Solar cell module and photovoltaic system

Abstract

The utility model provides a solar cell module and a photovoltaic system. The solar cell module comprises a plurality of cell string groups, and the first direction intersects with the second direction; in the second direction, the battery string group comprises a first side and a second side which are opposite to each other; the plurality of bus bars are respectively arranged on the back surfaces of the different battery string groups, the bus bars extend along the first direction, and in the second direction, the distance between the bus bars and the first side is smaller than the distance between the bus bars and the second side; and at least two bus bars in the plurality of bus bars are mutually staggered in the second direction. The staggered bus bars can disperse the stress of the solar cell module, so that the stress concentration of the solar cell module can be effectively reduced, the risk of subfissure of a cell piece is further reduced, and the stability of the solar cell module is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to solar cell module technical field, especially relate to a solar cell module and photovoltaic system. BACKGROUND

[0002] In the solar cell module, usually be equipped with busbar to connect the solder strip of cell string end part. In the related art, each busbar is usually located on the same straight line, when laminating, it can cause the stress of solar cell module to be more concentrated, thereby can increase the risk of cell piece hidden crack in the solar cell module, reduced the stability of solar cell module.

[0003] Therefore, how to reduce the risk of cell piece hidden crack in the solar cell module has become a problem to be solved. SUMMARY

[0004] The utility model provides a kind of solar cell module and photovoltaic system to solve the technical problem of how to reduce the risk of cell piece hidden crack in the solar cell module.

[0005] The utility model embodiment is realized as follows, the utility model provides a kind of solar cell module and photovoltaic system. A kind of solar cell module, comprising: multiple cell string groups, multiple the cell string group is arranged along the first direction, each the cell string group includes multiple cell strings arranged along the first direction, each the cell string includes multiple cell pieces arranged along the second direction, the first direction with the second direction intersects;Along the second direction, the solar cell module includes opposite first side and second side;Multiple busbars are respectively arranged on the back of different cell string groups, the busbar extends along the first direction, and in the second direction, the distance between the busbar and the first side is less than the distance between the busbar and the second side;Wherein, at least two busbars in multiple busbars are staggered in the second direction.

[0006] Further, in the second direction, the interval of two busbars staggered is 5mm to 200mm.

[0007] Further, multiple busbars include first busbar and second busbar, and multiple cell string groups include first cell string group and second cell string group;The first busbar is arranged on the back of Xth cell piece in the second direction of the first cell string group, and the second busbar is arranged on the back of Yth cell piece in the second direction of the second cell string group;Wherein first cell string group second cell string group, X is not equal to Y.

[0008] Further, the first bus bar is arranged on the back of the first piece of the battery piece in the first battery string group in the second direction, and the second bus bar is arranged on the back of the second piece of the battery piece in the second battery string group in the second direction; or the first bus bar is arranged on the back of the second piece of the battery piece in the first battery string group in the second direction, and the second bus bar is arranged on the back of the first piece of the battery piece in the second battery string group in the second direction.

[0009] Further, the plurality of bus bars further comprises a third bus bar, and the plurality of battery string groups further comprises a third battery string group; the third bus bar is arranged on the back of the first piece of the battery piece in the third battery string group in the second direction; or the third bus bar is arranged on the back of the second piece of the battery piece in the third battery string group in the second direction.

[0010] Further, the plurality of bus bars comprises a fourth bus bar and a fifth bus bar, and the plurality of battery string groups comprises a fourth battery string group and a fifth battery string group; the fourth bus bar is arranged on the back of the Zth piece of the battery piece in the fourth battery string group in the second direction; the fifth bus bar is arranged on the back of the Zth piece of the battery piece in the fifth battery string group in the second direction; wherein the distance between the fourth bus bar and the first side is not equal to the distance between the fifth bus bar and the first side.

[0011] Further, the plurality of bus bars comprises a fourth bus bar and a fifth bus bar, and the plurality of battery string groups comprises a fourth battery string group and a fifth battery string group; the fourth bus bar is arranged on the back of the Zth piece of the battery piece in the fourth battery string group in the second direction; the fifth bus bar is arranged on the back of the Zth piece of the battery piece in the fifth battery string group in the second direction; wherein the distance between the fourth bus bar and the first side is not equal to the distance between the fifth bus bar and the first side.

