BC battery string piece arranging method and piece arranging device

Abstract

The invention discloses a BC battery string sheet arranging method and device, and the method comprises the steps: continuously conveying first battery sheets, forming a plurality of groups of battery packs which are formed by arranging 2n first battery sheets in an array manner, and carrying out the array arrangement of 2n second battery sheets in the array direction, n first battery pieces at odd positions in the ith battery piece group are rotated by 180 degrees to form n second battery pieces, and n first battery pieces at even positions in the (i + 1) th battery piece group are rotated by 180 degrees to form n second battery pieces; or, the n first battery pieces at the even positions in the ith battery piece group are rotated by 180 degrees to form the n second battery pieces, and the n first battery pieces at the odd positions in the (i + 1) th battery piece group are rotated by 180 degrees to form the n second battery pieces. According to the scheme, the problem of continuous production of two different types of BC battery strings used for photovoltaic module typesetting can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of BC battery strings, and in particular to a method for arranging BC battery strings and a device for arranging wafers. Background Art

[0002] Due to the structure without grid lines on the light-facing side of the BC battery string (back-contact battery string), sunlight can be fully utilized, resulting in higher efficiency. When preparing a photovoltaic module using a BC battery string composed of half-cell wafers with an even number of grid lines and an even number of wafers, during the flush layout process, it is found that the solder tape of some BC battery strings cannot be welded near the bending area of the bent bus bar. If some BC battery strings are translated to avoid it, the overall aesthetics of the photovoltaic module will be poor.

[0003] In the related art, since two different types of half-cell wafers are obtained after wafer scribing, based on the same solder tape group layout, by adjusting the layout of multiple wafers (as shown in Figure 1 ), two different string types of BC battery strings can be obtained. Using these two BC battery strings to layout the photovoltaic module can solve the problem of avoiding the bending area of the bent bus bar. In order to realize the continuous production of BC battery strings and photovoltaic modules, there is an urgent need for a wafer arrangement method to realize the cyclic production of two different string types of BC battery strings. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for arranging BC battery strings to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: On the one hand, the present application provides a method for arranging BC battery strings, including: Continuously conveying the first wafers and forming multiple groups of wafer groups arranged in an array of 2n of the first wafers, In the array direction, n of the first wafers at odd positions in the i-th wafer group are rotated 180° to form n second wafers, and n of the first wafers at even positions in the (i + 1)-th wafer group are rotated 180° to form n second wafers; Or, n of the first wafers at even positions in the i-th wafer group are rotated 180° to form n second wafers, and n of the first wafers at odd positions in the (i + 1)-th wafer group are rotated 180° to form n second wafers; Wherein, the value range of i is the set of positive odd numbers, n > 1, n is an integer, the number of grid lines of the first wafer and the number of grid lines of the second wafer are both even, and the grid line layout after the first wafer is rotated 180° is the same as the grid line layout of the second wafer.

[0006] Preferably, in the step of continuously conveying the first battery wafers and forming multiple groups of battery packs arranged in an array of 2n first battery wafers, it includes: Taking a first battery wafers arranged in an array as a group and conveying them in sequence c times, with the last time conveying (2n - ca) first battery wafers as a group, and cycling in this way to form multiple groups of the battery wafer groups, where a ≥ 1, c ≥ 1, ca ≤ 2n, and c and a are integers.

[0007] Preferably, in the step of rotating 180° n first battery wafers at odd positions in the i-th group of the battery wafer groups along the array direction to form n second battery wafers, and rotating 180° n first battery wafers at even positions in the (i + 1)-th group of the battery wafer groups to form n second battery wafers, it includes: Along the array direction, while 2n first battery wafers continuously move to the wafer layout station for array arrangement, the s-th first battery wafer rotates 180° to form the second battery wafer, and then moves to the wafer layout station to form the i-th group of the battery wafer groups, or, 2n first battery wafers continuously move to the wafer layout station to form the i-th group of the battery wafer groups, and rotate 180° n first battery wafers at odd positions in the i-th group of the battery wafer groups to form n second battery wafers; Along the array direction, while 2n first battery wafers continuously move to the wafer layout station for array arrangement, the t-th first battery wafer rotates 180° to form the second battery wafer, and then moves to the wafer layout station to form the (i + 1)-th group of the battery wafer groups, or, 2n first battery wafers continuously move to the wafer layout station to form the (i + 1)-th group of the battery wafer groups, and rotate 180° n first battery wafers at even positions in the (i + 1)-th group of the battery wafer groups to form n second battery wafers, where the value range of s is the set of positive odd numbers in 0 to 2n, and the value range of t is the set of positive even numbers in 0 to 2n.

