CN218677171U

CN218677171U - Photovoltaic module

Info

Publication number: CN218677171U
Application number: CN202222664530.9U
Authority: CN
Inventors: 张磊; 马建峰
Original assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc
Current assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-03-21
Anticipated expiration: 2032-10-10

Abstract

The utility model discloses a photovoltaic module, photovoltaic module includes: at least one battery string having a lead-out piece extending toward one side in a thickness direction thereof; the insulating plate is arranged on one side of the battery string in the thickness direction, and the leading-out sheet penetrates through the insulating plate; the battery string comprises an insulation board, a first cover plate and a lead-out piece, wherein the insulation board is arranged on one side of the insulation board, which faces away from the battery string, a groove is formed in one side of the insulation board, at least one part of the insulation board is located in the groove, a through hole is formed in the bottom of the groove, and the lead-out piece penetrates through the through hole. According to the utility model discloses photovoltaic module has whole frivolous, the difficult lobe of a leaf of battery and advantage such as blacken.

Description

Photovoltaic module

Technical Field

The utility model belongs to the technical field of the photovoltaic technique and specifically relates to a photovoltaic module is related to.

Background

The design of the photovoltaic module in the related art tends to be light and thin, so the thickness of the battery string for the photovoltaic module is smaller and smaller, the cover plate of the photovoltaic module is also required to be provided with an opening, so that the leading-out sheet of the battery string can extend out of the opening to supply power to a load, therefore, the photovoltaic module is required to be provided with an insulating block at the opening part for shielding, and because the insulating block has a certain thickness, a height drop exists in the area near the insulating block, and in the laminating process of the photovoltaic module, the battery sheet at the edge of the insulating block is easy to crack or blacken due to overlarge pressure.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a photovoltaic module, which has the advantages of being light and thin as a whole, preventing the cell from cracking and blackening.

In order to achieve the above object, according to the embodiment of the present invention, a photovoltaic module is provided, including: at least one battery string having a lead-out piece extending toward one side in a thickness direction thereof; the insulating plate is arranged on one side of the battery string in the thickness direction, and the leading-out sheet penetrates through the insulating plate; the battery string comprises an insulation board, a first cover plate and a lead-out piece, wherein the insulation board is arranged on one side of the insulation board, which faces away from the battery string, a groove is formed in one side of the insulation board, at least one part of the insulation board is located in the groove, a through hole is formed in the bottom of the groove, and the lead-out piece penetrates through the through hole.

According to the utility model discloses photovoltaic module has whole frivolous, the difficult lobe of a leaf of battery and advantage such as blacken.

According to some embodiments of the present invention, on being parallel to the plane of the first cover plate, the orthographic projection of the groove covers the orthographic projection of the insulation board, the orthographic projection of the insulation board covers the orthographic projection of the through-hole.

According to some embodiments of the present invention, the depth of the groove is 0.05mm to 0.3mm.

According to some embodiments of the present invention, the first cover plate has a thickness of 1.6mm to 2mm.

According to some embodiments of the invention, the groove and the insulating plate are rectangular with a shape adapted thereto; the length of the groove is less than 50mm, and/or the width of the groove is less than 50mm.

According to some embodiments of the invention, the cross-section of the through-hole is circular.

According to some embodiments of the present invention, the photovoltaic module further comprises: the first adhesive film layer is connected between the battery string and the first cover plate and used for fixing the relative position between the battery string and the first cover plate.

According to some embodiments of the present invention, the insulation board is provided between the first glue film layer and the first cover plate.

According to the utility model discloses a some embodiments, draw forth the piece and include: the positive electrode lead-out piece is connected with the positive electrode of the battery string and penetrates through the through hole; the negative electrode leading-out piece is connected with the negative electrode of the battery string and penetrates through the through hole; the insulating plate is provided with first through holes and second through holes which are arranged at intervals, the first through holes and the second through holes penetrate through the insulating plate along the thickness direction of the insulating plate, the positive electrode leading-out piece penetrates through the first through holes, and the negative electrode leading-out piece penetrates through the second through holes.

According to the utility model discloses a some embodiments, the battery cluster includes a plurality of battery pieces of arranging along its length direction interval, connects through the conductive band between two adjacent battery pieces, at least a part of conductive band is located the battery cluster with between the insulation board.

According to some embodiments of the present invention, the photovoltaic module further comprises: the second cover plate is positioned on one side, back to the first cover plate, of the battery string; and the second adhesive film layer is connected between the second cover plate and the battery string.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a photovoltaic module according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a photovoltaic module according to another embodiment of the present invention.

Fig. 4 is a cross-sectional view of a photovoltaic module according to another embodiment of the present invention.

