Pole piece taping device and pole piece die cutting equipment

Abstract

The present application discloses a pole piece splicing device and pole piece die-cutting equipment, which relate to the field of battery production technology, wherein the pole piece splicing device includes a glue carrier and two splicing parts, the glue carrier has a glue carrier surface, and the glue carrier surface is used to position and load the adhesive tape; the splicing part is used to pick up the end of the pole piece tape, and at least one of the two splicing parts is set as a winding roller, which is used to wind the corresponding pole piece tape; the glue carrier and the two splicing parts can be located at the splicing station correspondingly, and the two splicing parts can respectively abut against the glue carrier surface and be spaced apart, and the winding roller can be reversed near another splicing part. The technical solution provided by the present application utilizes two splicing parts in combination with the glue carrier to replace manual splicing of two pole piece tapes, and the winding roller can also use its own reversal to stably stick the tape to the adhesive tape, thereby improving the reliability of the splicing and reducing the risk of the pole piece tape breaking.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a pole piece taping device and a pole piece die-cutting device. Background Art

[0002] In the production process of lithium-ion batteries, after the coating and drying steps, the electrode material tape needs to be cut into specific sizes and shapes by die-cutting equipment. In the die-cutting equipment, the electrode material tape is usually fed to the tape transport mechanism in the form of a roll. After a roll of electrode material tape is unrolled and emptied, the electrode material tape on the tape transport mechanism needs to be connected to the full electrode material tape by adhesive tape to ensure continuous feeding to the tape transport mechanism. However, most of the existing die-cutting equipment uses manual splicing, and the reliability of manual splicing is poor. The adhesive tape is easy to fall off, resulting in a high risk of the electrode material tape breaking. Utility Model Content

[0003] The main purpose of the present application is to propose a pole piece splicing device and a pole piece die-cutting device, aiming to improve the problem of poor reliability of the manual splicing method of the material strip in the existing die-cutting equipment.

[0004] In a first aspect, the pole piece tape connection device proposed in the present application is used to connect two pole piece strips, the pole piece tape connection device has a tape connection station, and the pole piece tape connection device includes:

[0005] The adhesive carrying portion has an adhesive carrying surface, and the adhesive carrying surface is used to position and load the adhesive tape; and

[0006] Two tape connecting parts, the tape connecting parts are used to pick up the end of the pole piece material tape, at least one of the two tape connecting parts is set as a tape winding roller, and the tape winding roller is rotatably set to wind the corresponding pole piece material tape;

[0007] Wherein, at least part of the glue carrying portion and the two tape connecting portions can be movably arranged in a direction close to the tape connecting station, so that the glue carrying portion and the two tape connecting portions can be located at the tape connecting station correspondingly;

[0008] At the tape connection station, the two tape connection parts and the adhesive carrier part have a relative movable stroke, so that the two tape connection parts are respectively abutted against the adhesive carrier surface, and the ends of the two electrode strips are adhered to the adhesive tape;

[0009] At the tape splicing station, the two tape splicing parts are spaced apart along the length direction of the adhesive carrier surface, wherein the tape winding roller can be reversed close to the other tape splicing part to release the corresponding electrode material tape and unfold it to adhere to the adhesive tape.

[0010] The technical solution provided by the present application is that the glue carrying surface of the glue carrying part can be positioned to load the adhesive tape, and the two connecting parts can pick up the end parts of the two pole piece tapes respectively. Since the glue carrying part and the two connecting parts can at least partially move in the direction close to the connecting station, and the two connecting parts and the glue carrying part have a relative movable stroke, the adhesive tape can be bonded to the two pole piece tapes at the connecting station, and the two connecting parts are used in combination with the action of the glue carrying part to replace the manual connection operation of the two pole piece tapes. Not only that, the winding rollers in the two connecting parts can wind a certain length of the pole piece tape when picking up the pole piece tape, and can also use their own reversal in the bonding stage to gradually release the pole piece tape and stick it to the adhesive tape. This roller bonding method can ensure the bonding firmness between the pole piece tape and the adhesive tape, improve the reliability of the connection, and reduce the risk of the pole piece tape breaking.

[0011] In some embodiments, the electrode tape connection device further comprises a glue taking station, a first glue drawing station and a second glue drawing station, wherein the first glue drawing station and the second glue drawing station are respectively located at opposite sides of the glue taking station;

[0012] The pole piece connecting device also includes:

[0013] A rotatably arranged adhesive supply roller, the adhesive supply roller being used for unwinding and providing the adhesive tape; and

[0014] The adhesive drawing unit moves between the first adhesive drawing station and the second adhesive drawing station to pick up the adhesive tape on the adhesive supply roller at the first adhesive drawing station and draw the adhesive tape to the second adhesive drawing station;

[0015] The adhesive carrier moves between the adhesive taking station and the tape splicing station to position and load the adhesive tape at the adhesive taking station and transfer the adhesive tape to the tape splicing station.

[0016] Among them, the rotatable glue supply roller can continuously unwind and supply adhesive tape to the first glue drawing station, and the glue drawing part moves between the first glue drawing station and the second glue drawing station, and can pull the adhesive tape at the first station to the second glue drawing station, so that the adhesive tape can pass through the glue taking station, and the glue carrying part can position and load the adhesive tape at the glue taking station, and transport it to the tape splicing station, thereby realizing the continuous and automatic supply of adhesive tape, so that the adhesive tape supply frequency of the glue carrying part can be adapted to the picking frequency of the pole piece tapes of the two tape splicing parts, thereby ensuring the efficient splicing operation.

[0017] In some embodiments, the electrode tape connection device further includes a limiting portion, which is disposed at the first glue drawing station and is used to limit and fix or loosen the adhesive tape pulled from the glue supply roller;

[0018] The adhesive drawing unit draws the adhesive tape from the limiting portion at the first adhesive drawing station.

[0019] Among them, when the glue pulling part picks up the adhesive tape extending from the limiting part at the first glue pulling station, the limiting part will change from a fixed state to a loose state, so that the glue pulling part can pull the adhesive tape to the second glue pulling station. When the glue pulling part pulls the adhesive tape to the second glue pulling station, the limiting part will change from a loose state back to a fixed state, thereby re-fixing the adhesive tape, so that after a section of adhesive tape at the glue taking station is cut off and taken away, the adhesive tape at the first glue pulling station can be stably maintained on the limiting part, which is convenient for the subsequent cycle picking up by the glue pulling part. Through the setting of the limiting part, the accuracy of picking up the adhesive tape by the glue pulling part can be greatly improved.

[0020] In some embodiments, the electrode tape connection device further includes a glue cutting portion, which can be located corresponding to the glue taking station and is used to cut the adhesive tape after the adhesive carrying surface of the adhesive carrying portion is positioned and loaded with the adhesive tape at the glue taking station.

[0021] Among them, through the setting of the glue cutting part, the adhesive tape can be automatically cut off after the adhesive tape is positioned and loaded on the adhesive surface of the adhesive carrier, so as to ensure that the adhesive carrier can smoothly leave the adhesive taking station. Compared with the manual glue cutting method, the setting of the glue cutting part can accurately coordinate the glue taking timing of the adhesive carrier, thereby completing the glue cutting operation continuously and efficiently.

[0022] In some embodiments, the adhesive cutting portion is disposed on a side of the adhesive carrying portion adjacent to the adhesive carrying surface, and the adhesive cutting portion can be telescopically movable in the direction of the adhesive carrying surface to cut the adhesive tape.

[0023] Among them, the glue cutting part is arranged on the glue carrying part and can move with the glue carrying part. When the glue carrying part moves to the glue taking station and positions and loads the adhesive tape, the glue cutting part can automatically cut the adhesive tape, which is convenient for the glue carrying part to quantitatively intercept the adhesive tape. At the same time, the glue cutting part can be telescopically moved for cutting. Its structure is relatively simple, which is convenient for relying on the glue carrying part as the installation basis, and can reduce the installation space occupied on the electrode die-cutting equipment.

[0024] In some embodiments, the pole piece tape splicing device further comprises a first material taking station and a second material taking station, and the first material taking station and the second material taking station are arranged away from the tape splicing station;

[0025] The two connecting parts include:

[0026] A first tape splicing unit is movable between the first material taking station and the tape splicing station, and is used to take the tail end of the pole piece tape on the tape roller at the first material taking station and pull it to the tape splicing station; and

[0027] The second tape splicing part moves between the second material taking station and the tape splicing station, and is used for taking the head end of the pole piece tape on the full material feeding roller at the second material taking station and pulling it to the tape splicing station.

[0028] Among them, the first splicing part can be used to move between the first material picking station and the splicing station to pick up the tail end of the pole piece tape on the tape feeding roller and pull it to the splicing station by means of the movement of the first splicing part between the second material picking station and the splicing station, so as to pick up the head end of the pole piece tape on the full material feeding roller and pull it to the splicing station, thereby realizing the automatic receiving and transfer of two pole piece tapes to be connected, improving the degree of automation, and improving the splicing efficiency of the pole piece tapes.

