Photovoltaic module

Abstract

The utility model discloses a photovoltaic assembly, and belongs to the technical field of photovoltaic assemblies. The photovoltaic module comprises a battery piece, at least one first fine grid extending in the first direction is arranged on the surface of the battery piece, and the first fine grid comprises a plurality of first connecting parts arranged at intervals in the first direction and first connecting fine grids connected between every two adjacent first connecting parts. The first connecting part comprises at least two sub-connecting parts which are arranged at intervals in the second direction, and the second direction intersects with the first direction; the plurality of joint blocks are arranged at intervals in the first direction, and each joint block covers one first connecting part; the electric connecting piece extends in the second direction, and the electric connecting piece is connected to the first connecting part through a joint block; the joint block has a first projection on the plane where the battery piece is located, the first connecting part has a second projection on the plane where the battery piece is located, and the first projection covers the second projection.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic module technical field, concretely relates to a photovoltaic module. BACKGROUND

[0002] The photovoltaic module includes a cell sheet and an electrical connector, the cell sheet is the core component of the photovoltaic module, and it can convert solar energy into electric energy. The surface of the cell sheet is provided with a plurality of fine grids extending along a first direction and arranged at intervals along a second direction, and the fine grids are used to collect the current generated by the cell sheet. The electrical connector is arranged on the surface of the cell sheet and extends along the second direction. The electrical connector is connected to the plurality of fine grids, and the electrical connector is used to collect the current collected by the plurality of fine grids and transmit the current to an external circuit.

[0003] In the related art, the surface of the cell sheet is also provided with a solder pad, the solder pad is connected to the fine grid, and the electrical connector is welded to the solder pad. The solder pad is used to collect the current collected by the fine grid and transmit the current to the electrical connector, so as to improve the reliability of the connection between the electrical connector and the fine grid.

[0004] However, due to the inconsistent expansion coefficients between the solder pad and the fine grid, the fine grid may be broken, which affects the electrical performance and reliability of the photovoltaic module. In addition, the pulling force between the solder pad and the electrical connector is small, which also affects the electrical performance and reliability of the photovoltaic module. UTILITY MODEL CONTENTS

[0005] The utility model discloses a photovoltaic module to solve or at least partially solve the problem that the joint force between the solder pad and the fine grid is small in the prior art, which affects the electrical performance and reliability of the photovoltaic module.

[0006] To solve the above technical problems, the utility model is implemented as follows:

[0007] The utility model discloses a photovoltaic module, the photovoltaic module includes a cell sheet, the surface of the cell sheet is provided with at least one first fine grid extending along the first direction, the first fine grid includes a plurality of first connecting parts and first connecting fine grids connected between adjacent two first connecting parts and arranged at intervals along the first direction, the first connecting part includes at least two sub connecting parts arranged at intervals along the second direction, and the second direction intersects the first direction, a plurality of joint blocks, a plurality of joint blocks are arranged at intervals along the first direction, and each joint block covers one first connecting part, an electrical connector, the electrical connector extends along the second direction, and the electrical connector is connected to the first connecting part through the joint block, wherein the joint block has a first projection on the plane where the cell sheet is located, the first connecting part has a second projection on the plane where the cell sheet is located, and the first projection covers the second projection.

[0008] Optionally, the first connecting part comprises first and second sub connecting parts arranged at intervals along the second direction, and third and fourth sub connecting parts connected between the first and second sub connecting parts, the first, third, second and fourth sub connecting parts enclosing the first connecting part; the first connecting fine grid is connected to the third or fourth sub connecting part.

[0009] Optionally, the shape of the first projection is adapted to the shape of the second projection; and / or, the first projection is at least one of a square structure, a rectangular structure, a racetrack line structure, a circular structure, and an elliptical structure; and / or, the second projection is at least one of a square structure, a rectangular structure, a racetrack line structure, a circular structure, and an elliptical structure.

[0010] Optionally, the first projection is a rectangular structure, a length of the first projection along the second direction is greater than a width of the first projection along the first direction; the length of the first projection along the second direction is between 0.2 mm and 10 mm, and the width of the first projection along the first direction is between 0.2 mm and 10 mm.

[0011] Optionally, the length of the first projection along the second direction is 6 mm, and the width of the first projection along the first direction is 4 mm.

[0012] Optionally, the second projection is a rectangular structure, a length of the second projection along the second direction is greater than a width of the second projection along the first direction; and / or, the size of the second projection is adapted to the size of the first projection.

[0013] Optionally, a conductive adhesive block is further arranged between the joint block and the electrical connecting piece; the conductive adhesive block has a third projection on the plane where the battery piece is located, and the third projection falls within the second projection.

[0014] Optionally, the third projection is at least one of a square structure, a rectangular structure, a racetrack line structure, a circular structure, and an elliptical structure.

[0015] Optionally, the third projection is a rectangular structure, a length of the third projection along the second direction is between 1 mm and 3 mm, and a width of the third projection along the first direction is between 0.5 mm and 5 mm; and / or, a thickness of the conductive adhesive block along the thickness direction of the photovoltaic module is between 0.1 mm and 1 mm.

[0016] Optionally, the length of the third projection is 2mm along the second direction, and the width of the third projection is 4mm along the first direction; and / or, the thickness of the conductive glue block is 0.3mm along the thickness direction of the photovoltaic module.