[0008] Preferably, in the step of rotating 180° n first battery wafers at even positions in the i-th group of the battery wafer groups to form n second battery wafers, and rotating 180° n first battery wafers at odd positions in the (i + 1)-th group of the battery wafer groups to form n second battery wafers, it includes: Along the array direction, while 2n first battery wafers continuously move to the wafer layout station for array arrangement, the t-th first battery wafer rotates 180° to form the second battery wafer, and then moves to the wafer layout station to form the i-th group of the battery wafer groups, or, 2n first battery wafers continuously move to the wafer layout station to form the i-th group of the battery wafer groups, and rotate 180° n first battery wafers at even positions in the i-th group of the battery wafer groups to form n second battery wafers; Along the array direction, while 2n of the first battery cells continuously move to the cloth sheet station for array arrangement, the s-th first battery cell rotates 180° to form the second battery cell, and then moves to the cloth sheet station to form the (i + 1)-th group of battery cell groups. Or, 2n of the first battery cells continuously move to the cloth sheet station to form the (i + 1)-th group of battery cell groups, and n of the first battery cells at odd positions in the (i + 1)-th group of battery cell groups rotate 180° to form n second battery cells. Wherein, the value range of s is the set of positive odd numbers from 0 to 2n, and the value range of t is the set of positive even numbers from 0 to 2n.

[0009] On the other hand, the present application also provides a cloth sheet device for implementing the above BC battery string sheet arrangement method, including: A feeding mechanism for continuously conveying the first battery cells; A wafer carrier mechanism for successively carrying the i-th group of battery cell groups and the (i + 1)-th group of battery cell groups. The i-th group of battery cell groups or the (i + 1)-th group of battery cell groups are formed by n first battery cells and n second battery cells arranged alternately and conveyed by the feeding mechanism. A sheet arrangement mechanism for rotating 180° n first battery cells at odd positions in the i-th group of battery cell groups to form n second battery cells, rotating 180° n first battery cells at even positions in the (i + 1)-th group of battery cell groups to form n second battery cells, or rotating 180° n first battery cells at even positions in the i-th group of battery cell groups to form n second battery cells, and rotating 180° n first battery cells at odd positions in the (i + 1)-th group of battery cell groups to form n second battery cells.

[0010] Preferably, the sheet arrangement mechanism includes a lifting driving member and a rotating hand, and the rotating hand is arranged at the driving end of the lifting driving member.

[0011] Preferably, the wafer carrier mechanism includes a wafer carrier table, a first telescopic driving member, a second telescopic driving member, and a plurality of rotating suction cups. The first telescopic driving member and the second telescopic driving member are both arranged on the wafer carrier table. A part of the plurality of rotating suction cups is connected to the telescopic end of the first telescopic driving member, and another part of the plurality of rotating suction cups is connected to the telescopic end of the second telescopic driving member. A part of the plurality of rotating suction cups and another part of the plurality of rotating suction cups are arranged alternately along the array direction.

[0012] Preferably, the feeding mechanism includes a first feeding table, which can carry a plurality of the first battery cells arranged in an array, and the first feeding table can transport a plurality of the first battery cells to the wafer carrier mechanism.

[0013] Preferably, the loading mechanism includes a first loading table and a second loading table. Both the first loading table and the second loading table can carry s first battery wafers arranged in an array. The first loading table and the second loading table can cyclically transport s first battery wafers to the wafer loading mechanism, where 0 < s < n and s is an integer.

[0014] The technical solution adopted in this application can achieve the following beneficial effects: In a BC battery string arranging method disclosed in this application, it includes: continuously conveying first battery wafers and forming multiple groups of battery groups each composed of 2n first battery wafers arranged in an array.