Fig. 5 is a schematic structural diagram of the first cover plate of the photovoltaic module according to the embodiment of the present invention.

Fig. 6 is a schematic view of the first cover plate and the insulating plate of the photovoltaic module according to the embodiment of the present invention.

Fig. 7 is a schematic view of the first cover plate and the lead-out sheet of the photovoltaic module according to the embodiment of the present invention.

Fig. 8 is a schematic view of the combination of the insulating plate and the lead-out sheet of the photovoltaic module according to the embodiment of the present invention.

Reference numerals:

a photovoltaic module 1,

Battery string 100, tab 110, positive electrode tab 111, negative electrode tab 112, battery tab 120, conductive tape 130, and,

An insulation plate 200, a first through hole 210, a second through hole 220,

A first cover plate 300, a groove 310, a through hole 320,

A first adhesive film layer 400, a second cover plate 500, and a second adhesive film layer 600.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "a plurality" means two or more.

A photovoltaic module 1 according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1 to 8, a photovoltaic module 1 according to an embodiment of the present invention includes at least one battery string 100, an insulation plate 200, and a first cover plate 300.

The battery string 100 is provided with a lead-out piece 110 extending towards one side of the battery string 100 in the thickness direction, the insulating plate 200 is arranged at one side of the battery string 100 in the thickness direction, the lead-out piece 110 penetrates through the insulating plate 200, the first cover plate 300 is arranged at one side of the insulating plate 200, which is opposite to the battery string 100, a groove 310 is arranged at one side of the first cover plate 300, which faces towards the insulating plate 200, at least one part of the insulating plate 200 is positioned in the groove 310, a through hole 320 is arranged at the bottom of the groove 310, and the lead-out piece 110 penetrates through the through hole 320.

According to the utility model discloses photovoltaic module 1, through be equipped with the piece 110 of drawing forth that extends towards one side of its thickness direction at battery cluster 100, photovoltaic module 1 can be connected with external load through drawing forth piece 110, and be equipped with first apron 300 in thickness one side of battery cluster 100, first apron 300 can be for coated film toughened glass, light transmissivity and waterproof nature have been compromise to first apron 300 like this, when not influencing photovoltaic module 1's power generation performance, the holistic waterproof nature of photovoltaic module 1 has been guaranteed, the security is higher.

In addition, a through hole 320 is formed in the bottom of the groove 310 on the side of the first cover plate 300 facing the battery string 100, the lead-out tab 110 penetrates through the through hole 320, the insulation plate 200 is arranged between the first cover plate 300 and the battery string 100, at least a part of the insulation plate 200 is located in the groove 310, the through hole 320 can be sealed by arranging the insulation block 200, so that the probability that the battery string 100 is exposed from the through hole 320 is reduced, the electrical connection safety is improved, the insulation plate 200 extends into the groove 310, the thickness of the insulation plate 200 exceeding the first cover plate 300 can be reduced, the pressure of the insulation plate 200 on the battery string 100 is reduced, the probability that the battery piece 120 in the battery string 100 is cracked or blackened is reduced, the appearance is attractive, the power generation efficiency is high, the overall thickness of the insulation plate 200 and the first cover plate 300 can be reduced, and the light and thin arrangement of the photovoltaic module 1 is facilitated.

Therefore, according to the utility model discloses photovoltaic module 1 has whole frivolous, the difficult lobe of a leaf and advantage such as blacken of battery piece 120.

According to some embodiments of the present invention, as shown in fig. 2, 4, 6 and 7, on a plane parallel to the first cover plate 300, the orthographic projection of the groove 310 covers the orthographic projection of the insulation plate 200, and the orthographic projection of the insulation plate 200 covers the orthographic projection of the through hole 320.

For example, the minimum cross-sectional area of the groove 310 may be greater than the maximum cross-sectional area of the insulating plate 200, the minimum cross-sectional area of the insulating plate 200 may be greater than the maximum cross-sectional area of the through hole 320, and the groove 310 may effectively accommodate the insulating plate 200, thereby reducing the pressure of the insulating plate 200 on the battery string 100, reducing the risk of the battery piece 120 of the battery string 100 breaking and blackening, and the insulating plate 200 may form a more effective seal on the through hole 320, preventing the battery string 100 from being exposed out of the through hole 320, improving the electrical connection safety, and reducing the probability of damage to the battery piece 120 of the battery string 100.

