CN218215323U - Photovoltaic cover plate, photovoltaic module and photovoltaic system - Google Patents

Abstract

The utility model is suitable for a photovoltaic technology field provides a photovoltaic apron, photovoltaic module and photovoltaic system, and the photovoltaic apron is formed with a plurality of mounting grooves on the surface, and the mounting groove includes first recess and at least one second recess, and the first recess of second recess intercommunication, solar wafer install in the first recess, solar wafer forms a packing space with the bottom of first recess, and second recess intercommunication packing space, so, when encapsulating solar wafer, only need place solar wafer in first recess, lay one deck glued membrane and another apron on the photovoltaic apron, the glued membrane can flow into to packing space from the second recess and make solar wafer's one side and photovoltaic apron bond after the melting, the another side then bonds with another apron, and need not to set up the bonding of two-layer glued membrane realization solar wafer two-sides, has reduced photovoltaic module's manufacturing step and cost, has improved production efficiency.

Description

Photovoltaic cover plate, photovoltaic module and photovoltaic system

Technical Field

The utility model relates to a photovoltaic technology field especially relates to a photovoltaic apron, photovoltaic module and photovoltaic system.

Background

With the vigorous development of the photovoltaic industry, the current research direction for realizing cost reduction and efficiency improvement of the photovoltaic module industry becomes. In the correlation technique, in order to well realize the inside encapsulation effect of photovoltaic module, materials such as 2 layers of apron, 2 layers of glued membranes, solar cell square matrix, frame need usually be used to photovoltaic module in manufacturing process. The function of the adhesive film is mainly to realize that the battery matrix is adhered with the front or back glass/back plate. When two layers of adhesive films are laid, a good adhesion effect can be achieved, but manufacturing steps are increased, and production efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a photovoltaic apron, photovoltaic module and photovoltaic system aims at solving photovoltaic module's among the prior art manufacturing step more, the lower and higher technical problem of cost of production efficiency.

The utility model discloses a realize like this, the embodiment of the utility model provides a photovoltaic apron is used for photovoltaic module, photovoltaic apron form a plurality of mounting grooves on the surface, and is a plurality of the mounting groove array is arranged, the mounting groove includes first recess and at least one second recess, the second recess intercommunication first recess, first recess is used for installing solar wafer installs when in the first recess, solar wafer with the bottom of first recess forms a packing space, second recess intercommunication the packing space.

Furthermore, the side wall surface of the first groove intersected with the second groove is an inclined surface.

Further, the side wall surface where the first groove and the second groove intersect is inclined from the bottom surface of the first groove to the outer side of the bottom surface of the first groove.

Furthermore, the first groove comprises a filling groove and a step groove positioned at the top of the filling groove, the step groove is used for bearing the solar cell, the second groove is communicated with the filling groove, when the solar cell is placed on the step groove, the solar cell covers the filling groove to form the filling space, and the depth of the bottom surface of the step groove is smaller than that of the second groove.

Furthermore, the side wall surface of the filling groove intersected with the second groove is an inclined surface and inclines from the bottom surface of the filling groove to the outer side of the bottom surface of the filling groove.

Furthermore, the bottom surface of the second groove is an inclined surface and inclines to one side where the first groove is located; and/or

The side wall surface of the second groove is an inclined surface.

Furthermore, the number of the second grooves is multiple, and the second grooves are located on different sides of the first groove.

Furthermore, the photovoltaic cover plate is provided with a plurality of mounting grooves at intervals along a first direction and a second direction, and the first direction is crossed with the second direction;

the second grooves of two adjacent mounting grooves in the first direction are communicated with each other; and/or

The second grooves of two adjacent mounting grooves in the second direction are communicated with each other.

Still further, the depth of each of the first and second grooves is less than or equal to half the thickness of the photovoltaic cover plate.

The utility model also provides a photovoltaic module, photovoltaic module includes:

a first cover plate, the first cover plate being any one of the photovoltaic cover plates described above;

the solar cell pieces are arranged in the first grooves, at least one solar cell piece is arranged in each first groove, and a filling space is formed between each solar cell piece and the bottom of each first groove;

the adhesive film layer covers the solar cell piece;

the colloid is filled in the filling space, and the colloid flows into the filling space from the second groove after the colloid layer is melted to form the adhesive tape; and

and the second cover plate is covered on the adhesive film layer.

The utility model also provides a photovoltaic system, photovoltaic system includes foretell photovoltaic module.

The utility model discloses the beneficial effect who reaches is: the photovoltaic cover plate is characterized in that a plurality of mounting grooves are formed in the surface of the photovoltaic cover plate, each mounting groove comprises a first groove and a second groove communicated with the first grooves, the first grooves are used for mounting solar cells, when the solar cells are mounted in the first grooves, the solar cells and the bottoms of the first grooves form a filling space, and the second grooves are communicated with the filling space. So, when encapsulating the solar wafer, only need place the solar wafer in first recess, lay one deck glued membrane and another apron on the photovoltaic apron, then make the glued membrane melting can make the glued membrane can flow into to the filling space from the second recess and make one side and the photovoltaic apron of solar wafer bond under the high temperature condition, the another side then bonds with another apron, and need not to set up two-layer glued membrane and realize the bonding of solar wafer two sides, the manufacturing step and the cost of manufacture that have reduced photovoltaic module, and the production efficiency is improved.

