Photovoltaic module
By designing chamfered solar cells and backlight busbar structures in photovoltaic modules, the problem of cell breakage during welding was solved, improving production yield and welding reliability, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-09
- Publication Date
- 2026-04-10
AI Technical Summary
In photovoltaic modules, the welding process between the first and second busbars can easily lead to the breakage of solar cells, affecting production yield.
A photovoltaic module structure is designed such that the corners of the solar cells around the welding point are chamfered, the welding point is located in a clearance area, the welding head does not need to contact the solar cell during welding, and the busbar is located on the back side to avoid blocking light. This structure reduces the impact of welding on the solar cells.
This reduces the risk of solar cell breakage during welding, improves the production yield and welding reliability of photovoltaic modules, and reduces costs by eliminating the need for additional components.
Smart Images
Figure CN121843255A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] Embodiments of the present application relate to the technical field of photovoltaic power generation, and particularly to a photovoltaic module. BACKGROUND
[0002] The photovoltaic module can include solar cell pieces, a first bus bar and a second bus bar. The solar cell pieces are arranged in an array, and the first bus bar and the second bus bar are electrically connected to the solar cell pieces, respectively, and the first bus bar and the second bus bar are welded.
[0003] In general, the solar cell pieces are easily broken during the welding of the first bus bar and the second bus bar, which affects the production yield of the photovoltaic module. SUMMARY
[0004] Embodiments of the present application provide a photovoltaic module, which can reduce the impact of the welding of the first bus bar and the second bus bar on the solar cell pieces, and is conducive to improving the production yield of the photovoltaic module.
[0005] In one aspect, embodiments of the present application provide a photovoltaic module. The photovoltaic module includes a plurality of solar cell pieces, a first bus bar and a second bus bar. The plurality of solar cell pieces are arranged in multiple columns along a first direction and in multiple rows along a second direction, and the first direction is perpendicular to the second direction. The first bus bar extends along the first direction, and the first bus bar is electrically connected to the solar cell pieces. Along the second direction, the first bus bar is located at an intersection area of two rows of solar cell pieces arranged adjacently, and the first bus bar is located at a side where a back light surface of the solar cell pieces is located, and / or along the second direction, the first bus bar is located at a side of the multiple columns of solar cell pieces. The second bus bar extends along the second direction, and the second bus bar is electrically connected to the solar cell pieces. Along the first direction, the second bus bar is located at an intersection area of two columns of solar cell pieces arranged adjacently, and the second bus bar is located at a side where the back light surface of the solar cell pieces is located. Along a thickness direction of the solar cell pieces, the second bus bar is arranged at a side of the first bus bar, and a position where the second bus bar intersects with the first bus bar is a welding point. Among the multiple solar cell pieces located at a periphery of the welding point, an angle portion of any solar cell piece close to the welding point is chamfered.
[0006] In some possible implementations, at least two solar cell pieces arranged adjacently along the second direction form a first solar cell piece group, and the first solar cell piece group includes a first solar cell piece and a second solar cell piece. The first solar cell piece includes a first chamfer and a first edge, and the first chamfer and the first edge are arranged oppositely along the second direction. The second solar cell piece includes a second chamfer and a second edge, and the second chamfer and the second edge are arranged oppositely along the second direction. Along the second direction, the first chamfer is away from the second solar cell piece relative to the first edge, and the second chamfer is away from the first solar cell piece relative to the second edge.
[0007] In some possible implementation manners, the first solar cell group further includes a third solar cell, a shape of an orthographic projection of the third solar cell on the XY plane is a rectangle, and the XY plane is a plane on which the first direction and the second direction lie. Along the second direction, the third solar cell is located between the first solar cell and the second solar cell.
[0008] In some possible implementation manners, the first solar cell group includes one third solar cell, and any column of solar cells includes a plurality of first solar cell groups.
[0009] In some possible implementation manners, the first bus bar includes a first first bus bar, along the second direction, the first first bus bar is located on one side of the plurality of columns of solar cells, the number of the first first bus bars is two, and the two first first bus bars are arranged at intervals along the first direction. The photovoltaic module further includes a third bus bar, the third bus bar extends along the first direction, and the third bus bar is electrically connected with the solar cells, the third bus bar is located on a side on which a back light surface of the plurality of solar cells arranged in a row lies. The number of the second bus bars is two, and the two second bus bars are arranged at intervals along the first direction, any second bus bar is electrically connected with the first first bus bar and the third bus bar.
[0010] In some possible implementation manners, the number of the third solar cells is two. Two solar cells arranged adjacent along the second direction form a second solar cell group, and the second solar cell group includes a fourth solar cell and a fifth solar cell. The fourth solar cell includes a third chamfer and a third edge, and the third chamfer and the third edge are arranged opposite along the second direction. A shape of an orthographic projection of the fifth solar cell on the XY plane is a rectangle, and along the second direction, the fifth solar cell is arranged on a side on which the third edge lies. Any column of solar cells includes a plurality of first solar cell groups and at least one second solar cell group, the second solar cell group is arranged on a side of the plurality of first solar cell groups along the second direction, and the fourth solar cell is away from the first solar cell group relative to the fifth solar cell.
[0011] In some possible implementation manners, the first bus bars include a second first bus bar, a third first bus bar and a fourth first bus bar. Along the second direction, the second first bus bars are located on one side of the plurality of columns of solar cell pieces, the number of the second first bus bars is two, the two second first bus bars are arranged at intervals along the first direction, and the two second first bus bars are electrically connected to the solar cell pieces respectively. Along the second direction, the third first bus bars are located on a side of the plurality of columns of solar cell pieces away from the second first bus bars, the number of the third first bus bars is two, the two third first bus bars are arranged at intervals along the first direction, and the two third first bus bars are electrically connected to the solar cell pieces respectively. Along the second direction, the fourth first bus bars are located at a junction area of two rows of solar cell pieces arranged adjacently, the number of the fourth first bus bars is two, the two fourth first bus bars are arranged at intervals along the first direction, and the two fourth first bus bars are electrically connected to the solar cell pieces respectively.
[0012] In some possible implementation manners, in the at least one column of solar cell pieces, the second group of solar cell pieces is away from the fourth first bus bar relative to the plurality of first groups of solar cell pieces, and in the at least one column of solar cell pieces, the second group of solar cell pieces is close to the fourth first bus bar relative to the plurality of first groups of solar cell pieces.
[0013] In some possible implementation manners, the photovoltaic module further includes an insulating strip, and the insulating strip is arranged between the second bus bar and the solar cell piece.
[0014] In some possible implementation manners, the photovoltaic module further includes a first glass cover plate and a second glass cover plate. The first glass cover plate is arranged on a side where a back light surface of the solar cell piece is located. The second glass cover plate is arranged on a side where a light receiving surface of the solar cell piece is located.
