Photovoltaic tile and photovoltaic roof

Abstract

The photovoltaic tile comprises a photovoltaic main body, and a first side edge, a second side edge, a third side edge and a fourth side edge which sequentially surround the periphery of the photovoltaic main body, the first side edge upwards protrudes out of the photovoltaic main body in the vertical direction, and the third side edge downwards protrudes out of the photovoltaic main body in the vertical direction. The first side edge and the third side edge form a clamping structure extending in the vertical direction between adjacent photovoltaic tiles; the second side edge and the fourth side edge form a coplanar lap joint structure between the photovoltaic tiles extending along the same plane, the coplanar lap joint structure comprises an upper lap joint part and a lower lap joint part which are arranged along the thickness direction of the photovoltaic tiles, and the edge of the extending direction of the upper lap joint part is connected with the second side edge; and the lower lap joint part is formed on the fourth side edge or formed on one side, connected with the fourth side edge, of the photovoltaic main body. By adopting the scheme, while the connection structure between the photovoltaic tiles is simplified, the mutual shielding area between the photovoltaic tiles is effectively reduced, and the maintainability and the working efficiency of the photovoltaic tiles are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic tile technical field, especially a kind of photovoltaic tile and photovoltaic roof. BACKGROUND

[0002] Traditional block tile roof is the roof structure formed by ceramic tile, cement tile and the like, and is the mainstream of traditional roofing construction. With the pursuit of green building by people, photovoltaic roof buildings are emerging in endlessly, and with the development of science and technology, new photovoltaic roofs develop towards the direction of beautiful appearance, high temperature resistance, corrosion resistance and compliance with architectural aesthetics.

[0003] At present, the roofing system using photovoltaic tiles to completely replace traditional block tiles will greatly reduce the functions of firmness, durability, waterproofness, heat preservation, heat insulation, fire resistance and resistance to various adverse effects due to the lack of traditional block tiles in configuration, and the cost is greatly increased. When the existing photovoltaic tiles are connected to each other, the connection structure between the photovoltaic tiles is complex or the photovoltaic shading area is large. SUMMARY

[0004] Therefore, a photovoltaic tile and a photovoltaic roof are provided to solve the problems of complex connection structure between photovoltaic tiles or large mutual shading area between photovoltaic tiles in the prior art.

[0005] In one aspect, the utility model provides a kind of photovoltaic tile, and photovoltaic tile is rectangular structure, and photovoltaic tile includes photovoltaic main body and the first side edge, second side edge, third side edge and fourth side edge around photovoltaic main body, first side edge and third side edge are oppositely arranged, and second side edge and fourth side edge are oppositely arranged;

[0006] The first side edge protrudes the photovoltaic main body upwards along the vertical direction, and the third side edge protrudes the photovoltaic main body downwards along the vertical direction, and the first side edge and the third side edge form a clamping structure extending in the vertical direction between adjacent photovoltaic tiles;

[0007] The second side edge and the fourth side edge form a same-plane lapping structure extending along the same plane between photovoltaic tiles, and the same-plane lapping structure includes an upper lapping portion and a lower lapping portion arranged along the thickness direction of the photovoltaic tile;

[0008] The photovoltaic main body extends the upper lapping portion in the horizontal direction, and the edge of the upper lapping portion extending direction is connected with the second side edge;The lower lapping portion is formed on the fourth side edge or on the side connected with the fourth side edge of the photovoltaic main body.

[0009] Based on the above technical solution, the utility model can also be improved as follows.

[0010] In one of the implementation manners, a battery string is laid on the upper part of the photovoltaic main body, and the battery string extends to the upper lapping portion.

[0011] In one implementation, the photovoltaic body comprises:

[0012] The photovoltaic laminate is used to fix the cell string, and is located on the top surface of the photovoltaic body.

[0013] The building component is fixed on the bottom surface of the photovoltaic laminate, and the first, second, third and fourth side edges are respectively fixed on the four sides of the building component.

