Pole piece forming equipment and pole piece forming method

Abstract

The present application relates to a pole piece forming device and a pole piece forming method, and belongs to the field of battery manufacturing technology. The pole piece forming device comprises: a die-cutting device, which is used to cut a pole ear on the pole piece, and the pole ear protrudes from the first edge of the pole piece; a gluing device, which is arranged downstream of the die-cutting device along the tape running direction of the pole piece, and the gluing device is used to stick a tape on the pole piece and wrap the tape around the first edge. The pole piece forming device can improve the safety of the battery.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a pole piece forming device and a pole piece forming method. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In the development of battery technology, in addition to improving battery performance, safety is also an issue that cannot be ignored. How to enhance battery safety is a technical problem that needs to be solved urgently in battery technology. Summary of the invention

[0004] The purpose of the present application is to provide a pole piece forming device and a pole piece forming method. The pole piece forming device can improve the safety of the battery.

[0005] This application is achieved through the following technical solutions:

[0006] On the one hand, the present application provides a pole piece forming equipment, including: a die-cutting device, used to cut a pole ear on the pole piece, and the pole ear protrudes from the first edge of the pole piece; a gluing device, along the tape running direction of the pole piece, the gluing device is arranged downstream of the die-cutting device, and the gluing device is used to stick a tape on the pole piece and make the tape wrap the first edge.

[0007] According to the pole piece forming equipment of the embodiment of the present application, after the pole ear is cut out on the pole piece by the die-cutting device, the first edge is the cutting edge, and burrs are generated here due to the cutting, which are pasted on the pole piece by tape, and the tape wraps the first edge. The tape blocks the burrs to avoid exposing the burrs, which can reduce the risk of burrs piercing the diaphragm. The tape plays a protective role and is beneficial to improving the safety of the battery.

[0008] According to some embodiments of the present application, the tape includes a first sub-tape and a second sub-tape; the gluing device includes: a first providing mechanism, used to provide the first sub-tape to one side of the pole piece in the thickness direction; a second providing mechanism, used to provide the second sub-tape to the other side of the pole piece in the thickness direction; a first pressing mechanism, used to press the first sub-tape, the second sub-tape and the pole piece, so that the first sub-tape and the second sub-tape are respectively pasted on both sides of the thickness direction of the pole piece, and the part of the first sub-tape exceeding the first edge is bonded to the part of the second sub-tape exceeding the first edge to wrap the first edge.

[0009] In the above scheme, the first edge is wrapped by sticking the first sub-tape and the second sub-tape on both sides of the thickness direction of the pole piece respectively, and the portion of the first sub-tape exceeding the first edge is bonded to the portion of the second sub-tape exceeding the first edge, so as to facilitate operation and have a better wrapping effect on the first edge. At the same time, it can also increase the strength of the pole piece and avoid folding of the first edge of the pole piece, so as to avoid short circuit caused by contact of the pole ear with the adjacent pole piece of opposite polarity after bending.

[0010] According to some embodiments of the present application, the first pressing mechanism includes: a pair of first pressing wheels, respectively arranged on both sides of the thickness direction of the pole piece; and a first driving member, used to drive the pair of first pressing wheels to move closer to or away from each other.

[0011] In the above scheme, a pair of first pressure wheels are arranged on both sides of the thickness direction of the pole piece, and the first driving member can drive the pair of first pressure wheels to approach or move away from each other. The structure is simple and the operation is convenient. When the pair of first pressure wheels are close to each other, the first sub-tape and the second sub-tape can be pressed on both sides of the thickness direction of the pole piece to ensure that the first sub-tape and the second sub-tape have a good bonding effect with the pole piece; when the pair of first pressure wheels are away from each other, the first sub-tape, the pole piece and the second sub-tape can pass through between the pair of first pressure wheels, which is convenient for maintenance operations.

[0012] According to some embodiments of the present application, each of the first pressure wheels includes a first pressure wheel body and a first buffer layer arranged on the outer peripheral surface of the first pressure wheel body, the first buffer layer includes a first buffer segment, a second buffer segment and a third buffer segment distributed in sequence along the axial direction of the first pressure wheel body, the thickness of the third buffer segment is greater than the thickness of the first buffer segment, the second buffer segment connects the first buffer segment and the third buffer segment, and the thickness of the second buffer segment gradually increases along the direction from the first buffer segment to the third buffer segment, and the third buffer segment is used to press the portion of the first sub-tape that exceeds the first edge with the portion of the second sub-tape that exceeds the first edge.

[0013] In the above scheme, through the deformation of the first buffer layer, the force applied to the first sub-tape, the second sub-tape and the electrode by the two first pressure wheels approaching each other can be buffered, so that the first sub-tape and the second sub-tape are firmly adhered to the electrode; at the same time, the structural forms of the first buffer segment, the second buffer segment and the third buffer segment match the structure of the active material layer coated on the electrode, and the third buffer segment can press the part of the first sub-tape that exceeds the first edge with the part of the second sub-tape that exceeds the first edge, so as to ensure that the first sub-tape and the second sub-tape are firmly bonded to achieve wrapping of the first edge.

[0014] According to some embodiments of the present application, the glue laminating device also includes: a first tension roller, which is arranged between the first providing mechanism and the first lamination mechanism along the running direction of the first sub-tape, and the first tension roller is used to tension the first sub-tape; a second tension roller, which is arranged between the second providing mechanism and the first lamination mechanism along the running direction of the second sub-tape, and the second tension roller is used to tension the second sub-tape.

[0015] In the above scheme, the first tension roller provides tensioning force for the first sub-tape, and the second tension roller provides tensioning force for the second sub-tape, so that the first sub-tape and the second sub-tape are stretched to ensure that the first sub-tape and the second sub-tape are pasted on the pole piece in a stretched state, avoiding wrinkles on the first sub-tape and the second sub-tape, and ensuring the pasting effect.

[0016] According to some embodiments of the present application, the glue laminating device also includes: a heating mechanism, which is arranged downstream of the first laminating mechanism along the tape running direction of the pole piece, and is used to heat the pole piece, the first sub-tape and the second sub-tape; a second laminating mechanism, which is arranged downstream of the heating mechanism along the tape running direction of the pole piece, and is used to laminarize the first sub-tape, the second sub-tape and the pole piece.

[0017] In the above scheme, the electrode, the first sub-tape and the second sub-tape are heated by a heating mechanism to improve the viscosity of the first sub-tape and the second sub-tape, and the heated first sub-tape, the second sub-tape and the electrode are pressed together by a second pressing mechanism to improve the bonding quality between the first sub-tape and the second sub-tape and the electrode.

[0018] According to some embodiments of the present application, the second pressing mechanism includes: a pair of second pressing wheels, respectively arranged on both sides of the thickness direction of the pole piece; and a second driving member, used to drive the pair of second pressing wheels to move closer to or away from each other.

[0019] In the above scheme, a pair of second pressure wheels are respectively arranged on both sides of the thickness direction of the pole piece, and the second driving member drives the pair of second pressure wheels to approach or move away from each other, so as to realize the pasting operation of the first sub-tape and the second sub-tape to the pole piece. The structure is simple and the operation is convenient. When the pair of second pressure wheels are close to each other, the first sub-tape and the second sub-tape can be pressed onto the pole piece. When the pair of second pressure wheels are away from each other, the first sub-tape, the pole piece and the second sub-tape can pass through between the pair of second pressure wheels, which is convenient for maintenance operations.

[0020] According to some embodiments of the present application, the glue laminating device also includes: a first detection mechanism, which is arranged between the first lamination mechanism and the heating mechanism along the running direction of the first sub-tape, and the first detection mechanism is used to obtain first information whether the first sub-tape is adhered to the electrode piece; a second detection mechanism, which is arranged between the first lamination mechanism and the heating mechanism along the running direction of the second sub-tape, and the second detection mechanism is used to obtain second information whether the second sub-tape is adhered to the electrode piece.

[0021] In the above scheme, the first information of whether the first sub-tape is adhered to the pole piece is obtained by the first detection mechanism, and the information of the first sub-tape on the pole piece can be grasped, so that an abnormal signal can be sent when the first sub-tape on the pole piece is broken, so that the machine can be stopped in time to replenish the first sub-tape, thereby ensuring the continuity of the first sub-tape on the pole piece; the second information of whether the second sub-tape is adhered to the pole piece is obtained by the second detection mechanism, and the information of the second sub-tape on the pole piece can be grasped, so that an abnormal signal can be sent when the second sub-tape on the pole piece is broken, so that the machine can be stopped in time to replenish the second sub-tape, thereby ensuring the continuity of the second sub-tape on the pole piece.