[0029] In some embodiments, the adhesive carrying surface of the adhesive carrying portion is provided with a plurality of vacuum adsorption holes.

[0030] Among them, the adhesive carrier adopts vacuum adsorption to position and load the adhesive tape. There is no need to reserve extra area for the adhesive tape to be held by the pressing mechanism, and there will be no excess adhesive tape left on the side of the width direction of the electrode material strip. The impact on the tape roller is small, and it is easier and more efficient to fix and release the adhesive part by vacuum adsorption.

[0031] In some embodiments, the winding roller includes two clamping parts, which are arranged opposite to each other in the rotation radial direction of the winding roller and can move close to each other to clamp the pole piece strip therebetween.

[0032] Among them, the winding roller clamps the pole piece material strip through two clamping parts, which is a mechanical fixing method. The two clamping parts can make the clamping force applied larger, which is sufficient to stably clamp the pole piece material strip and reduce the probability of the pole piece material strip falling off the winding roller.

[0033] In a second aspect, the present application also proposes a pole piece die-cutting device, which includes the pole piece taping device mentioned above.

[0034] In some embodiments, the pole piece die-cutting device further comprises a tape roller and a feed roller, wherein the feed roller is used to unwind the pole piece tape to the tape roller;

[0035] The pole piece tape connection device comprises a first material taking station and a second material taking station, wherein the first material taking station is located between the tape walking roller and the material feeding roller, and the second material taking station is arranged corresponding to the material feeding roller;

[0036] The two connecting parts of the pole piece connecting device include:

[0037] A first tape connection part moves between the first material taking station and the tape connection station, and is used to connect the tail end of the pole piece tape on the tape roller at the first material taking station; and

[0038] The second tape connection part moves between the second material taking station and the tape connection station, and is used for connecting the head end of the pole piece tape on the full material feeding roller at the second material taking station.

[0039] Among them, the first splicing part can be used to move between the first material picking station and the splicing station to pick up the tail end of the pole piece tape on the tape feeding roller and pull it to the splicing station by means of the movement of the first splicing part between the second material picking station and the splicing station, so as to pick up the head end of the pole piece tape on the full material feeding roller and pull it to the splicing station, thereby realizing the automatic receiving and transfer of two pole piece tapes to be connected, improving the degree of automation, and improving the splicing efficiency of the pole piece tapes.

[0040] In some embodiments, two feeding rollers are provided, and the two feeding rollers are used to alternately feed the tape-walking roller;

[0041] Two of the first material taking stations and two of the second material taking stations are respectively provided;

[0042] The first belt splicing unit moves between the belt splicing station and the two first material taking stations;

[0043] The second belt splicing part moves between the belt splicing station and the two second material taking stations.

[0044] Among them, two feed rollers are used to alternately supply the electrode material tape to the walking roller. While the currently unwinding feed roller is gradually becoming empty, the other empty feed roller can be replaced with a full feed roller. After the currently unwinding feed roller is completely empty, the electrode material tape on the walking roller can be immediately connected to the electrode material tape on the full feed roller. Compared with the solution in which a single feed roller unwinds the walking roller, this solution completes the roll changing action during the unwinding process of the feed roller, thereby saving the roll changing time and shortening the downtime of the electrode die-cutting equipment.

[0045] In some embodiments, the pole piece die-cutting device has a material strip stabilization station, and a material strip stabilization device is provided at the material strip stabilization station, and the material strip stabilization device includes:

[0046] A tension detection unit, used to detect the tension of the pole piece strip;

[0047] A roller assembly, comprising a plurality of rotating rollers, the plurality of rotating rollers are used for winding the pole piece strip, the plurality of rotating rollers include a tension roller and two limiting rollers, the two limiting rollers are arranged at intervals along a first direction and are used to support one side of the pole piece strip, the tension roller is arranged between the two limiting rollers and can be movably arranged along a second direction to press the other side of the pole piece strip;

[0048] A driving device includes a driving portion that is telescopically movable along the second direction, wherein the driving portion is connected to the roller shaft of the tension roller; and

[0049] The control device is electrically connected to the driving device and the tension detection unit, and controls the driving device to operate according to a detection signal from the tension detection unit.

[0050] Among them, through the interval arrangement of two limiting rollers along the first direction, an active adjustment range is provided for the tension roller. In this active adjustment range, the tension roller can press the pole piece strip along the second direction under the drive of the driving part. Since the control device can control the corresponding action of the driving device according to the pole piece tension detected by the tension detection part, a feedback adjustment mechanism is formed, which can stabilize the tension of the pole piece strip within a reliable range, control the tension fluctuation range of the pole piece strip before die-cutting, and then control the jitter amplitude of the pole piece strip along the incoming direction to ensure the die-cutting quality.

[0051] In some embodiments, the driving device includes two driving cylinders, and the cylinder rods of the two driving cylinders are respectively connected to the two ends of the roller shaft of the tension roller;

[0052] The driving part includes two cylinder rods of the driving cylinders.

[0053] Among them, compared with other types of driving methods, the operation and maintenance of the driving cylinder are relatively simple and easy to install. More importantly, the driving cylinder can provide fast linear motion, which is suitable for the feedback adjustment scenario that requires fast response in the embodiment of the present application; by setting two driving cylinders to drive the movement of the tension roller from both ends of the roller shaft respectively, it is beneficial to reduce the bending stress borne by the cylinder rod, and control the deformation of the tension roller to hold the pole sheet strip itself, thereby improving the feedback control accuracy of the control device.

[0054] In some embodiments, the drive cylinder comprises a vacuum cylinder.

[0055] Among them, compared with the standard cylinder, the vacuum cylinder has a larger stroke, a larger adjustable range for the tension roller, and the vacuum cylinder reacts more quickly, which is beneficial to improve the adjustment sensitivity and can further reduce the tension fluctuation range of the pole sheet strip before die-cutting.

[0056] In some embodiments, the cylinder cavities of the two driving cylinders are connected to each other.

[0057] Among them, the cylinder cavities of the two driving cylinders are interconnected, which can ensure that the internal pressures of the two driving cylinders are always at the same level, can improve the synchronization of the telescopic activities of the two cylinder rods, and can further improve the feedback control accuracy of the control device.

[0058] In some embodiments, the pole piece die-cutting equipment further comprises a die-cutting station, and a die-cutting device is provided at the die-cutting station;

[0059] The strip stabilizing station is disposed adjacent to the die cutting station.

[0060] Among them, setting the strip stabilization station adjacent to the die-cutting station is conducive to the strip stabilization device controlling the tension of the pole piece strip at the position closest to the die-cutting device, so as to ensure that the strip stabilization device controls the tension of the pole piece strip to meet the cutting requirements of the die-cutting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0062] Figure 1 A simplified structural diagram of an embodiment of a pole piece die cutting device provided in this application;

[0063] Figure 2 A simplified structural diagram of another state of the pole piece die-cutting equipment provided by the present application;

[0064] Figure 3 A simplified structural diagram of another state of the pole piece die-cutting equipment provided by the present application;

[0065] Figure 4 A simplified structural diagram of another state of the pole piece die-cutting equipment provided in this application;

[0066] Figure 5 for Figure 1 A partial enlarged structural diagram of the middle rubber supply roller, the rubber pulling part, the limit part and the rubber carrying part;

[0067] Figure 6 for Figure 5 A schematic diagram of the planar structure of the middle glue-carrying part from another perspective;

[0068] Figure 7 for Figure 1 A schematic diagram of the structure of the middle belt portion;

[0069] Figure 8 A simplified structural diagram of another embodiment of the pole piece die-cutting equipment provided in this application;

[0070] Fig. 9 for Figure 8 A plan view schematically showing the central drive device and the tension roller from another perspective.

[0071] Description of Figure Numbers:

[0072] 100. Pole die-cutting equipment;

[0073] 1. Pole piece connection device;

[0074] 11. Glue carrying part; 11a. Glue carrying surface; 111. Vacuum adsorption hole; 121. Tape splicing part; 121a. Tape winding roller; 1211a. Clamping part; 1211. First tape splicing part; 1212. Second tape splicing part; 13. Glue supply roller; 14. Glue pulling part; 15. Position limiting part; 16. Glue cutting part;

[0075] 2. Material belt stabilizing device;

[0076] 21. Roller assembly; 211. Rotating roller; 211a. Tension roller; 211b. Limiting roller; 22. Driving device; 221. Driving unit; 22a. Driving cylinder; 221a. Cylinder rod; 222. Vacuum tube;

[0077] 3. Pole sheet tape; 4. Adhesive tape; 5. Tape roller; 6. Feed roller; 7. Die-cutting device;

[0078] X, first direction; Y, second direction.