[0015] To sum up, the embodiments of the present application have at least the following beneficial effects: In the embodiments of the present application, the corner close to the welding point of any one of the plurality of solar cell pieces located on the side of the welding point is chamfered, so that the plurality of solar cell pieces located on the side of the welding point can avoid the welding point, which is beneficial to increase the distance between the solar cell piece and the welding point located on the side of the welding point, so that the welding head for welding the first bus bar and the second bus bar does not need to be in contact with the solar cell piece, thereby reducing the risk of solar cell piece fragmentation caused by the welding process of the first bus bar and the second bus bar, and being beneficial to improve the production yield of the photovoltaic module.
[0016] In addition, the above arrangement is adopted to reduce the influence of the welding process of the first bus bar and the second bus bar on the solar cell piece, without the need to change the position of the welding head for welding the first bus bar and the second bus bar, which is beneficial to improve the welding reliability of the first bus bar and the second bus bar. Moreover, no other components are needed, which is beneficial to reduce the cost of the photovoltaic module. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.
[0018] Figure 1 The structural schematic diagram of a photovoltaic module provided for some embodiments of the present application is shown.
[0019] Figure 2 The structural schematic diagram of a photovoltaic module provided for some embodiments of the present application is shown.
[0020] Figure 3 The corresponding relationship schematic diagram of a whole solar cell and an independent small piece provided for some embodiments of the present application is shown.
[0021] Figure 4 The corresponding relationship schematic diagram of a whole solar cell and an independent small piece provided for some embodiments of the present application is shown.
[0022] Figure 5 The position relationship schematic diagram of a solar cell piece and a solder strip provided for some embodiments of the present application is shown.
[0023] Figure 6 The position relationship schematic diagram of a solar cell piece and a solder strip provided for some embodiments of the present application is shown.
[0024] Figure 7 The equivalent circuit structural schematic diagram of a photovoltaic module provided for some embodiments of the present application is shown.
[0025] Figure 8 The equivalent circuit structural schematic diagram of a photovoltaic module provided for some embodiments of the present application is shown.
[0026] BRIEF DESCRIPTION OF DRAWINGS: 200 - photovoltaic module, 201 - first glass superstate, 203 - solder ribbon, 220 - solar cell, 220a - first solar cell group, 220b - second solar cell group, 221 - first solar cell, 2211 - first chamfer, 2212 - first edge, 222 - second solar cell, 2221 - second chamfer, 2222 - second edge, 223 - third solar cell, 224 - fourth solar cell, 2241 - third chamfer, 2242 - third edge, 225 - fifth solar cell, 211 - first busbar, 2111 - first first busbar, 2112 - second first busbar, 2113 - third first busbar, 2114 - fourth first busbar, 212 - second busbar, 213 - third busbar, 230 - solar cell string, 231 - first solar cell string, 2311 - first sub-string, 2312 - second sub-string, 232 - second solar cell string, 2321 - third sub-string, 2322 - fourth sub-string, 239 - connecting string, 233 - third solar cell string, 2331 - fifth sub-string, 2332 - sixth sub-string, 234 - fourth solar cell string, 2341 - seventh sub-string, 2342 - eighth sub-string, 235 - fifth solar cell string, 2351 - ninth sub-string, 2352 - tenth sub-string, D1 - first diode, D2 - second diode, D3 - third diode, D4 - fourth diode, D5 - fifth diode, D6 - sixth diode, C1 - first power generation unit, C2 - second power generation unit, C3 - third power generation unit, C4 - fourth power generation unit, C41 - first sub-power generation unit, C42 - second sub-power generation unit, C43 - third sub-power generation unit, C5 - fifth power generation unit, C51 - fourth sub-power generation unit, C52 - fifth sub-power generation unit, C53 - sixth sub-power generation unit, X - first direction, Y - second direction, P - soldering point, Q1 - light-receiving surface, Q2 - back surface, 100 - whole solar cell. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0028] In the present application, the terms "upper", "left", "right", "front", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.
[0029] And, in addition to the above-mentioned partial terms can be used to indicate the orientation or position relationship, it may also be used to represent other meanings, for example, the term "upper" in some cases may also be used to represent a certain dependent relationship or connection relationship. For those of ordinary skill in the art, the specific meaning of these terms in this application can be understood according to the specific circumstances.
[0030] In addition, the terms "mounting", "setting", "provided with", "connection" should be broadly understood. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0031] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific type and structure may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.
[0032] Photovoltaic modules can convert light energy (such as solar energy) into electrical energy, thereby realizing photovoltaic power generation. With the continuous development of the photovoltaic industry, the packaging form of photovoltaic modules is gradually upgrading from traditional whole piece packaging to two-piece, three-piece, four-piece, and even any number of piece packaging.
[0033] Taking three-piece packaging as an example, after the production of solar cells is completed, they will be cut into three independent small pieces. A plurality of independent small pieces cut from a plurality of solar cells can be connected in series to form a plurality of cell strings, and these cell strings can be connected in parallel to form a cell string group. Subsequently, through processes such as lamination, a photovoltaic module can be manufactured.
[0034] This piece packaging design can significantly reduce the heat generation of a single cell small piece, effectively reduce the thermal resistance loss, and enable the photovoltaic module to achieve higher power generation and better heat resistance.
[0035] Figure 1 A structural schematic diagram of a photovoltaic module provided for some embodiments of the present application is shown. Figure 2 A structural schematic diagram of a photovoltaic module provided for some embodiments of the present application is shown. Figure 3 A corresponding relationship schematic diagram of a whole piece solar cell and an independent small piece provided for some embodiments of the present application is shown. Figure 4 A corresponding relationship schematic diagram of a whole piece solar cell and an independent small piece provided for some embodiments of the present application is shown.
[0036] As Figure 1 andFigure 2 As shown in
[0037] In some examples, as shown in Figure 1 and Figure 2 The photovoltaic module 200 can include a plurality of solar cell pieces 220.
[0038] As shown in Figure 3 The solar cell piece 220 can be an independent piece cut from the whole solar cell 100 along the dotted line in three equal parts, or as shown in Figure 4 The solar cell piece 220 can also be an independent piece cut from the whole solar cell 100 along the dotted line in four equal parts. Alternatively, the solar cell piece 220 can also be an independent piece cut from the whole solar cell 100 according to two equal parts, five equal parts or six equal parts.
[0039] Continuing to refer to Figure 1 and Figure 2 The plurality of solar cell pieces 220 are arranged in multiple columns along a first direction X and multiple rows along a second direction Y, and the first direction X and the second direction Y are perpendicular.
[0040] It can be understood that the first direction X and the second direction Y can be perpendicular or approximately perpendicular, that is, the included angle between the first direction X and the second direction Y can be 90°, or 88° or 89°, etc.
