Battery piece and photovoltaic module
By using spaced silver paste sections to form PAD points in photovoltaic modules, the problem of high photovoltaic module costs is solved, achieving cost reduction without affecting electrical performance.
Patent Information
- Application Number
- CN202420227667.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2034-01-30
AI Technical Summary
In existing photovoltaic modules, the PAD points of the cells are a continuous planar structure, which leads to a large amount of silver used, resulting in high costs. Furthermore, as the price of silver rises, the increase in module costs is difficult to control.
PADs are formed by spaced silver paste sections with a spacing of 10μm-50μm and a height of 1μm-15μm. They are prepared by screen printing, laser transfer or chemical metal deposition. The silver paste sections are interlocked and connected to form a battery string.
While ensuring electrical performance, the amount of silver paste used was reduced, thus lowering the cost of photovoltaic modules, while ensuring the reliability of current transmission.
Smart Images
Figure CN223957893U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photovoltaic power generation technical field especially relates to a battery piece and photovoltaic module. BACKGROUND
[0002] In the photovoltaic power generation field, photovoltaic module plays the role of receiving sunlight and converting electric energy, in order to improve the conversion efficiency of photovoltaic module, the tile technology emerges as the times require.
[0003] The tile technology is that the whole battery piece is cut into several small battery pieces, the adjacent battery pieces are overlapped, and the PAD points of the front and back of the adjacent two battery pieces are connected through the conductive glue, the battery string is formed, there is no gap between the adjacent battery pieces, and the limited light receiving area on the photovoltaic module can output higher power.
[0004] Among them, in order to ensure that the whole battery string has good current transmission, the PAD points for ensuring current transmission are arranged on the front and back of the battery piece in the laminated area, the PAD points are generally silver paste printed on the battery piece, however, with the price rise of metal silver, the manufacturing cost of the battery piece will inevitably rise, so it is of great economic significance to seek a method for reducing the cost of photovoltaic module without affecting the electrical performance of the battery piece for the solar cell industry.
[0005] Therefore, the application provides a new battery piece and photovoltaic module aiming at the above problems. UTILITY MODEL CONTENT
[0006] The utility model aims at providing a battery piece, so as to at least realize reducing the cost of photovoltaic module without affecting the electrical performance of the battery piece.
[0007] The utility model also aims at providing a photovoltaic module, so as to further realize reducing the cost of photovoltaic module without affecting the electrical performance of the battery piece.
[0008] Based on the above first purpose, the utility model provides a battery piece, which comprises a substrate and a PAD point arranged on the substrate, the PAD point comprises a plurality of silver paste parts, and the plurality of silver paste parts are arranged at intervals.
[0009] Further, the silver paste part is a silver paste strip or a silver paste block.
[0010] Further, the plurality of silver paste parts are arranged in a matrix of multiple rows and multiple columns.
[0011] Further, the outer contour shape of the PAD point formed by the plurality of silver paste parts comprises any one or a combination of multiple of a rectangle, a circle, an ellipse or a polygon.
[0012] Further, the interval distance between the adjacent silver paste parts is 10-50 μm, and the height of the silver paste part is 1-15 μm.
[0013] Further, the silver paste part is arranged on the substrate by screen printing, laser transfer printing or chemical metal deposition.
[0014] By using the above technical scheme, the battery piece has at least the following beneficial effects:
[0015] In the prior art, the PAD points on the substrate of the battery piece are continuous planar structures, in the battery piece of the embodiment, the plurality of silver paste parts are arranged at intervals to form the PAD points, that is, in the PAD points, the adjacent silver paste parts are spaced apart by a gap, so that the PAD points are non-continuous structures. By such arrangement, in the photovoltaic module, the PAD points on the front and back surfaces of the adjacent two battery pieces are connected by the conductive adhesive to form a battery string, which can not only ensure the electrical performance of the photovoltaic module, but also save the silver paste consumption of the PAD points, thereby reducing the cost of the photovoltaic module.