[0079] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0080] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0081] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0082] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0083] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0084] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0085] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0086] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0087] In the production process of lithium-ion batteries, after the coating and drying steps, the electrode material strips need to be cut into specific sizes and shapes by die-cutting equipment. In the die-cutting equipment, the electrode material strips are usually fed to the tape transport mechanism in the form of coils. After a roll of electrode material strips is unrolled and emptied, the die-cutting equipment needs to be shut down for a period of time, and the electrode material strips on the tape transport mechanism need to be connected to the full electrode material strips by adhesive tape to ensure continuous feeding to the tape transport mechanism. However, most of the existing die-cutting equipment adopts manual splicing, and the reliability of manual splicing is poor. The adhesive tape is easy to fall off, resulting in a high risk of electrode material strip breakage. At the same time, the efficiency of manual splicing is low, resulting in a long downtime of the die-cutting equipment, affecting the production efficiency of the die-cutting equipment.

[0088] Analyzing the causes of the above problems, since the electrode tape has a certain flexibility, manual gluing and splicing may result in the problem of too little local gluing pressure between the electrode tape and the adhesive tape, and there may also be problems of bubbles not being squeezed out at the connection between the electrode tape and the adhesive tape, making it difficult to ensure uniform bonding between the electrode tape and the adhesive tape; during the tape feeding process, since the electrode tape needs to bear tension, the area where the electrode tape and the adhesive tape are not firmly bonded is prone to debonding first, causing the remaining area of ​​the adhesive tape to be subjected to excessive force, exceeding its adhesion limit, thereby causing the adhesive tape to fall off, which results in a higher risk of tape breakage after the splicing.

[0089] In view of this, it is possible to consider using a mechanical structure to replace manual automatic splicing operations. For example, two splicing parts mechanically pick up the two pole piece tapes to be connected, and a glue carrier part provides an adhesive tape. With the precise positioning of the two splicing parts and the glue carrier part, the two pole piece tapes can be stably and evenly adhered to the adhesive tape, thereby at least improving the poor reliability of the manual splicing method in existing die-cutting equipment.

[0090] See also Figures 1 to 4 ,in, Figure 1 A simplified structural diagram of an embodiment of the electrode die-cutting equipment provided in the present application (the glue drawing part 14 in the figure is at the second glue drawing station, the glue carrying part 11 is at the glue taking station, the two tape connecting parts 121 include a first tape connecting part 1211 and a second tape connecting part 1212, which are respectively at the first material taking station and the second material taking station, and the left feed roller 6 has finished unwinding to the tape walking roller 5); Figure 2 A simplified structural diagram of another state of the electrode die-cutting device provided in the present application (the two tape splicing parts 121 in the figure pick up the corresponding electrode material tapes to the tape splicing station respectively, the glue carrying part 11 is also in the tape splicing station, the two tape splicing parts 121 include two tape winding rollers 121a, and the two tape winding rollers 121a approach each other and start to rotate in opposite directions); Figure 3 A schematic structural diagram of another state of the pole piece die-cutting device provided in the present application (the two winding rollers 121a in the figure are close to each other and rotate in opposite directions, and the pole piece material strips 3 wound by each of them are unfolded to the adhesive tape 4); Figure 4 A simplified structural diagram of another state of the electrode die-cutting equipment provided in the present application (the glue carrying part 11 in the figure is in the glue taking station, the glue pulling part 14 is in the first glue pulling station, the adhesive tape 4 is pulled from the limiting part 15, and the two electrode material strips 3 have been bonded together by the corresponding adhesive tapes 4).

[0091] In one embodiment of the present application, the pole piece tape device 1 is used to connect two pole piece tapes 3, the pole piece tape device 1 has a tape connection station, the pole piece tape device 1 includes a glue carrier 11 and two tape connection parts 121, the glue carrier 11 has a glue carrier surface 11a, and the glue carrier surface 11a is used to position and load the adhesive tape 4; the tape connection part 121 is used to pick up the end of the pole piece tape 3, at least one of the two tape connection parts 121 is set as a tape roller 121a, and the tape roller 121a is rotatably set to wind the corresponding pole piece tape 3; wherein the glue carrier 11 and the two tape connection parts 121 are at least partially able to be close to the tape connection. The two connecting parts 121 are movably arranged in the direction of the work station so that the glue-carrying part 11 and the two connecting parts 121 can be located at the corresponding connecting part; at the connecting part, the two connecting parts 121 and the glue-carrying part 11 have a relative movable stroke, so that the two connecting parts 121 are respectively abutted against the glue-carrying surface 11a, and the ends of the two pole piece tapes 3 are adhered to the adhesive tape 4; at the connecting part, the two connecting parts 121 are spaced apart along the length direction of the glue-carrying surface 11a, and the winding roller 121a therein can be reversed and moved close to the other connecting part 121 to release the corresponding pole piece tape 3 and unfold it to be adhered to the adhesive tape 4.

[0092] It should be noted that the embodiments of the present application mention the movement of specific components along a specific direction, between specific workstations, and within a specific movable stroke many times. For example, in the present embodiment, "the glue-carrying part 11 and the two connecting parts 121 are at least partially able to move in the direction close to the connecting station", "the two connecting parts 121 have a relative movable stroke with the glue-carrying part 11", and "the winding roller 121a can reverse and move close to the other connecting part 121". The realization of these actions is usually completed by a movable limit device combined with a drive device 22. The movable limit device is used to limit the movement of specific components within a specific stroke. Its specific structural types include, for example, structures such as linear guides, and the drive device 22 is used to drive the specific components to move within the specific stroke limited by the movable limit device. In the manufacturing field, there are many structural types of movable limit devices combined with drive devices 22, and the embodiments of the present application do not list them all.

[0093] The function of the "glue-carrying part 11" is to use its glue-carrying surface 11a to load the adhesive tape 4. The glue-carrying surface 11a can be a flat surface or a curved surface (for example, a wavy curved surface). This embodiment does not limit this. As long as it can ensure that the ends of the pole piece tape 3 picked up by the two tape-joining parts 121 can be attached to the adhesive tape 4, and ensure that the two pole piece tapes 3 can be naturally opened along the tape-joining direction under the action of the tape-joining tension after the tape-joining is completed; wherein, the glue-carrying part 11 uses its glue-carrying surface 11a to load the adhesive tape 4 There are many possible ways, for example, the adhesive tape 4 is pressed onto the adhesive surface 11a by means of pressure-holding and limiting (only the local position of the periphery of the adhesive tape 4 is pressed and limited, and it does not affect the adhesion of most of the position to the electrode material strip 3). For another example, a double-sided adhesive tape 4 is used, one side of the adhesive tape 4 provides a bonding basis for the two electrode material strips 3, and the other side can be bonded to the adhesive surface 11a, thereby realizing autonomous positioning and loading (the adhesive tape 4 can be torn off the adhesive surface 11a after the tape connection is completed).

[0094] The two connecting parts 121 are provided to respectively pick up the ends of the two pole piece strips 3 to be connected. There are many ways for the connecting parts 121 to pick up the pole piece strips 3, for example, sucking the pole piece strips 3 by vacuum adsorption, or clamping the pole piece strips 3 by clamping and limiting, which is not limited in this embodiment.

[0095] It is worth mentioning that the two pole piece strips 3 are bonded to the adhesive tape 4 in two ways, namely, "pressing the two pole piece strips 3 onto the fixed adhesive tape 4" or "sticking the adhesive tape 4 onto the two fixed pole piece strips 3". Based on this, "the glue-carrying portion 11 and the two connecting portions 121 are at least partially movable in the direction close to the connecting station, so that the glue-carrying portion 11 and the two connecting portions 121 can be correspondingly located at the connecting station". It can be understood that the glue-carrying portion 11 can be fixedly arranged at the connecting station, and the two connecting portions 121 can be movable in the direction close to the connecting station, so as to pick up the pole piece strip 3 at a position away from the connecting station, and then move it close to the connecting station. Of course, it can also be understood that the two connecting parts 121 are always in the connecting position (the pole piece tape 3 is pulled onto the connecting part 121 by manual or other mechanical parts, and is picked up and fixed by the connecting part 121), and the glue carrier 11 can move in the direction close to the connecting position, so as to stick the adhesive tape 4 on its carrying surface 11a to the pole piece tape 3 on the two connecting parts 121. Based on this, the effect of "the two connecting parts 121 and the glue carrier 11 having a relative moving stroke" is that the connecting part 121 and the glue carrier 11 can be arranged to abut against each other, so as to stably press the end of the pole piece tape 3 to the adhesive tape 4.