[0041] Figure 5 A schematic diagram of the positional relationship between the solar cell piece and the solder strip provided by some embodiments of the present application. Figure 6 A schematic diagram of the positional relationship between the solar cell piece and the solder strip provided by some embodiments of the present application.
[0042] As shown in Figure 5 and Figure 6 The solar cell piece 220 includes a light-receiving surface Q1 and a back surface Q2 oppositely arranged along the thickness direction Z of the solar cell piece 220. It can be understood that the light-receiving surface Q1 is used to receive light, and the back surface Q2 can be away from the light.
[0043] The light-receiving surface Q1 can be provided with a positive electrode pad, and the back surface Q2 can be provided with a negative electrode pad. As an example, the solar cell piece 220 with the positive electrode pad arranged on the light-receiving surface Q1 and the negative electrode pad arranged on the back surface Q2 is called a tunnel oxide passivated contact solar cell (TOPCON). Alternatively, the positive electrode pad and the negative electrode pad can also be arranged on the back surface Q2. As an example, the positive electrode pad and the negative electrode pad can be arranged on the back surface Q2 of the solar cell piece 220, which is called a back contact solar cell.
[0044] As shown in Figure 5 and Figure 6 , as an example, the photovoltaic module 200 can further include a solder strip 203, and two solar cell pieces 220 arranged adjacent to each other along the second direction Y are electrically connected by the solder strip 203.
[0045] Taking the solar cell piece 220 as a TOPCON solar cell, as shown in Figure 5 , when the two solar cell pieces 220 arranged adjacent to each other along the second direction Y are spaced apart, one end of the solder strip 203 can be located on the light-receiving surface Q1 of one solar cell piece 220 and electrically connected to the positive electrode pad, and the other end of the solder strip 203 can be located on the back surface Q2 of the other solar cell piece 220 and electrically connected to the negative electrode pad.
[0046] As shown in Figure 6 , when the two solar cell pieces 220 arranged adjacent to each other along the second direction Y are stacked, that is, the light-receiving surface Q1 of one solar cell piece 220 and the back surface Q2 of the other solar cell piece 220 partially overlap, along the thickness direction Z of the solar cell piece 220, a part of the solder strip 203 can be located between the two solar cell pieces 220 and electrically connected to the positive electrode pad of one solar cell piece 220 and the negative electrode pad of the other solar cell piece 220.
[0047] The two solar cell pieces 220 arranged adjacent to each other along the second direction Y can be electrically connected by a plurality of solder strips 203, and the plurality of solder strips 203 can be spaced apart along the first direction X.
[0048] As shown in Figure 1 and Figure 2 , the plurality of solar cell pieces 220 arranged in a column along the second direction Y can be electrically connected by the solder strip 203 to form a solar cell string 230, and the plurality of solar cell pieces 220 are arranged in multiple columns along the first direction X, that is, the plurality of solar cell strings 230 are spaced apart along the first direction X. It can be understood that, in order to simplify the structure of the drawing, Figure 1 and Figure 2 , the solder strip 203 is not shown in
[0049] In some examples, as shown in Figure 1 and Figure 2 , the photovoltaic module 200 further includes a first bus bar 211 and a second bus bar 212.
[0050] It can be understood that the bus bar is used for transmitting current. The material of the bus bar can include at least one of copper and aluminum, and the materials of the first bus bar 211 and the second bus bar 212 can be the same or different, and the embodiments of the present application do not make further limitation on the material of the bus bar.
[0051] With reference to the foregoing Figure 1 and Figure 2 In some examples, the first bus bar 211 extends along the first direction X, and the first bus bar 211 and the solar cell 220 are electrically connected.
[0052] The first bus bar 211 and the solar cell 220 can be electrically connected through a solder strip 203 or a wire, and the embodiments of the present application do not make further limitation on the mode of electrical connection between the first bus bar 211 and the solar cell 220.
[0053] In some examples, as shown in Figure 1 and Figure 2 along the second direction Y, the first bus bar 211 is located at the boundary area of two rows of solar cells 220 arranged adjacently, and the first bus bar 211 is located at the side of the back surface Q2 of the solar cell 220.
[0054] It can be understood that the boundary area of two rows of solar cells 220 arranged adjacently includes the gap between two rows of solar cells 220 arranged adjacently along the second direction Y, and the edge area of two rows of solar cells 220 arranged adjacently along the second direction Y.
[0055] Along the second direction Y, the first bus bar 211 is located at the boundary area of two rows of solar cells 220 arranged adjacently, and the first bus bar 211 is located at the side of the back surface Q2 of the solar cell 220, which can avoid the first bus bar 211 from blocking the light irradiated to the light-receiving surface Q1, and enable the first bus bar 211 to reflect the light irradiated between two rows of solar cells 220 to the light-receiving surface Q1 of the solar cell 220, so as to improve the light utilization rate, reduce the risk of light leakage of the photovoltaic module 200, and facilitate to improve the output power of the photovoltaic module 200.
[0056] In other examples, as shown in Figure 1 and Figure 2 along the second direction Y, the first bus bar 211 is located at one side of the plurality of columns of solar cells 220. In this way, the mutual influence between the first bus bar 211 and the solar cell 220 can be reduced.
[0057] It can be understood that, along the second direction Y, the first bus bar 211 is located at the junction area of the two rows of solar cell pieces 220 arranged adjacently, and the first bus bar 211 is located at the side where the back surface Q2 of the solar cell piece 220 is located, and / or, along the second direction Y, the first bus bar 211 is located at one side of the plurality of columns of solar cell pieces 220, which can improve the flexibility of the setting position of the first bus bar 211, and meet the different electrical connection requirements of the plurality of solar cell pieces 220.
[0058] For example, the number of the first bus bar 211 can be multiple. Along the second direction Y, one first bus bar 211 can be located at the junction area of the two rows of solar cell pieces 220 arranged adjacently, and another first bus bar 211 can be located at one side of the plurality of columns of solar cell pieces 220.
[0059] Continuing to refer to Figure 1 and Figure 2 In some examples, the second bus bar 212 extends along the second direction Y, and the second bus bar 212 is electrically connected with the solar cell piece 220.
[0060] The second bus bar 212 and the solar cell piece 220 can be electrically connected through a solder strip 203 or a wire, and the embodiments of the present application do not further limit the electrical connection mode between the second bus bar 212 and the solar cell piece 220.
[0061] In some examples, as shown in Figure 1 and Figure 2 Along the first direction X, the second bus bar 212 is located at the junction area of the two columns of solar cell pieces 220 arranged adjacently, and the second bus bar 212 is located at the side where the back surface Q2 of the solar cell piece 220 is located.
