A photovoltaic module

Abstract

The utility model discloses a photovoltaic module, belonging to the technical field of photovoltaic modules, the photovoltaic module comprises: a plurality of battery cells; a plurality of interconnecting strips, the plurality of interconnecting strips all extend along a first direction, the plurality of interconnecting strips connect the plurality of battery cells, the plurality of interconnecting strips at least partially connected to each battery cell are arranged at intervals along a second direction; a plurality of adhesive strips, the plurality of adhesive strips all extend along a first direction, the plurality of adhesive strips install the plurality of interconnecting strips on the battery cells, the plurality of adhesive strips at least partially installed on each battery cell are arranged at intervals along a second direction; a conductive part and an insulating part, the conductive part and the insulating part are arranged between the battery cell and the interconnecting strips; wherein the second direction intersects with the first direction. The utility model can reduce the amount of adhesive strips used, reduce the shielding of the battery cell by the adhesive strips, reduce the probability of bubbles between the battery cell and the adhesive strips, and improve the yield of the photovoltaic module.

Description

Technical Field

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

[0002] The cell string is the core component of the photovoltaic module, which can convert solar energy into electrical energy. The cell string usually includes multiple cells, and two adjacent cells are arranged at intervals. One end of the multiple welding ribbons is laid on the surface of a cell, and the other end of the multiple welding ribbons is extended to the surface of another adjacent cell, so that the two adjacent cells are connected in series through the multiple welding ribbons to collect the current generated by the cell.

[0003] In the prior art, a whole piece of adhesive film is usually laid on the side of the multiple welding ribbons away from the battery cell. After lamination, the multiple welding ribbons are fixed to the surface of the battery cell through the whole piece of adhesive film to collect the current generated by the battery cell.

[0004] However, the method of fixing multiple welding strips on the surface of the cell by a whole piece of adhesive film has the problem of large amount of adhesive film used and high cost of photovoltaic modules. The adhesive film covers most of the surface of the cell, affecting the photoelectric conversion efficiency of the cell. In addition, there are bubbles between the adhesive film and the cell, which affects the yield of the photovoltaic module. Utility Model Content

[0005] The utility model discloses a photovoltaic module to solve or at least partially solve the problems existing in the prior art of fixing multiple welding strips on the surface of a cell by a whole piece of adhesive film, such as high cost of photovoltaic modules, blocking the surface of the cell and affecting the low photoelectric conversion efficiency and poor yield. In order to solve the above technical problems, the utility model is implemented as follows:

[0006] In a first aspect, the utility model discloses a photovoltaic module, comprising: a plurality of battery cells; a plurality of interconnecting strips, the plurality of interconnecting strips all extending along a first direction, the plurality of interconnecting strips connecting the plurality of battery cells, the plurality of interconnecting strips at least partially connected to each of the battery cells are arranged at intervals along a second direction; a plurality of adhesive strips, the plurality of adhesive strips all extending along a first direction, the plurality of adhesive strips installing the plurality of interconnecting strips on the battery cells, the plurality of adhesive strips at least partially installed on each of the battery cells are arranged at intervals along a second direction; wherein the second direction intersects with the first direction; along the second direction, the width of the interconnecting strips is a, the interconnecting strips closest to the outer side of the battery cell are closest to the outer side of the battery cell The distance between the edges of the battery cell is M; the multiple rubber strips include a first rubber strip, the first rubber strip at least partially covers the interconnection strip closest to the outer side of the battery cell, and along the second direction, the width of the first rubber strip is b1, satisfying 3a≤b1≤M, wherein the units of a, b1 and M are all mm; and / or, along the second direction, the width of the interconnection strip is a, and the gap between two adjacent interconnection strips is L; the multiple rubber strips include a second rubber strip, the second rubber strip at least partially covers the interconnection strip that is not located closest to the outer side of the battery cell, and along the second direction, the width of the second rubber strip is b2, satisfying 3a≤b2≤L, wherein the units of a, b2 and L are all mm.

[0007] Optionally, the photovoltaic module further includes: a conductive part and an insulating part, wherein the conductive part and the insulating part are arranged between the battery cell and the interconnection strip; and / or the shrinkage rate of the rubber strip along the first direction is greater than 0 and less than or equal to 2%; and / or the battery cell is a back-contact solar cell cell; and / or the projection of the rubber strip on the plane where the battery cell is located falls into the battery cell; along the first direction, the width of the battery cell is f, and the length of the rubber strip is c, satisfying c≤f, and the units of c and f are both mm.

[0008] Optionally, the battery cells include n battery cells, and the n battery cells are arranged along the first direction; along the first direction, the width of each battery cell is f, the gap between two adjacent battery cells is x, the length of the rubber strip is d, satisfying d≤g*f+(g-1)*x, x is greater than or equal to 0mm, the units of d, f and x are all mm, g is a length parameter, and g is a positive integer greater than or equal to 2, g∈[2, 3, 4, ..., n], and n is a positive integer greater than or equal to 2.

[0009] Optionally, along the first direction, the distance between the end of the insulating part closest to the side edge of the cell and the corresponding side edge of the cell is r, satisfying r≥0, with the unit of r being mm; and / or, along the first direction, the distance between the end of the conductive part closest to the side edge of the cell and the corresponding side edge of the cell is u, satisfying: 2mm≤u≤10mm.