[0096] “At least one of the two connecting parts 121 is set as the winding roller 121a” can be understood as only setting one of the connecting parts 121 as the winding roller 121a, or it can be understood as setting the two connecting parts 121 as the winding rollers 121a respectively; after picking up the pole piece tape 3, due to the rotation setting of the winding roller 121a, the winding roller can wind a part of the length of the pole piece tape 3 on its own circumference, and when the two connecting parts 121 are in the connecting position and abut against the rubber carrier surface 11a, the two connecting parts 121 are spaced apart along the length direction of the rubber carrier surface 11a. This spacing distance allows the winding rollers 121a in the two connecting parts 121 to be able to reverse close to the other connecting part 121, and the reversal movement of the winding roller 121a at this time is relative to the “ As for the "forward rotation" winding activity, its purpose is to release part of the length of the pole piece tape 3 wound by itself, so that it can be gradually unfolded and pasted to the adhesive tape 4; obviously, the winding roller 121a should also have an active stroke close to another connecting part 121 at the tape splicing station. There are many ways to achieve this action, such as connecting the roller shaft of the winding roller 121a to a linear guide rail, and then driving its movement by a drive motor; as for the direct bonding of the pole piece tape 3 and the adhesive tape 4 intersecting in a large area, the pole piece tape 3 is gradually released by the reversal of the winding roller, and it is bonded to the adhesive tape 4. It is not easy to have cavities and bubbles between the pole piece tape 3 and the adhesive tape 4, and each part between the pole piece tape 3 and the adhesive tape 4 can obtain the uniform rolling effect of the winding roller 121a, which can ensure a firm bond.

[0097] With regard to the scheme in which the two tape connecting parts 121 in this embodiment are respectively configured as winding rollers 121a, "the winding roller 121a can move in reverse close to the other tape connecting part 121", that is, the two winding rollers 121a can move in reverse close to each other. It should be noted here that the rotation directions of the two winding rollers 121a are opposite in this process, and are both relative to the "forward" winding activities when each picks up the pole piece material strip 3; for ease of understanding, the two winding rollers 121a are now defined as the first winding roller 121a and the second winding roller 121a. At the tape connecting station, the first winding roller 121a is at the left end of the rubber carrying surface 11a of the rubber carrying part 11, and the second winding roller 121a is at the left end of the rubber carrying surface 11a of the rubber carrying part 11. The second tape roller 121a is located at the right end of the rubber-carrying surface 11a of the rubber-carrying portion 11. At this time, the pole piece tape 3 on the first tape roller 121a is wound counterclockwise on the first tape roller 121a (this also means that the first tape roller 121a winds up the pole piece tape 3 counterclockwise), and the first tape roller 121a needs to move to the right and unwind and rotate clockwise to release the pole piece tape 3. At this time, the pole piece tape 3 on the second tape roller 121a is wound clockwise on the second tape roller 121a (this also means that the second tape roller 121a winds up and picks up the pole piece tape 3 clockwise), and the second tape roller 121a needs to move to the left and unwind and rotate counterclockwise to release the pole piece tape 3. The two tape rollers 121a can approach each other at the tape connection station at the same time, or they can move toward each other's position one after another, which is not limited in this embodiment.

[0098] In this embodiment, the glue carrying portion 11 and the connecting portion 121 can be understood to be movable within the same installation plane. The three can be movably installed on the same installation base, or can be installed on different installation bases respectively. This embodiment of the present application is not limited to this.

[0099] The technical solution provided by the present application is that the adhesive surface 11a of the adhesive carrier 11 can be positioned to load the adhesive tape 4, and the two tape connecting parts 121 can pick up the ends of the two electrode material strips 3 respectively. Since the adhesive carrier 11 and the two tape connecting parts 121 can at least partially move in the direction close to the tape connecting station, and there is a relative movable stroke between the two tape connecting parts 121 and the adhesive carrier 11, the adhesive tape 4 can be bonded to the two electrode material strips 3 at the tape connecting station, and the two tape connecting parts 121 are used in combination with the adhesive carrier 11. The method of action 11 replaces the manual splicing operation of the two pole piece tapes 3. Not only that, the winding rollers 121a in the two splicing parts 121 can wind a certain length of the pole piece tape 3 when picking up the pole piece tape 3, and can also use their own reversal to gradually release the pole piece tape 3 during the bonding stage and stick it to the adhesive tape 4. This roller bonding method can ensure the bonding firmness between the pole piece tape 3 and the adhesive tape 4, improve the reliability of the splicing, and reduce the risk of the pole piece tape 3 breaking.

[0100] Moreover, compared with the manual splicing method, the pole piece splicing device 1 provided in the embodiment of the present application is a mechanical automatic operation, and also has the advantages of high splicing efficiency and good repeatability stability, which can reduce the downtime of the pole piece die-cutting equipment 100 and improve the production efficiency of the pole piece die-cutting equipment 100.

[0101] For a specific method of providing the adhesive tape 4 to the tape splicing station by the adhesive carrier 11, please refer to Figure 5 , Figure 5 for Figure 1 A partial enlarged structural schematic diagram of the middle glue supply roller 13, the glue pulling part 14, the limiting part 15 and the glue carrying part 11 (the limiting part 15 in the figure is at the first glue pulling station, the glue pulling part 14 is at the second glue pulling station, and the glue carrying part 11 is at the glue taking station). In some embodiments, the electrode tape splicing device 1 also has a glue taking station, a first glue pulling station and a second glue pulling station, and the first glue pulling station and the second glue pulling station are respectively located on opposite sides of the glue taking station; the electrode tape splicing device 1 also includes a rotatably arranged glue supply roller 13 and a glue pulling part 14, the glue supply roller 13 is used to unwind and provide the adhesive tape 4; the glue pulling part 14 moves between the first glue pulling station and the second glue pulling station to pick up the adhesive tape 4 on the glue supply roller 13 at the first glue pulling station, and pull the adhesive tape 4 to the second glue pulling station; wherein, the glue carrying part 11 moves between the glue taking station and the tape splicing station to position and load the adhesive tape 4 at the glue taking station and transport it to the tape splicing station.

[0102] It should be noted that the function of the glue supply roller 13 is to provide the adhesive tape 4 to the first glue drawing station through its own rotation and unwinding. There are many possible settings of the glue supply roller 13. For example, the glue supply roller 13 is located close to the first glue drawing station, and the adhesive tape 4 unrolled can be directly located at the first glue picking station, which enables the glue drawing unit 14 to pick up the adhesive tape 4 at the first glue picking position; for another example, the setting position of the glue supply roller 13 has no direct connection with the first glue drawing station and the second glue drawing station, and the adhesive tape 4 unrolled can adjust the tape path through other rotating rollers to reach the first glue drawing station, so that the glue drawing unit 14 can also pick up the adhesive tape 4 at the first glue picking position.

[0103] “The glue drawing part 14 moves between the first glue drawing station and the second glue drawing station” can be understood as that the glue drawing part 14 moves back and forth between the first glue drawing station and the second glue drawing station along a straight line or a curve, and this embodiment does not limit this; similar to the way in which the “tape connecting part 121” picks up the pole piece tape 3, the glue drawing part 14 can absorb the adhesive tape 4 by vacuum adsorption, or clamp the adhesive tape 4 by clamping and limiting, and this embodiment does not limit this.

[0104] "The first glue pulling station and the second glue pulling station are respectively located on the opposite sides of the glue taking station", that is, the glue taking station is located between the first glue pulling station and the second glue pulling station. This allows the glue pulling unit 14 to pull the adhesive tape 4 at the first glue pulling station to the second glue pulling station, and also allows the glue carrying unit 11 to position and load the adhesive tape 4 at the glue taking station. It is worth mentioning that the adhesive tape 4 at the glue taking station also needs to be cut. For example, the adhesive tape 4 can be cut by manual cutting, or by setting a cutting unit (such as a laser cutting head) at the glue taking station. The present embodiment does not limit the method of cutting the adhesive tape 4.

[0105] According to the above technical scheme, the rotatable glue supply roller 13 can continuously unwind and provide the adhesive tape 4 to the first glue drawing station, and the glue drawing part 14 can move between the first glue drawing station and the second glue drawing station, and can pull the adhesive tape 4 at the first station to the second glue drawing station, so that the adhesive tape 4 can pass through the glue taking station, and the glue carrying part 11 can position and load the adhesive tape 4 at the glue taking station, and transfer it to the tape splicing station, thereby realizing the continuous and automatic supply of the adhesive tape 4, so that the supply frequency of the adhesive tape 4 of the glue carrying part 11 can be adapted to the picking frequency of the pole piece tape 3 of the two tape splicing parts 121, thereby ensuring the efficient carrying out of the tape splicing operation.

[0106] Further, for the specific method of keeping the adhesive tape 4 unwound by the adhesive supply roller 13 at the first adhesive drawing station, please continue to refer to Figure 5 In some embodiments, the electrode tape connection device 1 further includes a limiting portion 15, which is disposed at the first glue drawing station to limit and fix or loosen the adhesive tape 4 pulled out from the self-supplying glue roller 13; the glue drawing portion 14 pulls the adhesive tape 4 from the limiting portion 15 at the first glue drawing station.