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

Fig. 1 is a schematic structural diagram of a photovoltaic system provided by the present invention;

fig. 2 is a schematic structural diagram of a photovoltaic module provided by the present invention;

fig. 3 is a schematic structural diagram of a photovoltaic cover plate provided by the present invention;

fig. 4 is an enlarged schematic view of the photovoltaic cover sheet of fig. 3 at IV;

FIG. 5 is a schematic cross-sectional view of the photovoltaic cover sheet of FIG. 4;

fig. 6 is another schematic structural diagram of the photovoltaic cover plate provided by the present invention;

fig. 7 is a schematic view of another structure of the photovoltaic cover plate provided by the present invention;

fig. 8 is a schematic cross-sectional view of the photovoltaic cover sheet of fig. 7;

fig. 9 is a schematic view of another structure of the photovoltaic cover plate provided by the present invention;

fig. 10 is a schematic plan view of the photovoltaic cover sheet of fig. 9;

fig. 11 is a schematic view of another structure of the photovoltaic cover plate provided by the present invention;

fig. 12 is a schematic plan view of the photovoltaic cover sheet of fig. 11;

fig. 13 is a schematic flow chart of a method for manufacturing a photovoltaic module according to the present invention.

Description of the main element symbols:

the photovoltaic system 1000, the photovoltaic module 100, the photovoltaic cover plate 10, the mounting groove 11, the first groove 111, the filling groove 1111, the step groove 1112, the second groove 112, the filling space 113, the solar cell 20, the adhesive film layer 30, the adhesive 40, and the second cover plate 50.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention. Furthermore, it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "first direction", "second direction", "longitudinal", "transverse", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

In the related art, in order to achieve the internal packaging effect of the photovoltaic module well, the photovoltaic module usually needs to use 2 layers of cover plates, 2 layers of adhesive films, a solar cell matrix, a frame and other materials in the manufacturing process. The function of the adhesive film is mainly to realize that the battery matrix is adhered with the front or back glass/back plate. When two layers of adhesive films are laid, a good adhesion effect can be achieved, but manufacturing steps are increased, production efficiency is reduced, and meanwhile cost is high.

The utility model discloses in, through forming a plurality of mounting grooves 11 on the surface at photovoltaic apron 10, mounting groove 11 includes first recess 111 and the second recess 112 of the first recess 111 of intercommunication, first recess 111 is used for installing solar wafer 20, when solar wafer 20 is installed in first recess 111, solar wafer 20 forms a packing space 113 with the bottom of first recess 111, second recess 112 intercommunication packing space 113, when encapsulating solar wafer 20, only need place solar wafer 20 in first recess 111, lay one deck glued membrane and another apron on photovoltaic apron 10, then make the glued membrane melting can make the glued membrane flow in to packing space 113 from second recess 112 and make the one side of solar wafer 20 bond with photovoltaic apron 10, the another side then bonds with another apron, and need not to set up two-layer glued membrane and realize the bonding of solar wafer 20 two-sides, the manufacturing step and the cost of photovoltaic module 100 have been reduced, and production efficiency has been improved.

Example one

Referring to fig. 1, a photovoltaic system 1000 according to an embodiment of the present invention may include a photovoltaic module 100 according to an embodiment of the present invention, in the present invention, the photovoltaic system 1000 may be applied to a photovoltaic power station, such as a ground power station, a roof power station, a water power station, etc., and may also be applied to an apparatus or a device that utilizes solar energy to generate electricity, such as a user solar power source, a solar street lamp, a solar automobile, a solar building, etc. Of course, it is understood that the application scenario of the photovoltaic system 1000 is not limited thereto, that is, the photovoltaic system 1000 may be applied in all fields requiring solar energy for power generation. Taking a photovoltaic power generation system network as an example, the photovoltaic system 1000 may include a photovoltaic array, a combiner box and an inverter, the photovoltaic array may be an array combination of a plurality of photovoltaic modules 100, for example, the plurality of photovoltaic modules 100 may form a plurality of photovoltaic arrays, the photovoltaic array is connected to the combiner box, the combiner box may combine currents generated by the photovoltaic arrays, and the combined currents are converted into alternating currents required by a utility grid through the inverter and then are connected to the utility grid to realize solar power supply.

