Laminated part, photovoltaic module and preparation method of laminated part

Abstract

The invention relates to the technical field of photovoltaics, and discloses a laminated part, a photovoltaic module and a preparation method of the laminated part. The laminated piece comprises first glass, second glass, a battery piece, a flexible protection piece and a packaging adhesive film, and the battery piece is located between the first glass and the second glass; the flexible protection piece is located on the peripheral sides of the first glass and the second glass, and one end of the flexible protection piece extends into the space between the first glass and the second glass; the packaging adhesive film is positioned between the first glass and the second glass, is also positioned between the first glass and the flexible protection piece, and is also positioned between the second glass and the flexible protection piece. As the flexible protection pieces are arranged on the peripheral sides of the first glass and the second glass, the thicknesses of the packaging adhesive films located at the first glass and the second glass are reduced, the thicknesses of the peripheral sides of the first glass and the second glass are basically consistent, and the uniformity of the thicknesses of the periphery of the double-glass laminated piece is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic, in particular to a laminated piece, a photovoltaic module and a preparation method of the laminated piece. BACKGROUND

[0002] The laminated piece generally comprises a front glass, a back glass and a cell sheet encapsulated between the front glass and the back glass.

[0003] In the preparation of the laminated piece, the encapsulation adhesive film is first laid on the front glass, the cell sheet is placed on the encapsulation adhesive film, the encapsulation adhesive film is continuously laid on the cell sheet, the back glass is placed on the encapsulation adhesive film, and then the front glass and the back glass are fixed and laminated by the laminating frame to form the laminated piece.

[0004] The front glass and the back glass are provided with relatively thick encapsulation adhesive film on the circumferential side. However, when the double-glass laminated piece is laminated by the existing laminating method, the relatively thick encapsulation adhesive film makes the thickness of the double-glass laminated piece around be not uniform. SUMMARY

[0005] Therefore, the present application provides a laminated piece, a photovoltaic module and a preparation method of the laminated piece, which can reduce the occurrence of the thickness of the double-glass laminated piece around being not uniform.

[0006] To this end, in a first aspect, the present application provides a laminated piece, comprising: a first glass; a second glass; a cell sheet located between the first glass and the second glass; a flexible protective piece located on the circumferential side of the first glass and the second glass, and one end of the flexible protective piece extends into the first glass and the second glass; an encapsulation adhesive film located between the first glass and the second glass, the encapsulation adhesive film is also located between the first glass and the flexible protective piece, and the encapsulation adhesive film is also located between the second glass and the flexible protective piece.

[0007] In one of the embodiments, the one end of the flexible protective piece extending into the first glass and the second glass is a first end, a first tooth portion is arranged on the side of the first end facing the first glass, and / or a second tooth portion is arranged on the side of the first end facing the second glass.

[0008] In one of the embodiments, the one end of the flexible protective piece extending into the first glass and the second glass is a second end, the second end is provided with a first plane and a second plane along the thickness direction, the first plane is arranged flush with the plane of the first glass away from the second glass, and the second plane is arranged flush with the plane of the second glass away from the first glass.

[0009] In one of the embodiments, the material of the flexible protective member comprises at least one of glass fiber composite material, polytetrafluoroethylene, fluoro rubber and polyphenylene sulfide.

[0010] In a second aspect, the embodiments of the present application provide a photovoltaic module, comprising the laminate as claimed in any one of the above embodiments, the laminate comprising a flexible protective member, a first glass and a second glass, a first connecting gap being formed between the second end of the flexible protective member and the first glass, and a second connecting gap being formed between the second end of the flexible protective member and the second glass.

[0011] In one of the embodiments, the photovoltaic module comprises a frame, the frame comprising a mounting cavity for mounting the laminate, and the first connecting gap and the second connecting gap are both connected to the inner wall of the mounting cavity.

[0012] In one of the embodiments, the mounting cavity is further filled with sealant, and the sealant wraps the second end.

[0013] In one of the embodiments, the photovoltaic module comprises a pressing block, the pressing block being provided with a clamping cavity for mounting the laminate, and the first connecting gap and the second connecting gap are both connected to the inner wall of the clamping cavity.