[0022] According to some embodiments of the present application, the electrode forming equipment also includes: an electrode conveying mechanism for conveying the electrode; a controller for controlling the start or stop of the electrode conveying mechanism according to the first information obtained by the first detection mechanism, and / or for controlling the start or stop of the electrode conveying mechanism according to the second information obtained by the second detection mechanism.

[0023] In the above scheme, the electrode is transported by the electrode conveying mechanism to improve production efficiency; the first sub-tape and the second sub-tape are monitored in real time through the cooperation of the controller with the first detection mechanism, the second detection mechanism and the electrode conveying mechanism. When the first sub-tape and / or the second sub-tape on the electrode is broken, the electrode conveying mechanism is stopped in time to replenish the first sub-tape and / or the second sub-tape to ensure the continuity of the first sub-tape and the second sub-tape on the electrode.

[0024] According to some embodiments of the present application, the glue laminating device also includes: a first clamping mechanism, which is arranged between the first detection mechanism and the heating mechanism along the running direction of the first sub-tape, and is used to clamp the leading end of the next section of the first sub-tape and pull the first sub-tape to move along the running direction of the pole piece so that the leading end of the next section of the first sub-tape covers the end of the previous section of the first sub-tape; and / or a second clamping mechanism, which is arranged between the second detection mechanism and the heating mechanism along the running direction of the second sub-tape, and is used to clamp the leading end of the next section of the second sub-tape and pull the second sub-tape to move along the running direction of the pole piece so that the leading end of the next section of the second sub-tape covers the end of the previous section of the second sub-tape.

[0025] In the above scheme, by clamping the leading end of the next section of the first sub-tape and pulling the first sub-tape to move, the leading end of the next section of the first sub-tape can cover the end of the previous section of the first sub-tape, ensuring that the first sub-tape is continuous on the pole piece; by clamping the leading end of the next section of the second sub-tape and pulling the second sub-tape to move, the leading end of the next section of the second sub-tape can cover the end of the previous section of the second sub-tape, ensuring that the second sub-tape is continuous on the pole piece.

[0026] According to some embodiments of the present application, the glue-applying device also includes: a first glue-applying driving roller, which is arranged between the first providing mechanism and the first pressing mechanism along the running direction of the first sub-tape, and the first glue-applying driving roller is used to drive the first sub-tape to move; and / or a second glue-applying driving roller, which is arranged between the second providing mechanism and the first pressing mechanism along the running direction of the second sub-tape, and the second glue-applying driving roller is used to drive the second sub-tape to move.

[0027] In the above scheme, the first sub-tape is driven to move by the first glue-releasing driving roller, which provides power for the movement of the first sub-tape, so that the moving speed of the first sub-tape matches the tape running speed of the pole piece, thereby ensuring that the first sub-tape bonded to the pole piece is in a stretched state; the second sub-tape is driven to move by the second glue-releasing driving roller, which provides power for the movement of the second sub-tape, so that the moving speed of the second sub-tape matches the tape running speed of the pole piece, thereby ensuring that the second sub-tape bonded to the pole piece is in a stretched state.

[0028] According to some embodiments of the present application, the glue laminating device also includes: a third detection mechanism, which is arranged between the first providing mechanism and the first pressing mechanism along the running direction of the first sub-tape, and the third detection mechanism is used to obtain edge information of the pole piece; a first deviation correcting mechanism, which is arranged between the first providing mechanism and the first pressing mechanism along the running direction of the first sub-tape, and the first deviation correcting mechanism is used to adjust the position of the first sub-tape according to the edge information obtained by the third detection mechanism.

[0029] In the above scheme, the edge information of the pole piece is detected by the third detection mechanism, and the tape deviation of the pole piece is grasped, so that the first correction mechanism can adjust the position of the first sub-tape according to the edge information of the pole piece, and calibrate the position of the first sub-tape before it is pasted on the pole piece to ensure the accurate bonding position of the first sub-tape and the pole piece.

[0030] According to some embodiments of the present application, the glue laminating device also includes: a fourth detection mechanism, which is arranged between the second providing mechanism and the first pressing mechanism along the running direction of the second sub-tape, and the fourth detection mechanism is used to obtain edge information of the pole piece; a second correcting mechanism, which is arranged between the second providing mechanism and the first pressing mechanism along the running direction of the second sub-tape, and the second correcting mechanism is used to adjust the position of the second sub-tape according to the edge information obtained by the fourth detection mechanism.

[0031] In the above scheme, the edge information of the pole piece is detected by the fourth detection mechanism to grasp the tape deviation of the pole piece, so that the second correction mechanism can adjust the position of the second sub-tape according to the edge information of the pole piece, and calibrate the position of the first sub-tape before the first sub-tape is pasted on the pole piece to ensure the accurate bonding position of the second sub-tape and the pole piece.

[0032] In a second aspect, an embodiment of the present application provides a method for forming a pole piece, which includes cutting a pole ear on the pole piece so that the pole ear protrudes from a first edge of the pole piece; sticking a tape on the cut pole piece and wrapping the tape around the first edge.

[0033] According to the pole piece forming method of the embodiment of the present application, by sticking tape on the pole piece and wrapping the tape around the first edge of the pole piece formed, the burrs generated after the pole piece is cut from the pole ear can be effectively isolated, thereby preventing the burrs from piercing the diaphragm during the battery manufacturing process and improving the safety of the battery.

[0034] According to some embodiments of the present application, the step of sticking the tape on the cut pole piece and making the tape wrap the first edge includes: sticking the first sub-tape and the second sub-tape on opposite sides of the thickness direction of the pole piece respectively, and making the part of the first sub-tape exceeding the first edge bond with the part of the second sub-tape exceeding the first edge to wrap the first edge.

[0035] In the above solution, the first sub-tape and the second sub-tape are respectively adhered to the opposite sides of the electrode in the thickness direction, which is simple to operate and can ensure the wrapping effect of the first edge.

[0036] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A schematic diagram of the structure of a pole piece forming device provided in one embodiment of the present application;

[0039] Figure 2 A schematic diagram of the structure of a pole piece provided in some embodiments of the present application;

[0040] Figure 3 A schematic diagram of a tape being adhered to a pole piece according to some embodiments of the present application;

[0041] Figure 4 A schematic diagram of the distribution of tapes on a pole piece provided according to some embodiments of the present application;

[0042] Figure 5 It is a structural schematic diagram of a glue sticking device provided according to some embodiments of the present application;

[0043] Figure 6 A schematic diagram of a tape being attached to a pole piece according to other embodiments of the present application;

[0044] Figure 7 A schematic diagram of the distribution of adhesive tapes on a pole piece according to other embodiments of the present application;

[0045] Figure 8 It is a schematic structural diagram of a first pressing wheel provided according to some embodiments of the present application;

[0046] Fig. 9 for Figure 8 A local enlarged view of point A;

[0047] Fig.10 It is a structural schematic diagram of a glue sticking device provided according to some other embodiments of the present application;

[0048] Fig.11 It is a structural schematic diagram of a pole piece forming device provided according to some other embodiments of the present application;

[0049] Fig.12 A schematic flow chart of a pole piece forming method provided for some embodiments of the present application.

[0050] Icons: 100-die cutting device; 200-glue laminating device; 211-first providing mechanism; 212-second providing mechanism; 220-first pressing mechanism; 221-first driving member; 222-first pressing wheel; 2221-first pressing wheel body; 2222-first buffer layer; 22221-first buffer section; 22222-second buffer section; 22223-third buffer section; 231-first tension roller; 232-second tension roller; 240-heating mechanism; 250-second pressing mechanism; 251-second driving member; 252-second pressing wheel; 261-first detection mechanism; 262-second detection mechanism; 2 63-third detection mechanism; 264-fourth detection mechanism; 271-first clamping mechanism; 272-second clamping mechanism; 281-first glue release driving roller; 282-second glue release driving roller; 283-first pressure roller; 284-second pressure roller; 291-first deviation correction mechanism; 292-second deviation correction mechanism; 300-tape; 310-first sub-tape; 320-second sub-tape; 400-pole piece; 410-pole ear; 420-first edge; 430-current collector; 440-active material layer; 500-pole piece conveying mechanism; 510-pole piece unwinding roller; 520-pole piece winding roller; 600-controller. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application 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 drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0053] Reference to "embodiments" in this application 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 in this application may be combined with other embodiments.

[0054] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0056] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0057] In this application, the battery mentioned herein refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack, etc.

[0058] The core component of a battery that can achieve repeated charge and discharge functions is the electrode assembly in the battery cell, which includes a positive electrode sheet, a negative electrode sheet and a separator, which is usually arranged between the positive electrode sheet and the negative electrode sheet. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work.

