CN213927156U - Photovoltaic metal backboard, photovoltaic roof part and roof structure - Google Patents

Abstract

The utility model provides a pair of photovoltaic metal backplate, photovoltaic roof spare and roofing structure, photovoltaic metal backplate includes: the battery cover plate comprises a groove bottom and two side wall parts, wherein the two side wall parts are respectively arranged at two sides of the groove bottom; an upper lug and a lower lug are formed on the outer side of the side wall part, the upper lug, the side wall part and the lower lug form a mounting groove, and the mounting groove extends along the extending direction of the accommodating groove. The utility model discloses in, when installing photovoltaic roofing spare at the roofing, can realize the installation through the joint between mounting groove and the roofing structure, the installation rapidly, convenient, the reliability is high to will hang down the installation degree of difficulty of photovoltaic roofing spare, improved the reliability of photovoltaic roofing spare installation, reduced the probability that photovoltaic roofing spare drops, make the fixed safer of whole roofing structure.

Description

Photovoltaic metal backboard, photovoltaic roof part and roof structure

Technical Field

The utility model relates to a photovoltaic technology field especially relates to a photovoltaic metal back plate, photovoltaic roof spare and roofing structure.

Background

The solar Photovoltaic power generation technology becomes a main direction for developing and utilizing new energy, wherein Building Integrated Photovoltaics (BIPV) is a novel Photovoltaic application mode combining a Photovoltaic module and a Building, and has a wide market prospect.

BIPV is a technology of integrating solar power (photovoltaic) products to buildings, the BIPV products in the current market usually adopt an aluminum alloy frame, pack the periphery of a component composed of a photovoltaic cell panel, an insulating layer, an encapsulating layer, a high transparent glass cover plate and the like to form a photovoltaic module, and pass an output wire of the photovoltaic module through the aluminum alloy frame at the bottom, and are connected with a junction box arranged at the outer side of the aluminum alloy frame, so that current generated by the photovoltaic cell panel is led out, and a clamp is arranged at the bottom of the frame, so that the photovoltaic module is fixed on a color steel tile of a building by utilizing the clamp, or the bottom of the frame is directly fixed on the color steel tile of the building in a structural adhesive bonding mode.

However, in the current scheme, since the color steel tile is thin, when external wind force is large, the photovoltaic module installed by using the fixture is easy to fall off from the color steel tile, and the fixing mode by using the structural adhesive is easy to be limited by the construction environment, so that the installation reliability is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a photovoltaic metal backplate, photovoltaic roof spare and roofing structure aims at promoting the connection reliability and the convenience of photovoltaic metal backplate and roofing to reduce the installation degree of difficulty of photovoltaic roof spare, and the probability that photovoltaic roof spare drops.

In a first aspect, an embodiment of the present invention provides a photovoltaic metal back plate, the photovoltaic metal back plate includes:

the battery pack comprises a groove bottom and two side wall parts, wherein the two side wall parts are respectively arranged at two sides of the groove bottom, and the groove bottom and the two side wall parts form a containing groove for containing a cover plate and a battery piece;

an upper lug and a lower lug are formed on the outer side of the side wall part, and the upper lug, the side wall part and the lower lug form a mounting groove which extends along the extending direction of the accommodating groove.

Optionally, the lower lug is formed by bending and folding back one side of the side wall portion close to the groove bottom portion, so as to form a lower lug groove on the side wall portion, and the lower lug groove is communicated with the accommodating groove.

Alternatively to this, the first and second parts may,

the upper lug includes a first baffle extending outwardly on a side of the sidewall portion remote from the trough bottom;

the upper lug also comprises a second baffle plate which is formed by folding and extending the first baffle plate inwards, and an upper lug groove is formed between the first baffle plate and the second baffle plate.

Optionally, the second baffle extends beyond a plane where the sidewall portion is located.

