Multi-slice cell stringing method and stringing device

Abstract

The present application relates to the technical field of photovoltaic module, and specifically discloses a multi-slice cell stringing method and a stringing device, the multi-slice cell stringing method comprising the following steps: placing a plurality of fixtures corresponding to cell carrying tables on a composite flow line. Each solder strip prepared by a solder strip preparation device has a first solder strip section on the first surface of the cell and a second solder strip section extending from the cell, wherein the second solder strip section is fixed by the fixture; the first solder strip section is fixed to the first surface of the cell to form a composite part. A plurality of composite parts are synchronously turned over together with a plurality of fixtures and placed in a plurality of jointing stations of a jointing device; the plurality of jointing stations are close to each other so that the second solder strip section in a subsequent composite part is placed on the second surface of the cell in a previous composite part to form a jointed part; and the second solder strip section is fixed to the second surface of the cell to form a cell string. By means of the above method, a plurality of cells can be stringed at one time, and the stringing efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module technology, and in particular to a method and equipment for stringing multi-cell solar cells. Background Technology

[0002] In photovoltaic module manufacturing, connecting multiple solar cells in series using conductive solder ribbons to form a cell string is one of the core processes. Depending on the cell structure, cell stringing technology is mainly divided into two categories: coated stringing technology suitable for conventional bifacial contact cells (such as TOPCon cells) and coated stringing technology suitable for back-contact cells (BC cells). For TOPCon cells, the metallized electrodes are distributed on both the front and back sides of the cell. Typically, a single solder ribbon is used to alternately connect the front and back sides of adjacent cells, thus forming a series circuit.

[0003] In the existing TOPCon coating and stringing process, the conventional approach is to first attach one end of the solder ribbon to the front electrode of a solar cell using adhesive film, while the other end of the solder ribbon extends outwards. Then, the solar cell is mechanically flipped so that its back side faces down, and the extended solder ribbon is overlapped and fixed to the back electrode of another solar cell located in front of it. Finally, the back of the solar cell and the solder ribbon are coated and fixed, thus completing the series connection of the two solar cells. This process only flips and overlaps a single solar cell at a time, making it difficult to operate multiple solar cells simultaneously, severely impacting production line efficiency.

[0004] Therefore, it is urgent to study a method and equipment for stringing multi-segmented solar cells to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a method and equipment for stringing multi-segment solar cells, so as to solve the problem of low production efficiency caused by the fact that only one solar cell can be flipped at a time in the existing multi-segment solar cell stringing method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A method for stringing multi-segment solar cells includes: S1. Place several tooling fixtures on the composite flow line, and each tooling fixture corresponds to one of the several battery cell support platforms on the composite flow line. S2. The cell feeding device places a number of cells one by one onto a number of cell support platforms using a cell handling hand. S3. The ribbon preparation device prepares several ribbon groups and uses a ribbon transporter to transport several ribbon groups to the top of the corresponding solar cell. Each ribbon in the ribbon group has a first ribbon segment located on the first surface of the solar cell and a second ribbon segment extending out of the solar cell. The second ribbon segment is fixed by a tooling. S4. Fix the first welding strip to the first surface of the battery cell to form a composite component; S5. Several composite parts are transported to the flipping position through the composite flow line, and several composite parts together with several tooling are flipped and placed in several assembly stations of the assembly device through the flipping and handling mechanism. S6. Several lamination stations are brought close together to bring several composite parts closer together, so that the second weld strip in the later composite part is placed on the second surface of the battery cell of the previous composite part to form a lamination. S7. Fix the second welding strip to the second surface of the battery cell to form a battery string.

[0007] As an alternative technical solution for multi-cell battery assembly, in S4, a first membrane strip is provided by a membrane strip preparation device and transported to the first surface of the battery cell by a first membrane strip transporter, so as to attach the first solder strip segment to the first surface of the battery cell to form a composite.

