions, so that the substrate 1 does not have the PAD point 4, and therefore, the battery sheet of this embodiment further reduces the shielding area of silver paste on the substrate 1 by not using the PAD point 4, improves the efficiency of the shingled battery, reduces the consumption of silver paste, and reduces the cost of the shingled battery.
Preferably, in this embodiment, the bonding portion 2 further includes a second bonding portion (not shown in the drawing), and the second bonding portion is disposed on the substrate 1 and is located where the main gate line 3 is not provided.
The substrate 1 includes a main gate region having the main gate line 3 and a non-main gate region having no main gate line 3, for example, a non-main gate region having no silver paste, and the second bonding portion is located in the non-main gate region.
Wherein, because the width of the welding strip is greater than the width of the main grid line 3 along the length direction perpendicular to the main grid line 3 after the welding strip is arranged along the main grid line 3, wherein the second bonding part can be arranged at the position where the width of the welding strip is greater than the width of the main grid line 3, the connecting part of the welding strip can be bonded at the second bonding part, and by the arrangement, the reliability of the welding strip connected with the substrate 1 and fixed relative to the substrate 1 is further improved, and the welding strip is prevented from deviating relative to the main grid.
Preferably, a plurality of second bonding portions are provided, and the plurality of second bonding portions are provided at intervals along the longitudinal direction of the main grid line 3. Further, the plurality of second bonding portions are uniformly arranged along the length direction of the main gate line 3.
Example two
The second embodiment provides a photovoltaic cell, the photovoltaic cell includes the first embodiment, and the technical features of the first embodiment disclosed are also applicable to the first embodiment, and the technical features of the first embodiment disclosed are not repeated.
The photovoltaic cell provided by the embodiment comprises a welding strip and the battery pieces, wherein a plurality of battery pieces are arranged, and adjacent battery pieces are connected through the welding strip; the welding strip is welded with the main grid on the battery piece, and the connecting part of the welding strip is adhered to the adhering part 2 on the battery piece.
In such a setting, when the welding strip is welded with the main grid on the battery piece, the connecting part of the welding strip is also bonded with the substrate 1 through the bonding part 2, so that the bonding part 2 enables the welding strip to be fixed relative to the substrate 1, and therefore, when the welding strip is welded on the main grid, the risk of the welding strip shifting relative to the main grid is reduced, and the production quality of the photovoltaic cell is guaranteed to a certain extent.
Wherein the photovoltaic cell is a shingle cell or an MBB cell.
In the shingled battery or the MBB battery, the bonding portion 2 may be provided on the main grid line 3 to connect the solder strip, and instead of connecting the PAD point 4, it is preferable that the bonding strength be ensured by increasing the length, width, and/or height of the bonding portion 2, and the solder strip displacement be prevented. For example, the thermoset glue has a length in the range of 0.5mm to 2mm, a width in the range of 0.5mm to 1mm, and a thickness greater than 100um. Therefore, the use of connecting the PAD points 4 is reduced or the connecting the PAD points 4 is not arranged on the substrate 1 at all, the aesthetic property of the outer tube of the photovoltaic cell is improved, and the cost of the photovoltaic cell is reduced due to the reduction of the use amount of silver paste.
The needs to be supplemented are that the PAD point 4 is connected to the MBB battery because of no bonding requirement of the shingle conductive adhesive, and the welding strips are welded on the front side and the back side, so that the setting of the PAD point 4 connected on the front side and the back side can be canceled simultaneously by the mode of the screen printing bonding part 2 on the front side and the back side, and the efficiency improvement and the cost reduction of the photovoltaic battery are higher.
In addition, in the production process of the shingle battery or the MBB battery, the screen printing station of the bonding part 2 is only required to be added in front of a welding machine in a conventional production workshop to screen print the bonding part 2 such as thermosetting adhesive, the equipment design is modified to avoid the position of the printing bonding part 2, the technology can be used, and the modification cost is low and the modification speed is high.
The photovoltaic cell of this embodiment has the advantages of the embodiment one, which are described in detail in embodiment one and are not repeated here.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (7)
1. A battery piece, characterized by comprising a base plate (1);
the substrate (1) is provided with a main grid and a bonding part (2) for bonding a welding strip, the welding strip is provided with a connecting part, and when the welding strip is welded with the main grid, the connecting part of the welding strip can be bonded to the bonding part (2);
the main grid comprises a main grid line (3) and a PAD (PAD) point (4) which is arranged on the main grid line (3); the bonding parts (2) comprise first bonding parts arranged on the main grid lines (3), a plurality of the first bonding parts are arranged, and the first bonding parts are arranged on the main grid lines (3) at intervals; alternatively, the main gate comprises a main gate line (3); the bonding parts (2) comprise first bonding parts arranged on the main grid lines (3), a plurality of the first bonding parts are arranged, and the first bonding parts are arranged on the main grid lines (3) at intervals;
the bonding part (2) further comprises a second bonding part which is arranged on the substrate (1) and is positioned at a position without the main grid line (3);
the second bonding part is arranged at the position where the width of the welding band is larger than that of the main grid line.
2. The battery sheet according to claim 1, wherein the adhesive portion (2) is a thermosetting adhesive.
3. The battery sheet according to claim 2, wherein the adhesive portion (2) is a transparent member.
4. The battery sheet according to claim 2, wherein the adhesive portion (2) is provided to the substrate (1) by screen printing.
5. The battery plate according to claim 2, wherein the thermosetting adhesive has a length ranging from 0.5mm to 2mm and a width ranging from 0.5mm to 1mm, and a thickness greater than 100um.
6. A photovoltaic cell, characterized by comprising a solder strip and a plurality of the cells according to any one of claims 1-5, wherein adjacent cells are connected by the solder strip;
the welding strip is welded with the main grid on the battery piece, and the connecting part of the welding strip is adhered to the adhering part (2) on the battery piece.
7. The photovoltaic cell of claim 6, wherein the photovoltaic cell is a shingled cell or an MBB cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321496355.5U CN220510046U (en) | 2023-06-12 | 2023-06-12 | Battery piece and photovoltaic cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321496355.5U CN220510046U (en) | 2023-06-12 | 2023-06-12 | Battery piece and photovoltaic cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220510046U true CN220510046U (en) | 2024-02-20 |
Family
ID=89869454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321496355.5U Active CN220510046U (en) | 2023-06-12 | 2023-06-12 | Battery piece and photovoltaic cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220510046U (en) |
-
2023
- 2023-06-12 CN CN202321496355.5U patent/CN220510046U/en active Active
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