Photovoltaic modules and photovoltaic systems

Abstract

This invention discloses a photovoltaic module and a photovoltaic system. The photovoltaic module includes a first battery string group, a second battery string group, and a third battery string group connected in series. The first battery string group includes N first battery strings connected in parallel and arranged sequentially along a first direction; the second battery string group includes N second battery strings connected in parallel and arranged sequentially along the first direction; the third battery string group includes a first battery string subgroup and a second battery string subgroup connected in parallel and arranged along a second direction; and the first battery string group and the first battery string group are arranged along the first direction, with the first battery string group including N / 2 third battery strings connected in parallel and arranged sequentially along the first direction; the second battery string group and the second battery string group are arranged along the first direction, with the second battery string group including N / 2 fourth battery strings connected in parallel and arranged sequentially along the first direction. This invention enables rapid differentiation of the positive and negative terminals of the photovoltaic module, making photovoltaic module layout easier.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and more particularly to a photovoltaic module and a photovoltaic system. Background Technology

[0002] With the development of photovoltaic technology, the power of photovoltaic modules has been increasing year by year. In order to increase the output power of photovoltaic modules, the size of the solar cells in photovoltaic modules has also been gradually increased.

[0003] Currently, photovoltaic (PV) modules typically use halved solar cells welded together. However, the current in a single cell string is relatively high, resulting in significant overall power loss for the PV module. Specifically, a half-cell is typically used in a six-string, two-parallel configuration, where the high current in a single string leads to substantial overall power loss. In response, existing technology proposes cutting the entire solar cell into quarter-cell pieces (i.e., quarter-cell solar cells) to reduce the cell area. This shortens the current loop within the cell, reduces internal power loss, and ultimately improves the output power of the PV module.

[0004] However, when arranging existing photovoltaic modules composed of quarter-cell solar cells, it is not easy to distinguish between positive and negative electrodes. Summary of the Invention

[0005] This invention provides a photovoltaic module and a photovoltaic system to quickly distinguish between positive and negative electrodes, making photovoltaic module layout easier.

[0006] According to one aspect of the present invention, a photovoltaic module is provided, the photovoltaic module comprising: A first battery string group, comprising N first battery strings connected in parallel and arranged sequentially along a first direction, the first battery strings extending along a second direction; the first direction and the second direction are perpendicular; wherein, N is an even number; The second battery string group and the first battery string group are arranged along the second direction; the second battery string group includes N second battery strings connected in parallel and arranged sequentially along the first direction, and the first battery string extends along the second direction; A third battery string group, comprising a first battery string subgroup and a second battery string group connected in parallel and arranged along the second direction; and the first battery string group and the first battery string group are arranged along the first direction, the first battery string group comprising N / 2 third battery strings connected in parallel and arranged sequentially along the first direction; the second battery string group and the second battery string group are arranged along the first direction, the second battery string group comprising N / 2 fourth battery strings connected in parallel and arranged sequentially along the first direction; both the third battery string and the fourth battery string extend along the second direction; The first battery string group, the second battery string group, and the third battery string group are connected in series; the first battery string, the second battery string, the third battery string, and the fourth battery string each include multiple battery cells connected in series.

[0007] Optionally, the photovoltaic module further includes a first edge and a second edge opposite to each other along the second direction; The first polarity ends of N first battery strings and the first polarity ends of N / 2 third battery strings are close to the first edge; The second polarity ends of N second battery strings and the first polarity ends of N / 2 fourth battery strings are close to the second edge; Wherein, at the first edge, the first polarity ends of N first battery strings are electrically connected through a first busbar, and the first polarity ends of N / 2 third battery strings are electrically connected through a second busbar; at the second edge, the second polarity ends of N second battery strings and the first polarity ends of N / 2 fourth battery strings are electrically connected through a third busbar; the first busbar, the second busbar and the third busbar extend along the first direction.

[0008] Optionally, the photovoltaic module also includes: The fourth busbar connects the second polarity terminals of the N first battery strings; the fourth busbar extends along the first direction. The fifth busbar connects the second polarity terminals of N / 2 of the third battery strings and the second polarity terminals of N / 2 of the fourth battery strings. The fifth busbar extends along the first direction.