Referring to fig. 2, a photovoltaic module 100 according to an embodiment of the present invention may include a first cover plate, a plurality of solar cells 20, a film layer 30, a sealant 40, and a second cover plate 50, wherein the first cover plate may be a photovoltaic cover plate 10 according to an embodiment of the present invention. Referring to fig. 3 to 5, in the embodiment of the present invention, a plurality of mounting grooves 11 are formed on the surface of the photovoltaic cover plate 10, the mounting grooves 11 are arranged in an array, the mounting grooves 11 include a first groove 111 and at least one second groove 112, the second groove 112 communicates with the first groove 111, the solar cell 20 is mounted in the first groove 111, that is, the first groove 111 is used for mounting the solar cell 20, as shown in fig. 5, when the solar cell 20 is mounted in the first groove 111, a filling space 113 is formed between the solar cell 20 and the bottom of the first groove 111, and the second groove 112 communicates with the filling space 113.

Referring to fig. 2, a film layer 30 covers the solar cell 20, a second cover plate 50 covers the film layer 30, the film layer 30 bonds one surface of the solar cell 20 and the second cover plate 50 together, a filling space 113 is filled with a glue 40, the glue 40 is formed by melting the film layer 30 and then flowing into the filling space 113 from the second groove 112, and solidifying the melted glue 40, and the glue 40 bonds the other surface of the solar cell 20 and the first cover plate (i.e., the photovoltaic cover plate 10) together.

The utility model discloses an among photovoltaic apron 10, photovoltaic module 100 and photovoltaic system 1000, photovoltaic apron 10 forms a plurality of mounting grooves 11 on the surface, and mounting groove 11 includes first recess 111 and the second recess 112 of the first recess 111 of intercommunication, and first recess 111 is used for installing solar wafer 20, and when solar wafer 20 was installed in first recess 111, solar wafer 20 formed a packing space 113 with the bottom of first recess 111, and second recess 112 intercommunication packing space 113. Therefore, when the solar cell 20 is packaged, the solar cell 20 is only required to be placed in the first groove 111, one layer of adhesive film and the other cover plate are laid on the photovoltaic cover plate 10, the adhesive film can flow into the filling space 113 from the second groove 112 after being melted, so that one surface of the solar cell 20 is bonded with the photovoltaic cover plate 10 (namely the first cover plate), the other surface of the solar cell is bonded with the other cover plate (the second cover plate 50), and the two surfaces of the solar cell 20 are bonded without being provided with two layers of adhesive films, so that the manufacturing steps and the manufacturing cost of the photovoltaic module 100 are reduced, and the production efficiency is improved.

Specifically, in the embodiment of the utility model provides an in, photovoltaic apron 10 can be the better apron of light transmission performance such as organic glass or inorganic glass, and its thickness is 1.5mm, 1.8mm, 2mm, 2.5mm or 3.2mm etc. specifically does not restrict its thickness here, and the one side of photovoltaic apron 10 is for can be the plane, is formed with a plurality of mounting grooves 11 on the another side. Furthermore, in the illustrated embodiment, the first cover plate may be a front cover plate of the photovoltaic module 100, and the second cover plate 50 may be a back cover plate of the photovoltaic module 100, of course, it is understood that in other embodiments, the first cover plate may also be a back cover plate of the photovoltaic module 100, and the second cover plate 50 may be a front cover plate of the photovoltaic module 100, that is, the front cover plate or the back cover plate of the photovoltaic module 100 may adopt the photovoltaic cover plate 10 in the embodiment of the present invention, and of course, it is understood that, in some possible embodiments, the first cover plate and the second cover plate 50 may be both the photovoltaic cover plate 10 in the embodiment of the present invention, and are not limited herein, and the first cover plate is taken as an example of the front cover plate of the photovoltaic module 100 hereinafter, but this does not limit the specific type of the first cover plate.

The embodiment of the utility model provides an in, solar wafer 20 can be PERC solar wafer, IBC solar wafer or Topcon solar wafer, specifically does not restrict the type of solar wafer 20 here. It can be understood that, when solar wafer 20 is PERC solar wafer and time Topcon solar wafer, first apron and second apron 50 are the better apron of light transmissivity, and both can be the utility model discloses in the embodiment photovoltaic apron 10, perhaps first apron does the utility model discloses in the embodiment photovoltaic apron 10, when solar wafer 20 is IBC solar wafer, photovoltaic module 10's front cover board can be the better apron of light transmissivity, and it can adopt the utility model discloses in the embodiment photovoltaic apron 10, back cover board can be general or the impervious apron of light transmissivity, and it also can adopt for the photovoltaic apron in the embodiment of the utility model provides an embodiment. That is to say, when solar wafer 20 is the IBC solar wafer, the embodiment of the utility model provides a photovoltaic apron 10 can regard as photovoltaic module 10's front cover plate and/or back apron, and when the front cover plate, it can adopt the better material of light transmissivity to support, and when the back apron is regarded as, it can adopt ordinary material to make.

