A cutting and winding method and a multi-station winding device

Abstract

The application provides a cutting and winding method and a multi-station winding device. The cutting and winding method comprises the following steps: a first conveying line conveys a first material belt to a cutting station, and a second conveying line conveys a second material belt to a winding station; a winding mechanism located at the winding station obtains the second material belt to perform a winding action, and the winding mechanism located at the cutting station moves to a standby position matched with the first material belt; when the winding mechanism located at the winding station completes the winding action, the winding mechanism located at the cutting station performs a cutting action; and after each winding mechanism on a winding line completes the action of the station, the winding mechanism moves to a downstream station. The winding mechanism can cut the first material belt, so that the conveying of the first material belt and the operation of the winding mechanism do not need to be paused during cutting. The cutting and winding method can improve the continuity of the battery cell winding process, thereby helping to improve the efficiency of the winding process.

Description

Technical Field

[0001] This invention relates to the field of battery cell manufacturing, and in particular to a follow-up winding method and a multi-station winding device. Background Technology

[0002] Battery cell manufacturing can employ a winding process. In current winding methods, the basic flow involves feeding electrode sheets into winding needles. Once the needles have acquired a sufficiently long electrode sheet, the feeding and winding process stops, and the electrode sheet is cut. After cutting, the winding process continues, including needle winding, finishing, adhesive application, and unloading. The winding method uses a winding machine, which typically includes multiple stations, each responsible for different actions. Because the winding machine needs to slow down when cutting the electrode sheet, the cell manufacturing process is discontinuous and time-consuming. This winding method has become a bottleneck for improving the efficiency of battery cell manufacturing in the lithium battery industry. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a follow-cut winding method and a multi-station winding device, the follow-cut winding method can improve the continuity of the battery cell winding process.

[0004] According to the following method for follow-cutting and winding provided by the present invention, the method uses a winding line, a first conveying line, a second conveying line and at least three winding mechanisms that move along the winding line, the winding line being connected end to end, the winding line including a follow-cutting station and a winding station, the winding station being located downstream of the follow-cutting station.

[0005] The following are methods for follow-up cutting and winding:

[0006] The first conveyor line conveys the first material strip to the cutting station, and the second conveyor line conveys the second material strip to the winding station;

[0007] The winding mechanism located at the winding station acquires the second strip and performs a winding action, and the winding mechanism located at the cutting station moves to a preparatory position that is compatible with the first strip.

[0008] When the winding mechanism at the winding station completes the winding action, the winding mechanism at the cutting station performs the cutting action.

[0009] After each winding mechanism on the winding line completes its operation at its respective station, the winding mechanism moves to the downstream station.

[0010] The step of performing the chasing and cutting action includes:

[0011] The winding mechanism, located in the preparatory position, moves following the first strip;

[0012] When the winding mechanism performing the cutting action is synchronized with the first material strip, the winding mechanism cuts the first material strip and obtains the first end of the first material strip located behind the cut position.

[0013] The follow-cut winding method provided by the present invention has at least the following technical effects: the winding mechanism can follow-cut the first strip, so there is no need to stop the conveying of the first strip and the operation of the winding mechanism when cutting. The follow-cut winding method can improve the continuity of the cell winding process, thereby helping to improve the efficiency of the winding process.

[0014] According to some embodiments of the present invention, the winding line further includes an adhesive application station and a blanking station, and the winding mechanism located at the follow-up cutting station can sequentially pass through the winding station, the adhesive application station, and the blanking station to return to the follow-up cutting station. The follow-up cutting winding method further includes:

[0015] When the winding mechanism moves from the winding station to the adhesive application station, it performs a finishing action on the first material strip and the second material strip.

[0016] When the winding mechanism moves to the adhesive application station, it performs the adhesive application action.

[0017] The winding mechanism performs the unloading action when it moves to the unloading station.

[0018] According to some embodiments of the present invention, the winding line further includes a blanking station, and the winding mechanism located at the follow-up cutting station can sequentially pass through the winding station and the blanking station to return to the follow-up cutting station. The follow-up cutting winding method further includes:

[0019] After completing the winding action, the winding mechanism performs a finishing action and an adhesive application action.

[0020] The winding mechanism performs the unloading action when it is moved to the unloading station.

[0021] According to some embodiments of the present invention, the winding mechanism located at the cutting station performs a pre-winding action when it moves toward the winding station.

[0022] According to some embodiments of the present invention, the winding mechanism includes a winding needle, the winding needle including a first needle body and a second needle body, and the follow-cut winding method further includes:

[0023] When the winding mechanism moves to the preparatory position, the winding needle moves axially to avoid the first strip.

[0024] According to some embodiments of the present invention, the step of the winding mechanism following the first strip along the cutting path includes:

[0025] The coiling needle makes a first axial movement to allow the first strip of material to pass between the first needle body and the second needle body;

[0026] The winding mechanism performs a second movement along the conveying direction of the first strip so that the speed of the winding mechanism is the same as the conveying speed of the first strip;

[0027] Wherein, the first movement and the second movement are performed simultaneously, or the first movement is performed before the second movement.

[0028] According to some embodiments of the present invention, the winding mechanism further includes a rotary cutter located between the first needle body and the second needle body, the rotary cutter including a cutting edge and a clamping part, and the step of the winding mechanism cutting the first strip includes:

[0029] The rotary cutter rotates to bring the clamping part closer to the second needle body, and the clamping part and the second needle body clamp the first material strip;

[0030] The rotary cutter rotates to bring the blade closer to the first needle body, and the first needle body and the blade cut the first strip.

[0031] According to some embodiments of the present invention, the follow-up winding method further includes: [The text abruptly ends here, likely due to an incomplete sentence or missing information.]

[0032] Obtain a first offset, which refers to the offset of the second strip relative to the winding mechanism;

[0033] The winding mechanism is controlled to move in order to counteract the first offset.