[0012] Further, the fourth bus bar is arranged on the back of the first piece of the battery piece in the fourth battery string group in the second direction, and the fifth bus bar is arranged on the back of the first piece of the battery piece in the fifth battery string group in the second direction; or the fourth bus bar is arranged on the back of the second piece of the battery piece in the fourth battery string group in the second direction, and the fifth bus bar is arranged on the back of the second piece of the battery piece in the fifth battery string group in the second direction.

[0013] Further, the plurality of bus bars comprises a sixth bus bar, and the plurality of battery strings comprises a sixth battery string group; the sixth bus bar is arranged on the back surface of the first piece of the battery piece in the sixth battery string group in the second direction; or the sixth bus bar is arranged on the back surface of the second piece of the battery piece in the sixth battery string group in the second direction.

[0014] Further, in the second direction, the distance between the bus bar and the first side is 2mm to 300mm.

[0015] Further, in the second direction, the bus bar is arranged at the end of the solar cell module; and / or, in the second direction, the bus bar is arranged near the middle of the solar cell module.

[0016] The utility model embodiment further provides a photovoltaic system, the photovoltaval system includes the solar cell module as described above.

[0017] The solar cell module in the utility model discloses at least two bus bars of the plurality of bus bars arranged in different battery string groups are staggered in the second direction. Since the staggered bus bars can disperse the stress of the solar cell module lamination process, the stress concentration of the solar cell module can be effectively reduced, the risk of battery piece hidden crack is reduced, and the stability of the solar cell module is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments in the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0019] Figure 1 It is the module schematic diagram of photovoltaic system provided by an embodiment of the utility model;

[0020] Figure 2 It is the partial structure schematic diagram of solar cell module provided by an embodiment of the utility model;

[0021] Figure 3 It is the partial structure schematic diagram of solar cell module provided by another embodiment of the utility model;

[0022] Figure 4 It is the partial structure schematic diagram of solar cell module provided by another embodiment of the utility model;

[0023] Figure 5Part structure schematic diagram of solar cell module is provided by the utility model another embodiment;

[0024] Figure 6 Part structure schematic diagram of solar cell module is provided by the utility model still another embodiment;

[0025] Figure 7 Part structure schematic diagram of solar cell module is provided by the utility model yet another embodiment;

[0026] Figure 8 Part structure schematic diagram of solar cell module is provided by the utility model another embodiment;

[0027] Figure 9 Part structure schematic diagram of solar cell module is provided by the utility model still another embodiment;

[0028] Figure 10 Part structure schematic diagram of solar cell module is provided by the utility model yet another embodiment;

[0029] Figure 11 The utility model one embodiment provides a schematic diagram of solar cell module.

[0030] Main element symbol explanation: 1000, photovoltaic system;100, solar cell module;10, battery string group;20, busbar;11, first battery string group;12, second battery string group;13, third battery string group;14, fourth battery string group;15, fifth battery string group;16, sixth battery string group;21, first busbar;22, second busbar;23, third busbar;24, fourth busbar;25, fifth busbar;26, sixth busbar;101, battery string;102, first side;103, second side;1011, cell piece. Specific implementation

[0031] In order to make the utility model purposes, technical scheme and advantages more clearly, the following is combined with the embodiment, and the utility model is further detailedly explained.The embodiment described below with reference to the drawings is exemplary, and is only used to explain the utility model, and can not be understood as the limitation of the utility model.In addition, it should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0032] In the description of the utility model, it is understood that the terms "length", "width", "upper", "lower", "top", "bottom", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0033] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0034] In the description of the utility model, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] The following disclosure provides many different embodiments or examples for implementing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0036] Please refer to Figure 1The photovoltaic system 1000 in the embodiment of the utility model can include the solar cell module 100 in the embodiment of the utility model, the solar cell module 100 in the embodiment of the utility model can include a plurality of battery string groups 10, the battery string group 10 can include a plurality of battery strings 101, the battery string 101 can include a plurality of battery pieces 1011, a plurality of battery pieces 1011 can be connected in series by welding strip in turn to form the battery string group 10.Each battery string group 10 in the solar cell module 100 can be connected in series, parallel or series-parallel combination to realize the current output, for example, the connection between each battery string group 10 can be realized by bus bar 20.