[0010] Optionally, along the first direction, the distance between the end of the interconnection bar and the corresponding side edge of the cell is t, where t is not equal to 0mm; the distance between the end of the adhesive strip and the corresponding side edge of the cell is s, satisfying: 0≤s≤t - 1, with the units of both s and t being mm.

[0011] Optionally, along the first direction, the distance between the end of the interconnection bar and the corresponding side edge of the cell is t, where t is not equal to 0mm; the distance between the end of the conductive part closest to the side edge of the cell and the corresponding side edge of the cell is u, satisfying: u≥t + 0.5.

[0012] Optionally, the distance between the end of the adhesive strip and the corresponding side edge of the cell is s, satisfying: r≤s; or, s < u.

[0013] Optionally, along the second direction, the width of the conductive part is p, satisfying: a - 0.2≤p≤a + 1, with the unit of p being mm; and / or, along the second direction, the width of the insulating part is q, satisfying: 2a≤q≤5a, with the unit of q being mm.

[0014] Optionally, p < b1; and / or, p < b2.

[0015] In a second aspect, the present invention discloses a photovoltaic system, including the photovoltaic module described in any one of the above.

[0016] The utility model discloses a photovoltaic assembly, comprising a plurality of battery cells, a plurality of interconnecting strips and a plurality of adhesive strips, wherein the plurality of interconnecting strips extend along a first direction and are arranged at intervals on the battery cells along a second direction; the plurality of interconnecting strips connect the plurality of battery cells; the plurality of adhesive strips extend along the first direction and are arranged at intervals on the battery cells along the second direction; the plurality of interconnecting strips are installed on the battery cells by the plurality of adhesive strips, wherein the second direction intersects with the first direction; along the second direction, the width of the interconnecting strip is a, and the distance between the interconnecting strip closest to the outer side of the battery cell and the edge of the battery cell is M; the plurality of adhesive strips include a first adhesive strip, which at least partially covers the interconnecting strip closest to the outer side of the battery cell, Along the second direction, the width of the first rubber strip is b1, satisfying 3a≤b1≤M, wherein the units of a, b1 and M are all mm; and / or, along the second direction, the width of the interconnection strip is a, and the gap between two adjacent interconnection strips is L; the multiple rubber strips include a second rubber strip, and the second rubber strip at least partially covers the interconnection strip that is not located closest to the outside of the battery cell. Along the second direction, the width of the second rubber strip is b2, satisfying 3a≤b2≤L, wherein the units of a, b2 and L are all mm. This can reduce the amount of rubber strips used and reduce the shielding of the battery cell by the rubber strips, thereby reducing the cost of photovoltaic modules and improving the photoelectric conversion efficiency of photovoltaic modules.

[0017] Furthermore, during the processing of photovoltaic modules, the contact area between a single rubber strip and the battery cell is small, and the bubbles under the rubber strip can be released from around the rubber strip, reducing the probability of bubble formation, which helps to improve the yield of photovoltaic modules.

[0018] In addition, in the present invention, the conductive part and the insulating part are arranged between the cell and the interconnection strip, which can improve the reliability of the photovoltaic module and avoid the short circuit phenomenon of the cell. Moreover, during the processing of the photovoltaic module, the interconnection strip and the rubber strip can be propped up by the conductive part and the insulating part, and the bubbles can be discharged along the gap between the rubber strip and the cell. Multiple gaps are formed between multiple rubber strips and multiple cell sheets for exhaust, thereby further reducing the probability of bubbles generated between the cell and the rubber strip, reducing the shielding of the cell surface by the rubber strip, improving the photoelectric conversion efficiency of the photovoltaic module, and also improving the yield of the photovoltaic module, reducing the cost of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram showing the structure of the interconnection strips described in the embodiment of the utility model;

[0020] Figure 2 The structure diagram of the rubber strip in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 3 The structure diagram of the rubber strip in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0022] Figure 4 A schematic diagram showing a part of the structure of the interconnection strip and the battery cell in the embodiment of the utility model;

[0023] Figure 5 The structure diagram of the photovoltaic module in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0024] Figure 6 In the embodiment of the utility model Figure 5 A partial enlarged view of the photovoltaic module shown in FIG.

[0025] Figure 7 In the embodiment of the utility model Figure 5 A partial enlarged view of the photovoltaic module shown in FIG. II;

[0026] Figure 8 In the embodiment of the utility model Figure 5 A partial enlarged view of the photovoltaic module shown in III;

[0027] Fig. 9 A schematic diagram showing a partial structure of the photovoltaic module described in the embodiment of the utility model Figure 1 ;

[0028] Fig.10 The structure diagram of the photovoltaic module in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0029] Fig.11 In the embodiment of the utility model Fig.10 A partial enlarged view of the photovoltaic module shown in IV;

[0030] Fig.12 In the embodiment of the utility model Fig.10 A partial enlarged view V of the photovoltaic module shown;

[0031] Fig.13 In the embodiment of the utility model Fig.10 A partial enlarged view of the photovoltaic module shown in FIGVI;