[0034] According to some embodiments of the present invention, the first conveyor line includes two diaphragm conveying units and one first electrode conveying unit, and the follow-up winding method further includes:

[0035] The diaphragm conveying unit provides a diaphragm, and the first electrode conveying unit provides a first electrode.

[0036] Obtain a second offset, which refers to the offset of the diaphragm relative to the first electrode;

[0037] Control the movement of the diaphragm to counteract the second offset;

[0038] The two diaphragms are respectively attached to both sides of the first electrode to form the first material strip;

[0039] The first strip is sent to the cutting station.

[0040] According to some embodiments of the present invention, the step of feeding the first strip to the follow-up cutting station includes:

[0041] Cut the first material strip;

[0042] Apply protective adhesive to the cut location to reconnect the first strip;

[0043] The pasted first strip is sent to the follow-up cutting station;

[0044] In this process, when applying the protective adhesive, a gap is left between the two sections of the first strip, and the cutting position during the follow-up cutting step is consistent with the position of the gap.

[0045] The multi-station winding device provided by the present invention includes a winding line, a first conveyor line, a second conveyor line, and at least three winding mechanisms. The winding lines are connected end to end, and the winding lines include a cutting station and a winding station. The winding station is located downstream of the cutting station. The first conveyor line is used to convey a first strip to the cutting station, and the second conveyor line is used to convey a second strip to the winding station. The winding mechanisms are movable along the winding line.

[0046] The multi-station winding device provided by the present invention has at least the following technical effects: the multi-station winding device can use the follow-cut winding method provided by the present invention, so there is no need to stop the conveying of the first strip and the operation of the winding mechanism when cutting. The multi-station winding device can improve the continuity of the cell winding process, thereby helping to improve the efficiency of the winding process.

[0047] According to some embodiments of the present invention, the winding line further includes an adhesive application station and a material unloading station. The winding mechanism located at the follow-up cutting station can sequentially pass through the winding station, the adhesive application station, and the material unloading station to return to the follow-up cutting station. A finishing mechanism for finishing is installed between the winding station and the adhesive application station, and an adhesive application mechanism for applying adhesive is installed at the adhesive application station.

[0048] According to some embodiments of the present invention, the winding line further includes a material unloading station, and the winding mechanism located at the follow-up cutting station can sequentially pass through the winding station and the material unloading station to return to the follow-up cutting station. The winding station is equipped with a finishing and adhesive application mechanism for finishing and applying adhesive.

[0049] According to some embodiments of the present invention, the first conveying line includes two diaphragm conveying units and a first electrode conveying unit, wherein the diaphragm conveying units are used to provide diaphragms, the first electrode conveying unit is used to provide first electrodes, and the first conveying line is capable of attaching the two diaphragms to both sides of the first electrode to form the first strip.

[0050] According to some embodiments of the present invention, the first conveyor line includes a pre-cutting station for cutting the first strip and for forming a gap at the cut position of the first strip and applying protective adhesive.

[0051] According to some embodiments of the present invention, the winding mechanism includes a winding needle and a rotary cutter. The winding needle includes a first needle body and a second needle body, which are used to clamp the first strip. The rotary cutter is located between the first needle body and the second needle body. The rotary cutter includes a cutting edge and a clamping part. The cutting edge is adapted to the first needle body, and the clamping part is adapted to the second needle body. The rotary cutter is rotatable so that the cutting edge cuts the first strip, and the rotary cutter is rotatable so that the clamping part clamps the first strip.

[0052] According to some embodiments of the present invention, the winding mechanism is capable of extending and retracting along the axial direction for correction. Attached Figure Description

[0053] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0054] Figure 1 This is a schematic diagram of one embodiment of the multi-station winding device of the present invention;

[0055] Figure 2 This is a schematic diagram of another embodiment of the multi-station winding device of the present invention;

[0056] Figure 3 This is a schematic diagram of the winding mechanism of the present invention performing the follow-cut winding method;

[0057] Figure 4 This is a schematic diagram of the winding mechanism of the present invention performing the follow-cut winding method;

[0058] Figure 5 This is a schematic diagram of the winding mechanism of the present invention performing the follow-cut winding method;

[0059] Figure 6 This is a schematic diagram of the winding mechanism of the present invention performing the follow-cut winding method;

[0060] Figure 7 This is a schematic diagram of the winding mechanism of the present invention performing the follow-cut winding method;

[0061] Figure 8This is a schematic diagram of the winding mechanism of the present invention performing the follow-cut winding method;

[0062] Figure 9 This is a flowchart of the operation of the winding mechanism of the present invention;

[0063] Figure 10 This is a schematic diagram of the structure of the rotary cutter of the present invention;

[0064] Figure 11 This is a schematic diagram of yet another embodiment of the multi-station winding device of the present invention.

[0065] Figure label:

[0066] Winding mechanism 110, first needle body 111, second needle body 112, blade 113, clamping part 114, finishing mechanism 120, adhesive application mechanism 130, finishing adhesive application mechanism 140.

[0067] First feed strip 210, diaphragm 211, first electrode 212, second feed strip 220

[0068] The following stations are designated as follows: 310 for follow-up cutting, 311 for preparation, 312 for follow-up cutting, 320 for winding, 330 for applying adhesive, 340 for unloading, 360 for bonding, and 370 for pre-cutting. Detailed Implementation

[0069] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0070] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicating the orientation or work position relationship, are based on the orientation or work position relationship shown in the drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0071] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The terms "first," "second," "third," and "fourth," etc., are used to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features or the order of the indicated technical features. The terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0072] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0073] According to the following method provided by the present invention, the following method uses a winding line, a first conveying line, a second conveying line and at least three winding mechanisms 110 that move along the winding line. The winding line is connected end to end and includes a following station 310 and a winding station 320. The winding station 320 is located downstream of the following station 310.