[0014] In one implementation, the building component further comprises:

[0015] The corner slot is opened on the building component, and is located below the upper lap joint and used for the extension of the lower lap joint of the adjacent photovoltaic tile.

[0016] In one implementation, the photovoltaic body further comprises:

[0017] The junction box is bonded with the photovoltaic laminate.

[0018] The building component comprises:

[0019] The wiring slot is used to install the wire of the junction box.

[0020] The installation slot is used to accommodate the junction box.

[0021] In one implementation, the wiring slot is opened on the side of the building component away from the photovoltaic laminate; the wiring slot penetrates the building component in the transverse direction and / or longitudinal direction.

[0022] In one implementation, the wiring slot is arranged in a cross shape and penetrates the building component in the transverse direction and longitudinal direction at the same time, and the wiring slots in the transverse direction and longitudinal direction are respectively coincident with the middle line of the building component in the corresponding direction.

[0023] In one implementation, the lower lap joint is formed on the fourth side edge, and the fourth side edge and the upper lap joint of the adjacent photovoltaic tile form a cooperative planar lap joint structure.

[0024] In one implementation, the fourth side edge is in a U shape, and the two vertical side edges of the U shape are not equal in height, wherein the higher side edge is fixed on the photovoltaic body, and the lower side edge extends transversely out of the photovoltaic body and forms the lower lap joint, and a drainage structure is formed in the U-shaped slot of the fourth side edge.

[0025] In one implementation, the first, second, third and fourth side edges are fixed on the photovoltaic body through a threaded structure, and the first, second and third side edges are in a plate shape.

[0026] In another aspect, the utility model provides a photovoltaic roof still, including a plurality of photovoltaic tile, the first side and the third side form the joint structure that extends in vertical direction through first side and third side between adjacent photovoltaic tile, the same plane overlap structure is formed through upper overlap part and lower overlap part between adjacent photovoltaic tile.

[0027] In one implementation, the photovoltaic roof further comprises:

[0028] The clamp is used for fixing the photovoltaic tile on the top of the photovoltaic roof, one end of the clamp has a reverse U-shaped hook part, and the hook part is used for clamping the first side; the other end of the clamp extends in a direction away from the photovoltaic tile and serves as a mounting portion, and a mounting bolt is connected to the mounting portion.

[0029] The utility model discloses the beneficial effects are: through the photovoltaic tile is divided into photovoltaic main part and surrounds the first side, the second side, the third side and the fourth side in photovoltaic main part four around, make the structure distribution of photovoltaic tile be more reasonable, reduce the complexity degree of photovoltaic main part structure, also facilitate the laying of the cell string on photovoltaic main part;Because the first side and the third side are oppositely arranged, so when laying the photovoltaic tile, the first side and the third side of adjacent photovoltaic tile are arranged adjacent, through the structure that the first side and the third side protrude in the opposite direction along the photovoltaic main part, make the first side and the third side of adjacent photovoltaic tile can be clamped and can form the structure that the continuous connection of photovoltaic tile in this direction, because the first side and the third side are the joint structure that forms along the vertical direction and at the end of photovoltaic tile, so the joint structure is as the connecting structure in the vertical direction when the photovoltaic tile extends and lays on the roof;Because the second side and the fourth side form the same plane overlap structure that extends along the same direction, so the same plane overlap structure can be as the connecting structure that the photovoltaic tile extends in the horizontal direction;In addition, because the first side and the third side are all arranged at the edge of photovoltaic main part, and the joint structure formed by the first side and the third side is relatively simple, the area of the edge of photovoltaic tile that is covered by each other is small, thereby the working area on the photovoltaic tile can accept more sunlight in this direction, and the working area on the photovoltaic tile is improved;For the structure connected by the same plane overlap structure, because the upper overlap part is part of the photovoltaic main part and the cell string extends to the upper overlap part, the area that cannot be operated due to mutual shielding when the photovoltaic tile extends in this direction is effectively reduced, thereby the laying area of the cell string on the photovoltaic tile is effectively increased;In summary, the structure that the laying area of the cell string on the photovoltaic tile is increased in two directions, is favorable to the improvement of the overall photovoltaic filling rate, thereby the front light receiving area is improved after the continuous laying of the photovoltaic tile;The application simplifies the connecting mode between the photovoltaic tiles, thereby the single photovoltaic tile is convenient to disassemble, the maintainability of the photovoltaic tile is improved, and the maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the structural schematic diagram of the photovoltaic tile in one embodiment.