[0017] Optionally, the cell piece has a first surface and a second surface arranged oppositely, the first fine grid is arranged on the first surface of the cell piece; the first surface of the cell piece is further provided with a second fine grid extending along the first direction, the second fine grid is arranged spaced apart from the first fine grid along the second direction, and an insulating block is arranged between the second fine grid and the electrical connector.

[0018] Optionally, the insulating block is arranged spaced apart from the first connecting portion along the second direction, and a gap exists between the insulating block and the first connecting portion.

[0019] Optionally, the length of the insulating block is between 1mm and 10mm along the second direction; and / or, the width of the insulating block is between 0.5mm and 5mm along the first direction.

[0020] Optionally, the length of the insulating block is 8mm along the second direction; and / or, the width of the insulating block is 3mm along the first direction.

[0021] The utility model discloses a kind of photovoltaic modules, which comprises cell piece, the surface of the cell piece is provided with at least one first fine grid extending along first direction, the first fine grid includes multiple first connecting portions and first connecting fine grid connected between adjacent two first connecting portions, the first connecting portion includes at least two sub-connecting portions arranged spaced apart along second direction, and the second direction intersects the first direction;Multiple bonding blocks, multiple bonding blocks are arranged spaced apart along the first direction, and each bonding block covers one first connecting portion;Electrical connector, the electrical connector extends along second direction, and the electrical connector is connected to the first connecting portion by the bonding block;Wherein, the bonding block has first projection on the plane where the cell piece is located, the first connecting portion has second projection on the plane where the cell piece is located, and the first projection covers the second projection.

[0022] In this invention, at least one first fine grid extending along a first direction is provided on the surface of the solar cell. The first fine grid includes a plurality of first connecting portions spaced apart along the first direction and a first connecting fine grid connecting two adjacent first connecting portions. Each first connecting portion includes at least two sub-connecting portions spaced apart along a second direction. Each first connecting portion is covered by a bonding block. An electrical connector extends along the second direction and is connected to the first connecting portion through the bonding block to collect the current gathered by the first fine grid. The first connecting portion includes at least two sub-connecting portions spaced apart along the second direction. By providing at least two sub-connecting portions, the reliability of the connection between the first fine grid and the bonding block is improved, making the connection between the bonding block and the first fine grid more reliable. This helps to ensure the photoelectric conversion efficiency of the photovoltaic module and the reliability of the photovoltaic module.

[0023] Reliability.

[0024] Furthermore, in this invention, the first projection of the bonding block on the plane where the solar cell is located is set to cover the second projection of the first connecting part on the plane where the solar cell is located. The electrical connector is connected to the first connecting part through the bonding block, thereby increasing the pull-out force between the bonding block and the electrical connector, which helps to improve the reliability of the connection between the bonding block and the electrical connector and ensure the photoelectric conversion efficiency of the photovoltaic module. Attached Figure Description

[0025] Figure 1 This diagram illustrates the structure of the photovoltaic module described in this embodiment of the present invention. Figure 1 ;

[0026] Figure 2 This diagram illustrates the structure of the photovoltaic module described in this embodiment of the present invention. Figure 2 ;

[0027] Figure 3 This diagram illustrates the structure of the photovoltaic module described in this embodiment of the present invention. Figure 3 .

[0028] Figure label:

[0029] 10: Battery cell; 11: First grid; 111: First connecting portion; 1111: First sub-connecting portion; 1112: Second sub-connecting portion; 1113: Third sub-connecting portion; 1114: Fourth sub-connecting portion; 112: First connecting grid; 12: Second grid;

[0030] 20: Connecting block;

[0031] 30: Conductive adhesive block;

[0032] 40: Insulating block;

[0033] X: First direction; Y: Second direction. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the scope of the present application.

[0035] It should be understood that the terms "one embodiment" or "an embodiment" as used throughout the specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Therefore, the appearance of the phrase "in one embodiment" or "in an embodiment" in various places throughout the specification is not necessarily referring to the same embodiment. In addition, these particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0036] Referring to Figure 1 , a structural schematic diagram of the photovoltaic module in the embodiment of the present application is shown Figure 1 ; referring to Figure 2 , a structural schematic diagram of the photovoltaic module in the embodiment of the present application is shown Figure 2 ; referring to Figure 3 , a structural schematic diagram of the photovoltaic module in the embodiment of the present application is shown Figure 3 .

[0037] As shown in Figures 1 to 3 , the embodiment of the present application discloses a photovoltaic module, which comprises a cell sheet 10, the surface of the cell sheet 10 is provided with at least one first fine grid 11 extending along a first direction X, the first fine grid 11 comprises a plurality of first connecting parts 111 arranged at intervals along the first direction X and a first connecting fine grid 112 connected between adjacent two first connecting parts 111, the first connecting part 111 comprises at least two sub connecting parts arranged at intervals along a second direction Y, and the second direction Y intersects the first direction X; a plurality of joint blocks 20, the plurality of joint blocks 20 are arranged at intervals along the first direction X, and each joint block 20 covers one first connecting part 111; an electrical connecting piece, the electrical connecting piece extends along the second direction Y, and the electrical connecting piece is connected to the first connecting part 111 through the joint block 20; wherein the joint block 20 has a first projection on the plane where the cell sheet 10 is located, the first connecting part 111 has a second projection on the plane where the cell sheet 10 is located, and the first projection covers the second projection.