[0009] Optionally, the photovoltaic module also includes: The first bypass diode has its first terminal electrically connected to the second terminal of the first battery string, and its second terminal electrically connected to the first terminal of the first battery string. The second bypass diode has its first terminal electrically connected to the second polarity terminal of the second battery string group, and its second terminal electrically connected to the first polarity terminal of the second battery string group. The third bypass diode has its first terminal electrically connected to the second terminal of the third battery string, and its second terminal electrically connected to the first terminal of the third battery string.

[0010] Optionally, the photovoltaic module also includes: The dual-unit junction box includes a first sub-box and a second sub-box; the first bypass diode and the second bypass diode are integrated in the first sub-box, and the third bypass diode is integrated in the second sub-box; A first jumper wire extends along the second direction and passes through the first battery string and the second battery string; the first jumper wire introduces the first polarity terminal and the second polarity terminal of the first battery string and the second polarity terminal of the second battery string into the first sub-box. The second jumper extends along the second direction and passes through the third battery string group; the second jumper introduces the first polarity end, the second polarity end of the first battery string sub-group and the first polarity end of the second battery string group into the second sub-box.

[0011] Optionally, in the second direction, the first jumper is located at the center of the first battery string group, and the second jumper is located at the edge of the third battery string group near the first battery string group.

[0012] Optionally, the segmented battery cell is a four-segmented battery cell; The long side of the quadrilateral battery cell extends along the first direction, and the short side of the quadrilateral battery cell extends along the second direction.

[0013] Optionally, along the second direction, there is a gap between adjacent battery cells, and the gap ranges from 0.3 mm to 0.8 mm.

[0014] Optionally, the length L1 of the segmented solar cell is in the range of 182mm≤L1≤186mm, and the width L2 of the segmented solar cell is in the range of 48mm≤L2≤54mm.

[0015] According to another aspect of the present invention, a photovoltaic system is provided, which includes photovoltaic modules as described in any embodiment of the present invention.

[0016] The embodiments of the present invention can achieve at least the following beneficial effects: Firstly, in the embodiments of the present invention, the segmented solar cells can be, for example, three-segmented or four-segmented solar cells. By adopting segmentation technology, the current of a single string of solar cells can be reduced, thereby reducing the power loss of the photovoltaic module. Secondly, the embodiments of the present invention adopt an N-parallel-three-series configuration, for example, a four-parallel-three-series configuration, which simplifies the circuit design.

[0017] Thirdly, the first battery string group consists of N first battery strings connected in parallel, the second battery string group consists of N first battery strings connected in parallel, and the third battery string group consists of N / 2 third battery strings and N / 2 fourth battery strings connected symmetrically in parallel. Furthermore, the first and second battery string groups are connected in series, and the third and second battery string groups are also connected in series, resulting in differences in layout. Therefore, during layout, the positive and negative terminals of each battery string group can be quickly distinguished, making layout easier. Additionally, the ends of the first and second battery string groups differ. Therefore, during layout, the positive and negative terminals of each battery string group can be quickly distinguished, making layout easier.