[0014] In one of the embodiments, a plurality of the pressing blocks are provided, and the plurality of the pressing blocks are arranged at intervals along the circumferential side of the laminate.

[0015] In one of the embodiments, a preparation method of the laminate is used for preparing the laminate as claimed in any one of the above embodiments, the preparation method comprising: laying a first layer of encapsulating adhesive film on one side of the first glass; placing the cell sheet at the first layer of encapsulating adhesive film and placing the flexible protective member on the circumferential side of the first glass, the first end of the flexible protective member being located at the first layer of encapsulating adhesive film; laying a second layer of encapsulating adhesive film on the cell sheet and the first end; placing the second glass at the second layer of encapsulating adhesive film to form a semi-finished product; and then placing the semi-finished product into a laminator for lamination.

[0016] According to the laminated piece, the photovoltaic module and the preparation method of the laminated piece provided by the embodiment of the present application, the laminated piece comprises a first glass, a second glass, a cell piece, a flexible protection piece and an encapsulating film, the cell piece is located between the first glass and the second glass; the flexible protection piece is located at the circumferential side of the first glass and the second glass, and one end of the flexible protection piece extends into the space between the first glass and the second glass; the encapsulating film is located between the first glass and the second glass, and the encapsulating film is also located between the first glass and the flexible protection piece and between the second glass and the flexible protection piece. Since the flexible protection piece is arranged at the circumferential side of the first glass and the second glass, the thickness of the encapsulating film located at the first glass and the second glass is reduced, the thickness of the circumferential side of the first glass and the second glass is substantially uniform, and the uniformity of the thickness of the circumferential side of the double-glass laminated piece is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structure schematic diagram of a laminated piece provided by the embodiment of the present application is shown;

[0018] Figure 2 A structure schematic diagram of a flexible protection piece provided by the embodiment of the present application is shown;

[0019] Figure 3 A partial schematic diagram of a laminated piece and a frame provided by the embodiment of the present application is shown;

[0020] Figure 4 A structure schematic diagram of a laminated piece and a frame provided by the embodiment of the present application is shown;

[0021] Figure 5 A partial schematic diagram of a laminated piece and a pressing block provided by the embodiment of the present application is shown;

[0022] Figure 6 A structure schematic diagram of a laminated piece and a pressing block provided by the embodiment of the present application is shown.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, first glass; 11, first connecting gap; 2, second glass; 21, second connecting gap; 3, cell piece; 4, flexible protection piece; 41, first end; 411, first tooth part; 412, second tooth part; 42, second end; 421, first plane; 422, second plane; 5, encapsulating film; 6, frame; 61, mounting cavity; 62, sealing glue; 7, pressing block; 71, clamping cavity. DETAILED DESCRIPTION

[0025] The circumferential side of the front glass and the back glass is provided with relatively thick encapsulating film, however, when the double-glass laminated piece is laminated by the existing laminating method, the relatively thick encapsulating film makes the thickness of the circumferential side of the double-glass laminated piece not uniform.

[0026] To solve the above problems, with reference to Figure 1 , Figure 1 A structure schematic diagram of a laminated piece provided by an embodiment of the present application is shown. The present application provides a laminated piece, which comprises a first glass 1, a second glass 2, a battery piece 3, a flexible protective piece 4, and an encapsulation adhesive film 5. The battery piece 3 is located between the first glass 1 and the second glass 2. The flexible protective piece 4 is located at the peripheral side of the first glass 1 and the second glass 2, and one end of the flexible protective piece 4 extends into the space between the first glass 1 and the second glass 2. The encapsulation adhesive film 5 is located between the first glass 1 and the second glass 2, and also located between the first glass 1 and the flexible protective piece 4, and also located between the second glass 2 and the flexible protective piece 4.