[0059] The positive electrode sheet includes a positive current collector and a positive active material layer coated on the surface of the positive current collector, and a positive electrode tab is cut from the positive current collector that is not coated with the positive active material layer. Generally, in lithium-ion batteries, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc.

[0060] The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer coated on the surface of the negative electrode current collector, and a negative electrode tab is cut from the negative electrode current collector that is not coated with the negative electrode active material layer. Generally, in lithium-ion batteries, the negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon.

[0061] The material of the diaphragm can be PP (polypropylene) or PE (polyethylene) and the like.

[0062] During the forming process of the pole piece, after the active material layer is coated on the current collector, the area of ​​the current collector not coated with the active material layer is cut to form a pole ear, which protrudes from the first edge (cut edge) of the pole piece. During the battery manufacturing process, in order to avoid short circuit between the positive pole piece and the negative pole piece, the height of the separator disposed between the positive pole piece and the negative pole piece usually exceeds the first edge.

[0063] The development of battery technology must take into account multiple design factors at the same time, such as performance parameters such as energy density, discharge capacity, and charge and discharge rate. In addition, safety must also be considered.

[0064] There are many factors that affect battery safety, such as untimely pressure relief during thermal runaway, internal short circuit, etc. Among them, the situation that causes internal short circuit includes the contact between the positive electrode and the negative electrode. Usually, the positive electrode and the negative electrode are separated by a diaphragm. When the diaphragm is damaged, the positive electrode is easy to contact with the negative electrode and cause a short circuit.

[0065] The inventors found that during the battery manufacturing process, when the pole piece is formed, a die-cutting device is usually used to cut the pole ear on the pole piece. Since the pole piece is a metal foil, burrs will be generated on the cutting edge of the pole piece (such as the first edge) during the cutting process. The burrs can easily pierce the diaphragm and cause damage to the diaphragm, thereby causing the risk of short circuit between the positive pole piece and the negative pole piece. Although in the prior art, the burrs are regularly inspected during the pole piece forming process, the regular inspection will inevitably cause edge burrs, and it is impossible to detect whether the burrs exceed the specification range in time, which poses a hidden danger to the safety of the battery. At the same time, even if regular inspections are performed, only larger burrs are corrected, and small burrs have no effect. Small burrs will still remain, and there is still a risk of piercing the diaphragm.

[0066] In view of this, in order to solve the problem that burrs easily pierce the diaphragm and cause battery safety risks, the inventor has designed a pole piece forming device after in-depth research. After cutting the pole ear on the pole piece, a tape is pasted on the pole piece so that the tape wraps the first edge (cut edge) of the pole piece. The tape wraps the first edge to shield the burrs on the first edge, which is equivalent to forming a protective layer between the burrs and the diaphragm, reducing the difficulty of the burrs piercing the diaphragm and improving the safety of the battery.

[0067] The pole piece manufactured by the above-mentioned pole piece forming equipment can effectively shield the burrs on the first edge. After the pole piece and the diaphragm form an electrode assembly, it is more difficult for the burrs to pierce the diaphragm, thereby reducing the probability of contact between adjacent positive and negative pole pieces. After the battery is prepared using this pole piece, the battery has higher safety.

[0068] See also Figure 1 , Figure 1 A schematic diagram of the structure of a pole piece forming device provided for one embodiment of the present application. According to some embodiments of the present application, the present application provides a pole piece forming device, which includes a die-cutting device 100 and a gluing device 200. The die-cutting device 100 is used to cut a pole ear 410 on a pole piece 400, and the pole ear 410 protrudes from a first edge 420 of the pole piece 400. Along the tape running direction of the pole piece 400, the gluing device 200 is arranged downstream of the die-cutting device 100, and the gluing device 200 is used to stick the tape 300 on the pole piece 400, and make the tape 300 wrap the first edge 420.

[0069] The die-cutting device 100 is a device for cutting the pole piece 400 to form the pole ear 410. The die-cutting device 100 can specifically cut the pole piece 400 using a laser or a knife, and this application does not make any limitation here. According to the requirements, the die-cutting device 100 can cut the pole ear 410 of the required contour on the pole piece 400. Generally, the pole ear 410 is located at the edge of the pole piece 400 to facilitate electrical connection with other components.

[0070] See also Figure 2 , Figure 2 This is a schematic structural diagram of a pole piece 400 provided according to some embodiments of the present application. As shown in the figure, the pole ear 410 protrudes from the first edge 420 .

[0071] The first edge 420 is a cutting edge formed after the pole piece 400 is cut out of the pole lug 410. When cutting the pole piece 400, the first edge 420 is used as a cutting boundary, and the portion beyond the first edge 420 and located between two adjacent pole lugs 410 is cut off, so that the first pole lug 410 protrudes from the first edge 420 of the pole piece 400.

[0072] During the forming process of the pole piece 400 , in order to improve production efficiency, the pole piece 400 is generally a continuous belt-shaped structure, and the conveying direction of the pole piece 400 is also the belt running direction of the pole piece 400 .

[0073] Upstream and downstream refer to the front and back order of the process sequence respectively. For example, along the tape running direction of the pole piece 400, the gluing device 200 is arranged downstream of the die-cutting device 100, which means that in the molding process of the pole piece 400, the pole piece 400 first passes through the die-cutting device 100, is cut at the die-cutting device 100, and then the pole piece 400 passes through the gluing device 200, and the tape 300 is pasted at the gluing device 200.

[0074] See also Figure 3 , Figure 3 FIG. 4 is a schematic diagram of a tape 300 provided in some embodiments of the present application being attached to a pole piece 400. Figure 3 As shown, the tape 300 wrapping the first edge 420 means that the tape 300 wraps the first edge 420 to prevent the first edge 420 from being exposed. In other words, the first edge 420 is blocked by the tape 300 .

[0075] The electrode sheet 400 is divided into a positive electrode sheet and a negative electrode sheet. In the manufacturing process of the battery, the positive electrode sheet and the negative electrode sheet are wound or stacked to form an electrode assembly, and a separator (not shown in the figure) is usually provided between the positive electrode sheet and the negative electrode sheet. The separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid short circuit. The material of the separator can be PP (polypropylene) or PE (polyethylene).

[0076] According to the pole piece forming equipment of the embodiment of the present application, after the pole piece 400 is cut by the die-cutting device 100 to form the pole ear 410, the first edge 420 is the cutting edge, and the first edge 420 generates burrs due to cutting, which are pasted on the pole piece 400 by the tape 300, and the tape 300 wraps the first edge 420, and the tape 300 blocks the burrs to avoid the burrs being exposed; after the pole piece 400 and the diaphragm form an electrode assembly, the tape 300 wraps the first edge 420, which is equivalent to forming a protective layer between the burrs and the diaphragm, reducing the difficulty of the burrs piercing the diaphragm, reducing the probability of contact between adjacent positive and negative pole pieces, and improving the safety of the battery.

[0077] See also Figure 4 , Figure 4 Schematic diagram of the distribution of the tape 300 on the pole piece 400 according to some embodiments of the present application. According to some embodiments of the present application, optionally, as Figure 4 As shown, there can be multiple tapes 300, each tape 300 is located between two adjacent pole ears 410, one end of the tape 300 is adhered to one side of the thickness direction of the pole piece 400, and the other end of the tape 300 is folded over and adhered to the other side of the thickness direction of the pole piece 400, so that the tape 300 wraps the first edge 420.

[0078] See also Figure 5 and Figure 6 , Figure 5 is a schematic diagram of the structure of a glue sticking device 200 provided according to some embodiments of the present application. Figure 6 Schematic diagram of the tape 300 provided in some other embodiments of the present application being attached to the pole piece 400. According to some embodiments of the present application, optionally, as Figure 5 and Figure 6 As shown, the adhesive tape 300 includes a first sub-adhesive tape 310 and a second sub-adhesive tape 320, and the adhesive laminating device 200 includes a first providing mechanism 211, a second providing mechanism 212 and a first pressing mechanism 220. The first providing mechanism 211 is used to provide the first sub-adhesive tape 310 to one side of the thickness direction of the pole piece 400. The second providing mechanism 212 is used to provide the second sub-adhesive tape 320 to the other side of the thickness direction of the pole piece 400. Figure 6 As shown, the first pressing mechanism 220 is used to press the first sub-tape 310, the second sub-tape 320 and the pole piece 400, so that the first sub-tape 310 and the second sub-tape 320 are respectively adhered to both sides of the thickness direction of the pole piece 400, and the part of the first sub-tape 310 that exceeds the first edge 420 is bonded to the part of the second sub-tape 320 that exceeds the first edge 420 to wrap the first edge 420.