In the embodiment of the present invention, the film layer 30 can be a transparent colloid with good light transmittance and aging resistance, such as EVA adhesive film, POE adhesive film or EPE adhesive film, and can be specifically selected according to actual conditions without limitation. In some embodiments, the photovoltaic cover sheet 10 may be ultra-white organic glass having high light transmittance, high transparency, and excellent physical, mechanical, and optical properties, for example, the light transmittance of the photovoltaic cover sheet 10 may reach more than 80%, which may protect the solar cell sheet 20 without affecting the efficiency of the solar cell sheet 20 as much as possible. Meanwhile, the adhesive film layer 30 and the adhesive 40 in the filling space 113 can bond the photovoltaic cover plate 10 (i.e., the first cover plate), the solar cell sheet 20 and the back plate (i.e., the second cover plate 50 shown in fig. 2) of the photovoltaic module 100 together, and the presence of the adhesive film layer 30 and the adhesive 40 can seal and insulate the solar cell sheet 20 and prevent moisture and water.

Taking the second cover plate 50 as a back cover plate as an example, the second cover plate 50 may be attached to the adhesive film layer 30 on the back of the solar cell 20, the second cover plate 50 may protect and support the solar cell 20, and has reliable insulation, water resistance and aging resistance, the back cover plate may have multiple choices, and may be generally toughened glass, organic glass, an aluminum alloy TPT composite adhesive film, and the like, which may be specifically set according to specific conditions, and is not limited herein. The whole of the second cover plate 50, the solar cell 20, the adhesive film layer 30 and the first cover plate (the photovoltaic cover plate 10) can be disposed on a metal frame, which serves as a main external support structure of the whole photovoltaic module 100 and can stably support and mount the photovoltaic module 100, for example, the photovoltaic module 100 can be mounted at a position where it is required to be mounted through the metal frame.

Further, referring to fig. 3, in the illustrated embodiment, the photovoltaic cover plate 10 may have a rectangular shape, and the plurality of mounting grooves 11 may be arranged on the photovoltaic cover plate 10 in a rectangular array, that is, the plurality of mounting grooves 11 may be arranged in a transverse and longitudinal array of the photovoltaic cover plate 10, but it should be understood that, in other possible embodiments, the plurality of mounting grooves 11 may also be arranged in other array manners, such as a circular array, and the specific array arrangement manner is selected as required, and is not limited herein.

In addition, referring to fig. 3, in the illustrated embodiment, the outer contour of each of the first groove 111 and the second groove 112 on the photovoltaic cover plate 10 may be rectangular, and the outer contour of the solar cell 20 may also be rectangular, but it should be understood that in other embodiments, the outer contour of the first groove 111 may also be other shapes, for example, a triangle, a circle, an ellipse, a trapezoid, or other irregular shapes, and the specific shape may be set according to the shape of the solar cell 20, and only the solar cell 20 needs to be placed in the first groove 111, which is not limited herein.

Meanwhile, the outer contour shape of the second groove 112 may also be other shapes, for example, a triangle, a circle, an ellipse, a trapezoid or other irregular figures, and it is not particularly limited herein, only that the second groove 112 can communicate with the filling space 113 formed by the solar cell 20 and the first groove 111, so that the adhesive film can flow into the filling space 113 after being melted to bond the solar cell 20 and the photovoltaic cover plate 10 together. Of course, it can be understood that, in the embodiment of the present invention, the size of the opening of the first groove 111 may be set to be slightly larger than the size of the solar cell 20 so that the solar cell 20 can be smoothly placed in the first groove 111, and when the solar cell 20 is placed in the first groove 111, the surface of the solar cell 20 may be flush with the surface of the photovoltaic cover plate 10 or lower than the surface of the photovoltaic cover plate 10, which is not limited herein.

Example two

Referring to fig. 3 to 5, in some embodiments, the side wall surface where the first groove 111 and the second groove 112 intersect is an inclined surface.

Therefore, the side wall surface of the intersection of the first groove 111 and the second groove 112 is set as an inclined surface, so that the melted adhesive film can be better guided to flow into the filling space 113 to form the adhesive 40 for filling the filling space 113, the filling speed is increased, and the production efficiency is improved.

Further, referring to fig. 3 to 5, in such an embodiment, a side wall surface where the first recess 111 intersects with the second recess 112 is inclined from the bottom surface of the first recess 111 to an outer side of the bottom surface of the first recess 111.

Thus, the side wall surface where the first groove 111 and the second groove 112 intersect is inclined from the bottom surface to the outer side of the bottom surface, so that the adhesive film can flow into the filling space 113 more quickly and smoothly after being melted. Meanwhile, since the side wall of the first groove 111 is inclined toward the outer side of the bottom surface, the first groove 111 is gradually reduced along the depth direction, so that the overall volume of the filling space 113 can be reduced to improve the filling efficiency, and the filled colloid 40 and the solar cell 20 can be ensured to have a larger bonding area to improve the bonding performance.