[0018] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the cell layout structure of a photovoltaic module provided in an embodiment of the present invention; Figure 2 for Figure 1 The circuit diagram corresponding to the layout of the solar cells; Figure 3 for Figure 1 Enlarged schematic diagram of the central region Q1; Figure 4 for Figure 1 Enlarged schematic diagram of region Q2 in the middle; Figure 5 for Figure 1 Enlarged schematic diagram of the central region Q3; Figure 6 for Figure 1 Enlarged schematic diagram of the central region Q4; Figure 7 This is a schematic diagram of a segmented battery cell provided in an embodiment of the present invention. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] Figure 1 This is a schematic diagram of the cell layout structure of a photovoltaic module provided in an embodiment of the present invention. Figure 2 for Figure 1 The circuit diagram corresponding to the layout of the solar cells. See [link / reference]. Figures 1-2 The photovoltaic module includes: The first battery string group 110 includes N first battery strings connected in parallel and arranged sequentially along the first direction X, and the first battery strings extend along the second direction Y; the first direction X and the second direction Y are perpendicular; where N is an even number. The second battery string group 120 and the first battery string group 110 are arranged along the second direction Y; the second battery string group 120 includes N second battery strings connected in parallel and arranged sequentially along the first direction X, and the first battery string extends along the second direction Y. A third battery string group 130 includes a first battery string subgroup 131 and a second battery string group 132 connected in parallel and arranged along the second direction Y; and the first battery string group 131 and the first battery string group 110 are arranged along the first direction X, the first battery string group 131 includes N / 2 third battery strings connected in parallel and arranged sequentially along the first direction X; the second battery string group 132 and the second battery string group 120 are arranged along the first direction X, the second battery string group 132 includes N / 2 fourth battery strings connected in parallel and arranged sequentially along the first direction X; both the third battery string and the fourth battery string extend along the second direction Y; The first battery string group 110, the second battery string group 120, and the third battery string group 130 are connected in series; the first battery string, the second battery string, the third battery string, and the fourth battery string all include multiple segmented battery cells connected in series.

[0024] The embodiments of this invention employ an N-parallel, three-series configuration, for example, a four-parallel, three-series configuration. This simplifies the circuit design and allows for quick differentiation of positive and negative terminals, making photovoltaic module layout easier. A detailed analysis follows: Firstly, the first battery string group 110 consists of N first battery strings connected in parallel, and the second battery string group 120 consists of N first battery strings connected in parallel; the third battery string group 130 consists of N / 2 third battery strings and N / 2 fourth battery strings connected in symmetrical parallel. Furthermore, the first battery string group 110 and the second battery string group 120 are connected in series, and the third battery string group 130 and the second battery string group 120 are also connected in series. This results in a difference in the layout of the photovoltaic module. Therefore, during layout, the positive and negative terminals of each battery string group can be quickly distinguished, making the layout easier.

[0025] Secondly, the first, second, third, and fourth battery strings all include positive and negative terminals. For example, the upper end of the first battery string is the positive terminal and the lower end is the negative terminal; the upper end of the second battery string is the positive terminal and the lower end is the negative terminal; the upper end of the third battery string is the positive terminal and the lower end is the negative terminal; and the upper end of the fourth battery string is the negative terminal and the lower end is the positive terminal. Correspondingly, the upper end of the first battery string group 110 is the positive terminal and the lower end is the negative terminal; the upper end of the second battery string group 120 is the positive terminal and the lower end is the negative terminal; the upper end of the first battery string subgroup 131 is the positive terminal and the lower end is the negative terminal; and the upper end of the second battery string subgroup 132 is the negative terminal and the lower end is the positive terminal. This configuration facilitates the series connection of the first battery string group 110, the second battery string group 120, and the third battery string group 130. Specifically, the negative terminal of the first battery string group 110 and the positive terminal of the second battery string group 120 are adjacent in the second direction Y, which facilitates the series connection of the first battery string group 110 and the second battery string group 120. The negative terminal of the second battery string group 120 and the positive terminal of the second battery string sub-group 132 are adjacent in the first direction X, which facilitates the series connection of the second battery string group 120 and the second battery string sub-group 132, thereby facilitating the series connection of the second battery string group 120 and the third battery string group 130. Therefore, the positive terminals of the first battery string group 110 and the first battery string sub-group 131 are adjacent in the first direction X, but they are not electrically connected; however, the negative terminals of the second battery string group 120 and the positive terminals of the second battery string sub-group 132 are adjacent in the first direction X and are electrically connected. Therefore, during layout, the positive and negative terminals of each battery string group can be quickly distinguished, making layout easier.

[0026] In addition, in the embodiments of the present invention, the segmented solar cells can be, for example, three-segmented or four-segmented solar cells. By adopting segmentation technology, the current of a single string of solar cells can be reduced, thereby reducing the power loss of the photovoltaic module.

