Crystalline silicon cell photovoltaic module

Abstract

The utility model discloses a crystalline silicon cell photovoltaic assembly, which comprises light receiving glass, a first adhesive film, a crystalline silicon cell, a second adhesive film and back plate glass which are sequentially arranged from top to bottom, the crystalline silicon cell comprises a plurality of cell strings, the cell strings are arranged into an array, bus bars are arranged at the two ends of the array, and the bus bars are arranged on the back plate glass. The bus bar is electrically connected with the battery string, a first color matching layer is arranged between the bus bar and the battery string, and the upper surface of the bus bar is covered with a second color matching layer. According to the crystalline silicon cell photovoltaic assembly provided by the utility model, the problem of chromatic aberration between the crystalline silicon cell and the bus bar is solved through the first color matching layer and the second color matching layer, and meanwhile, the surface of the bus bar and the surface of the welding strip between the bus bar and the cell string are insulated, so that short circuit caused by contact between the bus bar and the cell string is prevented.

Description

Technical Field

[0001] The utility model belongs to the field of photovoltaic modules, and particularly relates to a crystalline silicon cell photovoltaic module. Background Art

[0002] With the maturity of the development of the photovoltaic industry, the combination of photovoltaic and architecture realizes building-integrated photovoltaics, including various forms such as roofs, facades, windows, sheds, and canopies. For photovoltaic products in non-transparent areas of the building's facade, namely glass curtain walls, also known as power generation glass, solar power generation is achieved through photovoltaic modules inside the glass curtain wall.

[0003] In the prior art, such as a crystalline silicon cell module disclosed in Chinese published patent CN 110620162 A, battery strings are arranged in parallel or in series to improve the output power of the module. However, in the prior art, the crystalline silicon cell itself is black and opaque, resulting in a certain color difference between the crystalline silicon cell and the bus bar. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a crystalline silicon cell photovoltaic module to solve the problem of a certain color difference between the crystalline silicon cell and the bus bar in the prior art.

[0005] To this end, the utility model provides a crystalline silicon cell photovoltaic module, including: a light-receiving glass, a first encapsulant film, a crystalline silicon cell, a second encapsulant film, and a backsheet glass arranged in sequence from top to bottom. The crystalline silicon cell includes a plurality of battery strings, the battery strings are arranged in an array, bus bars are arranged at both ends of the array, the bus bars are electrically connected to the battery strings, a first color adjustment layer is arranged between the bus bars and the battery strings, and a second color adjustment layer covers the upper surface of the bus bars.

[0006] Preferably, the battery string is formed by connecting a plurality of battery cells together through welding tapes, the battery cells are arranged in a row, and there is a spacing between the battery cells.

[0007] Preferably, the length range W1 of the spacing between the battery cells is 0 < W1 ≤ 5 mm.

[0008] Preferably, a third color adjustment layer is arranged on the upper surface of the welding tape.

[0009] Preferably, the third color adjustment layer includes a first film strip layer and a second film strip layer, and the first film strip layer covers the upper surface of the second film strip layer. There is a certain gap between the battery cells, exposing the silver-white welding tape, and the third color adjustment layer can solve the problem of color difference between the battery cells and the welding tape. At the same time, the third color adjustment layer can also form an insulating layer on the surface of the welding tape to prevent short circuit between the battery cells.

[0010] Preferably, the thickness range of the first film strip layer is 15 - 60 μm, and the thickness range of the second film strip layer is 10 - 40 μm.

[0011] Preferably, the material of the first film strip layer is PET.

[0012] Preferably, the material of the second film strip layer is EVA.

[0013] Preferably, an ink layer is provided on the backplane glass.

[0014] Preferably, a fourth color adjustment layer is provided on the back surface of the backplane glass.

[0015] More preferably, the material of the fourth color adjustment layer is PVB.

[0016] Preferably, the first color adjustment layer is the same as the third color adjustment layer. There is a certain gap between the battery string and the bus bar, and the battery string and the bus bar are connected by a solder strip. The first color adjustment layer can solve the problem of a certain color difference between the crystalline silicon battery and the bus bar, and can also insulate the surface of the solder strip between the battery string and the bus bar to prevent short - circuit.