Of course, it is understood that in other possible embodiments, the side wall surface where the first groove 111 and the second groove 112 intersect is inclined from the bottom surface of the first groove 111 to the inner side of the bottom surface of the first groove 111, and is not limited herein. Furthermore, it is understood that in some embodiments, the side wall surfaces of the first groove 111 and the second groove 112 intersecting with each other may also be straight surfaces, and in this context, "the side wall surface is straight" may be understood as being perpendicular to the upper and lower surfaces of the photovoltaic cover plate 10, and hereinafter, if the description about "straight" is provided, it may also be understood by referring to this.

EXAMPLE III

Referring to fig. 4 and 6, in some embodiments, the number of the second grooves 112 of each mounting groove 11 may be multiple, and the multiple second grooves 112 may be located on different sides of the first groove 111.

Like this, thereby the glued membrane melts back accessible a plurality of second recess 112 flow into fill in space 113 and fill and improve filling efficiency, simultaneously, set up a plurality of second recess 112 and can improve the bonding area of the glued membrane layer 30 that forms after the solidification and photovoltaic apron 10 in order to improve bonding performance.

Specifically, referring to fig. 4, in the illustrated embodiment, two sides of the first groove 111 are respectively provided with one second groove 112, but it should be understood that in other embodiments, at least one second groove 112 may be formed around the first groove 111, for example, as shown in fig. 6, one second groove 112 is provided in each of the upper, lower, left and right directions of the first groove 111, and of course, in other embodiments, a plurality of second grooves 112 may be provided in each of the upper, lower, left and right directions of the first groove 111, which is not limited herein.

Example four

Referring to fig. 7 and 8, in some embodiments, the first groove 111 may include a filling groove 1111 and a step groove 1112 located at the top of the filling groove 1111, the step groove 1112 is used for carrying the solar cell 20, the second groove 112 communicates with the filling groove 1111, when the solar cell 20 is placed on the step groove 1112, the solar cell 20 covers the filling groove 1111 to form a filling space 113, and the depth of the step groove 1112 is smaller than the depth of the second groove 112.

Thus, the step groove 1112 can be used for bearing, positioning and limiting the solar cell 20, thereby preventing the photovoltaic module 100 from having low yield due to the phenomena of cell string deviation, combination, substandard safety distance and the like in the process of packaging in an assembly line.

Specifically, in the embodiment of the present invention, a plurality of solar cells 20 may be connected in series to form a plurality of solar cell strings, and then each solar cell 20 of the solar cell strings is positioned and placed in the step groove 1112 of the first groove 111 to form a cell square matrix. It can be understood that, in the related art, the photovoltaic module usually welds the battery piece into the battery string first, then arrange the battery string case requirement into the battery piece square matrix, paste the location sticky tape between the battery string in order to fix a position the battery string, however, when the subassembly was operated on the assembly line, this stage still appears holistic skew easily before getting into the laminator and accomplishing the lamination, arouses that the subassembly is parallelly connected or the series connection is bad and quality problems such as safe distance is not enough, fragments, and in the embodiment of the utility model, solar wafer 20 can be placed in step groove 1112, the setting of step groove 1112 can be fixed a position and spacing solar wafer 20 in order to reach the effect that each solar wafer 20 of battery string can's each be unable skew all around, can save the operation step of bonding location sticky tape, effectual photovoltaic module 100 of avoiding appearing string skew and piece skew, parallel slice, safe distance not up to standard scheduling problem under the condition that reduces technology step.

It can be understood that, in order to support, position and limit the solar cell piece 20 to avoid the offset, the embodiment of the present invention provides that the size of the step groove 1112 may be slightly larger than the size of the solar cell piece 20, for example, the size of the solar cell piece 20 may be 182mm × 91mm, the size of the step groove 1112 may be set to 182.5mm × 91.5mm, and the tolerance is 0.5mm, so that the step groove 1112 may position and limit the solar cell piece 20 to avoid the phenomenon of the offset of the solar cell piece during the packaging process of the photovoltaic module 100, and the step of pasting the positioning tape may also be omitted.

Furthermore, in the embodiment of the present invention, the depth of the step groove 1112 may be slightly greater than the thickness of the solar cell 20 or equal to the thickness of the solar cell 20, for example, the thickness of the solar cell 20 may be 0.17mm, the depth of the step groove 1112 may be set to 0.3mm, and the tolerance may be 0.1mm, so that the solar cell 20 may be completely accommodated in the step groove 1112, and it can be understood that, when the solar cell 20 is placed in the step groove 1112, the surface of the solar cell 20 may be flush with the surface of the photovoltaic cover plate 10 or lower than the surface of the photovoltaic cover plate 10, which is not limited herein.

Furthermore, it can be understood that, in order to fill the filling space 113 by enabling the adhesive film to smoothly flow into the filling groove 1111 after melting, the depth of the step groove 1112 is smaller than the depth of the second groove 112, for example, the difference between the depth of the second groove 112 and the depth of the step groove 1112 may be about 0.2mm to about 0.4mm, for example, the depth of the bottom surface of the step groove 1112 may be about 0.3mm, and the depth of the second groove 112 may be about 0.5mm to about 0.7 mm.