[0074] The following are methods for follow-up cutting and winding:

[0075] The first conveyor line conveys the first material belt 210 to the cutting station 310, and the second conveyor line conveys the second material belt 220 to the winding station 320.

[0076] The winding mechanism 110 located at the winding station 320 acquires the second strip 220 and performs a winding action. The winding mechanism 110 located at the cutting station 310 moves to a preparatory position 311 that is compatible with the first strip 210.

[0077] When the winding mechanism 110 at the winding station 320 completes the winding action, the winding mechanism 110 at the follow-cutting station 310 performs the follow-cutting action.

[0078] After each winding mechanism 110 on the winding line completes its operation at its respective station, the winding mechanism 110 moves to the downstream station.

[0079] The step of performing the chasing and cutting action includes:

[0080] The winding mechanism 110, located in the preparatory position 311, moves along the tracing path following the first material belt 210, and the tracing path is consistent with the conveying path of the first material belt 210.

[0081] When the winding mechanism 110, which is performing the cutting action, is synchronized with the first material strip 210, the winding mechanism 110 cuts the first material strip 210 and obtains the first end of the first material strip 210 located behind the cut position.

[0082] According to the follow-cut winding method provided by the present invention, the winding mechanism 110 can follow-cut the first material strip 210. Therefore, it is not necessary to stop the conveying of the first material strip 210 and the operation of the winding mechanism 110 when cutting. The follow-cut winding method can improve the continuity of the cell winding process, thereby helping to improve the efficiency of the winding process.

[0083] Understandably, referring to Figure 6 The follow-cutting station 310 has a follow-cutting route. One end of the follow-cutting route is the preparatory position 311, and the other end of the follow-cutting route is the follow-cutting position 312. The winding mechanism 110 cuts the first material strip 210 at the follow-cutting position 312. The front and rear of the cutting position of the first material strip 210 are determined according to the conveying direction of the first material strip 210. The conveying direction is forward. When a winding mechanism 110 performs a follow-cutting action, the first material strip 210 is cut into two segments. The front segment is wound by the winding mechanism 110 currently performing the winding action, and the end of the other segment of the first material strip 210 is the beginning segment. The other segment of the first material strip 210 is obtained by the winding mechanism 110 performing the follow-cutting action and moved to the winding station 320 for winding. When the winding mechanism 110 performing the follow-cutting action moves to the winding station 320, the winding mechanism 110 upstream of the follow-cutting station 310 moves to the follow-cutting station 310, thereby completing the connection between different winding mechanisms 110.

[0084] When winding, refer to Figure 1 and Figure 2 The second strip 220 is fed in from the cutting point where the first strip 210 is wound. As the winding proceeds, the first strip 210 clamps the second strip 220, thereby obtaining the second strip 220.

[0085] When the second strip 220 fed into the winding mechanism 110 reaches a preset length, the second conveyor line cuts the second strip 220. The cutting of the second strip 220 by the second conveyor line is not limited to any particular method. For example, it can be a follow-up cutting method similar to the follow-up cutting action of the winding mechanism 110, or it can be a second conveyor line with a buffer station. The cut second strip 220 is fed into the buffer station for buffering. When the cutting of the second strip 220 needs to be stopped, the second strip 220 is conveyed from the buffer station to the winding station.

[0086] The battery cell includes a cathode sheet, an anode sheet, and a separator separating the cathode and anode sheets. In existing winding methods, the cathode sheet, anode sheet, and two separators need to be joined together before being sent to the winding mechanism 110. After being cut, the cathode and anode sheets are fed into the joining position by their respective feeding mechanisms. The feeding mechanisms correct the offset based on the deviation when feeding the cathode sheet and the anode sheet. Because the conveying route of the cathode and anode sheets is relatively long during feeding, and the feeding mechanisms are far from the joining and winding positions, the correction suffers from lag and inadequate response. Furthermore, the correction of the two feeding mechanisms may interfere with each other. Therefore, the existing winding method has the problem of poor alignment of the edges of the cathode sheet, anode sheet, and separators, resulting in defective battery cells after winding.

[0087] In the follow-up winding method of the present invention, the first material strip 210 is first sent to the winding mechanism 110, and then the second material strip 220 is sent to the winding mechanism 110. When the second material strip 220 is sent in, since the first material strip 210 is already in a wound state, its stability and controllability are good. The first material strip 210 can be controlled to perform the correction action according to the offset of the second material strip 220. Therefore, the offset when the second material strip 220 is sent in is easy to adjust and correct, which makes it easy to improve the quality of cell winding.

[0088] It is understandable that at this time, the first material strip 210 includes the first electrode 212, and the second material strip 220 includes the second electrode. One of the first electrode 212 and the second electrode is an anode and the other is a cathode.

[0089] Specifically, according to some embodiments of the present invention, the follow-up winding method further includes:

[0090] Obtain the first offset, which refers to the offset of the second strip 220 relative to the winding mechanism 110;

[0091] The winding mechanism 110 is controlled to move to counteract the first offset.

[0092] When implementing this invention, the first offset can be obtained with the help of components such as CCD or sensors.

[0093] Since the correction is directly performed by the winding mechanism 110 at this time, the correction position coincides with the winding position. The winding mechanism 110 clamps the first material strip 210 and corrects the deviation according to the offset of the second material strip 220, so that the first material strip 210 is adapted to the material position of the second material strip 220, thereby ensuring the alignment of the two side edges of the second material strip 210 and the first material strip 220. Therefore, it can solve the problems of correction lag and inadequate correction response, and improve the quality of the battery cell.