[0079] The first providing mechanism 211 is a component for providing the first sub-tape 310 . For example, the first providing mechanism 211 may be a unwinding roller structure, and the first sub-tape 310 is disposed on the first providing mechanism 211 .

[0080] The second providing mechanism 212 is a component for providing the second sub-tape 320 . For example, the second providing mechanism 212 may be a unwinding roller structure, and the second sub-tape 320 is disposed on the second providing mechanism 212 .

[0081] The first providing mechanism 211 and the second providing mechanism 212 cooperate to provide the first sub-tape 310 and the second sub-tape 320 on both sides of the thickness direction of the pole piece 400, respectively, so that the first sub-tape 310 and the second sub-tape 320 can be adhered to the pole piece 400 on both sides of the thickness direction of the pole piece 400.

[0082] The first pressing mechanism 220 is a component that presses the first sub-tape 310 and the second sub-tape 320 onto the pole piece 400 on both sides of the thickness direction of the pole piece 400. When the first sub-tape 310 is pasted onto the pole piece 400 from one side of the thickness direction of the pole piece 400, part of the first sub-tape 310 protrudes from the first edge 420, that is, part of the first sub-tape 310 exceeds the first edge 420, and this part of the first sub-tape 310 is not bonded to the pole piece 400. Similarly, when the second sub-tape 320 is pasted onto the pole piece 400 from the other side of the thickness direction of the pole piece 400, part of the second sub-tape 320 protrudes from the first edge 420, that is, part of the second sub-tape 320 exceeds the first edge 420, and this part of the second sub-tape 320 is not bonded to the pole piece 400. The portion of the first sub-tape 310 that exceeds the first edge 420 and the portion of the second sub-tape 320 that exceeds the first edge 420 are bonded together under the action of the first pressing mechanism 220 , thereby wrapping the first edge 420 .

[0083] By pasting the first sub-tape 310 and the second sub-tape 320 on both sides of the thickness direction of the pole piece 400, and the part of the first sub-tape 310 that exceeds the first edge 420 and the part of the second sub-tape 320 that exceeds the first edge 420 are bonded, the first edge 420 is wrapped, which is easy to operate and has a good wrapping effect on the first edge 420. In addition, the first sub-tape 310 and the second sub-tape 320 are pasted on both sides of the thickness direction of the pole piece 400, so that the first sub-tape 310 and the second sub-tape 320 have a large contact area with the pole piece 400, ensuring that the first sub-tape 310 and the second sub-tape 320 are firmly connected to the pole piece 400, providing a positioning basis for fixing the first sub-tape 310 and the second sub-tape 320, and can also increase the strength of the pole piece 400, avoiding the first edge 420 of the pole piece 400 from folding, so as to avoid the pole ear 410 from being bent and contacting and short-circuiting with the pole ear 410 of the adjacent pole piece 400 with the opposite polarity.

[0084] like Figure 3 and Figure 6 As shown, the pole piece 400 includes a current collector 430 and an active material layer 440 coated on the surface of the current collector 430 , and a pole ear 410 is cut out of the current collector 430 not coated with the active material layer 440 .

[0085] In the embodiment where there are multiple tapes 300 and each tape 300 is located between two adjacent tabs 410, the tape 300 can be attached to the surface of the current collector 430 and the surface of the active material layer 440, or, as Figure 3 As shown, the tape 300 may also be only attached to the surface of the current collector 430 , as long as the tape 300 and the electrode sheet 400 are firmly connected.

[0086] In the embodiment where the tape 300 includes the first sub-tape 310 and the second sub-tape 320, the first sub-tape 310 may be attached only to the surface of the current collector 430, or Figure 6 As shown, the first sub-tape 310 can also be attached to the surface of the current collector 430 and the surface of the active material layer 440; similarly, the second sub-tape 320 can be attached only to the surface of the current collector 430, or, as shown in FIG. Figure 6 As shown, the second sub-tape 320 may also be attached to the surface of the current collector 430 and the surface of the active material layer 440 .

[0087] It should be noted that the first sub-tape 310 and the second sub-tape 320 attached to the pole piece 400 may be continuous or discontinuous. Optionally, the first sub-tape 310 and the second sub-tape 320 attached to the pole piece 400 are continuous; for example, the tape 300 located on one side of the pole piece 400 is the first sub-tape 310, see Figure 7 , Figure 7This is a schematic diagram of the distribution of the tape 300 on the pole piece 400 provided according to some other embodiments of the present application. As shown in the figure, the first sub-tape 310 is continuous on the pole piece 400 .

[0088] According to some embodiments of the present application, optionally, Figure 5 As shown, the first pressing mechanism 220 includes a first driving member 221 and a pair of first pressing wheels 222. The pair of first pressing wheels 222 are respectively disposed on both sides of the thickness direction of the pole piece 400, and the first driving member 221 is used to drive the pair of first pressing wheels 222 to move closer to or away from each other.

[0089] A pair of first pressing wheels 222 refers to two pressing wheel structures that are arranged opposite to each other and are used to press the first sub-tape 310, the second sub-tape 320 and the pole piece 400. The two first pressing wheels 222 are respectively located on both sides of the thickness direction of the pole piece 400, and a space for accommodating the first sub-tape 310, the second sub-tape 320 and the pole piece 400 is formed between the two first pressing wheels 222. By adjusting the gap between the two first pressing wheels 222, the force applied by the first pressing wheels 222 on the first sub-tape 310, the second sub-tape 320 and the pole piece 400 can be adjusted.

[0090] The first driving member 221 is a power component, which is used to drive a pair of first pressing wheels 222 to move closer to or away from each other. The first driving member 221 can be a cylinder, a hydraulic cylinder, an electric push rod, etc., or can be a combination of a motor and a transmission component, and the transmission component can be a bidirectional lead screw, a gear rack, etc. Optionally, the first driving member 221 can be a cylinder, which has a simple structure and is easy to operate.

[0091] A pair of first pressing wheels 222 are arranged on both sides of the thickness direction of the pole piece 400, and the first driving member 221 can drive the pair of first pressing wheels 222 to move closer to or away from each other, so as to realize the pasting operation of the first sub-tape 310 and the second sub-tape 320 to the pole piece 400. The structure is simple and the operation is convenient. When the pair of first pressing wheels 222 are close to each other, it is convenient to press the first sub-tape 310 and the second sub-tape 320 to the two sides of the thickness direction of the pole piece 400, so as to ensure that the first sub-tape 310 and the second sub-tape 320 have a good bonding effect with the pole piece 400. When the pair of first pressing wheels 222 are away from each other, it is convenient for the first sub-tape 310, the pole piece 400 and the second sub-tape 320 to pass through between the pair of first pressing wheels 222, so as to facilitate maintenance operations.

[0092] It should be pointed out that if Figure 5As shown, the number of the first driving members 221 can be two, and the two first driving members 221 correspond one-to-one to a pair of first pressure wheels 222 respectively. The first driving members 221 drive the corresponding first pressure wheels 222 to approach or move away from the pole piece 400, so as to realize the mutual approach or distance of the pair of first pressure wheels 222. The operation is convenient, and it is easy to realize the driving of the first pressure wheels 222.

[0093] See also Figure 8 and Fig. 9 , Figure 8 is a schematic structural diagram of a first pressing wheel 222 provided according to some embodiments of the present application, Fig. 9 for Figure 8 According to some embodiments of the present application, Figure 8 and Fig. 9 As shown, each first pressing wheel 222 includes a first pressing wheel body 2221 and a first buffer layer 2222 arranged on the outer peripheral surface of the first pressing wheel body 2221; the first buffer layer 2222 includes a first buffer segment 22221, a second buffer segment 22222 and a third buffer segment 22223 which are sequentially distributed along the axial direction of the first pressing wheel body 2221. The thickness of the third buffer segment 22223 is greater than that of the first buffer segment 22221. The second buffer segment 22222 connects the first buffer segment 22221 and the third buffer segment 22223. The thickness of the second buffer segment 22222 gradually increases along the direction from the first buffer segment 22221 to the third buffer segment 22223. The third buffer segment 22223 is used to press the portion of the first sub-tape 310 beyond the first edge 420 with the portion of the second sub-tape 320 beyond the first edge 420.

[0094] The first pressing wheel body 2221 may be a cylindrical structure, which is connected to the execution end of the first driving member 221 .