Optionally, the photovoltaic metal back plate includes an aluminum-zinc plated steel plate, the thickness of the photovoltaic metal back plate is 0.1 to 1 mm, the yield strength of the photovoltaic metal back plate is 100 to 1000 mpa, and the gram weight of the aluminum plated layer is 10 to 200 g/m.

In a second aspect, the embodiment of the utility model provides a photovoltaic roofing spare, photovoltaic roofing spare includes: the photovoltaic metal back plate comprises a photovoltaic metal back plate, an insulating filling layer, a cover plate, a battery piece and a packaging layer;

the insulating filling layer is arranged at the bottom of the accommodating groove;

the battery piece is arranged in the packaging layer, and the packaging layer is arranged on one side of the insulating filling layer, which is far away from the bottom of the groove;

the cover plate is arranged on one side, away from the insulating filling layer, of the packaging layer.

Optionally, the photovoltaic roof part further comprises: a bus bar and a junction box;

the junction box is arranged on one surface of the cover plate, which is far away from the bottom of the groove;

the cover plate is provided with a through hole, the bus bar penetrates through the through hole, one end of the bus bar is connected with the battery piece, and the other end of the bus bar is connected with the junction box.

Optionally, one surface of the cover plate facing away from the encapsulation layer is flush with the top of the photovoltaic metal back plate.

In a third aspect, an embodiment of the present invention provides a roofing structure, the roofing structure includes: the photovoltaic roof comprises a plurality of photovoltaic roof parts, end fixing parts, a first connecting part and a second connecting part;

the photovoltaic roof parts at the end parts are connected with the roof through the end part fixing parts;

the first connecting piece and the second connecting piece are of I-shaped structures, first connecting grooves are formed in two sides of the first connecting piece, and second connecting grooves are formed in two sides of the second connecting piece;

and the upper lug in the photovoltaic metal back plate is matched with the first connecting groove of the first connecting piece, and the lower lug in the photovoltaic metal back plate is matched with the second connecting groove of the second connecting piece.

Optionally, the end fixing comprises a protruding structure and an end main body which are connected with each other;

the end fixing piece is connected with the photovoltaic roof piece through clamping connection of the mounting groove and the protruding structure;

the end main body is connected with the roof in any one mode of welding, riveting and nut connection.

The embodiment of the utility model provides a pair of photovoltaic metal backplate, photovoltaic roofing spare and roofing structure, the lateral wall portion of photovoltaic metal backplate is provided with the mounting groove, consequently, when installing photovoltaic roofing spare at the roof, can realize the installation through the joint between mounting groove and the roofing structure, the installation is rapid, convenient, the reliability is high, thereby the installation degree of difficulty that will hang down photovoltaic roofing spare has improved the reliability of photovoltaic roofing spare installation, the probability that photovoltaic roofing spare drops has been reduced, make the fixed safer of whole roofing structure.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 shows a schematic structural view of a photovoltaic roof member in an embodiment of the present invention;

fig. 2 shows a schematic cross-sectional view of a photovoltaic metal backsheet in an embodiment of the present invention;

fig. 3 shows a schematic perspective view of a photovoltaic metal base plate in an embodiment of the present invention;

fig. 4 shows a schematic external view of a photovoltaic roof element according to an embodiment of the present invention;

fig. 5 shows a schematic structural diagram of a filling layer in an embodiment of the present invention;

fig. 6 shows a schematic structural diagram of an insulating layer in an embodiment of the present invention;

fig. 7 shows a schematic structural diagram of an encapsulation layer in an embodiment of the present invention;

fig. 8 shows a schematic structural diagram of a battery plate in an embodiment of the present invention;

fig. 9 shows a schematic structural view of a roofing structure in an embodiment of the invention;