[0094] According to some embodiments of the present invention, the first conveyor line includes two diaphragm conveying units and a first electrode conveying unit, and the step of conveying the first material strip 210 to the follow-up cutting station includes:

[0095] The diaphragm conveying unit provides a diaphragm 211, and the first electrode conveying unit provides a first electrode 212;

[0096] Obtain the second offset, which refers to the offset of the diaphragm 211 relative to the first electrode 212;

[0097] Control the movement of diaphragm 211 to counteract the second offset;

[0098] Two diaphragms 211 are respectively attached to both sides of the first electrode 212 to form the first material strip 210;

[0099] The first material strip 210 is sent to the follow-up cutting station.

[0100] Understandably, in some current solutions, an electrode sheet is bonded to a separator 211. The resulting strip is relatively thin and has weak resistance to deformation. In other solutions, the electrode sheet needs to be cut by a feeding mechanism before being fed between the separators. After cutting, the electrode sheet is also thin and has weak resistance to deformation. This can easily lead to misalignment of the electrode head and tail, resulting in poor alignment between the electrode sheet and the separator. Furthermore, uneven stress and wrinkling can easily occur at the edges of the electrode sheet during transport, affecting the quality of the cell winding.

[0101] In some embodiments of the present invention, by bonding two diaphragms 211 to the first electrode 212, the thickness of the first strip 210 and its resistance to deformation are increased, making it less prone to wrinkling during transport. Simultaneously, the winding mechanism 110 can follow and cut the first strip 210, thus eliminating the need to pause the transport of the first strip 210 and the operation of the winding mechanism 110 during cutting. This follow-cut winding method improves the continuity of the cell winding process, thereby contributing to increased winding efficiency. Since the second strip 220 is fed in during winding, the transport distance is shorter, reducing the risk of wrinkling during transport.

[0102] The beneficial effects of this invention also lie in the fact that it eliminates the film-forming step in the prior art, so that the diaphragm 211 does not participate in film-forming and shortens the length of the diaphragm 211 at both ends; at the same time, it also eliminates a set of feeding mechanisms in the existing winding equipment. The first material strip 210 is fed through the acquisition and traction of the winding mechanism 110, ensuring the positional accuracy of the first material strip 210; by using the pre-bonded first material strip 210 and the second material strip 220 for winding, the first material strip 210 is bonded first and then cut, which can eliminate the problem in the prior art where the first electrode 212, which is not bonded, is prone to head and tail offset after feeding and cutting, resulting in poor alignment between the first electrode 212 and the diaphragm 211, thus improving the alignment between the first electrode 212 and the diaphragm 211.

[0103] The battery cell manufacturing process also includes finishing, adhesive application, and unloading actions. The finishing action involves pressing down the end of the battery cell to prevent it from unwinding while the winding mechanism 110 continues to rotate to wind up the end. The adhesive application action involves applying finishing adhesive to the end of the finished battery cell to prevent it from unwinding. The unloading action involves removing the battery cell from the winding mechanism 110. The finishing action should precede the cutting of the first strip 210 by the next winding mechanism 110. That is, while the current winding mechanism 110 is winding, the next winding mechanism 110 begins its cutting action; the cutting of the first strip 210 only begins after the current winding mechanism 110 has finished finishing and pressed down the end of the battery cell. Depending on the specific design, the winding, finishing, adhesive application, and unloading actions can be performed at the same station or at different stations.

[0104] In some embodiments, the winding line further includes an adhesive application station 330 and a blanking station 340. The winding mechanism 110 located at the follow-up cutting station 310 can sequentially pass through the winding station 320, the adhesive application station 330, and the blanking station 340 back to the follow-up cutting station 310. The follow-up cutting winding method further includes:

[0105] When the winding mechanism 110 moves from the winding station 320 to the adhesive application station 330, it performs a finishing action on the first material strip 210 and the second material strip 220.

[0106] When the winding mechanism 110 moves to the adhesive application station 330, it performs the adhesive application action.

[0107] When the winding mechanism 110 moves to the unloading station 340, it performs the unloading action.

[0108] In current winding methods, different actions are sequential. When the winding mechanism 110 switches between different stations, it does not perform any other actions besides moving. This invention, by making the finishing action parallel to the movement of the winding mechanism 110 from the winding station 320 to the adhesive application station 330, effectively shortens the time required for the battery cell manufacturing process.

[0109] In some other embodiments, the winding line also includes a blanking station 340, and the winding mechanism 110 located at the follow-up cutting station 310 can sequentially pass through the winding station 320 and the blanking station 340 to return to the follow-up cutting station 310. The follow-up cutting winding method further includes:

[0110] After the winding mechanism 110 completes the winding action, it performs the finishing action and the adhesive application action.

[0111] When the winding mechanism 110 moves to the unloading station 340, it performs the unloading action.

[0112] By integrating the winding, finishing, and adhesive application actions into the winding station 320, the time required for the winding mechanism 110 to move from the winding station 320 to the adhesive application station 330 can be saved, thereby shortening the time required for the battery cell manufacturing process.

[0113] Reference Figure 1 , Figure 2 and Figure 11 The winding line can have a variety of route layouts.

[0114] In some embodiments, the winding mechanism 110 located at the cutting station 310 performs a pre-winding operation as it moves to the winding station 320. During pre-winding, the winding mechanism 110 first winds several turns of the first strip 210, thereby further shortening the time required for the cell manufacturing process.

[0115] According to some embodiments of the present invention, the unloading station 340 includes a buffer area, in which the winding mechanism 110 that completes the unloading action is buffered. When the winding mechanism 110 located at the follow-up cutting station 310 moves to the winding station 320, the winding mechanism 110 in the buffer area moves to the follow-up cutting station 310.

[0116] The buffer area is suitable for embodiments where the number of winding mechanisms 110 exceeds the number of functional stations in the winding equipment. Depending on the number of winding mechanisms 110 used in the follow-up winding method, one or more winding mechanisms 110 can wait in the buffer area, and each winding mechanism 110 leaves the buffer area in a set order. The design of the buffer area enables the follow-up winding method to be applicable to situations with more winding mechanisms 110.