[0031] Figure 2 A partial structural schematic view of a photovoltaic tile in one embodiment;

[0032] Figure 3 A structural schematic view of a building component in one embodiment;

[0033] Figure 4 A side view of one direction of a photovoltaic tile in one embodiment;

[0034] Figure 5 A side view of another direction of a photovoltaic tile in one embodiment;

[0035] Figure 6 An exploded view of a photovoltaic tile in one embodiment;

[0036] Figure 7 A structural schematic view of a photovoltaic roof in one embodiment;

[0037] Figure 8 A side view of a photovoltaic roof in one embodiment;

[0038] Figure 9 A structural schematic view of a fixing structure of a photovoltaic tile on a roof in one embodiment.

[0039] In the drawings, components represented by reference numerals are as follows:

[0040] 10, first side edge; 20, second side edge; 30, third side edge; 40, fourth side edge;

[0041] 50, photovoltaic laminate;

[0042] 60, building component; 61, corner groove; 62, wiring groove;

[0043] 70, clamp; 71, hook portion; 72, mounting portion;

[0044] 80, mounting bolt. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0046] It should be noted that the diagrams provided in the embodiments only schematically illustrate the basic concept of the present application, and thus only show the components related to the present application in the diagrams, not the components in the actual implementation, shapes, sizes and numbers. The shapes, numbers and proportions of the components in the actual implementation can be changed arbitrarily, and the layout of the components can be more complex.

[0047] A photovoltaic tile, see Figure 1 、 Figure 2 and Figure 6 The photovoltaic tile is in a rectangular structure, and comprises a photovoltaic body and a first side edge 10, a second side edge 20, a third side edge 30 and a fourth side edge 40 surrounding the photovoltaic body, the first side edge 10 and the third side edge 30 are oppositely arranged, and the second side edge 20 and the fourth side edge 40 are oppositely arranged; see Figure 4 The first side edge 10 protrudes upwardly along a vertical direction from the photovoltaic body, the third side edge 30 protrudes downwardly along a vertical direction from the photovoltaic body, and the first side edge 10 and the third side edge 30 form a clamping structure extending in a vertical direction between adjacent photovoltaic tiles; the second side edge 20 and the fourth side edge 40 form a same-plane lapping structure extending in a same plane between the photovoltaic tiles, and the same-plane lapping structure comprises an upper lapping portion and a lower lapping portion arranged along a thickness direction of the photovoltaic tile; see Figure 5 The photovoltaic body extends outwardly in a horizontal direction with the upper lapping portion, and an edge of the upper lapping portion extending direction is connected with the second side edge 20; the lower lapping portion is formed on the fourth side edge 40 or on a side of the photovoltaic body connected with the fourth side edge 40.