[0017] Preferably, the first color adjustment layer is replaced by a PVB spacer strip, which is filled between the battery string and the bus bar.

[0018] Preferably, the second color adjustment layer is the same as the third color adjustment layer. The conventional bus bar is a tinned copper strip with a silver - white surface. The second color adjustment layer can cover the surface of the bus bar, solve the problem of a certain color difference between the crystalline silicon battery and the bus bar, and can also insulate the surface of the bus bar to prevent the bus bar from contacting the surface of the battery string and causing short - circuit.

[0019] Preferably, the second color adjustment layer is replaced by an insulating coating.

[0020] Beneficial effects:

[0021] 1. The present utility model provides a crystalline silicon battery photovoltaic module. The first color adjustment layer and the second color adjustment layer solve the problem of color difference between the crystalline silicon battery and the bus bar, and at the same time insulate the surface of the bus bar and the surface of the solder strip between the bus bar and the battery string, preventing the bus bar from contacting the battery string to cause short - circuit.

[0022] 2. There is a certain gap between the battery cells in the present utility model, exposing the silver - white solder strip. The third color adjustment layer can solve the problem of color difference between the battery cells and the solder strip, and at the same time the third color adjustment layer can also form an insulating layer on the surface of the solder strip to prevent short - circuit between the battery cells. Description of the drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 The front view of Embodiment 1 of a crystalline silicon cell photovoltaic module provided by the present invention.

[0025] Figure 2 The top view of Embodiment 1 of a crystalline silicon cell photovoltaic module provided by the present invention.

[0026] Figure 3 The schematic diagram of the connection between the bus bar and the cell string of Embodiment 1 of a crystalline silicon cell photovoltaic module provided by the present invention.

[0027] Figure 4 The schematic diagram of the connection of cell wafers of Embodiment 1 of a crystalline silicon cell photovoltaic module provided by the present invention.

[0028] In the figure, 1 - light-receiving glass, 2 - first encapsulant film, 3 - crystalline silicon cell, 31 - cell string, 32 - bus bar, 33 - first color adjustment layer, 34 - second color adjustment layer, 311 - cell wafer, 312 - solder ribbon, 313 - third color adjustment layer, 3131 - first film belt layer, 3132 - second film belt layer, 4 - second encapsulant film, 5 - backplane glass, 51 - ink layer, 52 - fourth color adjustment layer. Detailed implementation manners

[0029] The content of the present invention can be more easily understood by referring to the following detailed description of the preferred implementation methods of the present invention and the included embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. When there is a contradiction, the definition in this specification shall prevail.

[0030] Embodiment 1:

[0031] The present invention provides a crystalline silicon cell photovoltaic module, which solves the problem of color difference between the crystalline silicon cell and the bus bar through the first color adjustment layer and the second color adjustment layer, and at the same time insulates the surface of the bus bar and the surface of the solder ribbon between the bus bar and the cell string, preventing short circuit caused by the contact between the bus bar and the cell string.

[0032] Provided as Figures 1-4A crystalline silicon cell photovoltaic module as shown includes, from top to bottom in sequence, a light-receiving glass 1, a first encapsulant film 2, a crystalline silicon cell 3, a second encapsulant film 4, and a backsheet glass 5. The crystalline silicon cell 3 includes a plurality of cell strings 31. The cell strings 31 are arranged in an array along the horizontal direction. Busbars 32 are provided at both ends of the inner array. The busbars 32 are electrically connected to the cell strings 31. A first color-adjusting layer 33 is provided between the busbars 32 and the cell strings 31. The upper surface of the busbars 32 is covered with a second color-adjusting layer 34.