[0016] Based on the above second purpose, the utility model provides a kind of photovoltaic module, which comprises the above battery piece.
[0017] Further, the battery piece is provided with a plurality of adjacent first and second battery pieces, the first PAD points on the front surface of the substrate of the first battery piece, and the second PAD points on the back surface of the substrate of the second battery piece, and the first and second PAD points are connected in staggered engagement.
[0018] Further, the first and second PAD points are coated with conductive adhesive.
[0019] Further, the photovoltaic module further comprises a solar backsheet, and the battery piece is fixed to the solar backsheet by EVA adhesive film.
[0020] By using the above technical scheme, the photovoltaic module has at least the following beneficial effects:
[0021] By arranging the above battery piece in the photovoltaic module, the photovoltaic module has all the advantages of the above battery piece, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.
[0023] Figure 1 A structure schematic view of a photovoltaic module provided by the embodiment of the present application is shown in the figure;
[0024] Figure 2 A structure schematic view of a PAD point on a battery piece provided by the embodiment of the present application is shown in the figure;
[0025] Figure 3 A structure schematic view of a PAD point on a battery piece provided by the embodiment of the present application is shown in the figure;
[0026] Figure 4 A structure schematic view of a PAD point on a battery piece provided by the embodiment of the present application is shown in the figure; Figure 2 A structure schematic view of a PAD point on a battery piece provided by the embodiment of the present application is shown in the figure. Figure 3 A structure schematic view of a PAD point on a battery piece provided by the embodiment of the present application is shown in the figure.
[0027] Reference signs:
[0028] 1-Substrate;
[0029] 2-First PAD point;
[0030] 3-Second PAD point;
[0031] 4-Silver paste part;
[0032] 5-Solar backboard;
[0033] 6-EVA adhesive film. DETAILED DESCRIPTION
[0034] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0035] In the description of the present application, it should be noted that the orientations or position relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0036] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, the term "installation", "link", "connection" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.
[0037] Embodiment one
[0038] Please see Figure 1 The embodiment provides a battery piece, which comprises a substrate 1 and a PAD point arranged on the substrate 1, wherein the PAD point comprises a plurality of silver paste parts 4, and the plurality of silver paste parts 4 are arranged at intervals.
[0039] It should be noted that the silver paste part 4 is a silver paste structure arranged on the substrate 1 of the battery piece.
[0040] In the prior art, the PAD point on the substrate 1 of the battery piece is a continuous planar structure, in the battery piece of the embodiment, the plurality of silver paste parts 4 are arranged at intervals to form the PAD point, that is, in the PAD point, there is a gap between adjacent silver paste parts 4, so that the PAD point is a discontinuous structure. Through the conductive adhesive, the PAD points on the front and back surfaces of two adjacent battery pieces in the photovoltaic module are connected to form a battery string, which can ensure the electrical performance of the photovoltaic module and save the silver paste consumption of the PAD point, thereby reducing the cost of the photovoltaic module.
[0041] Optionally, the silver paste part 4 is a silver paste strip or a silver paste block.
[0042] Optionally, the plurality of silver paste parts 4 are arranged in a matrix of multiple rows and multiple columns.
[0043] Optionally, the outer contour shape of the PAD point formed by the plurality of silver paste parts 4 comprises any one or a combination of multiple of a rectangle, a circle, an ellipse or a polygon.
[0044] Optionally, the interval distance between adjacent silver paste parts 4 is 10-50 μm, and the height of the silver paste part 4 is 1-15 μm.
[0045] For example, the interval distance between adjacent silver paste parts 4 is 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm or 50 μm, etc. The height of the silver paste part 4 is 1 μm, 3 μm, 5 μm, 7 μm, 9 μm, 11 μm, 13 μm or 15 μm, etc.
[0046] Optionally, the silver paste part 4 is arranged on the substrate 1 by screen printing, laser transfer printing or chemical metal deposition, and is tightly attached to the surface of the substrate 1 without falling off by high-temperature sintering or other technologies, and the metallization of the silver paste part 4 is realized.