[0062] Along the first direction X, the second bus bar 212 is located at the junction area of the two columns of solar cell pieces 220 arranged adjacently, and the second bus bar 212 is located at the side where the back surface Q2 of the solar cell piece 220 is located, which can avoid that the second bus bar 212 blocks the light irradiated to the light-receiving surface Q1, and make the second bus bar 212 reflect the light irradiated between the two columns of solar cell pieces 220 to the light-receiving surface Q1 of the solar cell piece 220, so as to improve the light utilization rate, reduce the risk of light leakage of the photovoltaic module 200, and facilitate to improve the output power of the photovoltaic module 200.
[0063] In some examples, along the thickness direction Z of the solar cell piece 220, the second bus bar 212 is arranged at one side of the first bus bar 211.
[0064] For example, the second bus bar 212 can be closer to the solar cell 220 relative to the first bus bar 211, or the second bus bar 212 can be farther away from the solar cell 220 relative to the first bus bar 211, and the embodiments of the present application do not make further limitations thereon.
[0065] It can be understood that in the welding process of the first bus bar 211 and the second bus bar 212, the welding head will extrude the solar cell 220, increasing the risk of the solar cell 220 being broken and affecting the production yield of the photovoltaic module 200.
[0066] Based on this, in the embodiments of the present application, as shown in Figure 1 and Figure 2 , the position where the second bus bar 212 and the first bus bar 211 intersect is a welding point P, and among the plurality of solar cells 220 located on the side of the welding point P, the corner portion of any solar cell 220 close to the welding point P is chamfered.
[0067] For example, as shown in Figure 1 and Figure 2 , so that the chamfered corners of the plurality of solar cells 220 located on the side of the welding point P can surround an avoidance area, and the welding point P can be located in the avoidance area.
[0068] In the embodiments of the present application, among the plurality of solar cells 220 located on the side of the welding point P, the corner portion of any solar cell 220 close to the welding point P is chamfered, so that the plurality of solar cells 220 located on the side of the welding point P can avoid the welding point P, which is beneficial to increase the distance between the solar cells 220 located on the side of the welding point P and the welding point P, so that the welding head for welding the first bus bar 211 and the second bus bar 212 does not need to be in contact with the solar cell 220, reducing the risk of the solar cell 220 being broken caused by the welding process of the first bus bar 211 and the second bus bar 212, and being beneficial to improve the production yield of the photovoltaic module 200.
[0069] In addition, the above setting mode is adopted to reduce the influence of the welding process of the first bus bar 211 and the second bus bar 212 on the solar cell 220, without the need to change the position of the welding head for welding the first bus bar 211 and the second bus bar 212, which is beneficial to improve the welding reliability of the first bus bar 211 and the second bus bar 212. Moreover, without the need to add other components, it is beneficial to reduce the cost of the photovoltaic module 200.
[0070] Continuing to refer to Figure 3 and Figure 4 , in some examples, the at least two solar cells 220 arranged adjacent in the second direction Y form a first solar cell group 220a, and the first solar cell group 220a includes the first solar cell 221 and the second solar cell 222.
[0071] As shown in Figure 3 and Figure 4 , the first solar cell piece 221 includes a first chamfer 2211 and a first edge 2212, the first chamfer 2211 and the first edge 2212 are oppositely arranged along the second direction Y. The second solar cell piece 222 includes a second chamfer 2221 and a second edge 2222, the second chamfer 2221 and the second edge 2222 are oppositely arranged along the second direction Y.
[0072] For example, the number of the first chamfers 2211 can be two, the two first chamfers 2211 can be oppositely arranged along the first direction X. The number of the second chamfers 2221 can be two, the two second chamfers 2221 can be oppositely arranged along the first direction X.
[0073] It can be understood that the first solar cell piece 221 and the second solar cell piece 222 are arranged along the second direction Y. In some examples, as shown in Figure 3 and Figure 4 , along the second direction Y, the first chamfer 2211 is away from the second solar cell piece 222 relative to the first edge 2212, and the second chamfer 2221 is away from the first solar cell piece 221 relative to the second edge 2222.
[0074] With the above arrangement, the arrangement regularity of the solar cell pieces 220 in the first solar cell piece group 220a can be improved, so that the regularity of the closed figure surrounded by the outer contour of the first solar cell piece group 220a can be improved. For example, the closed figure surrounded by the outer contour of the first solar cell piece group 220a can be an octagon or an approximate octagon.
[0075] Continuing to refer to Figure 3 and Figure 4 , in some examples, the first solar cell piece group 220a further includes a third solar cell piece 223, the third solar cell piece 223 has a rectangular shape in orthographic projection on an XY plane, the XY plane being a plane on which the first direction X and the second direction Y lie.
[0076] For example, the thickness direction Z of the solar cell piece 220 is perpendicular or approximately perpendicular to the XY plane, that is, the included angle between the thickness direction Z of the solar cell piece 220 and the XY plane can be 90°, or can be 88° or 89°.
[0077] It can be understood that the third solar cell piece 223 can have a rectangular shape or an approximate rectangular shape in orthographic projection on the XY plane.
[0078] Continuing to refer to Figure 1 and Figure 1In some examples, the third solar cell piece 223 is located between the first solar cell piece 221 and the second solar cell piece 222 along the second direction Y.
[0079] The number of the third solar cell piece 223 can be one or more. When the number of the third solar cell piece 223 is one, the three solar cell pieces 220 in the first solar cell piece group 220a can be three independent small pieces cut from the whole solar cell 100 in a three-equal-division manner.
[0080] When the number of the third solar cell piece 223 is two, the four solar cell pieces 220 in the first solar cell piece group 220a can be four independent small pieces cut from the whole solar cell 100 in a four-equal-division manner.
[0081] When the number of the third solar cell piece 223 is three, the five solar cell pieces 220 in the first solar cell piece group 220a can be five independent small pieces cut from the whole solar cell 100 in a five-equal-division manner.
[0082] It can be understood that the number of the third solar cell piece 223 is not limited further in the embodiments of the present application.
[0083] The first solar cell piece group 220a includes the third solar cell piece 223, so that the multiple independent small pieces cut from the whole solar cell 100 can be used, reducing material waste and helping to reduce the cost of the photovoltaic module 200.
[0084] The third solar cell piece 223 is located between the first solar cell piece 221 and the second solar cell piece 222, which can improve the arrangement regularity of the solar cell pieces 220 in the first solar cell piece group 220a, thereby improving the regularity of the closed figure surrounded by the outer contour of the first solar cell piece group 220a.