[0048] By adopting the above technical scheme, the photovoltaic tile is divided into the photovoltaic body and the first side edge 10, the second side edge 20, the third side edge 30 and the fourth side edge 40 surrounding the photovoltaic body, so that the structure distribution of the photovoltaic tile is more reasonable, the complexity of the photovoltaic body structure is reduced, and the laying of the cell string on the photovoltaic body is facilitated; since the first side edge 10 and the third side edge 30 are oppositely arranged, when the photovoltaic tile is laid, the first side edge 10 and the third side edge 30 of adjacent photovoltaic tiles are oppositely arranged, and through the structure that the first side edge 10 and the third side edge 30 protrude in opposite directions along the photovoltaic body, the first side edge 10 and the third side edge 30 of adjacent photovoltaic tiles can be clamped and can form a structure of continuous connection in the direction between the photovoltaic tiles; since the first side edge 10 and the third side edge 30 are clamping structures formed in a vertical direction and at the end of the photovoltaic tile, the clamping structure serves as a connection structure in a vertical direction when the photovoltaic tile is laid on a roof; since the second side edge 20 and the fourth side edge 40 form a same-plane lapping structure extending in a same direction, the same-plane lapping structure can serve as a connection structure extending in a transverse direction between the photovoltaic tiles;

[0049] In addition, since the first side edge 10 and the third side edge 30 are arranged at the edges of the photovoltaic body, and the clamping structure formed by the first side edge 10 and the third side edge 30 is relatively simple, the area of the photovoltaic tile vertical connection edge covered by each other is small, thereby increasing the area of the photovoltaic tile in this direction that can be irradiated by sunlight, and increasing the working area on the photovoltaic tile; for the structure connected by the same plane lap joint structure, since the upper lap joint part is part of the photovoltaic body, the cell string can extend to the upper lap joint part, thereby effectively increasing the laying area of the cell string on the photovoltaic tile; in summary, the structure that increases the laying area ratio of the cell string on the photovoltaic tile in two directions is beneficial to the improvement of the overall photovoltaic filling rate, thereby being beneficial to the increase of the front light receiving area after the continuous laying of the photovoltaic tile; since the connection mode between the photovoltaic tiles is simplified, the disassembly of the single photovoltaic tile is facilitated, the maintainability of the photovoltaic tile is improved, and the maintenance cost is reduced.

[0050] Specifically, for the lower lap joint part, since the lower lap joint part is located below the same plane lap joint structure, and the upper lap joint part is located above the same plane lap joint structure and has a cell string at the top, the lower lap joint part does not bear the function of receiving light, so that the lower lap joint part can be formed only by the fourth side edge 40, or the lower lap joint part is formed only by the extension of the photovoltaic body, or the lower lap joint part can be formed by the fourth side edge 40 and the extension of the photovoltaic body.

[0051] In some embodiments of the present application, the cell string is laid on the upper part of the photovoltaic body and extends to the upper lap joint part. In this way, for the structure connected by the same plane lap joint structure, since the upper lap joint part is part of the photovoltaic body and the cell string extends to the upper lap joint part, the area of the photovoltaic tile that cannot be used due to mutual shielding when the photovoltaic tile extends in this direction is effectively reduced, thereby effectively increasing the laying area of the cell string on the photovoltaic tile.

[0052] In some embodiments of the present application, referring to Figure 6 , the photovoltaic body includes a photovoltaic laminate 50 and a building component 60, the photovoltaic laminate 50 is used to fix the cell string, and the photovoltaic laminate 50 is located at the top surface of the photovoltaic body; the building component 60 is fixed at the bottom surface of the photovoltaic laminate 50, and the first side edge 10, the second side edge 20, the third side edge 30 and the fourth side edge 40 are respectively fixed at the four peripheries of the building component 60. In this way, the building component 60 is arranged to form the base structure of the photovoltaic tile to increase the strength, the photovoltaic laminate 50 is fixed and attached to the building component 60, and the connection mode of the photovoltaic laminate 50 and the building component 60 can be sealing glue or other modes; the first side edge 10, the second side edge 20, the third side edge 30 and the fourth side edge 40 are fixed at the four peripheries of the building component 60, so that the four side edges have sufficient strength after being connected.

[0053] In the embodiment, the photovoltaic laminate 50 includes a panel, a cell string, a back plate and a sealing material, and the cell string is adhered together with the panel and the back plate by the sealing material.

