Photovoltaic module and photovoltaic system

Abstract

The utility model discloses a photovoltaic assembly and a photovoltaic system, and belongs to the field of photovoltaic technology. The photovoltaic module comprises a plurality of battery pieces; the plurality of battery pieces are connected through the plurality of interconnection strips, the plurality of interconnection strips extend along a first direction, the plurality of interconnection strips at least partially connected to each battery piece are arranged at intervals along a second direction, and the second direction intersects with the first direction; at least parts of the plurality of adhesive tapes are arranged in partial areas of one sides, far away from the battery pieces, of the plurality of interconnection strips, and the plurality of adhesive tapes extend along the first direction and are arranged at intervals along the second direction; wherein the adhesive tape is sequentially provided with a first area, a second area and a third area from outside to inside, and in the thickness direction of the photovoltaic module, the thickness of the second area is firstly increased and then decreased in the second direction.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and in particular to a photovoltaic component and a photovoltaic system. Background Art

[0002] The photovoltaic module includes a backplane, a battery string layer and a front glass stacked in sequence. The backplane is bonded to the back of the battery string layer by a first adhesive film, and the front glass is bonded to the front of the battery string layer by a second adhesive film. Thus, the battery string layer can be supported and fixed by the backplane and the front glass. Among them, the battery string layer includes a plurality of battery cells arranged at intervals, and two adjacent battery cells are connected in series by interconnection structures such as welding strips to form a battery string layer.

[0003] In the prior art, a rubber strip is usually used to fix one end of the welding ribbon to the surface of one battery cell, and the other end of the welding ribbon is fixed to the surface of another adjacent battery cell, so that the welding ribbon can connect two adjacent battery cells.

[0004] However, the adhesive strips in the prior art are usually of uniform thickness. When the adhesive strips are thin, they are easily damaged during the processing of photovoltaic modules, and the first adhesive film or the second adhesive film will flow from the damaged part of the adhesive strips to between the welding strips and the battery cells, causing a short circuit in the photovoltaic module. When the adhesive strips are thicker, on the one hand, the cost of the photovoltaic module is higher, and on the other hand, the thicker the adhesive strips, the worse the tightness of the adhesive strips and the battery cells, and bubbles are easily present between the interconnected structures such as the adhesive strips and the welding strips and the battery cells, which ultimately affects the yield of the photovoltaic module. Utility Model Content

[0005] The utility model discloses a photovoltaic module and a photovoltaic system to solve or at least partially solve the problems existing in the prior art, that when the rubber strip is thin, the rubber strip is easily damaged during the processing of the photovoltaic module, and the first rubber film or the second rubber film will flow from the damaged part of the rubber strip to between the welding strip and the battery cell, causing a short circuit in the photovoltaic module. When the rubber strip is thick, on the one hand, the cost of the photovoltaic module is high, and on the other hand, the thicker the rubber strip, the worse the tightness of the rubber strip and the battery cell, and bubbles are easily present between the interconnection structure such as the rubber strip and the welding strip and the battery cell, which ultimately affects the yield of the photovoltaic module.

[0006] In order to solve the above technical problems, the utility model is achieved as follows:

[0007] In a first aspect, the utility model discloses a photovoltaic module, which includes: a plurality of battery cells; a plurality of interconnecting strips, the plurality of interconnecting strips connecting the plurality of battery cells, the plurality of interconnecting strips all extending along a first direction, the plurality of interconnecting strips at least partially connected to each of the battery cells are arranged at intervals along a second direction, and the second direction intersects with the first direction; a plurality of rubber strips, at least part of the plurality of rubber strips are arranged in a partial area on a side of the plurality of interconnecting strips away from the battery cells, and the plurality of rubber strips all extend along the first direction and are arranged at intervals along the second direction; wherein the rubber strips are sequentially provided with a first area, a second area, and a third area from the outside to the inside, wherein, in the thickness direction of the photovoltaic module, the thickness of the second area first increases and then decreases along the second direction.

[0008] Optionally, the second region has a first side connected to the first region and a second side connected to the third region, wherein, in the thickness direction of the photovoltaic component, the thickness of the first side is equal to the thickness of the side of the first region connected to the first side, and the thickness of the second side is equal to the thickness of the side of the third region connected to the second side.

[0009] Optionally, in a thickness direction of the photovoltaic component, a thickness of the first region is greater than a thickness of the third region.

[0010] Optionally, the photovoltaic module also includes an adhesive film, which is stacked on the side of the adhesive strip away from the battery cell; in the thickness direction of the photovoltaic module, the thickness of the second region and the thickness of the adhesive film corresponding to the second region have a first ratio, and along the second direction, the first ratio first increases and then decreases.

[0011] Optionally, the first ratio is greater than or equal to 10% and less than or equal to 40%.

[0012] Optionally, in the thickness direction of the photovoltaic module, the thickness of the first region and the thickness of the adhesive film corresponding to the first region have a second ratio, and the second ratio is greater than or equal to 10% and less than or equal to 40%; and / or, in the thickness direction of the photovoltaic module, the thickness of the third region and the thickness of the adhesive film corresponding to the third region have a third ratio, and the third ratio is greater than or equal to 10% and less than or equal to 60%.

[0013] Optionally, in the thickness direction of the photovoltaic module, the second region has a maximum thickness, and the maximum thickness is tangent to the outermost side of the interconnection strip along the second direction.

[0014] Optionally, along the second direction, the width of the interconnection strip is K, the width of a single first region is a, satisfying K≤a≤2K; and / or, along the second direction, the gap between two adjacent interconnection strips is L, satisfying 0.5mm≤a≤L / 2.

[0015] Optionally, along the first direction, a distance between an end of the adhesive strip closest to an edge of the photovoltaic component and an end of the adhesive film close to the same edge of the photovoltaic component is greater than or equal to 10 mm.

