Light-transmitting bus bar and photovoltaic module

Abstract

The utility model relates to a light-transmitting bus bar and a photovoltaic assembly. The light-transmitting bus bar comprises a plurality of metal wires and a conductive adhesive layer, and the plurality of metal wires are arranged on the conductive adhesive layer at intervals. According to the light-transmitting bus bar provided by the utility model, light rays can enter from the gaps of the metal wires and penetrate through the bus bar through the conductive adhesive layer, so that a light-transmitting effect is achieved on the basis of not influencing the conductive performance of the bus bar.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic module technical field especially relates to a light transmission busbar and photovoltaic module. BACKGROUND

[0002] Perovskite solar cells have attracted extensive research and market interest due to their excellent photoelectric conversion efficiency and low-cost preparation process. Among them, semi-transparent perovskite solar cells have wide application potential in BIPV, vehicle-mounted, smart agriculture and other fields.

[0003] The current industrialized preparation of large-area perovskite solar cell modules often has the characteristics of high voltage and low current. In the use process, energy conversion is needed, which causes energy loss. An effective solution is to change the large-area module from a full-cell series structure to a partition structure by laser scribing, and then connect each area in parallel through a busbar to make a low-voltage high-current module. However, since the busbar itself is not light-transmitting, it will greatly reduce the overall appearance of the device, so it is urgent to develop a transparent busbar suitable for semi-transparent perovskite solar cell modules. SUMMARY

[0004] Therefore, it is necessary to provide a light-transmitting busbar and photovoltaic module to solve the problem of non-light-transmitting of the traditional busbar.

[0005] A light-transmitting busbar includes a plurality of metal wires and a conductive adhesive layer, and the plurality of metal wires are arranged on the conductive adhesive layer in a spaced manner.

[0006] The light-transmitting busbar described above can allow light to enter through the gaps between the metal wires and penetrate the busbar through the conductive adhesive layer, achieving light-transmitting effect without affecting the conductive performance of the busbar.

[0007] In one embodiment, the metal wire includes at least one of copper wire, silver wire, aluminum wire, and gold wire.

[0008] In one embodiment, the metal wire is a hexahedral metal wire or a cylindrical metal wire.

[0009] In one embodiment, the conductive adhesive layer includes a conductive adhesive film.

[0010] In one embodiment, the conductive adhesive film includes at least one of nickel powder / polyacrylate film and silver powder / acrylate film.

[0011] In one embodiment, the width of the light-transmitting busbar is 3.5-5mm.

[0012] In one of the embodiments, the metal wire has a normal projection width of 0.1-0.5mm on the conductive adhesive layer, and the thickness of the metal wire is 0.2-1mm.

[0013] In one of the embodiments, the thickness of the conductive adhesive layer is 40-80μm.

[0014] In one of the embodiments, the metal wire is at least partially embedded in the conductive adhesive layer.

[0015] The utility model also provides a photovoltaic module, including any one of the light transmission bus bar as above.

[0016] In one of the embodiments, the photovoltaic module includes a first photovoltaic cell unit and a second photovoltaic cell unit, and the light transmission bus bar as any one of the above is pasted on the bus electrode of the first photovoltaic cell unit and the second photovoltaic cell unit, and the first photovoltaic cell unit and the second photovoltaic cell unit are connected in parallel through the light transmission bus bar.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The light transmission bus bar and the photovoltaic module of the utility model can make light enter through the gap of the metal wire and penetrate the bus bar through the conductive adhesive layer, and achieve the light transmission effect without affecting the conductive performance of the bus bar. The photovoltaic module with the light transmission bus bar of the utility model is more in line with the requirements of the application scenarios such as automobile awning, electronic products and glass curtain wall for the appearance and light transmission of photovoltaic modules. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a cross-sectional structure schematic view of the light transmission bus bar in embodiment 1.

[0020] Figure 2 It is a top view structure schematic view of the light transmission bus bar in embodiment 1 and embodiment 2.

[0021] Figure 3 It is a cross-sectional structure schematic view of the light transmission bus bar in embodiment 2.

[0022] Figure 4 It is a photovoltaic module structure schematic view with the light transmission bus bar of the utility model in embodiment 3.