[0037] In the embodiment, the photovoltaic system 1000 can be applied in the solar cell module power station, such as ground power station, roof power station, water surface power station and the like, and can also be applied in the device or apparatus using solar energy to generate electricity, such as user solar power supply, solar street lamp, solar car, solar building and the like.Of course, it can be understood that the application scenario of the photovoltaic system 1000 is not limited to this, that is to say, the photovoltaic system 1000 can be applied in all fields requiring solar energy to generate electricity.Taking the solar cell module 100 power generation system network as an example, the photovoltaic system 1000 can include solar cell module 100 array, bus box and inverter, the solar cell module 100 array can be the array combination of a plurality of battery modules, for example, a plurality of battery modules can form a plurality of solar cell module 100 arrays, the solar cell module 100 array is connected with the bus box, the bus box can converge the current generated by the solar cell module 100 array, the converged current flows through the inverter to convert into the alternating current required by the power grid, and then is connected to the power network to realize solar power supply.

[0038] The drawings provided by the application are schematic drawings, and some elements are not shown in the drawings.The purpose is to clearly describe the technical scheme and highlight the key points of the utility model.It is not intended to limit the technical scheme and not to include these unshown elements.That is to say, the drawings are only examples, and do not represent the specific form of the solar cell module 100.

[0039] As Figures 2 to 11As shown, the solar cell module 100 in the embodiment of the utility model includes: a plurality of battery string groups 10, a plurality of battery string groups 10 are arranged along the first direction, each battery string group 10 includes a plurality of battery strings 101 arranged along the first direction, each battery string 101 includes a plurality of battery pieces 1011 arranged along the second direction, the first direction and the second direction cross;Along the second direction, the solar cell module 100 includes opposite first side 102 and second side 103;A plurality of bus bars 20 are respectively arranged on the back of different battery string groups 10, the bus bar 20 extends along the first direction, and in the second direction, the distance between the bus bar 20 and the first side 102 is less than the distance between the bus bar 20 and the second side 103;Wherein, at least two bus bars 20 in the plurality of bus bars 20 are staggered in the second direction.

[0040] Therefore, the solar cell module 100 in the utility model is arranged by at least two bus bars 20 of the plurality of bus bars 20 in different battery string groups 10 in the second direction. Since the staggered bus bar 20 can disperse the stress of the laminating process of the solar cell module 100, the stress concentration of the solar cell module 100 can be effectively reduced, and the risk of the battery piece 1011 hidden crack in the solar cell module 100 can be reduced, and the stability of the solar cell module 100 can be improved.

[0041] Specifically, the solar cell module 100 includes a plurality of battery string groups 10 arranged along the first direction. Each battery string group 10 includes a plurality of battery strings 101 arranged along the first direction, and each battery string 101 includes a plurality of battery pieces 1011 arranged along the second direction. The bus bar 20 is arranged on the different battery string groups 10, specifically on the back of the battery string group 10.

[0042] It can be understood that the battery string group 10 in the utility model refers to the battery string group 10 formed by connecting two battery strings 101 by the bus bar 20. Each bus bar 20 extends along the first direction, and the number of bus bars 20 is multiple.

[0043] The bus bar 20 is specifically arranged on the back of the battery string group 10, so that the bus bar 20 can be hidden, so that the front of the solar cell module 100 can be effectively made more flat and simple, so that the overall appearance of the solar cell module 100 can be improved.

[0044] Further, the battery piece 1011 can be a back contact battery piece 1011, a Topcon battery piece 1011, a PERC battery, etc. In the embodiment of the utility model, the battery piece 1011 in the battery string 101 is a back contact battery piece 1011.