[0015] In the array direction, n first battery wafers at odd positions in the i-th group of battery wafers are rotated 180° to form n second battery wafers, and n first battery wafers at even positions in the (i + 1)-th group of battery wafers are rotated 180° to form n second battery wafers; or, n first battery wafers at even positions in the i-th group of battery wafers are rotated 180° to form n second battery wafers, and n first battery wafers at odd positions in the (i + 1)-th group of battery wafers are rotated 180° to form n second battery wafers; where the value range of i is the set of positive odd numbers, n > 1 and n is an integer. Both the first battery wafers and the second battery wafers are even-grid battery wafers, and the grid arrangement after the first battery wafers are rotated 180° is the same as the grid arrangement of the second battery wafers.

[0016] In this step, by rotating n first battery wafers in each of the i-th group of battery wafers and the (i + 1)-th group of battery wafers respectively, it should be noted that when the i-th group of battery wafers rotates n first battery wafers at odd positions therein, the (i + 1)-th group of battery wafers rotates n first battery wafers at even positions therein, and vice versa. Thus, when only the first battery wafers are loaded, two different wafer arranging methods can be cyclically and alternately realized.

[0017] It should be noted that both the first battery wafers and the second battery wafers are even-grid battery wafers, and the grid arrangement after the first battery wafers are rotated 180° is the same as the grid arrangement of the second battery wafers. The sum of the number of first battery wafers and the number of second battery wafers in the i-th group of battery wafers is even. Similarly, the sum of the number of first battery wafers and the number of second battery wafers in the (i + 1)-th group of battery wafers is also even.

[0018] In the above method, n first battery wafers are rotated to form second battery wafers. In the arrangement direction, n first battery wafers and n second battery wafers are arranged alternately, thereby realizing the presentation of two different wafer arranging structures, and ensuring the continuous production of BC battery strings and photovoltaic modules. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on the provided drawings.

[0020] Figure 1 It is a schematic layout diagram of two different BC cell string types in the related art. Figure 2 It is a schematic step diagram of the first layout method in the BC cell string layout method disclosed in the embodiments of the present application. Figure 3 It is a schematic step diagram of the second layout method in the BC cell string layout method disclosed in the embodiments of the present application. Figure 4 It is a schematic step diagram of the third layout method in the BC cell string layout method disclosed in the embodiments of the present application. Figure 5 It is a schematic step diagram of the fourth layout method in the BC cell string layout method disclosed in the embodiments of the present application. Figure 6 It is a structural schematic diagram of the layout device disclosed in the embodiments of the present application.

[0021] In the figure: 100, feeding mechanism; 110, first feeding table; 120, second feeding table; 200, wafer carrying mechanism; 300, wafer layout mechanism. Detailed implementation manners

[0022] To facilitate the understanding of the present invention, the following will describe the present invention more comprehensively with reference to the relevant accompanying drawings. The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0025] In the overall automated process of photovoltaic modules, while ensuring the current maximum conversion efficiency, the layout process realizes circuit connection by arranging two different even-numbered cell strings. The busbar arrangements of the two different cell strings are the same, but the ways of arranging the cells are different. If one of the two different cell arrangement methods is produced at intervals, it will lead to problems of discontinuity and waiting in subsequent processes. Instead, by alternately circulating two different cell arrangement patterns in the string-making process to prepare two types of cell strings, it is beneficial for the subsequent layout machine to continuously perform layout, thereby ensuring the efficiency of automation. As Figures 2 to 5 shown, this application discloses a method for arranging BC cell strings. The disclosed method for arranging BC cell strings includes: S1. Continuously convey the first type of cells and form multiple groups of cell groups arranged in an array of 2n first type of cells.

[0026] S2. Along the array direction, n first type of cells at odd positions in the i-th group of cell groups are rotated 180° to form n second type of cells, and n first type of cells at even positions in the (i + 1)-th group of cell groups are rotated 180° to form n second type of cells; or, n first type of cells at even positions in the i-th group of cell groups are rotated 180° to form n second type of cells, and n first type of cells at odd positions in the (i + 1)-th group of cell groups are rotated 180° to form n second type of cells; where i takes values from the set of positive odd numbers, n > 1, n is an integer, both the first type of cells and the second type of cells are even-grid cells, and the busbar arrangement after the first type of cells are rotated 180° is the same as the busbar arrangement of the second type of cells.

