A method and device for arranging BC battery cells in a row

Abstract

The application discloses a BC battery string arrangement method and a piece arrangement device. The BC battery string arrangement method comprises continuously conveying first battery pieces and forming a plurality of groups of battery groups arranged by 2n first battery pieces in an array. In the array direction, n first battery pieces in odd positions in an i-th group of battery piece groups are rotated by 180 DEG to form n second battery pieces, and n first battery pieces in even positions in an (i+1)-th group of battery piece groups are rotated by 180 DEG to form n second battery pieces. Alternatively, n first battery pieces in even positions in the i-th group of battery piece groups are rotated by 180 DEG to form n second battery pieces, and n first battery pieces in odd positions in the (i+1)-th group of battery piece groups are rotated by 180 DEG to form n second battery pieces. The above scheme can solve the problem of continuous production of two different string type BC battery strings used for photovoltaic module layout.

Description

Technical Field

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

[0002] BC cell strings (back-contact cell strings), with their light-facing grid-free structure, fully utilize sunlight, resulting in higher efficiency. During the production of photovoltaic modules using BC cell strings composed of even-numbered half-cell cells with an even number of grid lines, it was discovered during the alignment process that the soldering ribbons of some BC cell strings could not be welded near the bend of the busbar. If these BC cell strings were shifted horizontally to avoid this, the overall aesthetics of the photovoltaic module would be poor.

[0003] In the related art, since two different half-cells are obtained after the cell is diced, based on the same arrangement of the solder ribbon group, the arrangement of multiple cells (such as Figure 1 As shown), two different types of BC battery strings can be obtained. Using these two BC battery strings to layout photovoltaic modules can solve the problem of avoiding the bending area of ​​the bent busbar. In order to achieve continuous production of BC battery strings and photovoltaic modules, a layout method is urgently needed to achieve the cyclic production of two different types of BC battery strings. Summary of the Invention

[0004] The object of the present invention is to provide a BC battery string arrangement method to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: On the one hand, the present application provides a BC battery string arrangement method, comprising:

[0006] Continuously conveying the first battery cells to form multiple battery packs each consisting of 2n arrays of the first battery cells.

[0007] Along the array direction, the odd-numbered n first battery cells in the i-th battery cell group are rotated 180° to form n second battery cells, and the even-numbered n first battery cells in the (i+1)-th battery cell group are rotated 180° to form n second battery cells;

[0008] Alternatively, the n even-numbered first battery cells in the i-th battery cell group are rotated 180° to form n second battery cells, and the n odd-numbered first battery cells in the (i+1)-th battery cell group are rotated 180° to form n second battery cells;

[0009] Wherein, i is a positive odd number, n is an integer, n>1, the number of grid lines of the first cell piece and the number of grid lines of the second cell piece are both even numbers, and the grid line arrangement of the first cell piece after rotating 180° is the same as that of the second cell piece.

[0010] Preferably, in the step of continuously conveying the first cell piece and forming a plurality of groups of cell groups arranged by 2n first cell pieces, the step comprises:

[0011] The first cell piece array is arranged as a group, and is conveyed in turn c times, and the last time (2n-ca) first cell pieces are conveyed as a group, and the cycle is formed into a plurality of cell groups, wherein a≥1, c≥1, ca≤2n, and c and a are integers.

[0012] Preferably, in the step of rotating 180° the odd-numbered n first cell pieces in the i-th group of cell groups to form n second cell pieces and rotating 180° the even-numbered n first cell pieces in the (i+1)-th group of cell groups to form n second cell pieces along the array direction, the step comprises:

[0013] In the step of continuously moving 2n first cell pieces to the array arrangement of the cell placement station while rotating 180° the s-th first cell piece to form the second cell piece, and then moving to the cell placement station to form the i-th group of cell groups, or continuously moving 2n first cell pieces to the cell placement station to form the i-th group of cell groups, and rotating 180° the odd-numbered n first cell pieces in the i-th group of cell groups to form n second cell pieces along the array direction.