[0027] Figure 3 for Figure 1 Enlarged schematic diagram of region Q1 in the middle area. Figure 4 for Figure 1 A magnified view of region Q2 in the middle area. See also... Figures 1-4 Based on the above embodiments, optionally, the photovoltaic module further includes a first edge 10 and a second edge 20 opposite to each other along the second direction Y; the first polarized ends of N first battery strings and the first polarized ends of N / 2 third battery strings are close to the first edge 10; the second polarized ends of N second battery strings and the first polarized ends of N / 2 fourth battery strings are close to the second edge 20; wherein, at the first edge 10, the first polarized ends of the N first battery strings are electrically connected through a first busbar 210, and the first polarized ends of the N / 2 third battery strings are electrically connected through a second busbar 220; at the second edge 20, the second polarized ends of the N second battery strings and the first polarized ends of the N / 2 fourth battery strings are electrically connected through a third busbar 230; the first busbar 210, the second busbar 220 and the third busbar 230 extend along the first direction X.

[0028] For example, the first polarity terminal is the positive terminal, and the second polarity terminal is the negative terminal. Specifically, the positive terminal of the first battery string group 110 is located at the first edge 10, and the negative terminal of the first battery string group 110 is electrically connected to the positive terminal of the second battery string group 120; the negative terminal of the second battery string group 120 is located at the second edge 20, and the positive terminal of the second battery string subgroup 132 is located at the second edge 20, and the negative terminal of the second battery string group 120 and the positive terminal of the second battery string subgroup 132 are electrically connected; therefore, the first battery string group 110, the second battery string group 120, and the third battery string group 130 are connected in series.

[0029] At the first edge 10, the first busbar 210 and the second busbar 220 are spaced apart and not connected at region Q11. At the second edge 20, the third busbar 230 extends from the left end to the right end and is continuous at region Q21. Therefore, during layout, the positive and negative terminals of each battery string can be quickly distinguished by the arrangement of the busbars, making layout easier.

[0030] Figure 5 for Figure 1 A magnified view of the central region Q3. See also... Figures 1-5Optionally, based on the above embodiments, the photovoltaic module further includes a fourth busbar 240 and a fifth busbar 250. The second polarity ends of N first battery strings are electrically connected through the fourth busbar 240; the fourth busbar 240 extends along the first direction X; the second polarity ends of N / 2 third battery strings and the second polarity ends of N / 2 fourth battery strings are electrically connected through the fifth busbar 250; the fifth busbar 250 extends along the first direction X.

[0031] In this circuit, the second polarity terminals of the N first battery strings are opposite to the first polarity terminals of the N second battery strings, and can be connected in series via the fourth busbar 240; the second polarity terminals of the N / 2 third battery strings are opposite to the second polarity terminals of the N / 2 fourth battery strings, and can be connected in parallel via the fifth busbar 250. This configuration simplifies the circuit design and makes it easy to implement.

[0032] See Figures 1-5 Based on the above embodiments, optionally, the photovoltaic module further includes a first bypass diode D1, a second bypass diode D2, and a third bypass diode D3. The first terminal of the first bypass diode D1 is electrically connected to the second terminal of the first battery string 110, and the second terminal of the first bypass diode D1 is also electrically connected to the first terminal of the first battery string 110. The first terminal of the second bypass diode D2 is electrically connected to the second terminal of the second battery string 120, and the second terminal of the third bypass diode D3 is also electrically connected to the second terminal of the third battery string 130.

[0033] For example, the first electrode of the first bypass diode D1 is the anode and the second electrode is the cathode, and the first polarity terminal of the first battery string 110 is the positive terminal and the second polarity terminal is the negative terminal. The first bypass diode D1 is connected in anti-parallel with the first battery string 110. The first bypass diode D1 is configured to conduct when the first battery string 110 generates a large bias voltage due to shading or a fault, allowing current to bypass the first battery string 110 and reducing the hot spot effect of the photovoltaic module.