[0095] The first buffer layer 2222 is arranged on the outer peripheral surface of the first pressure wheel body 2221, and is arranged around the central axis of the first pressure wheel body 2221. The first buffer layer 2222 can buffer the force applied by the first pressure wheel body 2221 to the first sub-tape 310, the pole piece 400 and the second sub-tape 320. The material of the first buffer layer 2222 can be rubber, PVC (Polyvinyl chloride, polyvinyl chloride), etc. When the first buffer layer 2222 abuts against the first sub-tape 310, the second sub-tape 320 and the pole piece 400, it can be deformed to buffer the force applied to the first sub-tape 310, the second sub-tape 320 and the pole piece 400.

[0096] The first buffer section 22221, the second buffer section 22222 and the third buffer section 22223 are sequentially distributed along the axial direction of the first pressing wheel body 2221, the thickness of the third buffer section 22223 is greater than the thickness of the first buffer section 22221, and the distance from the outer surface of the third buffer section 22223 to the central axis of the first pressing wheel body 2221 is greater than the distance from the outer surface of the first buffer section 22221 to the central axis of the first pressing wheel body 2221. The second buffer section 22222 connects the first buffer section 22221 and the third buffer section 22223, and the second buffer section 22222, the first buffer section 22221 and the third buffer section 22223 may be integrally formed, or the first buffer section 22221 and the third buffer section 22223 may be respectively connected to the second buffer section 22222 by bonding, hot-melt connection, clamping, sleeve connection, etc.

[0097] Along the direction from the first buffer segment 22221 to the third buffer segment 22223, the thickness of the second buffer segment 22222 gradually increases, and the second buffer segment 22222 is a variable diameter structure, that is, the maximum diameter end of the second buffer segment 22222 is close to the third buffer segment 22223, and the minimum diameter end of the second buffer segment 22222 is close to the first buffer segment 22221. The structural forms of the first buffer segment 22221, the second buffer segment 22222 and the third buffer segment 22223 match the edge structure of the pole piece 400, that is, the first buffer segment 22221 corresponds to the active material layer 440 area of ​​the pole piece 400, the third buffer segment 22223 corresponds to the collector 430 area of ​​the pole piece 400 that is not coated with the active material layer 440, and the second buffer segment 22222 corresponds to the edge area of ​​the active material layer 440 of the pole piece 400.

[0098] Since the first sub-tape 310 and the second sub-tape 320 are in a tensioned state when they are pasted on the pole piece 400, and the thickness of the pole piece 400 is in the micron level, when the two third buffer sections 22223 press the first sub-tape 310 and the second sub-tape 320 on both sides of the thickness direction of the pole piece 400, the part of the first sub-tape 310 that exceeds the first edge 420 and the part of the second sub-tape 320 that exceeds the first edge 420 are also pressed by the third buffer sections 22223.

[0099] Through the deformation of the first buffer layer 2222, the force exerted by the two first pressure wheels 222 on the first sub-tape 310, the second sub-tape 320 and the electrode piece 400 when they are close to each other can be buffered, so that the first sub-tape 310 and the second sub-tape 320 are firmly attached to the electrode piece 400; at the same time, the structural forms of the first buffer segment 22221, the second buffer segment 22222 and the third buffer segment 22223 match the structure of the active material layer 440 coated on the electrode piece 400, and the third buffer segment 22223 can press the part of the first sub-tape 310 that exceeds the first edge 420 with the part of the second sub-tape 320 that exceeds the first edge 420, so as to ensure that the first sub-tape 310 and the second sub-tape 320 are firmly bonded to achieve wrapping of the first edge 420.

[0100] See also Fig.10 , Fig.10 Schematic diagram of the structure of the adhesive laminating device 200 provided according to some other embodiments of the present application. According to some embodiments of the present application, optionally, Fig.10 As shown, the adhesive laminating device 200 further includes a first tension roller 231 and a second tension roller 232. Along the running direction of the first sub-tape 310, the first tension roller 231 is disposed between the first providing mechanism 211 and the first pressing mechanism 220, and the first tension roller 231 is used to tension the first sub-tape 310. Along the running direction of the second sub-tape 320, the second tension roller 232 is disposed between the second providing mechanism 212 and the first pressing mechanism 220, and the second tension roller 232 is used to tension the second sub-tape 320.

[0101] The running direction of the first sub-tape 310 is the conveying direction of the first sub-tape 310. The first tension roller 231 is disposed between the first providing mechanism 211 and the first pressing mechanism 220. When the first sub-tape 310 moves from the first providing mechanism 211 to the first pressing mechanism 220, the first sub-tape 310 is tensioned by the first tension roller 231. At the first pressing mechanism 220, the first sub-tape 310 is pressed and adhered to one side of the electrode sheet 400 in the thickness direction by the first pressing mechanism 220.

[0102] The running direction of the second sub-tape 320 is the conveying direction of the second sub-tape 320. The second tension roller 232 is disposed between the second providing mechanism 212 and the first pressing mechanism 220. During the process of the second sub-tape 320 moving from the second providing mechanism 212 to the first pressing mechanism 220, the second sub-tape 320 is tensioned by the second tension roller 232. At the first pressing mechanism 220, the second sub-tape 320 is pressed and adhered to the other side of the electrode sheet 400 in the thickness direction by the first pressing mechanism 220.

[0103] It should be noted that there can be multiple first tension rollers 231, and according to different installation spaces, multiple first tension rollers 231 are arranged at different positions to ensure that the first sub-tape 310 is in a tensioned state during the conveying process. Similarly, there can be multiple second tension rollers 232, and according to different installation spaces, multiple second tension rollers 232 are arranged at different positions to ensure that the second sub-tape 320 is in a tensioned state during the conveying process.

[0104] The first tension roller 231 provides tensioning force for the first sub-tape 310, and the second tension roller 232 provides tensioning force for the second sub-tape 320, so that the first sub-tape 310 and the second sub-tape 320 are stretched to ensure that the first sub-tape 310 and the second sub-tape 320 are adhered to the pole piece 400 in a stretched state, avoiding wrinkles in the first sub-tape 310 and the second sub-tape 320, and ensuring the pasting effect.

[0105] According to some embodiments of the present application, optionally, Fig.10 As shown, the adhesive laminating device 200 further includes a heating mechanism 240 and a second pressing mechanism 250. Along the tape running direction of the electrode piece 400, the heating mechanism 240 is disposed downstream of the first pressing mechanism 220, and the heating mechanism 240 is used to heat the electrode piece 400, the first sub-tape 310 and the second sub-tape 320. Along the tape running direction of the electrode piece 400, the second pressing mechanism 250 is disposed downstream of the heating mechanism 240, and the second pressing mechanism 250 is used to press the first sub-tape 310, the second sub-tape 320 and the electrode piece 400.

[0106] Along the running direction of the electrode piece 400, the first pressing mechanism 220, the heating mechanism 240 and the second pressing mechanism 250 are sequentially distributed. The electrode piece 400 first passes through the first pressing mechanism 220, and the first sub-tape 310 and the second sub-tape 320 are pressed on both sides of the thickness direction of the electrode piece 400 by the first pressing mechanism 220. Then, the electrode piece 400 with the first sub-tape 310 and the second sub-tape 320 is moved to the heating mechanism 240. The heating mechanism 240 heats the electrode piece 400, the first sub-tape 310 and the second sub-tape 320. The heated electrode piece 400, the first sub-tape 310 and the second sub-tape 320 are pressed by the second pressing mechanism 250.

[0107] The heating mechanism 240 is a component for heating the pole piece 400, the first sub-tape 310 and the second sub-tape 320 to soften the first sub-tape 310 and the second sub-tape 320. The number of the heating mechanism 240 can be one or two. The heating mechanism 240 can adopt electromagnetic induction heating, infrared heating, etc.

[0108] Alternatively, if Fig.10As shown, there are two heating mechanisms 240 , which are respectively located on both sides of the thickness direction of the pole piece 400 to heat the first sub-tape 310 , the pole piece 400 and the second sub-tape 320 from both sides of the thickness direction of the pole piece 400 .

[0109] The electrode 400, the first sub-tape 310 and the second sub-tape 320 are heated by the heating mechanism 240, so that the first sub-tape 310 and the second sub-tape 320 are softened, thereby improving the viscosity of the first sub-tape 310 and the second sub-tape 320; at the same time, since the first sub-tape 310 and the second sub-tape 320 are heated and softened, the heated first sub-tape 310, the second sub-tape 320 and the electrode 400 are pressed together by the second pressing mechanism 250, and the bubbles between the first sub-tape 310 and the second sub-tape 320 and the electrode 400 are more easily discharged, and the first sub-tape 310 and the second sub-tape 320 can be more closely attached to the electrode 400, thereby improving the bonding quality of the first sub-tape 310 and the second sub-tape 320 and the electrode 400.