[0027] In this step, by rotating n first type of cells in the i-th group of cell groups and the (i + 1)-th group of cell groups respectively, it should be noted that when the i-th group of cell groups rotates n first type of cells at odd positions, the (i + 1)-th group of cell groups rotates n first type of cells at even positions, and vice versa. Thus, when only the first type of cells are fed, two different cell string arrangement methods can be cyclically alternated.

[0028] It should be noted that both the first type of cells and the second type of cells are even-grid cells, the busbar arrangement after the first type of cells are rotated 180° is the same as the busbar arrangement of the second type of cells, the sum of the number of the first type of cells and the number of the second type of cells in the i-th group of cell groups is even, and similarly, the sum of the number of the first type of cells and the number of the second type of cells in the (i + 1)-th group of cell groups is also even.

[0029] In the above method, by rotating n first type of cells to form second type of cells, along the arrangement direction, n first type of cells and n second type of cells are arranged alternately, thereby presenting two different cell arrangement structures, and ensuring the continuous production of BC cell strings and photovoltaic modules.

[0030] In the embodiments of the present application, in the step of continuously conveying the first battery wafers and forming multiple groups of battery packs arranged in an array of 2n first battery wafers, it may include: S11. Taking a first battery wafers arranged in an array as a group and conveying them in sequence c times, and finally taking (2n - ca) first battery wafers as a group for the last conveyance, and forming multiple groups of battery wafer groups in this cycle, where a ≥ 1, ca ≤ 2n, and a is an integer.

[0031] In this step, the first battery wafers are conveyed and arranged in groups of at least one first battery wafer. The closer a is to 2n, the higher the conveying efficiency of the first battery wafers.

[0032] In an alternative solution, in the step of rotating 180° n first battery wafers at odd positions in the i-th group of battery wafer groups and rotating 180° n first battery wafers at even positions in the (i + 1)-th group of battery wafer groups along the array direction, it may include: S21. Along the array direction, while 2n first battery wafers continuously move to the wafer placement station for array arrangement, the s-th first battery wafer rotates 180° to form a second battery wafer, and then moves to the wafer placement station to form the i-th group of battery wafer groups, or, 2n first battery wafers continuously move to the wafer placement station to form the i-th group of battery wafer groups, and rotate 180° n first battery wafers at odd positions in the i-th group of battery wafer groups to form n second battery wafers.

[0033] In this step, for realizing the i-th group of battery wafer groups, two different wafer placement steps are further proposed. Specifically, during the continuous conveyance of 2n first battery wafers, rotate 180° each of the first battery wafers with odd numbers one by one, and finally form the i-th group of battery wafer groups in a wafer placement manner at the wafer placement station, or, after 2n first battery wafers are conveyed to the wafer placement station, uniformly rotate 180° n first battery wafers at odd positions.

[0034] S22. Along the array direction, while 2n first battery wafers continuously move to the wafer placement station for array arrangement, the t-th first battery wafer rotates 180° to form a second battery wafer, and then moves to the wafer placement station to form the (i + 1)-th group of battery wafer groups, or, 2n first battery wafers continuously move to the wafer placement station to form the (i + 1)-th group of battery wafer groups, and rotate 180° n first battery wafers at even positions in the (i + 1)-th group of battery wafer groups to form n second battery wafers, where the value range of s is the set of positive odd numbers in 0 to 2n, and the value range of t is the set of positive even numbers in 0 to 2n.

[0035] In this step, two different chip placement steps are further proposed for the (i + 1)-th group of cell groups. Different from the above steps, in this step, the even-numbered first cells are rotated 180° one by one, and finally, the (i + 1)-th group of cell groups in a chip placement manner is formed at the chip placement station. Or, after 2n first cells are conveyed to the chip placement station, the n first cells at even positions are uniformly rotated 180°.

[0036] In another alternative solution, in the step of rotating the n first cells at even positions in the i-th group of cell groups by 180° to form n second cells and rotating the n first cells at odd positions in the (i + 1)-th group of cell groups by 180° to form n second cells, it may include: S23. Along the array direction, while 2n first cells continuously move to be arrayed at the chip placement station, the t-th first cell is rotated 180° to form a second cell, and then moves to the chip placement station to form the i-th group of cell groups. Or, 2n first cells continuously move to the chip placement station to form the i-th group of cell groups, and the n first cells at even positions in the i-th group of cell groups are rotated 180° to form n second cells.