[0027] It should be understood that the laminated piece comprises the first glass 1 and the second glass 2, either of which is a front glass, and the other is a back glass. In one example, the first glass 1 is a front glass, and the second glass is a back glass. The first glass 1 and the second glass 2 are stacked and spaced apart. The battery piece 3 is provided in plurality, and the plurality of battery pieces 3 are connected in series to form a battery string, and are located between the first glass 1 and the second glass 2. The flexible protective piece 4 is in a flexible state when laminating the laminated piece. The flexible protective piece 4 is arranged at the peripheral side of the first glass 1 and the second glass 2, and one end of the flexible protective piece 4 is located between the first glass 1 and the second glass 2. The flexible protective piece 4 is arranged in a ring shape, and the specific shape is arranged according to the first glass 1 and the second glass 2. In one example, the flexible protective piece 4 is in a square ring shape.

[0028] The laminated piece further comprises the encapsulation adhesive film 5, which is located between the first glass 1 and the second glass 2 to fix the battery piece 3 and the first glass 1 and the second glass 2. The encapsulation adhesive film 5 is also located between the flexible protective piece 4 and the first glass 1 to connect the flexible protective piece 4 and the first glass 1. The encapsulation adhesive film 5 is also located between the second glass 2 and the flexible protective piece 4 to connect the flexible protective piece 4 and the second glass 2.

[0029] Since the flexible protective piece 4 is arranged at the peripheral side of the first glass 1 and the second glass 2, the thickness of the encapsulation adhesive film 5 located at the first glass 1 and the second glass 2 is reduced, so that the thickness of the peripheral side of the first glass 1 and the second glass 2 is basically consistent, and the uniformity of the thickness of the four sides of the double-glass laminated piece is improved.

[0030] In some optional embodiments, the end of the flexible protective piece 4 extending into the space between the first glass 1 and the second glass 2 is a first end 41, and a first tooth portion 411 is arranged on the side of the first end 41 facing the first glass 1. The arrangement of the first tooth portion 411 can increase the contact area of the flexible protective piece 4 and the encapsulation adhesive film 5, and improve the stability of the connection between the flexible protective piece 4 and the first glass 1.

[0031] With reference toFigure 2 , Figure 2 A structure diagram of a flexible protective piece is shown. In some optional embodiments, the first end 41 is provided with a second tooth portion 412 facing one side of the second glass 2. The second tooth portion 412 can increase the contact area of the flexible protective piece 4 with the encapsulation adhesive film 5, and improve the stability of the connection between the flexible protective piece 4 and the second glass 2.

[0032] Referring to Figure 1 and Figure 2 In some optional embodiments, the end of the flexible protective piece 4 extending between the first glass 1 and the second glass 2 is a second end 42, the second end 42 is provided with a first plane 421 and a second plane 422 along the thickness direction, the first plane 421 is arranged flush with the plane of the first glass 1 away from the second glass 2, and the second plane 422 is arranged flush with the plane of the second glass 2 away from the first glass 1. The second end 42 is connected to the edges of the first glass 1 and the second glass 2 through the encapsulation adhesive film 5, and the second end 42 can protect the edges of the first glass 1 and the second glass 2, avoid other foreign matters directly touching the edges of the first glass 1 and the second glass 2, and reduce the probability of damage to the first glass 1 and the second glass 2.

[0033] The first plane 421 of the second end 42 is arranged flush with the plane of the first glass 1 away from the second glass 2, to avoid height difference between the second end 42 and the first glass 1, avoid accumulation of impurities such as dust or rainwater, and avoid occurrence of hot spots on the first glass 1. The second plane 422 of the second end 42 is arranged flush with the plane of the second glass 2 away from the first glass 1, to avoid height difference between the second end 42 and the second glass 2, avoid accumulation of impurities such as dust or rainwater, and avoid occurrence of hot spots on the second glass 2.

[0034] In some optional embodiments, the material of the flexible protective piece 4 includes at least one of glass fiber composite material, polytetrafluoroethylene, fluororubber, and polyphenylene sulfide. The glass fiber composite material has the effects of light weight, high strength, corrosion resistance, insulation, and flexible molding. The polytetrafluoroethylene (PTFE) has the effects of ultra-wide temperature, low friction, chemical corrosion resistance, and non-stickiness. The fluororubber has the effects of oil resistance, high temperature resistance, chemical medium resistance, and high sealing performance. The polyphenylene sulfide (PPS) has the effects of high temperature resistance, flame retardation, chemical corrosion resistance, and high frequency electrical insulation.

