CN113421938A

CN113421938A - Solar cell module, efficient laminated curved surface photovoltaic tile and preparation method thereof

Info

Publication number: CN113421938A
Application number: CN202110648387.1A
Authority: CN
Inventors: 程晓龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-09-21
Anticipated expiration: 2041-06-10
Also published as: CN113421938B

Abstract

The invention aims to provide a solar cell module, a high-efficiency laminated curved photovoltaic tile and a preparation method thereof, wherein the solar cell module comprises sliced cells, a stack structure and a bus bar, wherein the stack structure comprises two or more than two adjacent stacked cell string structures, and each row of a plurality of mutually stacked sliced cells in the stack structure form a stacked structure vertical to the serial connection direction of the cell string structures; in the laminated structure, an overlapping area is formed between two adjacent sliced batteries, an insulating strip is arranged in the overlapping area, and the bus bars are used for connecting a plurality of battery string structures in the laminated string structure in series or in parallel to form a series-parallel structure. The solar cell module can greatly reduce the arrangement gap between the sliced cells and the shielding area of the main grid welding strip, so that the arrangement area and the light receiving area of the cell pieces can be maximized simultaneously.

Description

Solar cell module, efficient laminated curved surface photovoltaic tile and preparation method thereof

Technical Field

The invention relates to the field of photovoltaic tiles, in particular to a solar cell module, a high-efficiency laminated curved surface photovoltaic tile and a preparation method thereof.

Background

The solar cell in the current curved surface photovoltaic tile adopts a flexible thin-film solar cell or a crystalline silicon solar cell is cut into small pieces, then conventional series welding is carried out to form a cell string and a cell module, and then materials such as front plate glass, an adhesive, the solar cell module and a back plate are adopted for combined packaging.

However, the prior art has the disadvantages that: when the flexible thin-film solar cell is adopted for slicing design, when a cell string is parallel to a curved surface, a large number of series welding gaps are generated by an undersized crystalline silicon sliced cell, so that the efficiency of a component is low, and the output of the component is greatly reduced due to inconsistent light receiving quality of the curved surface model, when the crystalline silicon solar cell is adopted for slicing design, when the cell string is perpendicular to the curved surface, the number of the gaps among the strings is increased, and meanwhile, the shielding area of a main grid welding strip is increased, so that the efficiency of the component is low, when the cell string is parallel to the curved surface, the cutting is smaller, more lamination positions are generated, so that the consumption of conductive adhesive is greatly increased, the CTM of the component is worse, and the output of the component is greatly reduced due to inconsistent light receiving quality of the curved surface model, when the efficient tiling design of the conductive adhesive technology is adopted, when the battery string is perpendicular to the curved surface, the existing slices need to be further subjected to smaller equal slicing in the length direction to form the narrow battery string, more cutting results in more power loss, and meanwhile, the assembly efficiency is lower due to the formed numerous inter-string gaps.

Disclosure of Invention

The invention aims to provide a solar cell module, a high-efficiency laminated curved photovoltaic tile and a preparation method thereof, and aims to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

a solar cell module comprises sliced cells, a stack structure and a bus bar, wherein the stack structure comprises two or more than two adjacent stacked cell string structures, and each row of the stacked sliced cells stacked mutually in the stack structure form a stacked structure vertical to the serial connection direction of the cell string structures; in the laminated structure, a superposition region is arranged between two adjacent sliced batteries, an insulating strip is arranged in the superposition region, and the bus bar is used for connecting a plurality of battery string structures in the laminated string structure in series or in parallel to form a series-parallel structure and connecting two electrodes of the series-parallel structure and converging the two electrodes to an output position to form a converging line structure, wherein the output position is used for being electrically connected with the connector;

the battery string structure comprises at least two slice batteries and a main grid welding strip used for serially welding the slice batteries, wherein a front main grid is arranged on one side, close to the long edge, of the front of each slice battery, the back of each slice battery is provided with a back main grid on the opposite side of the front main grid, and the two adjacent slice batteries are welded with the main grid welding strip in a mode that the front and the back of each slice battery are sequentially alternated.