[0045] For the arrangement of the busbars 20, at least two busbars 20 of the plurality of busbars 20 are staggered with respect to each other in the second direction. It can be understood that "at least two busbars 20 of the plurality of busbars 20 are staggered with respect to each other in the second direction" means that, in the second direction, the busbars 20 are not completely aligned, and at least two busbars 20 are not aligned in the second direction. In other words, if a busbar 20 is arranged at a certain position of one battery string group 10, the busbar 20 arranged at the corresponding position of another battery string group 10 will be displaced (offset or staggered) in the second direction, rather than being directly arranged at the same position.

[0046] It can be understood that, since the contact position of the busbar 20 and the cell 1011 is usually a region of mechanical stress concentration, if the plurality of busbars 20 are completely aligned in the same direction in the solar cell module 100, a relatively large stress concentration will be generated in the local region, thereby increasing the risk of hidden cracking of the cell 1011 in the solar cell module 100. In the embodiment of the present application, by staggering at least two busbars 20 in the second direction, the stress distribution of each busbar 20 to the solar cell module 100 will no longer completely overlap, so that the stress is more evenly distributed to the entire solar cell module 100, thereby effectively reducing the stress concentration of the solar cell module 100, and further reducing the risk of hidden cracking of the cell 1011 in the solar cell module 100, and improving the stability and reliability of the solar cell module 100.

[0047] Specifically, in the second direction, the solar cell module 100 has opposite first and second sides 102 and 103, and the first and second sides 102 and 103 extend in the first direction. The first and second sides 102 and 103 are two boundary lines of the solar cell module 100 in the second direction, respectively.

[0048] It can be understood that "in the second direction, the distance between the busbar 20 and the first side 102 is less than the distance between the busbar 20 and the second side 103" means that, in the second direction, the distance between each busbar 20 and the first side 102 is less than the distance between each busbar 20 and the second side 103. In other words, each busbar 20 is located on the side close to the first side 102 of the solar cell module 100.

[0049] As shown in FIG. 1, the solar cell module 100 includes a plurality of busbars 20 and a plurality of cells 1011. The plurality of busbars 20 are arranged in the first direction, and the plurality of cells 1011 are arranged in the second direction perpendicular to the first direction. Each busbar 20 is arranged on the surface of the solar cell module 100, and each busbar 20 is arranged on the surface of the solar cell module 100. Figure 2 and Figure 3As shown, in one possible implementation, the spacing D1 between two staggered busbars 20 in the second direction is 5 mm to 200 mm. For example, it can be 5 mm, 10 mm, 20 mm, 40 mm, 50 mm, 70 mm, 80 mm, 90 mm, 100 mm, 120 mm, 150 mm, 180 mm, or 200 mm. This further disperses the stress distribution of each busbar 20, reducing stress concentration in the solar cell module 100.

[0050] Understandably, two staggered busbars 20 can be spaced a certain distance apart in the second direction to further disperse the stress on each busbar 20 during lamination of the solar cell module 100. Of course, if the distance between the staggered busbars 20 is too large, it will increase the current transmission efficiency, thereby reducing the efficiency of the solar cell module 100. Therefore, the distance between the staggered busbars 20 cannot be too large.

[0051] like Figure 4 and Figure 8 As shown, in one possible implementation, the plurality of busbars 20 include a first busbar 21 and a second busbar 22, and the plurality of battery string groups 10 include a first battery string group 11 and a second battery string group 12; the first busbar 21 is disposed on the back side of the Xth battery cell 1011 of the first battery string group 11 in the second direction, and the second busbar 22 is disposed on the back side of the Yth battery cell 1011 of the second battery string group 12 in the second direction; wherein, the first busbar 21 is disposed on the Xth battery cell 1011 of the first battery string group 11 in the second direction, and the second busbar 22 is disposed on the Yth battery cell 1011 of the second battery string group 12 in the second direction, and X is not equal to Y. Thus, by setting busbars 20 on the back of the first battery string group 11 and the second battery string group 12 respectively, and arranging them on the battery cells 1011 at different relative positions, the first busbar 21 and the second busbar 22 are staggered along the second direction, thereby dispersing the stress of the busbars 20, reducing the risk of microcracks in the battery cells 1011 and improving the overall stability of the solar cell module 100.

