Method for manufacturing photovoltaic module, photovoltaic module manufacturing apparatus, and photovoltaic module

Abstract

The application discloses a preparation method of a photovoltaic module, a photovoltaic module preparation device and the photovoltaic module. The preparation method comprises the following steps: arranging 2n cell pieces along a first direction to form a cell array, wherein n is a natural number greater than or equal to 2; and laying a welding strip on the cell array to connect the cell array to form a cell string through a plurality of welding strips. The welding strip arranged between two adjacent cell pieces extends from the surface of one cell piece to the surface of another cell piece and is connected with the two cell pieces respectively. In the arrangement direction of the cell pieces, the first to nth cell pieces are connected in series through the welding strip, the (n+1)th to 2nth cell pieces are connected in series through the welding strip, and the nth cell piece and the (n+1)th cell piece are connected in parallel through the welding strip. The method can simplify the processing procedure, optimize the production rhythm, and solve the alignment misalignment problem existing in the connection between the cell string and the intermediate busbar.

Description

Technical Field

[0001] This application belongs to the field of photovoltaic technology, specifically relating to a method for preparing a photovoltaic module, a photovoltaic module preparation apparatus, and a photovoltaic module. Background Technology

[0002] Back-contact (BC) solar cells, with all electrodes located on the back and no electrodes obstructing the front, can improve photoelectric conversion performance. In related technologies, the process of fabricating photovoltaic modules using back-contact cells involves arranging multiple cells in a specific structure to form a cell string, then arranging these strings in an array along a first and second direction. Busbars are placed in the middle and on both sides of the module. The cell strings on both sides are connected in parallel via the middle busbar, and the cell strings on one side are connected in series via the edge busbars, thus forming the photovoltaic module. However, this module fabrication method requires connecting the middle busbar to the cell strings on both sides, making the fabrication process complex. Furthermore, the cell strings on both sides of the middle busbar need precise alignment; otherwise, the connection between the cell strings and the middle busbar will be affected, resulting in high operational requirements and low module production efficiency. Summary of the Invention

[0003] This application aims to provide a method for preparing photovoltaic modules, a photovoltaic module preparation apparatus, and a photovoltaic module, which can solve the problems in the existing module preparation process, which requires connecting the middle busbar to the battery strings on both sides, resulting in a complex preparation process, precise alignment of the battery strings on both sides of the middle busbar, high operational requirements, and low module production efficiency.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application propose a method for manufacturing a photovoltaic module, comprising: arranging 2n solar cells sequentially along a first direction to form a solar cell array, where n is a natural number greater than or equal to 2; Solder ribbons are laid on the battery array to connect the battery array to form a battery string through multiple solder ribbons; wherein, the solder ribbons located between two adjacent battery cells extend from the surface of one battery cell to the surface of another battery cell and are respectively connected to the two battery cells, and along the layout direction of the battery cells, the 1st to the nth battery cells are connected in series through the solder ribbons, the (n+1)th to the 2nth battery cells are connected in series through the solder ribbons, and the nth battery cell and the (n+1)th battery cell are connected in parallel through the solder ribbons.

[0005] Secondly, embodiments of this application provide a photovoltaic module fabrication apparatus for performing the fabrication method described in the first aspect, comprising: The stringing platform is equipped with a working surface for placing the battery cells; A battery cell transfer mechanism is disposed opposite to the stringing platform and is used to transfer the battery cells and arrange the battery cells on the working surface along a first direction; A ribbon laying mechanism is disposed opposite to the stringing platform and is used to cut and lay the ribbon on the battery array.

[0006] Thirdly, embodiments of this application propose a photovoltaic module, which is prepared by the preparation method described in the first aspect, or prepared by the photovoltaic module preparation apparatus described in the first aspect.

[0007] The photovoltaic module manufacturing method of this application has at least the following advantages compared to the prior art: 1. In existing module manufacturing processes, the battery strings on both sides of the intermediate busbar need to be fabricated separately and then connected to the intermediate busbar individually. This increases the process flow, and because the welded battery strings are flexible and easily moved, misalignment can occur when the two battery strings are joined, easily affecting the connection with the intermediate busbar and the appearance of the module. Especially for stacked products, it is difficult to control the consistency of the stacked cell positions when the two battery strings are joined, thus affecting the product appearance and module conversion efficiency. In this application, a one-time cell arrangement and solder strip connection method is used to form an integrated battery string, which includes two parallel connected half-strings of battery cells. In this way, when connecting the intermediate busbar, it is only necessary to place the intermediate busbar between the two half-strings of battery cells to achieve the connection between the intermediate busbar and the battery string, without having to consider the alignment and connection of the solder strips on both sides of the intermediate busbar separately. This not only facilitates the cell arrangement operation, but also ensures the consistency of the cell spacing in the entire battery string, and effectively solves the problem of misalignment of the battery strings on both sides of the intermediate busbar in the prior art.

[0008] 2. In this application, the cells are arranged into a cell array in one go, and then solder ribbons are laid on the cell array. This ensures the accuracy of the arrangement of multiple cells and the accuracy of the placement of solder ribbons on each cell, thereby improving the structural consistency of the different cell strings and thus improving the quality of the module products.

[0009] 3. The component preparation method of this application can prepare a complete battery string in one go, saving the battery string alignment and welding process of intermediate solder strips and intermediate busbars. This can simplify the processing process, optimize the production cycle, and shorten the battery string layout cycle, thereby improving production efficiency.

[0010] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below, wherein: Figure 1 This is a flowchart of a method for manufacturing a photovoltaic module according to an embodiment of this application; Figure 2 This is a flowchart of another method for manufacturing a photovoltaic module according to an embodiment of this application; Figure 3 This is a schematic diagram showing how a first and second battery cell are formed by cutting a first type of whole battery cell. Figure 4 This is a schematic diagram of a first arrangement of the first battery array according to an embodiment of this application; Figure 5 It is by Figure 4 A schematic diagram of the fabrication of the first battery string from the first battery array; Figure 6 This is a schematic diagram of a first arrangement of the second battery array according to an embodiment of this application; Figure 7 It is by Figure 6 A schematic diagram of the fabrication of the second battery string using the second battery array; Figure 8 This is a schematic diagram of the connection structure of two battery strings in a first type of photovoltaic module according to an embodiment of this application; Figure 9 This is a schematic diagram of a first type of photovoltaic module according to an embodiment of this application; Figure 10 This is a schematic diagram of a second arrangement of the first and second battery arrays according to embodiments of this application; Figure 11 This is a schematic diagram of a third arrangement of the first and second battery arrays according to embodiments of this application; Figure 12 It is by Figure 10 or Figure 11 A schematic diagram of the fabrication of the first battery string from the first battery array; Figure 13 It is by Figure 10 or Figure 11 A schematic diagram of the fabrication of the second battery string using the second battery array; Figure 14This is a schematic diagram of the connection structure of two battery strings in a second type of photovoltaic module according to an embodiment of this application; Figure 15 This is a schematic diagram showing how a first and second battery cell are formed by cutting a second type of whole battery cell. Figure 16 This is a schematic diagram of a fourth arrangement of the first and second battery arrays according to embodiments of this application; Figure 17 It is by Figure 16 A schematic diagram of the fabrication of the first battery string from the first battery array; Figure 18 It is by Figure 16 A schematic diagram of the fabrication of the second battery string using the second battery array; Figure 19 This is a schematic diagram of the connection structure of two battery strings in a third type of photovoltaic module according to an embodiment of this application; Figure 20 This is a schematic diagram of a fifth arrangement of the first and second battery arrays according to embodiments of this application; Figure 21 It is by Figure 20 A schematic diagram of the fabrication of the first battery string from the first battery array; Figure 22 It is by Figure 20 A schematic diagram of the fabrication of the second battery string using the second battery array; Figure 23 This is a schematic diagram of the connection structure of two battery strings in a fourth type of photovoltaic module according to an embodiment of this application; Figure 24 This is a schematic diagram of a sixth arrangement of the first and second battery arrays according to embodiments of this application; Figure 25 It is by Figure 24 A schematic diagram of the fabrication of the first battery string from the first battery array; Figure 26 It is by Figure 24 A schematic diagram of the fabrication of the second battery string using the second battery array; Figure 27 This is a schematic diagram of the connection structure of two battery strings in a fifth type of photovoltaic module according to an embodiment of this application; Figure 28 This is a schematic diagram of a seventh arrangement of the first and second battery arrays according to embodiments of this application; Figure 29 It is by Figure 28 A schematic diagram of the fabrication of the first battery string from the first battery array; Figure 30 It is by Figure 28 A schematic diagram of the fabrication of the second battery string using the second battery array; Figure 31 This is a schematic diagram of the connection structure of two battery strings in a sixth type of photovoltaic module according to an embodiment of this application; Figure 32 This is a schematic diagram of a half-cell battery cell according to an embodiment of this application; Figure 33 This is a schematic diagram of an eighth arrangement of the first and second battery arrays according to embodiments of this application; Figure 34 It is by Figure 33 A schematic diagram of the fabrication of the first battery string from the first battery array; Figure 35 It is by Figure 33 A schematic diagram of the fabrication of the second battery string using the second battery array; Figure 36 This is a schematic diagram of the connection structure of two battery strings in a seventh type of photovoltaic module according to an embodiment of this application; Figure 37 This is a schematic diagram of a ninth arrangement of the first and second battery arrays according to embodiments of this application; Figure 38 It is by Figure 37 A schematic diagram of the fabrication of the first battery string from the first battery array; Figure 39 It is by Figure 37 A schematic diagram of the fabrication of the second battery string using the second battery array; Figure 40 This is a schematic diagram of the connection structure of two battery strings in an eighth type of photovoltaic module according to an embodiment of this application.

[0012] Figure label: 10: Battery string; 11: First battery string; 12: Second battery string; 101: Battery array; 101a: First battery array; 101b: Second battery array; 20: Battery cell; A1: Right-angled edge; A2: Chamfered edge; 21: First battery cell; 21': First inverted battery cell; 22: Second battery cell; 22': Second inverted battery cell; 20a: Full battery cell; 20b: Half battery cell; 200: Electrode component; 201: First electrode component; 202: Second electrode component; 30: Welding ribbon laying structure; 31: Welding ribbon; 40: Busbar; 41: Edge busbar; 42: Middle busbar; X: First direction; Y: Second direction. Detailed Implementation

[0013] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0014] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0015] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0016] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0017] The following description, in conjunction with the accompanying drawings, details the photovoltaic module preparation method, photovoltaic module preparation apparatus, and photovoltaic module provided in this application through specific embodiments and application scenarios.

[0018] like Figure 1 As shown, Figure 1 A flowchart of a method for manufacturing a photovoltaic module is shown, the method specifically including the following steps: 101. Arrange 2n battery cells 20 sequentially along the first direction X to form a battery array 101, where n is a natural number greater than or equal to 2; 102. Solder ribbons 31 are laid on the battery array 101 to connect the battery array 101 to form a battery string 10 through multiple solder ribbons 31; wherein, the solder ribbons 31 located between two adjacent battery cells 20 extend from the surface of one battery cell 20 to the surface of another battery cell 20 and are respectively connected to the two battery cells 20, and along the arrangement direction of the battery cells 20, the first to the nth battery cells 20 are connected in series through the solder ribbons 31, the (n+1)th to the 2nth battery cells 20 are connected in series through the solder ribbons 31, and the nth battery cell 20 and the (n+1)th battery cell 20 are connected in parallel through the solder ribbons 31.

[0019] Specifically, this application utilizes a photovoltaic module fabrication apparatus for photovoltaic module fabrication. This apparatus includes a stringing platform, a cell transfer mechanism, and a ribbon laying mechanism. The stringing platform has a working surface for placing the cells 20, providing 2n cells 20. The cell transfer mechanism can transfer the 2n cells 20 onto the working surface respectively. Figure 4 As shown, 2n battery cells 20 can be arranged sequentially along the first direction X to form a battery array 101. Wherein, as... Figure 5 , Figure 7 and Figure 9 As shown, the battery array 101 includes a first battery array 101a and a second battery array 101b. The first battery array 101a can be connected by solder ribbons to form a first battery string 11, and the second battery array 101b can be connected by solder ribbons to form a second battery string 12. The first battery string 11 and the second battery string 12 can be electrically connected to form a photovoltaic module.

[0020] The solar cells 20 used in this step can be directly sourced from existing solar cells, or they can be obtained by further processing existing solar cells, such as cutting and slicing them. Furthermore, when arranging multiple solar cells 20, adjacent solar cells 20 can be spaced apart or partially overlapped. The specific structure and arrangement of the solar cells 20 can be flexibly configured according to the structural design of the photovoltaic module, and are not limited thereto.

[0021] Furthermore, on the working surface of the stringing platform, after 2n battery cells 20 are arranged to form a battery array 101, the incoming solder ribbon 31 is cut by a solder ribbon laying mechanism, and the cut solder ribbon 31 is laid on the battery array 101, wherein, for example... Figure 3As shown, each solar cell 20 is provided with two electrode components 200 of opposite conductivity types, namely a first electrode component 201 and a second electrode component 202. One of the first electrode component 201 and the second electrode component 202 is used to collect holes, and the other is used to collect electrons. By electrically connecting the solder ribbon 31 to the electrode component 200, the charge carriers generated in the solar cell 20 are discharged to form a current. By laying the solder ribbon 31 on the solar cell array 101, adjacent solar cells 20 are connected in series or in parallel through the solder ribbon 31. In this way, 2n solar cells 20 are electrically connected to form a complete solar cell string 10.

[0022] In the battery string 10 prepared in step 102, along the arrangement direction of the battery cells 20 (e.g. Figure 4 Along the top-to-bottom direction), the first to nth solar cells 20 are connected in series via solder ribbon 31, and the (n+1)th to 2nth solar cells 20 are connected in series via solder ribbon 31, while the nth and (n+1)th solar cells 20 are connected in parallel via solder ribbon 31. For example, as... Figure 4 and Figure 5 As shown, n is 4. Along the top-to-bottom direction, the 1st to 4th battery cells 20 are connected in series by solder ribbons 31, the 5th to 8th battery cells 20 are connected in series by solder ribbons 31, and the 4th battery cell 20 and the 5th battery cell 20 are connected in parallel by solder ribbons 31.