The further improvement is that: the gap distance between one side edge of the front main grid and the edge of the sliced battery is 0.01mm-0.5mm, the width of the front main grid is 0.01mm-2mm, the thickness of a welding strip of the main grid is 0.05mm-0.15mm, the gap distance between one side edge of the back main grid and the long edge of the sliced battery is not more than 50% of the width dimension of the sliced battery and not less than the size of a lamination, and the width value of the back main grid is 0.01mm-8 mm.

The further improvement is that: the gap distance between the edge of one side of the back main grid close to the long edge and the edge of the long edge is 2-8 mm.

The further improvement is that: the battery string structure is connected with a plurality of bypass diodes in parallel, each bypass diode is correspondingly and electrically connected with two ends of a part of sliced batteries with corresponding quantity in the battery string structure, and the quantity of the diodes is less than or equal to that of the sliced batteries in the battery string structure.

The further improvement is that: the shape of the series connection gap area of the main grid welding strip in the length direction is flat, or circular arc, or wavy, or Z-shaped or V-shaped.

The further improvement is that: the string piece spacing between two adjacent sliced batteries in the battery string structure is 0.5mm-2 mm.

The further improvement is that: in the laminated structure, a welding area formed by the front main grid of one of the sliced cells is positioned in an overlapping area and covered and shielded by the other adjacent sliced cell, and the width of the overlapping area is 0.1mm-1 mm.

The invention also provides a high-efficiency laminated curved photovoltaic tile which comprises a front plate, a back plate and a connector, and further comprises any one of the solar cell modules adhered between the front plate and the back plate through an adhesive and a bonding agent.

The invention also provides a preparation method of the efficient laminated curved surface photovoltaic tile, which comprises the following steps:

aligning and welding the cut main grid welding strip with the front main grid of the sliced battery;

laminating two adjacent sliced batteries welded with main grid welding strips and insulating the overlapped areas of the two sliced batteries through insulating strips to form laminated connection;

sequentially aligning and bonding a plurality of laminated connected sliced batteries to form a laminated structure;

aligning the laminated structures in sequence, alternately arranging one side, close to the front main grid, of two adjacent sliced batteries at corresponding positions of the two adjacent laminated structures and one side, close to the back main grid, of the two adjacent sliced batteries, and then welding the extending end of a main grid welding strip of the sliced battery in the next laminated structure with the back main grid of the corresponding sliced battery in the previous laminated structure to form a laminated string structure;

the plurality of battery string structures in the stacked string structure are connected in series and/or in parallel through the bus bars, a series-parallel structure is formed, electrodes of the series-parallel structure are connected to an output position through the bus bars to form a bus bar outlet structure, and therefore the solar battery module is assembled.

The further improvement is that: in the connecting step of the laminated structure, two adjacent sliced batteries welded with the main grid welding strips are arranged upwards in a stacked mode to form a superposition area, the main grid on the front surface of the sliced battery located below is located in the superposition area, one side edge, close to the main grid on the back surface of the sliced battery, of the sliced battery located above is flush with the edge of the main grid on the front surface of the sliced battery located below, and the position of the double-sided adhesive tape on the insulating strip is pressed, so that the two laminated sliced batteries are bonded together through the double-sided adhesive tape in the superposition area to form the laminated structure.