[0054] In some embodiments of the present application, referring to Figure 3 , the building component 60 further comprises a corner groove 61, which is formed on the building component 60 and is located below the upper lap joint and used for the extension of the lower lap joint of the adjacent photovoltaic tile. In this way, by providing the corner groove 61, the corner groove 61 serves as a groove-shaped structure arranged at the edge and used for accommodating the lower lap joint, and the upper lap joint is above the corner groove 61, so that the upper lap joint and the lower lap joint form a coplanar lap joint structure.

[0055] In some embodiments of the present application, referring to Figure 3 , the photovoltaic body further comprises a junction box, which is bonded with the photovoltaic laminate 50; and the building component 60 comprises a junction groove 62 and a mounting groove, the junction groove 62 is used for mounting the wire of the junction box, and the mounting groove is used for accommodating the junction box. In this way, by providing the junction groove 62 and the mounting groove on the building component 60, the wire of the junction box is laid through the junction groove 62, and the junction box is accommodated through the mounting groove.

[0056] In the embodiment, the junction box can be connected with the photovoltaic laminate 50 which has been laminated by bonding, and then the photovoltaic laminate 50 with the junction box is attached to the building component 60. The manufacturing process of the photovoltaic laminate 50 comprises: welding the cell sheet, connecting the cell sheets in series, then stacking the sealing material, the panel and the back plate, and then laminating.

[0057] In some embodiments of the present application, referring to Figure 3 , the junction groove 62 is formed on the side of the building component 60 which is away from the photovoltaic laminate 50; and the junction groove 62 penetrates the building component 60 in the transverse direction and / or the longitudinal direction. In this way, by penetrating the building component 60 in the transverse direction or the longitudinal direction, or by penetrating the building component 60 in both the transverse direction and the longitudinal direction, the connection and penetration of the junction groove 62 between adjacent photovoltaic tiles are facilitated, and a continuous junction groove 62 for wire installation is formed.

[0058] In some embodiments, referring to Figure 3 , the junction groove 62 is arranged in a cross shape and penetrates the building component 60 in both the transverse direction and the longitudinal direction, and the junction groove 62 in the transverse direction and the junction groove 62 in the longitudinal direction are respectively coincident with the middle line of the building component 60 in the corresponding direction. In this way, by arranging the junction groove 62 in the transverse direction and the junction groove 62 in the longitudinal direction at the middle line of the corresponding position, the symmetry of the photovoltaic body is improved, and the processing of the photovoltaic body is facilitated.

[0059] In some embodiments of the present application, referring to Figure 1 and Figure 5The lower lap joint is arranged on the fourth side edge 40, and the fourth side edge 40 and the upper lap joint of the adjacent photovoltaic tile form a flush lap joint structure. In this way, the lower lap joint is arranged on the fourth side edge 40, so that the complexity of the photovoltaic main structure is simplified, and the photovoltaic main structure is facilitated to be simplified.

[0060] In some embodiments of the present application, referring to Figure 1 and Figure 2 The fourth side edge 40 is U-shaped, and the two vertical side edges of the U-shaped structure are not of the same height, wherein the higher side edge is fixed on the photovoltaic main body, and the lower side edge extends transversely out of the photovoltaic main body and forms the lower lap joint; and a drainage structure is arranged in the U-shaped groove of the fourth side edge 40. In this way, the fourth side edge 40 is U-shaped, and the U-shaped structure facilitates the fixing of the fourth side edge 40 on the photovoltaic main body, and facilitates the extension of one end of the U-shaped fourth side edge 40 and the formation of the lower lap joint. In addition, due to the hollow U-shaped structure of the fourth side edge 40, the drainage structure is arranged in the U-shaped groove, which facilitates the drainage of the photovoltaic tile, thereby avoiding the accumulation of water after the photovoltaic tile is laid, and facilitating the drainage of the water.

[0061] Specifically, the bottom of the U-shaped fourth side edge 40 is a flat surface parallel to the bottom surface of the photovoltaic main body.