[0032] Fig.14 A schematic diagram showing a partial structure of the photovoltaic module described in the embodiment of the utility model Figure 2 ;

[0033] Fig.15 A cross-sectional view of the photovoltaic module in the embodiment of the utility model before lamination;

[0034] Fig.16 A cross-sectional view showing the photovoltaic module described in the embodiment of the utility model after lamination;

[0035] Fig.17A schematic diagram showing the structure of a roll-shaped adhesive film in an embodiment of the utility model;

[0036] Fig.18 Schematic diagram showing the cutting method of the rubber strip in the embodiment of the utility model Figure 1 ;

[0037] Fig.19 Schematic diagram showing the cutting method of the rubber strip in the embodiment of the utility model Figure 2 ;

[0038] Fig. 20 Schematic diagram showing the cutting method of the rubber strip in the embodiment of the utility model Figure 3 .

[0039] Reference numerals:

[0040] 10: Battery cell;

[0041] 20: Interconnection strip;

[0042] 30: adhesive strip; 31: first adhesive strip; 32: second adhesive strip;

[0043] 40: conductive part;

[0044] 50: insulation part;

[0045] 60: roll film;

[0046] A: first direction; B: second direction. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] like Figures 1 to 16As shown, in the first aspect, 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 all extend along a first direction A, the plurality of interconnecting bars 20 connect the plurality of battery cells 10, and the plurality of interconnecting bars 20 at least partially connected to each battery cell 10 are arranged at intervals along a second direction B; a plurality of adhesive strips 30, the plurality of adhesive strips 30 all extend along the first direction A, the plurality of adhesive strips 30 install the plurality of interconnecting bars 20 on the battery cells 10, and the plurality of adhesive strips 30 at least partially installed on each battery cell 10 are arranged at intervals along the second direction B; a conductive part 40 and an insulating part 50, the conductive part 40 and the insulating part 50 are arranged between the battery cell 10 and the interconnecting bars 20; wherein the second direction B intersects with the first direction A.

[0050] like Figures 1 to 16 As shown, the photovoltaic module disclosed in the embodiment of the utility model includes a cell 10, a plurality of interconnecting strips 20 and a plurality of adhesive strips 30. Among them, the cell 10 is the core component of the photovoltaic module, which can convert solar energy into electrical energy. And the side of the cell 10 facing the sunlight is the light-receiving side of the cell 10, that is, the front side of the cell 10. The side of the cell 10 facing away from the sunlight is the backlight side of the cell 10, that is, the back side of the cell 10.

[0051] In the embodiment of the utility model, a plurality of interconnecting bars 20 and a plurality of adhesive strips 30 are arranged at intervals along the second direction B on the front or back of the battery cell 10, and the plurality of interconnecting bars 20 and the plurality of adhesive strips 30 extend along the first direction A. The second direction B intersects with the first direction A, for example, the second direction B is perpendicular to the first direction A. The plurality of adhesive strips 30 mount the plurality of interconnecting bars 20 on the surface of the battery cell 10, and the plurality of interconnecting bars 20 are electrically connected to the surface of the battery cell 10, so as to collect the current generated by the battery cell 10 through the plurality of interconnecting bars 20 and transmit the current to the external circuit.

[0052] It should be noted that the interconnection bar 20 in the embodiment of the utility model can connect two adjacent battery cells 10 together to collect the current generated by the battery cells 10. Exemplarily, the interconnection bar 20 can be a welding strip. Of course, in the embodiment of the utility model, there are no excessive restrictions on the specific type of the interconnection bar 20, and in actual applications, technicians can choose according to needs.

[0053] In the embodiment of the utility model, Fig.15 and Fig.16 As shown, a conductive part 40 and an insulating part 50 are provided between the cell 10 and the interconnection bar 20. The conductive part 40 is conductive, and the insulating part 50 is insulating. Exemplarily, the conductive part 40 may be gray glue, and the insulating part 50 may be green glue. The provision of the conductive part 40 and the insulating part 50 can improve the reliability of the photovoltaic module and prevent the cell 10 from short-circuiting.

[0054] Furthermore, during the processing of the photovoltaic module, the interconnection strip 20 can be propped up by the conductive part 40 and the insulating part 50, and the bubbles between the battery cell 10 and the adhesive strip 30 can be discharged along the gap between the conductive part 40 and the insulating part 50, thereby further reducing the probability of bubbles being generated between the battery cell 10 and the adhesive strip 30 and improving the yield of the photovoltaic module.

[0055] like Figures 1 to 16 As shown, the photovoltaic module disclosed in the embodiment of the utility model also includes a plurality of adhesive strips 30. The adhesive strips 30 may have a certain viscosity. The interconnection strips 20 are installed correspondingly on the surface of the battery cell 10 through the adhesive strips 30, avoiding the use of a whole piece of adhesive film to connect the welding strip to the battery cell, thereby reducing the amount of adhesive strips 30 used and also reducing the shielding of the surface of the battery cell 10 by the adhesive strips 30, so as to reduce the manufacturing cost of the photovoltaic module and improve the photoelectric conversion efficiency of the photovoltaic module.