[0023] Furthermore, a battery string 10 includes 2n battery cells 20, wherein the first n battery cells 20 are connected in series via solder ribbons 31 to form a half-string battery string, and the last n battery cells 20 are connected in series via solder ribbons 31 to form another half-string battery string. These two half-string battery strings are connected in parallel via solder ribbons 31. In this application, by first arranging the 2n battery cells 20 into a battery array 101 at once, and then laying solder ribbons 31 on the battery array 101, since the positions of two adjacent battery cells 20 in the battery array 101 are relatively fixed or substantially fixed, the length of the solder ribbons 31 connecting the two adjacent battery cells 20 is also fixed or substantially fixed. In this way, by pre-cutting the solder ribbons 31 and then sequentially transferring the solder ribbons 31 to the battery cells 20, the accuracy of the placement of the solder ribbons 31 on each battery cell 20 is ensured, thereby improving the structural consistency of the different battery strings 10 obtained. Furthermore, whether between two cells connected in series or between two cells connected in parallel, the solder ribbon 31 connecting the two adjacent cells 20 is a continuous structure, which facilitates the cutting and laying of the solder ribbon 31.

[0024] The battery cell 20 in this application can be a back-contact battery cell 20. The back side of the battery cell 20 is provided with two electrode components 200 of opposite conductivity types, namely, a first electrode component 201 and a second electrode component 202. The two electrode components 200 of opposite conductivity types are arranged alternately along the second direction Y. The electrode component 200 can be a connection point or pad provided on the main grid (or bus electrode) or fine grid (current collector electrode) on the back side of the battery cell 20. By electrically connecting the solder ribbon 31 to the electrode component 200 on the battery cell 20, the current generated by the photoelectric conversion of the battery cell 20 can be collected in the solder ribbon 31 so that the current can be discharged by the solder ribbon 31.

[0025] Furthermore, in the aforementioned half-string battery, adjacent battery cells 20 are connected in series via solder ribbon 31. One end of the solder ribbon 31 is electrically connected to the first electrode component 201 on the preceding battery cell 20, and the other end extends to the following battery cell 20 and is electrically connected to the second electrode component 202. Alternatively, one end of the solder ribbon 31 is electrically connected to the second electrode component 202 on the preceding battery cell 20, and the other end extends to the following battery cell 20 and is electrically connected to the first electrode component 201, thereby achieving the series connection of two adjacent battery cells 20. For the two adjacent cells 20 in the two half-strings of batteries, namely the nth cell 20 and the (n+1)th cell 20, they are connected in parallel by a solder ribbon 31. One end of the solder ribbon 31 is electrically connected to the first electrode component 201 on the nth cell 20, and the other end extends continuously to the (n+1)th cell 20 and is electrically connected to the first electrode component 201 on the (n+1)th cell 20; or, one end of the solder ribbon 31 is electrically connected to the second electrode component 202 on the nth cell 20, and the other end extends continuously to the (n+1)th cell 20 and is electrically connected to the second electrode component 202 on the (n+1)th cell 20, thereby realizing the parallel connection of the two half-strings of batteries.

[0026] Understandably, in existing module manufacturing processes, n solar cells 20 are typically arranged along a first direction X and connected in series with solder ribbons 31 to form an initial cell string. Then, two initial cell strings are arranged at intervals along the first direction X, and a busbar 40 is placed between the two initial cell strings. The solder ribbons 31 on the end cells 20 of the two initial cell strings are electrically connected to the busbar 40, thereby connecting the two initial cell strings in parallel through the busbar 40. In existing module manufacturing processes, two series-connected initial cell strings need to be fabricated separately using solar cells 20 and solder ribbons 31, and then each initial cell string is connected to an intermediate busbar 42 to achieve parallel connection. Since the two initial cell strings are fabricated separately, the solder ribbons 31 connecting them to the intermediate busbar 42 are independent of each other. Therefore, during connection, both the precise alignment of the two initial cell strings and their respective connection performance with the intermediate busbar 42 must be considered. This not only increases the process flow, but also makes it easy for misalignment to occur when two initial battery strings are connected because the wired battery strings (i.e., the initial battery strings) are flexible and movable. This affects the connection between the battery strings and the intermediate busbar 42, as well as the appearance of the module. Especially for stacked products, it is difficult to control the consistency of the stacked positions when two battery strings are connected, thus affecting the product appearance and module conversion efficiency.

[0027] In this application, 2n battery cells 20 are arranged sequentially along the first direction X to form a battery array 101. Then, solder ribbons 31 are laid on the battery array 101 to electrically connect adjacent battery cells 20 to form an integrated battery string 10. In this battery string 10, the first n battery cells 20 are connected in series to form a half-string battery string, and the last n battery cells 20 are connected in series to form a half-string battery string. The two half-string battery strings are connected in parallel through continuous solder ribbons 31. In this way, each half-string of battery in this application is equivalent to an initial battery string in the prior art. When connecting the intermediate busbar 42, it is only necessary to place the intermediate busbar 42 between two half-strings of battery in the battery string 10 to achieve the connection between the intermediate busbar 42 and the battery string 10, without having to consider the alignment and connection of the solder strips 31 on both sides of the intermediate busbar 42 separately. This not only facilitates the string arrangement operation, but also ensures the consistency of the spacing of the battery cells 20 in the entire battery string 10, and effectively solves the problem of misalignment of the battery strings 10 on both sides of the intermediate busbar 42 in the prior art. Using the component preparation method of this application, the entire battery string 10 can be prepared in one go, saving the alignment of the battery string 10 and the welding process between the intermediate solder strip 31 and the intermediate busbar 42. This simplifies the processing steps, optimizes the production cycle, and shortens the layout cycle of the battery string 10, thereby improving production efficiency.

[0028] Furthermore, such as Figure 2 , Figure 8 and Figure 9 As shown, the preparation method of this application further includes: Step 103: Arrange the multiple battery strings 10 along the second direction Y, where the second direction Y intersects the first direction X.

[0029] Step 104: Connect multiple battery strings 10 through the busbar 40 to form a photovoltaic module.

[0030] Specifically, multiple battery strings 10 (including the first battery string 11 and the second battery string 12 described below) can be prepared by repeating steps 101 and 102. Furthermore, as... Figure 8 and Figure 9 As shown, multiple battery strings 10 are arranged along the second direction Y to form a battery string array. Busbars 40 are respectively set on both sides and in the middle of the battery string array along the first direction X. The busbars 40 extend along the second direction Y. The busbars 40 set on both sides of the battery string array are designated as edge busbars 41, and the busbars 40 set in the middle of the battery string array are designated as middle busbars 42.

[0031] The edge busbar 41 can be disposed outside the battery string 10, meaning that the edge busbar 41 does not overlap with the battery cells 20 in the battery string 10; or, the edge busbar 41 can also be disposed on the battery cells 20 at the end of the battery string 10, meaning that the edge busbar 41 at least partially overlaps with the battery cells 20 at the end of the battery string 10. For example, as Figure 8 and Figure 9 As shown, edge busbars 41 are provided on the first battery cell 20 and the 2nth battery cell 20 in the battery string 10, and two adjacent battery strings 10 along the second direction Y can be connected in series through the edge busbars 41.

[0032] Accordingly, the intermediate busbar 42 can be disposed between two half-strings of battery in the battery string 10. The intermediate busbar 42 can be overlapped with the battery cell 20 or staggered. For example, the intermediate busbar 42 can be disposed on the nth battery cell 20 or on the (n+1)th battery cell 20; the intermediate busbar 42 can also be disposed in the gap between the nth battery cell 20 and the (n+1)th battery cell 20.

[0033] The preparation method of this application involves first preparing a complete battery string 10, each of which includes two half-strings of batteries already connected in parallel. This simplifies the setup of the edge busbar 41 and the intermediate busbar 42, allowing for flexible selection of whether or not to hide the busbar 40 based on the component design requirements. Furthermore, since the nth and (n+1)th battery cells 20 are already connected in parallel via solder strips 31 during the preparation of the battery string 10, setting the intermediate busbar 42 only requires placing it in the appropriate position, without needing to separately consider the alignment and connection of the solder strips 31 on both sides of the intermediate busbar 42. This not only facilitates practical operation but also effectively solves the problem of misalignment of the battery strings 10 on both sides of the intermediate busbar 42 in the prior art.

[0034] In some embodiments, the busbar 40 can be disposed on the back side of the battery string 10. The busbar 40 here includes a central busbar 42 and an edge busbar 41. Specifically, the edge busbar 41 can be disposed on the back side of the first battery cell 20 and the 2nth battery cell 20, and the central busbar 42 can be disposed on the back side of the nth battery cell 20 or the (n+1)th battery cell 20. This allows for the concealed placement of the central busbar 42 and the edge busbar 41, which not only improves the area utilization within the module but also enhances the aesthetic appearance of the module product.

[0035] Optionally, such as Figure 8 and Figure 9 As shown, the battery string 10 includes a first battery string 11 and a second battery string 12. Step 103 includes: arranging at least one first battery string 11 and at least one second battery string 12 alternately along the second direction Y, wherein the first battery string 11 and the second battery string 12 are rotationally symmetrical.

[0036] In this embodiment, a photovoltaic module is formed by using two types of battery strings 10 with rotational symmetry. Specifically, rotating the first battery string 11 by 180° yields the second battery string 12, and rotating the second battery string 12 by 180° yields the first battery string 11. This facilitates the arrangement and series / parallel connection of multiple battery strings 10. Furthermore, during the fabrication of the battery strings 10, one structure can be fabricated, and the other structure can be obtained by rotation, thereby improving processing efficiency.

[0037] In some embodiments, such as Figure 8As shown, the surface of the battery cell 20 is provided with two electrode components 200 of opposite conductivity types. The two electrode components 200 of opposite conductivity types are arranged alternately along the second direction Y. The solder strip 31 is electrically connected to the electrode components 200. Along the second direction Y, the electrode components 200 on two adjacent battery cells 20 at positions close to each other on one side have the same conductivity type.

[0038] Specifically, two adjacent battery strings 10 along the second direction Y are designated as a first battery string 11 and a second battery string 12, respectively. The 2n battery cells 20 in the first battery string 11 correspond one-to-one with the 2n battery cells 20 in the second battery string 12 along the second direction Y. Each battery cell 20 is provided with two electrode components 200 of opposite conductivity types: a first electrode component 201 and a second electrode component 202. The first electrode components 201 and the second electrode components 202 are arranged alternately along the second direction Y on the battery cell 20. The outermost electrode components 200 on both sides of each battery cell 20 are designated as edge electrode components. Furthermore, the conductivity types of the edge electrode components that are close to each other on two adjacent battery cells 20 along the second direction Y are opposite. That is, if the edge electrode component on one battery cell 20 is the first electrode component 201, then the corresponding edge electrode component on the other battery cell 20 is the second electrode component 202, and vice versa.

[0039] In this application, as Figure 5 and Figure 7 As shown, by setting the electrode components 200 on two adjacent battery cells 20 along the second direction Y to have the same conductivity type at their respective edges close to each other, it can be ensured that the solder ribbon laying structure 30 on the two types of battery strings 10 is consistent. Thus, when preparing different battery strings 10, the same solder ribbon 31 cutting, laying and pre-fixing process can be used, thereby ensuring the consistency of the production cycle and improving production efficiency.

[0040] In some embodiments, in the plurality of cell strings 10 forming a photovoltaic module, the solder ribbon layup structure 30 of the solder ribbon 31 in each cell string 10 is identical. For example... Figure 5 and Figure 7 As shown, the ribbon laying structure 30 in the first battery string 11 is the same as the ribbon laying structure 30 in the second battery string 12. It should be understood that the ribbon laying structure 30 here includes the number of ribbons 31, the structural dimensions of the ribbons 31 on each battery cell 20, and the placement position of the ribbons 31 on the corresponding battery cell 20; wherein, the structural dimensions of the ribbons 31 include the length, width, and thickness of the ribbons 31.

[0041] Specifically, in step 101, 2n solar cells 20 are arranged to form a solar cell array 101. Then, solder ribbons 31 are laid on the solar cell array 101 to connect the multiple solar cells 20 into a solar cell string 10. Each solar cell 20 has two electrode components 200 with opposite conductivity types. When laying the solder ribbons 31, each solder ribbon 31 corresponds to one electrode component 200 on the solar cell 20. In actual production, the incoming solder ribbons are in rolls. Before laying the solder ribbons, a solder ribbon laying mechanism is used to cut the original solder ribbons into multiple solder ribbons 31 of target lengths. The cut solder ribbons 31 are then transferred and laid onto the solar cells 20, so that each electrode component 200 on the solar cell 20 is connected to a solder ribbon 31. The specific length of each solder ribbon 31 is determined by its connection position on the solar cell 20.

[0042] In this application, by making the solder ribbon laying structure 30 in each battery string 10 the same, the same solder ribbon 31 cutting, laying and pre-fixing process can be used when preparing different battery strings 10, thereby ensuring the consistency of production cycle and improving production efficiency.

[0043] In some embodiments, a pre-fixing structure is provided on the battery cell 20 and / or the solder ribbon to pre-fix the solder ribbon 31 to the battery cell 20. The pre-fixing structure is the same in each battery string 10. The pre-fixing structure includes adhesive dots or a coating.

[0044] In this embodiment, a pre-fixing structure is provided on the battery cell 20 and / or the solder ribbon to pre-fix the solder ribbon 31. This prevents the solder ribbon 31 from undergoing significant displacement on the battery cell 20 during subsequent transfer, thus avoiding any impact on the connection performance between the solder ribbon 31 and the electrode component 200. Furthermore, different battery strings 10 employ the same pre-fixing structure, allowing for the use of the same pre-fixing process when manufacturing different battery strings 10. This ensures consistency in production cycle time and improves production efficiency.