Compared with the prior art, the invention has the beneficial effects that:

1. compared with a common crystalline silicon solar cell module serial connection mode, the cell string structure in the design is characterized in that two adjacent sliced cells are welded with a main grid welding strip in a mode that the front surface and the back surface of the two sliced cells are sequentially alternated, so that the sliced cells positioned on the main grid welding strip are arranged in a staggered mode, a stacked string structure is formed by stacking a plurality of cell string structures, and each row of the plurality of the sliced cells stacked mutually in the stacked string structure form a stacked structure perpendicular to the serial connection direction of the cell string structure, so that a solar cell module can greatly reduce the arrangement gaps among the sliced cells and the shielding area of the main grid welding strip, further the arrangement area and the light receiving area of the cell pieces are simultaneously maximized, and the more stable module output and higher module efficiency of the curved photovoltaic tile are realized;

2. compared with a solar laminated tile serial connection mode of a conductive adhesive technology, the sliced cells are connected through transverse double-sided staggered series welding and are combined with the laminated structure vertical to the cell string structure, so that the arrangement gaps among the cell string structures are eliminated, the number of the slices is reduced, balance of low cost and high performance is realized, and the product competitiveness of the curved surface photovoltaic tile is further improved.

Drawings

FIG. 1 is a schematic structural view of a high efficiency laminated curved photovoltaic tile;

FIG. 2 is a schematic view of the front plate contouring;

FIG. 3 is a schematic structural diagram of a solar cell module;

FIG. 4 is a schematic front view of a sliced cell;

FIG. 5 is a schematic rear view of a sliced cell;

FIG. 6 is a schematic diagram of a battery string configuration;

FIG. 7 is a schematic view of a stacked structure;

FIG. 8 is a schematic diagram of a stacked string structure;

FIG. 9 is a schematic diagram of a parallel structure of a plurality of battery strings in a stacked string structure

FIG. 10 is a schematic diagram of a structure in which a plurality of battery strings are connected in series after being connected in parallel in a stacked string structure;

in the figure: a solar cell module 1;

adhesives

21, 22; a front plate 3; a back plate 4; a connector 5; a tandem structure 10; a battery string structure 11; a sliced battery 100; a main grid solder strip 110; a front main grid 1001; a back side main gate 1002; a laminated structure 12; an insulating strip 120; a series-parallel structure 13; a bus bar 130; the

electrodes

131, 132; a bus line structure 14; output position 140.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, in an embodiment of the present invention, a high-efficiency laminated curved photovoltaic tile includes a front plate 3, an adhesive 21, a solar cell module 1, an adhesive 22, a back plate 4, and a connector 5.

The front plate 3 includes a light receiving surface and a backlight surface, and has excellent light transmittance. In use, sunlight passes through the front plate 3 and reaches the solar cell module 1. In some embodiments, the front plate 3 is a material with high water vapor barrier property and excellent weather resistance, such as a polymer composite film or glass, preferably tempered glass, and more preferably ultra-white tempered glass, and may also be a polymer material, such as a glass fiber reinforced plastic composite material/PC/PMMA/PVC, and the like, although not limited thereto. As shown in fig. 2: the invention is suitable for various special-shaped curved surface shapes, wherein the front plate 3 can be in an arc shape, a wave shape, a flat curved shape or the like,

the adhesive 21 and the adhesive 22 are made of a high weather-resistant polymer material. It is used to bond the front plate 3, the solar cell module 1, and the back plate 4, and fill the gap between the two layers to form a reliable internal structure, and ethylene-vinyl acetate copolymer (EVA), Polyolefin elastomer (POE), polyvinyl butyral (PVB), or 2, 4, 6-trimethylbenzoyl diphenyl phosphine oxide (TP0, 2, 4, 6-trimethylphenyldiphenyl phosphine oxide) may be used, and the Polyolefin elastomer (POE) is preferably a high polymer of ethylene and butene or a high polymer of ethylene and octene, but not limited thereto.

Referring to fig. 3, the solar cell module 1 is a core power generation portion, and includes a string stack structure 10 formed of solar sliced cells 100 and a bus bar 130.