[0110] According to some embodiments of the present application, optionally, Fig.10 As shown, the second pressing mechanism 250 includes a second driving member 251 and a pair of second pressing wheels 252. The pair of second pressing wheels 252 are respectively arranged on both sides of the thickness direction of the pole piece 400, and the second driving member 251 is used to drive the pair of second pressing wheels 252 to move closer to or away from each other.

[0111] A pair of second pressing wheels 252 refers to two pressing wheel structures that are arranged opposite to each other and are used to press the first sub-tape 310, the second sub-tape 320 and the pole piece 400. The two second pressing wheels 252 are respectively located on both sides of the thickness direction of the pole piece 400, and a space for accommodating the first sub-tape 310, the second sub-tape 320 and the pole piece 400 is formed between the two second pressing wheels 252. By adjusting the gap between the two second pressing wheels 252, the force applied by the second pressing wheels 252 on the first sub-tape 310, the second sub-tape 320 and the pole piece 400 can be adjusted.

[0112] The second driving member 251 is a power component, which is used to drive a pair of second pressing wheels 252 to move closer to or away from each other. The second driving member 251 can be a cylinder, a hydraulic cylinder, an electric push rod, etc., or can be a combination of a motor and a transmission component, and the transmission component can be a bidirectional lead screw, a gear rack, etc. Optionally, the second driving member 251 can be a cylinder, which has a simple structure and is easy to operate.

[0113] A pair of second pressing wheels 252 are respectively arranged on both sides of the thickness direction of the pole piece 400, and the second driving member 251 drives the pair of second pressing wheels 252 to move closer to or away from each other, so as to realize the pasting operation of the first sub-tape 310 and the second sub-tape 320 to the pole piece 400. The structure is simple and the operation is convenient. When the pair of second pressing wheels 252 are close to each other, the first sub-tape 310 and the second sub-tape 320 can be pressed onto the pole piece 400. When the pair of second pressing wheels 252 are away from each other, the first sub-tape 310, the pole piece 400 and the second sub-tape 320 can pass through between the pair of second pressing wheels 252, which is convenient for maintenance operations.

[0114] According to some embodiments of the present application, optionally, Fig.10 As shown, the adhesive laminating device 200 further includes a first detection mechanism 261 and a second detection mechanism 262. Along the running direction of the first sub-tape 310, the first detection mechanism 261 is disposed between the first pressing mechanism 220 and the heating mechanism 240, and the first detection mechanism 261 is used to obtain first information of whether the first sub-tape 310 is adhered to the pole piece 400. Along the running direction of the second sub-tape 320, the second detection mechanism 262 is disposed between the first pressing mechanism 220 and the heating mechanism 240, and the second detection mechanism 262 is used to obtain second information of whether the second sub-tape 320 is adhered to the pole piece 400.

[0115] The first detection mechanism 261 is a detection component for obtaining whether the first sub-tape 310 is adhered to the pole piece 400, and can be a visual sensor, such as a CCD (Charge-coupled Device) camera. The first detection mechanism 261 can obtain the first information of whether the first sub-tape 310 is adhered to the pole piece 400 based on the collected image grayscale information.

[0116] The second detection mechanism 262 is a detection component for obtaining whether the second sub-tape 320 is adhered to the pole piece 400, and can be a visual sensor, such as a CCD (Charge-coupled Device) camera. The second detection mechanism 262 can obtain the second information of whether the second sub-tape 320 is adhered to the pole piece 400 based on the collected image grayscale information.

[0117] In order to improve the accuracy of image information collected by the first detection mechanism 261 and the second detection mechanism, the color of the first sub-tape 310 and the second sub-tape 320 is generally different from the extension of the collector 430 of the electrode 400. For example, the color of the first sub-tape 310 and the second sub-tape 320 can be but not limited to yellow, brown, green, blue, white, etc.

[0118] The first information of whether the first sub-tape 310 is adhered to the pole piece 400 is obtained through the first detection mechanism 261, so that the information of the first sub-tape 310 on the pole piece 400 can be grasped, so that an abnormal signal can be issued when the first sub-tape 310 on the pole piece 400 is broken, so that the first sub-tape 310 can be stopped in time to replenish the first sub-tape 310, thereby ensuring the continuity of the first sub-tape 310 on the pole piece 400; the second information of whether the second sub-tape 320 is adhered to the pole piece 400 is obtained through the second detection mechanism 262, so that the information of the second sub-tape 320 on the pole piece 400 can be grasped, so that the abnormal signal can be issued when the second sub-tape 320 on the pole piece 400 is broken, so that the second sub-tape 320 can be stopped in time to replenish the second sub-tape 320, thereby ensuring the continuity of the second sub-tape 320 on the pole piece 400.

[0119] See also Fig.11 , Fig.11 Schematic diagram of the structure of the pole piece forming device according to some other embodiments of the present application. According to some embodiments of the present application, optionally, Fig.11 As shown, the electrode forming device further includes an electrode conveying mechanism 500 and a controller 600. The electrode conveying mechanism 500 is used to convey the electrode 400; the controller 600 is used to control the electrode conveying mechanism 500 to start or stop according to the first information obtained by the first detection mechanism 261, and / or, to control the electrode conveying mechanism 500 to start or stop according to the second information obtained by the second detection mechanism 262.

[0120] The electrode sheet conveying mechanism 500 is a mechanism for conveying the electrode sheet 400, so that the electrode sheet 400 can be processed continuously and the forming efficiency of the electrode sheet 400 can be improved. The electrode sheet conveying mechanism 500 may include an electrode sheet unwinding roller 510 and an electrode sheet winding roller 520, one end of the electrode sheet 400 is arranged on the electrode sheet unwinding roller 510, and the electrode sheet 400 is arranged on the electrode sheet winding roller 520 after passing through the die cutting device 100 and the glue sticking device 200.

[0121] The controller 600 is a control element, which is electrically connected to the first detection mechanism 261, the second detection mechanism 262 and the electrode conveying mechanism 500. The controller 600 can analyze the first information obtained by the first detection mechanism 261 and the second information obtained by the second detection mechanism 262, and control the electrode conveying mechanism 500 to perform corresponding actions.

[0122] The controller 600 can control the start or stop of the electrode conveying mechanism 500 according to the first information obtained by the first detection mechanism 261, or the controller 600 can also control the start or stop of the electrode conveying mechanism 500 according to the second information obtained by the second detection mechanism 262, or the controller 600 can also control the start or stop of the electrode conveying mechanism 500 according to the first information obtained by the first detection mechanism 261, and control the start or stop of the electrode conveying mechanism 500 according to the second information obtained by the second detection mechanism 262.

[0123] The electrode 400 is conveyed by the electrode conveying mechanism 500 to improve production efficiency; the first sub-tape 310 and the second sub-tape 320 are monitored in real time through the cooperation of the controller 600 with the first detection mechanism 261, the second detection mechanism 262 and the electrode conveying mechanism 500. When the first sub-tape 310 and / or the second sub-tape 320 on the electrode 400 is broken, the electrode conveying mechanism 500 is stopped in time to convey the electrode 400 to replenish the first sub-tape 310 and / or the second sub-tape 320 to ensure the continuity of the first sub-tape 310 and the second sub-tape 320 on the electrode 400.

[0124] According to some embodiments of the present application, optionally, Fig.10 As shown, the adhesive laminating device 200 further includes a first clamping mechanism 271 and / or a second clamping mechanism 272. Along the running direction of the first sub-tape 310, the first clamping mechanism 271 is disposed between the first detection mechanism 261 and the heating mechanism 240, and the first clamping mechanism 271 is used to clamp the head end of the next section of the first sub-tape 310 and pull the first sub-tape 310 to move along the running direction of the pole piece 400, so that the head end of the next section of the first sub-tape 310 covers the end of the previous section of the first sub-tape 310. Along the running direction of the second sub-tape 320, the second clamping mechanism 272 is disposed between the second detection mechanism 262 and the heating mechanism 240, and the second clamping mechanism 272 is used to clamp the head end of the next section of the second sub-tape 320 and pull the second sub-tape 320 to move along the running direction of the pole piece 400, so that the head end of the next section of the second sub-tape 320 covers the end of the previous section of the second sub-tape 320.

[0125] That the gluing device 200 includes the first clamping mechanism 271 and / or the second clamping mechanism 272 means that the gluing device 200 may include the first clamping mechanism 271 , or the gluing device 200 may include the second clamping mechanism 272 , or the gluing device 200 may include the first clamping mechanism 271 and the second clamping mechanism 272 .