[0008] As an optional technical solution for a multi-cell battery stringing method, in S7, the back coating device provides a second film strip and transports the film strip to the second surface of the battery cell by a second film strip transporter to coat the second surface of the battery cell, and fixes the second solder strip segment to the second surface of the battery cell to form a battery string.

[0009] As an optional technical solution for multi-cell battery stringing, in S3, the ribbon handling hand places the ribbon group on the battery cell without releasing the ribbon group. After S4, the ribbon handling hand releases the ribbon group.

[0010] As an alternative technical solution for multi-cell battery stringing, in S4, the preparation of the first membrane strip includes the following methods: S41. Pull the film strip to the upper surface of the quadrilateral film-making mechanism using the film-pulling hand; S42. The film pressing mechanism presses the film strip on the upper surface of the quadrilateral film forming mechanism; S43. The cutting blade located in the film pressing mechanism operates to cut the film strip into the first film strip required for the width of the corresponding battery cell. S44. The pressing mechanism moves away from the quadrilateral film-forming mechanism, the quadrilateral film-forming mechanism rotates, and the first film strip located on the upper surface of the quadrilateral film-forming mechanism changes pitch until the first film strip reaches the lower surface of the quadrilateral film-forming mechanism. S45, The quadrilateral film-forming mechanism attaches the first film strip located on the lower surface to the first surface of the battery cell in the composite flow line.

[0011] As an optional technical solution for multi-cell battery stringing, the rotation of the quadrilateral film-forming mechanism is synchronized with the pitch change of several first film strips.

[0012] As an optional technical solution for multi-cell battery stringing, in S6, the tooling receives and fixes the bottom end of the second welding strip segment higher than the top end of the battery cell.

[0013] As an optional technical solution for multi-cell battery stringing, in S6, the stacking device includes several adjustable-angle support platforms. After each composite component is placed on its corresponding support platform, the support platform rotates around the long side of the battery cell it supports, causing the composite component to rotate. This causes one end of the battery cell in the composite component to be lifted, and another composite component moves toward the battery cell whose end is lifted, until the battery cell portion of the other composite component is located below the battery cell whose end is lifted, thus achieving negative-pitch contact between two adjacent battery cells.

[0014] As an optional technical solution for multi-cell battery stringing, in S7, the cells and several tooling in the cell stacking device are first transported to the stringing platform by the cell stacking transporter, and then the second welding strip is fixed to the second surface of the cell to form a battery string.

[0015] A multi-cell solar cell stringing device, used to implement the multi-cell solar cell stringing method described in any of the above technical solutions, includes a composite flow line, a solar cell feeding device, a solder ribbon preparation device, a film strip preparation device, a flipping and conveying mechanism, a lamination device, and a back coating device. The composite flow line is used to carry and transport the solar cell support platform and tooling. The solar cell feeding device is used to supply solar cells to the solar cell support platform. The solder ribbon preparation device is used to prepare solder ribbons and place them on the solar cells. The flipping and conveying mechanism is used to flip the composite formed by fixing the solder ribbons and solar cells to the lamination device to form a laminate. The film strip preparation device is used to prepare a first film strip, which is used to fix a first solder ribbon segment to a first surface of the solar cell. The back coating device is used to prepare a second film strip, which is used to fix a second solder ribbon segment to a second surface of the solar cell to form a solar cell string.