fig. 10 shows a schematic structural view of an end fixing according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a photovoltaic roof part in an embodiment of the present invention, the photovoltaic roof part includes a photovoltaic metal back plate 10, an insulating filling layer 20, a cover plate 50, a battery sheet 30, and an encapsulation layer 40. Further, referring to fig. 2, fig. 2 shows a schematic cross-sectional view of a photovoltaic metal back plate in an embodiment of the present invention, the photovoltaic metal back plate 10 includes: the battery pack comprises a groove bottom 11 and two side wall parts 12, wherein the two side wall parts 12 are respectively arranged at two sides of the groove bottom 11, and the groove bottom 11 and the two side wall parts 12 form accommodating grooves for accommodating a cover plate and battery pieces; the outer side of the side wall portion is formed with upper lug 13 and lower lug 14, and upper lug 13, side wall portion 12 and lower lug 14 constitute the mounting groove, and the mounting groove extends along the extending direction of storage tank, and fig. 3 shows the three-dimensional structure sketch map of a photovoltaic metal backboard in the embodiment of the present invention, refer to fig. 3, and the mounting groove extends along the extending direction a of storage tank.

The embodiment of the utility model provides an in, insulating filling layer 20 can set up in the bottom of the storage tank of photovoltaic metal backplate 10, battery piece 30 can be encapsulated in the inside of encapsulated layer 40, and encapsulated layer 40 can set up in the one side that insulating filling layer 20 deviates from tank bottom 11, and apron 50 sets up in the one side that encapsulated layer 40 deviates from insulating filling layer 20, forms photovoltaic roof spare.

Specifically, the photovoltaic metal back sheet 10 may be obtained by a metal substrate through a molding process, that is, a structure that is formed by the groove bottom 11 and the two side wall portions 12 and is recessed toward a roof purlin direction is formed, and the battery piece 30 and the cover plate 50 may be disposed in the accommodation groove formed by the groove bottom 11 and the two side wall portions 12 and bonded to the groove bottom 11 through the insulating filling layer 20, so that the photovoltaic metal back sheet 10 may bear the battery piece 30 and the cover plate 50.

Further, in order to ensure the bonding strength between the photovoltaic metal back plate 10 and other components, the insulating filling layer 20 may include a filling layer 21 and an insulating layer 22, the filling layer 21 and the insulating layer 22 are sequentially disposed at the bottom 11 of the groove, the material of the filling layer 21 may be a material with high viscosity, so as to ensure the bonding strength, and the insulating layer 22 realizes the insulating isolation between the cell sheet 30 and the photovoltaic metal back plate 10.

To sum up, in the embodiment of the utility model provides an in, the lateral wall portion of photovoltaic metal backplate is provided with the mounting groove, consequently, when installing photovoltaic roofing spare at the roofing, can realize the installation through the joint between mounting groove and the roofing structure, the installation rapidly, convenient, the reliability is high to the installation degree of difficulty that will hang down photovoltaic roofing spare has improved the reliability of photovoltaic roofing spare installation, has reduced the probability that photovoltaic roofing spare drops, makes whole roofing structure's fixed safer.

Alternatively, referring to fig. 2, the lower lug 14 is formed by bending and folding back a side of the side wall portion 12 close to the groove bottom portion 11 to form a lower lug groove on the side wall portion 11, wherein the lower lug groove is communicated with the accommodating groove.

Further, two lateral walls of lower lug groove are separated by a first preset distance, so that lower lug 14 forming the mounting groove has a certain height, and the mounting groove is more safe and reliable when being clamped with a roof structure.

Alternatively, referring to fig. 2, the upper lug 13 includes a first baffle 131 extending outwardly from the side wall portion 12 remote from the tank bottom 11. Further optionally, the upper lug 13 further includes a second baffle 132 extending from the first baffle 131 back inwards, and an upper lug groove is formed between the first baffle 131 and the second baffle 132.