[0047] Embodiment two
[0048] Embodiment two provides a photovoltaic module, which comprises the cell sheet of embodiment one, and the technical features of the cell sheet disclosed in embodiment one are also applicable to this embodiment, and the technical features of the cell sheet disclosed in embodiment one are not described again. The implementation of the photovoltaic module is further described in detail below with reference to the accompanying drawings.
[0049] Please refer to Figure 1 , the photovoltaic module provided in the embodiment comprises the cell sheet.
[0050] Preferably, please refer to Figure 1 , the cell sheet is provided in plurality, and adjacent cell sheets are respectively a first cell sheet and a second cell sheet, the PAD point on the front surface of the substrate 1 of the first cell sheet is a first PAD point 2, and the PAD point on the back surface of the substrate 1 of the second cell sheet is a second PAD point 3, and the first PAD point 2 and the second PAD point 3 are connected in staggered engagement.
[0051] For example, please refer to Figure 2 and Figure 3 , Figure 2 is a schematic view of the first PAD point 2 on the front surface of the substrate 1 of the first cell sheet, Figure 3 is a schematic view of the second PAD point 3 on the back surface of the substrate 1 of the second cell sheet, and the pattern formed after the first PAD point 2 and the second PAD point 3 are connected in staggered engagement is as shown in Figure 4 .
[0052] Preferably, in the embodiment, conductive glue is coated between the first PAD point 2 and the second PAD point 3.
[0053] With such an arrangement, after the first PAD point 2 and the second PAD point 3 are connected in staggered engagement, the outer surfaces of the first PAD point 2 and the second PAD point 3 are adhered together by the conductive glue, further ensuring the reliable transmission of current between adjacent cell sheets.
[0054] Preferably, in the embodiment, the photovoltaic module further comprises a solar back sheet 5, and the cell sheet is fixed to the solar back sheet 5 by an EVA adhesive film 6.
[0055] The photovoltaic module of the embodiment has the advantages of the cell sheet of embodiment one, which has been described in detail in embodiment one and will not be repeated here.
[0056] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A battery sheet, characterized by, The substrate (1) and the PAD points arranged on the substrate (1), the PAD points comprising a plurality of silver paste parts (4), and the plurality of silver paste parts (4) are arranged at intervals.
2. The battery sheet of claim 1, wherein, The silver paste part (4) is a silver paste strip or a silver paste block.
3. The battery sheet of claim 1, wherein, The plurality of silver paste parts (4) are arranged in a matrix of multiple rows and multiple columns.
4. The battery sheet of claim 1, wherein, The outer contour shape of the PAD points formed by the plurality of silver paste parts (4) comprises any one or a combination of multiple of a rectangle, a circle, an ellipse or a polygon.
5. The battery sheet of claim 1, wherein, The interval distance between adjacent silver paste parts (4) is 10-50 μm, and the height of the silver paste part is 1-15 μm.
6. The cell defined in any one of claims 1-5, characterized in that, The silver paste part (4) is arranged on the substrate (1) by screen printing, laser transfer or chemical metal deposition.
7. A photovoltaic module, characterized by The battery piece comprises any one of claims 1-6.
8. The photovoltaic module of claim 7, wherein, The battery pieces are arranged in multiple, and adjacent battery pieces are a first battery piece and a second battery piece, the PAD point on the front surface of the substrate of the first battery piece is a first PAD point (2), the PAD point on the back surface of the substrate of the second battery piece is a second PAD point (3), and the first PAD point (2) and the second PAD point (3) are connected in an interlaced manner.
9. The photovoltaic module of claim 8, wherein, The first PAD point (2) and the second PAD point (3) are coated with conductive adhesive.
10. The photovoltaic module of claim 8, wherein, The photovoltaic module further comprises a solar backsheet (5), and the battery pieces are fixed to the solar backsheet (5) by EVA adhesive film (6).