[0016] The present invention has at least the following beneficial effects: This invention provides a method and equipment for stringing multi-cell solar cells. The method includes the following steps: S1. Placing several tooling fixtures on a composite flow line, with each tooling fixture corresponding to a solar cell support platform on the composite flow line. S2. A solar cell feeding device places several solar cells onto the solar cell support platforms one-to-one using a solar cell transporter. S3. A ribbon preparation device prepares several ribbon groups and transports these ribbon groups above the corresponding solar cells using a ribbon transporter. Each ribbon in the ribbon group has a first ribbon segment located on the first surface of the solar cell and a second ribbon segment extending out of the solar cell, wherein the second ribbon segment is fixed by a tooling fixture. S4. The first ribbon segment is fixed to the first surface of the solar cell to form a composite component. S5. The composite components are transported to a flipping position via the composite flow line, and the composite components, along with several tooling fixtures, are simultaneously flipped and placed at several joining stations of the joining device using a flipping and transporting mechanism. S6. Several lamination stations are brought close together to bring several composite components closer together, so that the second weld strip segment of the later composite component is placed on the second surface of the battery cell of the previous composite component, forming a lamination. S7. The second weld strip segment is fixed to the second surface of the battery cell to form a battery string. Using the above method, multiple battery cells can be strung together at once, greatly improving stringing efficiency. The tooling ensures that the second weld strip segment does not deform during the flipping process, guaranteeing reliable docking with adjacent battery cells. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0018] Figure 1 This is a flowchart of a method for stringing multiple battery cells according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the multi-cell battery stringing device in an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of the solder strip preparation device in an embodiment of the present invention; Figure 4 This is a schematic diagram of the composite sheet structure in an embodiment of the present invention; Figure 5 for Figure 4 A magnified view of a section at point A in the middle; Figure 6 for Figure 5 A magnified view of a section at point B in the middle; Figure 7This is a schematic diagram of the quadrilateral film-forming mechanism in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the first membrane strip before the pitch change in an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the first membrane strip after the pitch is changed in an embodiment of the present invention.

[0019] In the picture: 1000, solar cell; 1100, first surface; 1200, second surface; 2000, first membrane strip; 100. Composite streamline; 110. Tooling; 200. Cell feeding device; 300. Welding strip preparation device; 310. First welding strip segment; 320. Second welding strip segment; 330. Welding strip guiding mechanism; 340. Strip pulling handle; 350. Welding strip clamp; 400. Assembly device; 500. Membrane strip preparation device; 510. Quadrilateral membrane forming mechanism; 511. Upper surface; 512. Lower surface; 600. Back-side lamination device; 700. Tooling Streamline. Detailed Implementation

[0020] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0021] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0022] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0023] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0024] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0025] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0026] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0027] like Figures 1 to 9As shown, this embodiment provides a method for stringing multi-cell solar cells, which includes the following steps: S1, placing a plurality of tooling fixtures 110 on a composite flow line 100, with each tooling fixture 110 corresponding to a plurality of solar cell support platforms on the composite flow line 100. S2, a solar cell feeding device 200 using a solar cell transporter to place a plurality of solar cells 1000 one-to-one onto the solar cell support platforms. S3, a solder ribbon preparation device 300 preparing a plurality of solder ribbon groups and transporting the solder ribbon groups above the corresponding solar cells 1000 using a solder ribbon transporter. Each solder ribbon in the solder ribbon group has a first solder ribbon segment 310 located on the first surface 1100 of the solar cell 1000 and a second solder ribbon segment 320 extending out of the solar cell 1000, wherein the second solder ribbon segment 320 is fixed by tooling fixtures 110. S4, fixing the first solder ribbon segment 310 to the first surface 1100 of the solar cell 1000 to form a composite component. S5. Several composite components are transported to the flipping position via the composite flow line 100, and the composite components, along with several tooling fixtures 110, are simultaneously flipped and placed at several joining stations of the joining device 400 via the flipping and conveying mechanism. S6. The joining stations are brought closer together to bring the composite components closer together, so that the second welding strip segment 320 of the subsequent composite component is placed on the second surface 1200 of the battery cell 1000 of the previous composite component, forming a composite. S7. The second welding strip segment 320 is fixed to the second surface 1200 of the battery cell 1000 to form a battery string. Using the above method, multiple battery cells 1000 can be strung together at once, greatly improving the stringing efficiency. The tooling fixtures 110 ensure that the second welding strip segment 320 does not deform during the flipping process, guaranteeing reliable docking with adjacent battery cells 1000.