Further, the one end of first baffle 131 is connected with lateral wall portion 12, and the other end of first baffle 131 inwards folds back and extends second baffle 132 to form the last otic placode 13 that deviates from the storage tank in the upper end of lateral wall portion 12 of photovoltaic metal backboard, form the last otic placode that communicates with the storage tank between first baffle 131 and the second baffle 132, two lateral walls of going up the otic placode are first baffle 131 and second baffle 132 promptly, and the distance is predetermine to the interval second between first baffle 131 and the second baffle 132, makes the last otic placode 13 that constitutes the mounting groove have certain height, thereby safer and reliable when passing through mounting groove and roofing structure joint.

The embodiment of the utility model provides an in, first preset distance and second preset distance can equal, also can the inequality, first preset distance and second preset distance can be for 20 to 40 millimeters.

In addition, referring to fig. 1, the lower lug 14 is formed by bending and folding the side of the side wall portion 12 close to the groove bottom 11, so that a lower lug groove communicated with the accommodating groove is formed on the side wall portion 12, before the filling layer 21 is filled and set, the lower lug groove is melted by high temperature and placed in the accommodating groove, and then flows into the lower lug groove, after the filling layer 21 is cured, the filling layer 21 can be filled into the lower lug groove protruding outwards, so that the bonding firmness of the filling layer 21 and the photovoltaic metal back plate 10 can be improved, and the probability that the filling layer 21 falls off from the bottom of the accommodating groove is reduced.

With reference to fig. 1, the size of the cover plate 50 is slightly smaller than the size of the receiving groove, so that the cover plate can be conveniently placed in the receiving groove. On the other hand, a certain gap is formed between the cover plate 50 and the side wall portion 12, so that the cover plate 50 is prevented from directly contacting the side wall portion 12, and hard touch is avoided; the overflowing glue of the packaging layer 40 can enter the upper ear groove through the gap, and the overflowing glue can realize good packaging of the battery piece 30 at the same time, so that water vapor is prevented from entering. If the cover plate 50 is in direct contact with the sidewall 12, the molecules of water vapor are small and can enter the battery cell 30 through the space between the cover plate 50 and the sidewall 12, which are in direct contact, because the cover plate 50 and the sidewall 12 cannot be effectively sealed. The cover plate 50 is not in direct contact with the side wall part 12, so that the overflowing glue can fully fill the area, and further, the channel for water vapor to enter is sealed; while the flash may also act as a resilient cushion between the cover plate 50 and the sidewall portion 12.

Alternatively, referring to fig. 2, the second baffle 132 extends beyond the plane of the sidewall 12, and may extend beyond the side close to the accommodating groove by a third predetermined distance. The part that second baffle 132 extends out more than like this can block that the excessive glue spills over outside the photovoltaic roof part, and the direction is excessive to glue gets into in the upper ear groove to the outward appearance is clean and tidy. Meanwhile, the extended part of the second baffle 132 can prevent the sunlight from directly irradiating the glue overflow under the second baffle, which causes the problem of glue overflow aging in the gap.

Optionally, the photovoltaic metal back plate is an aluminum-zinc-plated steel plate, the thickness of the photovoltaic metal back plate is 0.1 to 1 mm, the yield strength of the photovoltaic metal back plate is 100 to 1000 mpa, and the gram weight of the aluminum-plated layer is 10 to 200 g/m.

The embodiment of the utility model provides an in, the material of photovoltaic metal backplate can be including the zinc-plated steel of aluminium, and the zinc-plated steel sheet of aluminium can satisfy the outdoor application demand of building, and it satisfies product application environment's demand as building roof standard product, and outdoor service life can reach more than 20 years.

Referring to fig. 1, the embodiment of the utility model provides a photovoltaic roofing spare, photovoltaic roofing spare includes: the photovoltaic metal back plate 10, the insulating filling layer 20, the cover plate 50, the cell sheet 30 and the packaging layer 40; the insulating filling layer 20 can be disposed at the bottom of the accommodating groove of the photovoltaic metal back plate 10, the battery piece 30 can be packaged inside the packaging layer 40, the packaging layer 40 can be disposed on one side of the insulating filling layer 20 departing from the groove bottom 11, and the cover plate 50 is disposed on one side of the packaging layer 40 departing from the insulating filling layer 20.