[0045] One method of pre-fixation is to apply adhesive to the solar cell 20, using the adhesive dots to pre-fix the solder ribbon 31 and the solar cell 20. The adhesive application can be done before or after laying the solder ribbon 31; there is no limitation in this method. Alternatively, a film-coating method can be used to pre-fix the solder ribbon 31. Specifically, after laying the solder ribbon 31 onto the solar cell 20, a film is applied to part or all of the surface of the solar cell 20 to pre-fix the solder ribbon 31. Alternatively, a fixing film can be applied to the solder ribbon 31 before laying it onto the solar cell 20, and then the solder ribbon 31 and the fixing film are simultaneously transferred to the surface of the solar cell 20. Of course, other pre-fixation methods can also be used, as long as they can achieve the goal of pre-fixing the solder ribbon 31 to the solar cell 20; there is no limitation in this method.

[0046] It is understood that in the preparation method of this application, the welding and fixing of the solder ribbon 31 to the electrode component 200 can be achieved in the module lamination process. That is, the solder ribbon 31 and the electrode component 200 are not welded and fixed in the battery string 10 prepared in step 102, but the solder ribbon 31 is pre-fixed by the pre-fixing structure provided on the battery cell 20.

[0047] In step 104, busbars 40 are installed at both ends and the middle of the battery string 10, forming an electrical connection between the busbars 40 and the corresponding solder ribbons 31, so that multiple battery strings 10 are electrically connected to form a battery cell through the busbars 40. Then, a front encapsulating film and a front glass are sequentially laid on the front side of the battery cell, and a back encapsulating film and a backsheet are sequentially laid on the back side of the battery cell to form a laminate. The laminate is then fed into a laminator for lamination to prepare a photovoltaic module. During the lamination process, the flux material on the surface of the solder ribbons 31 softens and diffuses due to heat, forming an intermetallic compound layer between the solder ribbons 31 and the electrode components 200, thereby achieving welding and fixing of the solder ribbons 31 and the electrode components 200. Simultaneously, the pre-fixed structure on the battery cell 20, combined with the encapsulating film material, can improve the connection strength between the encapsulating film and the battery cell 20, thereby enhancing the encapsulation and protection of the battery cell 20. Compared to the prior art, where the solder ribbon 31 and electrode component 200 need to be welded and fixed separately when preparing each battery string 10, the method of pre-fixing the solder ribbon 31 first and then simultaneously welding and fixing the solder ribbon 31 during lamination can simplify the operation process and improve processing efficiency.

[0048] It should be noted that the adhesive or film used for dispensing or laminating can be made of the same material as the encapsulation film, such as EVA or POE; other materials can also be used, such as UV curing adhesive, thermosetting epoxy, acrylic adhesive, etc. The choice can be made flexibly according to the needs and is not limited here.

[0049] In some embodiments, the battery cell 20 includes a first battery cell 21 and a second battery cell 22, wherein the first battery cell 21 and the second battery cell 22 are cut from a whole battery cell 20a, and the electrode pattern on the first battery cell 21 is rotationally symmetrical with the electrode pattern on the second battery cell 22; then step 101 includes: S1. The battery array 101 is formed by alternately arranging n first battery cells 21 and n second battery cells 22 along the first direction X; wherein, along the distribution direction of the battery cells 20, the first battery cells 21 and the second battery cells 22 that are sequentially adjacent come from the same whole battery cell 20a.

[0050] It should be understood that the alternating arrangement in the embodiments of this application refers to the alternating arrangement of the first battery cell 21 and the second battery cell 22 along the first direction X. It is not limited to the first battery cell 21 and the second battery cell 22 being arranged in a one-to-one manner. In the battery array 101 formed by the arrangement, one or two second battery cells 22 may be provided between two adjacent first battery cells 21, or one or two first battery cells 21 may be provided between two adjacent second battery cells 22. Furthermore, the first battery cell 20 can be either a first battery cell 21 or a second battery cell 22.

[0051] Specifically, such as Figure 3 As shown, in this embodiment of the application, the incoming battery cell is a whole battery cell 20a. Before assembling the cells, the whole battery cell 20a is cut into a first battery cell 21 (denoted as A) and a second battery cell 22 (denoted as B). The electrode pattern on the first battery cell 21, which is cut from the same whole battery cell 20a, is rotationally symmetrical with the electrode pattern on the second battery cell 22. That is, after rotating the first battery cell 21 by 180°, its electrode pattern is the same as that of the second battery cell 22. Alternatively, after rotating the second battery cell 22 by 180°, its electrode pattern is the same as that of the first battery cell 21. The electrode pattern refers to the arrangement structure of two electrode components 200 with opposite conductivity types on the battery cell 20.

[0052] Furthermore, a battery array 101 is formed by alternating arrangement of n first battery cells 21 and n second battery cells 22 along the first direction X, and in the battery array 101, along the distribution direction of the battery cells 20, as shown... Figure 4 As shown, along the top-to-bottom direction, a first battery cell 21 and its adjacent second battery cell 22 come from the same whole battery cell 20a. This arrangement allows the cutting operation of the battery cell 20 and the stacking operation of the battery cell 20 to be carried out simultaneously, thereby optimizing the production cycle and improving the stacking efficiency of the battery string 10.

[0053] In some embodiments, such as Figure 6As shown, n is set to an even number. Along the arrangement direction of the battery cells 20, the first battery cell 20 and the nth battery cell 20 in each battery string 10 come from the same whole battery cell 20a. In this way, it can be ensured that the 2n battery cells 20 in the battery string 10 are exactly cut from n whole battery cells 20a, avoiding the occurrence of redundant battery cells 20.

[0054] In other embodiments, such as Figure 4 As shown, n is set to an even number, and the (n+1)th battery cell 20 and the 2nth battery cell 20 come from the same whole battery cell 20a. In this way, it can be ensured that the 2n battery cells 20 in the battery string 10 are exactly obtained by cutting n whole battery cells 20a, avoiding the occurrence of redundant battery cells 20.

[0055] In one embodiment, such as Figure 4 As shown, step S1 above may include: S11. Provide n / 2 whole battery cells 20a, cut them to form n / 2 first battery cells 21 and n / 2 second battery cells 22, and arrange the cut first battery cells 21 and second battery cells 22 alternately along the first direction X to form a first battery array 101a.

[0056] S12. Provide one whole battery cell 20a, cut it to form the first battery cell 21 and the second battery cell 22, arrange the second battery cell 22 at the tail end of the first battery array 101a, and pre-store the remaining first battery cell 21. S13. Provide n / 2-1 whole battery cells 20a, cut them to form n / 2-1 first battery cells 21 and n / 2-1 second battery cells 22, and arrange the cut first battery cells 21 and second battery cells 22 alternately after the second battery cells 22 in step S12 along the fabrication direction of the battery cells 20. S14. Arrange the first battery cells 21 pre-stored in step S12 at the tail end of the first battery array 101a obtained in step S13 to form the battery array 101.

[0057] It should be understood that the phrase "the first battery cell 21 and the second battery cell 22 are arranged alternately in sequence" in this application means that the first battery cell 21 and the second battery cell 22 are arranged alternately in a one-to-one manner, that is, there is a second battery cell 22 between two adjacent first battery cells 21, and there is a first battery cell 21 between two adjacent second battery cells 22.

[0058] In the embodiments of this application, such as Figure 4As shown, n / 2 whole battery cells 20a are first cut into n / 2 first battery cells 21 and n / 2 second battery cells 22. First battery cells 21 are placed at the beginning of the battery array 101 along the first direction X, followed by second battery cells 22. This process of placing first battery cells 21-second battery cells 22-first battery cells 21-second battery cells 22-... is repeated until the n / 2 first battery cells 21 and n / 2 second battery cells 22 are alternately arranged to form the first battery array 101a. Then, a whole battery cell 20a is cut into first battery cells 21 and second battery cells 22. The second battery cells 22 are arranged at the end of the first battery array 101a, becoming the (n+1)th battery cell 20 in the entire battery string 10, and the remaining first battery cells 21 are pre-stored. Next, n / 2-1 whole battery cells 20a are cut into n / 2-1 first battery cells 21 and n / 2-1 second battery cells 22. The cut first battery cells 21 and second battery cells 22 are then alternately arranged along the first direction X in the pattern "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-..." after the aforementioned (n+1)th battery cell 20. The pre-stored first battery cell 21 is then arranged as the 2nth battery cell 20 at the tail end of the battery array 101, thus obtaining a battery array 101 containing 2n battery cells 20.

[0059] In this way, the first battery array 101 (i.e., the first battery array 101a) can be fabricated, so as to further fabricate the first battery string 11. The fabrication method of the battery array 101 according to the embodiments of this application allows the cutting cycle of the battery cells 20 to match the stacking cycle of the battery cells 20, facilitating assembly line production and improving production efficiency. Furthermore, the fabrication method of the battery array 101 according to this application can fully utilize the cut battery cells 20, avoiding the occurrence of excess battery cells 20.

[0060] Furthermore, such as Figure 5 As shown, the first battery string 11 can be prepared by laying solder ribbons 31 on the battery array 101 according to step 102. The specific laying method of solder ribbons 31 can be found in the above embodiments, and will not be repeated here.

[0061] Furthermore, such as Figure 8 and Figure 9 As shown, the battery string 10 prepared by the battery array 101 in step S14 is designated as the first battery string 11, and the preparation method further includes: S15. A plurality of first battery strings 11 are prepared, and a portion of the first battery strings 11 are rotated by 180° to obtain a second battery string 12. S16. The first battery string 11 and the second battery string 12 are arranged alternately along the second direction Y, and the second direction Y intersects the first direction X. S17. The first battery string 11 and the second battery string 12 are connected by the busbar 40 to form a photovoltaic module.

[0062] In this embodiment, multiple first battery strings 11 can be prepared by repeating steps S11 to S14. Then, a portion of the first battery strings 11 are rotated 180° to obtain second battery strings 12. The first battery strings 11 and second battery strings 12 are then alternately arranged along the second direction Y to form a battery string array. The multiple first battery strings 11 and multiple second battery strings 12 are then connected in series and parallel via busbars 40 (including a middle busbar 42 and an edge busbar 41) to form a photovoltaic module. Thus, when preparing the battery string 10 from the solar cell 20, only the first battery strings 11 need to be prepared, simplifying the processing technology of the battery string 10 and facilitating actual processing operations.

[0063] In another embodiment, such as Figure 6 As shown, step S1 above may further include: S21. Provide one whole battery cell 20a, cut it to form the first battery cell 21 and the second battery cell 22, and use the second battery cell 22 as the first battery cell 20 of the battery array 101, and pre-store the remaining first battery cells 21. S22. Provide n / 2-1 whole battery cells 20a, cut them into n / 2-1 first battery cells 21 and n / 2-1 second battery cells 22, and arrange the cut first battery cells 21 and second battery cells 22 alternately behind the first battery cell 20 along the first direction X to form a second battery array 101b, and arrange the first battery cells 21 pre-stored in step S21 at the tail end of the second battery array 101b; S23. Provide n / 2 whole battery cells 20a, cut them to form n / 2 first battery cells 21 and n / 2 second battery cells 22, and arrange the cut first battery cells 21 and second battery cells 22 alternately after the pre-stored first battery cells 21 along the distribution direction of the battery cells 20 to form the battery array 101.

[0064] In the embodiments of this application, such as Figure 6As shown, a single whole battery cell 20a is first cut to obtain a first battery cell 21 and a second battery cell 22. The second battery cell 22 is placed at the beginning of the battery array 101 as the first battery cell 20, and the remaining first battery cells 21 are pre-stored. Then, n / 2-1 whole battery cells 20a are cut to obtain n / 2-1 first battery cells 21 and n / 2-1 second battery cells 22. Along the first direction X, the cut first battery cells 21 and second battery cells 22 are arranged alternately after the aforementioned first battery cell 20 in the pattern of "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-..." to form a second battery array 101b. The previously pre-stored first battery cells 21 are placed at the end of the second battery array 101b as the nth battery cell 20. Next, n / 2 whole solar cells 20a are cut into n / 2 first solar cells 21 and n / 2 second solar cells 22, along the fabrication direction of the solar cells 20 (i.e., Figure 6 (From top to bottom) Again, following the arrangement of "first battery piece 21-second battery piece 22-first battery piece 21-second battery piece 22-...", the cut first battery piece 21 and second battery piece 22 are alternately arranged after the aforementioned nth battery piece 20, thereby arranging a battery array 101 containing 2n battery pieces 20.

[0065] This enables the fabrication of a battery array 101 with an alternative structure (i.e., the second battery array 101b), which can then be further fabricated to obtain the second battery string 12. The battery array 101 fabrication method of this application allows the cutting cycle of the battery cells 20 to match the stacking cycle of the battery cells 20, facilitating assembly line production and improving production efficiency. Furthermore, the battery array 101 fabrication method of this application ensures full utilization of the cut battery cells 20, avoiding the generation of excess battery cells 20.

[0066] Furthermore, such as Figure 7 As shown, the second battery string 12 can be prepared by laying solder ribbons 31 on the battery array 101 according to step 102. The specific laying method of solder ribbons 31 can be found in the above embodiments, and will not be repeated here.

[0067] Furthermore, such as Figure 8 and Figure 9 As shown, the battery string 10 prepared by the battery array 101 in step S23 is designated as the second battery string 12, and the preparation method further includes: S24. A plurality of second battery strings 12 are prepared, and a portion of the second battery strings 12 are rotated by 180° to obtain a first battery string 11; S25. The first battery string 11 and the second battery string 12 are arranged alternately along the second direction Y, where the second direction Y intersects with the first direction X. S26. The first battery string 11 and the second battery string 12 are connected by the busbar 40 to form a photovoltaic module.

[0068] In this embodiment, multiple second battery strings 12 can be prepared by repeating steps S21 to S23. A portion of these second battery strings 12 are then rotated 180° to obtain a first battery string 11. The first battery strings 11 and second battery strings 12 are then alternately arranged along the second direction Y to form a battery string array. The first battery strings 11 and second battery strings 12 are then connected in series and parallel via busbars 40 (including a middle busbar 42 and an edge busbar 41) to form a photovoltaic module. Thus, when preparing the battery string 10 from the solar cell 20, only the second battery strings 12 need to be prepared, simplifying the processing technology of the battery string 10 and facilitating actual processing operations.