[0016] Optionally, in the thickness direction of the photovoltaic module, the thickness of the adhesive strip is greater than or equal to 0.02 mm and less than or equal to 0.7 mm.

[0017] Optionally, optionally, the cross-section of the interconnection strip is one of a circular structure, a square structure, a rectangular structure, a triangular structure, a pentagonal structure and a quasi-rectangular structure.

[0018] Optionally, when the cross-section of the interconnecting strip is a square structure, a rectangular structure or a quasi-rectangular structure, in the thickness direction of the photovoltaic module, the thickness of the second region is greater than or equal to 0.02 mm and less than or equal to 0.7 mm; and / or, the thickness of the first region is greater than or equal to 0.05 mm and less than or equal to 0.2 mm; and / or, the thickness of the third region is greater than or equal to 0.02 mm and less than or equal to 0.1 mm; and / or, along the second direction, the width of the third region is greater than or equal to 0.2 mm and less than or equal to 4 mm.

[0019] Optionally, when the cross-section of the interconnecting strip is a circular structure, the thickness of the second region is greater than or equal to 0.02 mm and less than or equal to 0.4 mm; and / or, the thickness of the first region is greater than or equal to 0.05 mm and less than or equal to 0.2 mm; and / or, the thickness of the third region is greater than or equal to 0.02 mm and less than or equal to 0.1 mm; and / or, along the second direction, the width of the third region is greater than or equal to 0.1 mm and less than or equal to 0.4 mm.

[0020] Optionally, the photovoltaic module further includes a conductive portion, which is disposed between the interconnection bar and the battery cell; and / or the photovoltaic module further includes an insulating portion, which is disposed between the interconnection bar and the battery cell.

[0021] In a second aspect, the utility model further discloses a photovoltaic system, which includes the photovoltaic assembly described in the first aspect.

[0022] The utility model discloses a photovoltaic component and a photovoltaic system, the photovoltaic component comprising: a plurality of battery cells; a plurality of interconnection strips, the plurality of interconnection strips connect the plurality of battery cells, the plurality of interconnection strips all extend along a first direction, the plurality of interconnection strips at least partially connected to each of the battery cells are arranged at intervals along a second direction, the second direction intersects with the first direction; a plurality of rubber strips, at least a portion of the plurality of rubber strips are arranged in a partial area on a side of the plurality of interconnection strips away from the battery cells, and the plurality of rubber strips all extend along the first direction and are arranged at intervals along the second direction; wherein the rubber strips are sequentially provided with a first area, a second area, and a third area from the outside to the inside, wherein, in the thickness direction of the photovoltaic component, the thickness of the second area first increases and then decreases along the second direction.

[0023] In the present invention, multiple interconnecting strips are arranged on the surface of the battery cell, and at least part of the multiple adhesive strips are arranged in a partial area of ​​the multiple interconnecting strips away from the battery cell, so that the multiple interconnecting strips are fixed to the surface of the battery cell through the multiple adhesive strips.

[0024] Furthermore, the adhesive strip in the utility model has a first region, a second region and a third region from the outside to the inside. Along the thickness direction of the photovoltaic module, the thickness of the second region is set to first increase and then decrease along the second direction. This can prevent the second region of the adhesive strip from being damaged, causing the first adhesive film or the second adhesive film to flow from the damaged part of the second region to between the interconnection strip and the battery cell, causing a short circuit in the photovoltaic module.

[0025] In addition, along the thickness direction of the photovoltaic module, the thickness of the second region is set to increase first and then decrease along the second direction, so as to avoid the second region being too thick, resulting in poor adhesion between the adhesive strip and the battery cell, which affects the yield of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The cross section of the photovoltaic module in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0027] Figure 2 The cross section of the photovoltaic module in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0028] Figure 3 The cross section of the photovoltaic module in the embodiment of the utility model is shown in FIG. Figure 3 ;

[0029] Figure 4 The cross section of the photovoltaic module in another embodiment of the present invention is shown Figure 1 ;

[0030] Figure 5 The cross section of the photovoltaic module in another embodiment of the present invention is shown Figure 2 ;

[0031] Figure 6 The cross section of the photovoltaic module in another embodiment of the present invention is shown Figure 3 .

[0032] Reference numerals:

[0033] 10: Battery cell;

[0034] 20: Interconnection strip;

[0035] 30: adhesive strip; 31: first area; 32: second area; 33: third area;

[0036] 40: adhesive film; 41: first adhesive film; 42: second adhesive film;

[0037] 50: back panel;

[0038] 60: front glass;

[0039] 70: conductive part;

[0040] 80: insulation part;

[0041] A: The second direction. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the fixed scope of the utility model.

[0043] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0044] Reference Figure 1 , showing the cross section of the photovoltaic module described in the embodiment of the utility model Figure 1 ;reference Figure 2 , showing the cross section of the photovoltaic module described in the embodiment of the utility model Figure 2 ;reference Figure 3 , showing the cross section of the photovoltaic module described in the embodiment of the utility model Figure 3 ;reference Figure 4, showing a cross section of a photovoltaic module in another embodiment of the present invention Figure 1 ;reference Figure 5 , showing a cross section of a photovoltaic module in another embodiment of the present invention Figure 2 ;reference Figure 6 , showing a cross section of a photovoltaic module in another embodiment of the present invention Figure 3 .

[0045] like Figures 1 to 6 As shown, an embodiment of the utility model discloses a photovoltaic module, which includes a plurality of battery cells 10; a plurality of interconnecting bars 20, the plurality of interconnecting bars 20 connect the plurality of battery cells 10, the plurality of interconnecting bars 20 all extend along a first direction, the plurality of interconnecting bars 20 at least partially connected to each battery cell 10 are arranged at intervals along a second direction A, and the second direction A intersects with the first direction; a plurality of adhesive strips 30, at least a portion of the plurality of adhesive strips 30 are arranged in a partial area on a side of the plurality of interconnecting bars 20 away from the battery cell 10, and the plurality of adhesive strips 30 all extend along the first direction and are arranged at intervals along the second direction A; wherein the adhesive strips 30 are sequentially provided with a first area 31, a second area 32, and a third area 33 from the outside to the inside, wherein, in the thickness direction of the photovoltaic module, the thickness of the second area 32 first increases and then decreases along the second direction A.