Optionally, referring to fig. 4, fig. 4 shows an appearance schematic diagram of a photovoltaic roof part in an embodiment of the present invention, the photovoltaic roof part may further include: the photovoltaic metal backboard comprises bus bars and a junction box 60, wherein the junction box 60 can be arranged on one side, away from the bottom of a containing groove, of a cover plate 50, through holes can be formed in the cover plate 50, the bus bars penetrate through the through holes, one ends of the bus bars are connected with battery pieces in the containing groove of the photovoltaic metal backboard, the other ends of the bus bars are connected with the junction box 60, and the size and the position of the through holes are determined according to the circuit design of a photovoltaic roof piece.

The embodiment of the utility model provides an in, one side that photovoltaic roofing spare is close to the tank bottom of storage tank can contact with roofing structure, one side that photovoltaic roofing spare kept away from the tank bottom of storage tank sets up the apron to the sunlight can carry out photoelectric conversion on the battery piece through transparent apron, and install the terminal box in the one side of the tank bottom of storage tank is kept away from to the apron, if the terminal box breaks down, then can be under the condition of not dismantling photovoltaic roofing spare, maintain the junction box, the maintenance process is quick, convenient. In a particular embodiment, the cover plate may be a glass cover plate.

Optionally, referring to fig. 1, the cover plate 50, the battery plate 30 and the encapsulation layer 40 are disposed in the accommodating groove of the photovoltaic metal back plate 10, and a surface of the cover plate 50 facing away from the encapsulation layer 40 is flush with the top of the photovoltaic metal back plate 10.

The embodiment of the utility model provides an in, can be through the thickness of the material of control each layer for under the condition of above-mentioned all layer stack settings in the storage tank, apron 50 deviates from the one side of encapsulated layer 40 and flushes with photovoltaic metal backplate 10's top, thereby avoids the roofing to produce the difference in height, prevents that water and dust from gathering in difference in height department, thereby plays the effect of preventing ponding, preventing laying dust.

Optionally, referring to fig. 5, fig. 5 shows a schematic structural diagram of a filling layer in an embodiment of the present invention, and the material of the filling layer 21 includes any one of polyurethane, ethylene-vinyl acetate, ethylene-acrylic acid copolymer, ethylene-butyl acrylate, ethylene-acrylic acid copolymer, and polyolefin elastomer.

The embodiment of the utility model provides an in, the filling layer need experience the heating when filling and melt and the solidification process, and the filling layer is under the condition that adopts above-mentioned material, and its glass transition temperature is below 0 degree centigrade for the filling layer has good toughness at low temperature. Preferably, the filling layer is made of polyurethane. If the filling layer adopts ethylene vinyl acetate or polyolefin elastomer hot melt adhesive, functional groups capable of reacting can be arranged on the branch chains in the resin chains of the adopted ethylene vinyl acetate or polyolefin elastomer hot melt adhesive, so that the filling layer can perform crosslinking reaction at a certain temperature, the requirement of high-temperature application of the roof is met, and creep deformation is prevented.

Optionally, referring to fig. 6, fig. 6 shows a schematic structural diagram of an insulating layer in an embodiment of the present invention, where the insulating layer 22 includes: two modified layers and a core layer disposed between the two modified layers; the material of the modified layer comprises: any one of a polyester material, a polyurethane material, and an acrylate material; the core layer comprises the following materials: any one of polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate, wherein the thickness of the modification layer is 2 to 20 micrometers, and the thickness of the core layer is 100 to 500 micrometers.

The embodiment of the utility model provides an in, the insulating layer is the polyester material layer that has the ABA structure, and wherein the A layer is modified layer promptly, has higher viscidity, can improve with the firm degree of bonding between the adjacent filling layer, reduces and breaks away from the probability, and the B layer is core insulating layer, plays the insulating effect of preferred.