[0028] In step S4, a first film strip 2000 is provided by the film strip preparation apparatus 500, and the first film strip 2000 is transported to the first surface 1100 of the solar cell 1000 by the first film strip transporter, so as to attach the first solder strip segment 310 to the first surface 1100 of the solar cell 1000 to form a composite. The bonding of the first film strip 2000 ensures the reliability of the connection between the first solder strip segment 310 and the solar cell 1000.

[0029] In other embodiments, at least two magnetic elements are pre-embedded in the solar cell 1000 to achieve magnetic attraction of the first solder strip 310. Therefore, there is no need to prepare and attach the first film strip 2000, and the installation position of the first solder strip 310 can be guaranteed, greatly improving the stringing efficiency.

[0030] In other embodiments, the first solder strip 310 and the battery cell 1000 can also be fixedly connected by local dispensing or conductive adhesive bonding.

[0031] In S7, the back-coating device 600 provides a second film strip and transports it to the second surface 1200 of the battery cell 1000 by a second film strip transporter to coat the second surface 1200 of the battery cell 1000 with film, thereby fixing the second solder strip segment 320 to the second surface 1200 of the battery cell 1000 to form a battery string. The adhesion of the second film strip ensures the reliability of the connection between the second solder strip segment 320 and the battery cell 1000.

[0032] In an embodiment where the battery cell 1000 has a magnetic attractor, the magnetic attractor is used to magnetically attract the second solder strip segment 320. In this embodiment, the magnetic attractor can simultaneously attract the first solder strip segment 310 on the first surface 1100 and the second solder strip segment 320 on the second surface 1200, greatly improving the stringing efficiency.

[0033] In other embodiments, the second welding strip 320 and the battery cell 1000 can also be fixed together by local dispensing or bonding with conductive adhesive.

[0034] In step S3, the ribbon handler places the ribbon assembly onto the solar cell 1000 without releasing its grip. After step S4, the ribbon handler releases the ribbon assembly. Specifically, after the first film strip handler of the film strip preparation apparatus 500 attaches the first film strip 2000 to the first surface 1100 of the solar cell 1000, fixing the ribbon assembly to the grid line bonding section of the first surface 1100 of the solar cell 1000, the ribbon handler releases the ribbon assembly. This further improves the stability of the position and shape of the second ribbon segment 320.

[0035] The first film strip preparation device 500 includes a film pulling hand, a quadrilateral film forming mechanism 510, and a cutting knife. The quadrilateral film forming mechanism 510 can rotate around the rotation center. Each of its four sides is provided with a receiving plate. Each receiving plate is composed of multiple movable sub-plates, and the gap between adjacent sub-plates forms a cutting gap.

[0036] In S4, the preparation of the first membrane strip 2000 includes the following methods: S41. The film strip is pulled to the upper surface 511 of the quadrilateral film-forming mechanism 510 by the film-pulling hand. Both the film-pulling hand and the quadrilateral film-forming mechanism 510 belong to the film strip preparation device 500.

[0037] S42, The film pressing mechanism presses the film strip on the upper surface 511 of the quadrilateral film forming mechanism 510.

[0038] S43. The cutting blade located in the film pressing mechanism operates to cut the film strip into the first film strip 2000 required for the width of the corresponding 1000 battery cell.

[0039] S44. The pressing mechanism moves away from the quadrilateral film-forming mechanism 510, and the quadrilateral film-forming mechanism 510 rotates until the first film strip 2000 reaches the lower surface 512 of the quadrilateral film-forming mechanism 510; the first film strip 2000 located on the upper surface 511 of the quadrilateral film-forming mechanism 510 changes pitch. It should be noted that during the rotation process of the quadrilateral film-forming mechanism 510, until the cut first film strip 2000 rotates with the mechanism to the lower surface 512 and completes the pitch change; at the same time, the receiving plate on the upper surface 511 of the quadrilateral film-forming mechanism 510 adjusts the spacing to the initial state, ready to receive the next film strip.