[0034] Similarly, the first terminal of the second bypass diode D2 is the anode, and the second terminal is the cathode. The first polarity terminal of the second battery string 120 is the positive terminal, and the second polarity terminal is the negative terminal. The second bypass diode D2 is connected in anti-parallel with the second battery string 120. The second bypass diode D2 is configured to conduct when the second battery string 120 experiences a large bias voltage due to shading or a fault, allowing current to bypass the second battery string 120 and reducing the hot spot effect of the photovoltaic module. The first terminal of the third bypass diode D3 is the anode, and the second terminal is the cathode. The first polarity terminal of the third battery string 130 is the positive terminal, and the second polarity terminal is the negative terminal. The third bypass diode D3 is connected in anti-parallel with the third battery string 130. The third bypass diode D3 is configured to conduct when the third battery string 130 experiences a large bias voltage due to shading or a fault, allowing current to bypass the third battery string 130 and reducing the hot spot effect of the photovoltaic module.

[0035] Based on the above embodiments, optionally, the photovoltaic module further includes a split junction box, which includes a first sub-box and a second sub-box; a first bypass diode D1 and a second bypass diode D2 are integrated in the first sub-box, and a third bypass diode D3 is integrated in the second sub-box. The split junction box is a commonly used type of junction box in photovoltaic modules. This configuration in the embodiments of the present invention helps maintain the consistency of the appearance of the photovoltaic module with that of photovoltaic modules provided by related technologies, thus having universality in application.

[0036] See Figures 1-5 Based on the above embodiments, optionally, the photovoltaic module further includes a first jumper 310, which extends along the second direction Y and passes through the first battery string group 110 and the second battery string group 120; the first jumper 310 introduces the first polarity end and the second polarity end of the first battery string group 110 and the second polarity end of the second battery string group 120 into the first sub-box; a second jumper 320 extends along the second direction Y and passes through the third battery string group 130; the second jumper 320 introduces the first polarity end and the second polarity end of the first battery string sub-group 131 and the first polarity end of the second battery string sub-group 132 into the second sub-box.

[0037] Optionally, a separator is provided between the first line 310 and each cell, and between the second jumper 320 and each cell. The separator is used to prevent short circuits between the cell and the first jumper 310, and between the second jumper 320 and each cell.

[0038] For example, in one embodiment, the first jumper 310 leads out four wires to the first sub-box. The first of the four wires is used to electrically connect the second polarity terminal of the first battery string 110 to the first terminal of the first bypass diode D1 in the first sub-box. The second of the four wires is used to electrically connect the first polarity terminal of the first battery string 110 to the second terminal of the first bypass diode D1 in the first sub-box. The third of the four wires is used to electrically connect the second polarity terminal of the second battery string 120 to the first terminal of the second bypass diode D2 in the first sub-box. The fourth of the four wires is used to electrically connect the first polarity terminal of the second battery string 120 to the second terminal of the second bypass diode D2 in the first sub-box. Optionally, in another embodiment, the first jumper 310 leads out three wires to the first sub-box. The first of the three wires is used to electrically connect the second polarity terminal of the first battery string 110 to the first terminal of the first bypass diode D1 in the first sub-box. The second of the three wires is used to electrically connect the first polarity terminal of the first battery string 110 to the second terminal of the first bypass diode D1 in the first sub-box, and simultaneously connect the second polarity terminal of the second battery string 120 to the first terminal of the second bypass diode D2 in the first sub-box. The third of the four wires is used to electrically connect the first polarity terminal of the second battery string 120 to the second terminal of the second bypass diode D2 in the first sub-box.

[0039] The second jumper 320 leads out two wires to the second sub-box. One of the two wires is used to connect the second polarity terminal of the third battery string 130 to the first polarity terminal of the third bypass diode D3 in the second sub-box. The other of the two wires is used to connect the first polarity terminal of the third battery string 130 to the second polarity terminal of the third bypass diode D3 in the second sub-box.