[0126] Alternatively, if Fig.10 As shown, the glue laminating device 200 may include a first clamping mechanism 271 and a second clamping mechanism 272, which respectively clamp and pull the first sub-tape 310 and the second sub-tape 320 to move, so that the next section of the first sub-tape 310 covers the end of the previous section of the first sub-tape 310, and the next section of the second sub-tape 320 covers the end of the previous section of the second sub-tape 320, so as to ensure the continuity of the first sub-tape 310 and the second sub-tape 320 on the pole piece 400.

[0127] The previous section of the first sub-tape 310 refers to the first sub-tape 310 pasted on the pole piece 400, and the end of the section of the first sub-tape 310 has been image information collected by the first detection mechanism 261. In other words, the end of the previous section of the first sub-tape 310 corresponds to the position of the first detection mechanism 261. The next section of the first sub-tape 310 refers to the first sub-tape 310 that is newly provided and will be pasted on the pole piece 400 after the first sub-tape 310 is broken on the pole piece 400. This section of the first sub-tape 310 is used to connect with the previous section of the first sub-tape 310 to make the first sub-tape 310 on the pole piece 400 continuous.

[0128] The previous section of the second sub-tape 320 refers to the second sub-tape 320 pasted on the pole piece 400, and the end of the section of the second sub-tape 320 has been imaged by the second detection mechanism 262. In other words, the end of the previous section of the second sub-tape 320 corresponds to the position of the second detection mechanism 262. The next section of the second sub-tape 320 refers to the second sub-tape 320 that is newly provided and will be pasted on the pole piece 400 after the second sub-tape 320 is broken on the pole piece 400. The second sub-tape 320 is used to connect with the previous section of the second sub-tape 320 to make the second sub-tape 320 on the pole piece 400 continuous.

[0129] When it is known that the first sub-tape 310 on the pole piece 400 is broken according to the first information obtained by the first detection mechanism 261, the conveying of the pole piece 400 is stopped. At this time, the position of the end of the previous section of the first sub-tape 310 corresponds to the position of the first detection mechanism 261, and the first clamping mechanism 271 extends out and clamps the beginning end of the next section of the first sub-tape 310 provided by the first providing mechanism 211, and pulls the first sub-tape 310 along the tape running direction of the pole piece 400, moves until the beginning end of the next section of the first sub-tape 310 covers the end of the previous section of the first sub-tape 310 on the pole piece 400, and sticks the beginning end of the next section of the first sub-tape 310 to the end of the previous section of the first sub-tape 310, and makes the next section of the first sub-tape 310 stick to the pole piece 400, to ensure that the first sub-tape 310 is continuous on the pole piece 400.

[0130] When it is known that the second sub-tape 320 on the pole piece 400 is broken according to the second information obtained by the second detection mechanism 262, the conveying of the pole piece 400 is stopped. At this time, the position of the end of the previous section of the second sub-tape 320 corresponds to the position of the second detection mechanism 262, and the second clamping mechanism 272 extends out and clamps the beginning end of the next section of the second sub-tape 320 provided by the second providing mechanism 212, and pulls the second sub-tape 320 along the running direction of the pole piece 400 until the beginning end of the next section of the second sub-tape 320 covers the end of the previous section of the second sub-tape 320 on the pole piece 400, and the beginning end of the next section of the second sub-tape 320 is pasted to the end of the previous section of the second sub-tape 320, and the next section of the second sub-tape 320 is pasted to the pole piece 400, to ensure that the second sub-tape 320 is continuous on the pole piece 400.

[0131] By clamping the leading end of the next section of the first sub-tape 310 and pulling the first sub-tape 310 to move through the first clamping mechanism 271, the leading end of the next section of the first sub-tape 310 can cover the trailing end of the previous section of the first sub-tape 310, thereby ensuring that the first sub-tape 310 is continuous on the pole piece 400; by clamping the leading end of the next section of the second sub-tape 320 and pulling the second sub-tape 320 to move through the second clamping mechanism 272, the leading end of the next section of the second sub-tape 320 can cover the trailing end of the previous section of the second sub-tape 320, thereby ensuring that the second sub-tape 320 is continuous on the pole piece 400.

[0132] According to some embodiments of the present application, optionally, the first clamping mechanism 271 includes a third driving member, a fourth driving member, and a pair of first clamping jaws, the third driving member is used to drive the pair of first clamping jaws to move closer to or farther from each other to clamp or release the first sub-tape 310; the fourth driving member is used to drive the pair of first clamping jaws to move along the tape running direction of the pole piece 400. For example, when the fourth driving member drives the pair of first clamping jaws to extend, the pair of first clamping jaws can clamp the head end of the next section of the first sub-tape 310, and when the fourth driving member drives the pair of first clamping jaws to retract, the pair of first clamping jaws pull the first sub-tape 310 to move. Similarly, the second clamping mechanism 272 includes a fifth driving member, a sixth driving member, and a pair of second clamping jaws, the fifth driving member is used to drive the pair of second clamping jaws to move closer to or farther from each other to clamp or release the second sub-tape 320; the sixth driving member is used to drive the pair of second clamping jaws to move along the tape running direction of the pole piece 400. For example, when the sixth driving member drives the pair of second clamps to extend, the pair of second clamps can clamp the head end of the next section of the second sub-tape 320, and when the sixth driving member drives the pair of second clamps to retract, the pair of second clamps pulls the second sub-tape 320 to move. The third driving member, the fourth driving member, the fifth driving member and the sixth driving member can all be cylinders, and in other embodiments, they can also be other driving structures such as hydraulic cylinders and electric push rods.

[0133] According to some embodiments of the present application, optionally, Fig.10As shown, the glue sticking device 200 further includes a first glue-laying driving roller 281 and / or a second glue-laying driving roller 282. Along the running direction of the first sub-tape 310, the first glue-laying driving roller 281 is arranged between the first providing mechanism 211 and the first pressing mechanism 220, and the first glue-laying driving roller 281 is used to drive the first sub-tape 310 to move. Along the running direction of the second sub-tape 320, the second glue-laying driving roller 282 is arranged between the second providing mechanism 212 and the first pressing mechanism 220, and the second glue-laying driving roller 282 is used to drive the second sub-tape 320 to move.

[0134] The glue laminating device 200 also includes a first glue laminating driving roller 281 and / or a second glue laminating driving roller 282, which means that the glue laminating device 200 may include the first glue laminating driving roller 281, or the glue laminating device 200 may include the second glue laminating driving roller 282, or the glue laminating device 200 may include the first glue laminating driving roller 281 and the second glue laminating driving roller 282.

[0135] Alternatively, if Fig.10 As shown, the glue application device 200 may include a first glue application drive roller 281 and a second glue application drive roller 282. The first glue application drive roller 281 and the second glue application drive roller 282 may be arranged on both sides of the thickness direction of the pole piece 400. The first glue application drive roller 281 and the second glue application drive roller 282 are respectively used to drive the first sub-tape 310 and the second sub-tape 320 to move.

[0136] In some embodiments, in order to ensure that the first sub-tape 310 and the second sub-tape 320 are stretched during transportation, the gluing device 200 is usually also equipped with a tension device. For example, the gluing device 200 also includes a first tension roller 231 and a second tension roller 232. The first tension roller 231 is used in conjunction with the first glue-releasing driving roller 281. The first tension roller 231 tensions the first sub-tape 310 to ensure that the first sub-tape 310 is in a stretched state when moving, thereby preventing the first sub-tape 310 from wrinkling; the second tension roller 232 is used in conjunction with the second glue-releasing driving mechanism. The second tension roller 232 tensions the second sub-tape 320 to ensure that the second sub-tape 320 is in a stretched state when moving, thereby preventing the second sub-tape 320 from wrinkling.

[0137] The first glue-releasing driving roller 281 is used to drive the first sub-tape 310 to move, and power is provided for the movement of the first sub-tape 310, so that the moving speed of the first sub-tape 310 matches the tape running speed of the pole piece 400, thereby ensuring that the first sub-tape 310 bonded to the pole piece 400 is in a stretched state; the second glue-releasing driving roller 282 is used to drive the second sub-tape 320 to move, and power is provided for the movement of the second sub-tape 320, so that the moving speed of the second sub-tape 320 matches the tape running speed of the pole piece 400, thereby ensuring that the second sub-tape 320 bonded to the pole piece 400 is in a stretched state.