[0035] Referring to Figures 3-6 , Figure 3 A local diagram of a laminated piece and a frame is shown, Figure 4 A structure diagram of a laminated piece and a frame is shown, Figure 5 A local diagram of a laminated piece and a pressing block is shown, Figure 6A structure schematic diagram of a laminated component and a pressing block is shown.

[0036] The application also includes a photovoltaic module comprising the laminated component according to any one of the above, the laminated component comprising the flexible protective member 4, the first glass 1 and the second glass 2, the second end 42 of the flexible protective member 4 is connected to the first glass 1 at the first connecting gap 11, and the second end 42 of the flexible protective member 4 is connected to the second glass 2 at the second connecting gap 21. The photovoltaic module can comprise the frame 6 or the pressing block 7, which is not limited in the application.

[0037] Since the first glass 1 and the second glass 2 are provided with the flexible protective member 4 on the circumferential side, the thickness of the encapsulation adhesive film 5 located at the first glass 1 and the second glass 2 is reduced, so that the thickness of the circumferential side of the first glass 1 and the second glass 2 is substantially uniform, and the uniformity of the thickness of the circumferential side of the double-glass laminated component is improved.

[0038] Referring to Figure 3 and Figure 4 In some optional embodiments, the photovoltaic module comprises the frame 6, the frame 6 comprises a mounting cavity 61 for mounting the laminated component, and the first connecting gap 11 and the second connecting gap 21 are both connected to the inner wall of the mounting cavity 61. The frame 6 is connected to the laminated component, and when connected, the first connecting gap 11 and the second connecting gap 21 are both located on the inner wall of the mounting cavity 61, so that the first connecting gap 11 and the second connecting gap 21 can be protected, and the probability of the second end 42 of the flexible protective member 4 being separated from the first glass 1 and the second glass 2 is reduced. The frame 6 can be located at the two long edges of the laminated component, or the frame 6 can be located at the short edges of the laminated component, which is not limited in the application. Since the frame 6 has a spacing between the frames 6, and the frame 6 has a certain inclination angle when mounted, water and dust will be excluded from the spacing, thereby reducing the occurrence of component hot spots and reliability problems caused by dust and water accumulation on the circumferential side of the laminated component.

[0039] In some optional embodiments, the mounting cavity 61 is also filled with a sealant 62, and the sealant 62 wraps the second end 42. The arrangement of the sealant 62 can improve the stability of the connection between the flexible protective member 4, the first glass 1, the second glass 2 and the frame 6.

[0040] Referring to Figure 5 and Figure 6 In some optional embodiments, the photovoltaic module comprises the pressing block 7, the pressing block 7 is provided with a clamping cavity 71 for mounting the laminated component, and the first connecting gap 11 and the second connecting gap 21 are both connected to the inner wall of the clamping cavity 71. The pressing block 7 is connected to the laminated component, and when connected, the first connecting gap 11 and the second connecting gap 21 are both located on the inner wall of the clamping cavity 71, so that the first connecting gap 11 and the second connecting gap 21 can be protected, and the probability of the second end 42 of the flexible protective member 4 being separated from the first glass 1 and the second glass 2 is reduced.

[0041] And, in the setting of the frame 6, the block 7 can be used to save the frame step, greatly reducing the overall preparation cost of the photovoltaic module, and the length of the block 7 is shorter, that is, the block 7 will not occupy too much of the peripheral side of the laminated piece, so that the peripheral side of the laminated piece has no additional connecting piece, and rainwater or dust can be discharged without obstruction, further reducing the occurrence of component hot spots and reliability problems caused by the accumulation of dust and water on the peripheral side of the laminated piece.

[0042] In some optional embodiments, the block 7 is provided in a plurality, and the plurality of blocks 7 are arranged at intervals along the peripheral side of the laminated piece. The arrangement of the plurality of blocks 7 can enhance the overall strength of the module and improve the installation effect of the laminated piece and other components in the external environment.