[0038] The utility model discloses a kind of photovoltaic modules, photovoltaic module includes cell piece 10, cell piece 10 as the core component of photovoltaic module, it can convert solar energy into electric energy. Cell piece 10 has oppositely arranged first surface and second surface, first surface can be the light-receiving surface towards sunlight, also called as front surface, first surface can also be the back light surface away from sunlight, also called as back surface. When first surface is light-receiving surface, second surface is back light surface. When first surface is back light surface, second surface is light-receiving surface.

[0039] The first surface of cell piece 10 is back light surface, and the second surface is light-receiving surface as an example below, to carry out relevant explanation of the utility model.

[0040] As Figures 1 to 3 As shown, at least one first fine grid 11 extending along the first direction X is arranged on the first surface or the second surface of cell piece 10, and the first fine grid 11 can collect the current generated by cell piece 10. Wherein, the first fine grid 11 can be a positive grid line, or a negative grid line.

[0041] Exemplarily, when the photovoltaic module is a back contact photovoltaic module, the first fine grid 11 is arranged on the first surface of the cell piece 10, and the first surface of the cell piece 10 is also provided with a second fine grid 12, the second fine grid 12 also extends along the first direction X, and is arranged spaced apart from the first fine grid 11 along the second direction Y. Wherein, the first fine grid 11 and the second fine grid 12 both include a plurality of, the plurality of first fine grid 11 and the plurality of second fine grid 12 are alternately and spaced arranged along the second direction Y. In the case that the first fine grid 11 is a positive grid line, the second fine grid 12 is a negative grid line. In the case that the first fine grid 11 is a negative grid line, the second fine grid 12 is a positive grid line. To collect the current generated by cell piece 10 through the first fine grid 11 and the second fine grid 12.

[0042] Exemplarily, when the photovoltaic module is a double-sided photovoltaic module, in the case that the first fine grid 11 is arranged on the first surface of the cell piece 10, the second fine grid 12 is arranged on the second surface of the cell piece 10. In the case that the first fine grid 11 is arranged on the second surface of the cell piece 10, the second fine grid 12 is arranged on the first surface of the cell piece 10. Wherein, the first fine grid 11 and the second fine grid 12 both include a plurality of, the plurality of first fine grid 11 extends along the first direction X, and is spaced arranged along the second direction Y. The plurality of second fine grid 12 also extends along the first direction X, and is spaced arranged along the second direction Y. And, the polarity of the first fine grid 11 and the second fine grid 12 is opposite, to collect the current generated by cell piece 10 through the first fine grid 11 and the second fine grid 12.

[0043] As Figures 1 to 3As shown, the first fine grid 11 in the embodiment of the utility model includes multiple first connecting parts 111 arranged at intervals along the first direction X and first connecting fine grids 112 connected between adjacent two first connecting parts 111, and the first connecting part 111 includes at least two sub connecting parts arranged at intervals along the second direction Y.

[0044] The photovoltaic module disclosed in the embodiment of the utility model further includes multiple joint blocks 20 and an electric connecting piece, the multiple joint blocks 20 are arranged at intervals along the first direction X, and each joint block 20 covers one first connecting part 111. The electric connecting piece extends along the second direction Y, and the electric connecting piece is connected to the first connecting part 111 through the joint block 20, and the electric connecting piece is welded to the first connecting part 111 through the joint block 20 exemplarily. The electric connecting piece is electrically connected to the first connecting part 111 through the joint block 20, so that the current collected by the electric connecting piece to the first connecting part 111 is collected, and the electrical performance and reliability of the photovoltaic module are ensured.

[0045] Further, the first connecting part 111 includes at least two sub connecting parts arranged at intervals along the second direction Y, and the reliability of the connection between the first fine grid 11 and the joint block 20 is improved through the arrangement of the at least two sub connecting parts, so that the connection between the joint block 20 and the first fine grid 11 is more reliable, thereby helping to ensure the photoelectric conversion efficiency of the photovoltaic module and the reliability of the photovoltaic module.

[0046] It should be noted that the joint block 20 in the embodiment of the utility model has a first projection on the plane where the battery piece 10 is located, and the first connecting part 111 has a second projection on the plane where the battery piece 10 is located, and the first projection is arranged to cover the second projection, so that the electric connecting piece can be electrically connected to the first connecting part 111 through the joint block 20, the pulling force between the joint block 20 and the electric connecting piece is improved, thereby helping to improve the reliability of the connection between the joint block 20 and the electric connecting piece and ensuring the photoelectric conversion efficiency of the photovoltaic module.

[0047] The joint block 20 in the embodiment of the utility model can be a joint block formed of silver material or a joint block formed of other metal material with good conductivity. In the embodiment of the utility model, the specific material of the joint block 20 is not limited too much, and in actual application, the technical personnel can select as needed.

[0048] The cross-section of the electrical connector in this embodiment of the invention along the height of the photovoltaic module can be rectangular, square, circular, elliptical, or other irregularly shaped. Exemplarily, the electrical connector can be a solder strip, which includes a substrate and a metal layer covering the surface of the substrate. The substrate can be an aluminum substrate, a copper substrate, etc., and the metal layer can be a tin layer, a nickel layer, etc.

[0049] Optionally, such as Figures 1 to 3 As shown, in this embodiment of the present invention, the first connecting portion 111 includes a first sub-connecting portion 1111 and a second sub-connecting portion 1112 spaced apart along the second direction Y, and a third sub-connecting portion 1113 and a fourth sub-connecting portion 1114 connected between the first sub-connecting portion 1111 and the second sub-connecting portion 1112. The first sub-connecting portion 1111, the third sub-connecting portion 1113, the second sub-connecting portion 1112 and the fourth sub-connecting portion 1114 surround to form the first connecting portion 111; the first connecting grid 112 is connected to the third sub-connecting portion 1113 or the fourth sub-connecting portion 1114.