[0014] In the step of continuously moving 2n first cell pieces to the array arrangement of the cell placement station while rotating 180° the t-th first cell piece to form the second cell piece, and then moving to the cell placement station to form the (i+1)-th group of cell groups, or continuously moving 2n first cell pieces to the cell placement station to form the (i+1)-th group of cell groups, and rotating 180° the even-numbered n first cell pieces in the (i+1)-th group of cell groups to form n second cell pieces, wherein s is a positive odd number in the range of 0~2n, and t is a positive even number in the range of 0~2n.

[0015] Preferably, in the step of rotating 180° the odd-numbered n first cell pieces in the i-th group of cell groups to form n second cell pieces and rotating 180° the even-numbered n first cell pieces in the (i+1)-th group of cell groups to form n second cell pieces, the step comprises:

[0016] In the array direction, 2n first battery pieces continuously move to the array arrangement of the piece work station while the tth first battery piece rotates 180° to form the second battery piece, and then moves to the piece work station to form the ith group of battery piece groups, or 2n first battery pieces continuously move to the piece work station to form the ith group of battery piece groups, and the even-numbered n first battery pieces in the ith group of battery piece groups rotate 180° to form n second battery pieces.

[0017] In the array direction, 2n first battery pieces continuously move to the array arrangement of the piece work station while the s th first battery piece rotates 180° to form the second battery piece, and then moves to the piece work station to form the (i+1)th group of battery piece groups, or 2n first battery pieces continuously move to the piece work station to form the (i+1)th group of battery piece groups, and the odd-numbered n first battery pieces in the (i+1)th group of battery piece groups rotate 180° to form n second battery pieces, wherein the value range of s is 0~2n positive odd number set, and the value range of t is 0~2n positive even number set.

[0018] In another aspect, the application also provides a piece arrangement device for implementing the above-mentioned BC battery string arrangement method, comprising:

[0019] A feeding mechanism for continuously conveying the first battery pieces;

[0020] A piece carrying mechanism for sequentially carrying the ith group of battery piece groups and the (i+1)th group of battery piece groups, the ith group of battery piece groups or the (i+1)th group of battery piece groups being formed by the staggered arrangement of n first battery pieces and n second battery pieces conveyed by the feeding mechanism;

[0021] A piece arrangement mechanism for rotating the odd-numbered n first battery pieces in the ith group of battery piece groups 180° to form n second battery pieces, rotating the even-numbered n first battery pieces in the (i+1)th group of battery piece groups 180° to form n second battery pieces, or rotating the even-numbered n first battery pieces in the ith group of battery piece groups 180° to form n second battery pieces, and rotating the odd-numbered n first battery pieces in the (i+1)th group of battery piece groups 180° to form n second battery pieces.

[0022] Preferably, the piece arrangement mechanism comprises a lifting drive and a rotating hand, and the rotating hand is arranged at the driving end of the lifting drive.

[0023] Preferably, the slide mechanism comprises a slide 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 arranged on the slide table, a part of the plurality of rotating suction cups are connected with the telescopic end of the first telescopic driving member, another part of the plurality of rotating suction cups are connected with the telescopic end of the second telescopic driving member, and the part of the plurality of rotating suction cups and the other part of the plurality of rotating suction cups are staggered along the array direction.

[0024] Preferably, the feeding mechanism comprises a first feeding table, the first feeding table can carry a plurality of the first battery pieces arranged in an array, and the first feeding table can carry the plurality of the first battery pieces to the slide mechanism.

[0025] Preferably, the feeding mechanism comprises a first feeding table and a second feeding table, the first feeding table and the second feeding table can carry s first battery pieces arranged in an array, and the first feeding table and the second feeding table can cyclically carry the s first battery pieces to the slide mechanism, wherein 0

[0026] The technical scheme adopted in the present application can achieve the following beneficial effects:

[0027] In the BC battery string piece arrangement method disclosed in the present application, the first battery pieces are continuously fed, and a plurality of groups of battery pieces arranged in an array of 2n first battery pieces are formed.

