Light-transmitting photovoltaic thin film assembly

Abstract

The utility model discloses a light-transmitting photovoltaic thin film assembly, which comprises first toughened glass, a first adhesive film layer, a photovoltaic thin film chip splicing structure, a second adhesive film layer and second toughened glass which are stacked in sequence, and is characterized in that the first toughened glass is adhered to one side of the photovoltaic thin film chip splicing structure through the first adhesive film layer, and the second adhesive film layer is adhered to the other side of the photovoltaic thin film chip splicing structure through the second adhesive film layer; the second tempered glass is adhered to the other side of the photovoltaic thin film chip splicing structure through a second adhesive film layer, the photovoltaic thin film chip splicing structure is formed by splicing a plurality of photovoltaic thin film chips, and every two adjacent photovoltaic thin film chips are adhered and connected into a whole through a hot-pressing zebra conductive adhesive tape; strip-shaped black coating power generation layers and strip-shaped transparent insulation layers are arranged on the surface of the photovoltaic film chip at intervals, the hot-pressing zebra conductive adhesive tape is correspondingly provided with a plurality of black conductors and transparent insulators which are arranged at intervals, and the black conductors and the black coating power generation layers are in one-to-one correspondence in position and identical in width. And the spliced black electric conductor and the black coating power generation layer form the same strip shape.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic field especially relates to a light-transmitting photovoltaic thin film module. BACKGROUND

[0002] With the continuous development of photovoltaic industry, people for solar power development constantly push out new things. In addition to photovoltaic power station, photovoltaic building integrated technology is also developing rapidly, and solar power generation products are integrated into buildings, becoming a new trend. Photovoltaic curtain wall technology emerges as the times require, and the original glass curtain wall is replaced by photovoltaic thin film module to complete the integration of photovoltaic and building.

[0003] The photovoltaic thin film module is pasted between two pieces of glass, but the original photovoltaic chip has some non-light-transmitting area on both sides when making the light-transmitting photovoltaic thin film module. Especially when the size of the module is large, conductive tape is needed to connect the two chips in series. At this time, a non-light-transmitting area appears in the middle of the photovoltaic thin film module, which greatly affects the appearance.

[0004] Therefore, it is necessary to provide a new light-transmitting photovoltaic thin film module. After the photovoltaic chips are spliced, there is no error and no gap, and the power generation efficiency of the photovoltaic thin film module is not affected, and the overall appearance effect of the light-transmitting photovoltaic thin film module is not affected. Utility model content

[0005] The utility model discloses a light-transmitting photovoltaic thin film module, which is not prone to error and has no gap when splicing, and does not affect the power generation efficiency of the photovoltaic thin film module after splicing, and does not affect the overall appearance effect of the light-transmitting photovoltaic thin film module.

[0006] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a light-transmitting photovoltaic thin film module, which comprises first tempered glass, first adhesive film layer, photovoltaic thin film chip splicing structure, second adhesive film layer and second tempered glass which are stacked in sequence. The first tempered glass is bonded to one side of the photovoltaic thin film chip splicing structure through the first adhesive film layer, and the second tempered glass is bonded to the other side of the photovoltaic thin film chip splicing structure through the second adhesive film layer. The photovoltaic thin film chip splicing structure is composed of multiple photovoltaic thin film chips, and the adjacent two photovoltaic thin film chips are integrally connected by hot-pressing zebra conductive tape. The surface of the photovoltaic thin film chip is arranged with a strip-shaped black film-coated power generation layer and a strip-shaped transparent insulating layer. The hot-pressing zebra conductive tape corresponds to multiple black conductors and transparent insulators arranged alternately. The black conductors correspond one-to-one to the positions of the black film-coated power generation layer, and the widths of the black conductors and the black film-coated power generation layer are the same. After splicing, the black conductors and the black film-coated power generation layer form the same strip shape, so that the positive and negative electrodes on every two thin film chips are connected, and the multiple thin film chips are connected in series two by two.