[0069] In some embodiments, multiple first battery strings 11 can be prepared by repeating the aforementioned steps S11 to S14, and multiple second battery strings 12 can be prepared by repeating the aforementioned steps S21 to S23. Then, the first battery strings 11 and the second battery strings 12 are arranged alternately along the second direction Y to form a battery string array. The first battery strings 11 and the second battery strings 12 are then connected in series and parallel by busbars 40 (including intermediate busbars 42 and edge busbars 41) to form a photovoltaic module. In this way, the first battery strings 11 and the second battery strings 12 are prepared separately so that the preparation operations of the first battery strings 11 and the second battery strings 12 can be performed simultaneously, thereby shortening the processing time and improving the processing efficiency.

[0070] In one embodiment, such as Figure 10 As shown, n is set to an odd number, and step S1 above may include: S31. Provide one whole battery cell 20a, cut it to form the first battery cell 21 and the second battery cell 22, and use the second battery cell 22 as the first battery cell 20 of the battery array 101, and pre-store the remaining first battery cells 21. S32. Provide (n-1) / 2 whole battery cells 20a, cut them to form (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22, and arrange the cut first battery cells 21 and second battery cells 22 alternately behind the first battery cell 20 along the first direction X to form a first battery array 101a; S33. Provide one whole battery cell 20a, cut it to form the first battery cell 21 and the second battery cell 22, arrange the second battery cell 22 at the tail end of the first battery array 101a, and pre-store the remaining first battery cell 21. S34. Provide (n-1) / 2 whole battery cells 20a, cut them to form (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22, and arrange the cut first battery cells 21 and second battery cells 22 alternately behind the second battery cells 22 in step S33 along the fabrication direction of the battery cells 20 to form the battery array 101.

[0071] In the embodiments of this application, such as Figure 10 As shown, a single whole battery cell 20a is first cut into a first battery cell 21 and a second battery cell 22. The second battery cell 22 is placed at the beginning of the battery array 101 as the first battery cell 20, while the remaining first battery cells 21 are pre-stored. Then, (n-1) / 2 whole battery cells 20a are cut into (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22. These are then arranged along the first direction X in the pattern of "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-...", after the first battery cell 20, to form the first battery array 101a. Next, a single whole battery cell 20a is cut into a first battery cell 21 and a second battery cell 22. The second battery cell 22 is placed at the end of the previously obtained first battery array 101a as the (n+1)th battery cell 20, while the remaining first battery cells 21 are pre-stored. Then, (n-1) / 2 whole battery cells 20a are cut to obtain (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22. Again, along the first direction X, the cut first battery cells 21 and second battery cells 22 are alternately arranged after the aforementioned (n+1)th battery cell 20 in the pattern of "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-...", thereby arranging a battery array 101 containing 2n battery cells 20. Thus, the first battery array 101a can be prepared through steps S31 to S34, so as to further prepare the first battery string 11. Furthermore, the battery array 101 preparation method of this embodiment allows the cutting cycle of the battery cells 20 to match the arrangement cycle of the battery cells 20, facilitating assembly line production and improving production efficiency.

[0072] It is understandable that in both steps S31 and S33, there is one remaining first battery cell 21. During the cell arrangement process, these two first battery cells 21 can be pre-stored for use in the preparation of other battery strings 10. For example, they can be used in steps S42 and S44 described later, ensuring that all the cut battery cells 20 can be utilized.

[0073] Furthermore, such as Figure 10 As shown, after step S34, the preparation method further includes: S41. Provide (n-1) / 2 whole battery cells 20a, cut them to form (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22, and arrange the cut first battery cells 21 and second battery cells 22 alternately along the first direction X to form a second battery array 101b; S42. Arrange one of the first battery cells 21 pre-stored in step S31 or step S33 at the tail end of the second battery array 101b. S43. Provide (n-1) / 2 whole battery cells 20a, cut them to form (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22, and arrange the cut first battery cells 21 and second battery cells 22 alternately behind the second battery array 101b along the fabrication direction of the battery cells 20. S44. Arrange the other first battery cell 21 pre-stored in step S31 or step S33 at the tail end of the second battery array 101b obtained in step S43 to form the battery array 101.

[0074] In the embodiments of this application, such as Figure 10As shown, (n-1) / 2 whole battery cells 20a are first cut to obtain (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22. These are then arranged alternately along the first direction X in the pattern "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-..." to form a second battery array 101b. Next, one of the first battery cells 21 pre-stored in step S31 or S33 is placed at the end of the previously obtained second battery array 101b as the nth battery cell 20. Then, (n-1) / 2 whole battery cells 20a are cut into (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22. Along the first direction X, the cut first battery cells 21 and second battery cells 22 are arranged alternately after the nth battery cell 20 in the pattern of "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-...". Finally, the other first battery cell 21 pre-stored in step S31 or step S33 is placed at the end of the second battery array 101b as the 2nth battery cell 20, forming the final battery array 101.

[0075] Thus, the second battery array 101b can be prepared through steps S41 to S44, so as to further prepare the second battery string 12. Furthermore, the battery array 101 preparation method of this embodiment allows the cutting cycle of the battery cells 20 to match the stacking cycle of the battery cells 20, facilitating assembly line production and improving production efficiency. In addition, the remaining first battery cells 21 from steps S31 and S33 can be utilized, ensuring full utilization of the cut battery cells 20 and avoiding excess battery cells 20.

[0076] In some embodiments, such as Figure 12 As shown, the first battery string 11 is prepared from the battery array 101 in step S34, as follows: Figure 13 As shown, the second battery string 12 is prepared from the battery array 101 in step S44, and then, as... Figure 14 As shown, the first battery string 11 and the second battery string 12 are arranged alternately along the second direction Y to form a battery string array; then, the first battery string 11 and the second battery string 12 are connected in series and parallel through a busbar 40 to obtain a photovoltaic module. It should be understood that... Figure 14 The diagram only shows the connection structure of a first battery string 11 and a second battery string 12. In actual applications, the number of the first battery string 11 and the second battery string 12 can be flexibly set and is not limited here.

[0077] In other embodiments, such as Figure 12As shown, a first battery string 11 is prepared from the battery array 101 described in step S34, and multiple first battery strings 11 are prepared. A portion of the first battery strings 11 are rotated 180° to obtain a second battery string 12. Furthermore, as... Figure 14 As shown, the first battery string 11 and the second battery string 12 are arranged alternately along the second direction Y to form a battery string array; then the first battery string 11 and the second battery string 12 are connected in series and parallel through the bus 40 to obtain a photovoltaic module.

[0078] It should be noted that the specific steps for preparing the battery string 10 from the battery array 101 can be performed with reference to the aforementioned step 102, and will not be repeated here.

[0079] In another embodiment, such as Figure 11 As shown, if n is set to an odd number, step S1 above may also include: S51. Provide (n-1) / 2 whole battery cells 20a, cut them to form (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22, and arrange the cut first battery cells 21 and second battery cells 22 alternately along the first direction X to form a second battery array 101b; S52. Provide one whole battery cell 20a, cut it to form a first battery cell 21 and a second battery cell 22, arrange the first battery cell 21 at the tail end of the second battery array 101b, and pre-store the remaining second battery cell 22. S53. Provide (n-1) / 2 whole battery cells 20a, cut them to form (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22, and arrange the cut first battery cells 21 and second battery cells 22 alternately behind the second battery array 101b obtained in step S52 along the fabrication direction of the battery cells 20. S54. Provide one whole battery cell 20a, cut it to form the first battery cell 21 and the second battery cell 22, arrange the first battery cell 21 at the tail of the second battery array 101b obtained in step S53 to form the battery array 101, and pre-store the remaining second battery cell 22.

[0080] In the embodiments of this application, such as Figure 11As shown, (n-1) / 2 whole battery cells 20a are first cut into (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22. Along the first direction X, the cut first battery cells 21 and second battery cells 22 are arranged in the pattern "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-..." to form a second battery array 101b. Next, one whole battery cell 20a is cut into first battery cells 21 and second battery cells 22. The first battery cells 21 are placed at the end of the previously obtained second battery array 101b as the nth battery cell 20, and the remaining second battery cells 22 are pre-stored. Then, (n-1) / 2 whole battery cells 20a are cut into (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22. Again, following the arrangement of "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-…", the cut first battery cells 21 and second battery cells 22 are arranged after the nth battery cell 20. Finally, one whole battery cell 20a is cut into first battery cells 21 and second battery cells 22. The first battery cells 21 are arranged at the end of the second battery array 101b as the 2nth battery cell 20, and the remaining second battery cells 22 are pre-stored, thus arranging a battery array 101 containing 2n battery cells 20.

[0081] Thus, the second battery array 101b can be prepared through steps S51 to S54, so as to further prepare the second battery string 12. Furthermore, the battery array 101 preparation method of this embodiment allows the cutting cycle of the battery cells 20 to match the stacking cycle of the battery cells 20, facilitating assembly line production and improving production efficiency.

[0082] Furthermore, such as Figure 11 As shown, after step S54, the preparation method further includes: S61. The second battery cell 22 pre-stored in step S51 or step S53 is used as the first battery cell 20 of the battery array 101. S62. Provide (n-1) / 2 whole battery cells 20a, cut them to form (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22, and arrange the cut first battery cells 21 and second battery cells 22 alternately behind the first battery cell 20 along the first direction X to form a first battery array 101a; S63. Arrange another second battery cell 22 pre-stored in step S51 or step S53 at the tail end of the first battery array 101a. S64. Provide (n-1) / 2 whole battery cells 20a, cut them to form (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22, and arrange the cut first battery cells 21 and second battery cells 22 alternately behind the first battery array 101a obtained in step S63 along the fabrication direction of the battery cells 20 to form the battery array 101.

[0083] In the embodiments of this application, such as Figure 11 As shown, the second battery cell 22 pre-stored in step S51 or step S53 is first placed at the beginning of the battery array 101 as the first battery cell 20. Next, (n-1) / 2 whole battery cells 20a are cut to obtain (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22. Along the first direction X, following the arrangement of "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-…", the cut first battery cells 21 and second battery cells 22 are alternately arranged after the first battery cell 20 to form the first battery array 101a. Then, another second battery cell 22 pre-stored in step S51 or step S53 is arranged at the end of the first battery array 101a as the (n+1)th battery cell 20. Then, (n-1) / 2 whole battery cells 20a are cut into (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22. The cut first battery cells 21 and second battery cells 22 are then arranged alternately after the (n+1)th battery cell 20 according to the arrangement of "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-...", thus arranging the battery array 101.

[0084] Thus, the first battery array 101a can be prepared through steps S61 to S64, so as to further prepare the first battery string 11. Furthermore, the battery array 101 preparation method of this embodiment allows the cutting cycle of the battery cells 20 to match the stacking cycle of the battery cells 20, facilitating assembly line production and improving production efficiency. In addition, the remaining second battery cells 22 from steps S52 and S54 can be utilized, ensuring full utilization of the cut battery cells 20 and avoiding excess battery cells 20.

[0085] In some embodiments, such as Figure 12 As shown, the first battery string 11 is prepared from the battery array 101 in step S64, as follows: Figure 13 As shown, the second battery string 12 is prepared from the battery array 101 in step S54, and then, as... Figure 14As shown, the first battery string 11 and the second battery string 12 are arranged alternately along the second direction Y to form a battery string array; then, the first battery string 11 and the second battery string 12 are connected in series and parallel through a busbar 40 to obtain a photovoltaic module. It should be understood that... Figure 14 The diagram only shows the connection structure of a first battery string 11 and a second battery string 12. In actual applications, the number of the first battery string 11 and the second battery string 12 can be flexibly set and is not limited here.

[0086] In other embodiments, such as Figure 13 As shown, a second battery string 12 is prepared from the battery array 101 described in step S54, and multiple second battery strings 12 are prepared. A portion of the second battery strings 12 are rotated 180° to obtain a first battery string 11. Furthermore, as... Figure 14 As shown, the first battery string 11 and the second battery string 12 are arranged alternately along the second direction Y to form a battery string array; then the first battery string 11 and the second battery string 12 are connected in series and parallel through the bus 40 to obtain a photovoltaic module.

[0087] It should be noted that the specific steps for preparing the first battery string 11 or the second battery string 12 from the battery array 101 can be performed with reference to the aforementioned step 102, and will not be repeated here.

[0088] Optionally, such as Figure 15 and Figure 16 As shown, the battery cell 20 includes a first battery cell 21 and a second battery cell 22. The first battery cell 21 and the second battery cell 22 are cut from a whole battery cell 20a. The electrode pattern on the first battery cell 21 is axially symmetrical to the electrode pattern on the second battery cell 22. Then step 101 includes: M1. The battery array 101 is formed by alternately arranging n first battery cells 21 and n second battery cells 22 along the first direction X.

[0089] like Figure 15 As shown, in this embodiment of the application, the incoming battery cell is a whole battery cell 20a. Before stacking, the whole battery cell 20a is cut into a first battery cell 21 (denoted as A) and a second battery cell 22 (denoted as B). The electrode patterns on the first battery cell 21 and the second battery cell 22, which are formed by cutting the same whole battery cell 20a, are axially symmetrical. That is, the electrode pattern on the second battery cell 22 can be obtained by mirroring the electrode pattern on the first battery cell 21 along the axis of symmetry (e.g., at the cutting line); or, the electrode pattern on the first battery cell 21 can be obtained by mirroring the electrode pattern on the second battery cell 22 along the axis of symmetry (e.g., at the cutting line).

[0090] It should be understood that the electrode pattern refers to the arrangement of two electrode components with opposite conductivity types on the solar cell. For example... Figure 15 As shown, along the direction from left to right, the electrode arrangement structure on the first battery cell 21 and the second battery cell 22 is: first electrode component 201-second electrode component 202-first electrode component 201-second electrode component 202-…….

[0091] Furthermore, such as Figure 15 As shown, rotating the first battery cell 21 by 180° yields the first inverted battery cell 21', and rotating the second battery cell 22 by 180° yields the second inverted battery cell 22'. Similarly, the first inverted battery cell 21' and the second inverted battery cell 22' are axially symmetrical.