[0037] In this step, for realizing the i-th group of cell groups, two different chip placement steps are further proposed. Specifically, during the continuous conveyance of 2n first cells, the even-numbered first cells are rotated 180° one by one, and finally, the i-th group of cell groups in a chip placement manner is formed at the chip placement station. Or, after 2n first cells are conveyed to the chip placement station, the n first cells at even positions are uniformly rotated 180°.

[0038] S24. Along the array direction, while 2n first cells continuously move to be arrayed at the chip placement station, the s-th first cell is rotated 180° to form a second cell, and then moves to the chip placement station to form the (i + 1)-th group of cell groups. Or, 2n first cells continuously move to the chip placement station to form the (i + 1)-th group of cell groups, and the n first cells at odd positions in the (i + 1)-th group of cell groups are rotated 180° to form n second cells, where the value range of s is the set of positive odd numbers from 0 to 2n, and the value range of t is the set of positive even numbers from 0 to 2n.

[0039] In this step, two different chip placement steps are further proposed for the (i + 1)-th group of cell groups. Different from the above steps, in this step, the odd-numbered first cells are rotated 180° one by one, and finally, the (i + 1)-th group of cell groups in a chip placement manner is formed at the chip placement station. Or, after 2n first cells are conveyed to the chip placement station, the n first cells at odd positions are uniformly rotated 180°.

[0040] As shown in Figure 6 the figure, the present application also discloses a sheet arranging device for implementing the above BC cell string arranging method. The disclosed sheet arranging device includes a feeding mechanism 100 for continuously conveying the first battery cells; a sheet carrying mechanism 200 for successively carrying the i-th group of battery cell groups and the (i + 1)-th group of battery cell groups, where the i-th group of battery cell groups or the (i + 1)-th group of battery cell groups are formed by n first battery cells and n second battery cells arranged alternately and conveyed by the feeding mechanism 100; and a sheet arranging mechanism 300 for rotating 180° the n first battery cells at odd positions in the i-th group of battery cell groups to form n second battery cells, and rotating 180° the n first battery cells at even positions in the (i + 1)-th group of battery cell groups to form n second battery cells, or rotating 180° the n first battery cells at even positions in the i-th group of battery cell groups to form n second battery cells, and rotating 180° the n first battery cells at odd positions in the (i + 1)-th group of battery cell groups to form n second battery cells.

[0041] During the use of the sheet arranging device, the feeding mechanism 100 continuously conveys the first battery cells to the sheet carrying mechanism 200, and the sheet arranging mechanism 300 rotates 180° the n first battery cells at odd positions in the i-th group of battery cell groups to form n second battery cells, and rotates 180° the n first battery cells at even positions in the (i + 1)-th group of battery cell groups to form n second battery cells, or rotates 180° the n first battery cells at even positions in the i-th group of battery cell groups to form n second battery cells, and rotates 180° the n first battery cells at odd positions in the (i + 1)-th group of battery cell groups to form n second battery cells, so that multiple groups of battery cell groups can be alternately and circularly arranged on the sheet carrying mechanism 200.

[0042] In the embodiment of the present application, the sheet arranging mechanism 300 may include a lifting driving member and a rotating hand. Specifically, the rotating hand is provided at the driving end of the lifting driving member, and the lifting driving member can drive the rotating hand to move up and down. The rotating hand can simultaneously grasp the n first battery cells at odd positions among the continuously conveyed 2n first battery cells and rotate them 180°, or grasp one by one the n first battery cells at odd positions among the continuously conveyed 2n first battery cells and rotate them 180°.

[0043] During the use of the sheet arranging device, the lifting driving member drives the rotating hand to move up and down. The rotating hand can simultaneously grasp the n first battery cells at odd positions among the continuously conveyed 2n first battery cells and rotate them 180°, or grasp one by one the n first battery cells at odd positions among the continuously conveyed 2n first battery cells and rotate them 180°. Among them, the rotating hand can perform a sheet grasping operation on the feeding mechanism 100, and the rotating hand can also perform a sheet grasping operation on the sheet carrying mechanism 200. The present application does not impose any restrictions on this.