[0062] In some embodiments, referring to Figure 6 The first side edge 10, the second side edge 20, the third side edge 30 and the fourth side edge 40 are all fixed on the photovoltaic main body through a threaded structure, and the first side edge 10, the second side edge 20 and the third side edge 30 are all plate-shaped structures. In this way, the first side edge 10, the second side edge 20, the third side edge 30 and the fourth side edge 40 are respectively fixed on the photovoltaic main body through bolts, so as to improve the stability of the four side edges after being fixed. Based on the structural characteristics of the first side edge 10, the second side edge 20 and the third side edge 30, the first side edge 10, the second side edge 20 and the third side edge 30 can all be arranged as plate-shaped structures, which effectively reduces the structural complexity of the three side edges and is conducive to cost reduction.

[0063] In the embodiments, the first side edge 10, the second side edge 20, the third side edge 30 and the fourth side edge 40 are all fixed on the building component 60 through bolts.

[0064] A photovoltaic roof, referring to Figure 7 and Figure 8 includes a plurality of photovoltaic tiles, and the first side edge 10 and the third side edge 30 form a vertically extending clamping structure between adjacent photovoltaic tiles, and the upper lap joint and the lower lap joint form a flush lap joint structure between adjacent photovoltaic tiles.

[0065] In some embodiments of the present application, referring to Figure 9The photovoltaic roof further comprises a clamp 70 for fixing the photovoltaic tiles on the top of the photovoltaic roof, one end of the clamp 70 is provided with a reverse U-shaped hook portion 71 for clamping the first side edge 10, and the other end of the clamp 70 extends in a direction away from the photovoltaic tile and serves as a mounting portion 72, and a mounting bolt 80 is connected to the mounting portion 72.

[0066] With the scheme, referring to Figure 7 and Figure 8 , the photovoltaic roof is formed by continuously arranging a plurality of photovoltaic tiles, in the arrangement of the rectangular photovoltaic tiles, the photovoltaic tiles have two mutually perpendicular extension directions, one extension direction forms a clamping structure extending along the vertical direction edge through the first side edge 10 and the third side edge 30, and the other extension direction forms a coplanar clamping structure through the upper clamping portion and the lower clamping portion, so as to realize the paving of the photovoltaic tiles; in summary, the connecting structures in the two directions enable the photovoltaic tiles to extend in two directions, thereby facilitating the paving of the photovoltaic roof; the clamp 70 is arranged on the top of the photovoltaic roof, the first side edge 10 of the photovoltaic tile on the top is fixed through the clamp 70, one side of the clamp 70 is clamped with the photovoltaic tile, and the other side of the clamp 70 is fixed in position through the bolt, so that the fixing mode of the photovoltaic tile is simplified, and the photovoltaic tile is convenient to disassemble and overhaul.

[0067] In the embodiment, referring to Figure 6 , the first side edge 10, the second side edge 20, the third side edge 30 and the fourth side edge 40 are four independent workpieces and are fixed on the building component 60 through bolts; wherein the first side edge 10, the second side edge 20, the third side edge 30 and the fourth side edge 40 are connected with the building component 60 through plane abutment, and the side surface of the building component 60 is provided with corresponding mounting holes. The four side edge protective plates can also be bonded on the four side surfaces of the building component 60 through an adhesive, and the four side edge protective plates are fixed on the building component 60 through bolts.