[0050] like Figures 1 to 3 As shown in the embodiment of this utility model, the first connecting portion 111 is formed by the first sub-connecting portion 1111, the third sub-connecting portion 1113, the second sub-connecting portion 1112, and the fourth sub-connecting portion 1114. The reliability of the connection between the first fine grid 11 and the bonding block 20 is improved by the first sub-connecting portion 1111, the second sub-connecting portion 1112, the third sub-connecting portion 1113, and the fourth sub-connecting portion 1114, making the connection between the bonding block 20 and the first fine grid 11 more reliable, thereby helping to ensure the photoelectric conversion efficiency and reliability of the photovoltaic module.

[0051] Furthermore, the arrangement of the third sub-connection portion 1113 and the fourth sub-connection portion 1114 facilitates the connection between the first connecting fine gate 112 and the first connecting portion 111. The current collected by the first connecting fine gate 112 is gathered through the first connecting portion 111, and the gathered current is transmitted to the electrical connector through the connecting block 20.

[0052] Optionally, such as Figures 1 to 3 As shown in the embodiments of this utility model, the shape of the first projection is adapted to the shape of the second projection; and / or, the first projection is at least one of a square structure, a rectangular structure, a runway line structure, a circular structure, and an elliptical structure; and / or, the second projection is at least one of a square structure, a rectangular structure, a runway line structure, a circular structure, and an elliptical structure.

[0053] like Figures 1 to 3As shown, in this embodiment of the invention, the shape of the first projection is adapted to the shape of the second projection. That is, when the first projection is a square structure, the second projection is also a square structure. When the first projection is a circular structure, the second projection is also a circular structure. When the first projection is a rectangular structure, the second projection is also a rectangular structure. By setting the shape of the first projection to be adapted to the shape of the second projection, so that the first projection can cover the second projection, the electrical connector can be electrically connected to the first connecting part 111 through the connecting block 20, thereby improving the reliability of the connection between the connecting block 20 and the electrical connector and ensuring the photoelectric conversion efficiency of the photovoltaic module.

[0054] Furthermore, the shapes of the first projection and the second projection are adapted to each other. Along the second direction Y, neither the first connecting part 111 nor the connecting block 20 extends too long, so as to avoid the first connecting part 111 or the connecting block 20 connecting to the adjacent grid, causing a local short circuit in the photovoltaic module and affecting the photoelectric conversion efficiency of the photovoltaic module.

[0055] In this embodiment of the invention, the first projection and / or the second projection are at least one of a square structure, a rectangular structure, a racetrack line structure, a circular structure, and an elliptical structure. That is, the projection of the first connecting part 111 and / or the bonding block 20 onto the plane of the solar cell 10 is at least one of a square structure, a rectangular structure, a racetrack line structure, a circular structure, and an elliptical structure. By setting the projection of the first connecting part 111 and / or the bonding block 20 onto the plane of the solar cell 10 to at least one of a square structure, a rectangular structure, a racetrack line structure, a circular structure, and an elliptical structure, the shapes of the first connecting part 111 and the bonding block 20 are simplified, facilitating the setting of the first fine grid 11 on the surface of the solar cell 10, simplifying the photovoltaic module manufacturing process, improving the photovoltaic module manufacturing yield, reducing the photovoltaic module cost, and enhancing the market competitiveness of the photovoltaic module.

[0056] It should be noted that the above are merely individual examples of the specific shapes of the first connecting part 111 and the connecting block 20 in the embodiments of this utility model, and are not intended to limit the utility model. In practical applications, those skilled in the art can also set the specific shapes of the first connecting part 111 and the connecting block 20 as needed.

[0057] Optionally, such as Figures 1 to 3 As shown, in this embodiment of the present invention, the first projection is a rectangular structure, and the length of the first projection along the second direction Y is greater than the width of the first projection along the first direction X; the length of the first projection along the second direction Y is between 0.2mm and 10mm, and the width of the first projection along the first direction X is between 0.2mm and 10mm.

[0058] like Figures 1 to 3As shown, in the embodiment of the utility model, the first projection is set as a rectangular structure, and the length of the first projection along the second direction Y is greater than the width of the first projection along the first direction X, the length of the first projection along the second direction Y is between 0.2mm to 10mm, and the width of the first projection along the first direction X is between 0.2mm to 10mm. So that the size of the first projection is more appropriate, the first projection will not extend too long along the second direction Y, causing the first connecting part 111 to be connected to the adjacent fine grid, causing the photovoltaic module to appear a local short circuit phenomenon, affecting the photoelectric conversion efficiency of the photovoltaic module.

[0059] Further, the size of the first projection along the first direction X is also more appropriate to avoid the electrical connector from being offset to the outside of the first connecting part 111 and the joint block 20, affecting the reliability of the connection between the electrical connector and the first connecting part 111.

[0060] Exemplarily, along the second direction Y, the length of the first projection can be set to 0.2mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc. Along the first direction X, the width of the first projection can be set to 0.2mm, 0.5mm, 1.5mm, 2.5mm, 3.5mm, 4.5mm, 5.5mm, 6.5mm, 7.5mm, 8.5mm, 9.5mm, 10mm, etc.