According to some embodiments of the present invention, the depth of the groove 310 is 0.05mm to 0.3mm. Like this, the degree of depth of recess 310 is not less than 0.05mm, after insulation board 200 stretched into recess 310, can reduce the thickness that insulation board 200 surpassed first apron 300 effectively, thereby reduce the pressure of insulation board 200 to battery cluster 100 effectively, and then avoid the battery piece 120 local pressure in the battery cluster 100 too big and take place the lobe of a leaf and blacken, and the degree of depth of recess 310 is not more than 0.3mm, be favorable to guaranteeing the structural strength of first apron 300, can reduce the damage probability of first apron 300.

According to some embodiments of the present invention, the thickness of the first cover plate 300 is 1.6mm to 2mm. Like this, the thickness of first apron 300 is not less than 1.6mm, can guarantee to set up recess 310 on first apron 300 after, the structural strength of first apron 300 is enough, prevents that first apron 300 from appearing damaging (for example the crackle appears etc.), and the thickness of first apron 300 is not more than 2mm to prevent that photovoltaic module 1's thickness is too big, is favorable to photovoltaic module 1's frivolous design.

According to some embodiments of the present invention, as shown in fig. 5 to 8, the groove 310 and the insulating plate 200 are rectangles with a shape adapted thereto, the length of the groove 310 is less than 50mm, and the width of the groove 310 is less than 50mm. Therefore, on one hand, the cross-sectional area of the groove 310 is enough to accommodate the insulating plate 200, the shape between the groove 310 and the insulating plate 200 is more fit, and on the other hand, the cross-sectional area of the groove 310 is not too large, so that the structural strength of the first cover plate 300 can be ensured, and the damage probability of the first cover plate 300 can be reduced.

According to some embodiments of the present invention, as shown in fig. 5-7, the cross-section of the through-hole 320 is circular. Thus, the inner peripheral surface of the through hole 320 is uniformly stressed, and is not easily damaged by stress concentration.

According to some embodiments of the present invention, as shown in fig. 1-2, the battery string 100 includes a plurality of battery pieces 120 arranged at intervals along a length direction thereof, two adjacent battery pieces 120 are connected by a conductive tape 130, and at least a portion of the conductive tape 130 is located between the battery string 100 and the insulating plate 200.

The Cell 120 may be a Heterojunction Cell (HJT) with internal Thin Layer, a Passivated Emitter and back Cell (PERC), or a Tunnel Oxide passivation Cell (TOPCon). And, one end of the conductive tape 130 is connected to the front surface of one of the adjacent two battery cells 120, and the other end of the conductive tape 130 is connected to the rear surface of the other of the adjacent two battery cells 120, so that the plurality of battery cells 120 in the battery string 100 are connected in series with each other.

In addition, the photovoltaic module 1 may include a plurality of cell strings 100, the cell strings 100 are arranged at intervals along the width direction of the cell string 100, the cell strings 100 may be connected to one lead-out sheet 110, or the cell strings 100 may be connected to the lead-out sheets 110 in a one-to-one correspondence, or the cell strings 100 may be connected to the lead-out sheets 110 in a many-to-one correspondence.

According to some embodiments of the present invention, as shown in fig. 1 to 4, the photovoltaic module 1 further includes a first adhesive film layer 400, and the first adhesive film layer 400 is connected between the battery string 100 and the first cover plate 300, for fixing the relative position between the battery string 100 and the first cover plate 300. By providing the first adhesive film layer 400, connection and positioning between the battery string 100 and the first cap plate 300 can be achieved.

The first adhesive film layer 400 may be a high-transparency adhesive film, for example, the first adhesive film layer 400 may be made of at least one of Ethylene Vinyl Acetate Copolymer (EVA), polyethylene octene co-elastomer (POE), and Polyvinyl Butyral Resin (PVB).

According to some embodiments of the present invention, as shown in fig. 1-2, the insulation board 200 is disposed between the first adhesive film layer 400 and the first cover plate 300. Thus, before the photovoltaic module 1 is laminated, the first adhesive film layer 400 is in a high-temperature melting state, at this time, the first adhesive film layer 400 can fill the edge of the conductive strip 130 between the insulating plate 200 and the cell 120, make up for the height difference between the conductive strip 130 and the cell 120, and can utilize the elasticity of the first adhesive film layer 400, so that the pressure of the insulating plate 200 on the cell 120 is reduced, the occurrence of cell 120 cracking is reduced, and the cell 120 is not prone to blacking due to excessive local stress.

According to some embodiments of the present invention, as shown in fig. 7-8, tab 110 includes a positive tab 111 and a negative tab 112.