[0052] It is understood that both the first battery string group 11 and the second battery string group 12 have multiple battery cells 1011 arranged along the second direction. A first busbar 21 is disposed on the Xth battery cell 1011 of the first battery string group 11 in the second direction, and a second busbar 22 is disposed on the Yth battery cell 1011 of the second battery string group 12 in the second direction. In other words, the first busbar 21 and the second busbar 22 are disposed on battery cells 1011 at different positions in the second direction, achieving a staggered arrangement of the first busbar 21 and the second busbar 22 in the second direction.

[0053] Further, the first bus bar 21 can be arranged on the back of the first piece of the battery sheet 1011 in the second direction of the first battery string group 11, and the second bus bar 22 can be arranged on the back of the second piece of the battery sheet 1011 in the second direction of the second battery string group 12. In this way, the first bus bar 21 and the second bus bar 22 can be further arranged in a staggered manner in the second direction.

[0054] Alternatively, the first bus bar 21 can be arranged on the back of the second piece of the battery sheet 1011 in the second direction of the first battery string group 11, and the second bus bar 22 can be arranged on the back of the first piece of the battery sheet 1011 in the second direction of the second battery string group 12. In this way, the first bus bar 21 and the second bus bar 22 can be further arranged in a staggered manner in the second direction.

[0055] Therefore, in the embodiment of the present application, the first bus bar 21 and the second bus bar 22 can be arranged in a staggered manner in the second direction in various ways, thereby improving the flexibility of the solar cell module 100.

[0056] As shown in FIGS. 1, 2 and 3, the solar cell module 100 can further include a third bus bar 23 arranged on the back of the first piece of the battery sheet 1011 in the second direction of the third battery string group 13. Figure 4 and Figure 8 As shown in FIGS. 1, 2 and 3, the solar cell module 100 can further include a third bus bar 23 arranged on the back of the first piece of the battery sheet 1011 in the second direction of the third battery string group 13.

[0057] Specifically, in the first direction, the first bus bar 21, the second bus bar 22 and the third bus bar 23 can be arranged in various sequences. For example, the first bus bar 21, the second bus bar 22 and the third bus bar 23 can be arranged in sequence; alternatively, the first bus bar 21, the third bus bar 23 and the second bus bar 22 can be arranged in sequence; alternatively, the second bus bar 22, the first bus bar 21 and the third bus bar 23 can be arranged in sequence; alternatively, the second bus bar 22, the third bus bar 23 and the first bus bar 21 can be arranged in sequence; alternatively, the third bus bar 23, the second bus bar 22 and the first bus bar 21 can be arranged in sequence; alternatively, the third bus bar 23, the first bus bar 21 and the second bus bar 22 can be arranged in sequence. This is not limited herein.

[0058] Optionally, when the busbar 20 is disposed on the first cell 1011 along the second direction in the solar cell module 100, an insulating strip can be provided between the busbar 20 and the solder ribbon, and an opening can be made in the insulating strip. For example, when the busbar 20 is disposed on the first cell 1011 along the second direction in the solar cell module 100, the first cell 1011 is provided with a first solder ribbon and a second solder ribbon. The first solder ribbon is electrically connected to the first electrode of the first cell 1011, and the second solder ribbon is electrically connected to the second electrode of the first cell 1011. The polarities of the first electrode and the second electrode are opposite, and the polarity of the first electrode is the same as that of the busbar 20 disposed on the first cell 1011. In this case, the busbar 20 can be insulated from the second solder ribbon by the insulating strip, and the busbar 20 can be electrically connected to the first solder ribbon through the opening in the insulating strip.

[0059] When the busbar 20 is positioned on the second cell 1011 along the second direction in the solar cell module 100, the solder strips that need to be electrically connected to the busbar 20 can be partially bent to achieve electrical connection. An insulating strip is then placed between the solder strips that need to be insulated from the busbar 20 to achieve insulation. This reduces the overall thickness of the solar cell module 100 and decreases the risk of microcracks and fragmentation in the cell 1011.