Alternatively, referring to fig. 7, fig. 7 shows a schematic structural diagram of an encapsulation layer in an embodiment of the present invention, and a material of the encapsulation layer 40 includes any one of polydimethylsiloxane, ethylene-vinyl acetate copolymer, polyolefin elastomer, polyurethane, polydimethylsiloxane, polyvinyl butyral, and ionomer.

The embodiment of the utility model provides an in, the preferred polydimethylsiloxane of encapsulated layer, when preparing photovoltaic roof spare, can adopt the catalyst to realize fast curing, also can adopt the initiation of additional ultraviolet ray to carry out fast curing.

Alternatively, referring to fig. 8 and fig. 8, which are schematic structural diagrams of a battery piece in an embodiment of the present invention, the battery piece 30 may be a battery piece capable of generating power on two sides.

In the embodiment of the present invention, the battery pieces may adopt a slicing technique, a whole battery piece is cut into N pieces (N is greater than or equal to 2), the battery pieces connect the positive electrode with the negative electrode of the adjacent battery piece through the interconnection bar to form a battery string, a string of battery pieces contains more than 2 battery pieces, and the space between the battery pieces is 1-5 mm; the battery strings are connected with the battery strings through the bus bars, power generation battery blocks are formed according to certain circuit requirements, one power generation battery block comprises more than 2 battery strings, the string spacing is larger than or equal to 0.5mm, the power generation batteries can be connected with the junction box through the bus bars, and therefore generated current is led out to external equipment.

To sum up, in the embodiment of the utility model provides an in, the lower lug groove that lower lug formed has increased the bonding area between the storage tank of filling layer and photovoltaic metal backplate to improve the bonding strength between filling layer and the storage tank, reduced the probability that filling layer and holding break away from, thereby reduce the probability that the photovoltaic module who installs in photovoltaic metal backplate breaks away from, improved the steadiness of photovoltaic roof spare. In addition, because the terminal box is installed in the apron and is kept away from the one side of the tank bottom portion of storage tank, if the terminal box breaks down, then can be under the condition of not dismantling photovoltaic roof spare, maintain the junction box, the maintenance process is quick, convenient.

The embodiment of the utility model provides a roofing structure, the one side of photovoltaic metal backplate 10 in the photovoltaic roof spare can bear battery piece 30 and apron 50, and the another side of photovoltaic metal backplate 10 can be installed on room purlin, and a plurality of photovoltaic metal backplates 10 splice each other and can form BIPV roofing structure, and battery piece 30 and apron 50 play the effect of covering roof and photovoltaic power generation. Specifically, on the basis that the cover plate 50 shields the wind and rain, the solar energy can be converted into the electric energy and supplied to the use through the battery piece 30, the battery piece 30 can be arranged inside the packaging layer 40 with high light transmittance, and the packaging layer 40 can realize the protection effect on the battery piece 30.

Referring to fig. 9, fig. 9 shows a schematic structural diagram of a roofing structure in an embodiment of the present invention, the roofing structure includes a plurality of photovoltaic roofing elements, an end fixing element 70, and a first connecting element 80 and a second connecting element 90.

The adjacent photovoltaic roof parts are connected through a first connecting piece 80 and a second connecting piece 90, and the photovoltaic roof parts at the end parts are connected with the roof through end fixing pieces 70.

Specifically, the first connecting piece 80 and the second connecting piece 90 are both of an i-shaped structure, first connecting grooves are formed in two sides of the first connecting piece 80, and upper lugs in the photovoltaic metal back plates are matched with the first connecting grooves of the first connecting piece 80, so that one first connecting groove on one side of the first connecting piece 80 can be clamped with the upper lug of one photovoltaic metal back plate, and one first connecting groove on the other side of the first connecting piece 80 can be clamped with the upper lug of the adjacent photovoltaic metal back plate; the two sides of the second connecting piece 90 are provided with second connecting grooves, and the lower lugs in the photovoltaic metal back plates are matched with the second connecting grooves of the second connecting piece 90, so that one second connecting groove on one side of the second connecting piece 90 can be clamped with the lower lugs of one photovoltaic metal back plate, and the second connecting groove on the other side of the second connecting piece 90 can be clamped with the lower lugs of the adjacent photovoltaic metal back plates, so that the connection between the adjacent photovoltaic roof parts is realized.