[0061] Of course, the above is only an individual example of the specific length of the first projection along the second direction Y and an individual example of the specific width of the first projection along the first direction X, and is not a limitation of the utility model. In actual application, the technician can set the width of the first projection along the first direction X and the length of the first projection along the second direction Y according to the width of the electrical connector along the first direction X and the width of the gap between the two adjacent first fine grids 11 or the first fine grid 11 and the adjacent second fine grid 12 along the second direction Y.

[0062] As a preferred embodiment, the length of the first projection along the second direction Y in the embodiment of the utility model is 6mm, and the width of the first projection along the first direction X is 4mm.

[0063] As a preferred embodiment, in the embodiment of the utility model, the length of the first projection along the second direction Y is set to 6mm, and the width of the first projection along the first direction X is set to 4mm. So that the size of the first projection is more optimal, the joint force between the first connecting part 111 and the joint block 20 is large enough, and the connection between the joint block 20 and the first connecting part 111 is more reliable, thereby helping to improve the reliability of the photovoltaic module and ensuring the photoelectric conversion efficiency of the photovoltaic module.

[0064] Furthermore, along the second direction Y, the first projection will not extend too far, causing the first connecting part 111 to connect to the adjacent fine grid, resulting in a short circuit in the photovoltaic module and affecting the photoelectric conversion efficiency of the photovoltaic module. The size of the first projection along the first direction X is also more appropriate to avoid the electrical connector shifting to the outside of the first connecting part 111 and the connecting block 20, affecting the reliability of the connection between the electrical connector and the first connecting part 111.

[0065] Optionally, such as Figures 1 to 3 As shown, in this embodiment of the present invention, the second projection is a rectangular structure, and the length of the second projection along the second direction Y is greater than the width of the second projection along the first direction X; and / or, the size of the second projection is adapted to the size of the first projection.

[0066] like Figures 1 to 3 As shown in the present invention embodiment, the second projection is set as a rectangular structure, and the length of the second projection along the second direction Y is greater than the width of the second projection along the first direction X, so that the structure of the joining block 20 is the same as the structure of the first connecting part 111. The joining block 20 can cover the first connecting part 111, so as to improve the reliability of the connection between the electrical connector and the first connecting part 111 through the joining block 20, thereby ensuring the photoelectric conversion efficiency of the photovoltaic module.

[0067] Furthermore, the structure of the bonding block 20 is the same as that of the first connecting part 111, which helps to improve the bonding force between the bonding block 20 and the first connecting part 111, making the connection between the bonding block 20 and the first connecting part 111 more reliable, thereby helping to improve the reliability of the photovoltaic module and ensure the photoelectric conversion efficiency of the photovoltaic module.

[0068] In this embodiment of the invention, the size of the second projection is adapted to the size of the first projection. It can be understood that the size of the second projection is greater than or equal to the size of the first projection. That is, the size of the second projection can be exactly the same as the size of the first projection. For example, the length of the first projection along the second direction Y is 6mm, and the width along the first direction X is 4mm; the length of the second projection along the second direction Y is 6mm, and the width along the first direction X is 4mm. Alternatively, the size of the second projection is slightly larger than the size of the first projection. For example, the length of the first projection along the second direction Y is 6mm, and the width along the first direction X is 4mm; the length of the second projection along the second direction Y is 6.5mm, and the width along the first direction X is 4.5mm.

[0069] In this embodiment of the present invention, the size of the second projection is set to be adapted to the size of the first projection so that the second projection can cover the first projection. The electrical connector can be connected to the first connection part 111 through the connecting block 20, thereby improving the reliability of the connection between the first connection part 111 and the electrical connector and ensuring the photoelectric conversion efficiency of the photovoltaic module.

[0070] Further, it can also avoid the bonding block 20 being too large, resulting in waste of the bonding block 20 material, making the cost of the photovoltaic module higher, and affecting the market competitiveness of the photovoltaic module. In addition, the bonding block 20 being too large also easily causes the bonding block 20 to be connected to the adjacent fine grids, causing the photovoltaic module to appear short circuit and other phenomena, affecting the reliability of the photovoltaic module.

[0071] Optionally, as shown in Figure 3 The utility model discloses a bonding block 20 and the electric connecting piece between still be provided with conductive glue block 30, and conductive glue block 30 has third projection on the plane of battery piece 10, and third projection falls into second projection.

[0072] As shown in Figure 3 The utility model discloses a bonding block 20 and the electric connecting piece between still be provided with conductive glue block 30, and conductive glue block 30 further promotes the reliability of the connection between bonding block 20 and electric connecting piece, and ensures the photoelectric conversion efficiency of photovoltaic module.

[0073] In the processing of photovoltaic module, conductive glue block 30 can be printed on the side of bonding block 20 away from first connecting portion 111 by printing. The melting temperature of conductive glue block 30 is greater than or equal to 160 degrees and less than or equal to 200 degrees. Preferably, the melting temperature of conductive glue block 30 is 170 degrees.

[0074] As shown in Figure 3 The utility model discloses a bonding block 20 and the electric connecting piece between still be provided with conductive glue block 30, and conductive glue block 30 further promotes the reliability of the connection between bonding block 20 and electric connecting piece, and ensures the photoelectric conversion efficiency of photovoltaic module.