[0056] Furthermore, during the processing of the photovoltaic module, the contact area between the adhesive strip 30 and the cell 10 is small, and the bubbles under the adhesive strip 30 can be released from around the adhesive strip 30. Therefore, the probability of bubbles forming between the cell 10 and the adhesive strip 30 can be reduced, thereby improving the yield of the photovoltaic module.

[0057] like Figures 17 to 20 As shown, the adhesive strip 30 in the embodiment of the utility model can be cut by a roll of adhesive film 60. The roll of adhesive film 60 can be an EVA film, a POE film, or a PVB film. In the embodiment of the utility model, there are no excessive restrictions on the specific material of the roll of adhesive film 60. In actual applications, technicians can set it as needed.

[0058] In the embodiment of the utility model, the roll-shaped adhesive film 60 can be cut along the width direction of the roll-shaped adhesive film 60 to form the adhesive strip 30, thereby reducing the shrinkage rate of the adhesive strip 30 and improving the process yield of the photovoltaic module.

[0059] For example, Fig.18 As shown, the width of the roll adhesive film 60 can be customized to match the width of one or more battery cells 10. For example, the width of the roll adhesive film 60 is equal to the width of the battery cell 10. The roll adhesive film 60 is cut along the width direction of the roll adhesive film 60 according to the width of the adhesive strip 30 to obtain the adhesive strip 30, which can be used as follows. Figure 5 In the photovoltaic module shown.

[0060] like Fig.19As shown, the width of the roll adhesive film 60 can be customized to match the sum of the widths of the plurality of cells 10. For example, if there are two cells 10, the width of the roll adhesive film 60 can be equal to the sum of the widths of the two cells 10 and the gap between the two cells 10. The roll adhesive film 60 is cut along the width direction of the roll adhesive film 60 according to the width of the adhesive strip 30 to obtain the adhesive strip 30, which can also be used in photovoltaic modules.

[0061] like Fig. 20 As shown, in order to reduce the feeding frequency and the amount of adhesive film used, the incoming width of the roll adhesive film 60 can also be customized to be multiple times the length of the adhesive strip 30, and the roll adhesive film 60 can be cut according to the width of the adhesive strip 30 along the width direction of the roll adhesive film 60, and then the obtained adhesive strip 30 can be cut into multiple sections or not cut.

[0062] It should be noted that in the present invention, the roll-shaped adhesive film 60 is cut according to the width of the adhesive strip 30 along the width direction of the roll-shaped adhesive film 60 to obtain the adhesive strip 30, which is different from the conventional cutting method along the length direction of the roll-shaped adhesive film 60. The advantage of low shrinkage rate when cutting along the width direction of the roll-shaped adhesive film 60 is fully utilized. The shrinkage rate of the adhesive strip 30 cut along the width direction of the roll-shaped adhesive film 60 along the first direction A is within 2%, preferably 1%, 0.5%, etc. However, the shrinkage rate of the adhesive strip 30 formed by the conventional cutting method along the length direction of the roll-shaped adhesive film 60 along the first direction A is about 8%. Therefore, cutting the roll-shaped adhesive film 60 according to the width of the adhesive strip 30 can reduce the influence of the displacement of the interconnecting strip 20 caused by the shrinkage of the adhesive strip 30 when the battery cell 10 is installed, and ensure that the interconnecting strip 20 is better installed on the battery cell 10.

[0063] Of course, the above are only some examples of the molding methods of the rubber strip 30 in the embodiment of the present invention, which are not intended to be limitations of the present invention. In actual applications, technicians can select the specific molding method of the rubber strip 30 as needed.

[0064] Alternatively, if Figures 5 to 9 As shown, in the embodiment of the utility model, the projection of the adhesive strip 30 on the plane where the battery cell 10 is located falls into the battery cell 10; along the first direction A, the width of the battery cell 10 is f, and the length of the adhesive strip 30 is c, satisfying c≤f, and the units of c and f are both mm.

[0065] like Figure 4As shown, the battery cell 10 in the embodiment of the utility model is generally a rectangular structure. Along the first direction A and the second direction B, the long side of the battery cell 10 is the length direction of the battery cell 10, that is, it can be the second direction B, and the short side of the battery cell 10 is the width direction of the battery cell 10, that is, it can be the first direction A, wherein the length of the battery cell 10 is e and the width is f. Along the first direction A, the battery cell has two sides, that is, one side and the other side, one long side of the battery cell 10 can be used as one side, and the other long side of the battery cell 10 can be used as the other side.

[0066] like Figures 5 to 9 As shown, a photovoltaic module generally includes a plurality of cells 10 , and the plurality of cells 10 may be arranged with or without intervals along a first direction A. A plurality of interconnecting bars 20 connect the plurality of cells 10 together to form a cell string.

[0067] like Figure 2 , Figures 5 to 9 As shown, in the embodiment of the utility model, a rubber strip 30 can be set on one side away from the battery cell 10, or a rubber strip 30 can be set between the two sides of the battery cell 10, so that the interconnection strip 20 can be installed on the battery cell 10 through the rubber strip 30. Accordingly, on the plane where the battery cell 10 is located, the projection of the rubber strip 30 on the battery cell 10 falls into the battery cell 10. And along the first direction A, the width f of the battery cell 10 is greater than or equal to the length c of the rubber strip 30. In other words, the projection of the rubber strip 30 falls into the battery cell 10, and along the first direction A, the length c of the rubber strip 30 is less than or equal to the width f of the battery cell 10.