Optionally, the positions of the first connecting piece and the second connecting piece contacting the photovoltaic metal back plate, that is, the inner groove walls of the first connecting groove and the second connecting groove, may be provided with buffer layers, so as to implement buffer protection of the first connecting piece, the second connecting piece and the photovoltaic metal back plate.

Alternatively, referring to fig. 10, fig. 10 shows a schematic structural view of an end fixing in an embodiment of the present invention, and the end fixing 70 includes a protrusion structure 71 and an end body 72 connected to each other.

The convex structures 71 are matched with the mounting grooves of the photovoltaic metal back plates in the photovoltaic roof part, so that the end fixing piece 70 can be connected with the photovoltaic roof part by clamping the mounting grooves of the photovoltaic metal back plates and the convex structures 71; the end body 72 may be connected to the roof by any one of welding, riveting and nut connection to thereby effect connection of the end fitting to the roof.

The embodiment of the utility model provides a preparation method of roofing structure is still provided for prepare above-mentioned roofing structure, this method can include following step:

(1) and carrying out molding treatment on the metal substrate.

In the embodiment of the present invention, the metal substrate may be subjected to a forming process to obtain the photovoltaic metal back plate as shown in fig. 2, the photovoltaic metal back plate includes a containing groove formed by the groove bottom and the two side wall portions and used for containing the cover plate and the battery piece, and the outer side of the side wall portion is formed with the upper lug and the lower lug, the upper lug, the side wall portion and the lower lug constitute a mounting groove, and the mounting groove extends along the extending direction of the containing groove.

(2) Melting and filling a filling material into the bottom of the containing groove of the photovoltaic metal back plate.

In this step, after the molded photovoltaic metal back plate is obtained, the filling material may be heated, melted and uniformly coated on the bottom of the accommodating groove.

(3) An insulating material is tiled over the fill material.

(4) A quantity of encapsulating material is added over the insulating material.

(5) The cell pieces are laid flat over a quantity of encapsulant material.

(6) And adding another certain amount of packaging material above the battery piece, so that the packaging material wraps the battery piece.

(7) And placing the cover plate above the packaging material, and enabling the bus bar with one end connected with the battery piece to penetrate out of the through hole of the cover plate.

(8) And (3) placing the assembly prepared in the step in an environment with the temperature of 65 ℃ and the humidity of 50%, and carrying out ultraviolet curing for 1-2 minutes to obtain the photovoltaic roof piece with the filling layer, the insulating layer, the battery piece, the packaging layer and the cover plate arranged in the accommodating groove of the photovoltaic metal back plate.

(9) And mounting a junction box on one surface of the cover plate of the photovoltaic roof part prepared in the step, which is far away from the bottom of the groove, and connecting one end of the bus bar with the junction box.

(10) The splicing of the photovoltaic roof parts is realized by using the first connecting piece 80 and the second connecting piece 90 as shown in fig. 9, and the adjacent photovoltaic roof parts are directly connected. And the photovoltaic roof pieces at the end portions are connected with the roof by the end fixing members 70, so that a plurality of photovoltaic roof pieces are fixed on the roof to obtain the roof structure.