[0046] like Figures 1 to 6 As shown, the embodiment of the utility model discloses a photovoltaic module, which includes a plurality of cells 10. As the core component of the photovoltaic module, the cell 10 can convert solar energy into electrical energy. Among them, the cell 10 has a light-receiving surface facing the sunlight, also called the front side. The cell 10 also has a backlight surface facing away from the sunlight, also called the back side.

[0047] In the embodiment of the utility model, a plurality of battery cells 10 are connected in series through a plurality of interconnecting bars 20 to form a battery string. Specifically, one end of a plurality of interconnecting bars 20 can be connected to the front of a battery cell 10, and the other end of the plurality of interconnecting bars 20 can be passed through the gap between two adjacent battery cells 10 and connected to the back of another adjacent battery cell 10, so that the two adjacent battery cells 10 are connected in series, and a plurality of battery cells 10 are connected in series in sequence to form a battery string. One end of a plurality of interconnecting bars 20 can also be connected to the back of a battery cell 10, and the other end of the plurality of interconnecting bars 20 can be extended and connected to the back of another adjacent battery cell 10, so that the two adjacent battery cells 10 are connected in series, and a plurality of battery cells 10 are connected in series in sequence to form a battery string.

[0048] In the embodiment of the utility model, there are no excessive restrictions on the specific way of connecting multiple interconnection bars 20 to multiple battery cells 10. In actual applications, technicians can choose a suitable connection method as needed. The following will take the example of one end of multiple interconnection bars 20 connected to the back of a battery cell 10, and the other end of multiple interconnection bars 20 extending and connected to the back of another adjacent battery cell 10 as an example for relevant description. In other words, the following will take the back-contact photovoltaic module as an example for relevant description.

[0049] It should be noted that the multiple interconnecting bars 20 in the embodiment of the utility model extend along the first direction and are arranged at intervals along the second direction A. When the battery cell 10 is a rectangular structure, the first direction may be the width direction of the battery cell 10, and the second direction A may be the length direction of the battery cell 10. Of course, the first direction may also be the length direction of the battery cell 10, and the second direction A may be the width direction of the battery cell 10.

[0050] like Figures 1 to 6 As shown, the multiple adhesive strips 30 in the embodiment of the utility model all extend along the first direction and are arranged at intervals along the second direction A. The multiple adhesive strips 30 are at least partially arranged in a partial area on the side of the multiple interconnecting strips 20 away from the battery cell 10, so as to fix the multiple interconnecting strips 20 to the surface of the battery cell 10 through the multiple adhesive strips 30. Specifically, each adhesive strip 30 can be arranged corresponding to an interconnecting strip 20, that is, an interconnecting strip 20 is fixed to the surface of a battery cell 10 through an adhesive strip 30. Of course, one or more interconnecting strips 20 can also be fixed to the surfaces of multiple battery cells 10 through an adhesive strip 30. In this regard, in the embodiment of the utility model, there are no excessive restrictions. In actual applications, technicians can set it as needed.

[0051] The interconnection bar 20 in the embodiment of the utility model has a lower portion abutting against the cell sheet 10, an upper portion arranged opposite to the lower portion along the thickness direction of the photovoltaic module, and a middle portion located between the lower portion and the upper portion. In the thickness direction of the photovoltaic module, the side surface of the interconnection bar 20 has an upper half portion close to the upper portion and a lower half portion close to the lower portion.

[0052] like Figures 1 to 6As shown, in the extension direction of the photovoltaic module, the adhesive strip 30 is sequentially provided with a first area 31, a second area 32 and a third area 33 from the outside to the inside. Among them, the first area 31 is an area that at least partially contacts the surface of the battery cell 10. The second area 32 is an area that covers the side surface of the middle part of the interconnection bar 20. The third area 33 is an area that covers the upper surface of the interconnection bar 20. The orthographic projection of the boundary line of the first area 31 and the second area 32 on the plane where the battery cell 10 is located is located on the surface of the battery cell 10, and / or the conductive part 70 is away from the surface of the battery cell 10, and / or the insulating part 80 is away from the surface of the battery cell 10. The orthographic projection of the boundary line of the second area 32 and the third area 33 on the plane parallel to the plane where the battery cell 10 is located is located on the upper part of the interconnection bar 20.

[0053] like Figures 1 to 6 As shown, in the thickness direction of the photovoltaic module, the thickness of the second region 32 first increases and then decreases along the second direction A. This can prevent the second region 32 of the adhesive strip 30 from being damaged, causing the first adhesive film 41 or the second adhesive film 42 to flow from the damaged part of the second region 32 to between the interconnection strip 20 and the battery cell 10, causing a short circuit in the photovoltaic module.

[0054] In actual applications, the first adhesive film 41 or the second adhesive film 42 entering between the lower part of the interconnection bar 20 and the battery cell 10 is more likely to cause a short circuit in the photovoltaic module. Therefore, in the embodiment of the utility model, the thickness of the second area 32 close to the first area 31 is set to be thicker than the thickness of the second area 32 close to the third area 33. The thickness of the second area 32 increases first and then decreases along the second direction A, so as to ensure that the thickness of the second area 32 coated on the side surface of the middle part of the interconnection bar 20 increases first and then decreases. In other words, the thickness of the second area 32 coated on the lower half of the side surface of the middle area of ​​the interconnection bar 20 is thicker, while the thickness of the second area 32 coated on the upper half of the side surface of the middle area of ​​the interconnection bar 20 is thinner, so that the second area 32 has a stronger anti-puncture ability, which can effectively avoid the short circuit caused by the damage of the adhesive strip 30.