[0107] It should be noted that the limiting portion 15 is arranged at the first glue drawing station and can fix or loosen the adhesive tape 4 pulled out from the self-supply glue roller 13. Its purpose is to keep the adhesive tape 4 at the first glue drawing station. The state of the limiting portion 15 fixing or loosening the adhesive tape 4 is adapted to the position of the glue drawing portion 14. The loosened state corresponds to the glue drawing portion 14 being at the first glue drawing station, and the fixed state corresponds to the glue drawing portion 14 being at the second glue drawing station. Similar to the way the "tape connecting portion 121" picks up the pole piece tape 3, the limiting portion 15 can absorb and fix the adhesive tape 4 by vacuum adsorption, or it can clamp and fix the adhesive tape 4 by clamping and limiting. This embodiment does not limit this.

[0108] According to the above technical scheme, when the glue pulling part 14 picks up the adhesive tape 4 extending from the limiting part 15 at the first glue pulling station, the limiting part 15 will change from a fixed state to a loose state, so that the glue pulling part 14 can pull the adhesive tape 4 to the second glue pulling station. When the glue pulling part 14 pulls the adhesive tape 4 to the second glue pulling station, the limiting part 15 will change from a loose state back to a fixed state, thereby re-fixing the adhesive tape 4. After a section of the adhesive tape 4 at the glue taking station is cut off and taken away, the adhesive tape 4 at the first glue pulling station can be stably maintained on the limiting part 15, which is convenient for the subsequent cycle picking up of the glue pulling part 14. Through the setting of the limiting part 15, the accuracy of the glue pulling part 14 in picking up the adhesive tape 4 can be greatly improved.

[0109] Please continue reading Figure 5 In another embodiment, the electrode tape connection device 1 further includes a glue cutting section 16, which can be located at the glue taking station to cut the adhesive tape 4 after the adhesive carrying surface 11a of the adhesive carrying section 11 is positioned and loaded at the glue taking station.

[0110] It should be noted that the function of the "glue cutting unit 16" is to cut the adhesive tape 4 at the glue taking station. The glue cutting unit 16 can cut the adhesive tape 4 at both ends of the length direction of the adhesive surface 11a of the adhesive carrying unit 11, or only cut the adhesive tape 4 at the adhesive surface 11a of the adhesive carrying unit 11 near the first glue drawing station. The reason is that the adhesive tape 4 pulled by the glue drawing unit 14 is already at the end and does not need to be cut. It only needs to control the glue drawing unit 14 to loosen the adhesive part so that the adhesive carrying unit 11 can take away the adhesive tape 4. The glue cutting unit 16 can be set as a laser cutting head or a movable cutting blade. Regardless of the type of glue cutting unit 16, it should be recognized that the glue cutting unit 16 belongs to the automatic cutting structure category.

[0111] According to the above technical scheme, by setting the glue cutting part 16, the adhesive tape 4 can be automatically cut off after the adhesive tape 4 is positioned and loaded on the adhesive surface 11a of the adhesive carrier 11, so as to ensure that the adhesive carrier 11 can smoothly leave the glue taking station. Compared with the manual glue cutting method, the setting of the glue cutting part 16 can accurately coordinate the glue taking timing of the adhesive carrier 11, thereby continuously and efficiently completing the glue cutting operation.

[0112] Further, for the specific location of the cutting unit 16, please refer to Figure 5 and Figure 6 ,in Figure 6 for Figure 5 A schematic diagram of the planar structure of the middle adhesive carrier from another perspective. In some embodiments, the adhesive cutting portion 16 is disposed on the side of the adhesive carrier 11 adjacent to the adhesive carrier surface 11a, and the adhesive cutting portion 16 can be extended and retracted in the direction of the adhesive carrier surface 11a to cut the adhesive tape 4.

[0113] It should be noted that, in order to ensure that the adhesive tape 4 between the adhesive carrier 11 and the first adhesive drawing station is cut, "the adhesive cutting portion 16 is arranged on the side of the adhesive carrier 11 adjacent to the adhesive carrier surface 11a" at least includes the adhesive cutting portion 16 being arranged on the side of the adhesive carrier 11 close to the first adhesive drawing station, such as Figure 5 As shown in . “The rubber cutting part 16 can be extended and retracted in the direction of the rubber carrying surface 11a to cut the adhesive tape 4”, it can be understood that the rubber cutting part 16 has a cutting edge, and the cutting edge can cut the adhesive tape 4 within the moving stroke of the rubber cutting part 16 protruding from the rubber carrying surface 11a. There are many ways to drive the rubber cutting part 16 to extend and retract, such as cylinder drive or magnetic drive, which is not limited in this embodiment.

[0114] According to the above technical solution, the glue cutting part 16 is arranged on the glue carrying part 11, and can move with the glue carrying part 11. When the glue carrying part 11 moves to the glue taking station and positions and loads the adhesive tape 4, the glue cutting part 16 can automatically cut the adhesive tape 4, so that the glue carrying part 11 can quantitatively intercept the adhesive tape 4. At the same time, the glue cutting part 16 can be telescopically moved for cutting. Its structure is relatively simple, which is convenient for relying on the glue carrying part 11 as the installation basis, and can reduce the installation space occupied on the electrode die-cutting equipment 100.

[0115] For the action logic of the tape splicing unit 121 picking up the electrode strip 3 to the tape splicing station, please refer to Figures 1 to 4 In some embodiments, the pole piece tape splicing device 1 further comprises a first material picking station and a second material picking station, and the first material picking station and the second material picking station are arranged offset from the tape splicing station; the two tape splicing parts 121 comprise a first tape splicing part 1211 and a second tape splicing part 1212, and the first tape splicing part 1211 moves between the first material picking station and the tape splicing station to pick up the tail end of the pole piece tape 3 on the tape feed roller 5 at the first material picking station and pull it to the tape splicing station; the second tape splicing part 1212 moves between the second material picking station and the tape splicing station to pick up the head end of the pole piece tape 3 on the full material feeding roller 6 at the second material picking station and pull it to the tape splicing station.

[0116] It should be noted that, in the electrode die-cutting equipment 100, the electrode tape splicing device 1 is usually equipped with a tape roller 5 and a full material feed roller 6 to perform continuous tape feeding operations. The essence of the electrode tape splicing is that after the electrode tape 3 on the empty material feed roller 6 is unwound onto the tape roller 5, the tail of the electrode tape 3 on the tape roller 5 is bonded to the head of the electrode tape 3 on the full material feed roller 6 by means of an adhesive tape 4.

[0117] In this solution, the first material picking station corresponds to the installation position of the tape roller 5. The tail end of the pole sheet material strip 3 on the tape roller 5 will pass through the first material picking station. The first tape connection part 1211 can connect the tail end of the pole sheet material strip 3 on the tape roller 5 at the first material picking station and pull it to the tape connection station. Figures 1 to 4As shown, the pole piece material strip 3 between the tape roller 5 and the feeding roller 6 will maintain the tape path unchanged during the unwinding process, and the tape path passes through the first material picking station, so that it can be ensured that the tail end of the pole piece material strip 3 on the tape roller 5 is first picked up by the first splicing part 1211 at the first material picking station, and then the connection between the tail end of the pole piece material strip 3 and the empty material feeding roller 6 is cut off, and the first splicing part 1211 can move toward the splicing station. For example, after the feeding roller 6 finishes feeding the tape roller 5, the tail end of the pole piece material strip 3 on the tape roller 5 will naturally fall to the first material picking station, so that the first splicing part 1211 can pick up the tail end of the pole piece material strip 3 on the tape roller 5 at the first material picking station.

[0118] In the present scheme, the second material picking station corresponds to the installation position of the feeding roller 6. After the full feeding roller 6 is installed, it is necessary to ensure that the head end of the upper pole sheet material strip 3 can be maintained at the second material picking station. For example, after the full feeding roller 6 is installed, the head end of the upper pole sheet material strip 3 can naturally fall to the second material picking station. For another example, after the full feeding roller 6 is installed, the head end of the upper pole sheet material strip 3 can reach the second material picking station under the pulling of the pulling structure, so that the second connecting part 1212 can receive the head end of the upper pole sheet material strip 3 of the full feeding roller 6 at the second material picking station.

[0119] According to the above technical scheme, by utilizing the movement of the first connecting part 1211 between the first material picking station and the connecting station, the tail end of the pole piece tape 3 on the tape-feeding roller 5 can be connected and pulled to the connecting station. By utilizing the movement of the second connecting part 1212 between the second material picking station and the connecting station, the head end of the pole piece tape 3 on the full material feeding roller 6 can be connected and pulled to the connecting station, thereby realizing the automatic connection and transfer of the two pole piece tapes 3 to be connected, the degree of automation is improved, and the connecting efficiency of the pole piece tapes 3 is also improved.

[0120] Regarding the specific positioning and loading method of the adhesive tape 4 by the adhesive carrier 11, in some embodiments, please refer to Figure 6 The adhesive carrying surface 11 a of the adhesive carrying portion 11 is provided with a plurality of vacuum adsorption holes 111 .