Referring to fig. 4 and 5, the sliced battery 100 according to the present invention is obtained by cutting a solar cell with a standard specification, and the cell can be cut equally in different numbers according to the curvature radius of different curved surfaces. The sliced cell can be a one-half slice, a one-third slice, a one-fourth slice, a one-fifth slice, a one-sixth slice, or a one-tenth slice cell, and can be other sizes of sliced cells. The solar cell used may be a polycrystalline silicon solar cell, a single crystalline silicon solar cell, an HIT heterojunction solar cell, and/or the like. A front main grid 1001 is arranged at a position of the front of the sliced battery 100 close to the long edge of one side, wherein the gap distance between the edge of one side of the front main grid 1001 close to the long edge and the edge of the long edge of the sliced battery 100 is preferably 0.01mm-0.5 mm. The front main grid 1001 has a width value of 0.01mm to 2mm, preferably 0.1mm to 1.0 mm. A back main grid 1002 is arranged at a position of the back of the sliced battery 100 close to the long edge of the other side, wherein the gap distance between the edge of one side of the back main grid 1002 close to the long edge and the edge of the long edge of the sliced battery 100 is not more than 50% of the width dimension of the sliced battery 100 and not less than the lamination dimension, and preferably 2mm-8 mm. The width value of the back main grid 1002 is 0.01mm-8mm, preferably 0.1mm-5 mm.

The main grid welding strip 110 is made of a tinned copper strip or a flexible circuit board, so that the main grid welding strip has certain flexibility, and the thickness of the main grid welding strip is 0.02mm-0.5mm, preferably 0.05mm-0.15 mm. The width of the main grid welding strip 110 is determined according to the current passing capability of the sliced battery, and generally may be 0.1mm to 10mm, and preferably 0.3mm to 5 mm. The length of the main grid solder strip 110 is not less than the length of the sliced battery, and the serial connection requirement of the sliced battery 100 is satisfied, which is not limited in the present design. The series gap area of the main grid welding strip 110 in the length direction is flat, arc, wave, zigzag, V-shaped, etc.

Referring to fig. 6, two or more sliced batteries 100 are welded through main grid solder strips 110 in a front and back alternating fashion in order to form a battery string structure 11. When welding, the front main grid 1001 of the previous sliced battery 100 and the back main grid 1002 of the next sliced battery 100 are welded through the main grid welding strip 110, and the string sheet gap between two adjacent sliced batteries 100 is 0.01mm-5mm, preferably 0.5mm-2 mm. Wherein the main grid solder strip 110 is flush with the front side main grid 1001 of the sliced battery 100 along the length of the sliced battery 100. The main grid solder strip 110 soldered to the main grid 1001 on the front surface of the sliced battery 100 has one end flush with the sliced battery 100. In the battery string structure 11, two adjacent sliced batteries 100 may be arranged in a staggered manner and form an included angle.

Further, a plurality of bypass diodes are connected in parallel to the battery string structure 11, and each bypass diode is electrically connected to two ends of a corresponding number of partially-sliced batteries 100 in the battery string structure 11. This number is equal to or less than the number of sliced batteries 100 of the battery string structure 11.

Referring to fig. 7 and 8, the stack string structure 10 includes two or more cell string structures 11 disposed adjacent to each other. And the plurality of sliced batteries 100 stacked on each other in each column in the stacked string structure 10 form a stacked structure 12 perpendicular to the serial connection direction of the battery string structure 11; in the laminated structure 12, an overlapping area is formed between two adjacent sliced batteries 100, in the laminated structure 12, a welding area formed by a front main grid of one sliced battery 100 is located in the overlapping area and is covered and shielded by another adjacent sliced battery 100, and the width of the overlapping area is 0.1mm-1 mm. The width of the overlapping area is not more than 2mm, and preferably 0.1mm-1 mm.