[0055] Furthermore, along the thickness direction of the photovoltaic module, the thickness of the second region 32 is set to first increase and then decrease along the second direction A. It is difficult for the first adhesive film 41 or the second adhesive film 42 to enter between the interconnection bar 20 and the battery cell 10 through the second region 32 coated on the upper half of the side surface of the middle part of the interconnection bar 20. Therefore, in the embodiment of the utility model, the thickness of the second area 32 coated on the upper half of the side surface of the middle part of the interconnection bar 20 is set to be smaller than the thickness of the second area 32 coated on the lower half of the side surface of the middle area of ​​the interconnection bar 20, so as to thin the thickness of the second area 32 coated on the upper half of the side surface of the middle area of ​​the interconnection bar 20. The thickness of the second area 32 is set differently, so as to avoid the second area 32 coated on the upper half of the side surface of the middle area of ​​the interconnection bar 20 and the second area 32 coated on the lower half of the side surface of the middle area of ​​the interconnection bar 20 having the same thickness, which would cause the second area 32 coated on the upper half of the side surface of the middle area of ​​the interconnection bar 20 to be too thick, resulting in poor adhesion between the adhesive strip 30 and the battery cell 10, affecting the yield of the photovoltaic module.

[0056] Alternatively, if Figures 1 to 6 As shown, in the embodiment of the utility model, the second region 32 has a first side connected to the first region 31 and a second side connected to the third region 33, wherein, in the thickness direction of the photovoltaic component, the thickness of the first side is equal to the thickness of the side of the first region 31 connected to the first side, and the thickness of the second side is equal to the thickness of the side of the third region 33 connected to the second side.

[0057] like Figures 1 to 6 As shown, the second region 32 has a first side connected to the first region 31 and a second side connected to the third region 33. The first side and the second side are opposite sides.

[0058] In the thickness direction of the photovoltaic module, the thickness of the first side is set to be equal to the thickness of the side edge of the first region 31 connected to the first side, so that the transition between the first region 31 and the second region 32 is smoother, and damage is avoided at the connection between the first region 31 and the second region 32, which causes the first adhesive film 41 or the second adhesive film 42 to flow from the damaged part to between the interconnection bar 20 and the battery cell 10, resulting in a short circuit in the photovoltaic module.

[0059] In the thickness direction of the photovoltaic module, the thickness of the second side is set to be equal to the thickness of the side edge of the third region 33 connected to the second side. This makes the transition between the third region 33 and the second region 32 smoother, and avoids damage at the connection between the third region 33 and the second region 32. This causes the first adhesive film 41 or the second adhesive film 42 to flow from the damaged part to between the interconnection bar 20 and the battery cell 10, resulting in a short circuit in the photovoltaic module.

[0060] Of course, the above are only individual examples of the embodiments of the present invention and are not intended to be limiting of the present invention. In actual applications, in the thickness direction of the photovoltaic module, the thickness of the first side may be set to be slightly smaller than or slightly larger than the thickness of the side of the first region 31 connected to the first side. Similarly, in the thickness direction of the photovoltaic module, the thickness of the second side may be set to be slightly smaller than or slightly larger than the thickness of the side of the third region 33 connected to the second side.

[0061] Alternatively, if Figures 1 to 6 As shown, in the thickness direction of the photovoltaic module, the thickness of the first region 31 is greater than the thickness of the third region 33 .

[0062] like Figures 1 to 6 As shown, in the embodiment of the utility model, in the thickness direction of the photovoltaic module, the thickness of the first region 31 is set to be greater than the thickness of the third region 33. So that the first region 31 is thick enough and has sufficient tensile strength to improve the reliability of the connection between the first region 31 and the battery cell 10. It should be noted that the thickness of the first region 31 can be set to be the same in the thickness direction of the module along the second direction, and the thickness of the first region 31 can also decrease from the inside to the outside in the thickness direction of the module along the second direction, because the tensile strength required inside the first region 31 is stronger than that of the outside.

[0063] Furthermore, the thickness of the third region 33 is set to be smaller than the thickness of the first region 31 to prevent the third region 33 from being too thick, which would result in poor adhesion between the adhesive strip 30 and the cell 10 and affect the yield of the photovoltaic module.

[0064] Alternatively, if Figures 1 to 6 As shown, the photovoltaic module disclosed in the embodiment of the utility model also includes an adhesive film 40, which is stacked on the side of the adhesive strip 30 away from the battery cell 10; in the thickness direction of the photovoltaic module, the thickness of the second area 32 and the thickness of the adhesive film 40 corresponding to the second area 32 have a first ratio, and along the second direction A, the first ratio first increases and then decreases.

[0065] like Figures 1 to 6 As shown, an adhesive film 40 is disposed on the side of the adhesive strip 30 away from the battery cell 10 , and the back plate 50 is adhered to the back side of the battery cell 10 through the adhesive film 40 , so that the battery cell 10 is supported by the back plate 50 .

[0066] It should be noted that the adhesive film 40 in the embodiment of the utility model refers to the first adhesive film 41, that is, the back plate 50 is bonded to the back of the battery cell 10 through the first adhesive film 41. In actual applications, the adhesive film 40 also includes a second adhesive film 42, and the front glass is bonded to the front of the battery cell 10 through the second adhesive film 42.

[0067] In the thickness direction of the photovoltaic module, there is a ratio between the thickness of the second region 32 and the thickness of the first adhesive film 41 corresponding to the second region 32, and this ratio is referred to as the first ratio. Along the second direction A, the first ratio first increases and then decreases. This is to prevent the second region 32 from being damaged, causing the first adhesive film 41 to flow from the damaged part of the second region 32 to between the interconnection strip 20 and the battery cell 10, causing a short circuit in the photovoltaic module. Furthermore, along the second direction A, setting the first ratio to increase first and then decrease can also prevent the second region 32 from being too thick, resulting in poor adhesion between the adhesive strip 30 and the battery cell 10, affecting the yield of the photovoltaic module.