[0121] It should be noted that "the adhesive surface 11a of the adhesive carrier 11 is provided with a plurality of vacuum adsorption holes 111" means that the adhesive carrier 11 is positioned and loaded with the adhesive tape 4 by vacuum adsorption. For this positioning and loading scheme, the adhesive tape 4 generally adopts a single-sided adhesive tape structure, wherein the non-adhesive surface is used to contact the adhesive carrier surface 11a, and the adhesive surface is used to bond the electrode material strip 3.

[0122] According to the above technical solution, the adhesive carrier 11 adopts vacuum adsorption to position and load the adhesive tape 4. There is no need to reserve extra area for the adhesive tape 4 to be held by the holding mechanism, and there is no need to leave extra adhesive tape 4 on the side of the width direction of the electrode material strip 3. The impact on the tape feed roller 5 is small, and it is relatively easy and efficient to fix and release the adhesive part by vacuum adsorption.

[0123] For details on the specific fixing method of the winding roller 121a to the electrode strip 3, please refer to Figure 7 ,in, Figure 7 for Figure 1 Schematic diagram of the structure of the middle tape portion. In some embodiments, the tape roller 121a includes two clamping portions 1211a. The two clamping portions 1211a are arranged opposite to each other in the rotation radial direction of the tape roller 121a and can move close to each other to clamp the pole piece tape 3 therebetween.

[0124] It should be noted that "the winding roller 121a includes two clamping parts 1211a, and the two clamping parts 1211a are arranged opposite to each other in the rotation radial direction of the winding roller 121a, and can move close to each other", which means that the structural type and action logic of the winding roller 121a are similar to the pole piece winding needle structure. Regarding the pole piece winding needle structure, the embodiment of the present application will not be described in detail. In the process of the two clamping parts 1211a moving away from each other, a clamping gap can be formed therebetween, and the pole piece strip 3 can extend into the clamping gap. In the process of the two clamping parts 1211a approaching each other, they can clamp the pole piece strip 3.

[0125] According to the above technical solution, the winding roller 121a clamps the pole piece strip 3 through two clamping parts 1211a, which is a mechanical fixing method. The two clamping parts 1211a can make the clamping force applied larger, which is sufficient to stably clamp the pole piece strip 3 and reduce the probability of the pole piece strip 3 falling off the winding roller.

[0126] See also Figures 1 to 4 The present application also proposes a pole piece die-cutting device 100, which includes a pole piece tape connecting device 1. The specific structure of the pole piece tape connecting device 1 refers to the above embodiment. Since the pole piece die-cutting device 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0127] Please continue reading Figures 1 to 4In some embodiments, the pole piece die-cutting equipment 100 also includes a tape roller 5 and a feeding roller 6, and the feeding roller 6 is used to provide the pole piece tape 3 to the tape roller 5 for unwinding; the pole piece tape splicing device 1 has a first material picking station and a second material picking station, the first material picking station is located between the tape roller 5 and the feeding roller 6, and the second material picking station is arranged corresponding to the feeding roller 6; the two splicing parts 121 of the pole piece splicing device 1 include a first splicing part 1211 and a second splicing part 1212, the first splicing part 1211 moves between the first material picking station and the splicing station, and is used to pick up the tail end of the pole piece tape 3 on the tape roller 5 at the first material picking station; the second splicing part 1212 moves between the second material picking station and the splicing station, and is used to pick up the head end of the pole piece tape 3 on the full feeding roller 6 at the second material picking station.

[0128] It should be noted that the above embodiment has explained the corresponding relationship between the first material taking station, the second material taking station, the belt conveyor roller 5 and the feeding roller 6, which will not be elaborated in this embodiment.

[0129] According to the above technical scheme, by utilizing the movement of the first connecting part 1211 between the first material picking station and the connecting station, the tail end of the pole piece tape 3 on the tape-feeding roller 5 can be connected and pulled to the connecting station. By utilizing the movement of the second connecting part 1212 between the second material picking station and the connecting station, the head end of the pole piece tape 3 on the full material feeding roller 6 can be connected and pulled to the connecting station, thereby realizing the automatic connection and transfer of the two pole piece tapes 3 to be connected, the degree of automation is improved, and the connecting efficiency of the pole piece tapes 3 is also improved.

[0130] Furthermore, in some embodiments, two feeding rollers 6 are provided, and the two feeding rollers 6 are used to alternately feed materials to the tape roller 5; two first material picking stations and two second material picking stations are provided respectively; the first belt connecting part 1211 moves between the belt connecting station and the two first material picking stations; the second belt connecting part 1212 moves between the belt connecting station and the two second material picking stations.

[0131] It should be noted that please combine Figure 1 The first belt connecting part 1211 in the figure is located at the first material picking station between the feeding roller 6 and the belt walking roller 5 on the left, and there is another first material picking station between the feeding roller 6 and the belt walking roller 5 on the right. Similarly, the second belt connecting part 1212 in the figure is located at the second material picking station corresponding to the full feeding roller 6 on the right, and there is another second material picking station corresponding to the feeding roller 6 on the left. The position status of the other first material picking station and the other second material picking station is not shown in the figure.

[0132] Two feed rollers 6 are provided corresponding to the belt-walking roller 5. The two feed rollers 6 can be provided on the same side of the belt-walking roller 5 or on different sides of the belt-walking roller 5 (for example, Figures 1 to 4As shown in ), its specific setting position can be determined according to the spatial layout of the pole piece die-cutting equipment 100, and this embodiment does not limit it.

[0133] According to the above technical scheme, two feeding rollers 6 are used to alternately unwind the pole piece material tape 3 to the tape feed roller 5. While the currently unwinding feeding roller 6 is gradually becoming empty, the other empty feeding roller 6 can be replaced with a full feeding roller 6. After the currently unwinding feeding roller 6 is completely empty, the pole piece material tape 3 on the tape feed roller 5 can be immediately connected to the pole piece material tape 3 on the full feeding roller 6. Compared with the scheme in which a single feeding roller 6 unwinds the tape feed roller 5, this scheme completes the roll changing action during the unwinding process of the feeding roller 6, thereby eliminating the roll changing time and shortening the downtime of the pole piece die-cutting equipment 100.

[0134] In the pole piece die-cutting equipment 100, pole pieces of specific size and shape are generally cut out from the pole piece strip 3 in the conveyor belt through the die-cutting device 7. During the cutting process of the die-cutting device 7, the pole piece strip 3 usually needs to be fixed, and the existing fixing method for the pole piece strip 3 is generally achieved through a vacuum adsorption structure. However, the paint powder on the pole piece strip 3 may clog the adsorption holes of the vacuum adsorption structure during the adsorption and fixation process, thereby causing the adsorption capacity of the vacuum adsorption structure to be weakened, and then causing the adsorption and fixation of the pole piece strip 3 to fail.

[0135] From the analysis of the causes of the above problems, it can be known that the use of a vacuum adsorption structure to fix the pole piece strip 3 has a good fixing effect in the early stage of the use of the vacuum adsorption structure, but with the passage of time, its fixing effect continues to decline. The use of other structures such as a clamping structure to fix the pole piece strip 3 is likely to cause damage to the coating on the pole piece strip 3, affecting product quality. It is possible to consider using a flexible positioning method to limit the movement of the pole piece strip 3 and reduce the impact on the coating on the pole piece strip 3.

[0136] For this reason, please see Figure 8 and Fig. 9 ,in, Figure 8 A simplified structural diagram of another embodiment of the pole piece die-cutting equipment provided in this application; Fig. 9 for Figure 8A plan view of the driving device and the tension roller from another perspective. In some embodiments, the pole piece die-cutting device 100 has a material strip stabilization station, and a material strip stabilization device 2 is arranged at the material strip stabilization station. The material strip stabilization device 2 includes a tension detection unit, a roller assembly 21, a driving device 22 and a control device. The tension detection unit is used to detect the tension of the pole piece material strip 3; the roller assembly 21 includes a plurality of rotating rollers 211, and the plurality of rotating rollers 211 are used for winding the pole piece material strip 3. The plurality of rotating rollers 211 include a tension roller 211a and two limit rollers 211b The two limiting rollers 211b are arranged at intervals along the first direction X and are used to support one side of the pole piece strip 3. The tension roller 211a is arranged between the two limiting rollers 211b and can be movably arranged along the second direction Y to press the other side of the pole piece strip 3; the driving device 22 has a driving part 221 that can be telescopically moved along the second direction Y, and the driving part 221 is connected to the roller shaft of the tension roller 211a; the control device is electrically connected to the driving device 22 and the tension detection part, and controls the action of the driving device 22 according to the detection signal of the tension detection part.