[0040] See also Figures 1-5 Based on the above embodiments, optionally, in the second direction Y, the first jumper 310 is located at the center of the first battery string group 110, and the second jumper 320 is located near the edge of the third battery string group 130 near the first battery string group 110. For example, the first battery string group 110 includes four first battery strings, the second battery string group 120 includes four second battery strings, and the third battery string group 130 includes two third battery strings and two fourth battery strings. The first jumper 310 is located at the center of the four first battery strings, and simultaneously, the first jumper 310 is also located at the center of the four second battery strings; the second jumper 320 is located at the boundary between the third battery strings and the first battery strings, and simultaneously, the second jumper 320 is also located at the boundary between the fourth battery strings and the second battery strings. This arrangement makes the first jumper 310 and the second jumper 320 symmetrically arranged.

[0041] Figure 6 for Figure 1 Enlarged view of region Q4 in the middle area. Figure 7 This is a schematic diagram of a segmented battery cell provided in an embodiment of the present invention. See also... Figures 1-7 Based on the above embodiments, optionally, the battery cells are quadruple battery cells; the long side of the quadruple battery cell extends along the first direction X, and the short side of the quadruple battery cell extends along the second direction Y. Adjacent battery cells are connected in series via solder ribbons 410, and the extension direction of the solder ribbons 410 is parallel to the short side of the battery cell. Therefore, the solder ribbons 410 enable the series connection of battery cells 11 within the same battery string. Furthermore, each busbar (including the first busbar 210, the second busbar 220, the third busbar 230, the fourth busbar 240, and the fifth busbar 250) extends along the first direction X, and each busbar is connected to the battery cells via solder ribbons 410. For example, in each first battery string, the cell segment at the positive terminal is connected to the first busbar 210 via solder ribbon 410, and the cell segment at the negative terminal is connected to the fourth busbar 240 via solder ribbon 410, thereby achieving parallel connection of the first battery strings. Simultaneously, in each second battery string, the cell segment at the positive terminal is connected to the fourth busbar 240 via solder ribbon 410, and the cell segment at the negative terminal is connected to the third busbar 230 via solder ribbon 410, thereby achieving parallel connection of the second battery strings and series connection of the first battery string group 110 and the second battery string group 120. In each first battery string subgroup 131, the cell segment at the positive terminal is connected to the second busbar 220 via solder ribbon 410, and the cell segment at the negative terminal is connected to the fifth busbar 250 via solder ribbon 410. Simultaneously, the cell segments at the negative end of each second battery string subgroup 132 are connected to the fifth busbar 250 via solder ribbons 410, and the cell segments at the positive end of each second battery string subgroup 132 are connected to the third busbar 230 via solder ribbons 410, thereby realizing the parallel connection of each battery string in the third battery string group 130 and the series connection of the third battery string group 130 and the second battery string group 120. This configuration is beneficial for realizing the series and parallel connection of different battery strings and battery string groups.

[0042] See also Figures 1-7Based on the above embodiments, optionally, along the second direction Y, there is a gap 30 between adjacent solar cells, and the width of the gap 30 ranges from 0.3mm to 0.8mm. This arrangement avoids the problem of microcracks caused by height differences between adjacent solar cells due to overlap (negative spacing between solar cells), and also avoids the slowdown in production cycle and the increased cost associated with inter-cell film filling mechanisms caused by stuffing adhesive film between solar cells. Therefore, the embodiments of the present invention can save production costs while avoiding the problem of microcracks in solar cells. Furthermore, the width of the gap 30 should be ensured to be within 0.8mm to avoid reducing the efficiency of the photovoltaic module if the gap 30 is too wide.

[0043] See also Figure 7 Based on the above embodiments, optionally, the length L1 of the segmented solar cells ranges from 182mm ≤ L1 ≤ 186mm, and the width L2 of the segmented solar cells ranges from 48mm ≤ L2 ≤ 54mm. This configuration ensures that the string length of the solar cell string formed by multiple segmented solar cells meets the creepage distance required by the photovoltaic module, guaranteeing the normal operation of the photovoltaic module.

[0044] This invention also provides a photovoltaic system, which includes any photovoltaic module as provided in any embodiment of this invention and has corresponding beneficial effects.