[0085] In some examples, as shown in FIG. 2B, the first solar cell piece group 220a includes one third solar cell piece 223, and any column of solar cell pieces 220 includes multiple first solar cell piece groups 220a. Figure 1
[0086] It can be understood that the three solar cell pieces 220 in the first solar cell piece group 220a are three independent small pieces cut from the whole solar cell 100 in a three-equal-division manner. One column of solar cell pieces 220 can include 11 first solar cell piece groups 220a, that is, one column of solar cell pieces 220 can include 33 solar cell pieces 220, and the 33 solar cell pieces 220 form 11 first solar cell piece groups 220a.
[0087] Alternatively, the column of solar cell pieces 220 can also include other numbers of the first solar cell piece groups 220a, such as 10, 12, or 13, etc.
[0088] In the drawings of the specification of the present application, Figure 7 For example, in order to simplify the structure of the drawings, it is shown that the column of solar cell pieces 220 includes 6 first solar cell piece groups 220a, and the embodiments of the present application do not further limit the number of the first solar cell piece groups 220a in the column of solar cell pieces 220.
[0089] It can be understood that any column of solar cell pieces 220 includes a plurality of first solar cell piece groups 220a, which can improve the arrangement regularity of the plurality of columns of solar cell pieces 220. In this way, the light-receiving surface Q1 area of the solar cell pieces 220 in different columns can be substantially the same, so as to improve the balance of the output power of the solar cell pieces 220 in different columns.
[0090] For example, the plurality of first solar cell piece groups 220a can be arranged along the second direction Y, and then the solder strip 203 and the two solar cell pieces 220 arranged adjacent along the second direction Y are welded.
[0091] Next, taking one as an example, the number of the third solar cell piece 223, the electrical connection relationship between the plurality of solar cell pieces 220 and the bus bar is exemplarily described.
[0092] For example, as shown in Figure 7 The plurality of solar cell strings 230 include a plurality of first solar cell strings 231 and a plurality of second solar cell strings 232. The plurality of first solar cell strings 231 are arranged adjacent along the first direction X, the plurality of second solar cell strings 232 are arranged adjacent along the first direction X, and along the first direction X, the plurality of second solar cell strings 232 are arranged on one side of the plurality of first solar cell strings 231.
[0093] It can be understood that the number of the first solar cell strings 231 and the second solar cell strings 232 can be equal or not equal, and the embodiments of the present application do not further limit the number of the first solar cell strings 231 and the second solar cell strings 232.
[0094] The first solar cell string 231 includes a first sub-string 2311 and a second sub-string 2312 arranged along the second direction Y, and the first sub-string 2311 and the second sub-string 2312 are electrically connected. The number of the solar cell pieces 220 in the first sub-string 2311 and the second sub-string 2312 can be equal or not equal.
[0095] The second solar cell string 232 can include a third sub-string 2321 and a fourth sub-string 2322 arranged along the second direction Y, and the third sub-string 2321 and the fourth sub-string 2322 are electrically connected. The number of solar cell pieces 220 in the third sub-string 2321 and the fourth sub-string 2322 can be equal or not equal.
[0096] Figure 7 An equivalent circuit structure schematic diagram of a photovoltaic module provided for some embodiments of the present application.
[0097] As shown in Figure 7 a plurality of first sub-strings 2311 in the plurality of first solar cell strings 231 are connected in parallel to form a first power generation part C1. A plurality of third sub-strings 2321 in the plurality of second solar cell strings 232 are connected in parallel to form a second power generation part C2. The second sub-string 2312 and the fourth sub-string 2322 are connected in series to form a connecting string 239, and a plurality of connecting strings 239 are connected in parallel to form a third power generation part C3.
[0098] The positive electrode of the first power generation part C1 can be connected to the negative electrode of the third power generation part C3, and the positive electrode of the third power generation part C3 can be connected to the negative electrode of the second power generation part C2, that is, the first power generation part C1, the third power generation part C3 and the second power generation part C2 can be connected in series.
[0099] It can be understood that the negative electrode of the first power generation part C1 is the negative electrode of the photovoltaic module 200, and the positive electrode of the second power generation part C2 is the positive electrode of the photovoltaic module 200.
[0100] Continuing to refer to Figure 1 In some examples, the first bus bar 211 includes a first first bus bar 2111, and the photovoltaic module 200 can further include a third bus bar 213.
[0101] Along the second direction Y, the first first bus bar 2111 is located on one side of the plurality of rows of solar cell pieces 220, and the number of the first first bus bar 2111 is two, and the two first first bus bars 2111 are arranged at intervals along the first direction X.
[0102] The third bus bar 213 extends along the first direction X, and the third bus bar 213 is electrically connected to the solar cell piece 220, and the third bus bar 213 is located on one side of the back light surface Q2 of the plurality of solar cell pieces 220 arranged in a row.
[0103] The number of the second bus bar 212 is two, and the two second bus bars 212 are arranged at intervals along the first direction X, and any one of the second bus bars 212 is electrically connected to the first first bus bar 2111 and the third bus bar 213.
[0104] For example, one of the first bus bars 2111 can be connected with the negative electrode of the first generating section C1, and the other of the first bus bars 2111 can be connected with the positive electrode of the second generating section C2. In this way, other components and the two first bus bars 2111 are electrically connected, i.e., are electrically connected with the positive electrode and the negative electrode of the photovoltaic module 200. The third bus bar 213 can be electrically connected with the anode and the cathode of the third generating section C3.
[0105] As shown in FIG. 2, the photovoltaic module 200 can further include a first diode D1, a second diode D2, and a third diode D3. Figure 2
[0106] The anode of the first diode D1 can be electrically connected with the negative electrode of the first generating section C1 through a second bus bar 212, and the cathode of the first diode D1 can be electrically connected with the positive electrode of the first generating section C1 through the second bus bar 212.
[0107] The anode of the second diode D2 can be electrically connected with the negative electrode of the second generating section C2 through another second bus bar 212, and the cathode of the second diode D2 can be electrically connected with the positive electrode of the second generating section C2 through the second bus bar 212.
[0108] The anode of the third diode D3 can be electrically connected with the negative electrode of the third generating section C3 through a third bus bar 213, and the cathode of the third diode D3 can be electrically connected with the positive electrode of the third generating section C3 through the third bus bar 213.
[0109] For example, the third bus bar 213 and the second bus bar 212 can be bypass bus bars. When the photovoltaic module 200 is normally working, no current flows through the third bus bar 213 and the second bus bar 212.
[0110] When the first sub-string 2311 is shaded by foreign matter, the first diode D1 can be turned on, and bypass current can flow through one of the second bus bars 212. When the third sub-string 2321 is shaded by foreign matter, the second diode D2 can be turned on, and bypass current can flow through the other of the second bus bars 212. When the connecting string 239 is shaded by foreign matter, the third diode D3 can be turned on, and bypass current can flow through the third bus bar 213.