[0075] Further, the third projection of conductive glue block 30 on the plane of battery piece 10 is less than the second projection of bonding block 20 on the plane of battery piece 10, which also helps to reduce the amount of conductive glue block 30 material, reduce the cost of the photovoltaic module. In addition, it can avoid the conductive glue block 30 flowing to the gap between the first fine grid 11 and the second fine grid 12, connecting the first fine grid 11 and the second fine grid 12, causing the photovoltaic module to appear local short circuit phenomenon, affecting the photoelectric conversion efficiency of the photovoltaic module.

[0076] Exemplarily, the conductive glue block 30 in the utility model embodiment can be a tin glue block, can be a nickel glue block, or can be other metal glue blocks with good conductivity.

[0077] Optionally, the third projection in this embodiment of the present invention is at least one of a square structure, a rectangular structure, a runway line structure, a circular structure, and an elliptical structure.

[0078] In this embodiment of the invention, the third projection of the conductive adhesive block 30 on the plane where the solar cell 10 is located is set to at least one of a square structure, a rectangular structure, a racetrack line structure, a circular structure, and an elliptical structure. This is to ensure that the shape of the third projection matches the second projection, the third projection falls within the second projection, and the third projection is large enough so that the electrical connector can be electrically connected to the bonding block 20 through the conductive adhesive block 30, thereby improving the reliability of the electrical connection between the electrical connector and the bonding block 20 and ensuring the photoelectric conversion efficiency of the photovoltaic module.

[0079] Optionally, such as Figure 3 As shown, in this embodiment of the present invention, the third projection is a rectangular structure. Along the second direction Y, the length of the third projection is between 1 mm and 3 mm, and along the first direction X, the width of the third projection is between 0.5 mm and 5 mm; and / or, along the thickness direction of the photovoltaic module, the thickness of the conductive adhesive block 30 is between 0.1 mm and 1 mm.

[0080] like Figure 3 As shown in this embodiment of the invention, the third projection of the conductive adhesive block 30 on the plane of the battery cell 10 is set as a rectangular structure, and the length of the third projection along the second direction Y is greater than the width of the third projection along the first direction X. The length of the third projection along the second direction Y is between 1mm and 3mm, and the width of the third projection along the first direction X is between 0.5mm and 5mm.

[0081] During the welding process of electrical connectors, the conductive adhesive block 30 will be heated and molten. The above setting makes the size of the conductive adhesive block 30 more suitable, and avoids the conductive adhesive block 30 flowing into the gap between the first fine grid 11 and the second fine grid 12, connecting the first fine grid 11 and the second fine grid 12, causing a partial short circuit in the photovoltaic module and affecting the photoelectric conversion efficiency of the photovoltaic module.

[0082] Furthermore, the width of the conductive adhesive block 30 along the first direction X is approximately equal to the width of the electrical connector. The conductive adhesive block 30 can more reliably connect the electrical connector to the bonding block 20, thereby improving the reliability of the photovoltaic module. For example, the length of the third projection along the second direction Y can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, etc. The width of the third projection along the first direction X can be 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, etc.

[0083] In the embodiment of the utility model, the thickness of the conductive glue block 30 is set to be between 0.1mm and 1mm along the thickness direction of the photovoltaic module, so that the thickness of the conductive glue block 30 is small, and the conductive glue block 30 is prevented from supporting the electrical connecting piece, which leads to the quality problem of the battery piece 10, such as hidden crack, due to the different height of the electrical connecting piece in the process of laminating the photovoltaic module, and affects the process yield of the photovoltaic module.

[0084] Further, the small thickness of the conductive glue block 30 also helps to reduce the material usage of the conductive glue block 30, thereby reducing the cost of the photovoltaic module and improving the market competitiveness of the photovoltaic module.

[0085] Exemplarily, the thickness of the conductive glue block 30 can be set to 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.6mm, 0.8mm, 1mm, etc. along the thickness direction of the photovoltaic module.

[0086] As a preferred embodiment, the length of the third projection is 2mm along the second direction Y, and the width of the third projection is 4mm along the first direction X; and / or, the thickness of the conductive glue block 30 is 0.3mm along the thickness direction of the photovoltaic module.

[0087] As a preferred embodiment, in the embodiment of the utility model, the length of the third projection is set to be 2mm along the second direction Y, and the width of the third projection is set to be 4mm along the first direction X. In this way, the size of the conductive glue block 30 is more appropriate, and the conductive glue block 30 is prevented from flowing into the gap between the first fine grid 11 and the second fine grid 12 to connect the first fine grid 11 and the second fine grid 12, which leads to the local short circuit phenomenon of the photovoltaic module and affects the photoelectric conversion efficiency of the photovoltaic module.

[0088] Further, the width of the conductive glue block 30 along the first direction X is equivalent to the width of the electrical connecting piece, and the conductive glue block 30 can more firmly connect the electrical connecting piece to the joint block 20, thereby improving the reliability of the photovoltaic module.

[0089] In the embodiment of the utility model, the thickness of the conductive glue block 30 is set to be 0.3mm along the thickness direction of the photovoltaic module, so that the thickness of the conductive glue block 30 is small, and the conductive glue block 30 is prevented from supporting the electrical connecting piece, which leads to the quality problem of the battery piece 10, such as hidden crack, due to the different height of the electrical connecting piece in the process of laminating the photovoltaic module, and affects the process yield of the photovoltaic module. Further, the small thickness of the conductive glue block 30 also helps to reduce the material usage of the conductive glue block 30, thereby reducing the cost of the photovoltaic module and improving the market competitiveness of the photovoltaic module.