[0068] Optionally, the first ratio is greater than or equal to 10% and less than or equal to 40%.

[0069] In the embodiment of the utility model, the first ratio between the thickness of the second region 32 and the thickness of the first adhesive film 41 corresponding to the second region 32 is set to be greater than or equal to 10% and less than or equal to 40%. This makes the thickness of the second region 32 more appropriate, and avoids the second region 32 being too thin and being damaged during the processing of the photovoltaic module, causing the first adhesive film 41 to flow from the damaged part of the second region 32 to between the interconnection bar 20 and the battery cell 10, causing a short circuit in the photovoltaic module.

[0070] Furthermore, it is also possible to avoid the second region 32 being too thick, which would result in poor adhesion between the adhesive strip 30 and the cell 10 and affect the yield of the photovoltaic module. In addition, if the second region 32 is too thick, the cost of the photovoltaic module will also increase.

[0071] Exemplarily, the first ratio between the thickness of the second region 32 and the thickness of the first adhesive film 41 corresponding to the second region 32 may be set to 10%, 15%, 20%, 25%, 30%, 35%, 40%, etc.

[0072] Preferably, the first ratio is greater than or equal to 20% and less than or equal to 30%.

[0073] As a preferred implementation, in the embodiment of the utility model, the first ratio between the thickness of the second area 32 and the thickness of the first adhesive film 41 corresponding to the second area 32 is set to be greater than or equal to 20% and less than or equal to 30%.

[0074] Exemplarily, the first ratio between the thickness of the second region 32 and the thickness of the first adhesive film 41 corresponding to the second region 32 may be set to 20%, 22%, 24%, 26%, 28%, 30%, or the like.

[0075] Optionally, in the thickness direction of the photovoltaic module, the thickness of the first region 31 and the thickness of the adhesive film 40 corresponding to the first region 31 have a second ratio, and the second ratio is greater than or equal to 10% and less than or equal to 40%.

[0076] In the thickness direction of the photovoltaic module, there is a ratio between the thickness of the first region 31 and the thickness of the first adhesive film 41 corresponding to the first region 31, and the ratio is referred to as the second ratio. In the embodiment of the utility model, the second ratio is set to be greater than or equal to 10% and less than or equal to 40%. In order to make the thickness of the first region 31 more appropriate, the adhesive strip 30 can more reliably connect the interconnection strip 20 to the surface of the battery cell 10. Avoid the first region 31 being too thin, causing the adhesive strip 30 to detach from the surface of the battery cell 10, affecting the reliability of the connection between the interconnection strip 20 and the battery cell 10. Furthermore, it can also avoid the first region 31 being too thick, which increases the cost of the photovoltaic module.

[0077] Exemplarily, in the embodiment of the utility model, the second ratio between the thickness of the first region 31 and the thickness of the first adhesive film 41 corresponding to the first region 31 can be set to 10%, 15%, 20%, 25%, 30%, 35%, 40%, etc.

[0078] Optionally, in the thickness direction of the photovoltaic module, the thickness of the third region 33 and the thickness of the adhesive film 40 corresponding to the third region 33 have a third ratio, and the third ratio is greater than or equal to 10% and less than or equal to 60%.

[0079] In the thickness direction of the photovoltaic module, there is a ratio between the thickness of the third region 33 and the thickness of the first adhesive film 41 corresponding to the third region 33, and the ratio is referred to as the third ratio. In the embodiment of the utility model, the third ratio is set to be greater than or equal to 10% and less than or equal to 60%. In order to make the thickness of the third region more appropriate, the adhesive strip 30 can more reliably connect the interconnection strip 20 to the surface of the battery cell 10. Avoid the third region 33 being too thin, resulting in damage to the third region 33, affecting the reliability of the connection between the interconnection strip 20 and the battery cell 10. Furthermore, it can also avoid the third region 33 being too thick, which increases the cost of the photovoltaic module.

[0080] Exemplarily, in the embodiment of the utility model, the third ratio between the thickness of the third region 33 and the thickness of the first adhesive film 41 corresponding to the third region 33 can be set to 10%, 20%, 30%, 40%, 50%, 60%, etc.

[0081] Alternatively, if Figures 1 to 6 As shown, in the thickness direction of the photovoltaic module, the second region 32 has a maximum thickness, and the maximum thickness is tangent to the outermost side of the interconnection strip 20 along the second direction A.

[0082] like Figures 1 to 6 As shown, in the thickness direction of the photovoltaic module, the maximum thickness of the second region 32 is set to be tangent to the outermost side of the interconnection bar 20 along the second direction A. This makes the thickness variation of the second region 32 more reasonable, and the fit between the second region 32 and the interconnection bar 20 better. Furthermore, it can also prevent the second region 32 from being damaged, causing the first adhesive film 41 to flow from the damaged part of the second region 32 to between the interconnection bar 20 and the battery cell 10, causing a short circuit in the photovoltaic module.

[0083] Alternatively, if Figures 1 to 6 As shown, along the second direction A, the width of the interconnection strip 20 is K, and the width of a single first region 31 is a, satisfying K≤a≤2K; and / or, along the second direction A, the gap between two adjacent interconnection strips 20 is L, satisfying 0.5mm≤a≤L / 2.

[0084] like Figures 1 to 6 As shown, in the embodiment of the utility model, along the second direction A, the width of the interconnection bar 20 is set to K, and the width of the single first area 31 is set to a. Along the second direction A, the width a of the single first area 31 is greater than or equal to the width K of the interconnection bar 20 and less than or equal to 2 times the width K of the interconnection bar 20. In order to make the width of the single first area 31 more appropriate, it can reliably connect the adhesive strip 30 to the surface of the battery cell 10.