[0111] The first bus bar 2111 and the third bus bar 213 are electrically connected in the above-described manner, which can reduce the risk of hot spot causing the solar cell 220 to be damaged, and is conducive to improving the use reliability of the photovoltaic module 200.
[0112] It can be understood that the third bus bar 213 is located on the side of the back light surface Q2 of the plurality of solar cells 220 arranged in a row, i.e., as shown in FIG. 2, the third bus bar 213 is located on the side of the back light surface Q2 of the plurality of solar cells 220 arranged in a row. Figure 2 As shown, the third bus bar 213 is staggered with the junction area of the two rows of solar cell pieces 220 arranged adjacently.
[0113] In an example, the third bus bar 213 and the first first bus bar 2111 can be welded first, and then placed on the back surface Q2 of the solar cell piece 220, so as to reduce the impact of the welding process of the third bus bar 213 and the first first bus bar 2111 on the solar cell piece 220.
[0114] In some examples, as shown in FIG. 2, the first first bus bar 2111 is arranged on the first side Q1 of the solar cell piece 220. Figure 1 As shown, the number of the third solar cell piece 223 is two. It can be understood that the four solar cell pieces 220 in the first solar cell piece group 220a are four independent small pieces cut by four equal parts of the whole solar cell 100.
[0115] The two solar cell pieces 220 arranged adjacently along the second direction Y form a second solar cell piece group 220b, and the second solar cell piece group 220b includes a fourth solar cell piece 224 and a fifth solar cell piece 225.
[0116] The fourth solar cell piece 224 includes a third chamfer 2241 and a third edge 2242, and the third chamfer 2241 and the third edge 2242 are arranged oppositely along the second direction Y.
[0117] In an example, the number of the third chamfer 2241 can be two, and the two third chamfers 2241 can be arranged oppositely along the first direction X.
[0118] The fifth solar cell piece 225 has a rectangular shape in the XY plane, and it can be understood that the fifth solar cell piece 225 can have a rectangular or approximately rectangular shape in the XY plane. The area of the fifth solar cell piece 225 in the XY plane can be the same or approximately the same as the area of the third solar cell piece 223 in the XY plane. Along the second direction Y, the fifth solar cell piece 225 is arranged on the side where the third edge 2242 is located.
[0119] Continuing to refer to Figure 2 In some examples, any column of solar cell pieces 220 includes a plurality of first solar cell piece groups 220a and at least one second solar cell piece group 220b, the second solar cell piece group 220b is arranged on one side of the plurality of first solar cell piece groups 220a along the second direction Y, and the fourth solar cell piece 224 is away from the first solar cell piece group 220a relative to the fifth solar cell piece 225.
[0120] For example, the one column of solar cell pieces 220 can include 5 first solar cell piece groups 220a, or the one column of solar cell pieces 220 can also include 6, 7, 8, 9 or 10 first solar cell piece groups 220a. And the one column of solar cell pieces 220 can include 2 second solar cell piece groups 220b, or the one column of solar cell pieces 220 can also include 1, 3 or 4 second solar cell piece groups 220b.
[0121] In the drawings of the specification of the present application, Figure 2 For example, in order to simplify the structure of the drawings, it is shown that the one column of solar cell pieces 220 includes 4 first solar cell piece groups 220a and 2 second solar cell piece groups 220b, and the embodiments of the present application do not further limit the number of first solar cell piece groups 220a and second solar cell piece groups 220b in the one column of solar cell pieces 220.
[0122] It can be understood that any one column of solar cell pieces 220 includes a plurality of first solar cell piece groups 220a and at least one second solar cell piece group 220b, which can improve the regularity of the arrangement of the plurality of columns of solar cell pieces 220. In this way, the light-receiving surface Q1 area of the solar cell pieces 220 in different columns can be substantially the same, so as to improve the balance of the output power of the solar cell pieces 220 in different columns.
[0123] For example, the plurality of first solar cell piece groups 220a and the at least one second solar cell piece group 220b can be arranged along the second direction Y, and then the solder strip 203 and the two solar cell pieces 220 arranged adjacent along the second direction Y are welded.
[0124] The second solar cell piece group 220b includes the fourth solar cell piece 224 and the fifth solar cell piece 225, so that the plurality of independent small pieces cut from the whole solar cell 100 can be used, reducing material waste and being conducive to reducing the cost of the photovoltaic module 200.
[0125] It can be understood that the fourth solar cell piece 224 is away from the first solar cell piece group 220a relative to the fifth solar cell piece 225, and the fifth solar cell piece 225 is arranged on the side where the third edge 2242 is located, so that the third chamfer 2241 can be located on the side of the fifth solar cell piece 225 away from the first solar cell piece group 220a, which is conducive to improving the regularity of the closed figure surrounded by the outer contours of the first solar cell piece group 220a and the second solar cell piece group 220b.
[0126] Hereinafter, the number of the third solar cell piece 223 is taken as two as an example to illustrate the electrical connection relationship between the plurality of solar cell pieces 220 and the bus bar.
[0127] For example, as Figure 8As shown, the solar cell string 230 may include multiple third solar cell strings 233, multiple fourth solar cell strings 234, and multiple fifth solar cell strings 235.
[0128] Multiple third solar cell strings 233 are arranged adjacent to each other along the first direction X, multiple fourth solar cell strings 234 are arranged adjacent to each other along the first direction X, and multiple fifth solar cell strings 235 are arranged adjacent to each other along the first direction X. Along the first direction X, the multiple third solar cell strings 233, multiple fourth solar cell strings 234 and multiple fifth solar cell strings 235 are arranged sequentially.
[0129] The number of the third solar cell string 233, the fourth solar cell string 234, and the fifth solar cell string 235 may be equal or unequal. The embodiments of this application do not further limit the number of the third solar cell string 233, the fourth solar cell string 234, and the fifth solar cell string 235.
[0130] Continue to refer to Figure 8 The third solar cell string 233 may include a fifth substring 2331 and a sixth substring 2332 arranged along the second direction Y, and the fifth substring 2331 and the sixth substring 2332 are electrically connected. The number of solar cells 220 in the fifth substring 2331 and the sixth substring 2332 may be equal or unequal.
[0131] The fourth solar cell string 234 may include a seventh substring 2341 and an eighth substring 2342 arranged along the second direction Y, and the seventh substring 2341 and the eighth substring 2342 are electrically connected. The number of solar cells 220 in the seventh substring 2341 and the eighth substring 2342 may be equal or unequal.
[0132] The fifth solar cell string 235 may include a ninth substring 2351 and a tenth substring 2352 arranged along the second direction Y, and the ninth substring 2351 and the tenth substring 2352 are electrically connected. The number of solar cells 220 in the ninth substring 2351 and the tenth substring 2352 may be equal or unequal.