[0090] Optionally, as shown in FIG. 6, the conductive glue block 30 can be arranged on the joint block 20 along the first direction X. Figure 2 and Figure 3As shown, the battery piece 10 in the embodiment of the utility model has the first surface and the second surface which are oppositely arranged, the first fine grid 11 is arranged on the first surface of the battery piece 10, the first surface of the battery piece 10 is further provided with the second fine grid 12 extending along the first direction X, the second fine grid 12 is arranged along the second direction Y with the first fine grid 11, and the insulating block 40 is arranged between the second fine grid 12 and the electric connecting piece.

[0091] As described above, the first surface of the battery piece 10 is the back light surface, and the second surface is the light receiving surface. The photovoltaic module disclosed in the embodiment of the utility model can be a back contact type photovoltaic module. That is, the first surface of the battery piece is provided with the first fine grid 11 and the second fine grid 12, the first fine grid 11 and the second fine grid 12 extend along the first direction X, and are alternately arranged along the second direction Y. The polarity of the first fine grid 11 and the second fine grid 12 is opposite, so as to collect the current generated by the first fine grid 11 and the second fine grid 12 to the battery piece 10.

[0092] In the embodiment of the utility model, the insulating block 40 is arranged between the second fine grid 12 and the electric connecting piece, so as to block the electric connecting piece and the second fine grid 12 through the insulating block 40, so as to avoid the short circuit phenomenon of the photovoltaic module, and affect the photoelectric conversion efficiency of the photovoltaic module.

[0093] It should be noted that, as Figures 1 to 3 As shown, in the embodiment of the utility model, the structure of the second fine grid 12 is the same as that of the first fine grid 11. Here, it will not be repeated.

[0094] Optionally, as Figure 2 And Figure 3 As shown, along the second direction Y, the insulating block 40 and the first connecting part 111 are arranged with a gap between the insulating block 40 and the first connecting part 111.

[0095] As Figure 2 And Figure 3 As shown, the insulating block 40 and the first connecting part 111 are arranged along the second direction Y with a gap between the insulating block 40 and the first connecting part 111, so as to avoid that the insulating block 40 extends to the upper side of the first connecting part 111, affect the reliability of the connection between the electric connecting piece and the first connecting part 111, and cause the local conversion efficiency of the photovoltaic module to be reduced.

[0096] Optionally, along the second direction Y, the length of the insulating block 40 is between 1mm and 10mm; and / or, along the first direction X, the width of the insulating block 40 is between 0.5mm and 5mm.

[0097] In the embodiment of the utility model, along the second direction Y, the length of the insulation block 40 is set to be between 1mm and 10mm, and along the first direction X, the width of the insulation block 40 is set to be between 0.5mm and 5mm. So that the insulation block 40 can block the electric connecting piece and the second fine grid 12, avoid the electric connecting piece connecting to the second fine grid 12, cause the photovoltaic module to appear local short circuit phenomenon, influence the photoelectric conversion efficiency of the photovoltaic module.

[0098] Exemplarily, along the second direction Y, the length of the insulation block 40 can be set to 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc. Along the first direction X, the width of the insulation block 40 can be set to 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, etc.

[0099] As a preferred implementation, along the second direction Y, the length of the insulation block 40 is 8mm; and / or, along the first direction X, the width of the insulation block 40 is 3mm.

[0100] As a preferred implementation, in the embodiment of the utility model, along the second direction Y, the length of the insulation block 40 is set to 8mm, and along the first direction X, the width of the insulation block 40 is set to 3mm. So that the size of the insulation block 40 is sufficient to block the electric connecting piece and the second fine grid 12, avoid the electric connecting piece connecting to the second fine grid 12, cause the photovoltaic module to appear short circuit phenomenon, influence the reliability of the photovoltaic module.

[0101] Further, the size of the insulation block 40 can also be avoided to be large, extend between the first connecting part 111 and the electric connecting piece, influence the reliability of the connection between the first connecting part 111 and the electric connecting piece, cause the local conversion efficiency of the photovoltaic module to be reduced.

[0102] The utility model discloses a kind of photovoltaic modules, which comprises cell piece, the surface of the cell piece is provided with at least one first fine grid extending along first direction, the first fine grid includes multiple first connecting parts and first connecting fine grid connected between adjacent two first connecting parts, and the first connecting part includes at least two sub-connecting parts spaced apart along second direction, and the second direction intersects the first direction;Multiple bonding blocks, multiple bonding blocks are spaced apart along the first direction, and each bonding block covers one first connecting part;Electric connecting piece, the electric connecting piece extends along second direction, and the electric connecting piece is connected to the first connecting part by the bonding block;Wherein, the bonding block has first projection on the plane where the cell piece is located, the first connecting part has second projection on the plane where the cell piece is located, and the first projection covers the second projection.

[0103] The utility model discloses a first fine grid is arranged on the surface of the battery piece, and the first fine grid includes a plurality of first connecting parts and the first connecting fine grid connected between the adjacent two first connecting parts, the first connecting part includes at least two sub connecting parts arranged at intervals along the second direction, and one joint block is covered on each first connecting part, and the electric connecting piece extends along the second direction, and the electric connecting piece is connected to the first connecting part through the joint block to gather the current collected by the first fine grid.