[0085] For example, along the second direction A, the width a of a single first region 31 may be set equal to the width K of the interconnection bar 20, the width a of a single first region 31 may be set equal to 1.5 times the width K of the interconnection bar 20, or the width a of a single first region 31 may be set equal to 2 times the width K of the interconnection bar 20. It should be noted that, along the second direction A, each interconnection bar 20 has two first regions 31, one first region 31 is located on one side of the corresponding interconnection bar 20, and the other first region 31 is located on the other side of the corresponding interconnection bar 20.

[0086] like Figures 1 to 6 As shown, in the embodiment of the utility model, along the second direction A, the width of the gap between two adjacent interconnecting strips 20 is set to L. Among them, the width a of a single first region 31 is greater than or equal to 0.5 mm and less than or equal to L / 2. In order to make the width of a single first region 31 more appropriate, it can reliably connect the adhesive strip 30 to the surface of the battery cell 10. In addition, along the second direction A, two adjacent adhesive strips 30 do not overlap.

[0087] Optionally, along the first direction, the distance between the end of the adhesive strip 30 closest to the edge of the photovoltaic module and the end of the adhesive film 40 close to the same edge of the photovoltaic module is greater than or equal to 10 mm.

[0088] In the embodiment of the utility model, along the first direction, the distance between the end of the adhesive strip 30 closest to the edge of the photovoltaic module and the end of the adhesive film 40 closest to the same edge of the photovoltaic module is set to be greater than or equal to 10 mm, so as to improve the reliability of the photovoltaic module and avoid the adhesive strip 30 flowing out of the edge of the photovoltaic module during the lamination process of the photovoltaic module, thereby affecting the reliability of the photovoltaic module.

[0089] Exemplarily, along the first direction, the distance between the end of the adhesive strip 30 closest to the edge of the photovoltaic component and the end of the adhesive film 40 close to the same edge of the photovoltaic component can be set to 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, etc.

[0090] Optionally, the cross section of the interconnection bar 20 is one of a circular structure, a square structure, a rectangular structure, a triangular structure, a pentagonal structure and a quasi-rectangular structure.

[0091] like Figures 4 to 6 As shown, in the embodiment of the present invention, the cross section of the interconnection bar 20 may be a circular structure. Figures 1 to 3 As shown, the cross section of the interconnection bar 20 in the embodiment of the utility model can be a rectangular structure. The rectangular structure can be a rectangle with rounded corners. Alternatively, the rectangular structure can be a rectangular structure with two opposite sides being arc-shaped.

[0092] In the embodiment of the utility model, the cross section of the interconnection bar 20 can also be a square structure, a rectangular structure, a triangular structure, a pentagonal structure, a hexagonal structure, etc. Of course, the above are examples of specific structures of the cross section of the interconnection bar 20, and are not intended to limit the utility model. In actual applications, technicians can also set the specific structure of the cross section of the interconnection bar 20 as needed.

[0093] Optionally, in the thickness direction of the photovoltaic module, the thickness of the adhesive strip 30 is greater than or equal to 0.02 mm and less than or equal to 0.7 mm.

[0094] In the embodiment of the utility model, the thickness of the adhesive strip 30 is set to be greater than or equal to 0.02 mm and less than or equal to 0.7 mm in the thickness direction of the photovoltaic module. To avoid the adhesive strip 30 from being damaged, the first adhesive film 41 flows from the damaged part of the adhesive strip 30 to between the interconnection strip 20 and the battery cell 10, causing a short circuit in the photovoltaic module. Furthermore, it is also possible to avoid the adhesive strip 30 being too thick, the adhesive strip 30 and the battery cell 10 having a poor fit, and affecting the yield of the photovoltaic module.

[0095] For example, in the thickness direction of the photovoltaic module, the thickness of the adhesive strip 30 can be set to 0.02 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, etc.

[0096] Alternatively, if Figures 1 to 3 As shown, when the cross-section of the interconnection bar 20 is a square structure, a rectangular structure or a quasi-rectangular structure, in the thickness direction of the photovoltaic module, the thickness of the second region 32 is greater than or equal to 0.02 mm and less than or equal to 0.7 mm; and / or, the thickness of the first region 31 is greater than or equal to 0.05 mm and less than or equal to 0.2 mm; and / or, the thickness of the third region 33 is greater than or equal to 0.02 mm and less than or equal to 0.1 mm; and / or, along the second direction A, the width of the third region 33 is greater than or equal to 0.2 mm and less than or equal to 4 mm.

[0097] like Figures 1 to 3 As shown, the cross section of the interconnection bar 20 may be a square structure, a rectangular structure, or a quasi-rectangular structure. When the cross section of the interconnection bar 20 is a square structure, a rectangular structure, or a quasi-rectangular structure, the thickness of the second region 32 is set to be greater than or equal to 0.02 mm and less than or equal to 0.7 mm. For example, the thickness of the second region 32 may be 0.02 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, etc.

[0098] When the cross section of the interconnection strip 20 is a square structure, a rectangular structure, or a quasi-rectangular structure, the thickness of the first region 31 is set to be greater than or equal to 0.05 mm and less than or equal to 0.2 mm. For example, the thickness of the first region 31 can be 0.05 mm, 0.08 mm, 0.1 mm, 0.13 mm, 0.15 mm, 0.18 mm, 0.2 mm, etc.

[0099] When the cross section of the interconnection strip 20 is a square structure, a rectangular structure, or a quasi-rectangular structure, the thickness of the third region 33 is set to be greater than or equal to 0.02 mm and less than or equal to 0.1 mm. For example, the thickness of the third region 33 can be 0.02 mm, 0.04 mm, 0.06 mm, 0.08 mm, 0.1 mm, etc.

[0100] When the cross section of the interconnection strip 20 is a square structure, a rectangular structure, or a quasi-rectangular structure, the width of the third region 33 is set to be greater than or equal to 0.2 mm and less than or equal to 4 mm along the second direction A. For example, along the second direction A, the width of the third region 33 may be 0.2 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, etc.