[0137] It should be noted that the first direction X and the second direction Y mentioned in this embodiment are two intersecting directions. The pole piece die-cutting device 100 usually provides unwinding tension for the pole piece strip 3 to ensure its stable tape running. Therefore, the pole piece die-cutting device 100 is generally also equipped with a tension control system. The tension control system can detect the unwinding tension of the pole piece strip 3. In this embodiment, the tension detection unit can also be part of the tension control system. Of course, the tension detection unit can also be set independently of the tension control system. Its main function is to measure the tension of the pole piece strip 3. The tension detection unit can usually be a tension detector. There are many specific types, which are not limited in this embodiment.

[0138] The directions of the rotation axes of the multiple rotating rollers 211 belong to the same direction, for example, a third direction intersecting with both the first direction X and the second direction Y. One of the rotating rollers 211 is set as a tension roller 211a, and the other two rotating rollers 211 are set as limiting rollers 211b. The roller shaft positions of the two limiting rollers 211b are fixed, and the roller shaft of the tension roller 211a is set on the driving part 221 of the driving device 22. The two limiting rollers 211b are supported on one side of the pole piece strip 3, and the tension roller 211a is pressed on the other side of the pole piece strip 3. Driven by the driving part 221, the tension roller 211a can press the pole piece strip 3 with different amounts of movement, thereby applying tension to it. It can be understood that the greater the amount of movement of the tension roller 211a to press the pole piece strip 3, the greater the tension the pole piece strip 3 bears, and vice versa.

[0139] The driving device 22 has a driving part 221 that is movable in the second direction Y. There are many types of such driving devices 22, such as a push rod motor, which is not limited in this embodiment; at the same time, the driving device 22 and the tension detection part are electrically connected through a control device, and its purpose is to control the action of the driving device 22 according to the detection signal feedback of the tension detection part, so as to ensure that the tension of the pole piece strip 3 is stable within an appropriate range, and prevent the pole piece strip 3 from shaking along the incoming direction during the die-cutting process.

[0140] The feedback control logic of the control device is as follows:

[0141] Acquire a detection signal from the tension detection unit, and compare a detection tension value in the detection signal with a preset tension value to obtain a tension difference between the detection tension value and the preset tension value;

[0142] The telescopic activity amount is determined according to the tension difference and a preset mapping relationship, and the activity of the driving part 221 of the driving device 22 is controlled according to the telescopic activity amount.

[0143] It should be noted that if the tension difference between the detected tension value and the preset tension value is greater than zero, it means that the tension applied by the tension roller 211a to the pole piece strip 3 exceeds the tension stability range, and the tension applied by the tension roller 211a needs to be weakened; if the tension difference between the detected tension value and the preset tension value is less than zero, it means that the tension applied by the tension roller 211a to the pole piece strip 3 does not reach the tension stability range, and the tension applied by the tension roller 211a needs to be increased. There is a preset mapping relationship between the tension difference and the telescopic activity amount. The specific composition and conversion method of the preset mapping relationship are not limited in the embodiment of the present application, as long as the telescopic activity amount matching it can be obtained according to the tension difference, so as to control the driving part 221 of the driving device 22 to move with the telescopic activity amount, and apply a tension matching the tension difference to the pole piece strip 3.

[0144] According to the above technical solution, two limiting rollers 211b are arranged at intervals along the first direction X, providing an active adjustment range for the tension roller 211a. In the active adjustment range, the tension roller 211a can press and hold the pole piece strip 3 along the second direction Y under the drive of the driving unit 221. Since the control device can control the corresponding action of the driving device 22 according to the pole piece tension detected by the tension detection unit, a feedback adjustment mechanism is formed, which can stabilize the tension of the pole piece strip 3 within a reliable range, control the tension fluctuation range of the pole piece strip 3 before die-cutting, and further control the jitter amplitude of the pole piece strip 3 along the incoming direction to ensure the die-cutting quality.

[0145] For the specific structural type of the drive device 22, please refer to Fig. 9In some embodiments, the driving device 22 includes two driving cylinders 22a, and the cylinder rods 221a of the two driving cylinders 22a correspond to the two ends of the roller shaft connected to the tension roller 211a respectively; the driving part 221 includes the cylinder rods 221a of the two driving cylinders 22a.

[0146] It should be noted that the two driving cylinders 22a should have the same size and specifications, and should be electrically connected to the control device at the same time to accept the synchronous control of the control device so that the two cylinder rods 221a can be extended and retracted synchronously.

[0147] According to the above technical solution, compared with other types of driving methods, the operation and maintenance of the driving cylinder 22a are relatively simple and easy to install. More importantly, the driving cylinder 22a can provide fast linear motion, which is suitable for the feedback adjustment scenario that requires fast response in the embodiment of the present application; by setting two driving cylinders 22a to drive the movement of the tension roller 211a from both ends of the roller shaft, it is beneficial to reduce the bending stress borne by the cylinder rod 221a, and control the deformation of the tension roller 211a to press the pole sheet strip 3, thereby improving the feedback control accuracy of the control device.

[0148] The specific types of driving cylinder 22a can be roughly divided into standard cylinder and vacuum cylinder. The standard cylinder uses the thrust of gas to push the piston rod to reciprocate in a sealed cylinder, while the vacuum cylinder is two sealed barrels to form an internal and external pressure difference, squeezing the piston rod to move. The specific structure and operating principle of the vacuum cylinder are not elaborated in the embodiment of the present application.

[0149] In some embodiments, the driving cylinder 22a comprises a vacuum cylinder.

[0150] According to the above technical solution, compared with the standard cylinder, the vacuum cylinder has a larger stroke, a larger adjustable range for the tension roller 211a, and a faster response of the vacuum cylinder, which is beneficial to improving the adjustment sensitivity and can further reduce the tension fluctuation range of the pole sheet strip 3 before die cutting.

[0151] For further information, see Fig. 9 In some embodiments, the cylinder cavities of the two driving cylinders 22a are connected to each other.

[0152] It should be noted that, depending on the specific type of the driving cylinder 22a, the two driving cylinders 22a can be connected through a ventilation pipe or a vacuum pipe 222 (such as Fig. 9 As shown in , the two driving cylinders 22a are vacuum cylinders) whose inner cavities are connected to each other.

[0153] According to the above technical solution, the cylinder cavities of the two driving cylinders 22a are interconnected, which can ensure that the internal pressures of the two driving cylinders 22a are always at the same level, improve the synchronization of the telescopic activities of the two cylinder rods 221a, and further improve the feedback control accuracy of the control device.

[0154] See also Figure 8 In some embodiments, the pole piece die-cutting device 100 further has a die-cutting station, at which a die-cutting device 7 is provided; and a material strip stabilizing station is provided adjacent to the die-cutting station.

[0155] It should be noted that in the pole piece die-cutting device 100, the specific type of the die-cutting device 7 is usually a laser die-cutting device 7. The strip stabilization station is usually arranged upstream of the die-cutting station. At this time, the pole piece strip 3 has not been die-cut yet and is a complete pole piece strip 3, and its tension is more easily controlled by the activity of the tension roller 211a.

[0156] According to the above technical solution, the material strip stabilization station is arranged adjacent to the die-cutting station, which is beneficial for the material strip stabilization device 2 to control the tension of the pole piece material strip 3 at the position closest to the die-cutting device 7, so as to ensure that the material strip stabilization device 2 controls the tension of the pole piece material strip 3 to meet the cutting requirements of the die-cutting device 7.