[0092] It should be understood that the phrase "the first battery cell 21 and the second battery cell 22 are arranged alternately along the first direction X" in the embodiments of this application means that the first battery cell 21 and the second battery cell 22 need to be arranged alternately along the first direction X, and is not limited to the first battery cell 21 and the second battery cell 22 being arranged in a one-to-one manner. In the battery array 101 formed by the arrangement, one or two second battery cells 22 may be provided between two adjacent first battery cells 21, or one or two first battery cells 21 may be provided between two adjacent second battery cells 22. Furthermore, the first battery cell 20 can be either a first battery cell 21 or a second battery cell 22.

[0093] In one embodiment, such as Figure 16 As shown, if n is even, step M1 above may include: M11. Provide n / 2 whole battery cells 20a, cut them into n / 2 first battery cells 21 and n / 2 second battery cells 22, and arrange the cut first battery cells 21 and second battery cells 22 alternately along the first direction X to form a first battery array 101a; M12. Provide n / 2 whole battery cells 20a, cut them to form n / 2 first battery cells 21 and n / 2 second battery cells 22, and arrange the cut second battery cells 22 and first battery cells 21 alternately behind the first battery array 101a along the first direction X to form the battery array 101; wherein, all the second battery cells 22 are rotated 180°.

[0094] In this embodiment, n / 2 whole battery cells 20a are cut to obtain n / 2 first battery cells 21 and n / 2 second battery cells 22. Then, along the first direction X, the cut first battery cells 21 and second battery cells 22 are alternately arranged in sequence according to the arrangement of "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-..." to form a first battery array 101a. Then, n / 2 whole battery cells 20a are cut to obtain n / 2 first battery cells 21 and n / 2 second battery cells 22. And, according to the arrangement of "second battery cell 22-first battery cell 21-second battery cell 22-first battery cell 21-...", the cut second battery cells 22 and first battery cells 21 are alternately arranged along the first direction X behind the first battery array 101a to form a battery array 101. All the second battery cells 22 in the battery array 101 are rotated 180° to obtain the final battery array 101. The cell arrangement method of this application embodiment is simple and efficient to operate, and can make the cell cutting operation and cell arrangement operation of the cell 20 be carried out simultaneously, thereby optimizing the production cycle and improving the cell arrangement efficiency of the cell string 10.

[0095] In addition, such as Figure 15 As shown, both the first solar cell 21 and the second solar cell 22 have two opposing sides along the first direction X. One side has chamfered ends, and this side is called the chamfered edge A2; the other side does not have chamfered ends, and this side is called the right-angled edge A1. The chamfered edge A2 is the uncut edge of the solar cell 20, formed during silicon wafer processing, while the right-angled edge A1 is formed when the entire solar cell 20a is cut, and is more prone to breakage than the chamfered edge A2. Figure 16 As shown, by adopting the arrangement method of this application embodiment, the chamfered edge A2 of all battery cells 20 in the battery array 101 can face one side and the right angle edge A1 can face the other side. In this way, during the subsequent lamination process, the stress of the adhesive flow on both sides of the battery cell 20 is more uniform, thereby reducing the risk of microcracks in the battery cell 20.

[0096] It should be noted that, in this embodiment, the rotation operation of the second battery cell 22 can be performed simultaneously with the transfer mechanism during the transfer of the second battery cell 22, or it can be performed after the arrangement of the first battery cell 21 and the second battery cell 22 is completed, and then the battery cell transfer mechanism is used to rotate all the second battery cells 22 at the same time. As long as the second battery cell 22 can be rotated by 180°, the specific operation sequence can be flexibly set according to the actual situation and is not limited here.

[0097] Furthermore, such as Figure 17As shown, by laying solder ribbon 31 on the battery array 101 in step 102, the first battery string 11 can be prepared from the battery array 101 obtained in step M12.

[0098] In some embodiments, in the battery array 101, along the arrangement direction of the battery cells 20, each first battery cell 21 and its adjacent second battery cell 22 come from the same whole battery cell 20a; or, each second battery cell 22 and its adjacent first battery cell 21 come from the same whole battery cell 20a. This facilitates the synchronization of the cutting and stacking operations of the battery cells 20, thereby optimizing the production cycle.

[0099] In another embodiment, such as Figure 16 As shown, n is set to an even number, and step M1 may include: M21. Provide n / 2 whole battery cells 20a, cut them into n / 2 first battery cells 21 and n / 2 second battery cells 22, and arrange the cut second battery cells 22 and first battery cells 21 alternately along the first direction X to form a second battery array 101b; M22, providing n / 2 whole battery cells 20a, cutting them into n / 2 first battery cells 21 and n / 2 second battery cells 22, and arranging the cut first battery cells 21 and second battery cells 22 alternately behind the second battery array 101b along the first direction X to form the battery array 101; wherein, all the second battery cells 22 are rotated 180°.

[0100] In this embodiment, n / 2 whole battery cells 20a are cut to obtain n / 2 first battery cells 21 and n / 2 second battery cells 22. Then, along the first direction X, the cut second battery cells 22 and first battery cells 21 are alternately arranged in sequence according to the arrangement of "second battery cell 22-first battery cell 21-second battery cell 22-first battery cell 21-..." to form a second battery array 101b. Then, n / 2 whole battery cells 20a are cut to obtain n / 2 first battery cells 21 and n / 2 second battery cells 22. And, according to the arrangement of "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-...", the cut first battery cells 21 and second battery cells 22 are alternately arranged along the first direction X behind the second battery array 101b to form a battery array 101. All the second battery cells 22 in the battery array 101 are rotated 180° to obtain the final battery array 101. The battery cell 20 arrangement method adopted in this application embodiment is simple and efficient to operate. It can make the battery cell 20 cutting operation and the battery cell 20 arrangement operation synchronized, thereby optimizing the production cycle and improving the arrangement efficiency of the battery string 10.

[0101] Furthermore, by adopting the arrangement method of this application embodiment, the chamfered edges A2 of all battery cells 20 in the battery array 101 can face one side, and the right-angled edges A1 can face the other side. In this way, during the subsequent lamination process, the stress of the adhesive flow on both sides of the battery cell 20 is more uniform, thereby reducing the risk of microcracks in the battery cell 20.

[0102] It should be understood that the rotation operation of the second battery cell 22 in this embodiment can be performed with reference to the foregoing embodiments, and will not be repeated here.

[0103] Furthermore, such as Figure 18 As shown, by laying solder ribbon 31 on the battery array 101 in step 102, the second battery string 12 can be prepared from the battery array 101 obtained in step M22.

[0104] Furthermore, such as Figure 19 As shown, the first battery string 11 and the second battery string 12 are arranged alternately along the second direction Y to form a battery string array, and the first battery string 11 and the second battery string 12 are connected in series and parallel by solder strip 31 to prepare a photovoltaic module. Figure 19 Only one first battery string 11 and one second battery string 12 are shown for illustration purposes; the number of first battery strings 11 and second battery strings 12 is not limited.

[0105] In one embodiment, such as Figure 20 As shown, n is set to an even number, and step M1 may include: M31. Provide n whole battery cells 20a, cut them to form n first battery cells 21 and n second battery cells 22, arrange the cut first battery cells 21 and second battery cells 22 alternately along the first direction X; rotate the even-numbered second battery cells 22 in the first to nth battery cells 20 by 180°, and rotate the odd-numbered first battery cells 21 in the (n+1)th to 2nth battery cells 20 by 180° to form the battery array 101.

[0106] In the embodiments of this application, such as Figure 20 As shown, by cutting n whole battery cells 20a into n first battery cells 21 and n second battery cells 22, and arranging the cut first battery cells 21 and second battery cells 22 along the first direction X in the pattern of "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-...", a battery array 101 is formed. The even-numbered second battery cells 22 in the first to nth battery cells 20 of the battery array 101 are rotated by 180°, and the odd-numbered first battery cells 21 in the (n+1)th to 2nth battery cells 20 are rotated by 180°, thus obtaining the final battery array 101. Using the arrangement method of this embodiment, it is only necessary to arrange the two types of cut battery cells 20 in sequence, making the operation simple and convenient. Furthermore, in the battery array 101, the chamfered edges A2 of the first n battery cells 20 face to one side, and the chamfered edges A2 of the last n battery cells 20 face to the other side, in order to balance the stress on both sides of the battery cells 20 during the lamination process and reduce the risk of microcracks appearing at the edges of the battery cells 20. Moreover, the right-angled edges A1 of the nth battery cell 20 and the (n+1)th battery cell 20 are arranged opposite each other, which facilitates the identification and differentiation of the two half-strings of batteries, so as to facilitate the subsequent setting operation of the intermediate busbar 42.

[0107] Furthermore, such as Figure 21 As shown, by laying solder ribbon 31 on the battery array 101 in step 102, the first battery string 11 can be prepared from the battery array 101 obtained in step M31.

[0108] In another embodiment, such as Figure 20 As shown, n is set to an even number, and step M1 may also include: M41. Provide n whole battery cells 20a, cut them to form n first battery cells 21 and n second battery cells 22, and arrange the cut second battery cells 22 and first battery cells 21 alternately along the first direction X; rotate the odd-numbered second battery cells 22 in the first to nth battery cells 20 by 180°, and rotate the even-numbered first battery cells 21 in the n+1 to 2nth battery cells 20 by 180° to form the battery array 101.

[0109] In the embodiments of this application, such as Figure 20 As shown, by cutting n whole battery cells 20a into n first battery cells 21 and n second battery cells 22, and arranging the cut second battery cells 22 and first battery cells 21 along the first direction X in the pattern of "second battery cell 22-first battery cell 21-second battery cell 22-first battery cell 21-...", a battery array 101 is formed. The odd-numbered second battery cells 22 in the first to nth battery cells 20 of the battery array 101 are rotated by 180°, and the even-numbered first battery cells 21 in the (n+1)th to 2nth battery cells 20 are rotated by 180°, thus obtaining the final battery array 101. Using the arrangement method of this embodiment, it is only necessary to arrange the two types of cut battery cells 20 in sequence, making the operation simple and convenient. Furthermore, in the battery array 101, the chamfered edges A2 of the first n battery cells 20 face to one side, and the chamfered edges A2 of the last n battery cells 20 face to the other side, in order to balance the stress on both sides of the battery cells 20 during the lamination process and reduce the risk of microcracks appearing at the edges of the battery cells 20. Moreover, the right-angled edges A1 of the nth battery cell 20 and the (n+1)th battery cell 20 are arranged opposite each other, which facilitates the identification and differentiation of the two half-strings of batteries, so as to facilitate the subsequent setting operation of the intermediate busbar 42.

[0110] Furthermore, such as Figure 22 As shown, by laying solder ribbon 31 on the battery array 101 in step 102, the second battery string 12 can be prepared from the battery array 101 obtained in step M41.

[0111] Furthermore, as shown in Figure 23, the prepared first battery string 11 and second battery string 12 are arranged alternately along the second direction Y to form a battery string array, and the first battery string 11 and second battery string 12 are connected in series and parallel through the busbar 40 to prepare a photovoltaic module. Figure 23 Only one first battery string 11 and one second battery string 12 are shown for illustration purposes; the number of first battery strings 11 and second battery strings 12 is not limited.

[0112] In one embodiment, such as Figure 24As shown, n is set to an odd number, and step M1 may include: M51, n+1 first battery cells 21 and n-1 second battery cells 22 are obtained by cutting the whole battery cell 20a; (n+1) / 2 of the first battery cells 21 and (n-1) / 2 of the second battery cells 22 are arranged alternately along the first direction X to form a first battery array 101a; M52. The remaining (n+1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22 are arranged alternately in sequence along the first direction X behind the first battery array 101a to form the battery array 101; wherein, all the second battery cells 22 are rotated 180°.

[0113] Specifically, such as Figure 24 As shown, by cutting n+1 whole solar cells 20a into n+1 first solar cells 21 and n+1 second solar cells 22, the n+1 first solar cells 21 and n-1 second solar cells 22 are arranged in a grid, and the two extra second solar cells 22 are pre-stored for use in the subsequent fabrication of other solar cell strings 10. Using the arrangement method of this embodiment, the chamfered edges A2 of all solar cells 20 in the solar cell array 101 can face the same side. This allows for a more balanced distribution of the adhesive flow stress on both sides of the solar cell 20 during subsequent lamination, thereby reducing the risk of microcracks appearing at the edges of the solar cell 20.

[0114] Furthermore, such as Figure 25 As shown, by laying solder ribbon 31 on the battery array 101 in step 102, the first battery string 11 can be prepared from the battery array 101 obtained in step M52.

[0115] It should be noted that the rotation operation of the second battery cell 22 in this embodiment can be performed by rotating the second battery cell 22 simultaneously during the transfer of the second battery cell 22, or by rotating all the second battery cells 22 at the same time after the battery cells 20 are arranged. No limitation is made here.

[0116] It should be understood that, in the embodiments of this application, when preparing the first battery array 101a, n+1 first battery cells 21 and n-1 second battery cells 22 are required. If the n+1 whole battery cells 20a are cut, then during the cell arrangement process, two second battery cells 22 need to be pre-stored. The following lists two methods for pre-stored second battery cells 22: The first embodiment, such as Figure 24As shown, a single whole battery cell 20a can be cut into a first battery cell 21 and a second battery cell 22. The first battery cell 21 is used as the first battery cell 20 of the battery array 101, and the remaining second battery cells 22 are pre-stored. Then, (n-1) / 2 whole battery cells 20a are cut into (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22. The cut second battery cells 22 and first battery cells 21 are arranged sequentially along the first direction X after the first battery cell 20 in the pattern of "second battery cell 22-first battery cell 21-second battery cell 22-first battery cell 21-..." to obtain the first battery array 101a. Next, a single battery cell 20a is cut to obtain a first battery cell 21 and a second battery cell 22. The first battery cell 21 is arranged at the end of the first battery array 101a as the (n+1)th battery cell 20, and the remaining second battery cells 22 are pre-stored. Then, (n-1) / 2 single battery cells 20a are cut to obtain (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22. Along the first direction X, the cut second battery cells 22 and first battery cells 21 are arranged alternately after the (n+1)th battery cell 20 in the pattern of "second battery cell 22-first battery cell 21-second battery cell 22-first battery cell 21-..." to obtain the battery array 101. All the second battery cells 22 in the battery array 101 are rotated 180° to obtain the final first battery array 101a.