[0068] In the embodiment of the utility model, on the plane where the battery cell 10 is located, the projection of the adhesive strip 30 is set to fall into the battery cell 10, and along the first direction A, the length c of the adhesive strip 30 is set to be less than or equal to the width f of the battery cell 10. Thus, by means of a multi-segment adhesive strip 30, it is avoided to use a whole piece of adhesive film to connect the battery cells, and the interconnection strip 20 is installed on the battery cell 10, so as to reduce the amount of adhesive strip 30 used and reduce the surface shielding of the battery cell 10.

[0069] Furthermore, during the processing of the photovoltaic module, the contact area between the adhesive strip 30 and the cell 10 is small, and the bubbles under the adhesive strip 30 can be released from around the adhesive strip 30. Therefore, the probability of bubbles forming between the cell 10 and the adhesive strip 30 can be reduced, thereby improving the yield of the photovoltaic module.

[0070] Alternatively, if Figure 3 , Figures 10 to 14As shown, the battery cells 10 in the embodiment of the utility model include n battery cells 10, and the n battery cells 10 are arranged along the first direction A; along the first direction A, the width of each battery cell 10 is f, the gap between two adjacent battery cells 10 is x, and the length of the adhesive strip 30 is d, satisfying that d≤g*f+(g-1)*x, x is greater than or equal to 0mm, the units of d, f and x are all mm, g is a length parameter, and g is a positive integer greater than or equal to 2, g∈[2, 3, 4, ..., n], and n is a positive integer greater than or equal to 2.

[0071] like Figure 4 As shown, the battery cell 10 in the embodiment of the utility model is generally a rectangular structure, and a partial structural schematic diagram of a part of the interconnection bar 20 is shown. The long side of the battery cell 10 is the length direction of the battery cell 10, that is, the second direction B, and the short side of the battery cell 10 is the width direction of the battery cell 10, that is, the first direction A. Among them, the length of the battery cell 10 is e, and the width is f.

[0072] like Figures 10 to 14 As shown, the photovoltaic module in the embodiment of the utility model is a back-contact photovoltaic module. The photovoltaic module includes n battery cells 10, which are arranged along the first direction A and connected together by interconnection strips 20 to form a battery string. Among them, along the first direction A, the width of each battery cell 10 is f, that is, the short side length of the battery cell 10 is f. Along the second direction B, the length of each battery cell 10 is e, that is, the long side length of the battery cell 10 is e. Along the first direction A, the gap between two adjacent battery cells 10 is x, x is greater than or equal to 0mm, and when x is equal to 0mm, the n battery cells 10 are arranged without spacing along the first direction A; preferably, x is greater than 0mm, and the n battery cells 10 are arranged at intervals along the first direction A. Of course, in some embodiments, d can also be greater than g*f+(g-1)*x, and technicians can set it according to actual conditions.

[0073] In the embodiment of the utility model, g may be less than n, or g may be equal to n; in particular, when g is equal to n, each adhesive strip 30 may be connected to n battery cells 10, so that along the first direction A, the length d of the adhesive strip 30 is less than or equal to the sum of n multiplied by the width f of the battery cell 10 and n-1 multiplied by the gap x between two adjacent battery cells 10. That is, along the first direction A, the length of the adhesive strip 30 may be equal to the length of the battery string, or the length of the adhesive strip 30 may be appropriately less than the length of the battery string.

[0074] In the embodiment of the utility model, when g is equal to n, each rubber strip 30 can be connected to the surface of n battery cells 10, so that the interconnection bar 20 can be installed on the battery cell 10 through each rubber strip 30. In addition, along the first direction A, the length d of each rubber strip 30 is set to be less than or equal to the sum of n times the width f of the battery cell 10 and n-1 times the gap x between two adjacent battery cells 10. Thus, by using the whole rubber strip 30, the interconnection bar 20 is installed on the surface of the battery cell 10, and the number of cutting times and cutting time of the rubber strip 30 can also be reduced, and the manufacturing efficiency of the rubber strip 30 is appropriately improved.

[0075] Furthermore, during the processing of the photovoltaic module, the contact area between the adhesive strip 30 and the cell 10 is small, and the bubbles under the adhesive strip 30 can be released from around the adhesive strip 30. Therefore, the probability of bubbles forming between the cell 10 and the adhesive strip 30 can be reduced, thereby improving the yield of the photovoltaic module.

[0076] Alternatively, if Figures 4 to 14 As shown, in the embodiment of the utility model, along the second direction B, the width of the interconnection strip 20 is a, and the distance between the interconnection strip 20 closest to the outside of the battery cell and the edge of the battery cell 10 is M; the multiple adhesive strips 30 include a first adhesive strip 32, and the first adhesive strip 32 at least partially covers the interconnection strip 20 closest to the outside of the battery cell 10. Along the second direction B, the width of the first adhesive strip 32 is b1, satisfying 3a≤b1≤M, wherein the units of a, b1 and M are all mm.

