Perovskite solar cell photovoltaic module packaging structure

Abstract

The utility model discloses a packaging structure of a perovskite solar cell photovoltaic assembly. The structure comprises conductive glass, a perovskite chip layer, a packaging adhesive film, packaging glass and a photovoltaic junction box which are arranged from bottom to top, the perovskite chip layer and the packaging adhesive film are packaged between the conductive glass and the packaging glass, and the periphery of the perovskite chip layer is packaged by butyl adhesive tapes. The photovoltaic junction box is installed on the top of the packaging glass, a spacer layer is arranged in the photovoltaic junction box and divides the photovoltaic junction box into an outer area and an inner area, the outer area is filled with pouring sealant, and super absorbent resin is arranged in the inner area. According to the perovskite solar cell photovoltaic assembly packaging structure, the photovoltaic junction box is processed into an inner area and an outer area, the outer area is used for prolonging a water vapor erosion path, and the inner area is used for absorbing water vapor penetrating through the pouring sealant area, so that the problem of water vapor erosion in a hole filling area is avoided, and the service life of the photovoltaic assembly packaging structure is prolonged. And the long-term stability of the perovskite solar module is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery field especially relates to a perovskite solar cell photovoltaic module packaging structure. BACKGROUND

[0002] In recent years, the global major economies continue to upgrade the "double carbon" target, and vigorously develop clean energy such as photovoltaic and wind power, which has become a necessary means for the global carbon neutralization. With the continuous decline of the degree of electricity cost, solar photovoltaic power generation has a trend of replacing traditional energy in some areas. How to reduce the degree of electricity cost will become the only way for photovoltaic modules to replace thermal power generation.

[0003] Solar photovoltaic modules have developed into the first generation of crystalline silicon solar cells, the second generation of semiconductor compound thin film cells and the third generation of perovskite solar cells in the past 50 years. The technical iteration of solar cells is one of the important ways to reduce the degree of electricity cost, but with the decline of manufacturing cost, the stability of the module has become one of the difficulties that must be solved for emerging technologies. Taking perovskite cells as an example, perovskite materials are extremely sensitive to water vapor, but the current packaging scheme used in industrialization cannot completely avoid the erosion of water vapor, which cannot meet the long-term stable use of perovskite modules outdoors.

[0004] The existing solution to the stability of photovoltaic module packaging scheme is generally to use edge butyl glue packaging, middle laying glue film and photovoltaic junction box pouring glue scheme, but the existing scheme cannot meet the stability requirements of modules with high stability requirements such as HJT, Topcon, perovskite and dye-sensitized solar cells. Taking perovskite thin film cells as an example, due to the water absorption characteristics of perovskite materials, when part of the water vapor penetrates through the butyl glue to reach the inside of the module, it will cause the decomposition of the perovskite absorption layer, ultimately affecting the performance and life of the solar cell; the water vapor transmission rate of butyl glue is 0.15-0.7g / m 2 / D, and the water vapor transmission rate of pouring glue can reach 100g / m 2 / D, due to the small contact area between the drainage strip of the module hole filling area and the butyl glue, water vapor penetration often occurs in the hole filling area of the perovskite module, therefore, effectively solving the influence of water vapor entering the module on the perovskite module will become an important solution to improve the humidity stability of perovskite. INVENTION CONTENTS

[0005] To solve the above problems, the utility model provides a kind of perovskite solar cell photovoltaic module packaging structure, it is processed into inside and outside two areas by photovoltaic junction box, outside area is used to extend water vapor erosion path, inside area is used to absorb the water vapor that penetrates through pouring glue area, avoid the problem of water vapor erosion in hole filling area in the effective period of module, greatly improve the long-term stability of perovskite solar module.