[0117] In the second embodiment, (n-1) / 2 whole battery cells 20a can be cut into (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22. The cut first battery cells 21 and second battery cells 22 are then arranged along the first direction X in the pattern "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-..." to form a first battery array 101a. Next, one whole battery cell 20a is cut into first battery cells 21 and second battery cells 22. The first battery cells 21 are arranged after the first battery array 101a as the nth battery cell 20, and the remaining second battery cells 22 are pre-stored. Then, (n-1) / 2 whole battery cells 20a are cut to obtain (n-1) / 2 first battery cells 21 and (n-1) / 2 second battery cells 22. Along the first direction X, the cut first battery cells 21 and second battery cells 22 are arranged alternately after the nth battery cell 20 in the pattern "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-...". Finally, one whole battery cell 20a is cut to obtain first battery cells 21 and second battery cells 22. The tail end of the first battery array 101a is taken as the 2nth battery cell 20, and the remaining second battery cells 22 are pre-stored. All the second battery cells 22 in the battery array 101 are rotated 180° to obtain the final first battery array 101a.

[0118] Of course, other methods of pre-storing the second battery cells 22 can also be used during the arrangement of the first battery array 101a, as long as the second battery array 101a that meets the requirements can be arranged. There are no restrictions on this. The two pre-stored second battery cells 22 can be used for the preparation of the second battery array 101b.

[0119] In another embodiment, such as Figure 24 As shown, n is set to an odd number, and step M1 may also include: M61. The whole battery cell 20a is cut to obtain n+1 second battery cells 22 and n-1 first battery cells 21; (n+1) / 2 of the second battery cells 22 and (n-1) / 2 of the first battery cells 21 are arranged alternately along the first direction X to form a second battery array 101b; M62. Arrange the remaining (n+1) / 2 second battery cells 22 and (n-1) / 2 first battery cells 21 behind the second battery array 101b to form the battery array 101; wherein, all the second battery cells 22 are rotated 180°.

[0120] Specifically, such as Figure 24As shown, n+1 second battery cells 22 and n-1 first battery cells 21 are obtained by cutting a whole battery cell 20a. Specifically, n-1 second battery cells 22 and n-1 first battery cells 21 can be obtained by cutting n-1 whole battery cells 20a. The extra 2 second battery cells 22 can be the remaining second battery cells 22 from the aforementioned step M51. Alternatively, n+1 whole battery cells 20a can be directly cut, and n+1 second battery cells 22 and n-1 first battery cells 21 can be selected for arrangement. The remaining 2 first battery cells 21 can be used for the preparation of other battery strings 10.

[0121] By adopting the arrangement method of this application embodiment, the chamfered edges A2 of all the battery cells 20 in the battery array 101 can face the same side. In this way, the flow stress of the adhesive on both sides of the battery cell 20 can be more balanced during the subsequent lamination process, thereby reducing the risk of microcracks appearing at the edges of the battery cell 20.

[0122] It should be understood that the arrangement of the first battery cell 21 and the second battery cell 22 in steps M61-M62 can refer to the arrangement in steps M51-M52 above. Only the positions of the first battery cell 21 and the second battery cell 22 need to be interchanged. This will not be elaborated further here.

[0123] Furthermore, such as Figure 26 As shown, by laying solder ribbon 31 on the battery array 101 in step 102, the second battery string 12 can be prepared from the battery array 101 obtained in step M62.

[0124] Furthermore, such as Figure 27 As shown, the first battery string 11 and the second battery string 12 are arranged alternately along the second direction Y to form a battery string array, and the first battery string 11 and the second battery string 12 are connected in series and parallel through the bus 40 to prepare a photovoltaic module. Figure 27 Only one first battery string 11 and one second battery string 12 are shown for illustration purposes; the number of first battery strings 11 and second battery strings 12 is not limited.

[0125] In one embodiment, such as Figure 28 As shown, n is set to an odd number, and step M1 may include: M71. The entire battery cell 20a is cut to obtain n first battery cells 21 and n second battery cells 22. The first battery cells 21 and the second battery cells 22 are arranged alternately along the first direction X. The even-numbered second battery cells 22 in the first to nth battery cells 20 are rotated by 180°, and the even-numbered first battery cells 21 in the (n+1)th to 2nth battery cells 20 are rotated by 180° to form the battery array 101.

[0126] In this embodiment of the application, n whole battery cells 20a are cut to obtain n first battery cells 21 and n second battery cells 22. The cut first battery cells 21 and second battery cells 22 are arranged alternately along the first direction X in the manner of "first battery cell 21-second battery cell 22-first battery cell 21-second battery cell 22-..." to obtain a battery array 101. Then, the even-numbered second battery cells 22 in the first to nth battery cells 20 in the battery array 101 are rotated by 180°, and the even-numbered first battery cells 21 in the (n+1)th to 2nth battery cells 20 are rotated by 180° to obtain the final battery array 101.

[0127] Using the arrangement method of this application embodiment, a battery array 101 with a single structure can be prepared simply by arranging the two types of cut battery cells 20 in sequence, making the operation simple and convenient. Furthermore, in the battery array 101, the chamfered edges A2 of the first n battery cells 20 face one side, and the chamfered edges A2 of the last n battery cells 20 face the other side, to balance the stress on both sides of the battery cells 20 during the lamination process and reduce the risk of microcracks appearing at the edges of the battery cells 20. Moreover, the right-angled edges A1 of the nth battery cell 20 and the (n+1)th battery cell 20 are arranged opposite each other, which facilitates the identification and differentiation of the two half-strings of batteries, facilitating the subsequent installation of the intermediate busbar 42.

[0128] Furthermore, such as Figure 29 As shown, by laying solder ribbon 31 on the battery array 101 in step 102, the first battery string 11 can be prepared from the battery array 101 obtained in step M71.

[0129] In another embodiment, such as Figure 28 As shown, n is set to an odd number, and step M1 may also include: M81. The entire battery cell 20a is cut to obtain n first battery cells 21 and n second battery cells 22. The second battery cells 22 and the first battery cells 21 are arranged alternately along the first direction X. The odd-numbered second battery cells 22 in the first to nth battery cells 20 are rotated by 180°, and the odd-numbered first battery cells 21 in the (n+1)th to 2nth battery cells 20 are rotated by 180° to form the battery array 101.

[0130] In this embodiment of the application, n whole battery cells 20a are cut to obtain n first battery cells 21 and n second battery cells 22. The cut second battery cells 22 and first battery cells 21 are arranged alternately along the first direction X in the manner of "second battery cell 22-first battery cell 21-second battery cell 22-first battery cell 21-..." to obtain a battery array 101. Then, the odd-numbered second battery cells 22 in the first to nth battery cells 20 in the battery array 101 are rotated by 180°, and the odd-numbered first battery cells 21 in the (n+1)th to 2nth battery cells 20 are rotated by 180° to obtain the final battery array 101.

[0131] Using the arrangement method of this application embodiment, the two types of cut battery cells 20 can be arranged in sequence to prepare another structure of battery array 101, which is simple and convenient to operate. In addition, in battery array 101, the chamfered edges A2 of the first n battery cells 20 face to one side, and the chamfered edges A2 of the last n battery cells 20 face to the other side, so as to balance the stress on both sides of the battery cells 20 during the lamination process and reduce the risk of microcracks appearing at the edges of the battery cells 20. Moreover, the right-angled edges A1 of the nth battery cell 20 and the (n+1)th battery cell 20 are arranged opposite each other, which facilitates the identification and differentiation of the two half-strings of battery cells, so as to facilitate the subsequent setting operation of the intermediate busbar 42.

[0132] Furthermore, such as Figure 30 As shown, by laying solder ribbon 31 on the battery array 101 in step 102, the second battery string 12 can be prepared from the battery array 101 obtained in step M81.

[0133] Furthermore, such as Figure 31 As shown, the first battery string 11 and the second battery string 12 are arranged alternately along the second direction Y to form a battery string array, and the first battery string 11 and the second battery string 12 are connected in series and parallel through the bus 40 to prepare a photovoltaic module. Figure 31 Only one first battery string 11 and one second battery string 12 are shown for illustration purposes; the number of first battery strings 11 and second battery strings 12 is not limited.

[0134] In some embodiments, when fabricating the battery array 101, the battery cells 20 are arranged in a stacked manner, that is, the edges of adjacent battery cells 20 at least partially overlap. Furthermore, as... Figure 15As shown, the battery cell 20 is configured as a segmented battery cell 20, and the battery cell 20 has a right-angled edge A1 and a chamfered edge A2 arranged opposite each other along the first direction X. During the arrangement of the battery cells, for two adjacent battery cells 20 in the first direction X, the edge of one battery cell 20 with the right-angled edge A1 at least partially overlaps the edge of the other battery cell 20 with the chamfered edge A2, and the chamfered edge A2 is located on the side of the right-angled edge A1 facing the light-receiving surface of the battery string 10.

[0135] Since the chamfered edge A2 of the solar cell 20 is formed during the silicon wafer manufacturing process, its structure is relatively stable. Furthermore, as the solar cell 20 is processed, a passivation layer forms on the side corresponding to the chamfered edge A1, which reduces carrier recombination at the chamfered edge A2. However, the right-angled edge A1 of the solar cell 20 is formed by directly cutting the entire solar cell 20a, resulting in cutting damage and severe carrier recombination at the right-angled edge A1. Therefore, in this embodiment, by covering the right-angled edge A1 of the solar cell 20 with the chamfered edge A2 of the adjacent solar cell 20, the undamaged chamfered edge A2 in the final photovoltaic module directly faces the sunlight, improving the absorption efficiency of sunlight and thus enhancing the overall conversion efficiency of the photovoltaic module.

[0136] In some embodiments, such as Figure 32 and Figure 33 As shown, the battery cell 20 is a half-cell battery cell 20b, and n is set to an even number. Then step 101 may include: F11. Arrange the 2n half-cell battery cells 20b sequentially along the first direction X; F12. Along the first direction X, rotate the even-numbered half-cells 20b of the first to nth cell 20 by 180°, and rotate the odd-numbered half-cells 20b of the (n+1)th to 2nth cell 20 by 180° to form the battery array 101.

[0137] In this embodiment, the incoming material is a half-cell battery 20b. Then, 2n half-cell batteries 20b are arranged sequentially along the first direction X to form a battery array 101. The even-numbered half-cell batteries 20b from the 1st to the nth cell 20 in the battery array 101 are rotated 180°, and the odd-numbered half-cell batteries 20b from the (n+1)th to the 2nth cell 20 are rotated 180°, thus obtaining the final battery array 101 (i.e., the first battery array 101a). Using the battery cell 20 arrangement method of this embodiment, only one type of battery cell 20 structure is needed to arrange the required battery array 101, facilitating actual processing operations.

[0138] It should be understood that the rotation operation of half battery cell 20b can be performed simultaneously during the transfer of half battery cell 20b, or it can be performed uniformly on half battery cell 20b after all half battery cells 20b have been arranged. There is no limitation on which one is rotated.

[0139] Furthermore, such as Figure 34 As shown, referring to step 102, solder ribbons 31 are laid on the battery array 101. Then, a first battery string 11 is prepared from the battery array 101 in step F12, and multiple first battery strings 11 are prepared. A portion of the first battery strings 11 is rotated 180° to obtain a second battery string 12. For example... Figure 36 As shown, a photovoltaic module can be fabricated by alternately arranging the first battery string 11 and the second battery string 12 along the second direction Y, and connecting them in series and parallel through a busbar 40. Figure 36 Only one first battery string 11 and one second battery string 12 are shown for illustration purposes; the number of first battery strings 11 and second battery strings 12 is not limited.

[0140] In other embodiments, such as Figure 32 and Figure 33 As shown, the battery cell 20 is a half-cell battery cell 20b, and n is set to an even number. Then step 101 may include: F11. Arrange the 2n half-cell battery cells 20b sequentially along the first direction X; F13. Along the first direction X, rotate the odd-numbered half-cells 20b of the first to nth cell 20 by 180°, and rotate the even-numbered half-cells 20b of the (n+1)th to 2nth cell 20 by 180° to form the battery array 101.

[0141] In this embodiment, the incoming material is a half-cell battery 20b. Then, 2n half-cell batteries 20b are arranged sequentially along the first direction X to form a battery array 101. The odd-numbered half-cell batteries 20b from the 1st to the nth cell 20 in the battery array 101 are rotated 180°, and the even-numbered half-cell batteries 20b from the (n+1)th to the 2nth cell 20 are rotated 180°, thus obtaining the final battery array 101 (i.e., the second battery array 101b). Using the battery cell 20 arrangement method of this embodiment, only one type of battery cell 20 structure is needed to arrange a satisfactory battery array 101, facilitating actual processing operations.

[0142] It should be understood that the rotation operation of half battery cell 20b can be performed simultaneously during the transfer of half battery cell 20b, or it can be performed uniformly on half battery cell 20b after all half battery cells 20b have been arranged. There is no limitation on which one is rotated.

[0143] Furthermore, such as Figure 35 As shown, referring to step 102, solder ribbon 31 is laid on the battery array 101. Then, a second battery string 12 is prepared from the battery array 101 in step F13, and multiple second battery strings 12 are prepared. A portion of the second battery strings 12 is rotated 180° to obtain a first battery string 11. Figure 36 As shown, a photovoltaic module can be prepared by arranging the first battery string 11 and the second battery string 12 alternately along the second direction Y and connecting the first battery string 11 and the second battery string 12 in series and parallel through the busbar 40.

[0144] In some embodiments, a first battery string 11 can be prepared from the battery array 101 in step F12, and a second battery string 12 can be prepared from the battery array 101 in step F13. Then, the first battery string 11 and the second battery string 12 are arranged alternately along the second direction Y, and the first battery string 11 and the second battery string 12 are connected in series and parallel through the busbar 40 to prepare a photovoltaic module.