The positive electrode tab 111 is connected to the positive electrode of the battery string 100 and passes through the through hole 320, and the negative electrode tab 112 is connected to the negative electrode of the battery string 100 and passes through the through hole 320. The insulating plate 200 is provided with first through holes 210 and second through holes 220 arranged at intervals, the first through holes 210 and the second through holes 220 penetrate through the insulating plate 200 along the thickness direction of the insulating plate 200, the positive electrode lead-out piece 111 penetrates through the first through holes 210, and the negative electrode lead-out piece 112 penetrates through the second through holes 220.

In this way, the cell string 100 can form a complete path with an external load through the positive electrode tab 111 and the negative electrode tab 112, so that the photovoltaic module 1 supplies power to the external load, and the insulating plate 200 can realize the isolation between the root of the positive electrode tab 111 (i.e., the end of the positive electrode tab 111 close to the cell string 100) and the root of the negative electrode tab 112 (i.e., the end of the negative electrode tab 112 close to the cell string 100), so that the short circuit between the positive electrode tab 111 and the negative electrode tab 112 can be avoided.

According to some embodiments of the present invention, as shown in fig. 1-4, the photovoltaic module 1 further includes a second cover plate 500 and a second adhesive film layer 600, the second cover plate 500 is located on one side of the battery string 100 facing away from the first cover plate 300, and the second adhesive film layer 600 is connected between the second cover plate 500 and the battery string 100.

For example, the second adhesive film layer 600 may be made of at least one of Ethylene Vinyl Acetate Copolymer (EVA), polyethylene octene co-elastomer (POE), and Polyvinyl Butyral Resin (PVB).

Through setting up second glued membrane layer 600, can realize connecting and the location between battery cluster 100 and the second apron 500 to because second apron 500 can be tempering knurling glass or float glass, photovoltaic module 1's waterproof performance is better. In addition, the second adhesive film layer 600 may be an ultraviolet cut-off adhesive film or a white adhesive film, and the second cover plate 500 and the second adhesive film layer 600 are disposed on a surface of the battery string 100 facing away from the sun, so that the second adhesive film layer 600 can reflect sunlight to the battery string 100 as much as possible, thereby improving the power generation efficiency of the photovoltaic module 1.

Other constructions and operations of the photovoltaic module 1 according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, comprising:

at least one battery string having a lead-out piece extending toward one side in a thickness direction thereof;

the insulating plate is arranged on one side of the battery string in the thickness direction, and the leading-out sheet penetrates through the insulating plate;

the battery string comprises an insulation board, a first cover plate and a lead-out piece, wherein the insulation board is arranged on one side of the insulation board, which faces away from the battery string, a groove is formed in one side of the insulation board, at least one part of the insulation board is located in the groove, a through hole is formed in the bottom of the groove, and the lead-out piece penetrates through the through hole.

2. The photovoltaic module according to claim 1, wherein an orthographic projection of the groove covers an orthographic projection of the insulating plate, and an orthographic projection of the insulating plate covers an orthographic projection of the through hole, on a plane parallel to the first cover plate.

3. The photovoltaic module of claim 1, wherein the grooves have a depth of 0.05mm to 0.3mm.

4. The photovoltaic module of claim 3, wherein the first cover plate has a thickness of 1.6mm to 2mm.

5. The photovoltaic module of claim 1, wherein the recess and the insulating plate are form-fitting rectangles;

the length of the groove is less than 50mm, and/or the width of the groove is less than 50mm.

6. The photovoltaic module of claim 1, wherein the through-hole is circular in cross-section.

7. The photovoltaic module of claim 1, further comprising:

the first adhesive film layer is connected between the battery string and the first cover plate and used for fixing the relative position between the battery string and the first cover plate.

8. The photovoltaic module of claim 7, wherein the insulating plate is disposed between the first adhesive film layer and the first cover plate.

9. The photovoltaic module of any of claims 1-8, wherein the tab comprises:

the positive electrode lead-out piece is connected with the positive electrode of the battery string and penetrates through the through hole;

the negative electrode leading-out piece is connected with the negative electrode of the battery string and penetrates through the through hole;

the insulating plate is provided with first through holes and second through holes which are arranged at intervals, the first through holes and the second through holes penetrate through the insulating plate along the thickness direction of the insulating plate, the positive electrode leading-out piece penetrates through the first through holes, and the negative electrode leading-out piece penetrates through the second through holes.

10. The assembly defined in any one of claims 1 to 8, wherein the string comprises a plurality of cells spaced along the length of the string, and two adjacent cells are connected by a conductive tape, at least a portion of the conductive tape being located between the string and the insulating sheet.

11. The photovoltaic module of any of claims 1-8, further comprising:

the second cover plate is positioned on one side, back to the first cover plate, of the battery string;

and the second adhesive film layer is connected between the second cover plate and the battery string.