[0006] According to one aspect of the present application, a perovskite solar cell photovoltaic module packaging structure is provided, which comprises, from bottom to top, a conductive glass, a perovskite chip layer, a packaging adhesive film, a packaging glass and a photovoltaic junction box, the perovskite chip layer and the packaging adhesive film are packaged between the conductive glass and the packaging glass, the perovskite chip layer is packaged using a butyl rubber strip around it, the photovoltaic junction box is installed on the top of the packaging glass, the inside of the photovoltaic junction box has a spacing layer, the spacing layer separates the photovoltaic junction box into an outer region and an inner region, the outer region is filled with potting adhesive, and the inner region is provided with a superabsorbent resin.

[0007] In some embodiments, the outer region includes the area above and around each side of the inner region. It is beneficial to set the outer region to surround the inner region from above and around each side, which can play a role in isolating the inner region.

[0008] In some embodiments, the inner region is paved with a superabsorbent resin, and the inner region is filled after the superabsorbent resin and the potting adhesive are mixed and cured. It is beneficial to describe two schemes for setting a superabsorbent resin in the inner region, wherein the mixing order of various components in the superabsorbent resin and the potting adhesive can be arbitrarily set as needed.

[0009] In some embodiments, the superabsorbent resin is one or more of polyvinyl alcohol, polyethylene oxide, polyacrylate, starch-acrylonitrile graft polymer hydrolysate, starch-acrylic acid copolymer, starch-acrylamide graft polymer, cellulose graft copolymer, and cellulose derivative crosslinker. It is beneficial to describe the optional composition of the superabsorbent resin.

[0010] In some embodiments, the molecular weight of the superabsorbent resin is one or more of low molecular weight, medium molecular weight, and high molecular weight. It is beneficial to further describe the optional molecular weight of the superabsorbent resin.

[0011] In some embodiments, a plurality of drainage strips are provided in the inner region, and the bottom end of each drainage strip passes through the photovoltaic junction box and the packaging glass. It is beneficial that excess water vapor can be introduced and collected into the photovoltaic junction box for absorption through the drainage strips.

[0012] In some embodiments, the packaging glass is provided with an opening, and each of the drainage strips passes through the opening. It is beneficial that the opening can be sealed and filled by the drainage strips.

[0013] In some embodiments, the bottom end of each drainage strip is connected to the same butyl rubber block, and the butyl rubber block fills the opening. It is beneficial that the butyl rubber block can seal and fill the opening. Attached Figure Description

[0014] Figure 1 This is an exploded view of the encapsulation structure of a perovskite solar cell photovoltaic module according to one embodiment of the present invention.

[0015] Figure 2 for Figure 1 The diagram shows a side view of the photovoltaic junction box.

[0016] Figure 3 for Figure 1 The diagram shows a top view of the photovoltaic junction box.

[0017] In the diagram: 1. Conductive glass; 2. Perovskite chip layer; 3. Encapsulating film; 4. Encapsulating glass; 5. Photovoltaic junction box; 6. Butyl rubber strip; 7. Spacer layer; 8. Outer area; 9. Inner area; 11. Drain strip; 12. Opening; 13. Butyl rubber block. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] like Figure 1 As shown, the device includes, from bottom to top, conductive glass 1, perovskite chip layer 2, encapsulating film 3, encapsulating glass 4, and photovoltaic junction box 5. The perovskite chip layer 2 and the encapsulating film 3 are mounted on the conductive glass 1 and encapsulated between the conductive glass 1 and the encapsulating glass 4. The perovskite chip layer 2 is encapsulated with butyl rubber strip 6, and the photovoltaic junction box 5 is mounted on top of the encapsulating glass 4.

[0020] like Figures 2-3 As shown, the photovoltaic junction box 5 has an internal spacer layer 7 that divides the photovoltaic junction box 5 into two regions: an outer region 8 and an inner region 9. The outer region 8 includes the area above and around the inner region 9. The outer region 8 is filled with conventional potting compound, while the inner region 9 is filled with highly absorbent resin.

[0021] Therefore, after the photovoltaic junction box 5 is divided into two areas, outer zone 8 and inner zone 9, by the spacer layer 7, the potting compound of outer zone 8 can extend the path of water vapor erosion, while the inner zone 9 can use superabsorbent resin to absorb the water vapor that has penetrated through outer zone 8. That is, when water vapor reaches inner zone 9 after penetrating outer zone 8, it will be captured by superabsorbent resin. Superabsorbent resin has excellent water absorption and retention properties, and it can absorb up to tens of thousands of times its own weight in water vapor, thus preventing further water vapor erosion.