[0028] In the array direction, the odd-numbered n first battery pieces in the i-th group of battery pieces are rotated by 180° to form n second battery pieces, and the even-numbered n first battery pieces in the (i+1)-th group of battery pieces are rotated by 180° to form n second battery pieces; or, the even-numbered n first battery pieces in the i-th group of battery pieces are rotated by 180° to form n second battery pieces, and the odd-numbered n first battery pieces in the (i+1)-th group of battery pieces are rotated by 180° to form n second battery pieces; wherein i takes a set of positive odd numbers, n>1, n is an integer, the first battery pieces and the second battery pieces are both even-grid-line battery pieces, and the grid-line arrangement of the first battery pieces after being rotated by 180° is the same as that of the second battery pieces.

[0029] In this step, the i-th group of battery pieces and the (i+1)-th group of battery pieces are rotated by 180° respectively, and it is worth noting that when the i-th group of battery pieces is rotated by 180°, the (i+1)-th group of battery pieces is rotated by 180°, and vice versa, so that when only the first battery pieces are fed, the piece arrangement mode of two different battery strings can be cyclically and alternately realized.

[0030] It is worth noting that the first and second battery pieces are both even grid line battery pieces, the grid line arrangement of the first battery piece after rotating 180° is the same as that of the second battery piece, the sum of the number of the first battery pieces and the number of the second battery pieces in the i-th battery piece group is even, and similarly, the sum of the number of the first battery pieces and the number of the second battery pieces in the (i+1)-th battery piece group is also even.

[0031] In the above method, the n first battery pieces are rotated to form second battery pieces, and the n first battery pieces and the n second battery pieces are staggered in the arrangement direction, so as to realize the presentation of two different piece arrangement structures, thereby ensuring the continuous production of the BC battery string and the photovoltaic module. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0033] Figure 1 It is a schematic diagram of the piece arrangement of the two different BC battery string types in the related art;

[0034] Figure 2 It is a schematic diagram of the steps of the first piece arrangement method in the BC battery string piece arrangement method disclosed in the embodiments of the present application;

[0035] Figure 3 It is a schematic diagram of the steps of the second piece arrangement method in the BC battery string piece arrangement method disclosed in the embodiments of the present application;

[0036] Figure 4 It is a schematic diagram of the steps of the third piece arrangement method in the BC battery string piece arrangement method disclosed in the embodiments of the present application;

[0037] Figure 5 It is a schematic diagram of the steps of the fourth piece arrangement method in the BC battery string piece arrangement method disclosed in the embodiments of the present application;

[0038] Figure 6 It is a structure diagram of the piece arrangement device disclosed in the embodiments of the present application.

[0039] In the figure: 100, feeding mechanism; 110, first feeding table; 120, second feeding table; 200, piece carrying mechanism; 300, piece arrangement mechanism. DETAILED DESCRIPTION

[0040] For the purpose of promoting an understanding of the application, the application will now be described in greater detail with reference to the figures. The preferred embodiments of the application are illustrated in the figures. However, the application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0041] It is noted that when a component is referred to as being "on" another component, it can be directly on the other component or intervening components can also be present. Where a component is referred to as being "connected" to another component, it can be directly connected to the other component, or intervening components can also be present.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0043] Due to the automatic process of the photovoltaic module as a whole, under the condition of ensuring the maximum conversion efficiency at present, the layout process realizes the circuit connection by laying out two different even piece battery strings, the welding strip arrangement of the two different battery strings is the same, and the piece arrangement mode of the battery pieces is different. If one of the two different piece arrangement modes is produced by interval, the subsequent process will appear discontinuous and waiting problems, and the two different piece arrangement modes are alternately circulated in the string making link to cyclically prepare two battery strings, which is beneficial to the continuous layout of the subsequent layout machine, so as to ensure the efficiency of automation, as shown in Figures 2 to 5 The BC battery string piece arrangement method disclosed in the application comprises:

[0044] S1, continuously conveying first battery pieces, and forming a plurality of groups of battery groups arranged by 2n first battery pieces in array.