[0040] S45, the quadrilateral film-forming mechanism 510 attaches the first film strip 2000 located on the lower surface 512 to the first surface 1100 of the battery cell 100 in the composite flow line 100. This method enables efficient preparation of the first film strip 2000, and prepares several first film strips 2000 at a time, forming several film strip groups to correspond to several solder ribbon groups. Each first film strip 2000 in a film strip group corresponds one-to-one with each solder ribbon in a solder ribbon group. In this embodiment, four film strip groups are prepared at a time. In other embodiments, when 10 battery cells 1000 participate in stringing, 10 film strip groups can be prepared at once.

[0041] To improve adhesion efficiency, in some embodiments, the rotation of the quadrilateral film-forming mechanism 510 is synchronized with the pitch change of several first film strips 2000.

[0042] like Figure 5 and Figure 6 As shown, in S6, the tooling 110 receives and fixes the bottom end of the second solder strip 320 above the top end of the solar cell 1000. Therefore, at this time, the end of the second solder strip 320 away from the solar cell 1000 is higher than the solar cell 1000, facilitating the movement of the solar cell 1000 in the other composite component below the previous second solder strip 320 during lamination. In S6, the second solder strip 320 is either curved upwards or in a slanted straight line. In some embodiments, the second solder strip 320 is attracted by the receiving end of the tooling 110.

[0043] In S6, the laminating device 400 includes several adjustable-angle support platforms. After each composite component is placed on its corresponding support platform, the support platform rotates around the long side of one of the supported solar cells 1000, causing the composite component to rotate. This lifts one end of the solar cell 1000 in the composite component, and another composite component moves toward the lifted solar cell 1000 until the solar cell 1000 portion of the other composite component is located below the lifted solar cell 1000, achieving negative-pitch contact between adjacent solar cells 1000. When there is a gap between adjacent solar cells 1000, forming a non-negative-pitch battery string, the support platform does not need to rotate.

[0044] For ease of understanding, such as Figure 5 As shown, the support platform rotates around the long left side of the battery cell 1000 it supports, causing the composite component to rotate, which lifts the right end of the battery cell 1000 in the composite component.

[0045] In step S7, the wafers and several tooling fixtures 110 in the wafer assembly device 400 are first transported to the stringing platform by a wafer assembly transporter. Then, the second welding strip 320 is fixed to the second surface 1200 of the battery cell 1000 to form a battery string. The above method helps to simplify the structure of the wafer assembly device 400, reduce the types of processes performed on the wafer assembly device 400, and improve equipment reliability.

[0046] In other embodiments, in S7, the second welding strip 320 is fixed to the second surface 1200 in the laminating device 400 to eliminate the need for a stringing platform, reduce the number of transfers, and improve production efficiency.

[0047] In S1, the tooling transporter moves tooling 110 from tooling flow line 700 to composite flow line 100; after S7, there is also S8, where the tooling transporter removes tooling 110 from the battery string and places it in tooling flow line 700. The above method enables the reuse of tooling 110.

[0048] In S2, the cell feeding device 200 provides the required number of cells 1000 and places the cells 1000 on the cell carrier platform by the cell transporter, with each cell corresponding to a cell carrier platform.

[0049] This embodiment also provides a multi-cell battery stringing device for implementing the multi-cell battery stringing method in any of the above embodiments. The multi-cell battery stringing device includes a composite flow line 100, a battery cell feeding device 200, a ribbon preparation device 300, a flipping and conveying mechanism, and a stacking device 400. The composite flow line 100 is used to carry and transport the battery cell support platform and tooling 110. The battery cell feeding device 200 is used to supply battery cells 1000 to the battery cell support platform. The ribbon preparation device 300 is used to prepare ribbons and place the ribbons on the battery cells 1000. The flipping and conveying mechanism is used to flip the composite formed by fixing the ribbons and battery cells 1000 to the stacking device 400 to form a stack.

[0050] The multi-cell battery stringing equipment also includes a stringing platform. The cell assembly and handling operator moves the cells in the cell assembly device 400 and several tooling fixtures 110 to the stringing platform, and fixes the second welding strip 320 to the second surface 1200 of the cell 1000 to form a battery string.