[0044] In addition, the lifting drive member is a cylinder, an electric cylinder, a motor, a screw rod combination, etc., and the present application does not impose any restrictions on this.

[0045] In the embodiment of the present application, the wafer carrier mechanism 200 may include a wafer carrier table, a first telescopic drive member, a second telescopic drive member, and a plurality of rotating suction cups. Specifically, the first telescopic drive member and the second telescopic drive member are both provided on the wafer carrier table. A part of the plurality of rotating suction cups is connected to the telescopic end of the first telescopic drive member, and another part of the plurality of rotating suction cups is connected to the telescopic end of the second telescopic drive member. A part of the plurality of rotating suction cups and another part of the plurality of rotating suction cups are arranged in a staggered manner along the array direction.

[0046] In an alternative solution, the loading mechanism 100 may include a first loading table 110. Specifically, the first loading table 110 can carry a plurality of first battery cells arranged in an array, and the first loading table 110 can transport the plurality of first battery cells to the wafer carrier mechanism 200. The structure is simple and convenient for installation.

[0047] In another alternative solution, the loading mechanism 100 may include a first loading table 110 and a second loading table 120. Specifically, both the first loading table 110 and the second loading table 120 can carry s first battery cells arranged in an array, and the first loading table 110 and the second loading table 120 can cyclically transport the s first battery cells to the wafer carrier mechanism 200, where 0 < s < n and s is an integer.

[0048] In the above structure, the first loading table 110 and the second loading table 120 cyclically transport the s first battery cells to the wafer carrier mechanism 200, thereby improving the wafer transfer efficiency.

[0049] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for arranging BC battery strings, characterized in that, Including: Continuously conveying the first battery wafers and forming multiple groups of battery wafer groups each composed of 2n of the first battery wafers arranged in an array, In the array direction, n of the first battery wafers at odd positions in the i-th group of the battery wafer groups are rotated 180° to form n second battery wafers, and n of the first battery wafers at even positions in the (i + 1)-th group of the battery wafer groups are rotated 180° to form n second battery wafers; Or, n of the first battery wafers at even positions in the i-th group of the battery wafer groups are rotated 180° to form n second battery wafers, and n of the first battery wafers at odd positions in the (i + 1)-th group of the battery wafer groups are rotated 180° to form n second battery wafers; Wherein, the value range of i is the set of positive odd numbers, n > 1, n is an integer, the number of grid lines of the first battery wafer and the number of grid lines of the second battery wafer are both even, and the grid line arrangement of the first battery wafer after being rotated 180° is the same as the grid line arrangement of the second battery wafer.

2. The BC cell string arranging method according to claim 1, characterized in that In the step of continuously conveying the first battery wafers and forming multiple groups of battery groups each composed of 2n of the first battery wafers arranged in an array, it includes: Taking a of the first battery wafers arranged in an array as a group and conveying them in sequence c times, and finally taking (2n - ca) of the first battery wafers as a group for conveying, and forming multiple groups of the battery wafer groups in this cycle, Wherein, a ≥ 1, c ≥ 1, ca ≤ 2n, and c and a are integers.

3. The BC cell string arranging method according to claim 1, wherein In the step that, in the array direction, n of the first battery wafers at odd positions in the i-th group of the battery wafer groups are rotated 180° to form n second battery wafers, and n of the first battery wafers at even positions in the (i + 1)-th group of the battery wafer groups are rotated 180° to form n second battery wafers, it includes: In the array direction, while 2n of the first battery wafers are continuously moving to the cloth wafer station for array arrangement, the s-th first battery wafer is rotated 180° to form the second battery wafer, and then moves to the cloth wafer station to form the i-th group of the battery wafer groups, or, 2n of the first battery wafers are continuously moved to the cloth wafer station to form the i-th group of the battery wafer groups, and n of the first battery wafers at odd positions in the i-th group of the battery wafer groups are rotated 180° to form n second battery wafers; In the array direction, while 2n of the first battery wafers are continuously moving to the cloth wafer station for array arrangement, the t-th first battery wafer is rotated 180° to form the second battery wafer, and then moves to the cloth wafer station to form the (i + 1)-th group of the battery wafer groups, or, 2n of the first battery wafers are continuously moved to the cloth wafer station to form the (i + 1)-th group of the battery wafer groups, and n of the first battery wafers at even positions in the (i + 1)-th group of the battery wafer groups are rotated 180° to form n second battery wafers, Wherein, the value range of s is the set of positive odd numbers in 0 to 2n, and the value range of t is the set of positive even numbers in 0 to 2n.