[0145] In some embodiments, the battery cell 20 is a half-cell battery cell 20b, and n is set to an odd number, then step 101 may include: F21. Arrange the 2n half-cell battery cells 20b sequentially along the first direction X; F22. Along the first direction X, rotate the odd-numbered half-cells 20b of the first to nth cell 20 by 180°, and rotate the odd-numbered half-cells 20b of the (n+1)th to 2nth cell 20 by 180° to form the battery array 101.

[0146] In this embodiment, the incoming material is a half-cell battery 20b. Then, 2n half-cell batteries 20b are arranged sequentially along the first direction X to form a battery array 101. The odd-numbered half-cell batteries 20b from the 1st to the nth battery cells 20 in the battery array 101 are rotated by 180°, and the odd-numbered half-cell batteries 20b from the (n+1)th to the 2nth battery cells 20 are rotated by 180° to obtain the final battery array 101 (i.e., the first battery array 101a). Using the battery cell 20 arrangement method of this embodiment, only one type of battery cell 20 structure is needed to arrange the required battery array 101, facilitating actual processing operations.

[0147] It should be understood that the rotation operation of half battery cell 20b can be performed simultaneously during the transfer of half battery cell 20b, or it can be performed uniformly on half battery cell 20b after all half battery cells 20b have been arranged. There is no limitation on which one is rotated.

[0148] Furthermore, such as Figure 38 As shown, referring to step 102, solder ribbons 31 are laid on the battery array 101. Then, a first battery string 11 is prepared from the battery array 101 in step F22, and multiple first battery strings 11 are prepared. A portion of the first battery strings 11 is rotated 180° to obtain a second battery string 12. For example... Figure 40 As shown, a photovoltaic module can be fabricated by alternately arranging the first battery string 11 and the second battery string 12 along the second direction Y, and connecting them in series and parallel through a busbar 40. Figure 40 Only one first battery string 11 and one second battery string 12 are shown for illustration purposes; the number of first battery strings 11 and second battery strings 12 is not limited.

[0149] In other embodiments, such as Figure 37 As shown, if the battery cell 20 is a half-cell battery cell 20b, and n is set to an odd number, then step 101 may also include: F21. Arrange the 2n half-cell battery cells 20b sequentially along the first direction X; F23. Along the first direction X, rotate the even-numbered half-cells 20b of the first to nth cell 20 by 180°, and rotate the even-numbered half-cells 20b of the (n+1)th to 2nth cell 20 by 180° to form the battery array 101.

[0150] In this embodiment, the incoming material is a half-cell battery 20b. Then, 2n half-cell batteries 20b are arranged sequentially along the first direction X to form a battery array 101. The even-numbered half-cell batteries 20b from the 1st to the nth battery cells 20 in the battery array 101 are rotated by 180°, and the even-numbered half-cell batteries 20b from the (n+1)th to the 2nth battery cells 20 are rotated by 180° to obtain the final battery array 101 (i.e., the second battery array 101b). Using the battery cell 20 arrangement method of this embodiment, only one type of battery cell 20 structure is needed to arrange the required battery array 101, facilitating actual processing operations.

[0151] It should be understood that the rotation operation of half battery cell 20b can be performed simultaneously during the transfer of half battery cell 20b, or it can be performed uniformly on half battery cell 20b after all half battery cells 20b have been arranged. There is no limitation on which one is rotated.

[0152] Furthermore, such as Figure 39 As shown, referring to step 102, solder ribbon 31 is laid on the battery array 101. Then, a second battery string 12 is prepared from the battery array 101 in step F23, and multiple second battery strings 12 are prepared. A portion of the second battery strings 12 is rotated 180° to obtain a first battery string 11. Figure 40 As shown, a photovoltaic module can be prepared by arranging the first battery string 11 and the second battery string 12 alternately along the second direction Y and connecting the first battery string 11 and the second battery string 12 in series and parallel through the busbar 40.

[0153] Alternatively, a first battery string 11 can be prepared from the battery array 101 in step F22, and a second battery string 12 can be prepared from the battery array 101 in step F23. Then, the first battery string 11 and the second battery string 12 can be arranged alternately along the second direction Y, and the first battery string 11 and the second battery string 12 can be connected in series and parallel through the busbar 40 to prepare a photovoltaic module.

[0154] Optionally, this application embodiment also provides a photovoltaic module manufacturing apparatus for performing the manufacturing method described in the foregoing embodiments. The apparatus includes: a stringing platform, a cell transfer mechanism, and a ribbon laying mechanism; the stringing platform has a working surface for placing the cells 20; the cell transfer mechanism is disposed opposite to the stringing platform and is used to transfer the cells 20 and arrange the cells 20 along a first direction X onto the working surface; the ribbon laying mechanism is disposed opposite to the stringing platform and is used to cut and lay the ribbon 31 on the cell array 101.

[0155] In this embodiment, the battery cell transfer mechanism can transfer the battery cells 20, thereby arranging 2n battery cells 20 sequentially along the first direction X on the working surface of the stringing platform to form a battery array 101. Further, the solder ribbon laying mechanism can cut the incoming solder ribbon 31, transfer the cut solder ribbon 31, and lay it on the battery array 101, so that the first to nth battery cells 20 in the battery array 101 are connected in series via solder ribbon 31, and the (n+1)th to 2nth battery cells 20 are connected in series via solder ribbon 31, and the nth and (n+1)th battery cells 20 are connected in parallel via solder ribbon 31. In this way, an integrated battery string 10 is formed by a one-time arrangement of cells and connection of solder strips 31. The battery string 10 includes two parallel half-strings of cells. Therefore, when connecting the intermediate busbar 42, it is only necessary to place the intermediate busbar 42 between the two half-strings of cells in the battery string 10 to achieve the connection between the intermediate busbar 42 and the battery string 10, without needing to separately consider the alignment and connection of the solder strips 31 on both sides of the intermediate busbar 42. This not only facilitates the arrangement of cells but also ensures the consistency of the cell spacing in the entire battery string 10, and effectively solves the problem of misalignment of the battery strings 10 on both sides of the intermediate busbar 42 in the prior art. Furthermore, using the photovoltaic module fabrication apparatus of this application for module fabrication is simple to operate, suitable for assembly line production, and can shorten the cell string 10 arrangement cycle, thereby improving production efficiency.

[0156] Optionally, the photovoltaic module manufacturing apparatus further includes: a feeding mechanism, a slitting mechanism, a pre-storage platform, and a welding ribbon 31 pre-fixing mechanism. The feeding mechanism is used to transport whole solar cells 20a; the slitting mechanism is located at the downward station of the feeding mechanism and is used to cut the whole solar cells 20a; the pre-storage platform is located on one side of the slitting mechanism and is used to place the solar cells 20 to be pre-stored; the welding ribbon 31 pre-fixing mechanism is used to set a pre-fixing structure on the solar cells 20 and / or the welding ribbon 31 to pre-fix the welding ribbon 31 on the solar cells 20.

[0157] In this embodiment, a feeding mechanism is provided for transporting the solar cells 20, enabling the feeding operation of the solar cells 20. When the incoming material is a whole solar cell 20a, a slitting mechanism can be used to first cut the whole solar cell 20a into half-cells 20b, and then perform a cell arrangement operation to form a battery string 10 using the slitting solar cells 20. This reduces the resistance loss of the module and improves the module efficiency. Simultaneously, a pre-storage platform is provided on one side of the slitting mechanism to pre-store any temporarily unused half-cells 20b, thereby ensuring the smoothness of the solar cell 20 splitting and arrangement cycle. Furthermore, the photovoltaic module manufacturing apparatus is also provided with a pre-fixing mechanism for the solder ribbon 31. The pre-fixing mechanism for the solder ribbon 31 can be used to process and form a pre-fixing structure on the cell 20 and / or the solder ribbon 31 in the cell array 101, so as to pre-fix the solder ribbon 31 laid on the cell 20 and avoid the solder ribbon 31 from shifting.

[0158] The pre-fixing mechanism for the solder ribbon 31 includes, but is not limited to, a dispensing device, a coating device, and an adhesive applicator. Any device that can pre-fix the solder ribbon 31 onto the battery cell 20 is acceptable and is not limited in this respect.

[0159] Optionally, the battery cell transfer mechanism includes a moving module, a rotating module, and a transfer component. The rotating module is connected to the moving module, and the transfer component is connected to the rotating module. The moving module is used to drive the rotating module and the transfer component to move linearly, and the rotating module is used to drive the transfer component to rotate.

[0160] In this embodiment, the transfer member can grasp the battery cell 20, and the moving module can drive the rotating module and the transfer member to move linearly, so that the transfer member can transfer the battery cell 20 in the feeding mechanism and arrange it on the working surface of the stringing platform. The rotating module can drive the transfer member to rotate, and the transfer member can drive the battery cell 20 to rotate, so as to adjust the orientation of the battery cell 20.

[0161] The transfer component can be set as a robotic arm, vacuum adsorption plate, clamping component, or other structural component capable of grasping the battery cell 20. It can be flexibly selected as needed and there are no restrictions on it.

[0162] Optionally, this application embodiment also provides a photovoltaic module, which is prepared by the preparation method described in the foregoing embodiments, or prepared by the photovoltaic module preparation apparatus described in the foregoing embodiments.

[0163] In this embodiment, a battery array 101 comprising 2n battery cells 20 is formed by a one-time arrangement of cells, and then a battery string comprising two parallel connected half-strings is prepared by a one-time laying of solder ribbons 31. The two half-strings are connected by solder ribbons 31 with a continuous structure. This not only simplifies the processing steps of the module and optimizes the production cycle, but also improves production efficiency. Moreover, when connecting the battery string 10 to the intermediate busbar 42, the intermediate busbar 42 only needs to be placed between the two half-strings of the battery string 10 to achieve the connection between the intermediate busbar 42 and the battery string 10, without needing to consider the alignment and connection of the solder ribbons 31 on both sides of the intermediate busbar 42 separately. This not only facilitates the string arrangement operation, but also ensures the consistency of the cell spacing of the entire battery string 10, and effectively solves the problem of misalignment of the battery strings 10 on both sides of the intermediate busbar 42 in the prior art.

[0164] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0165] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for preparing a photovoltaic module, characterized in that, include: Arrange 2n battery cells sequentially along the first direction to form a battery array, where n is a natural number greater than or equal to 2; Solder ribbons are laid on the battery array to connect the battery array to form a battery string through multiple solder ribbons; wherein, the solder ribbons located between two adjacent battery cells extend from the surface of one battery cell to the surface of another battery cell and are respectively connected to the two battery cells, and along the layout direction of the battery cells, the 1st to the nth battery cells are connected in series through the solder ribbons, the (n+1)th to the 2nth battery cells are connected in series through the solder ribbons, and the nth battery cell and the (n+1)th battery cell are connected in parallel through the solder ribbons.

2. The method for preparing a photovoltaic module according to claim 1, characterized in that, The preparation method further includes: The plurality of battery strings are arranged along a second direction, which intersects with the first direction; A photovoltaic module is formed by connecting multiple battery strings through a busbar; preferably, the busbar is located on the back of the battery strings.

3. The method for preparing a photovoltaic module according to claim 2, characterized in that, The battery string includes a first battery string and a second battery string, and arranging the plurality of battery strings along a second direction includes: At least one first battery string and at least one second battery string are arranged alternately at intervals along the second direction, wherein the first battery string and the second battery string are rotationally symmetrical.

4. The method for preparing a photovoltaic module according to claim 2, characterized in that, The surface of the battery cell is provided with two types of electrode components with opposite conductivity. The two types of electrode components with opposite conductivity are arranged alternately along the second direction. The solder strip is electrically connected to the electrode components. Along the second direction, the electrode components on two adjacent battery cells that are close to each other on one side have the same conductivity.

5. The method for preparing a photovoltaic module according to claim 2, characterized in that, In the plurality of battery strings, the solder strip layup structure in each battery string is identical; and / or, A pre-fixing structure is provided on the battery cell and / or solder ribbon to pre-fix the solder ribbon on the battery cell. The pre-fixing structure is the same in each battery string. The pre-fixing structure includes adhesive dot fixing or film coating fixing.

6. The method for preparing a photovoltaic module according to any one of claims 1-5, characterized in that, The battery cell includes a first battery cell and a second battery cell, the first battery cell and the second battery cell being cut from a whole battery cell, and the electrode patterns on the first battery cell and the electrode patterns on the second battery cell being rotationally symmetrical; the step of arranging 2n battery cells sequentially along a first direction to form a battery array includes: S1. The n first battery cells and n second battery cells are alternately arranged along the first direction to form the battery array; wherein, along the distribution direction of the battery cells, the first battery cells and the second battery cells that are sequentially adjacent come from the same whole battery cell.

7. The method for preparing a photovoltaic module according to claim 6, characterized in that, If n is an even number, along the arrangement direction of the battery cells, the first battery cell and the nth battery cell in each battery string come from the same whole battery cell; and / or, the (n+1)th battery cell and the 2nth battery cell come from the same whole battery cell.

8. The method for preparing a photovoltaic module according to claim 7, characterized in that, Step S1 includes: S11. Provide n / 2 whole battery cells, cut them into n / 2 first battery cells and n / 2 second battery cells, and arrange the cut first battery cells and second battery cells alternately along the first direction to form a first battery array; S12. Provide one whole battery cell, cut it to form the first battery cell and the second battery cell, arrange the second battery cell at the tail end of the first battery array, and pre-store the remaining first battery cell; S13. Provide n / 2-1 whole battery cells, cut them into n / 2-1 first battery cells and n / 2-1 second battery cells, and arrange the cut first battery cells and second battery cells alternately after the second battery cells in step S12 along the distribution direction of the battery cells; S14. Arrange the first battery cells pre-stored in step S12 at the tail end of the first battery array obtained in step S13 to form the battery array.

9. The method for preparing a photovoltaic module according to claim 8, characterized in that, The battery string obtained from the battery array in step S14 is designated as the first battery string, and the preparation method further includes: Multiple first battery strings are prepared, and a portion of the first battery strings are rotated 180° to obtain second battery strings; The first battery string and the second battery string are arranged alternately along a second direction, which intersects with the first direction; The first and second battery strings are connected by a busbar to form a photovoltaic module.