[0133] Figure 2 This is a schematic diagram of the equivalent circuit structure of a photovoltaic module provided in some other embodiments of this application.
[0134] For example, such as Figure 8 As shown, multiple fifth substrings 2331 can be connected in parallel to form the first sub-generator C41, multiple seventh substrings 2341 can be connected in parallel to form the second sub-generator C42, and multiple ninth substrings 2351 can be connected in parallel to form the third sub-generator C43. The first sub-generator C41, the second sub-generator C42, and the third sub-generator C43 can be connected in series to form the fourth generator C4.
[0135] The plurality of sixth sub-strings 2332 can be connected in parallel to form a fourth sub-power generation unit C51, the plurality of eighth sub-strings 2342 can be connected in parallel to form a fifth sub-power generation unit C52, and the plurality of tenth sub-strings 2352 can be connected in parallel to form a sixth sub-power generation unit C53. The fourth sub-power generation unit C51, the fifth sub-power generation unit C52, and the sixth sub-power generation unit C53 can be connected in series to form a fifth power generation unit C5. The fourth power generation unit C4 and the fifth power generation unit C5 can be connected in parallel.
[0136] In some examples, as shown in FIG. 11, the first bus bar 211 includes a second first bus bar 2112, a third first bus bar 2113, and a fourth first bus bar 2114. Figure 2
[0137] In the second direction Y, the second first bus bar 2112 is located on one side of the plurality of columns of solar cell pieces 220, and the number of the second first bus bar 2112 is two. The two second first bus bars 2112 are arranged at intervals in the first direction Y, and the two second first bus bars 2112 are respectively electrically connected to the solar cell pieces 220.
[0138] In some examples, as shown in FIG. 11, the number of the second bus bar 212 is two, and the two second bus bars 212 are arranged at intervals in the first direction X. One second first bus bar 2112 can be electrically connected to the positive electrode of the first sub-power generation unit C41, the negative electrode of the second sub-power generation unit C42, the positive electrode of the fourth sub-power generation unit C51, and the negative electrode of the fifth sub-power generation unit C52. Another second first bus bar 2112 can be electrically connected to the negative electrode of the third sub-power generation unit C43 and the negative electrode of the sixth sub-power generation unit C53. Figure 8 Figure 2 In some examples, as shown in FIG. 11, in the second direction Y, the third first bus bar 2113 is located on a side of the plurality of columns of solar cell pieces 220 away from the second first bus bar 2112, and the number of the third first bus bar 2113 is two. The two third first bus bars 2113 are arranged at intervals in the first direction X, and the two third first bus bars 2113 are respectively electrically connected to the solar cell pieces 220.
[0139] In some examples, as shown in FIG. 11, one third first bus bar 2113 can be electrically connected to the positive electrode of the fourth sub-power generation unit C51 and the negative electrode of the fifth sub-power generation unit C52. Another third first bus bar 2113 can be electrically connected to the negative electrode of the sixth sub-power generation unit C53. Figure 8 In some examples, as shown in FIG. 11, one third first bus bar 2113 can be electrically connected to the positive electrode of the fourth sub-power generation unit C51 and the negative electrode of the fifth sub-power generation unit C52. Another third first bus bar 2113 can be electrically connected to the negative electrode of the sixth sub-power generation unit C53.
[0140] Figure 8 As shown, along the second direction Y, the fourth first busbar 2114 is located at the boundary area of two adjacent rows of solar cells 220. There are two fourth first busbars 2114, which are spaced apart along the first direction X. The two fourth first busbars 2114 are electrically connected to the solar cells 220 respectively.
[0141] For example, such as Figure 2 As shown, a fourth first busbar 2114 can be electrically connected to the negative terminal of the first sub-generator C41, the positive terminal of the second sub-generator C42, the negative terminal of the fourth sub-generator C51, and the positive terminal of the fifth sub-generator C52. Another fourth first busbar 2114 can be electrically connected to the positive terminal of the third sub-generator C43 and the positive terminal of the sixth sub-generator C53.
[0142] There can be two second busbars 212, which are spaced apart along the first direction X. The second busbars 212 are electrically connected to the second first busbar 2111, the third first busbar 2113, and the fourth first busbar 2114.
[0143] Continue to refer to Figure 2 For example, photovoltaic module 200 may also include a fourth diode D4, a fifth diode D5, and a sixth diode D6.
[0144] The anode of the fourth diode D4 can be electrically connected to the cathode of the first sub-generator C41 and the cathode of the fourth sub-generator C51, and the cathode of the fourth diode D4 can be electrically connected to the anode of the first sub-generator C41 and the anode of the fourth sub-generator C51. The anode of the fifth diode D5 can be electrically connected to the cathode of the second sub-generator C42 and the cathode of the fifth sub-generator C52, and the cathode of the fifth diode D5 can be electrically connected to the anode of the second sub-generator C42 and the anode of the fifth sub-generator C52. The cathode of the sixth diode D6 can be electrically connected to the cathode of the third sub-generator C43 and the cathode of the sixth sub-generator C53, and the anode of the sixth diode D6 can be electrically connected to the anode of the third sub-generator C43 and the anode of the sixth sub-generator C53.
[0145] For example, the second busbar 212, which is electrically connected to the first sub-generator C41 and the fourth sub-generator C51, can be a bypass busbar. No current flows through this second busbar 212 when the photovoltaic module 200 is operating normally.
[0146] It can be understood that the fourth diode D4 can be turned on when at least one of the fifth sub-string 2331 and the sixth sub-string 2332 is blocked by foreign matter. The fifth diode D5 can be turned on when at least one of the seventh sub-string 2341 and the eighth sub-string 2342 is blocked by foreign matter. The sixth diode D6 can be turned on when at least one of the ninth sub-string 2351 and the tenth sub-string 2352 is blocked by foreign matter.
[0147] The first bus bar 211 and the second bus bar 212 are electrically connected in the above manner, which can reduce the risk of hot spot causing damage to the solar cell 220, and facilitate to improve the use reliability of the photovoltaic module 200.
[0148] Continuing to refer to Figure 1 In some examples, in the at least one row of solar cell pieces 220, the second solar cell piece group 220b is away from the fourth first bus bar 2114 relative to the plurality of first solar cell piece groups 220a, and in the at least one row of solar cell pieces 220, the second solar cell piece group 220b is close to the fourth first bus bar 2114 relative to the plurality of first solar cell piece groups 220a. As shown in the example, Figure 2 As shown in the example, in the third solar cell string 233 and the fourth solar cell string 234, the second solar cell piece group 220b can be away from the fourth first bus bar 2114 relative to the plurality of first solar cell piece groups 220a. In the fifth solar cell string 235, the second solar cell piece group 220b can be close to the fourth first bus bar 2114 relative to the plurality of first solar cell piece groups 220a. By using the above arrangement, the four sub-pieces cut from the whole solar cell 100 can be used, reducing material waste and facilitating to reduce the cost of the photovoltaic module 200.