In addition, in the embodiment of the present invention, in order to facilitate accurate placement of the solar cell 20, the width dimension of the second groove 112 may be set to be smaller than the width dimension of the solar cell 20, for example, the width of the solar cell 20 is 91mm, and then the width dimension of the second groove 112 may be set to 45mm, so that the solar cell 20 can be prevented from shifting into the second groove 112 when the solar cell 20 is placed.

Further, referring to fig. 7 and 8, in such an embodiment, a side wall surface where the filling groove 1111 intersects with the second groove 112 may be an inclined surface and inclined from a bottom surface of the filling groove 1111 to an outer side of the bottom surface of the filling groove 1111.

Thus, the sidewall of the intersection between the filling groove 1111 and the second groove 112 is inclined from the bottom to the outside of the bottom, so that the adhesive film can flow into the filling space 113 more rapidly and smoothly after being melted. Meanwhile, since the side walls are inclined toward the outer side of the bottom surface, the filling grooves 1111 are gradually reduced in the depth direction, so that the overall volume of the filling space 113 can be reduced to improve the filling efficiency, and the filled colloid 40 and the solar cell 20 can be ensured to have a larger bonding area to improve the bonding performance.

Of course, it is understood that in other embodiments, the filled sidewall surfaces may be straight surfaces, and are not limited thereto. In addition, it can also be understood that, in the embodiment of the present invention, each side wall surface of the step groove 1112 may be a straight surface or an inclined surface, and is not limited herein.

EXAMPLE five

In some embodiments, the bottom surface of the second groove 112 may also be a slope and inclined to the side where the first groove 111 is located.

Thus, the bottom surface of the second groove 112 is set to be an inclined surface, and the inclined surface is inclined to the side where the first groove 111 is located, so that the glue 40 after the glue film is melted can more easily flow into the filling space 113 along the inclined surface at the bottom to improve the filling efficiency, and meanwhile, the bottom surface of the second groove 112 is set to be an inclined surface, so that the bonding area between the glue film layer 30 and the photovoltaic cover plate 10 can be further improved to improve the bonding performance compared with the straight surface which is parallel to the surface of the photovoltaic cover plate 10.

Of course, it is understood that in some embodiments, the bottom surface of the second groove 112 may be a straight surface parallel to the upper and lower surfaces of the photovoltaic sheathing panel 10, and the bonding performance is not limited thereto.

In addition, in some embodiments, the side wall surface of the second groove 112 may also be provided with an inclined surface, so that after the adhesive film is melted, the adhesive 40 can flow into the second groove 112 along the side wall surface of the second groove 112 and flow into the filling space 113 for filling and bonding.

Example six

Referring to fig. 9 and 10, in some embodiments, the photovoltaic cover plate 10 is provided with a plurality of mounting grooves 11 at intervals along both a first direction and a second direction, the first direction intersects with the second direction, and the second grooves 112 of two adjacent mounting grooves 11 in the first direction are communicated with each other.

In this way, the second grooves 112 of two adjacent mounting grooves 11 in the first direction are communicated with each other, so that the fluid formed after the adhesive film is melted can flow between two adjacent filling spaces 113 in the first direction, and thus, the uniformity of filling of each filling space 113 in the first direction can be ensured in the laminating process. From another perspective, in such an embodiment, the requirement for the thickness uniformity of the laid adhesive film can be reduced, even if there is a non-uniform thickness of the adhesive film, since the second grooves 112 of two adjacent mounting grooves 11 in the first direction are communicated, after the adhesive film is melted, the fluid formed after melting can be enabled to flow between the respective filling spaces 113 in the first direction by laminating through a laminator so as to ensure the filling uniformity of the respective filling spaces 113.

Specifically, referring to fig. 10, in such an embodiment, the first direction may be a transverse direction of the photovoltaic cover plate 10, and the second direction may be a longitudinal direction of the photovoltaic cover plate 10, in the illustrated embodiment, the two sides of the first groove 111 of the mounting groove 11 arranged along the transverse direction of the photovoltaic cover plate 10 may be provided with the second grooves 112, and the second grooves 112 of two adjacent mounting grooves 11 are communicated with each other, that is, in such an embodiment, the second grooves 112 of two adjacent mounting grooves 11 may be communicated together to form a large groove. It is understood that, in such an embodiment, the bottom surfaces of the two second grooves 112 of two adjacent mounting grooves 11 in the transverse direction may be respectively inclined toward the side where the first groove 111 of the respective mounting groove 11 is located, the bottom surfaces of the two second grooves 112 may be flush, or the bottom surfaces of the two second grooves 112 jointly form a slope toward the side where any one first groove 111 of two adjacent mounting grooves 11 is located, which is not limited herein.