[0045] S2, along the array direction, n first battery pieces at odd positions in the i-th battery piece group are rotated by 180° 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° to form n second battery pieces; or, n first battery pieces at even positions in the i-th battery piece group are rotated by 180° to form n second battery pieces, and n first battery pieces at odd positions in the (i+1)-th battery piece group are rotated by 180° to form n second battery pieces; wherein, the value range of i is a set of positive odd numbers, n>1, n is an integer, the first battery piece and the second battery piece are both even grid line battery pieces, and the grid line arrangement of the first battery piece after being rotated by 180° is the same as that of the second battery piece.

[0046] In this step, the n first battery pieces in each group are rotated by the i-th battery piece group and the (i+1)-th battery piece group, respectively. It is worth noting that when the n first battery pieces in the odd positions of the i-th battery piece group are rotated, the n first battery pieces in the even positions of the (i+1)-th battery piece group are rotated, and vice versa. Thus, when only the first battery pieces are fed, the two different battery string piece arrangement modes can be alternately implemented in a cycle.

[0047] It is worth noting that the first battery piece and the second battery piece are both even grid line battery pieces, the grid line arrangement of the first battery piece after being rotated by 180° is the same as that of the second battery piece, and the sum of the number of the first battery pieces and the number of the second battery pieces in the i-th battery piece group is even. Similarly, the sum of the number of the first battery pieces and the number of the second battery pieces in the (i+1)-th battery piece group is also even.

[0048] In the above method, the n first battery pieces are rotated to form second battery pieces, and the n first battery pieces and the n second battery pieces are staggered in the arrangement direction, so that the two different piece arrangement structures are presented, thereby ensuring the continuous production of the BC battery string and the photovoltaic module.

[0049] In the embodiments of the present application, in the step of continuously feeding the first battery pieces and forming a plurality of battery groups arranged by 2n first battery pieces, the following can be included:

[0050] S11, the first battery piece array is arranged as a group, and is fed in turn c times, and the last time (2n-ca) first battery pieces are fed as a group, and the plurality of battery groups are formed in a cycle, wherein a≥1, ca≤2n, and a is an integer.

[0051] In this step, the first battery pieces are fed as a group for arrangement, and the feeding efficiency of the first battery pieces is higher as a approaches 2n.

[0052] In an optional solution, in the step of rotating 180° the n first battery pieces in the odd positions of the i-th battery piece group to form n second battery pieces and rotating 180° the n first battery pieces in the even positions of the (i+1)-th battery piece group to form n second battery pieces along the array direction, the following can be included:

[0053] S21, while the 2n first battery pieces are continuously moved to the piece arrangement work station array, the s-th first battery piece is rotated 180° to form a second battery piece, and then moved to the piece arrangement work station to form the i-th battery piece group, or the 2n first battery pieces are continuously moved to the piece arrangement work station to form the i-th battery piece group, and the n first battery pieces in the odd positions of the i-th battery piece group are rotated 180° to form n second battery pieces.

[0054] In this step, two different piece arranging steps are further proposed for the implementation of the i-th battery piece group. Specifically, during the continuous conveying of the 2n first battery pieces, the odd-numbered first battery pieces are rotated 180° one by one, and finally the i-th battery piece group is formed in a piece arranging mode at the piece arranging station, or after the 2n first battery pieces are conveyed to the piece arranging station, the odd-numbered n first battery pieces are uniformly rotated 180°.

[0055] S22, along the array direction, the 2n first battery pieces continuously move to the array-arranged piece arranging stations, and the t-th first battery piece is rotated 180° to form a second battery piece, and then moves to the piece arranging station to form the (i+1)-th battery piece group, or the 2n first battery pieces continuously move to the piece arranging station to form the (i+1)-th battery piece group, and the even-numbered n first battery pieces in the (i+1)-th battery piece group are rotated 180° to form n second battery pieces, wherein the value range of s is the set of positive odd numbers in 0-2n, and the value range of t is the set of positive even numbers in 0-2n.

[0056] In this step, two different piece arranging steps are further proposed for the (i+1)-th battery piece group. Different from the above step, in this step, the even-numbered first battery pieces are rotated 180° one by one, and finally the (i+1)-th battery piece group is formed in a piece arranging mode at the piece arranging station, or after the 2n first battery pieces are conveyed to the piece arranging station, the even-numbered n first battery pieces are uniformly rotated 180°.