[0117] Of course, the set order does not necessarily have to be the same as the order in which the winding mechanism 110 enters the buffer area. For example, there can be multiple buffer positions in the buffer area. Different winding mechanisms 110 stay at their respective set buffer positions after the material is unloaded. When needed, the winding mechanism 110 that is sent to the follow-up cutting station 310 is selected according to the buffer position.

[0118] According to some embodiments of the present invention, after the battery cell on the winding mechanism 110 of the unloading station 340 is removed, it can be directly moved to the preparatory position of the follow-up cutting station 310.

[0119] According to some embodiments of the present invention, the winding mechanism 110 includes a winding needle, the winding needle including a first needle body 111 and a second needle body 112, and the follow-up winding method further includes:

[0120] When the winding mechanism 110 moves to the ready position, the winding needle moves away from the first material strip 210 to avoid the first material strip 210.

[0121] The follow-up cutting route is a section of the route where the movement of the winding mechanism 110 overlaps with the conveying route of the first material strip 210. The preparatory position 311 is the starting point of the follow-up cutting route. The winding mechanism 110 moves from the unloading station 340 and avoids interference when it reaches the preparatory position. This avoids interfering with the winding mechanism 110 moving from the original follow-up cutting station 310 to the winding station 320 to wind the first material strip 210 and feed the second material strip 220. As a result, the movement of the winding mechanism 110 to the preparatory position can be carried out in parallel with the process of the previous winding mechanism 110 winding the first material strip 210, thereby further shortening the time required for the cell manufacturing process.

[0122] The movement away from the first material strip 210, that is, the avoidance movement of the first material strip 210, can take many forms, such as the first needle body 111 and the second needle body 112 turning outward, the first needle body 111 and the second needle body 112 folding, the first needle body 111 and the second needle body 112 retracting along the axis of the coiled needle, etc.

[0123] In some embodiments, the step of the winding mechanism 110 following the movement of the first strip 210 includes:

[0124] The winding needle makes a first movement toward the first material strip 210 so that the first material strip 210 passes between the first needle body 111 and the second needle body 112;

[0125] The winding mechanism 110 performs a second movement along the conveying direction of the first material belt 210 so that the speed of the winding mechanism 110 is the same as the conveying speed of the first material belt 210;

[0126] In this case, the first movement and the second movement occur simultaneously, or the first movement occurs before the second movement.

[0127] The first movement can be an extension, which causes the winding needle, which was originally avoiding the first material strip 210, to approach the first material strip 210 and reach a pre-clamping state that can clamp the first material strip 210. The second movement causes the speed of the winding mechanism 110 to catch up with the speed of the first material strip 210, and the winding mechanism 110 clamps the first material strip 210, so that the cutting positions of the winding mechanism 110 and the first material strip 210 remain relatively stationary.

[0128] The simultaneous execution of the first and second movements can further increase the cutting speed, which helps to improve the efficiency of the winding process. Meanwhile, after the winding mechanism 110 clamps the first strip 210, it can begin the correction action to prepare for acquiring the second strip 220. In other words, the correction action and pre-winding action of the winding mechanism 110 can be performed in parallel.

[0129] In some embodiments, the winding mechanism 110 further includes a rotary cutter located between the first needle body 111 and the second needle body 112. The rotary cutter includes a cutting edge 113 and a clamping part 114. The step of the winding mechanism 110 cutting the first strip 210 includes:

[0130] The rotating cutter rotates to bring the clamping part 114 close to the second needle body 112, and the clamping part 114 and the second needle body 112 clamp the first material strip 210;

[0131] The rotating cutter rotates to bring the blade 113 close to the first needle body 111, and the first needle body 111 and the blade 113 cut the first strip 210.

[0132] Reference Figure 10 The first needle body 111 includes a fixed cutting blade, and the second needle body 112 includes a clamping block. First, the clamping part 114 and the clamping block clamp the first material strip 210, limiting its position and preventing movement during cutting. Then, the blade 113 and the fixed cutting blade work together to cut the first material strip 210. By placing the rotary cutter inside the winding needle, the volume of the winding mechanism 110 is effectively reduced, contributing to a more compact winding layout. Simultaneously, the rotary cutter has a cavity in the middle, which can serve as a flow channel for blowing or sucking dust, thereby increasing the cross-sectional area of ​​the flow channel and improving dust removal efficiency compared to traditional straight-line cutters. The clamping part 114 and / or the clamping block are elastic, avoiding rigid contact and reducing damage to the first material strip 210 during clamping. Furthermore, as the rotary cutter rotates, the clamping part 114 and / or the clamping block deform, preventing obstruction of the blade 113's movement. The rotary cutter integrates clamping and cutting, ensuring the sequential order of the two actions.

[0133] In some embodiments, the step of feeding the first strip 210 to the follow-up cutting station includes:

[0134] Cut the first material strip 210;

[0135] Apply protective adhesive to the cut location to reconnect the first strip 210;

[0136] Send the pasted first strip 210 to the follow-up cutting station;

[0137] In the process of applying protective adhesive, a gap is left between the two sections of the first strip 210, and the cutting position in the follow-up cutting step is consistent with the position of the gap.

[0138] In some current winding methods, to prevent the chips and burrs generated when the winding mechanism 110 cuts the first strip 210 from piercing the diaphragm 211 or the first electrode 212, and to prevent the chips from contaminating the winding mechanism 110, protective adhesive is applied to the cutting position before cutting. The resulting chips and burrs are then held in place by the adhesive and will not pierce the diaphragm 211 or the first electrode 212 during subsequent winding. However, this method still generates chips and burrs, and therefore still poses certain risks.