Further, referring to fig. 11 and 12, in some embodiments, the second grooves 112 of two adjacent mounting grooves 11 in the second direction can also be communicated with each other. In this way, the second grooves 112 of two adjacent mounting grooves 11 in the second direction are communicated with each other, so that fluid formed after the adhesive film is melted can flow between two adjacent filling spaces 113 in the second direction, and thus, in the laminating process, the filling uniformity of each filling space 113 in the second direction can be ensured, and meanwhile, the requirement on the uniformity of the adhesive film can be reduced.

Specifically, referring to fig. 11 and 12, in the illustrated example, both sides of the first groove 111 of the mounting groove 11 arranged in the longitudinal direction of the photovoltaic sheathing panel 10 may be provided with the second grooves 112, and two second grooves 112 of two mounting grooves 11 adjacent in the longitudinal direction communicate with each other. It is understood that, in such an embodiment, the bottom surfaces of two adjacent second grooves 112 in the longitudinal direction may be respectively inclined to the side where the first groove 111 of each mounting groove 11 is located, the bottom surfaces of the two second grooves 112 may be flush, or the bottom surfaces of the two second grooves 112 together form a slope to the side where any one first groove 111 of two adjacent mounting grooves 11 is located, which is not limited herein.

It is understood that, in the embodiment of the present invention, the mounting grooves 11 of the photovoltaic cover plate 10 may be configured such that the second grooves 112 of two adjacent mounting grooves 11 along the first direction are communicated with each other, or the second grooves 112 of two adjacent mounting grooves 11 along the second direction are communicated with each other or both (as shown in fig. 11 and 12), and the present invention is not limited thereto.

Furthermore, it is understood that in other embodiments, the first direction and the second direction may not be the transverse direction and the longitudinal direction of the photovoltaic sheathing board 10, and the specific direction may be determined according to the arrangement direction of the mounting grooves 11, for example, in some embodiments, the mounting grooves 11 may be arranged in an array along two diagonal lines of the photovoltaic sheathing board 10, in which case, the first direction and the second direction are respectively two diagonal lines of the photovoltaic sheathing board 10, and are not limited herein.

EXAMPLE seven

In some embodiments, the depth of each of the first and second grooves 111, 112 is less than or equal to half the thickness of the photovoltaic cover sheet 10.

In this way, the depth of each of the first groove 111 and the second groove 112 is set to be less than half of the thickness of the photovoltaic cover plate 10, so that the photovoltaic cover plate 10 is prevented from being easily broken due to the fact that the depth of the grooves is too deep and the mechanical performance of the photovoltaic cover plate 10 is greatly reduced.

Specifically, in such an embodiment, the depth of the second groove 112 may be set to be substantially the same as the depth of the first groove 111, so that the glue 40 formed after the glue film is melted can more easily and quickly flow into the filling space 113, and of course, in other embodiments, the depth of the second groove 112 may be smaller than the depth of the first groove 111, only when the solar cell 20 is placed in the first groove 111, the second groove 112 may communicate with the filling space 113, so as to avoid an increased risk of the photovoltaic cover plate 10 being cracked due to more deep grooves.

Example eight

Referring to fig. 13, the present embodiment provides a method for manufacturing a photovoltaic module 100, which includes the steps of:

s10: providing a first cover plate and a plurality of solar cells 20, wherein the first cover plate can be the photovoltaic cover plate 10 described in any of the above embodiments;

s20: placing the solar cells 20 in the first grooves 111 to form a filling space 113 with the bottom of the first grooves 111, wherein each first groove 111 corresponds to at least one solar cell 20;

s30: laying an adhesive film on the solar cell 20;

s40: laying a second cover plate 50 on the adhesive film;

s50: the first cover plate and/or the second cover plate 50 are/is pressed, the adhesive film is melted under high temperature, and the adhesive film partially flows into the second groove 112 and the filling space 113 to achieve the adhesion of the solar cell piece 20 with the first cover plate and the second cover plate 50.

So, when preparing and encapsulating photovoltaic module 100, only need to place solar wafer 20 in first recess 111 of first apron, then lay one deck glued membrane and second apron 50 on first apron, then make the glued membrane melting under the high temperature condition can make the glued membrane can flow into to filling space 113 from second recess 112 and make one side and the first apron of solar wafer 20 bond, the another side then bonds with the second dry plate apron, and need not to set up two-layer glued membrane and realize the bonding of solar wafer 20 two sides, the manufacturing step and the cost of manufacture that have reduced photovoltaic module 100 have improved production efficiency.

Specifically, in step S10, a first cover plate may be laid on the production line, then the solar cells 20 are grouped and connected in series to form a plurality of solar cell strings, and then the solar cell strings are placed on the first cover plate to form a cell square matrix, each first groove 111 may correspond to at least one solar cell 20, preferably the solar cells 20 and the first groove 111 one by one, after the placement is completed, it is determined that the solar cell 20 is centered and is not damaged, so as to achieve the effect that each cell of the cell string is positioned and limited and cannot be shifted back and forth and left and right, for example, the solar cell 20 may be placed on the step groove 1112 of the first groove 111 one to achieve the positioning and limiting.