[0101] Alternatively, if Figures 4 to 6 As shown, in the case where the cross-section of the interconnection strip 20 is a circular structure, the thickness of the second region 32 is greater than or equal to 0.02 mm and less than or equal to 0.4 mm; and / or, the thickness of the first region 31 is greater than or equal to 0.05 mm and less than or equal to 0.2 mm; and / or, the thickness of the third region 33 is greater than or equal to 0.02 mm and less than or equal to 0.1 mm; and / or, along the second direction A, the width of the third region 33 is greater than or equal to 0.1 mm and less than or equal to 0.4 mm.

[0102] like Figures 4 to 6 As shown, the cross section of the interconnection bar 20 may also be a circular structure. In the case where the cross section of the interconnection bar 20 is a circular structure, the thickness of the second region 32 is set to be greater than or equal to 0.02 mm and less than or equal to 0.4 mm. For example, the thickness of the second region 32 may be 0.02 mm, 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, etc.

[0103] When the cross section of the interconnection bar 20 is a circular structure, the thickness of the first region 31 is set to be greater than or equal to 0.05 mm and less than or equal to 0.2 mm. For example, the thickness of the first region 31 can be 0.05 mm, 0.08 mm, 0.1 mm, 0.13 mm, 0.15 mm, 0.18 mm, 0.2 mm, etc.

[0104] When the cross section of the interconnection bar 20 is a circular structure, the thickness of the third region 33 is set to be greater than or equal to 0.02 mm and less than or equal to 0.1 mm. For example, the thickness of the third region 33 can be 0.02 mm, 0.04 mm, 0.06 mm, 0.08 mm, 0.1 mm, etc.

[0105] When the cross section of the interconnection bar 20 is a circular structure, the width of the third region 33 is set to be greater than or equal to 0.1 mm and less than or equal to 0.4 mm along the second direction A. For example, along the second direction A, the width of the third region 33 may be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, etc.

[0106] Alternatively, if Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, in the embodiment of the utility model, the photovoltaic module further includes a conductive part 70, which is arranged between the interconnection bar 20 and the battery cell 10; and / or, the photovoltaic module further includes an insulating part 80, which is also arranged between the interconnection bar 20 and the battery cell 10. The insulating part 80 and the conductive part 70 are arranged at intervals along the first direction.

[0107] In the embodiment of the utility model, a conductive portion 70 is disposed between the interconnection bar 20 and the battery cell 10 , so as to improve the reliability of the electrical connection between the interconnection bar 20 and the battery cell 10 through the conductive portion 70 .

[0108] Exemplarily, the conductive part 70 may include a plurality of conductive parts 70, and the plurality of conductive parts 70 are arranged at intervals along the extension direction of the interconnection bar 20, that is, the first direction, so as to improve the reliability of the electrical connection between the interconnection bar 20 and the battery cell 10 through the plurality of conductive parts 70. Alternatively, each conductive part 70 is extended along the extension direction of the interconnection bar 20, and at least part of the conductive parts 70 are arranged at intervals along the direction intersecting the extension direction of the interconnection bar 20, so as to improve the reliability of the electrical connection between the interconnection bar 20 and the battery cell 10 through the conductive parts 70.

[0109] It should be noted that the conductive part 70 in the embodiment of the utility model can be a pad structure or a gate line structure. When the conductive part 70 is a pad structure, a plurality of pad structures are usually arranged at intervals along the extension direction of the interconnection bar 20, that is, the first direction. Exemplarily, when the battery cell is a back-contact battery cell, the insulating part 80 and the conductive part 70 are arranged at intervals along the extension direction of the interconnection bar 20, that is, the first direction. Among them, the insulating part 80 and the conductive part 70 can both include a plurality, and the plurality of conductive parts 70 and the plurality of insulating parts 80 are arranged alternately along the first direction. Along the extension direction of the interconnection bar 20, two adjacent pad structures can be connected by a gate line, and a gate line may not be set between two adjacent pad structures.

[0110] When the conductive part 70 is a grid line structure, a plurality of grid line structures can be arranged at intervals along the extension direction of the interconnection bar 20, or each grid line can be extended along the extension direction of the interconnection bar 20 and arranged at intervals along the direction intersecting the extension direction of the interconnection bar 20. When the battery cell is a back-contact battery cell, the insulating part 80 can be arranged according to actual conditions. For example, the insulating part 80 can be distributed at the ends of the anisotropic fine grid lines on both sides of the main grid line extending along the extension direction of the interconnection bar 20, or can be distributed on the surface of the main grid line extending along the extension direction of the interconnection bar 20. Of course, the above is only an example of the specific structure and arrangement of the conductive part 70 and the insulating part 80, and is not intended to be a limitation of the present utility model. In actual applications, technicians can set the specific structure and arrangement of the conductive part 70 and the insulating part 80 as needed.

[0111] In addition, the multiple conductive parts 70 in the embodiment of the utility model are arranged at intervals along the extension direction of the interconnection bar 20. The reason for arranging the multiple conductive parts 70 at intervals along the extension direction of the interconnection bar 20 is to avoid the conductive parts 70 from being too large in area, shading the surface of the cell 10, thereby affecting the photoelectric conversion efficiency of the cell 10. Moreover, if the conductive parts 70 are too large in area, the warping of the cell 10 will be aggravated.

[0112] In the embodiment of the utility model, a plurality of conductive parts 70 are arranged at intervals along the extension direction of the interconnection bar 20, and an opposite-sex grid line is provided between two adjacent conductive parts 70, so as to avoid short circuit in the photovoltaic module.