[0023] Mark 1, light transmission bus bar; 11, metal wire; 12, conductive adhesive layer; 2, photovoltaic cell unit; 21, bus electrode of photovoltaic cell. DETAILED DESCRIPTION

[0024] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Furthermore, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Example 1

[0028] A light-transmitting busbar 1, such as Figures 1-2 As shown, the busbar includes multiple metal wires 11 and a conductive adhesive layer 12. The multiple metal wires 11 are spaced apart on the conductive adhesive layer 12 and are at least partially embedded in the conductive adhesive layer 12. Light can enter through the gaps between the metal wires 11, pass through the conductive adhesive layer 12, and penetrate the busbar, achieving a light transmission effect without affecting the conductivity of the busbar.

[0029] The metal wire 11 includes at least one of copper wire, silver wire, aluminum wire, and gold wire, and the metal wire 11 is a hexahedral metal wire. The conductive adhesive layer 12 includes a conductive adhesive film, which includes at least one of nickel powder / polyacrylate film and silver powder / acrylate film.

[0030] The light-transmitting busbar 1 has a width of 3.5-5 mm, each metal wire 11 has a width of 0.1-0.5 mm in the orthographic projection on the conductive adhesive layer 12, the metal wire 11 has a thickness of 0.2-1 mm, and the conductive adhesive layer 12 has a thickness of 40-80 μm.

[0031] Embodiment 2

[0032] A light-transmitting busbar 1, as shown in Figures 2-3 includes a plurality of metal wires 11 and a conductive adhesive layer 12, the plurality of metal wires 11 are arranged on the conductive adhesive layer 12 at intervals and at least partially embedded in the conductive adhesive layer 12. Light can be transmitted through the conductive adhesive layer 12 by the gaps between the metal wires 11 to penetrate the busbar, achieving the light-transmitting effect without affecting the conductive performance of the busbar.

[0033] The metal wire 11 includes at least one of copper wire, silver wire, aluminum wire and gold wire, and the metal wire 11 is a cylindrical metal wire. The conductive adhesive layer 12 includes a conductive adhesive film, and the conductive adhesive film includes at least one of a nickel powder / polyacrylate film and a silver powder / acrylate film.

[0034] The light-transmitting busbar 1 has a width of 3.5-5 mm, each metal wire 11 has a width of 0.1-0.5 mm in the orthographic projection on the conductive adhesive layer 12, the metal wire 11 has a thickness of 0.2-1 mm, and the conductive adhesive layer 12 has a thickness of 40-80 μm.

[0035] Embodiment 3

[0036] A photovoltaic module, as shown in Figure 4 includes a first photovoltaic cell unit 2 and a second photovoltaic cell unit 2, and the bus electrodes of the first photovoltaic cell unit 2 and the second photovoltaic cell unit 2 are pasted with the light-transmitting busbar 1 as shown in Embodiments 1-2, and the first photovoltaic cell unit 2 and the second photovoltaic cell unit 2 are connected in parallel through the light-transmitting busbar 1.

[0037] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that it is within the scope of the description.

[0038] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A light-transmitting busbar, characterized in that, It includes multiple metal wires and a conductive adhesive layer, wherein the multiple metal wires are spaced apart on the conductive adhesive layer.

2. The light-transmitting busbar according to claim 1, characterized in that, The metal wire includes at least one of copper wire, silver wire, aluminum wire, and gold wire.

3. The light-transmitting busbar according to claim 1, characterized in that, The metal wire is a hexahedral metal wire or a cylindrical metal wire.

4. The light-transmitting busbar according to claim 1, characterized in that, The conductive adhesive layer includes a conductive adhesive film.

5. The light-transmitting busbar according to claim 4, characterized in that, The conductive adhesive film includes at least one of nickel powder / polyacrylate film and silver powder / acrylate film.

6. The light-transmitting busbar according to claim 1, characterized in that, The width of the light-transmitting busbar is 3.5-5mm.

7. The light-transmitting busbar according to claim 1, characterized in that, The width of the orthographic projection of each metal wire on the conductive adhesive layer is 0.1-0.5 mm, and the thickness of the metal wire is 0.2-1 mm.

8. The light-transmitting busbar according to claim 1, characterized in that, The thickness of the conductive adhesive layer is 40-80 μm.

9. The light-transmitting busbar according to claim 1, characterized in that, The metal wire is at least partially embedded in the conductive adhesive layer.

10. A photovoltaic module, characterized in that, Including the light-transmitting busbar as described in any one of claims 1 to 9.

Images