The insulating strips 120 are distributed in the overlapping regions of the stacked structures 12, and are used for electrically insulating the sliced batteries 100 in the adjacent battery string structures 11 in the overlapping regions of the stacked structures. The insulating strip 120 may be double-sided tape or foam tape with adhesive coated on both sides, wherein the adhesive may be acrylic, silicone, or the like. The insulating strip 120 may also be an insulating coating or plating structure attached to the overlapping area of the back side of the diced cell 100 or the front side of the main grid solder strip 110. The plurality of cell string structures 11 of the stacked string structure 10 are welded by the bus bars 130 and form the series-parallel structure 13, so as to realize the series or parallel electrical connection structure. May be all parallel configuration as shown in fig. 9; or a structure in which parts are connected in parallel and then connected in series is also possible, as shown in fig. 10.

The series-parallel structure 13 is to integrate the output maximization of the curved photovoltaic tile under various sunlight irradiation conditions, and the two structures can be combined again according to different product forms, so that the series-parallel structure is not limited to the two structures.

The two

electrodes

131 and 132 of the series-parallel structure are respectively welded to the bus bar 130, and are collected to a designed output position 140 through the bus bar 130 to form the bus bar line structure 14. The bus bar 130 is made of a tinned copper strip or other conductive metal materials, and can also be a conductive adhesive tape.

The back plate 4 is used as the outermost layer structure of the back, can be strengthened float glass, can also be a glass fiber organic composite material/high polymer material such as PC/PMMA/PVC and the like, has good weather resistance, and effectively ensures the service life of the assembly, but is not limited thereto.

The connector 5 is the core component of the electrical output of the photovoltaic tile. The waterproof grade meets the requirement of IP67, and the connection is reliable.

The embodiment also provides a preparation method of the efficient laminated curved photovoltaic tile, which comprises the following steps:

1) the main grid solder strip 110 is picked up and cut to the design length.

2) And placing the cut main grid welding strip 110 at the position flush with the front main grid 1001 of the sliced battery 100, and welding to form the sliced battery 100 with the main grid welding strip 110 welded on the front main grid 1001.

3) The stacked region of the diced cell 100 with the main grid solder ribbon 110 soldered to the front main grid 1001 is subjected to an insulation treatment. When the double-sided tape is used, the insulating tape 120 is attached to the lamination overlapping region on the main grid welding tape 110 or the lamination overlapping region on the back surface of the diced battery 100. If the main grid welding strip 110 or the sliced battery 100 has an insulating structure in the area, the double-sided adhesive tape does not need to be adhered to the whole area, and only the double-sided adhesive tape needs to be adhered to any two points of the area.

4) The diced cells 100 with the main grid solder strips 110 soldered to the front main grid 1001 are placed right side up in the lamination work area.

5) The sliced battery 100 welded with the main grid welding strip 110 on the next front main grid 1001 is overlapped on the sliced battery 100 welded with the main grid welding strip 110 on the last front main grid 1001 with the front main grid 1001 facing upwards, the front main grid 1001 is covered, the edge of one side, close to the back main grid 1002, of the sliced battery 100 welded with the main grid welding strip 110 on the next front main grid 1001 is flush with the edge of the front main grid 100 welded with the main grid welding strip 110 on the last front main grid 1001, the position of the double-sided adhesive tape 1001 is pressed, the sliced batteries 100 welded with the main grid welding strip 110 on the two overlapped front main grids 1001 are adhered together through the double-sided adhesive tape in the overlapping area, and reliable overlapping connection is formed.

6) Step 5 is repeated until the desired set of laminations 12 is completed.

7) The completed stack 12 is placed face down in the layup area.

8) And (3) placing the next laminated structure 12 with the front side facing downwards at the tandem position of the previous laminated structure 12 in the arrangement area according to the arrangement gap, enabling the extending end of the main grid welding strip 110 of the sliced cell 100 of the laminated structure 12 to be superposed with and welded to the back main grid 1002 of the sliced cell 100 of the previous laminated structure 12, and sequentially welding the main grid welding strips 110 of other sliced cells 100 of the laminated structure 12 to the back main grid 1002 of the sliced cell 100 of the previous laminated structure 12 corresponding to the main grid 110 according to the same operation to form the tandem.