[0139] This invention adds a pre-cutting step during the conveying of the first material strip 210 to pre-cut the first material strip 210. When the winding mechanism 110 cuts, it only needs to cut the protective adhesive from the gap position. Therefore, the winding mechanism 110 will not cut into the diaphragm 211 or the first electrode 212 during the second cut, avoiding the generation of chips in the diaphragm 211 or the first electrode 212 during the second cut. In addition, the pre-cutting step cuts first and then applies the protective adhesive, so the chips generated during the cut will remain on the first conveying line, and the burrs generated will be stuck by the protective adhesive, which will not easily affect the subsequent winding.

[0140] In some embodiments, when the second conveyor line conveys the second material belt 220, protective adhesive may be applied to the second material belt 220, and then the second material belt 220 may be cut after application.

[0141] The multi-station winding device provided by the present invention includes a winding line, a first conveyor line, a second conveyor line, and at least three winding mechanisms 110. The winding lines are connected end to end, and the winding lines include a cutting station 310 and a winding station 320. The winding station 320 is located downstream of the cutting station 310. The first conveyor line is used to convey a first material strip 210 to the cutting station, and the second conveyor line is used to convey a second material strip 220 to the winding station. The winding mechanisms 110 are movable along the winding line.

[0142] The multi-station winding device provided by this invention can be used to execute the follow-cut winding method provided by this invention. Therefore, it is not necessary to pause the conveying of the first strip and the operation of the winding mechanism when cutting. The multi-station winding device can improve the continuity of the cell winding process, thereby helping to improve the efficiency of the winding process.

[0143] In some embodiments, refer to Figure 2The winding line also includes a material unloading station 340. The winding mechanism 110 located at the follow-up cutting station 310 can pass through the winding station 320 and the material unloading station 340 in sequence and return to the follow-up cutting station 310. The winding station 320 is equipped with a finishing and adhesive application mechanism 140 for finishing and applying adhesive.

[0144] In some embodiments, refer to Figure 1 The winding line also includes an adhesive application station 330 and a blanking station 340. The winding mechanism 110 located at the follow-up cutting station 310 can sequentially pass through the winding station 320, the adhesive application station 330 and the blanking station 340 back to the follow-up cutting station 310. A finishing mechanism 120 for finishing is installed between the winding station 320 and the adhesive application station 330. An adhesive application mechanism 130 for applying adhesive is installed at the adhesive application station 330.

[0145] In some embodiments, the first conveyor line includes two diaphragm conveying units and one first electrode conveying unit. The diaphragm conveying units provide diaphragms 211, and the first electrode conveying unit provides a first electrode 212. The first conveyor line is capable of bonding the two diaphragms 211 to both sides of the first electrode 212 to form a first strip 210. The first conveyor line may include a bonding station 360 and a pre-cutting station 370. The bonding station 360 completes the bonding of the diaphragms 211 and the first electrode 212, and the pre-cutting station 370 completes the pre-cutting of the first strip 210 and the application of protective adhesive.

[0146] In some embodiments, the winding mechanism 110 includes a winding needle and a rotary cutter. The winding needle includes a first needle body 111 and a second needle body 112. The rotary cutter is located between the first needle body 111 and the second needle body 112. The first strip 210 can pass through the winding needle between the first needle body 111 and the second needle body 112. The rotary cutter includes a cutting edge 113 and a clamping part 114. The cutting edge 113 is adapted to the first needle body 111, and the clamping part 114 is adapted to the second needle body 112. The rotary cutter can rotate to cut the first strip 210 with the cutting edge 113 and to clamp the first strip 210 with the clamping part 114.

[0147] In some embodiments, the winding mechanism 110 can extend and retract along the axial direction for correction. For example, the winding needle is mounted on a guide rail, and the winding needle extends or retracts along the guide rail, with a rotating cutter built into the winding needle extending or retracting along with the winding needle. Of course, the winding mechanism 110 can also use an external cutter, with the external cutter extending or retracting separately from the winding needle.

[0148] The multi-station winding apparatus also includes functional modules and beneficial effects corresponding to the follow-cut winding method provided in any embodiment of the present invention. Technical details not described in detail in the above embodiments can be found in the follow-cut winding method provided in any embodiment of this application.

[0149] The following is for reference. Figures 1 to 11 The following describes in detail the following specific embodiments the follow-up winding method and multi-station winding apparatus provided according to the present invention. It should be explained that, in Figures 3 to 8 In the diagram, the dashed lines representing the winding mechanism 110 and the solid lines representing the winding mechanism 110 indicate that they are located on different planes, thereby enabling the winding mechanism 110 to spatially avoid the first strip 210. It is important to understand that the following description is merely illustrative and not a specific limitation of the invention.

[0150] Example 1:

[0151] Reference Figure 1 as well as Figure 10 The multi-station winding device includes a winding line, a first conveyor line, a second conveyor line, and four winding mechanisms 110. The winding lines are connected end to end and include a sequentially arranged cutting station 310, a winding station 320, an adhesive application station 330, and a material unloading station 340. A finishing mechanism 120 is installed between the winding station 320 and the adhesive application station 330, and an adhesive application mechanism 130 is installed at the adhesive application station 330.

[0152] The first conveyor line is used to convey the first material strip 210 to the cutting station 310, and the second conveyor line is used to convey the second material strip 220 to the winding station 320. The first conveyor line includes a first material preparation station, a bonding station 360, and a pre-cutting station 370 arranged in sequence. The first material preparation station includes two diaphragm conveying units and a first electrode conveying unit. The second conveyor line includes a second material preparation station and a cutting station arranged in sequence. The second material preparation station includes a second electrode conveying unit.

[0153] The winding mechanism 110 includes a winding needle and a rotary cutter. The winding needle includes a first needle body 111 and a second needle body 112. The rotary cutter is located between the first needle body 111 and the second needle body 112. A first strip 210 can pass through the winding needle between the first needle body 111 and the second needle body 112. The rotary cutter includes a cutting edge 113 and a clamping part 114. The winding mechanism 110 is retractable to avoid the first strip 210. The winding mechanism 110 located at the follow-up cutting station 310 can sequentially pass through the winding station 320, the adhesive application station 330, and the unloading station 340 back to the follow-up cutting station 310.