[0033] The cell string 31 is formed by connecting a plurality of cells 311 together through solder tapes 312. The cells 311 are arranged in a row with a spacing between them. The spacing length W1 between the cells 311 is 1 mm. A third color-adjusting layer 313 is provided on the upper surface of the solder tapes 312. The third color-adjusting layer 313 includes a first film layer 3131 and a second film layer 3132. The first film layer 3131 covers the upper surface of the second film layer 3132. The thickness range of the first film layer 3131 is 30 μm, and the thickness range of the second film layer 3132 is 25 μm. The material of the first film layer 3131 is PET. The material of the second film layer 3132 is EVA. There is a certain gap between the cells 311, exposing the silver-white solder tapes 312. The third color-adjusting layer 313 can solve the problem of color difference between the cells 311 and the solder tapes 312. At the same time, the third color-adjusting layer 313 can also form an insulating layer on the surface of the solder tapes 312 to prevent short circuit between the cells 311.

[0034] An ink layer 51 is provided on the backsheet glass 5.

[0035] A fourth color-adjusting layer 52 is provided on the back surface of the backsheet glass 5. The material of the fourth color-adjusting layer 52 is PVB.

[0036] The first color-adjusting layer 33 is the same as the third color-adjusting layer 313. There is a certain gap between the cell string 31 and the busbar 32. The cell string 31 and the busbar 32 are connected through a solder tape 312. The first color-adjusting layer 33 can solve the problem of a certain color difference between the crystalline silicon cell 3 and the busbar 32, and can also insulate the surface of the solder tape 312 between the cell string 31 and the busbar 32 to prevent short circuit.

[0037] The second color-adjusting layer 34 is the same as the third color-adjusting layer 313. A conventional busbar 32 is a tinned copper strip with a silver-white surface. The second color-adjusting layer 34 can cover the surface of the busbar 32, solve the problem of a certain color difference between the crystalline silicon cell 3 and the busbar 32, and can also insulate the surface of the busbar 32 to prevent short circuit due to contact between the surface of the busbar 32 and the cell string 31.

[0038] Example 2:

[0039] The difference between Example 2 and Example 1 is that the first color - adjusting layer 33 is a PVB spacer bar, which is filled between the battery string 31 and the bus bar 32.

[0040] Example 3:

[0041] The difference between Example 3 and Example 1 is that the second color - adjusting layer 34 is an insulating coating. The insulating coating uses black insulating paint.

Claims

1. A crystalline silicon cell photovoltaic module, characterized in that: include: The light-receiving glass, the first adhesive film, the crystalline silicon cell, the second adhesive film and the back glass are arranged in sequence from top to bottom. The crystalline silicon cell includes a plurality of cell strings, and the cell strings are arranged in an array. Bus bars are arranged at both ends of the array, and the bus bars are electrically connected to the cell strings. A first color adjustment layer is arranged between the bus bar and the cell strings, and the upper surface of the bus bar is covered with a second color adjustment layer.

2. A crystalline silicon cell photovoltaic module according to claim 1, characterized in that: The battery string is composed of a plurality of battery cells connected together by welding strips, the battery cells are arranged in a row, and there are intervals between the battery cells.

3. A crystalline silicon cell photovoltaic module according to claim 2, characterized in that: The length range of the spacing W1 between the battery cells is 0 <W1≤5mm。 4. A crystalline silicon cell photovoltaic module according to claim 3, characterized in that: A third color adjustment layer is arranged on the upper surface of the welding strip.

5. A crystalline silicon cell photovoltaic module according to claim 4, characterized in that: The third color adjustment layer includes a first film tape layer and a second film tape layer, wherein the first film tape layer covers an upper surface of the second film tape layer.

6. A crystalline silicon cell photovoltaic module according to claim 5, characterized in that: The thickness of the first film tape layer is in the range of 15-60 μm, and the thickness of the second film tape layer is in the range of 10-40 μm.

7. A crystalline silicon cell photovoltaic module according to claim 6, characterized in that: The material of the first film tape layer is PET.

8. A crystalline silicon cell photovoltaic module according to claim 6, characterized in that: The material of the second film tape layer is EVA.

9. The crystalline silicon cell photovoltaic module according to claim 1, characterized in that: An ink layer is arranged on the back plate glass.

10. A crystalline silicon cell photovoltaic module according to claim 1, characterized in that: A fourth color adjustment layer is arranged on the back side of the back plate glass.

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