[0077] like Figures 4 to 14 As shown, in the embodiment of the utility model, along the second direction B, the width of the interconnection bar 20 is a, the distance between the interconnection bar 20 closest to the outside of the battery cell 10 and the edge of the battery cell 10 is M, and the width of the first adhesive strip 32 is b1. Among them, 3a≤b1≤M. So that the second adhesive strip 32 can fix the corresponding interconnection bar 20 on the surface of the battery cell 10, and the first adhesive strip 32 will not extend out of the edge of the battery cell 10 to affect the appearance of the photovoltaic module.

[0078] Furthermore, through the above arrangement, the width of the second adhesive strip 32 along the second direction B is smaller, thereby reducing the amount of the second adhesive strip 32 used and reducing the cost of the photovoltaic module.

[0079] Alternatively, if Figures 4 to 14 As shown, in the embodiment of the utility model, along the second direction B, the width of the interconnection strip 20 is a, and the gap between two adjacent interconnection strips 20 is L; the multiple rubber strips 30 include a second rubber strip 31, and the second rubber strip 31 at least partially covers the interconnection strip 20 that is not located closest to the outside of the battery cell 10. Along the second direction B, the width of the second rubber strip 31 is b2, satisfying 3a≤b2≤L, wherein the units of a, b2 and L are all mm.

[0080] like Figures 4 to 14 As shown, in the embodiment of the utility model, along the second direction B, the width of the interconnection bar 20 is set to a, the gap between two adjacent interconnection bars 20 is set to L, and the width of the second adhesive strip 31 is set to b2, wherein 3a≤b2≤L. The second adhesive strip 31 can fix the corresponding interconnection bar 20 to the surface of the battery cell 10, and the second adhesive strip 31 blocks the surface of the battery cell 10 as little as possible, thereby improving the photoelectric conversion efficiency of the photovoltaic module.

[0081] Furthermore, through the above arrangement, the width of the second adhesive strip 31 along the second direction B is smaller, thereby reducing the amount of the second adhesive strip 31 used and reducing the cost of the photovoltaic module.

[0082] It should be noted that if Figures 4 to 14 As shown, the first adhesive strip 32 in the embodiment of the utility model is along the second direction B, and is the adhesive strip 30 closest to the upper edge and / or lower edge of the battery cell 10; and along the second direction B, the adhesive strip 30 located between the two first adhesive strips 32 is the second adhesive strip 31, and multiple second adhesive strips 31 are arranged at intervals along the second direction B.

[0083] In the embodiment of the utility model, along the second direction B, the distance between the first adhesive strip 32 and the edge of the battery cell 10 is M, the distance between two adjacent second adhesive strips 31 is L, and the distance between the second adhesive strip 31 and the first adhesive strip 32 can also be understood as L. Among them, M can be equal to L, M can be greater than L, and M can also be less than L. In this regard, no specific limitation is made in the embodiment of the utility model.

[0084] Alternatively, if Figures 5 to 16 As shown, in the embodiment of the present invention, along the first direction A, the distance between the end of the insulating portion 50 closest to the side of the battery cell 10 and the corresponding side of the battery cell 10 is r, satisfying: r≥0, and the unit of r is mm.

[0085] like Figures 5 to 16 As shown, in an embodiment of the utility model, an insulating portion 50 is provided on the surface of the battery cell 10 along a first direction A, and the insulating portion 50 corresponds to the corresponding interconnection bar 20, thereby avoiding possible deviation of the interconnection bar 20 and causing a short circuit between the interconnection bar 20 and the battery cell 10, thereby ensuring the reliability of the photovoltaic module.

[0086] Exemplarily, along the first direction A, the distance between the end of the insulating part 50 closest to the side of the battery cell 10 and the corresponding side of the battery cell 10 is r, satisfying: r ≥ 0, and the unit of r is mm. The side can be one side or the other side, and the end of the corresponding insulating part 50 is one end of the insulating part 50 corresponding to one side of the battery cell 10, or the end of the insulating part 50 is the other end of the insulating part 50 corresponding to the other side of the battery cell 10. In the embodiment of the utility model, there is no restriction on the specific numerical value of r. In actual applications, technicians can set it as needed.

[0087] Alternatively, if Figures 5 to 16 As shown, in the embodiment of the utility model, along the first direction A, the distance between the end of the interconnection strip 20 and the corresponding side of the battery cell 10 is t, t is not equal to 0 mm, and the distance between the end of the adhesive strip 30 and the corresponding side of the battery cell 10 is s, satisfying: r≤s, 0≤s≤t-1, and the units of s and t are both mm.

[0088] like Figures 5 to 16 As shown, along the first direction A, the distance between the end of the interconnection bar 20 and the corresponding side of the cell 10 is t, the distance between the end of the adhesive strip 30 and the corresponding side of the cell 10 is s, and t is not equal to 0 mm. t not equal to 0 mm at least means that the end of the interconnection bar 20 connected to the cell 10 is appropriately away from one side of the cell 10 or the other side of the cell 10, the projection of the end of the interconnection bar 20 is located in the plane where the cell 10 is located, and the end of the interconnection bar 20 does not extend out of the side of the cell 10. Among them, r≤s, 0≤s≤t-1, s and t are both in mm, so that the adhesive strip 30 can more securely install the interconnection bar 20 on the surface of the cell 10, avoiding the risk of short circuit in the photovoltaic module caused by the exposure of one end of the interconnection bar 20.