[0007] Further, the first toughened glass and the second toughened glass are both super white toughened glass.

[0008] Further, the photovoltaic thin film chip is a CIGS thin film chip.

[0009] Further, the first adhesive film layer is a white transparent PVB film layer or a colored transparent PVB film layer, and the second adhesive film layer is a white transparent PVB film layer.

[0010] Further, the light transmittance of the photovoltaic thin film chip is the same as that of the hot-pressed zebra conductive adhesive tape.

[0011] Further, the width ratio of the black film-coated power generation layer to the transparent insulating layer on the photovoltaic thin film chip is 2:3 to 3:2.

[0012] Further, the width of the black film-coated power generation layer of the photovoltaic thin film chip is 0.15mm to 1.35mm, and the width of the transparent insulating layer is 0.15mm to 1.35mm; and the sum of the widths of the black film-coated power generation layer and the transparent insulating layer is 1.5mm.

[0013] Further, the hot-pressed zebra conductive adhesive tape comprises a film base layer, a black conductor, and a middle layer formed by alternately arranging the black conductor and a transparent insulator, and an adhesive layer.

[0014] Further, the film base layer is a PET film, the black conductor is a carbon-based, silver-based or carbon-silver-based conductor, and the adhesive layer comprises conductive adhesive and conductive particles.

[0015] The light-transmitting photovoltaic thin film assembly provided by the utility model has the following beneficial effects compared with the prior art: the light-transmitting photovoltaic thin film assembly adopts the hot-pressed zebra conductive adhesive tape formed by alternately arranging the black conductor and the transparent insulator to splice multiple photovoltaic thin film chips, and simultaneously meets multiple requirements of photovoltaic thin film chip splicing: firstly, the multiple photovoltaic thin film chips are connected two by two, the positions of the black conductors and the black film-coated power generation layers are one-to-one corresponding, no error and splicing gap occurs, and the black conductors and the black film-coated power generation layers form the same strip after splicing; secondly, the positive and negative electrodes of the multiple photovoltaic thin film chips are connected two by two, and the power generation efficiency of the photovoltaic thin film assembly is not affected; and finally, the adhesive tape with the same light transmittance as the photovoltaic thin film chip is selected, the black conductive area of the adhesive tape is consistent with the black film-coated power generation layer of the chip, and the overall appearance effect of the light-transmitting photovoltaic thin film assembly is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 is a structural schematic view of a light-transmitting photovoltaic thin film assembly in an embodiment of the utility model;

[0017] Figure 2The side view of the light-transmitting photovoltaic thin film module in the embodiment of the present utility model;

[0018] Figure 3 The top view of the hot-pressed zebra conductive adhesive tape in the embodiment of the present utility model;

[0019] Figure 4 The side view of the hot-pressed zebra conductive adhesive tape in the embodiment of the present utility model;

[0020] Figure 5 The local schematic view of the chip splicing of the light-transmitting photovoltaic thin film module in the embodiment of the present utility model;

[0021] Reference signs in the drawing:

[0022] 1-first toughened glass; 2-first adhesive film layer; 3-photovoltaic thin film chip splicing structure, 31-photovoltaic thin film chip; 32-hot-pressed zebra conductive adhesive tape; 4-second adhesive film layer; 5-second toughened glass; 311-black film-coated power generation layer; 312-transparent insulating layer; 321-black conductor; 322-transparent insulator, 323-thin film base layer, 324-adhesive layer. DETAILED DESCRIPTION

[0023] The present utility model will be further described below in combination with the drawing and the embodiment.