[0057] In another optional solution, in the steps of rotating the even-numbered n first battery pieces in the i-th battery piece group 180° to form n second battery pieces and rotating the odd-numbered n first battery pieces in the (i+1)-th battery piece group 180° to form n second battery pieces, the following steps can be included:

[0058] S23, along the array direction, the 2n first battery pieces continuously move to the array-arranged piece arranging stations, and the t-th first battery piece is rotated 180° to form a second battery piece, and then moves to the piece arranging station to form the (i+1)-th battery piece group, or the 2n first battery pieces continuously move to the piece arranging station to form the (i+1)-th battery piece group, and the even-numbered n first battery pieces in the (i+1)-th battery piece group are rotated 180° to form n second battery pieces, wherein the value range of s is the set of positive odd numbers in 0-2n, and the value range of t is the set of positive even numbers in 0-2n.

[0059] In this step, two different piece arranging steps are further proposed for the implementation of the i-th battery piece group. Specifically, during the continuous conveying of the 2n first battery pieces, the even-numbered first battery pieces are rotated 180° one by one, and finally the i-th battery piece group is formed in a piece arranging mode at the piece arranging station, or after the 2n first battery pieces are conveyed to the piece arranging station, the even-numbered n first battery pieces are uniformly rotated 180°.

[0060] S24, in the array direction, the 2n first battery pieces continue to move to the piece arrangement position, and the s-th first battery piece is rotated by 180° to form a second battery piece, and then moves to the piece arrangement position to form the (i+1)-th battery piece group, or the 2n first battery pieces continue to move to the piece arrangement position to form the (i+1)-th battery piece group, and the odd-numbered n first battery pieces in the (i+1)-th battery piece group are rotated by 180° to form n second battery pieces, wherein the value of s is in the range of 0~2n positive odd number set, and the value of t is in the range of 0~2n positive even number set.

[0061] In this step, two different piece arrangement steps are further proposed for the (i+1)-th battery piece group. Different from the above steps, this step is to rotate each of the odd-numbered first battery pieces by 180°, and finally form the (i+1)-th battery piece group in a piece arrangement mode at the piece arrangement position, or after the 2n first battery pieces are transported to the piece arrangement position, the odd-numbered n first battery pieces are uniformly rotated by 180°.

[0062] As shown in Figure 6 The piece arrangement device disclosed in the present application is used to implement the BC battery string piece arrangement method described above. The disclosed piece arrangement device comprises a feeding mechanism 100 for continuously transporting first battery pieces; a piece carrying mechanism 200 for sequentially carrying an i-th battery piece group and an (i+1)-th battery piece group, the i-th battery piece group or the (i+1)-th battery piece group being formed by the staggered arrangement of n first battery pieces and n second battery pieces transported by the feeding mechanism 100; and a piece arrangement mechanism 300 for rotating the odd-numbered n first battery pieces in the i-th battery piece group by 180° to form n second battery pieces, rotating the even-numbered n first battery pieces in the (i+1)-th battery piece group by 180° to form n second battery pieces, or rotating the even-numbered n first battery pieces in the i-th battery piece group by 180° to form n second battery pieces, and rotating the odd-numbered n first battery pieces in the (i+1)-th battery piece group by 180° to form n second battery pieces.

[0063] In the use process of the piece arrangement device, the feeding mechanism 100 continuously transports first battery pieces to the piece carrying mechanism 200, the piece arrangement mechanism 300 rotates the odd-numbered n first battery pieces in the i-th battery piece group by 180° to form n second battery pieces, rotates the even-numbered n first battery pieces in the (i+1)-th battery piece group by 180° to form n second battery pieces, or rotates the even-numbered n first battery pieces in the i-th battery piece group by 180° to form n second battery pieces, and rotates the odd-numbered n first battery pieces in the (i+1)-th battery piece group by 180° to form n second battery pieces, so that multiple battery piece groups can be alternately arranged on the piece carrying mechanism 200.