[0113] In the embodiment of the utility model, an insulating part 80 may be provided between the interconnection member 20 and the cell 10, and the insulating part 80 may also include a plurality of insulating parts, and a plurality of conductive parts 70 and a plurality of insulating parts 80 may be alternately provided along the extension direction of the interconnection bar 20. This effectively avoids the problem of short circuit of the photovoltaic module caused by the overlap of the interconnection bar 20 and the opposite-sex grid line in the back contact cell.

[0114] The embodiment of the utility model further discloses a photovoltaic system, which includes the photovoltaic assembly described in the above embodiment.

[0115] It should be noted that the photovoltaic assembly described in the embodiment of the present utility model has the same structure as the photovoltaic assembly described in the above embodiment, and its beneficial effects are also similar, which will not be described in detail here.

[0116] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0117] Although the optional embodiments of the utility model embodiments have been described, those skilled in the art, once knowing the basic creative concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including optional embodiments and all changes and modifications falling within the scope of the utility model embodiments.

[0118] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the article or terminal device including the elements.

[0119] The technical solution provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the present invention. At the same time, for those skilled in the art, according to the principle and implementation method of the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A photovoltaic module, characterized in that: include: Multiple battery cells; A plurality of interconnection bars, the plurality of interconnection bars connect the plurality of battery cells, the plurality of interconnection bars extend along a first direction, the plurality of interconnection bars at least partially connected to each of the battery cells are arranged at intervals along a second direction, and the second direction intersects the first direction; A plurality of adhesive strips, at least part of which is disposed in a partial area of ​​a side of the plurality of interconnecting strips away from the battery sheet, and the plurality of adhesive strips all extend along the first direction and are arranged at intervals along the second direction; The rubber strip is provided with a first region, a second region and a third region in sequence from the outside to the inside, wherein in the thickness direction of the photovoltaic component, the thickness of the second region first increases and then decreases along the second direction.

2. The photovoltaic module according to claim 1, characterized in that: The second region has a first side connected to the first region and a second side connected to the third region, wherein In the thickness direction of the photovoltaic component, the thickness of the first side is equal to the thickness of the side of the first region connected to the first side, and the thickness of the second side is equal to the thickness of the side of the third region connected to the second side.

3. The photovoltaic module according to claim 1, characterized in that: In the thickness direction of the photovoltaic component, the thickness of the first region is greater than the thickness of the third region.

4. The photovoltaic module according to claim 1, characterized in that: The photovoltaic module further comprises an adhesive film, which is stacked on a side of the adhesive strip away from the battery sheet; In the thickness direction of the photovoltaic component, the thickness of the second region and the thickness of the adhesive film corresponding to the second region have a first ratio, and along the second direction, the first ratio first increases and then decreases.

5. The photovoltaic module according to claim 4, characterized in that: The first ratio is greater than or equal to 10% and less than or equal to 40%.

6. The photovoltaic module according to claim 4, characterized in that: In the thickness direction of the photovoltaic module, the thickness of the first region and the thickness of the adhesive film corresponding to the first region have a second ratio, and the second ratio is greater than or equal to 10% and less than or equal to 40%; And / or, in the thickness direction of the photovoltaic module, the thickness of the third region and the thickness of the adhesive film corresponding to the third region have a third ratio, and the third ratio is greater than or equal to 10% and less than or equal to 60%.

7. The photovoltaic module according to claim 1, characterized in that: In the thickness direction of the photovoltaic module, the second region has a maximum thickness, and the maximum thickness is tangent to the outermost side of the interconnection strip along the second direction.

8. The photovoltaic module according to claim 1, characterized in that: Along the second direction, the width of the interconnection strip is K, the width of a single first region is a, and K≤a≤2K is satisfied; And / or, along the second direction, a gap between two adjacent interconnecting strips is L, satisfying 0.5 mm ≤ a ≤ L / 2.

9. The photovoltaic module according to claim 4, characterized in that: Along the first direction, a distance between an end of the adhesive strip closest to an edge of the photovoltaic component and an end of the adhesive film close to the same edge of the photovoltaic component is greater than or equal to 10 mm.

10. The photovoltaic module according to claim 1, characterized in that: In the thickness direction of the photovoltaic module, the thickness of the adhesive strip is greater than or equal to 0.02 mm and less than or equal to 0.7 mm.

11. The photovoltaic module according to claim 1, characterized in that: The cross section of the interconnection strip is one of a circular structure, a square structure, a rectangular structure, a triangular structure, a pentagonal structure and a quasi-rectangular structure.

12. The photovoltaic module according to claim 11, characterized in that: When the cross section of the interconnection bar is a square structure, a rectangular structure, or a quasi-rectangular structure, in the thickness direction of the photovoltaic module, the thickness of the second region is greater than or equal to 0.02 mm and less than or equal to 0.7 mm; and / or, the thickness of the first region is greater than or equal to 0.05 mm and less than or equal to 0.2 mm; and / or, the thickness of the third region is greater than or equal to 0.02 mm and less than or equal to 0.1 mm; And / or, along the second direction, a width of the third region is greater than or equal to 0.2 mm and less than or equal to 4 mm.

13. The photovoltaic module according to claim 11, characterized in that: When the cross section of the interconnection strip is a circular structure, the thickness of the second region is greater than or equal to 0.02 mm and less than or equal to 0.4 mm; and / or, the thickness of the first region is greater than or equal to 0.05 mm and less than or equal to 0.2 mm; and / or, the thickness of the third region is greater than or equal to 0.02 mm and less than or equal to 0.1 mm; And / or, along the second direction, a width of the third region is greater than or equal to 0.1 mm and less than or equal to 0.4 mm.

14. The photovoltaic module according to claim 1, characterized in that: The photovoltaic module further comprises a conductive portion, and the conductive portion is arranged between the interconnection bar and the battery sheet; And / or, the photovoltaic module further includes an insulating portion, and the insulating portion is arranged between the interconnection bar and the battery cell.

15. A photovoltaic system, characterized in that: The invention comprises a photovoltaic module as claimed in any one of claims 1 to 14.

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