[0024] Please refer to Figures 1-4 The embodiment provides a light-transmitting photovoltaic thin film module, which comprises first toughened glass 1, first adhesive film layer 2, photovoltaic thin film chip splicing structure 3, second adhesive film layer 4 and second toughened glass 5 which are stacked in sequence, the first toughened glass 1 is bonded on one side of the photovoltaic thin film chip splicing structure 3 through the first adhesive film layer 2, the second toughened glass 5 is bonded on the other side of the photovoltaic thin film chip splicing structure 3 through the second adhesive film layer 4, the photovoltaic thin film chip splicing structure 3 is composed of a plurality of photovoltaic thin film chips 31, two adjacent photovoltaic thin film chips 31 are integrally connected through the hot-pressed zebra conductive adhesive tape 32, strip-shaped black film-coated power generation layers 311 and strip-shaped transparent insulating layers 312 are arranged between the surfaces of the photovoltaic thin film chips 31, the hot-pressed zebra conductive adhesive tape 32 corresponds to a plurality of black conductors 321 and transparent insulators 322 which are arranged alternately, the black conductors 321 correspond to the black film-coated power generation layers 311 one by one, the black conductors 321 have the same width as the black film-coated power generation layers 311, the black conductors 321 and the black film-coated power generation layers 311 form the same strip after splicing, so that the positive and negative poles on every two photovoltaic thin film chips 31 are connected, the plurality of photovoltaic thin film chips 31 are connected in series two by two, and the photovoltaic thin film module is not affected in power generation efficiency.

[0025] In a specific embodiment, the first tempered glass 1 and the second tempered glass 5 are both super-white tempered glass, which can have a high light transmission effect and can be seen through from the inside and outside. The photovoltaic thin film module has tempered glass at both ends of the outside, which can meet the installation and use requirements and will not be broken, protecting the photovoltaic thin film chip 31 inside, and has a high light transmission rate, which will not affect the photovoltaic power generation effect. The photovoltaic thin film chip 31 is a CIGS (copper indium gallium selenium) thin film chip. The first adhesive film layer 2 is a white transparent PVB (polyvinyl butyral) film layer or a colored transparent PVB film layer. When the white transparent PVB film layer is selected, the light transmission effect can be high, and the black plated film power generation layer 311 of the photovoltaic thin film chip 31 can be clearly seen. When the colored transparent PVB film layer is selected, the color effect can be seen from a distance while meeting the light transmission effect. The second adhesive film layer 4 is a white transparent PVB film layer. Further, the light transmission of the photovoltaic thin film chip 31 is the same as that of the hot-pressed zebra conductive adhesive tape 32.

[0026] The CIGS photovoltaic thin film chip 31 on the inside can be used by adjusting the width ratio of the black plated film power generation layer 311 and the transparent insulating layer 312 on the photovoltaic thin film chip 31. The width ratio of the black plated film power generation layer 311 and the transparent insulating layer 312 on the photovoltaic thin film chip 31 is preferably 2:3-3:2, and more preferably 1:1. The width of the black plated film power generation layer 311 of the photovoltaic thin film chip 31 is 0.15-1.35 mm, and the width of the transparent insulating layer 312 is 0.15-1.35 mm. The sum of the widths of the black plated film power generation layer 311 and the transparent insulating layer 312 is 1.5 mm.

[0027] Referring to Figure 3 and Figure 4, the light transmittance of the hot-pressed zebra conductive tape 32, by adjusting the width ratio of the black conductor 321 and the transparent insulator 322 in the hot-pressed zebra conductive tape 32, different light transmission effects are achieved, and the specific width should be consistent with the width of the black plated power generation layer 311 and the transparent insulating layer 312 on the CIGS photovoltaic film chip 31. When the size of the photovoltaic film assembly is large, multiple CIGS photovoltaic film chips 31 need to be spliced, and the hot-pressed zebra conductive tape 32 with corresponding light transmittance is pasted between two photovoltaic film chips 31. The hot-pressed zebra conductive tape 32 can connect multiple photovoltaic film chips 31 into one, ensuring that the photovoltaic film chip 31 will not displace and gap during lamination. When the hot-pressed zebra conductive tape 32 is pasted, the position of the black conductor 321 on the hot-pressed zebra conductive tape 32 and the black plated layer 311 of the photovoltaic film chip 31 are overlapped to form the same strip, ensuring that the black conductor 321 area is consistent with the black plated power generation layer 311 area of the photovoltaic film chip 31, and does not affect the overall appearance effect of the light-transmitting photovoltaic film assembly. At the same time, the positive and negative electrodes of each two photovoltaic film chips 31 are connected, ensuring that multiple photovoltaic film chips 31 are successfully connected in series.