9) Step 8 is repeated until the desired plurality of sets of stacked structures 12 are concatenated and form the stacked structure 10.

10) The main grid solder strip 110 is soldered to the back main grid 1002 of each of the sliced cells 100 with the back main grid 1002 thereof not soldered to the end of the main grid solder strip 110, with the tandem stack structure 10 facing downward. The main grid solder strip 110 is required to extend out of a section of the sliced battery, and serves as a terminal for performing series-parallel connection and soldering on a plurality of battery string structures 11 in the reserved stacked string structure 10.

11) According to the design, the positive and negative terminals of the plurality of battery string structures 11 in the stacked string structure 10 are welded by the bus bar 130 to realize the series-parallel structure 13, and two

electrodes

131 and 132 are formed.

12) The electrical output of the solar cell module 1 is converged to the output position 140 by the bus bar 130, and the required solar cell module 1 is completed.

13) The front sheet 3 is laid in the laying area, and the adhesive 21, the solar cell module 1, the adhesive 22, and the back sheet 4 are laid on the front sheet 3 in this order to obtain a pre-laminated assembly.

14) And placing the laid pre-laminating assembly in vacuum-pumping equipment at the feeding position of the laminating machine, sealing the vacuum-pumping equipment and performing pre-vacuum-pumping. When the vacuum degree reaches-95 KPa, keeping for 3 minutes to 10 minutes, preferably 5 minutes to 7 minutes.

15) And putting the vacuumizing equipment with the pre-laminating assembly inside into a laminating machine for vacuum hot pressing. The parameters of the laminating machine are set as follows:

the first section is 90-i 00 ℃ for 5-15 minutes;

the second stage is at 110-120 deg.c for 5-15 min;

the third section is at 135-150 deg.c for 30-60 min;

by the vacuum hot-pressing mode, the product quality can be effectively controlled, and the stability of the product manufacturing process and the production yield are improved.

16) And placing the laminated assembly together with a vacuumizing device in a cooling area, keeping vacuum cooling until the surface temperature is reduced to be below 60 ℃, and opening the vacuumizing device to take out the laminated curved photovoltaic tile assembly.

17) And trimming the curved surface photovoltaic tile assembly.

18) And (5) testing the insulation and voltage resistance of the curved surface photovoltaic tile assembly.

19) And (6) testing the performance of the curved surface photovoltaic tile assembly IV.

20) The curved photovoltaic tile is fitted with a connector 5.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. A solar cell module (1) comprising a sliced cell (100), characterized in that: the battery pack structure comprises a battery string structure (11) and a stacking belt (130), wherein the battery string structure (10) comprises two or more than two adjacent battery string structures (11) which are arranged in a stacked mode, each row of the plurality of sliced batteries (100) stacked on each other in the battery string structure (10) form a stacked structure (12) perpendicular to the serial connection direction of the battery string structures (11), an overlapping area is arranged between every two adjacent sliced batteries (100) in the stacked structure (12), and an insulating strip (120) is arranged in the overlapping area; the bus bar (130) is used for connecting a plurality of battery string structures (11) in a stacked string structure (10) in series or in parallel to form a series-parallel structure (13), and is used for connecting and merging two electrodes of the series-parallel structure (13) to an output position (140) to form a bus-out line structure (14), and the output position (140) is used for being electrically connected with the connector (5);

the battery string structure (11) comprises at least two sliced batteries (100) and a main grid welding strip (110) used for welding the sliced batteries (100) in series, wherein the front sides of the sliced batteries (100) close to one side of the long sides of the sliced batteries are provided with front main grids (1001), the back sides of the sliced batteries (100) are provided with back main grids (1002) on the opposite sides of the front main grids, and the two adjacent sliced batteries (100) are welded with the main grid welding strip (110) in a mode that the front sides and the back sides are sequentially alternated.