To sum up, in the embodiment of the utility model provides an in, the lower lug groove that lower lug formed has increased the bonding area between the storage tank of filling layer and photovoltaic metal backplate to improve the bonding strength between filling layer and the storage tank, reduced the probability that filling layer and storage tank break away from, thereby reduce the probability that the photovoltaic module who installs in photovoltaic metal backplate breaks away from, improved the steadiness of photovoltaic roof spare. In addition, because the terminal box is installed in the apron and is kept away from the one side of the tank bottom portion of storage tank, if the terminal box breaks down, then can be under the condition of not dismantling photovoltaic roof spare, maintain the junction box, the maintenance process is quick, convenient.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention essentially or the portions contributing to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), and includes a plurality of instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims (10)

1. A photovoltaic metal backsheet, comprising:

the battery pack comprises a groove bottom and two side wall parts, wherein the two side wall parts are respectively arranged at two sides of the groove bottom, and the groove bottom and the two side wall parts form a containing groove for containing a cover plate and a battery piece;

an upper lug and a lower lug are formed on the outer side of the side wall part, and the upper lug, the side wall part and the lower lug form a mounting groove which extends along the extending direction of the accommodating groove.

2. The photovoltaic metal backsheet according to claim 1,

the lower lug is formed by bending and folding the side, close to the groove bottom, of the side wall part outwards so as to form a lower lug groove on the side wall part, and the lower lug groove is communicated with the accommodating groove.

3. The photovoltaic metal backsheet of claim 2, wherein the upper ledge comprises a first baffle extending outwardly from the side wall portion away from the trough bottom;

the upper lug also comprises a second baffle plate which is formed by folding and extending the first baffle plate inwards, and an upper lug groove is formed between the first baffle plate and the second baffle plate.

4. The photovoltaic metal backsheet according to claim 3, wherein the second baffle extends beyond the plane of the sidewall portion.

5. The photovoltaic metal backsheet according to claim 1,

the photovoltaic metal back plate comprises an aluminum-zinc-plated steel plate, the thickness of the photovoltaic metal back plate is 0.1-1 mm, the yield strength of the photovoltaic metal back plate is 100-1000 MPa, and the gram weight of the aluminum-plated layer is 10-200 g/m.

6. The utility model provides a photovoltaic roofing spare which characterized in that, photovoltaic roofing spare includes: the photovoltaic metal backsheet, the insulating filler layer, the cover sheet, the cell sheet and the encapsulating layer of any one of claims 1 to 5;

the insulating filling layer is arranged at the bottom of the accommodating groove;

the battery piece is arranged in the packaging layer, and the packaging layer is arranged on one side of the insulating filling layer, which is far away from the bottom of the groove;

the cover plate is arranged on one side, away from the insulating filling layer, of the packaging layer.

7. The photovoltaic roofing member of claim 6,

photovoltaic roof spare still includes: a bus bar and a junction box;

the junction box is arranged on one surface of the cover plate, which is far away from the bottom of the groove;

the cover plate is provided with a through hole, the bus bar penetrates through the through hole, one end of the bus bar is connected with the battery piece, and the other end of the bus bar is connected with the junction box.

8. The photovoltaic roofing member of claim 6, wherein a side of the cover sheet facing away from the encapsulant layer is flush with a top of the photovoltaic metal backsheet.

9. A roofing structure, the roofing structure comprising: a plurality of photovoltaic roofing elements, end fittings and first and second connectors as claimed in any one of claims 6 to 8;

the photovoltaic roof parts at the end parts are connected with the roof through the end part fixing parts;

the first connecting piece and the second connecting piece are of I-shaped structures, first connecting grooves are formed in two sides of the first connecting piece, and second connecting grooves are formed in two sides of the second connecting piece;

and the upper lug in the photovoltaic metal back plate is matched with the first connecting groove of the first connecting piece, and the lower lug in the photovoltaic metal back plate is matched with the second connecting groove of the second connecting piece.

10. A roofing structure according to claim 9 wherein the end fittings include interconnecting boss structures and end bodies;

the end fixing piece is connected with the photovoltaic roof piece through clamping connection of the mounting groove and the protruding structure;

the end main body is connected with the roof in any one mode of welding, riveting and nut connection.

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