[0060] like Figure 9 and Figure 10 As shown, in one possible embodiment, the plurality of busbars 20 include a fourth busbar 24 and a fifth busbar 25, and the plurality of battery string groups 10 include a fourth battery string group 14 and a fifth battery string group 15; the fourth busbar 24 is disposed on the back side of the Zth battery cell 1011 of the fourth battery string group 14 in the second direction; the fifth busbar 25 is disposed on the back side of the Zth battery cell 1011 of the fifth battery string group 15 in the second direction; wherein, the distance between the fourth busbar 24 and the first side 102 is not equal to the distance between the fifth busbar 25 and the first side 102.

[0061] Thus, in the solar cell module 100, the fourth busbar 24 and the fifth busbar 25 can both be located on the same cell 1011 in the second direction of the corresponding cell string; and the fact that the distance between the fourth busbar 24 and the first side 102 is not equal to the distance between the fifth busbar 25 and the first side 102 allows the fourth busbar 24 and the fifth busbar 25 to be staggered in the second direction. Since the staggered busbars 20 can disperse the stress in the lamination process of the solar cell module 100, the stress concentration of the solar cell module 100 can be effectively reduced, thereby reducing the risk of microcracks and fragmentation of the cell 1011 in the solar cell module 100 and improving the stability of the solar cell module 100.

[0062] It is understandable that, in addition to setting each busbar 20 at different positions on the battery cells 1011 of the corresponding battery string to achieve an interleaved arrangement of the busbars 20, when each busbar 20 is set at the same position on the battery cells 1011 of the corresponding battery string, the interleaved arrangement of the busbars 20 can also be achieved by adjusting the spacing between each busbar 20 and the first side 102 in the second direction.

[0063] In the second direction, the distance D2 between the fourth busbar 24 and the first side 102 is greater than or less than the distance D3 between the fifth busbar 25 and the first side 102. In other words, the distance D2 between the fourth busbar 24 and the first side 102 is not equal to the distance D3 between the fifth busbar 25 and the first side 102. This achieves a staggered arrangement of the fourth busbar 24 and the fifth busbar 25 in the second direction. Furthermore, since the staggered busbars 20 can disperse the stress of the solar cell module 100, stress concentration in the solar cell module 100 during the lamination process can be effectively reduced, thereby reducing the risk of microcracks in the solar cell 1011 and improving the stability of the solar cell module 100.

[0064] Specifically, the fourth busbar 24 can be disposed on the back side of the first solar cell 1011 in the second direction of the fourth battery string 14, and the fifth busbar 25 can be disposed on the back side of the first solar cell 1011 in the second direction of the fifth battery string 15. Alternatively, the fourth busbar 24 can be disposed on the back side of the second solar cell 1011 in the second direction of the fourth battery string 14, and the fifth busbar 25 can be disposed on the back side of the second solar cell 1011 in the second direction of the fifth battery string 15. Thus, in this embodiment of the present invention, the staggered arrangement of the first busbar 21 and the second busbar 22 in the second direction can be achieved in various ways, thereby improving the flexibility of the solar cell module 100 arrangement.

[0065] like Figure 9 and Figure 10 As shown, in one possible implementation, the plurality of busbars 20 includes a sixth busbar 26, and the plurality of battery strings 101 includes a sixth battery string group 16; the sixth busbar 26 is disposed on the back side of the first battery cell 1011 of the sixth battery string group 16 in the second direction; or, in the second direction, the sixth busbar 26 is disposed on the back side of the second battery cell 1011 of the sixth battery string group 16 in the second direction. Thus, in this embodiment of the invention, the sixth busbar 26 can be configured in various ways, thereby improving the flexibility of the solar cell module 100 configuration.

[0066] Specifically, in the first direction, the fourth bus bar 24, the fifth bus bar 25 and the sixth bus bar 26 can be arranged in various sequences. For example, they can be arranged in the sequence of the fourth bus bar 24, the fifth bus bar 25 and the sixth bus bar 26; or they can be arranged in the sequence of the fourth bus bar 24, the sixth bus bar 26 and the fifth bus bar 25; or they can be arranged in the sequence of the fifth bus bar 25, the fourth bus bar 24 and the sixth bus bar 26; or they can be arranged in the sequence of the fifth bus bar 25, the sixth bus bar 26 and the fourth bus bar 24; or they can be arranged in the sequence of the sixth bus bar 26, the fifth bus bar 25 and the fourth bus bar 24; or they can be arranged in the sequence of the sixth bus bar 26, the fourth bus bar 24 and the fifth bus bar 25. This is not limited herein.