[0068] In the utility model, unless another definite provision and limitation, the terms "mounting", "connection", "connecting", "fixing" and the like terms should be understood in a broad sense, for example, can be fixed connection, also can be detachable connection, or be integrated; can be mechanical connection, also can be electrical connection; can be directly connected, also can be indirectly connected through an intermediate medium, can be the communication inside two elements or the interaction relationship of two elements, unless another definite limitation. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0069] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0070] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A photovoltaic tile, characterized in that, The photovoltaic tile has a rectangular structure, and comprises a photovoltaic body and a first side edge (10), a second side edge (20), a third side edge (30) and a fourth side edge (40) surrounding the photovoltaic body; the first side edge (10) and the third side edge (30) are oppositely arranged, and the second side edge (20) and the fourth side edge (40) are oppositely arranged. The first side edge (10) protrudes upward along a vertical direction from the photovoltaic body, and the third side edge (30) protrudes downward along a vertical direction from the photovoltaic body; the first side edge (10) and the third side edge (30) form a clamping structure extending in a vertical direction between adjacent photovoltaic tiles. The second side edge (20) and the fourth side edge (40) form a same-plane overlapping structure extending in a same plane between adjacent photovoltaic tiles, and the same-plane overlapping structure comprises an upper overlapping portion and a lower overlapping portion arranged along a thickness direction of the photovoltaic tile. The photovoltaic body extends outward in a horizontal direction with the upper overlapping portion, and an edge of the upper overlapping portion is connected with the second side edge (20); the lower overlapping portion is formed on the fourth side edge (40) or on a side of the photovoltaic body connected with the fourth side edge (40).

2. Photovoltaic tile according to claim 1, characterized in that, A cell string is arranged on an upper portion of the photovoltaic body, and the cell string extends to the upper overlapping portion.

3. Photovoltaic tile according to claim 1 or 2, characterized in that, The photovoltaic body comprises: a photovoltaic laminate (50) for fixing the cell string, and the photovoltaic laminate (50) is arranged on a top surface of the photovoltaic body; a building component (60) fixed on a bottom surface of the photovoltaic laminate (50), and the first side edge (10), the second side edge (20), the third side edge (30) and the fourth side edge (40) are respectively fixed around the building component (60).

4. Photovoltaic tile according to claim 3, characterized in that, The building component (60) further comprises: a corner groove (61) arranged on the building component (60) and located below the upper overlapping portion and used for the lower overlapping portion of an adjacent photovoltaic tile to extend into.

5. The photovoltaic tile of claim 3, wherein, The photovoltaic body further comprises: a junction box bonded with the photovoltaic laminate (50); the building component (60) comprises: a junction groove (62) used for arranging a wire of the junction box; a mounting groove used for accommodating the junction box.

6. Photovoltaic tile according to claim 5, characterized in that, The junction groove (62) is arranged on a side of the building component (60) facing away from the photovoltaic laminate (50); and the junction groove (62) extends through the building component (60) in a transverse direction and / or a longitudinal direction.

7. Photovoltaic tile according to claim 1 or 2, characterized in that, The lower overlapping portion is formed on the fourth side edge (40), and the fourth side edge (40) and an upper overlapping portion of an adjacent photovoltaic tile form the same-plane overlapping structure.

8. Photovoltaic tile according to claim 7, characterized in that, The fourth side edge (40) has a U shape, and two vertical side edges of the U shape are not of the same height, wherein a higher side edge is fixed on the photovoltaic body, and a lower side edge extends transversely from the photovoltaic body and forms the lower overlapping portion; and a drainage structure is arranged in a U-shaped groove of the fourth side edge (40).

9. A photovoltaic roof, characterized by The photovoltaic roof comprises a plurality of photovoltaic tiles as claimed in any one of claims 1-8, and the first side edge (10) and the third side edge (30) of adjacent photovoltaic tiles form the vertical extension clamping structure, and the upper lap joint and the lower lap joint of adjacent photovoltaic tiles form the same-plane lap joint structure.

10. A photovoltaic roof according to claim 9, characterized in that The photovoltaic roof further comprises: A clamp (70) is used to fix the photovoltaic tile at the top of the photovoltaic roof, one end of the clamp (70) has a reverse U-shaped clamping portion (71) used to clamp the first side edge (10), and the other end of the clamp (70) extends in a direction away from the photovoltaic tile and serves as a mounting portion (72), and a mounting bolt (80) is connected to the mounting portion (72).

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