[0104] Further, the first projection of the joint block on the plane of the battery piece is arranged to cover the second projection of the first connecting part on the plane of the battery piece, the electric connecting piece is connected to the first connecting part through the joint block, the pulling force between the joint block and the electric connecting piece is improved, and thus the reliability of the connection between the joint block and the electric connecting piece is improved, and the photoelectric conversion efficiency of the photovoltaic module is ensured.

[0105] It should be noted that each embodiment in the specification adopts a progressive manner for description, and each embodiment focuses on the difference from other embodiments, and the same or similar parts of each embodiment can be referred to each other.

[0106] Although the optional embodiments of the utility model embodiments have been described, those skilled in the art can make other changes and modifications to the embodiments once the basic creative concept is known. Therefore, the appended claims are intended to include the optional embodiments and all changes and modifications falling within the scope of the utility model embodiments.

[0107] Finally, it should be further noted that, in this paper, relationship terms such as first and second are only used to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between the entities. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such article or terminal device. Without more limitation, the element defined by the statement "including one" does not exclude the existence of other same elements in the article or terminal device including the element.

[0108] The above technical solutions provided by the utility model are described in detail, and the principles and implementation manners of the utility model are described by applying specific examples, and for the general technical personnel in the field, the principles and implementation manners of the utility model will have changes in the specific implementation manners and application ranges, and in conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A photovoltaic module, characterized by, The battery piece has a surface provided with at least one first fine grid extending in a first direction, the first fine grid comprising a plurality of first connecting portions arranged at intervals in the first direction and a first connecting fine grid connected between adjacent two first connecting portions, the first connecting portion comprising at least two sub-connecting portions arranged at intervals in a second direction intersecting the first direction; a plurality of bonding blocks arranged at intervals in the first direction, each bonding block covering one first connecting portion; an electrical connector extending in a second direction, the electrical connector being connected to the first connecting portion through the bonding block; wherein the bonding block has a first projection in the plane of the battery piece, the first connecting portion has a second projection in the plane of the battery piece, and the first projection covers the second projection. The first connecting portion comprises a first sub-connecting portion and a second sub-connecting portion arranged at intervals in the second direction, and a third sub-connecting portion and a fourth sub-connecting portion connected between the first sub-connecting portion and the second sub-connecting portion, the first sub-connecting portion, the third sub-connecting portion, the second sub-connecting portion and the fourth sub-connecting portion circumscribing the first connecting portion; 2. The photovoltaic module of claim 1, wherein, The first connecting fine grid is connected to the third sub-connecting portion or the fourth sub-connecting portion. The shape of the first projection is adapted to the shape of the second projection; 3. The photovoltaic module of claim 1, wherein, and / or, the first projection is at least one of a square structure, a rectangular structure, a racetrack line structure, a circular structure, and an elliptical structure; and / or, the second projection is at least one of a square structure, a rectangular structure, a racetrack line structure, a circular structure, and an elliptical structure. The first projection is a rectangular structure, the length of the first projection in the second direction is greater than the width of the first projection in the first direction; 4. The photovoltaic module of claim 3, wherein, The length of the first projection in the second direction is between 0.2mm and 10mm, and the width of the first projection in the first direction is between 0.2mm and 10mm. The length of the first projection in the second direction is 6mm, and the width of the first projection in the first direction is 4mm.

5. The photovoltaic module of claim 4, wherein, The second projection is a rectangular structure, the length of the second projection in the second direction is greater than the width of the second projection in the first direction; 6. The photovoltaic module according to any of claims 3-5, characterized in that, and / or, the size of the second projection is adapted to the size of the first projection. A conductive adhesive block is further arranged between the bonding block and the electrical connector; 7. The photovoltaic module of claim 1, wherein, The conductive adhesive block has a third projection in the plane of the battery piece, and the third projection falls within the second projection. The third projection is at least one of a square structure, a rectangular structure, a racetrack line structure, a circular structure, and an elliptical structure.

8. The photovoltaic module of claim 7, wherein, The third projection is a rectangular structure, the length of the third projection in the second direction is between 1mm and 3mm, and the width of the third projection in the first direction is between 0.5mm and 5mm; 9. The photovoltaic module of claim 7, wherein, and / or, the thickness of the conductive adhesive block in the thickness direction of the photovoltaic module is between 0.1mm and 1mm. ​ 10. The photovoltaic module of claim 9, wherein, In the second direction, the length of the third projection is 2 mm, and in the first direction, the width of the third projection is 4 mm. In the thickness direction of the photovoltaic module, the thickness of the conductive glue block is 0.3 mm.

11. The photovoltaic module of claim 1, wherein, The cell sheet has a first surface and a second surface arranged oppositely, and the first fine grid is arranged on the first surface of the cell sheet. The first surface of the cell sheet is further provided with a second fine grid extending in the first direction, the second fine grid is arranged spaced apart from the first fine grid in the second direction, and an insulating block is arranged between the second fine grid and the electrical connector.

12. The photovoltaic module of claim 11, wherein, In the second direction, the insulating block is arranged spaced apart from the first connecting portion, and there is a gap between the insulating block and the first connecting portion.

13. The photovoltaic module of claim 12, wherein, In the second direction, the length of the insulating block is between 1 mm and 10 mm. In the first direction, the width of the insulating block is between 0.5 mm and 5 mm.

14. The photovoltaic module of claim 13, wherein, In the second direction, the length of the insulating block is 8 mm. In the first direction, the width of the insulating block is 3 mm.

Images