[0064] In the embodiment of the present application, the piece arranging mechanism 300 can include a lifting drive and a rotating hand. Specifically, the rotating hand is arranged at the driving end of the lifting drive, and the lifting drive can drive the rotating hand to move up and down. The rotating hand can simultaneously grasp n first battery pieces of odd positions in the 2n first battery pieces in continuous conveying and rotate 180°, or grasp the n first battery pieces of odd positions in the 2n first battery pieces in continuous conveying one by one and rotate 180°.

[0065] In the use process of the piece arranging device, the lifting drive drives the rotating hand to move up and down. The rotating hand can simultaneously grasp n first battery pieces of odd positions in the 2n first battery pieces in continuous conveying and rotate 180°, or grasp the n first battery pieces of odd positions in the 2n first battery pieces in continuous conveying one by one and rotate 180°. The rotating hand can perform piece grasping operation on the feeding mechanism 100, or the rotating hand can perform piece grasping operation on the piece carrying mechanism 200. The present application does not make any limitation in this regard.

[0066] In addition, the lifting drive can be a cylinder, an electric cylinder, a motor, a screw rod, or the like. The present application does not make any limitation in this regard.

[0067] In the embodiment of the present application, the piece carrying mechanism 200 can include a piece carrying table, a first telescopic drive, a second telescopic drive, and a plurality of rotating suction cups. Specifically, the first telescopic drive and the second telescopic drive are arranged on the piece carrying table. A part of the plurality of rotating suction cups is connected to the telescopic end of the first telescopic drive, and another part of the plurality of rotating suction cups is connected to the telescopic end of the second telescopic drive. The part of the plurality of rotating suction cups and the other part of the plurality of rotating suction cups are staggered along the array direction.

[0068] In an alternative scheme, the feeding mechanism 100 can include a first feeding table 110. Specifically, the first feeding table 110 can carry a plurality of first battery pieces arranged in an array. The first feeding table 110 can carry the plurality of first battery pieces to the piece carrying mechanism 200. The structure is simple and convenient to install.

[0069] In another alternative scheme, the feeding mechanism 100 can include a first feeding table 110 and a second feeding table 120. Specifically, the first feeding table 110 and the second feeding table 120 can each carry s first battery pieces arranged in an array. The first feeding table 110 and the second feeding table 120 can cyclically carry the s first battery pieces to the piece carrying mechanism 200. Herein, 0 < s < n, and s is an integer.

[0070] In the above structure, the first feeding table 110 and the second feeding table 120 cyclically carry s first battery pieces to the piece carrying mechanism 200, thereby improving the piece carrying efficiency.

[0071] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A method of BC battery stringing, characterized by, The method comprises the following steps: continuously conveying first battery pieces and forming a plurality of groups of battery pieces arranged in an array of 2n first battery pieces, in the array direction, n first battery pieces at odd positions in the i-th group of battery pieces are rotated by 180° to form n second battery pieces, and n first battery pieces at even positions in the (i+1)-th group of battery pieces are rotated by 180° to form n second battery pieces; or, n first battery pieces at even positions in the i-th group of battery pieces are rotated by 180° to form n second battery pieces, and n first battery pieces at odd positions in the (i+1)-th group of battery pieces are rotated by 180° to form n second battery pieces; wherein i is a positive odd number, n>1, n is an integer, the number of grid lines of the first battery piece and the number of grid lines of the second battery piece are both even, and the grid line arrangement of the first battery piece after being rotated by 180° is the same as that of the second battery piece.

2. The BC cell stringing sheet method according to claim 1, characterized by, In the step of continuously conveying the first battery pieces and forming a plurality of groups of battery pieces arranged in an array of 2n first battery pieces, the method comprises the following steps: arranging a in the array of first battery pieces as a group, and conveying in turn for c times, and conveying in the last time with (2n-ca) first battery pieces as a group, and forming a plurality of groups of battery pieces in this way, wherein a≥1, c≥1, ca≤2n, and c and a are integers.