[0089] Furthermore, during the manufacturing process of the photovoltaic module, the interconnection bar 20 can be more reliably installed on the surface of the battery cell 10 to prevent the packaging film from flowing between the interconnection bar 20 and the battery cell 10 during the lamination process, thereby affecting the reliability of the electrical connection between the interconnection bar 20 and the battery cell 10.

[0090] Alternatively, if Figures 5 to 14 As shown, in the embodiment of the present invention, along the first direction A, the distance between the end of the conductive portion 40 closest to the side of the battery cell 10 and the corresponding side of the battery cell 10 is u, satisfying 2mm≤u≤10mm.

[0091] In the embodiment of the present utility model, the conductive part 40 has conductivity and can transmit the current generated by the battery cell 10 to the interconnection bar 20. In the embodiment of the present utility model, along the first direction A, the distance u between the end of the conductive part 40 closest to the side of the battery cell 10 and the corresponding side of the battery cell 10 satisfies 2 mm ≤ u ≤ 10 mm. The side can be one side or the other side. Correspondingly, the end of the conductive part 40 closest to the battery cell 10 is either the end of the conductive part 40 closest to the battery cell 10 corresponding to one side of the battery cell 10, or the end of the conductive part 40 closest to the battery cell 10 corresponding to the other side of the battery cell 10. In this way, the current generated by the battery cell 10 can be transmitted to the interconnection bar 20 as much as possible, improving the photoelectric conversion efficiency of the photovoltaic module.

[0092] Exemplarily, along the first direction A, the distance u between the end of the conductive part 40 closest to the side of the battery cell 10 and the corresponding side of the battery cell 10 can be set to 2 mm, 4 mm, 6 mm, 8 mm, 10 mm or values between any two of them, etc. There is no specific limitation on this.

[0093] As Figures 5 to 14 shown, in the embodiment of the present utility model, along the first direction A, the distance u between the end of the conductive part 40 closest to the side of the battery cell 10 and the corresponding side of the battery cell 10 is set, and the distance between the end of the interconnection bar 20 and the corresponding side of the battery cell 10 is set to t, where t is not equal to 0 mm. Among them, s < u, u ≥ t + 0.5. In this way, the current generated by the battery cell 10 can be collected to a greater extent through the conductive part 40 and transmitted to the interconnection bar 20, thereby improving the photoelectric conversion efficiency of the photovoltaic module.

[0094] Optionally, as Figures 5 to 14 shown, in the embodiment of the present utility model, along the second direction B, the width p of the conductive part 40 satisfies: a - 0.2 ≤ p ≤ a + 1, p < b1, p < b2, and the unit of p is mm.

[0095] As Figures 5 to 14 shown, along the second direction B, the width of the interconnection bar 20 is set to a, and the width of the conductive part 40 is set to p. Among them, a - 0.2 ≤ p ≤ a + 1, p < b1, p < b2, which can enable the conductive part 40 to electrically connect the interconnection bar 20 and the battery cell 10, improving the reliability of the electrical connection between the interconnection bar 20 and the battery cell 10, and thus effectively collecting the current generated by the battery cell 10.

[0096] Optionally, as Figures 5 to 14As shown, in the embodiment of the present utility model, along the second direction B, the width of the insulating part 50 is q, satisfying: 2a ≤ q ≤ 5a, q < b1, q < b2, where the unit of q is mm, and the unit of q is mm.

[0097] As Figures 5 to 14 shown, along the second direction B, the width of the interconnection strip 20 is set to a, and the width of the insulating part 50 is set to q. Among them, 2a ≤ q ≤ 5a, q < b1, q < b2, and the unit of q is mm. Exemplarily, along the second direction B, the width q of the insulating part 50 can be set to be equal to 2 times the width a of the interconnection strip 20, can be set to be equal to 3 times the width a of the interconnection strip 20, or can be set to be equal to 5 times the width a of the interconnection strip 20.

[0098] In the embodiment of the present utility model, along the second direction B, the width q of the insulating part 50 is set to be greater than or equal to 2 times the width a of the interconnection strip 20 and less than or equal to 5 times the width a of the interconnection strip 20. So that the insulating part 50 can ensure the insulation between the interconnection strip 20 and the battery cell 10, improve the reliability of the photovoltaic module, and avoid the short - circuit phenomenon of the photovoltaic module.

[0099] It should be noted that the distances recorded in multiple places above at least mean: the horizontal distance along the first direction A, and the widths recorded in multiple places above at least mean: the horizontal distance along the first direction A or the vertical distance along the second direction B, which need to be clearly explained.

[0100] In a second aspect, the present utility model discloses a photovoltaic system, including the photovoltaic module described in any one of the above - mentioned embodiments.

[0101] It should be noted that the photovoltaic module included in the photovoltaic system in the embodiment of the present utility model has the same structure as the photovoltaic module described in any one of the above - mentioned embodiments, and its beneficial effects are also similar, so no further elaboration will be made here.