[0022] Preferably, the inner region 9 can be provided with only laid high water absorption resin, or can be provided with mixed curing of high water absorption resin and potting glue with multiple components, and the porous structure formed after the mixed curing of the high water absorption resin and the potting glue can increase the contact area of the polymer chain and the water vapor, improve the water vapor absorption rate, and inhibit the volume expansion after water absorption.

[0023] The mixing order of the various components in the high water absorption resin and the potting glue can be set at will according to needs. For example, the potting glue has component A and component B, and the A component, the B component and the high water absorption resin can be directly mixed, or the A component and the high water absorption resin can be mixed and then mixed with the B component, or the B component and the high water absorption resin can be mixed and then mixed with the A component.

[0024] Further preferably, the high water absorption resin is one or more of polyvinyl alcohol, polyoxyethylene, polyacrylate, starch-acrylonitrile graft polymer hydrolysate, starch-acrylic acid copolymer, starch-acrylamide graft polymer, cellulose graft copolymer, cellulose derivative crosslinking material, etc., and the molecular weight of the high water absorption resin is one or more of low molecular weight, medium molecular weight, and high molecular weight.

[0025] In addition, a plurality of drainage strips 11 are arranged in the inner region 9, the bottom end of each drainage strip 11 passes through the photovoltaic junction box 5 and the encapsulation glass 4 from the bottom, and the bottom end of each drainage strip 11 is connected to the same butyl rubber block 13. The encapsulation glass 4 is provided with an opening 12, each drainage strip 11 passes through the opening 12, and the butyl rubber block 13 can fill the opening 12.

[0026] When the photovoltaic module works, the temperature rises, and the butyl rubber block 13 on the glass has a water vapor transmission rate less than that of the potting glue. The excess water vapor is discharged from the inner region to the outer region of the junction box, introduced and collected into the photovoltaic junction box 5 through the drainage strip 11, and absorbed and released.

[0027] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the creative concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A perovskite solar cell photovoltaic module packaging structure, comprising, from bottom to top, a conductive glass (1), a perovskite chip layer (2), an encapsulation adhesive film (3), an encapsulation glass (4), and a photovoltaic junction box (5), the perovskite chip layer (2) and the encapsulation adhesive film (3) being encapsulated between the conductive glass (1) and the encapsulation glass (4), the perovskite chip layer (2) being encapsulated using a butyl adhesive strip (6) around the periphery, and the photovoltaic junction box (5) being mounted on top of the encapsulation glass (4), characterized in that: The inside of the photovoltaic junction box (5) has a spacing layer (7), which separates the photovoltaic junction box (5) into an outer area (8) and an inner area (9), the outer area (8) is filled with potting glue, and the inner area (9) is provided with super absorbent resin.

2. The perovskite solar cell photovoltaic module encapsulation structure according to claim 1, characterized in that: The outer area (8) includes the area above and around each side of the inner area (9).

3. The perovskite solar cell photovoltaic module encapsulation structure of claim 1, wherein: The inner area (9) is paved with super absorbent resin, or the inner area (9) is filled after mixed curing of super absorbent resin and potting glue.

4. The perovskite solar cell photovoltaic module encapsulant structure of claim 1, wherein: The inner area (9) is provided with drainage bars (11), and the bottom end of the drainage bars (11) penetrates through the photovoltaic junction box (5) and the packaging glass (4).

5. The perovskite solar cell photovoltaic module encapsulant structure of claim 4, wherein: The packaging glass (4) is provided with an opening (12), and each drainage bar (11) penetrates through the opening (12).

6. The perovskite solar cell photovoltaic module encapsulant structure of claim 5, wherein: The bottom end of each drainage bar (11) is connected with a butyl rubber block (13), and the butyl rubber block (13) fills the opening (12).

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