[0051] The welding strip preparation device 300 consists of a strip puller 340, a cutting blade, and a welding strip transporter. The welding strip transporter has several welding strip clamps 350, which are arranged in pairs. Each pair of welding strip clamps 350 is used to clamp the two ends of the welding strip to be cut. The distance between different pairs of welding strip clamps 350 is adjustable. When the welding strip raw material is cut, there is a gap between different pairs of welding strip clamps 350. After the strip puller 340 pulls the welding strip raw material from the feed roll, the welding strip transporter clamps the welding strip. At this time, the cutting blade moves toward the welding strip transporter and cuts the welding strip raw material into welding strip through the gap between different pairs of welding strip clamps 350. Then the welding strip transporter moves, and the distance of the welding strip transporter changes during the movement, so that the distance between different pairs of welding strip clamps 350 reaches the required distance.

[0052] In some embodiments, the multi-cell battery stringing equipment further includes a tooling flow line 700 for conveying tooling 110 so that tooling 110 is circulated during the battery string assembly process.

[0053] The multi-cell battery stringing equipment also includes a membrane strip preparation device 500, which provides a first membrane strip 2000 and transports the first membrane strip 2000 to the first surface 1100 of the battery cell 1000 by a first membrane strip transporter.

[0054] The multi-cell battery stringing equipment also includes a back coating device 600, which provides a second film strip and transports the film strip to the second surface 1200 of the battery cell 1000 by a second film strip transporter.

[0055] Multi-cell battery stringing equipment also includes a stringing platform, which is used to carry the cells together.

[0056] The composite flow line 100 and the ribbon preparation apparatus 300 are equipped with a ribbon guiding mechanism 330, which supports the suspended second ribbon segment 320 and controls the orientation of the ribbon. The ribbon guiding mechanism 330 has ribbon guiding grooves that correspond one-to-one with the ribbons. The bottom of the guiding groove supports the suspended portion of the ribbon, and the groove wall guides and limits its movement.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for stringing multi-segmented solar cells, characterized in that, include: S1. Place several tooling fixtures (110) on the composite streamline (100), and the tooling fixtures (110) correspond one-to-one with the several battery cell support platforms on the composite streamline (100); S2. The cell feeding device (200) places a number of cells (1000) one by one onto a number of cell support platforms by means of a cell transporter. S3. The ribbon preparation device (300) prepares several ribbon groups and transports several ribbon groups to the top of the corresponding battery cell (1000) by a ribbon transporter. Each ribbon in the ribbon group has a first ribbon segment (310) located on the first surface (1100) of the battery cell (1000) and a second ribbon segment (320) extending out of the battery cell (1000). The second ribbon segment (320) is fixed by a tooling (110). S4. Fix the first welding strip segment (310) to the first surface (1100) of the battery cell (1000) to form a composite part; S5. Several composite parts are transported to the flipping position through the composite flow line (100), and several composite parts together with several tooling (110) are flipped and placed in several assembly stations of the assembly device (400) through the flipping and conveying mechanism. S6. Several lamination stations are brought close together to bring several composite parts closer together, so that the second weld strip segment (320) in the latter composite part is placed on the second surface (1200) of the battery cell (1000) of the former composite part to form a lamination. S7. Fix the second welding strip (320) to the second surface (1200) of the battery cell (1000) to form a battery string.

2. The method for stringing multi-segmented battery cells according to claim 1, characterized in that, In S4, a first membrane strip (2000) is provided by a membrane strip preparation device (500) and the first membrane strip (2000) is transported to the first surface (1100) of the battery cell (1000) by a first membrane strip transporter, so as to attach the first weld strip segment (310) to the first surface (1100) of the battery cell (1000) to form a composite.