[0154] Reference Figures 3 to 9 The multi-station winding device is used according to the following follow-up winding method:

[0155] The first conveyor line conveys the first material belt 210 to the cutting station 310, and the second conveyor line conveys the second material belt 220 to the winding station 320.

[0156] The winding mechanism 110 located at the winding station 320 acquires the second material strip 220 and performs a winding operation;

[0157] The winding mechanism 110 located at the follow-up cutting station 310 moves to a ready position that is compatible with the first strip 210;

[0158] The winding mechanism 110 located at the adhesive application station 330 performs the adhesive application action;

[0159] The winding mechanism 110 located at the unloading station 340 performs the unloading action;

[0160] When the winding mechanism 110 at the winding station 320 completes the winding action, the winding mechanism 110 at the follow-cutting station 310 performs the follow-cutting action.

[0161] After each winding mechanism 110 on the winding line completes its operation at its respective station, the winding mechanism 110 moves to the downstream station.

[0162] When the winding mechanism 110 located at the cutting station 310 moves to the winding station 320, it performs a pre-winding action;

[0163] When the winding mechanism 110 located at the winding station 320 moves to the adhesive application station 330, it performs a finishing action;

[0164] When the winding mechanism 110 located at the unloading station 340 moves to the cutting station 310, the winding needle retracts axially to avoid the first material strip 210.

[0165] The step of conveying the first conveyor belt 210 to the receiving station 310 also includes:

[0166] The diaphragm conveying unit provides a diaphragm 211, and the first electrode conveying unit provides a first electrode 212;

[0167] Obtain the second offset, which refers to the offset of the diaphragm 211 relative to the first electrode 212;

[0168] Control the movement of diaphragm 211 to counteract the second offset;

[0169] Two diaphragms 211 are respectively attached to both sides of the first electrode 212 to form the first material strip 210;

[0170] Cut the first material strip 210;

[0171] Apply protective adhesive to the cut location to reconnect the first strip 210;

[0172] Send the pasted first strip 210 to the follow-up cutting station;

[0173] In the process of applying protective adhesive, a gap is left between the two sections of the first strip 210, and the cutting position in the follow-up cutting step is consistent with the position of the gap.

[0174] The follow-up winding method also includes:

[0175] Obtain the first offset, which refers to the offset of the second strip 220 relative to the winding mechanism 110;

[0176] Control the movement of the winding mechanism 110 to counteract the first offset;

[0177] When the length of the second material strip 220 conveyed to the winding mechanism 110 reaches a preset value, the second conveyor line cuts the second material strip 220.

[0178] The step of performing the follow-up cut also includes:

[0179] The needle extends axially so that the first strip 210 passes between the first needle body 111 and the second needle body 112;

[0180] The winding mechanism 110 performs a second movement along the conveying direction of the first material belt 210 so that the speed of the winding mechanism 110 is the same as the conveying speed of the first material belt 210;

[0181] When the winding mechanism 110 is synchronized with the first strip 210, the winding mechanism 110 cuts the first strip 210 and the winding mechanism 110 obtains the first strip 210 located behind the cut position.

[0182] In this process, the first and second movements occur simultaneously.

[0183] Example 2:

[0184] Reference Figure 2 The difference between Embodiment 2 and Embodiment 1 is that Embodiment 2 integrates the winding, finishing, and adhesive application actions into the winding station 320. The winding line also includes a material unloading station 340. The winding mechanism 110 located at the follow-up cutting station 310 can sequentially pass through the winding station 320 and the material unloading station 340 back to the follow-up cutting station 310. The winding station 320 is equipped with a finishing and adhesive application mechanism 140 for finishing and applying adhesive. Embodiment 2 includes three winding mechanisms 110, and Embodiment 2 replaces the rotating cutter of the winding mechanism 110 with an external cutter. When the winding mechanism 110 extends and retracts, the external cutter and the winding needle extend and retract separately. After the external cutter completes the cutting of the first strip 210, it can retract first.

[0185] Example 3:

[0186] Reference Figure 11 The difference between Embodiment 3 and Embodiment 1 is that Embodiment 3 uses an external cutter and adjusts the routing of the winding line. When the winding mechanism 110 extends and retracts, the external cutter and the winding needle extend and retract separately.

[0187] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0188] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for tracing and winding, characterized in that: The follow-cut winding method uses a winding line, a first conveyor line, a second conveyor line, and at least three winding mechanisms that move along the winding line, the winding line being connected end to end, the winding line including a follow-cutting station and a winding station, the winding station being located downstream of the follow-cutting station; The following are methods for follow-up cutting and winding: The first conveyor line conveys the first strip to the cutting station, and the second conveyor line conveys the second strip to the winding station; the winding mechanism located at the winding station acquires the second strip and performs a winding action, and the winding mechanism located at the cutting station moves to a preparatory position that matches the first strip. When the winding mechanism at the winding station completes the winding action, the winding mechanism at the cutting station performs the cutting action. After each winding mechanism on the winding line completes its operation at its respective station, the winding mechanism moves to the downstream station. The step of performing the chasing and cutting action includes: The winding mechanism, located in the preparatory position, moves along the cutting path following the first material strip, and the cutting path is consistent with the conveying path of the first material strip; When the winding mechanism performing the cutting action is synchronized with the first material strip, the winding mechanism cuts the first material strip and obtains the first end of the first material strip located behind the cut position.