[0028] Please refer to Figure 4 The hot-pressed zebra conductive tape 32 sequentially includes a film base layer 323, a black conductor 321, an intermediate layer formed by the interval arrangement of the black conductor 321 and a transparent insulator 322, and a glue layer 325. The film base layer 323 is a PET (polyethylene terephthalate) film, the black conductor 321 is a carbon-based, silver-based or carbon-silver-based conductor, and the glue layer 325 includes conductive glue and conductive particles.

[0029] Although the utility model has disclosed as above with preferred embodiments, it is not used to limit the utility model, any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be defined by the claims.

Claims

1. A light-transmitting photovoltaic thin-film module, characterized by: The light-transmitting photovoltaic film assembly comprises a first tempered glass, a first adhesive film layer, a photovoltaic film chip splicing structure, a second adhesive film layer and a second tempered glass which are sequentially stacked, the first tempered glass is bonded to one side of the photovoltaic film chip splicing structure through the first adhesive film layer, the second tempered glass is bonded to the other side of the photovoltaic film chip splicing structure through the second adhesive film layer, the photovoltaic film chip splicing structure is composed of a plurality of photovoltaic film chips which are integrally connected by hot-pressing zebra conductive adhesive tape between adjacent two photovoltaic film chips, the surface of the photovoltaic film chip is arranged with a strip-shaped black film-coated power generation layer and a strip-shaped transparent insulating layer, the hot-pressing zebra conductive adhesive tape corresponds to a plurality of black conductors and transparent insulators which are arranged alternately, the black conductors correspond to the black film-coated power generation layers one by one, the black conductors have the same width as the black film-coated power generation layers, the black conductors and the black film-coated power generation layers form the same strip after splicing, so that the positive and negative electrodes on every two photovoltaic film chips are connected, and the plurality of photovoltaic film chips are connected in series two by two.

2. The light-transmitting photovoltaic thin-film module of claim 1, wherein: The first tempered glass and the second tempered glass are both super-white tempered glass.

3. The light-transmitting photovoltaic thin-film module of claim 1, wherein: The photovoltaic film chip is a CIGS thin film chip.

4. The light-transmitting photovoltaic thin-film device of claim 1, wherein: The first adhesive film layer is a white transparent PVB film layer or a colored transparent PVB film layer, and the second adhesive film layer is a white transparent PVB film layer.

5. The light-transmitting photovoltaic thin-film device of claim 1, wherein: The light transmittance of the photovoltaic film chip is the same as the light transmittance of the hot-pressing zebra conductive adhesive tape.

6. The light-transmitting photovoltaic thin-film device of claim 1, wherein, The width ratio of the black film-coated power generation layer to the transparent insulating layer on the photovoltaic film chip is 2:3-3:

2.

7. The light-transmitting photovoltaic thin-film device of claim 1, wherein, The width of the black film-coated power generation layer of the photovoltaic film chip is 0.15-1.35 mm, and the width of the transparent insulating layer is 0.15-1.35 mm; and the sum of the widths of the black film-coated power generation layer and the transparent insulating layer is 1.5 mm.

8. The light-transmitting photovoltaic thin-film device of claim 1, wherein, The hot-pressing zebra conductive adhesive tape comprises a film base layer, an intermediate layer in which black conductors and transparent insulators are arranged alternately, and a glue layer.

9. The light-transmitting photovoltaic thin-film module of claim 8, wherein, The film base layer is a PET film, the black conductors are carbon-based, silver-based or carbon-silver-based conductors, and the glue layer comprises conductive glue and conductive particles.

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