3. The method for stringing multi-segmented battery cells according to claim 2, characterized in that, In S7, the back coating device (600) provides a second film strip and transports the film strip to the second surface (1200) of the battery cell (1000) by the second film strip transporter to coat the second surface (1200) of the battery cell (1000) with film, and fixes the second solder strip segment (320) to the second surface (1200) of the battery cell (1000) to form a battery string.

4. The method for stringing multi-segmented battery cells according to claim 2, characterized in that, In S3, the ribbon handler places the ribbon assembly onto the battery cell (1000) without releasing the grip on the ribbon assembly. After S4 is completed, the ribbon handler releases the ribbon assembly.

5. The method for stringing multi-segmented battery cells according to claim 2, characterized in that, In S4, the preparation of the first membrane strip (2000) includes the following methods: S41. Pull the film strip to the upper surface (511) of the quadrilateral film-making mechanism (510) by the film-pulling hand. S42, The film pressing mechanism presses the film strip on the upper surface (511) of the quadrilateral film forming mechanism (510); S43. The cutting knife located in the film pressing mechanism operates to cut the film strip into the first film strip (2000) required for the width of the corresponding battery cell (1000). S44. The pressing mechanism moves away from the quadrilateral film forming mechanism (510), the quadrilateral film forming mechanism (510) rotates, and the first film strip (2000) located on the upper surface (511) of the quadrilateral film forming mechanism (510) changes pitch until the first film strip (2000) reaches the lower surface (512) of the quadrilateral film forming mechanism (510). S45, the quadrilateral film forming mechanism (510) attaches the first film strip (2000) located on the lower surface (512) to the first surface (1100) of the battery cell (1000) in the composite flow line (100).

6. The method for stringing multi-segmented battery cells according to claim 5, characterized in that, The rotation of the quadrilateral film-forming mechanism (510) is synchronized with the pitch change of several first film strips (2000).

7. The method for stringing multi-segmented battery cells according to claim 1, characterized in that, In S6, the tooling (110) receives and fixes the bottom end of the second welding strip (320) above the top end of the battery cell (1000).

8. The method for stringing multi-segmented battery cells according to claim 7, characterized in that, In S6, the laminating device (400) includes several adjustable-angle support platforms. After each composite component is placed on the corresponding support platform, the support platform rotates around the long side of the battery cell (1000) it supports, causing the composite component to rotate. This causes one end of the battery cell (1000) in the composite component to be lifted, and another composite component moves toward the battery cell (1000) whose end is lifted, until the battery cell (1000) of the other composite component is located below the battery cell (1000) whose end is lifted, thus achieving negative-pitch contact between two adjacent battery cells (1000).

9. The method for stringing multi-segmented battery cells according to any one of claims 1-8, characterized in that, In S7, the wafers and several tooling (110) in the wafer assembly device (400) are first transported to the stringing platform by the wafer assembly transporter, and then the second welding strip (320) is fixed to the second surface (1200) of the battery cell (1000) to form a battery string.

10. A multi-cell battery cell stringing device, used to implement the multi-cell battery cell stringing method according to any one of claims 1-9, characterized in that, The device includes a composite flow line (100), a cell feeding device (200), a ribbon preparation device (300), a film strip preparation device (500), a flipping and conveying mechanism, a laminating device (400), and a back laminating device (600). The composite flow line (100) is used to carry and transport the cell support platform and tooling (110). The cell feeding device (200) is used to supply cells (1000) to the cell support platform. The ribbon preparation device (300) is used to prepare ribbons and place them on the cells (1000). The flipping and conveying mechanism is used to... The composite formed after the welding ribbon and the battery cell (1000) are fixed is flipped into the lamination device (400) to form a laminate. The film strip preparation device (500) is used to prepare a first film strip (2000). The first film strip (2000) is used to fix the first welding ribbon segment (310) of the welding ribbon to the first surface (1100) of the battery cell (1000). The back coating device (600) is used to prepare a second film strip. The second film strip is used to fix the second welding ribbon segment (320) of the welding ribbon to the second surface (1200) of the battery cell (1000) to form a battery string.

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