[0157] The present application proposes a pole piece die-cutting device 100, which includes two feeding rollers 6, a tape feed roller 5, a pole piece tape splicing device 1, a tape stabilizing device 2 and a die-cutting device 7. The pole piece tape splicing device 1 has a tape splicing station, and the pole piece tape splicing device 1 includes a glue carrier 11, two tape winding rollers 121a, a glue supply roller 13, a glue pulling portion 14 and a limiting portion 15. The glue carrier 11 has a glue carrier surface 11a, and the glue carrier surface 11a is used to position and load the adhesive tape 4; the two tape winding rollers 121a are respectively rotatably arranged to pick up the end of the pole piece tape 3 and wind the pole piece tape 3; wherein the glue carrier 11 and the two tape winding rollers 121a are at least partially able to be close to the tape splicing. The two tape rollers 121a are movably arranged in the direction of the workstation, so that the glue-carrying part 11 and the two tape rollers 121a can be located at the corresponding tape connection workstation, and the two tape rollers 121a and the glue-carrying part 11 have a relative movable stroke, so that at the tape connection workstation, the two tape rollers 121a are respectively abutted against the glue-carrying surface 11a, and are arranged at intervals along the length direction of the glue-carrying surface 11a, so that the end of the pole piece tape 3 is adhered to the adhesive tape 4, and the two tape rollers 121a can approach each other and move in a reverse direction to release the corresponding pole piece tape 3 and make it unfold and adhere to the adhesive tape 4; the glue supply roller 13 is rotatably arranged to unwind and provide the adhesive tape 4; the limiting part 15 is arranged at the first glue drawing workstation, and is used to The adhesive tape 4 pulled out from the adhesive supply roller 13 is fixed or released by limiting; the adhesive drawing part 14 moves between the first adhesive drawing station and the second adhesive drawing station to pick up the adhesive tape 4 on the limiting part 15 at the first adhesive drawing station and pull the adhesive tape 4 to the second adhesive drawing station; the adhesive carrying part 11 moves between the adhesive taking station and the tape splicing station to position and load the adhesive tape 4 at the adhesive taking station and transfer it to the tape splicing station; the two feeding rollers 6 are used to alternately unwind and provide the pole piece material tape 3 to the tape walking roller 5; there is a first material taking station between the tape walking roller 5 and each feeding roller 6, and each feeding roller 6 also has a second material taking station; the two tape winding rollers 121a of the pole piece splicing device 1 include a first The tape roller 121a and the second tape roller 121a, the first tape roller 121a moves between the first material picking station and the two tape connection stations, and is used to pick up the tail end of the pole piece tape 3 on the tape delivery roller 5 at the corresponding first material picking station; the second tape roller 121a moves between the second material picking station and the two tape connection stations, and is used to pick up the head end of the pole piece tape 3 on the full material feeding roller 6 at the corresponding second material picking station; the pole piece die-cutting equipment 100 has a tape stabilizing station, and the tape stabilizing device 2 is arranged at the tape stabilizing station, and the tape stabilizing device 2 includes a tension detection unit, a roller assembly 21, two vacuum cylinders and a control device, and the tension detection unit is used to detect the tension of the pole piece tape 3;The roller assembly 21 includes a plurality of rotating rollers 211, which are used for winding the pole piece strip 3. The plurality of rotating rollers 211 include a tension roller 211a and two limiting rollers 211b, which are arranged at intervals along the first direction X and are used to support one side of the pole piece strip 3. The tension roller 211a is arranged between the two limiting rollers 211b and can be movably arranged along the second direction Y to press the other side of the pole piece strip 3. The vacuum cylinder has a cylinder rod 221a that is telescopically movable along the second direction Y. The cylinder rods 221a of the two vacuum cylinders are respectively connected to the two ends of the roller shaft of the tension roller 211a, and the inner cavities of the two vacuum cylinders are connected to each other. The control device is electrically connected to the driving device 22 and the tension detection unit, and controls the two vacuum cylinders to act synchronously according to the detection signal of the tension detection unit. ;

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A pole piece strip connecting device for connecting two pole piece strips, characterized in that: The pole piece tape connection device has a tape connection station, and the pole piece tape connection device includes: The adhesive carrying portion has an adhesive carrying surface, and the adhesive carrying surface is used to position and load the adhesive tape; and Two tape connecting parts, the tape connecting parts are used to pick up the end of the pole piece material tape, at least one of the two tape connecting parts is set as a tape winding roller, and the tape winding roller is rotatably set to wind the corresponding pole piece material tape; Wherein, at least part of the glue carrying portion and the two tape connecting portions can be movably arranged in a direction close to the tape connecting station, so that the glue carrying portion and the two tape connecting portions can be located at the tape connecting station correspondingly; At the tape connection station, the two tape connection parts and the adhesive carrier part have a relative movable stroke, so that the two tape connection parts are respectively abutted against the adhesive carrier surface, and the ends of the two electrode strips are adhered to the adhesive tape; At the tape splicing station, the two tape splicing parts are spaced apart along the length direction of the adhesive carrier surface, wherein the tape winding roller can be reversed close to the other tape splicing part to release the corresponding electrode material tape and unfold it to adhere to the adhesive tape.

2. The pole piece connection device according to claim 1, characterized in that: The electrode tape connection device also has a glue taking station, a first glue drawing station and a second glue drawing station, wherein the first glue drawing station and the second glue drawing station are respectively located at opposite sides of the glue taking station; The pole piece connecting device also includes: A rotatably arranged adhesive supply roller, the adhesive supply roller being used for unwinding and providing the adhesive tape; and The adhesive drawing unit moves between the first adhesive drawing station and the second adhesive drawing station to pick up the adhesive tape on the adhesive supply roller at the first adhesive drawing station and draw the adhesive tape to the second adhesive drawing station; The adhesive carrier moves between the adhesive taking station and the tape splicing station to position and load the adhesive tape at the adhesive taking station and transfer the adhesive tape to the tape splicing station.

3. The pole piece connection device according to claim 2, characterized in that: The pole piece tape connection device further comprises a limiting part, which is arranged at the first glue drawing station and is used for limiting and fixing or loosening the adhesive tape drawn from the glue supply roller; The adhesive drawing unit draws the adhesive tape from the limiting portion at the first adhesive drawing station.

4. The pole piece connection device according to claim 2, characterized in that: The electrode tape connection device further comprises a glue cutting part, which can be located corresponding to the glue taking station and is used for cutting the adhesive tape after the adhesive carrying surface of the adhesive carrying part is positioned and loaded with the adhesive tape at the glue taking station.

5. The pole piece connection device according to claim 4, characterized in that: The adhesive cutting part is arranged on the side of the adhesive carrying part adjacent to the adhesive carrying surface, and the adhesive cutting part can be extended and retracted in the direction of the adhesive carrying surface to cut the adhesive tape.

6. The pole piece connection device according to any one of claims 1 to 5, characterized in that: The pole piece tape splicing device further comprises a first material taking station and a second material taking station, wherein the first material taking station and the second material taking station are arranged away from the tape splicing station; The two connecting parts include: A first tape splicing unit is movable between the first material taking station and the tape splicing station, and is used to take the tail end of the pole piece tape on the tape roller at the first material taking station and pull it to the tape splicing station; and The second tape splicing part moves between the second material taking station and the tape splicing station, and is used for taking the head end of the pole piece tape on the full material feeding roller at the second material taking station and pulling it to the tape splicing station.

7. The pole piece connection device according to any one of claims 1 to 5, characterized in that: The adhesive carrying surface of the adhesive carrying part is provided with a plurality of vacuum adsorption holes.

8. The pole piece connection device according to any one of claims 1 to 5, characterized in that: The winding roller comprises two clamping parts, which are arranged opposite to each other in the radial direction of rotation of the winding roller and can move close to each other to clamp the pole piece strip therebetween.

9. A pole piece die cutting device, characterized in that: It comprises a pole piece connecting device as claimed in any one of claims 1 to 8.

10. The pole piece die cutting device according to claim 9, characterized in that: The pole piece die-cutting equipment further comprises a tape-feeding roller and a material-feeding roller, wherein the material-feeding roller is used to provide the pole piece material strip to the tape-feeding roller for unwinding; The pole piece tape connection device comprises a first material taking station and a second material taking station, wherein the first material taking station is located between the tape walking roller and the material feeding roller, and the second material taking station is arranged corresponding to the material feeding roller; The two connecting parts of the pole piece connecting device include: A first tape connection part moves between the first material taking station and the tape connection station, and is used to connect the tail end of the pole piece tape on the tape roller at the first material taking station; and The second tape connection part moves between the second material taking station and the tape connection station, and is used for connecting the head end of the pole piece tape on the full material feeding roller at the second material taking station.

11. The pole piece die cutting device according to claim 10, characterized in that: Two feeding rollers are provided, and the two feeding rollers are used to alternately feed materials to the belt-walking roller; Two of the first material retrieving stations and two of the second material retrieving stations are respectively provided; The first belt splicing unit moves between the belt splicing station and the two first material taking stations; The second belt splicing part moves between the belt splicing station and the two second material taking stations.

12. The pole piece die cutting device according to claim 9, characterized in that: The pole piece die-cutting equipment has a material strip stabilization station, and a material strip stabilization device is arranged at the material strip stabilization station, and the material strip stabilization device includes: A tension detection unit, used to detect the tension of the pole piece strip; A roller assembly, comprising a plurality of rotating rollers, the plurality of rotating rollers are used for winding the pole piece strip, the plurality of rotating rollers include a tension roller and two limiting rollers, the two limiting rollers are arranged at intervals along a first direction and are used to support one side of the pole piece strip, the tension roller is arranged between the two limiting rollers and can be movably arranged along a second direction to press the other side of the pole piece strip; A driving device includes a driving portion that is telescopically movable along the second direction, wherein the driving portion is connected to the roller shaft of the tension roller; and The control device is electrically connected to the driving device and the tension detection unit, and controls the driving device to operate according to a detection signal from the tension detection unit.

13. The pole piece die cutting device according to claim 12, characterized in that: The driving device comprises two driving cylinders, and the cylinder rods of the two driving cylinders are respectively connected to the two ends of the roller shaft of the tension roller; The driving part includes two cylinder rods of the driving cylinders.

14. The pole piece die cutting device according to claim 13, characterized in that: The cylinder inner chambers of the two driving cylinders are communicated with each other.

15. The pole piece die cutting device according to any one of claims 12 to 14, characterized in that: The pole piece die-cutting equipment also has a die-cutting station, and a die-cutting device is arranged at the die-cutting station; The strip stabilizing station is disposed adjacent to the die cutting station.

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