[0102] In the present utility model, the photovoltaic module includes a plurality of battery cells, a plurality of interconnection strips, and a plurality of adhesive strips. The plurality of interconnection strips connect the plurality of battery cells, and the plurality of adhesive strips mount the plurality of interconnection strips on the battery cells, avoiding the use of a whole piece of adhesive film. The contact area of a single adhesive strip with the battery cell is small, and the air bubbles under the adhesive strip can disperse from the periphery of the adhesive strip, reducing the probability of forming air bubbles. And the interconnection strip can be propped up by the conductive part and the insulating part, and the air bubbles can be discharged along the gap between the conductive part, the insulating part and the battery cell, thereby further reducing the probability of generating air bubbles between the battery cell and the adhesive strip. Overall, the amount of the adhesive strip can also be reduced, reducing the shielding of the adhesive strip to the battery cell, thereby reducing the cost of the photovoltaic module, improving the photoelectric conversion efficiency of the photovoltaic module, and improving the yield of the photovoltaic module.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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, each of which extends along a first direction, and connects the plurality of battery cells, wherein the plurality of interconnection bars at least partially connected to each of the battery cells are arranged at intervals along a second direction; A plurality of adhesive strips, each of which extends along a first direction, and is used to mount the plurality of interconnecting strips on the battery cells, wherein the plurality of adhesive strips at least partially mounted on each of the battery cells are arranged at intervals along a second direction; wherein the second direction intersects the first direction; Along the second direction, the width of the interconnection strip is a, and the distance between the interconnection strip closest to the outer side of the battery cell and the edge of the battery cell is M; the multiple adhesive strips include a first adhesive strip, the first adhesive strip at least partially covers the interconnection strip closest to the outer side of the battery cell, and along the second direction, the width of the first adhesive strip is b1, satisfying 3a≤b1≤M, wherein the units of a, b1 and M are all mm; And / or, along the second direction, the width of the interconnection strip is a, and the gap between two adjacent interconnection strips is L; the multiple rubber strips include a second rubber strip, and the second rubber strip at least partially covers the interconnection strip that is not located closest to the outside of the battery cell. Along the second direction, the width of the second rubber strip is b2, satisfying 3a≤b2≤L, wherein the units of a, b2 and L are all mm.

2. The photovoltaic module according to claim 1, characterized in that: The photovoltaic module further comprises: a conductive part and an insulating part, wherein the conductive part and the insulating part are arranged between the cell sheet and the interconnection bar; and / or, the shrinkage rate of the rubber strip along the first direction is greater than 0 and less than or equal to 2%; And / or, the cell is a back contact solar cell; And / or, the projection of the adhesive strip on the plane where the battery cell is located falls into the battery cell; along the first direction, the width of the battery cell is f, the length of the adhesive strip is c, and c≤f is satisfied, and the units of c and f are both mm.

3. The photovoltaic module according to claim 1, characterized in that: The battery cells include n cells, and the n battery cells are arranged along the first direction; Along the first direction, the width of each of the battery cells is f, the gap between two adjacent battery cells is x, the length of the rubber strip is d, satisfying d≤g*f+(g-1)*x, x is greater than or equal to 0mm, the units of d, f and x are all mm, g is a length parameter, and g is a positive integer greater than or equal to 2, g∈[2, 3, 4, ..., n], n is a positive integer greater than or equal to 2.

4. The photovoltaic module according to claim 2, characterized in that: Along the first direction, the distance between the end of the insulating portion closest to the side edge of the battery cell and the corresponding side edge of the battery cell is r, satisfying r≥0, and the unit of r is mm; And / or, along the first direction, the distance between the end of the conductive portion closest to the side edge of the battery cell and the corresponding side edge of the battery cell is u, satisfying: 2mm≤u≤10mm.

5. The photovoltaic module according to claim 1 or 4, characterized in that: Along the first direction, the distance between the end of the interconnection strip and the corresponding side of the battery cell is t, and t is not equal to 0 mm; The distance between the end of the rubber strip and the corresponding side of the cell is s, satisfying: 0 ≤ s ≤ t - 1, where the units of both s and t are mm.

6. The photovoltaic module according to claim 2 or 4, characterized in that: Along the first direction, the distance between the end of the interconnection strip and the corresponding side of the cell is t, and t is not equal to 0 mm; The distance between the end of the conductive part closest to the side of the cell and the corresponding side of the cell is u, satisfying: u ≥ t + 0.

5.

7. The photovoltaic module according to claim 4, characterized in that: The distance between the end of the rubber strip and the corresponding side of the cell is s; satisfying: r ≤ s; or, s < u.

8. The photovoltaic module according to claim 2, characterized in that: Along the second direction, the width of the conductive part is p, satisfying: a - 0.2 ≤ p ≤ a + 1, where the unit of p is mm; And / or, along the second direction, the width of the insulating part is q, satisfying: 2a ≤ q ≤ 5a, where the unit of q is mm.

9. The photovoltaic module according to claim 8, characterized in that: p < b1; and / or, p < b2.

10. A photovoltaic system, characterized in that: Comprising the photovoltaic module according to any one of claims 1 - 9.

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