10. The method for preparing a photovoltaic module according to claim 7, characterized in that, Step S1 includes: S21. Provide one whole battery cell, cut it into a first battery cell and a second battery cell, and use the second battery cell as the first battery cell of the battery array, and pre-store the remaining first battery cells; S22. Provide n / 2-1 whole battery cells, cut them into n / 2-1 first battery cells and n / 2-1 second battery cells, and arrange the cut first battery cells and second battery cells alternately behind the first battery cell along the first direction to form a second battery array, and arrange the first battery cells pre-stored in step S21 at the tail end of the second battery array. S23. Provide n / 2 of the whole battery cells, cut them into n / 2 first battery cells and n / 2 second battery cells, and arrange the cut first battery cells and second battery cells alternately after the pre-stored first battery cells along the distribution direction of the battery cells to form the battery array.

11. The method for preparing a photovoltaic module according to claim 10, characterized in that, The battery string obtained from the battery array in step S23 is designated as the second battery string, and the preparation method further includes: Multiple second battery strings are prepared, and a portion of the second battery strings are rotated 180° to obtain a first battery string; The first battery string and the second battery string are arranged alternately along a second direction, which intersects with the first direction; The first and second battery strings are connected by a busbar to form a photovoltaic module.

12. The method for preparing a photovoltaic module according to claim 6, characterized in that, If n is odd, step S1 includes: S31. Provide one whole battery cell, cut it into a first battery cell and a second battery cell, and use the second battery cell as the first battery cell of the battery array, and pre-store the remaining first battery cells; S32. Provide (n-1) / 2 whole battery cells, cut them to form (n-1) / 2 first battery cells and (n-1) / 2 second battery cells, and arrange the cut first battery cells and second battery cells alternately behind the first battery cell along the first direction to form a first battery array; S33. Provide one whole battery cell, cut it to form the first battery cell and the second battery cell, arrange the second battery cell at the tail end of the first battery array, and pre-store the remaining first battery cell; S34. Provide (n-1) / 2 whole battery cells, cut them to form (n-1) / 2 first battery cells and (n-1) / 2 second battery cells, and arrange the cut first battery cells and second battery cells alternately behind the second battery cells in step S33 along the distribution direction of the battery cells to form the battery array.

13. The method for preparing a photovoltaic module according to claim 12, characterized in that, After step S34, the preparation method further includes: S41. Provide (n-1) / 2 whole battery cells, cut them to form (n-1) / 2 first battery cells and (n-1) / 2 second battery cells, and arrange the cut first battery cells and second battery cells alternately along the first direction to form a second battery array; S42. Arrange one of the first battery cells pre-stored in step S31 or step S33 at the tail end of the second battery array. S43. Provide (n-1) / 2 whole battery cells, cut them into (n-1) / 2 first battery cells and (n-1) / 2 second battery cells, and arrange the cut first battery cells and second battery cells alternately behind the second battery array along the distribution direction of the battery cells; S44. Arrange the other first battery cell pre-stored in step S31 or step S33 at the tail end of the second battery array obtained in step S43 to form the battery array.

14. The method for preparing a photovoltaic module according to claim 12, characterized in that, The battery string includes a first battery string and a second battery string, and the preparation method further includes: The first battery string and the second battery string are arranged alternately along a second direction, which intersects with the first direction; wherein, the first battery string is prepared by the battery array in step S34, the second battery string is prepared by the battery array in step S44, and / or, the second battery string is obtained by rotating the first battery string by 180°; The first and second battery strings are connected by a busbar to form a photovoltaic module.

15. The method for preparing a photovoltaic module according to claim 6, characterized in that, If n is odd, step S1 includes: S51. Provide (n-1) / 2 whole battery cells, cut them to form (n-1) / 2 first battery cells and (n-1) / 2 second battery cells, and arrange the cut first battery cells and second battery cells alternately along the first direction to form a second battery array; S52. Provide one whole battery cell, cut it to form a first battery cell and a second battery cell, arrange the first battery cell at the tail end of the second battery array, and pre-store the remaining second battery cell; S53. Provide (n-1) / 2 whole battery cells, cut them to form (n-1) / 2 first battery cells and (n-1) / 2 second battery cells, and arrange the cut first battery cells and second battery cells alternately behind the second battery array obtained in step S52 along the distribution direction of the battery cells; S54. Provide one whole battery cell, cut it to form the first battery cell and the second battery cell, arrange the first battery cell at the tail of the second battery array obtained in step S53 to form the battery array, and pre-store the remaining second battery cells.

16. The method for preparing a photovoltaic module according to claim 15, characterized in that, After step S54, the preparation method further includes: S61. Use the second battery cell pre-stored in step S51 or step S53 as the first battery cell of the battery array. S62. Provide (n-1) / 2 whole battery cells, cut them to form (n-1) / 2 first battery cells and (n-1) / 2 second battery cells, and arrange the cut first battery cells and second battery cells alternately behind the first battery cell along the first direction to form a first battery array; S63. Arrange another second battery cell pre-stored in step S51 or step S53 at the tail end of the first battery array. S64. Provide (n-1) / 2 whole battery cells, cut them to form (n-1) / 2 first battery cells and (n-1) / 2 second battery cells, and arrange the cut first battery cells and second battery cells alternately behind the first battery array obtained in step S63 along the distribution direction of the battery cells to form the battery array.

17. The method for preparing a photovoltaic module according to claim 16, characterized in that, The battery string includes a first battery string and a second battery string, and the preparation method further includes: At least one first battery string and at least one second battery string are alternately arranged along a second direction, which intersects with the first direction. The first battery string and the second battery string are connected by a busbar to form a photovoltaic module. The second battery string is prepared by the battery array in step S54, the first battery string is prepared by the battery array in step S64, and / or the first battery string is obtained by rotating the second battery string by 180°.

18. The method for preparing a photovoltaic module according to any one of claims 1-5, characterized in that, The battery cell includes a first battery cell and a second battery cell, which are obtained by cutting a whole battery cell. The electrode pattern on the first battery cell is axially symmetrical to the electrode pattern on the second battery cell. The step of arranging 2n battery cells sequentially along a first direction to form a battery array includes: M1. The battery array is formed by alternately arranging n first battery cells and n second battery cells along the first direction.

19. The method for preparing a photovoltaic module according to claim 18, characterized in that, If n is even, step M1 includes: M11. Provide n / 2 whole battery cells, cut them into n / 2 first battery cells and n / 2 second battery cells, and arrange the cut first battery cells and second battery cells alternately along the first direction to form a first battery array; M12. Provide n / 2 whole battery cells, cut them to form n / 2 first battery cells and n / 2 second battery cells, and arrange the cut second battery cells and first battery cells alternately behind the first battery array along the first direction to form the battery array; wherein, all second battery cells are rotated 180°.

20. The method for preparing a photovoltaic module according to claim 18, characterized in that, Let n be an even number, and step M1 includes: M21. Provide n / 2 whole battery cells, cut them into n / 2 first battery cells and n / 2 second battery cells, and arrange the cut second battery cells and first battery cells alternately along the first direction to form a second battery array; M22. Provide n / 2 of the whole battery cells, cut them to form n / 2 first battery cells and n / 2 second battery cells, and arrange the cut first battery cells and second battery cells alternately in sequence along the first direction behind the second battery array to form the battery array; wherein, all the second battery cells are rotated 180°.

21. The method for preparing a photovoltaic module according to claim 18, characterized in that, Let n be an even number, and step M1 includes: M31. Provide n whole battery cells, cut them into n first battery cells and n second battery cells, arrange the cut first battery cells and second battery cells alternately along the first direction; rotate the even-numbered second battery cells from the 1st to the nth battery cells by 180°, and rotate the odd-numbered first battery cells from the (n+1)th to the 2nth battery cells by 180° to form the battery array.

22. The method for preparing a photovoltaic module according to claim 18, characterized in that, Let n be an even number, and step M1 includes: M41. Provide n whole battery cells, cut them into n first battery cells and n second battery cells, arrange the cut second battery cells and first battery cells alternately along the first direction; rotate the odd-numbered second battery cells from the 1st to the nth battery cells by 180°, and rotate the even-numbered first battery cells from the n+1th to the 2nth battery cells by 180° to form the battery array.

23. The method for preparing a photovoltaic module according to claim 18, characterized in that, If n is odd, step M1 includes: M51, n+1 first battery cells and n-1 second battery cells are obtained by cutting the whole battery cell; (n+1) / 2 of the first battery cells and (n-1) / 2 of the second battery cells are arranged alternately along the first direction to form a first battery array; M52. The remaining (n+1) / 2 first battery cells and (n-1) / 2 second battery cells are alternately arranged behind the first battery array along the first direction to form the battery array; wherein, all the second battery cells are rotated 180°.

24. The method for preparing a photovoltaic module according to claim 18, characterized in that, If n is odd, step M1 includes: M61. The whole battery cell is cut to obtain n+1 second battery cells and n-1 first battery cells; (n+1) / 2 of the second battery cells and (n-1) / 2 of the first battery cells are arranged alternately along the first direction to form a second battery array; M62. Arrange the remaining (n+1) / 2 second battery cells and (n-1) / 2 first battery cells behind the second battery array to form the battery array; wherein, all the second battery cells are rotated 180°.

25. The method for preparing a photovoltaic module according to claim 18, characterized in that, If n is odd, step M1 includes: M71. The entire battery cell is cut into n first battery cells and n second battery cells. The first battery cells and the second battery cells are arranged alternately along the first direction. The even-numbered second battery cells in the first to nth battery cells are rotated by 180°, and the even-numbered first battery cells in the (n+1)th to 2nth battery cells are rotated by 180° to form the battery array.

26. The method for preparing a photovoltaic module according to claim 18, characterized in that, If n is odd, step M1 includes: M81. The entire battery cell is cut into n first battery cells and n second battery cells. The second battery cells and the first battery cells are arranged alternately along the first direction. The odd-numbered second battery cells in the first to nth battery cells are rotated by 180°, and the odd-numbered first battery cells in the (n+1)th to 2nth battery cells are rotated by 180° to form the battery array.

27. The method for preparing a photovoltaic module according to any one of claims 18-26, characterized in that, The battery cell has a right-angled edge and a chamfered edge arranged opposite each other along the first direction. In two adjacent battery cells in the first direction, the edge of one battery cell with the right-angled edge at least partially overlaps the edge of the other battery cell with the chamfered edge, and the chamfered edge is located on the side of the right-angled edge facing the light-receiving surface of the battery string.

28. The method for preparing a photovoltaic module according to any one of claims 1-5, characterized in that, The battery cell is a half-cell battery cell, and n is set to an even number. The step of arranging 2n battery cells sequentially along the first direction to form a battery array includes: F11. Arrange the 2n half-cell batteries sequentially along the first direction; F12. Along the first direction, rotate the even-numbered half-cells of the first to nth cell array by 180°, and rotate the odd-numbered half-cells of the (n+1)th to 2nth cell array by 180° to form the battery array; or, F13. Along the first direction, rotate the odd-numbered half-cells of the first to nth cell by 180°, and rotate the even-numbered half-cells of the (n+1)th to 2nth cell by 180° to form the battery array.

29. The method for preparing a photovoltaic module according to claim 28, characterized in that, The battery string includes a first battery string and a second battery string, and the preparation method further includes: The first battery string and the second battery string are arranged alternately along a second direction, which intersects with the first direction; wherein, the first battery string is prepared by the battery array in step F12, the second battery string is prepared by the battery array in step F13, or, the second battery string is obtained by rotating the first battery string by 180°, or, the first battery string is obtained by rotating the second battery string by 180°. The first and second battery strings are connected by a busbar to form a photovoltaic module.

30. The method for preparing a photovoltaic module according to any one of claims 1-5, characterized in that, The battery cell is a half-cell battery cell, and n is set to an odd number. The step of arranging 2n battery cells sequentially along the first direction to form a battery array includes: F21. Arrange the 2n half-cell batteries sequentially along the first direction; F22. Along the first direction, rotate the odd-numbered half-cells of the first to nth cell groups by 180°, and rotate the odd-numbered half-cells of the (n+1)th to 2nth cell groups by 180° to form the battery array; or, F23. Along the first direction, rotate the even-numbered half-cells of the first to nth cell by 180°, and rotate the even-numbered half-cells of the (n+1)th to 2nth cell by 180° to form the battery array.

31. The method for preparing a photovoltaic module according to claim 30, characterized in that, The battery string includes a first battery string and a second battery string, and the preparation method further includes: The first battery string and the second battery string are arranged alternately along a second direction, which intersects with the first direction; wherein, the first battery string is prepared by the battery array in step F22, and the second battery string is prepared by the battery array in step F23; or, the second battery string is obtained by rotating the first battery string by 180°, or, the first battery string is obtained by rotating the second battery string by 180°. The first and second battery strings are connected by a busbar to form a photovoltaic module.

32. A photovoltaic module fabrication apparatus for performing the fabrication method according to any one of claims 1-31, characterized in that, include: The stringing platform is equipped with a working surface for placing the battery cells. A battery cell transfer mechanism is disposed opposite to the stringing platform and is used to transfer the battery cells and arrange the battery cells on the working surface along a first direction; A ribbon laying mechanism is disposed opposite to the stringing platform and is used to cut and lay the ribbon on the battery array.

33. The photovoltaic module manufacturing apparatus according to claim 32, characterized in that, Also includes: The feeding mechanism is used to transport the entire battery cell. The slicing mechanism is located at the downward station of the feeding mechanism and is used to cut the whole battery cell. A pre-storage platform is located on one side of the slicing mechanism and is used to place the battery cells to be pre-stored. A ribbon pre-fixing mechanism is used to provide a pre-fixing structure on the battery cell and / or ribbon to pre-fix the ribbon on the battery cell.

34. The photovoltaic module manufacturing apparatus according to claim 32, characterized in that, The battery cell transfer mechanism includes a moving module, a rotating module, and a transfer component. The rotating module is connected to the moving module, and the transfer component is connected to the rotating module. The moving module is used to drive the rotating module and the transfer component to move linearly, and the rotating module is used to drive the transfer component to rotate.

35. A photovoltaic module, characterized in that, The photovoltaic module is prepared by the preparation method according to any one of claims 1-31, or by the photovoltaic module preparation apparatus according to any one of claims 32-34.

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