3. The BC cell stringing sheet method according to claim 1, characterized by, In the step of rotating n first battery pieces at odd positions in the i-th group of battery pieces by 180° to form n second battery pieces and rotating n first battery pieces at even positions in the (i+1)-th group of battery pieces by 180° to form n second battery pieces in the array direction, the method comprises the following steps: In the step of rotating n first battery pieces at odd positions in the i-th group of battery pieces by 180° to form n second battery pieces and rotating n first battery pieces at even positions in the (i+1)-th group of battery pieces by 180° to form n second battery pieces in the array direction, the method comprises the following steps: In the step of rotating n first battery pieces at odd positions in the i-th group of battery pieces by 180° to form n second battery pieces and rotating n first battery pieces at even positions in the (i+1)-th group of battery pieces by 180° to form n second battery pieces in the array direction, the method comprises the following steps: wherein s is a positive odd number in the range of 0-2n, and t is a positive even number in the range of 0-2n.

4. The BC cell stringing sheet method of claim 1, wherein, In the step of rotating 180° the n first cells in the even positions in the i-th group of cell groups to form n second cells, and rotating 180° the n first cells in the odd positions in the (i+1)-th group of cell groups to form n second cells, comprising: In the array direction, while continuously moving the 2n first cells to the array of the piece arranging station, rotating 180° the t-th first cell to form the second cell, and then moving to the piece arranging station to form the i-th group of cell groups, or continuously moving the 2n first cells to the piece arranging station to form the i-th group of cell groups, and rotating 180° the n first cells in the even positions in the i-th group of cell groups to form n second cells; In the array direction, while continuously moving the 2n first cells to the array of the piece arranging station, rotating 180° the s-th first cell to form the second cell, and then moving to the piece arranging station to form the (i+1)-th group of cell groups, or continuously moving the 2n first cells to the piece arranging station to form the (i+1)-th group of cell groups, and rotating 180° the n first cells in the odd positions in the (i+1)-th group of cell groups to form n second 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 battery string sheeting method as claimed in any one of claims 1 to 4, characterized by, Comprising: A feeding mechanism (100) for continuously conveying the first cells; A carrier mechanism (200) for sequentially carrying the i-th group of cell groups and the (i+1)-th group of cell groups, the i-th group of cell groups or the (i+1)-th group of cell groups being formed by the staggered arrangement of n first cells and n second cells conveyed by the feeding mechanism (100); A piece arranging mechanism (300) for rotating 180° the n first cells in the odd positions in the i-th group of cell groups to form n second cells, rotating 180° the n first cells in the even positions in the (i+1)-th group of cell groups to form n second cells, or rotating 180° the n first cells in the even positions in the i-th group of cell groups to form n second cells, and rotating 180° the n first cells in the odd positions in the (i+1)-th group of cell groups to form n second cells.

6. The sheeting device of claim 5, wherein, The piece arranging mechanism (300) comprises a lifting drive and a rotating hand, and the rotating hand is arranged at the driving end of the lifting drive.

7. The sheeting device of claim 5, wherein, The slide mechanism (200) comprises a slide 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 arranged on the slide table, a part of the plurality of rotating suction cups are connected with the telescopic end of the first telescopic driving member, another part of the plurality of rotating suction cups are connected with the telescopic end of the second telescopic driving member, and the part of the plurality of rotating suction cups and the other part of the plurality of rotating suction cups are staggered along the array direction.

8. The sheeting device of claim 5, wherein, The feeding mechanism (100) comprises a first feeding table (110), the first feeding table (110) can carry a plurality of the first battery pieces arranged in an array, and the first feeding table (110) can carry the plurality of the first battery pieces to the slide mechanism (200).

9. The sheeting device of claim 5, wherein, The feeding mechanism (100) comprises a first feeding table (110) and a second feeding table (120), the first feeding table (110) and the second feeding table (120) can carry s first battery pieces arranged in an array, and the first feeding table (110) and the second feeding table (120) can cyclically carry s first battery pieces to the slide mechanism (200), wherein 0 The feeding mechanism (100) comprises a first feeding table (110) and a second feeding table (120), the first feeding table (110) and the second feeding table (120) can carry s first battery pieces arranged in an array, and the first feeding table (110) and the second feeding table (120) can cyclically carry s first battery pieces to the slide mechanism (200), wherein 0

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