4. The BC cell string arranging method according to claim 1, wherein In the step of rotating n of the first solar cells at even positions in the i-th group of the solar cell groups by 180° to form n of the second solar cells, and rotating n of the first solar cells at odd positions in the (i + 1)-th group of the solar cell groups by 180° to form n of the second solar cells, it includes: Along the array direction, while 2n of the first solar cells continuously move to be arrayed at the sheet placing station, the t-th first solar cell rotates 180° to form the second solar cell, and then moves to the sheet placing station to form the i-th group of the solar cell groups; or, 2n of the first solar cells continuously move to the sheet placing station to form the i-th group of the solar cell groups, and n of the first solar cells at even positions in the i-th group of the solar cell groups are rotated 180° to form n of the second solar cells; Along the array direction, while 2n of the first solar cells continuously move to be arrayed at the sheet placing station, the s-th first solar cell rotates 180° to form the second solar cell, and then moves to the sheet placing station to form the (i + 1)-th group of the solar cell groups; or, 2n of the first solar cells continuously move to the sheet placing station to form the (i + 1)-th group of the solar cell groups, and n of the first solar cells at odd positions in the (i + 1)-th group of the solar cell groups are rotated 180° to form n of the second solar cells. Wherein, the value range of s is the set of positive odd numbers from 0 to 2n, and the value range of t is the set of positive even numbers from 0 to 2n.

5. A cloth sheet device for implementing the BC cell string tabbing method according to any one of claims 1 to 4, characterized in that, It includes: A feeding mechanism (100) for continuously conveying the first solar cells; A sheet carrying mechanism (200) for successively carrying the i-th group of the solar cell groups and the (i + 1)-th group of the solar cell groups, and the i-th group of the solar cell groups or the (i + 1)-th group of the solar cell groups is formed by n of the first solar cells and n of the second solar cells arranged alternately and conveyed by the feeding mechanism (100); A sheet arranging mechanism (300) for rotating n of the first solar cells at odd positions in the i-th group of the solar cell groups by 180° to form n of the second solar cells, rotating n of the first solar cells at even positions in the (i + 1)-th group of the solar cell groups by 180° to form n of the second solar cells, or rotating n of the first solar cells at even positions in the i-th group of the solar cell groups by 180° to form n of the second solar cells, and rotating n of the first solar cells at odd positions in the (i + 1)-th group of the solar cell groups by 180° to form n of the second solar cells.

6. The patch device according to claim 5, wherein The sheet arranging mechanism (300) includes a lifting driving member and a rotating hand, and the rotating hand is arranged at the driving end of the lifting driving member.

7. The patch device according to claim 5, characterized in that, The carrier mechanism (200) includes a carrier table, a first telescopic driving member, a second telescopic driving member, and a plurality of rotating suction cups. The first telescopic driving member and the second telescopic driving member are both disposed on the carrier table. A part of the plurality of rotating suction cups is connected to the telescopic end of the first telescopic driving member, and another part of the plurality of rotating suction cups is connected to the telescopic end of the second telescopic driving member. A part of the plurality of rotating suction cups and another part of the plurality of rotating suction cups are arranged in a staggered manner along the array direction.

8. The patch device according to claim 5, characterized in that, The loading mechanism (100) includes a first loading table (110). The first loading table (110) can carry a plurality of the first battery cells arranged in an array, and the first loading table (110) can transport the plurality of the first battery cells to the carrier mechanism (200).

9. The patch device according to claim 5, characterized in that, The loading mechanism (100) includes a first loading table (110) and a second loading table (120). Both the first loading table (110) and the second loading table (120) can carry s of the first battery cells arranged in an array. The first loading table (110) and the second loading table (120) can cyclically transport s of the first battery cells to the carrier mechanism (200), where 0 < s < n and s is an integer.

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