[0043] Referring to Figures 1-6 The present application also includes a preparation method of the laminated piece, for preparing any one of the above laminated pieces, the preparation method comprising:

[0044] Laying the first layer of encapsulation adhesive film 5 on one side of the first glass 1;

[0045] Placing the battery piece 3 at the first layer of encapsulation adhesive film 5, and placing the flexible protective piece 4 on the peripheral side of the first glass 1, with the first end of the flexible protective piece 4 located at the first layer of encapsulation adhesive film 5;

[0046] Laying the second layer of encapsulation adhesive film 5 on both the battery piece 3 and the first end 41;

[0047] Placing the second glass 2 at the second layer of encapsulation adhesive film 5 to form a semi-finished product;

[0048] Then placing the semi-finished product into a laminator for lamination.

[0049] Since the flexible protective piece 4 is arranged between the first glass 1 and the second glass 2, when the semi-finished product is laminated in the laminator, a laminating frame is not required, reducing the lamination step.

[0050] The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

Claims

1. A laminate, characterized in that, include: First glass (1); Second glass (2); The battery cell (3) is located between the first glass (1) and the second glass (2); A flexible protective element (4) is located on the periphery of the first glass (1) and the second glass (2), and one end of the flexible protective element (4) extends between the first glass (1) and the second glass (2); The encapsulating film (5) is located between the first glass (1) and the second glass (2). The encapsulating film (5) is also located between the first glass (1) and the flexible protective member (4). The encapsulating film (5) is also located between the second glass (2) and the flexible protective member (4).

2. The laminate according to claim 1, characterized in that, The flexible protective member (4) has a first end (41) extending between the first glass (1) and the second glass (2). The first end (41) has a first tooth (411) on the side facing the first glass (1), and / or, the first end (41) has a second tooth (412) on the side facing the second glass (2).

3. The laminate according to claim 1, characterized in that, The flexible protective member (4) extends out of the space between the first glass (1) and the second glass (2) as the second end (42). The second end (42) is provided with a first plane (421) and a second plane (422) along the thickness direction. The first plane (421) is flush with the plane of the first glass (1) away from the second glass (2), and the second plane (422) is flush with the plane of the second glass (2) away from the first glass (1).

4. The laminate according to claim 1, characterized in that, The flexible protective component (4) is made of at least one of glass fiber composite material, polytetrafluoroethylene, fluororubber and polyphenylene sulfide.

5. A photovoltaic module, characterized in that, The laminate includes the laminate as described in any one of claims 1-4, wherein the connection between the second end (42) of the flexible protective member (4) and the first glass (1) is a first connection gap (11), and the connection between the second end (42) of the flexible protective member (4) and the second glass (2) is a second connection gap (21).

6. The photovoltaic module according to claim 5, characterized in that, The photovoltaic module includes a frame (6), the frame (6) includes a mounting cavity (61) for mounting the laminate, and the first connecting gap (11) and the second connecting gap (21) are both connected to the inner wall of the mounting cavity (61).

7. The photovoltaic module according to claim 6, characterized in that, The mounting cavity (61) is also filled with sealant (62), which wraps around the second end (42).

8. The photovoltaic module according to claim 5, characterized in that, The photovoltaic module includes a pressure block (7), which is provided with a clamping cavity (71) for installing the laminate. The first connecting gap (11) and the second connecting gap (21) are both connected to the inner wall of the clamping cavity (71).

9. The photovoltaic module according to claim 8, characterized in that, Multiple pressure blocks (7) are provided, and the multiple pressure blocks (7) are arranged at intervals along the periphery of the laminate.

10. A method for preparing a laminate, characterized in that, The method for preparing the laminate as described in any one of claims 1-4 comprises: A first layer of encapsulating film (5) is laid on one side of the first glass (1); The battery cell (3) is placed on the first layer of encapsulating film (5), and the flexible protective member (4) is placed on the periphery of the first glass (1). The first end (41) of the flexible protective member (4) is located on the first layer of encapsulating film (5). A second layer of encapsulating film (5) is laid on both the battery cell (3) and the first end (41); The second glass (2) is placed on the second layer of encapsulating film (5) to form a semi-finished product; The semi-finished product is then placed into a laminator for lamination.

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