[0067] As shown in Figure 2 Further, in the second direction, the distance D between the bus bar 20 and the first side 102 is 2mm to 300mm. For example, it is 2mm, 5mm, 10mm, 20mm, 40mm, 50mm, 70mm, 80mm, 90mm, 100mm, 120mm, 150mm, 180mm, 200mm, 250mm or 300mm. In this way, the position of the bus bar 20 can be adjusted flexibly, thereby improving the flexibility of the arrangement of the solar cell module 100.

[0068] It can be understood that, in the second direction, the distance between the bus bar 20 and the first side 102 is 2mm to 300mm, which means that the distance between each bus bar 20 and the first side 102 in the second direction is 2mm to 300mm. In this way, the position of each bus bar 20 can be adjusted flexibly on the premise that at least two bus bars 20 in the plurality of bus bars 20 are staggered in the second direction.

[0069] As shown in Figure 11 In one possible embodiment, in the second direction, the bus bar 20 is arranged at the end of the solar cell module 100; and / or, in the second direction, the bus bar 20 is arranged near the middle of the solar cell module 100. In this way, the bus bar 20 can be arranged in various ways in the embodiments of the present application, thereby improving the flexibility of the arrangement of the solar cell module 100.

[0070] Specifically, for the setting position of the busbar 20, along the second direction, the busbar 20 can be arranged at the end of the solar cell module 100. The end of the solar cell module 100 can be the head end of the solar cell module 100 along the second direction, or can be the tail end of the solar cell module 100 along the second direction. In other words, in the embodiment of the present application, the busbar 20 can be arranged at the first piece of cell 1011, the second piece of cell 1011, and / or the third piece of cell 1011 of the solar cell module 100 along the second direction, and / or the busbar 20 can be arranged at the first piece of cell 1011, the second piece of cell 1011, and / or the third piece of cell 1011 of the solar cell module 100 along the second direction. Exemplarily, the busbar 20 can be arranged at the head end and / or the tail end of the solar cell module 100 along the second direction. It can be understood that when the busbar 20 is arranged at the end of the solar cell module 100, the busbar 20 can be used for series connection between the adjacent cell strings 101 along the first direction.

[0071] Specifically, along the second direction, the busbar 20 can also be arranged near the middle of the solar cell module 100. It can be understood that "near the middle of the solar cell module 100" does not simply refer to the absolute geometric center of the solar cell module 100, but refers to a range area close to the central area of the solar cell module 100 along the second direction. In other words, the busbar 20 can also be arranged at the cell 1011 near the middle of the solar cell module 100 along the second direction. It can be understood that when the busbar 20 is arranged near the middle of the solar cell module 100 along the second direction, the busbar 20 can be used for parallel connection between the adjacent cell strings 101 along the second direction.

[0072] It can be understood that in such an embodiment, the solar cell module 100 can further include a frame, a back plate, a solar cell module 100 glass, and a film. The film can be filled between the front and back surfaces of the cell 1011, the solar cell module 100 glass, and the adjacent cell 1011, and can be a transparent adhesive with good light transmission performance and aging resistance, for example, the film can use EVA film or POE film, which can be selected according to actual conditions, and is not limited herein.

[0073] The solar cell module 100 glass can be covered on the adhesive film on the front of the cell sheet 1011, and the solar cell module 100 glass can be super white glass, which has high light transmittance, high transparency, and has superior physical, mechanical and optical properties, for example, the light transmittance of the super white glass can reach more than 92%, which can protect the cell sheet 1011 as much as possible without affecting the efficiency of the cell sheet 1011. At the same time, the adhesive film can bond the solar cell module 100 glass and the cell sheet 1011 together, and the presence of the adhesive film can seal and insulate the cell sheet 1011 and prevent water and moisture.