2. Solar cell module (1) according to claim 1, characterized in that: the utility model discloses a slice battery (100) is characterized in that the clearance distance at one side border of positive main grid (1001) with slice battery (100) border is 0.01mm-0.5mm, the width of positive main grid (1001) is 0.01mm-2mm, main grid solder strip (110) thickness is 0.05mm-0.15mm, the clearance distance at one side border of back main grid (1002) and the long edge border of slice battery (100) is not more than 50% of slice battery (100) width size and is not less than the lamination size, and back main grid (1002) width numerical value is 0.01mm-8 mm.

3. Solar cell module (1) according to claim 2, characterized in that: the gap distance between the edge of one side of the back main grid (1002), which is close to the long edge, and the edge of the long edge is 2-8 mm.

4. Solar cell module (1) according to claim 1, characterized in that: the battery string structure (11) is connected with a plurality of bypass diodes in parallel, each bypass diode is correspondingly and electrically connected to two ends of a corresponding number of partial sliced batteries (100) in the battery string structure (11), and the number of the diodes is less than or equal to that of the sliced batteries (100) in the battery string structure (11).

5. Solar cell module (1) according to claim 1, characterized in that: the shape of the series gap area of the main grid welding strip (110) in the length direction is flat, or circular arc, or wavy, or Z-shaped or V-shaped.

6. Solar cell module (1) according to claim 1, characterized in that: the string piece spacing between two adjacent sliced batteries (100) in the battery string structure (11) is 0.5mm-2 mm.

7. Solar cell module (1) according to claim 1, characterized in that: in the laminated structure (12), a welding area formed by a front main grid of one sliced cell (100) is positioned in an overlapping area and covered and shielded by another adjacent sliced cell (100), and the width of the overlapping area is 0.1-1 mm.

8. The utility model provides a high-efficient stromatolite curved surface photovoltaic tile, includes front bezel (3), backplate (4) and connector (5), its characterized in that: further comprising a solar cell module (1) according to any of claims 1-7 bonded between the front sheet (3) and the back sheet (4) by means of an adhesive (21) and an adhesive (22).

9. A preparation method of a high-efficiency laminated curved photovoltaic tile is characterized by comprising the following steps: the method comprises the following steps:

aligning and welding the cut main grid welding strip (110) with the front main grid (1001) of the sliced battery (100);

laminating two adjacent sliced batteries (100) welded with main grid welding strips (110) and insulating the overlapped areas of the two laminated batteries through insulating strips (120) to form laminated connection;

sequentially aligning and bonding a plurality of laminated connected sliced batteries (100) to form a laminated structure (12);

sequentially aligning a plurality of laminated structures (12), and alternately arranging one side, close to a front main grid (1001), of two adjacent sliced cells (100) at corresponding positions of the two adjacent laminated structures (12) and one side, close to a back main grid (1002), and then welding the extending end of a main grid welding strip (110) of the sliced cell (100) in the next laminated structure (12) with the back main grid (1002) of the corresponding sliced cell (100) in the previous laminated structure (12) to form a laminated string structure (10);

the plurality of cell string structures (11) in the stacked string structure (10) are connected in series and/or in parallel through the bus bars (130) to form a series-parallel structure (13), and electrodes of the series-parallel structure (13) are connected to the output position (140) through the bus bars (130) to form a bus-out line structure (14), so that the solar cell module (1) is assembled.

10. The method of making a high efficiency laminated curved photovoltaic tile according to claim 9, wherein: in the connecting step of the laminated structure (12), two adjacent sliced batteries (100) welded with the main grid welding strips (110) are arranged upwards in a stacked mode to form an overlapping area, the front main grid (1001) of the sliced battery (100) located below is located in the overlapping area, one side edge, close to the back main grid (1002), of the sliced battery (100) located above is flush with the edge of the front main grid (1001) of the sliced battery (100) located below, and the position of the double-sided adhesive tape on the insulating strip (120) is pressed, so that the two laminated sliced batteries (100) are bonded together through the double-sided adhesive tape in the overlapping area to form the laminated structure (12).