2. The method for follow-up cutting and winding according to claim 1, characterized in that, The winding line further includes an adhesive application station and a blanking station. The winding mechanism located at the follow-up cutting station can sequentially pass through the winding station, the adhesive application station, and the blanking station to return to the follow-up cutting station. The follow-up cutting winding method further includes: When the winding mechanism moves from the winding station to the adhesive application station, it performs a finishing action on the first material strip and the second material strip. When the winding mechanism moves to the adhesive application station, it performs the adhesive application action. The winding mechanism performs the unloading action when it moves to the unloading station.

3. The method for follow-up cutting and winding according to claim 1, characterized in that, The winding line also includes a feeding station, and the winding mechanism located at the follow-up cutting station can sequentially pass through the winding station and the feeding station to return to the follow-up cutting station. The follow-up cutting winding method further includes: After completing the winding action, the winding mechanism performs a finishing action and an adhesive application action. The winding mechanism performs the unloading action when it moves to the unloading station.

4. The method for follow-up cutting and winding according to claim 1, characterized in that, When the winding mechanism located at the cutting station moves toward the winding station, it performs a pre-winding action.

5. The method for follow-up cutting and winding according to claim 1, characterized in that, The winding mechanism includes a winding needle, which includes a first needle body and a second needle body. The follow-up winding method further includes: When the winding mechanism moves to the preparatory position, the winding needle moves axially to avoid the first strip.

6. The method for follow-up cutting and winding according to claim 5, characterized in that, The step of the winding mechanism following the first strip along the cutting path includes: The coiling needle makes a first axial movement to allow the first strip of material to pass between the first needle body and the second needle body; The winding mechanism performs a second movement along the conveying direction of the first strip so that the speed of the winding mechanism is the same as the conveying speed of the first strip; Wherein, the first movement and the second movement are performed simultaneously, or the first movement is performed before the second movement.

7. The following method for follow-up cutting and winding according to claim 5, characterized in that: The winding mechanism further includes a rotary cutter located between the first needle body and the second needle body. The rotary cutter includes a cutting edge and a clamping part. The step of the winding mechanism cutting the first strip includes: The rotary cutter rotates to bring the clamping part closer to the second needle body, and the clamping part and the second needle body clamp the first material strip; The rotary cutter rotates to bring the blade closer to the first needle body, and the first needle body and the blade cut the first strip.

8. The method for follow-up cutting and winding according to claim 1, characterized in that, The follow-up winding method also includes: Obtain a first offset, which refers to the offset of the second strip relative to the winding mechanism; The winding mechanism is controlled to move in order to counteract the first offset.

9. The method for follow-up cutting and winding according to claim 1, characterized in that, The first conveyor line includes two diaphragm conveying units and one first electrode conveying unit, and the follow-up winding method further includes: The diaphragm conveying unit provides a diaphragm, and the first electrode conveying unit provides a first electrode. Obtain a second offset, which refers to the offset of the diaphragm relative to the first electrode; Control the movement of the diaphragm to counteract the second offset; The two diaphragms are respectively attached to both sides of the first electrode to form the first material strip; The first strip is sent to the cutting station.

10. The method for follow-up cutting and winding according to claim 9, characterized in that, The step of sending the first strip to the follow-up cutting station includes: Cut the first material strip; Apply protective adhesive to the cut location to reconnect the first strip; The pasted first strip is sent to the cutting station; In this process, when applying the protective adhesive, a gap is left between the two sections of the first strip, and the cutting position during the follow-up cutting step is consistent with the position of the gap.

11. A multi-station winding device, characterized in that, include: A winding line, the winding line being connected end to end, the winding line including a cutting station and a winding station, the winding station being located downstream of the cutting station; A first conveyor line is used to convey a first material strip to the cutting station; A second conveyor line is used to convey a second strip of material to the winding station; At least three winding mechanisms, which are movable along the winding line; The winding mechanism located at the cutting station is configured to move to a preparatory position adapted to the first strip; When the winding mechanism at the winding station completes the winding action, the winding mechanism at the preparatory position moves along the cutting path to follow the first material strip, and the cutting path is consistent with the conveying path of the first material strip.

12. The multi-station winding device according to claim 11, characterized in that: The winding line also includes an adhesive application station and a material unloading station. The winding mechanism located at the follow-up cutting station can sequentially pass through the winding station, the adhesive application station, and the material unloading station to return to the follow-up cutting station. A finishing mechanism for finishing is installed between the winding station and the adhesive application station, and an adhesive application mechanism for applying adhesive is installed at the adhesive application station.

13. The multi-station winding device according to claim 11, characterized in that: The winding line also includes a material unloading station. The winding mechanism located at the follow-up cutting station can pass through the winding station and the material unloading station in sequence and return to the follow-up cutting station. The winding station is equipped with a finishing and adhesive application mechanism for finishing and applying adhesive.

14. The multi-station winding device according to claim 11, characterized in that: The first conveyor line includes two diaphragm conveying units and a first electrode conveying unit. The diaphragm conveying units are used to provide diaphragms, and the first electrode conveying unit is used to provide first electrodes. The first conveyor line is capable of attaching the two diaphragms to both sides of the first electrode to form the first material strip.

15. The multi-station winding device according to claim 14, characterized in that: The first conveyor line includes a pre-cutting station for cutting the first material strip and for forming a gap at the cut position of the first material strip and applying protective adhesive.

16. The multi-station winding device according to claim 11, characterized in that: The winding mechanism includes a winding needle and a rotary cutter. The winding needle includes a first needle body and a second needle body, which are used to clamp the first strip. The rotary cutter is located between the first needle body and the second needle body. The rotary cutter includes a cutting edge and a clamping part. The cutting edge is adapted to the first needle body, and the clamping part is adapted to the second needle body. The rotary cutter can rotate to cut the first strip with the cutting edge, and the rotary cutter can rotate to press the first strip with the clamping part.

17. The multi-station winding device according to claim 11, characterized in that: The winding mechanism can extend and retract along the axial direction to correct deviation.

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