[0074] The back plate can be attached to the adhesive film on the back of the cell sheet 1011, and the back plate can protect and support the cell sheet 1011, has reliable insulation, water resistance and aging resistance, and the back plate can have multiple choices, which can be tempered glass, organic glass, aluminum alloy TPT composite adhesive film, etc., which can be set according to specific conditions, which is not limited here. The whole composed of the back plate, the cell sheet 1011, the adhesive film and the solar cell module 100 glass can be set on the frame, and the frame is the main external support structure of the whole solar cell module 100, and can stably support and install the solar cell module 100, for example, the solar cell module 100 can be installed at the position required to be installed through the frame.

[0075] In the description of the present specification, the description referring to the terms "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0076] In addition, the above only describes the preferred embodiments of the present application and does not limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A solar cell module, characterized by, The solar cell module comprises: a plurality of battery string groups, the plurality of battery string groups are arranged along a first direction, each of the battery string groups comprises a plurality of battery strings arranged along the first direction, each of the battery strings comprises a plurality of battery pieces arranged along a second direction, the first direction intersects the second direction; along the second direction, the solar cell module comprises opposite first and second sides; a plurality of bus bars respectively arranged on the back of different battery string groups, the bus bars extend along the first direction, and in the second direction, the distance between the bus bars and the first side is less than the distance between the bus bars and the second side; wherein at least two of the plurality of bus bars are staggered with each other in the second direction.

2. The solar cell module according to claim 1, characterized by In the second direction, the distance between the two staggered bus bars is 5mm to 200mm.

3. The solar cell module according to claim 1, characterized by, The plurality of bus bars comprises a first bus bar and a second bus bar, and the plurality of battery string groups comprises a first battery string group and a second battery string group; The first bus bar is arranged on the back of the Xth battery piece of the first battery string group in the second direction, and the second bus bar is arranged on the back of the Yth battery piece of the second battery string group in the second direction; wherein the first battery string group is different from the second battery string group, and X is not equal to Y.

4. The solar cell module according to claim 3, characterized by The first bus bar is arranged on the back of the first battery piece of the first battery string group in the second direction, and the second bus bar is arranged on the back of the second battery piece of the second battery string group in the second direction; or The first bus bar is arranged on the back of the second battery piece of the first battery string group in the second direction, and the second bus bar is arranged on the back of the first battery piece of the second battery string group in the second direction.

5. The solar cell module according to claim 4, characterized by The plurality of bus bars further comprises a third bus bar, and the plurality of battery string groups further comprises a third battery string group, the third bus bar is arranged on the back of the first battery piece of the third battery string group in the second direction; or The third bus bar is arranged on the back of the second battery piece of the third battery string group in the second direction.

6. The solar cell module according to claim 1, wherein The plurality of bus bars comprises a fourth bus bar and a fifth bus bar, and the plurality of battery string groups comprises a fourth battery string group and a fifth battery string group; The fourth bus bar is arranged on the back of the Zth battery piece of the fourth battery string group in the second direction; The fifth bus bar is arranged on the back of the Zth battery piece of the fifth battery string group in the second direction; wherein the distance between the fourth bus bar and the first side is not equal to the distance between the fifth bus bar and the first side.

7. The solar cell module according to claim 6, wherein The fourth bus bar is arranged on the back of the first battery piece of the fourth battery string group in the second direction, and the fifth bus bar is arranged on the back of the first battery piece of the fifth battery string group in the second direction; or The fourth bus bar is arranged on the back of the second battery piece of the fourth battery string group in the second direction, and the fifth bus bar is arranged on the back of the second battery piece of the fifth battery string group in the second direction.

8. The solar cell module according to claim 6, wherein The plurality of bus bars includes a sixth bus bar, and the plurality of battery strings includes a sixth battery string group; The sixth bus bar is arranged on the back surface of the first one of the battery pieces of the sixth battery string group in the second direction; or The sixth bus bar is arranged on the back surface of the second one of the battery pieces of the sixth battery string group in the second direction.

9. The solar cell module according to claim 1, characterized by, In the second direction, the distance between the bus bar and the first side is 2 mm to 300 mm.

10. The solar cell module according to claim 1, characterized by, In the second direction, the bus bar is arranged at an end of the solar cell module; and / or In the second direction, the bus bar is arranged near the middle of the solar cell module.

11. A photovoltaic system characterized by, The solar cell module as claimed in any one of claims 1 to 10.

Images