After the solar cell 20 is placed, a layer of adhesive film may be laid on the cell array formed by the solar cells 20, the adhesive film is centered and has no obvious skew or obvious dirt, and then the second cover plate 50 is laid on the adhesive film.

In step S50, the laid photovoltaic module 100 may be sent to a laminator for lamination, when the adhesive film is melted at a high temperature, the adhesive film may flow into the second groove 112 and flow into the filling space 113 formed by the solar cell 20 and the first groove 111 from the second groove 112, and then the adhesive film is cooled and solidified to bond the solar cell 20 with the first cover plate and the second cover plate 50, so that the effect that the cell array and the front and back cover plates can be still bonded can be achieved after a layer of adhesive film is omitted, one step of adhesive film laying process is reduced, and the production efficiency is improved.

Furthermore, it can also be understood that, in the embodiment of the present invention, before the adhesive film is laid, each battery string may be connected in series or in parallel through the bus bar to collect and conduct the current.

In addition, in the embodiment of the present invention, the first cover plate and the second cover plate may be a front cover plate and a back cover plate of the photovoltaic module 100, respectively, when the first cover plate is the front cover plate, when the solar cell 20 is laid, the front surface of the solar cell 20 may be laid downward in the first groove 111 of the first cover plate so that the front surface of the solar cell 20 and the bottom of the first groove 111 form the filling space 113, when the first cover plate is the back cover plate, the back surface of the solar cell 20 may be laid downward in the first groove 111 of the first cover plate so that the back surface of the solar cell 20 and the bottom of the first groove 111 form the filling space 113, specifically, the specific types of the first cover plate and the second cover plate 50 are not present, and when one of the first cover plate and the second cover plate is the front cover plate, the other is the back cover plate. Moreover, it can be understood that, in the photovoltaic module 100 of the present invention, both the first cover plate and the second cover plate 50 can adopt the photovoltaic cover plate 10 in the embodiment of the present invention.

In the description herein, references to the description of the terms "some embodiments," "exemplary embodiments," "examples," "specific examples," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In addition, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (11)

1. The utility model provides a photovoltaic apron for photovoltaic module, its characterized in that, photovoltaic apron forms a plurality of mounting grooves on the surface, and is a plurality of the mounting groove array is arranged, the mounting groove includes first recess and at least one second recess, second recess intercommunication first recess, first recess is used for installing solar wafer installs when in the first recess, solar wafer with the bottom of first recess forms a packing space, second recess intercommunication the packing space.

2. The photovoltaic cover sheet of claim 1, wherein the side wall surfaces where the first groove intersects the second groove are beveled.

3. The photovoltaic cover sheet of claim 2, wherein the side wall surfaces where the first groove intersects the second groove are inclined from the bottom surface of the first groove to the outside of the bottom surface of the first groove.

4. The photovoltaic cover plate according to claim 1, wherein the first groove comprises a filling groove and a step groove located at the top of the filling groove, the step groove is used for bearing the solar cell, the second groove is communicated with the filling groove, when the solar cell is placed on the step groove, the solar cell covers the filling groove to form the filling space, and the depth of the bottom surface of the step groove is smaller than that of the second groove.

5. The photovoltaic cover sheet according to claim 4, wherein the side wall surface where the filling groove intersects with the second groove is a slope and slopes from the bottom surface of the filling groove to the outside of the bottom surface of the filling groove.

6. The photovoltaic cover sheet of claim 4, wherein the bottom surface of the second groove is a slope and slopes toward the side where the first groove is located; and/or

The side wall surface of the second groove is an inclined surface.

7. The photovoltaic cover sheet of claim 1, wherein the number of the second grooves is plural, and the plural second grooves are located on different sides of the first groove.

8. The photovoltaic cover plate according to claim 1, wherein the photovoltaic cover plate is provided with a plurality of mounting grooves at intervals along both a first direction and a second direction, and the first direction is crossed with the second direction;

the second grooves of two adjacent mounting grooves in the first direction are communicated with each other; and/or

The second grooves of two adjacent mounting grooves in the second direction are communicated with each other.

9. The photovoltaic cover sheet of claim 1, wherein the depth of each of the first and second grooves is less than or equal to half the thickness of the photovoltaic cover sheet.

10. A photovoltaic module, comprising:

a first cover sheet, said first cover sheet being the photovoltaic cover sheet of any one of claims 1-9;

the solar cell pieces are arranged in the first grooves, at least one solar cell piece is arranged in each first groove, and a filling space is formed between each solar cell piece and the bottom of each first groove;

the adhesive film layer covers the solar cell piece;

the colloid is filled in the filling space, and the colloid flows into the filling space from the second groove after the colloid layer is melted to form the adhesive tape; and

and the second cover plate covers the adhesive film layer.

11. A photovoltaic system comprising the photovoltaic module of claim 10.

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