[0149] In some examples, the photovoltaic module 200 further includes an insulating strip (not shown in the figure), which is arranged between the second bus bar 212 and the solar cell piece 220.
[0150] It can be understood that the insulating strip is an insulating member and can play an electrical isolation role. The first insulating strip is arranged between the second bus bar 212 and the solar cell piece 220, which can reduce the risk of short circuit between the second bus bar 212 and the solar cell piece 220, and improve the use reliability of the photovoltaic module 200.
[0151] In some examples, as shown in the example, and As shown in the example, the photovoltaic module 200 further includes a first glass cover plate 201 and a second glass cover plate (not shown in the figure). The first glass cover plate 201 is arranged on the side where the back light surface Q2 of the solar cell piece 220 is located, and the second glass cover plate is arranged on the side where the light receiving surface Q1 of the solar cell piece 220 is located.
[0152] It can be understood that the first glass cover plate 201 and the second glass cover plate can protect the solar cell 220 and reduce the risk of damage to the solar cell 220. For example, the photovoltaic module 200 can further include a first adhesive film and a second adhesive film. The first glass cover plate 201 can be bonded to the solar cell 220 through the first adhesive film, and the second glass cover plate can be bonded to the solar cell 220 through the second adhesive film.
[0153] For example, the photovoltaic module 200 can further include a junction box (not shown in the figure). The junction box can be arranged on the side of the first glass cover plate 201 away from the solar cell 220.
[0154] For example, the photovoltaic module 200 can further include a junction box (not shown in the figure). The junction box can be arranged on the side of the first glass cover plate 201 away from the solar cell 220.
[0155] For example, the photovoltaic module 200 can further include a junction box (not shown in the figure). The junction box can be arranged on the side of the first glass cover plate 201 away from the solar cell 220.
[0156] For example, the photovoltaic module 200 can further include a junction box (not shown in the figure). The junction box can be arranged on the side of the first glass cover plate 201 away from the solar cell 220.
[0157] For example, the photovoltaic module 200 can further include a junction box (not shown in the figure). The junction box can be arranged on the side of the first glass cover plate 201 away from the solar cell 220.
[0158] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A photovoltaic module, characterized in that, include: Multiple solar cells are arranged in multiple columns along a first direction and in multiple rows along a second direction, wherein the first direction and the second direction are perpendicular. A first busbar extends along the first direction and is electrically connected to the solar cell. Along the second direction, the first busbar is located at the boundary region between two adjacent rows of solar cells, and is located on the side where the back surface of the solar cell is located. Alternatively, along the second direction, the first busbar is located on one side of multiple rows of solar cells. The second busbar extends along the second direction and is electrically connected to the solar cell. Along the first direction, the second busbar is located at the junction of two adjacent rows of solar cells and is located on the side where the back surface of the solar cell is located. Along the thickness direction of the solar cell, the second busbar is disposed on one side of the first busbar, and the intersection of the second busbar and the first busbar is a welding point. Among the multiple solar cells located around the welding point, the corner of any solar cell near the welding point is chamfered.
2. The photovoltaic module according to claim 1, characterized in that, At least two solar cells arranged adjacent to each other along the second direction form a first solar cell group, the first solar cell group comprising: A first solar cell includes a first chamfer and a first edge, the first chamfer and the first edge being disposed opposite to each other along a second direction; The second solar cell includes a second chamfer and a second edge, the second chamfer and the second edge being disposed opposite to each other along the second direction; Along the second direction, the first chamfer is farther away from the second solar cell relative to the first edge, and the second chamfer is farther away from the first solar cell relative to the second edge.
3. The photovoltaic module according to claim 2, characterized in that, The first solar cell array also includes a third solar cell, the shape of which is a rectangle when projected onto the XY plane, the XY plane being the plane containing the first direction and the second direction; Along the second direction, the third solar cell is located between the first solar cell and the second solar cell.
4. The photovoltaic module according to claim 3, characterized in that, The first solar cell array includes one of the third solar cells, and any column of solar cells includes multiple first solar cell arrays.
5. The photovoltaic module according to claim 4, characterized in that, The first busbar includes a first busbar along the second direction. The first busbar is located on one side of the multiple rows of solar cells. There are two first busbars, and the two first busbars are spaced apart along the first direction. The photovoltaic module further includes a third busbar, which extends along the first direction and is electrically connected to the solar cells. The third busbar is located on one side of the back surface of the plurality of solar cells arranged in a row. The number of the second busbars is two, and the two second busbars are spaced apart along the first direction. Each of the second busbars is electrically connected to the first busbar and the third busbar.
6. The photovoltaic module according to claim 3, characterized in that, The number of the third solar cell is two; Two solar cells arranged adjacent to each other along the second direction form a second solar cell group, the second solar cell group comprising: The fourth solar cell includes a third chamfer and a third edge, the third chamfer and the third edge being disposed opposite to each other along the second direction; The fifth solar cell has a rectangular shape when projected onto the XY plane, and is disposed on one side of the third edge along the second direction; Each of the solar cells in a column includes a plurality of first solar cell groups and at least one second solar cell group, the second solar cell group being disposed on one side of the plurality of first solar cell groups along the second direction, and the fourth solar cell being located away from the first solar cell groups relative to the fifth solar cell.
7. The photovoltaic module according to claim 6, characterized in that, The first bus bar includes: The second first busbar is located on one side of the multiple rows of solar cells along the second direction. There are two second first busbars, which are spaced apart along the first direction and are electrically connected to the solar cells respectively. The third first busbar is located along the second direction on the side of the multiple rows of solar cells away from the second first busbar. There are two third first busbars, which are spaced apart along the first direction and are electrically connected to the solar cells respectively. The fourth first busbar is located along the second direction at the boundary between two adjacent rows of solar cells. There are two fourth first busbars, which are spaced apart along the first direction and are electrically connected to the solar cells respectively.
8. The photovoltaic module according to claim 7, characterized in that, In at least one column of the solar cells, the second solar cell group is located away from the fourth first busbar relative to the plurality of first solar cell groups, and in at least one column of the solar cells, the second solar cell group is located closer to the fourth first busbar relative to the plurality of first solar cell groups.
9. The photovoltaic module according to any one of claims 1 to 8, characterized in that, Also includes: An insulating strip is disposed between the second busbar and the solar cell.
10. The photovoltaic module according to any one of claims 1 to 8, characterized in that, Also includes: The first glass cover is disposed on the side where the back surface of the solar cell is located; The second glass cover is disposed on the side of the solar cell where the light-receiving surface is located.