[0045] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A photovoltaic module, characterized in that, include: A first battery string group, comprising N first battery strings connected in parallel and arranged sequentially along a first direction, the first battery strings extending along a second direction; the first direction and the second direction are perpendicular; wherein, N is an even number; The second battery string group and the first battery string group are arranged along the second direction; the second battery string group includes N second battery strings connected in parallel and arranged sequentially along the first direction, and the first battery string extends along the second direction; A third battery string group, comprising a first battery string subgroup and a second battery string group connected in parallel and arranged along the second direction; and the first battery string group and the first battery string group are arranged along the first direction, the first battery string group comprising N / 2 third battery strings connected in parallel and arranged sequentially along the first direction; the second battery string group and the second battery string group are arranged along the first direction, the second battery string group comprising N / 2 fourth battery strings connected in parallel and arranged sequentially along the first direction; both the third battery string and the fourth battery string extend along the second direction; The first battery string group, the second battery string group, and the third battery string group are connected in series; the first battery string, the second battery string, the third battery string, and the fourth battery string each include multiple battery cells connected in series.

2. The photovoltaic module according to claim 1, characterized in that, The photovoltaic module also includes a first edge and a second edge that are opposite each other along the second direction; The first polarity ends of N first battery strings and the first polarity ends of N / 2 third battery strings are close to the first edge; The second polarity ends of N second battery strings and the first polarity ends of N / 2 fourth battery strings are close to the second edge; Wherein, at the first edge, the first polarity ends of N first battery strings are electrically connected through a first busbar, and the first polarity ends of N / 2 third battery strings are electrically connected through a second busbar; at the second edge, the second polarity ends of N second battery strings and the first polarity ends of N / 2 fourth battery strings are electrically connected through a third busbar; the first busbar, the second busbar and the third busbar extend along the first direction.

3. The photovoltaic module according to claim 2, characterized in that, Also includes: The fourth busbar connects the second polarity terminals of the N first battery strings. The fourth busbar extends along the first direction; The fifth busbar connects the second polarity terminals of N / 2 of the third battery strings and the second polarity terminals of N / 2 of the fourth battery strings. The fifth busbar extends along the first direction.

4. The photovoltaic module according to claim 1, characterized in that, Also includes: The first bypass diode has its first terminal electrically connected to the second terminal of the first battery string, and its second terminal electrically connected to the first terminal of the first battery string. The second bypass diode has its first terminal electrically connected to the second polarity terminal of the second battery string group, and its second terminal electrically connected to the first polarity terminal of the second battery string group. The third bypass diode has its first terminal electrically connected to the second terminal of the third battery string, and its second terminal electrically connected to the first terminal of the third battery string.

5. The photovoltaic module according to claim 4, characterized in that, Also includes: The dual-unit junction box includes a first sub-box and a second sub-box; the first bypass diode and the second bypass diode are integrated in the first sub-box, and the third bypass diode is integrated in the second sub-box; A first jumper wire extends along the second direction and passes through the first battery string and the second battery string; the first jumper wire introduces the first polarity terminal and the second polarity terminal of the first battery string and the second polarity terminal of the second battery string into the first sub-box. The second jumper extends along the second direction and passes through the third battery string group; the second jumper introduces the first polarity end, the second polarity end of the first battery string sub-group and the first polarity end of the second battery string group into the second sub-box.

6. The photovoltaic module according to claim 5, characterized in that, In the second direction, the first jumper is located at the center of the first battery string group, and the second jumper is located at the edge of the third battery string group near the first battery string group.

7. The photovoltaic module according to claim 1, characterized in that, The segmented battery cell is a four-segmented battery cell; The long side of the quadrilateral battery cell extends along the first direction, and the short side of the quadrilateral battery cell extends along the second direction.

8. The photovoltaic module according to claim 7, characterized in that, Along the second direction, there is a gap between adjacent battery cells, and the gap ranges from 0.3mm to 0.8mm.

9. The photovoltaic module according to claim 7, characterized in that, The length L1 of the segmented battery cell is in the range of 182mm≤L1≤186mm, and the width L2 of the segmented battery cell is in the range of 48mm≤L2≤54mm.

10. A photovoltaic system, characterized in that, Including the photovoltaic module as described in any one of claims 1-9.

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