[0138] In some embodiments, in order to prevent the first sub-tape 310 from slipping at the first adhesive release driving roller 281, as shown in FIG. Fig.10 As shown, the glue laminating device 200 may further include a first pressing roller 283, and the first pressing roller 283 is used to abut the first sub-tape 310 against the first glue-laying driving roller 281. Since the non-sticky side of the first sub-tape 310 contacts the first glue-laying driving roller 281, and the sticky side of the first sub-tape 310 faces away from the first glue-laying driving roller 281, the roller surface of the first pressing roller 283 is provided with an anti-sticking layer, such as polytetrafluoroethylene, anti-sticking tape 300, etc., and the provision of the anti-sticking layer can prevent the first sub-tape 310 from adhering to the first pressing roller 283.

[0139] In some embodiments, in order to prevent the second sub-tape 320 from slipping at the second glue-dispensing driving roller 282, the glue-dispensing device 200 may further include a second pressing roller 284, which is used to abut the second sub-tape 320 against the second glue-dispensing driving roller 282. Since the non-sticky side of the second sub-tape 320 contacts the second glue-dispensing driving roller 282, and the sticky side of the second sub-tape 320 faces away from the second glue-dispensing driving roller 282, the roller surface of the second pressing roller 284 is provided with an anti-adhesive layer, such as polytetrafluoroethylene, anti-adhesive tape 300, etc. The provision of the anti-adhesive layer can prevent the second sub-tape 320 from adhering to the second pressing roller 284.

[0140] According to some embodiments of the present application, optionally, Fig.10 As shown, the adhesive laminating device 200 further includes a third detection mechanism 263 and a first deflection correction mechanism 291. Along the running direction of the first sub-tape 310, the third detection mechanism 263 is disposed between the first providing mechanism 211 and the first pressing mechanism 220, and the third detection mechanism 263 is used to obtain edge information of the pole piece 400. Along the running direction of the first sub-tape 310, the first deflection correction mechanism 291 is disposed between the first providing mechanism 211 and the first pressing mechanism 220, and the first deflection correction mechanism 291 is used to adjust the position of the first sub-tape 310 according to the edge information obtained by the third detection mechanism 263.

[0141] Along the running direction of the first sub-tape 310 , the third detection mechanism 263 is disposed between the first providing mechanism 211 and the first pressing mechanism 220 . The first sub-tape 310 is pressed onto the pole piece 400 by the first pressing mechanism 220 after being detected by the third detection mechanism 263 .

[0142] The edge information of the electrode piece 400 may be information at the first edge 420 of the electrode piece 400 , or may be information at the edge of the active material layer 440 of the electrode piece 400 .

[0143] Along the running direction of the first sub-tape 310, the first correcting mechanism 291 is arranged between the first providing mechanism 211 and the first pressing mechanism 220. The first correcting mechanism 291 adjusts the position of the first sub-tape 310 according to the edge information obtained by the third detection mechanism 263, so that when the first sub-tape 310 is pressed onto the pole piece 400 by the first pressing mechanism 220, the bonding position between the first sub-tape 310 and the pole piece 400 is accurate.

[0144] The edge information of the pole piece 400 is detected by the third detection mechanism 263, and the tape deviation of the pole piece 400 is understood, so that the first correction mechanism 291 can adjust the position of the first sub-tape 310 according to the edge information of the pole piece 400, and calibrate the position of the first sub-tape 310 before it is pasted on the pole piece 400, to ensure that the bonding position of the first sub-tape 310 and the pole piece 400 is accurate.

[0145] It should be noted that the third detection mechanism 263 may be a visual sensor, such as a CCD camera, a laser sensor, etc.; the first correction mechanism 291 may be a correction controller 600 .

[0146] According to some embodiments of the present application, optionally, Fig.10 As shown, the adhesive laminating device 200 further includes a fourth detection mechanism 264 and a second deflection correction mechanism 292. Along the running direction of the second sub-tape 320, the fourth detection mechanism 264 is disposed between the second providing mechanism 212 and the first pressing mechanism 220, and the fourth detection mechanism 264 is used to obtain edge information of the pole piece 400. Along the running direction of the second sub-tape 320, the second deflection correction mechanism 292 is disposed between the second providing mechanism 212 and the first pressing mechanism 220, and the second deflection correction mechanism 292 is used to adjust the position of the second sub-tape 320 according to the edge information obtained by the fourth detection mechanism 264.

[0147] Along the running direction of the second sub-tape 320 , the fourth detection mechanism 264 is disposed between the second providing mechanism 212 and the first pressing mechanism 220 . The second sub-tape 320 is pressed onto the pole piece 400 by the first pressing mechanism 220 after being detected by the fourth detection mechanism 264 .

[0148] The fourth detection mechanism 264 is used to detect edge information of the pole piece 400 located on a side away from the first sub-tape 310 in the thickness direction of the pole piece 400 .

[0149] Along the running direction of the second sub-tape 320, the second correcting mechanism 292 is arranged between the second providing mechanism 212 and the first pressing mechanism 220. The second correcting mechanism 292 adjusts the position of the second sub-tape 320 according to the edge information obtained by the fourth detection mechanism 264, so that when the second sub-tape 320 is pressed onto the pole piece 400 by the first pressing mechanism 220, the bonding position between the second sub-tape 320 and the pole piece 400 is accurate.

[0150] The fourth detection mechanism 264 detects the edge information of the pole piece 400 and grasps the tape deviation of the pole piece 400, so that the second correction mechanism 292 can adjust the position of the second sub-tape 320 according to the edge information of the pole piece 400, and calibrate the position of the first sub-tape 310 before the first sub-tape 310 is pasted on the pole piece 400, to ensure the accurate bonding position of the second sub-tape 320 and the pole piece 400.

[0151] It should be noted that the fourth detection mechanism 264 may be a visual sensor, such as a CCD camera, a laser sensor, etc.; the second correction mechanism 292 may be a correction controller 600 .

[0152] In some embodiments, the adhesive laminating device 200 may further include a third detection mechanism 263, a first deviation correction mechanism 291, and a second deviation correction mechanism 292. Through the edge information obtained by the third detection mechanism 263, the first deviation correction mechanism 291 adjusts the position of the first sub-tape 310, and the second deviation correction mechanism 292 adjusts the position of the second sub-tape 320. In this case, there is no need to set up a fourth detection mechanism 264. Only the edge information of the pole piece 400 obtained by the third detection mechanism 263 can be used to adjust the position of the first sub-tape 310 and the position of the second sub-tape 320. This solution can reduce the number of detection mechanisms and save costs.

[0153] According to some embodiments of the present application, see Fig.10The present application provides a pole piece forming device, which includes a die-cutting device 100 and a gluing device 200. The die-cutting device 100 is used to cut a pole ear 410 on the pole piece 400, and the pole ear 410 protrudes from the first edge 420 of the pole piece 400. Along the tape running direction of the pole piece 400, the gluing device 200 is arranged downstream of the die-cutting device 100. The gluing device 200 includes a device for sticking a tape 300 on the pole piece 400. The tape 300 includes a first sub-tape 310 and a second sub-tape 320. The gluing device 200 sticks the first sub-tape 310 and the second sub-tape 320 on opposite sides of the thickness direction of the pole piece 400, respectively, and makes the portion of the first sub-tape 310 exceeding the first edge 420 bonded to the portion of the second sub-tape 320 exceeding the first edge 420. By bonding the first sub-tape 310 and the second sub-tape 320 to the pole piece 400, and bonding the portion of the first sub-tape 310 extending beyond the first edge 420 to the portion of the second sub-tape 320 extending beyond the first edge 420, the first edge 420 is wrapped and the burrs on the first edge 420 are blocked. After the pole piece 400 and the diaphragm form an electrode assembly, it is more difficult for the burrs to pierce the diaphragm, thereby reducing the probability of contact between adjacent positive and negative pole pieces. After the battery is prepared using such a pole piece 400, the battery has higher safety.

[0154] See also Fig.12 , Fig.12 A schematic flow chart of a pole piece forming method provided in some embodiments of the present application. According to some embodiments of the present application, the present application also provides a pole piece forming method, such as Fig.12 As shown, the pole piece forming method includes:

[0155] S701, cutting a pole ear 410 on the pole piece 400, so that the pole ear 410 protrudes from the first edge 420 of the pole piece 400;

[0156] S702 , sticking the tape 300 on the cut electrode piece 400 , and wrapping the first edge 420 with the tape 300 .

[0157] It should be pointed out that the pole piece forming method uses the pole piece forming equipment of the above-mentioned scheme.

[0158] According to the pole piece forming method of the embodiment of the present application, the pole piece 400 is formed by sticking the tape 300 on the pole piece 400 and wrapping the tape 300 around the first edge 420. This can effectively isolate the burrs generated after the pole piece 400 cuts the pole ear 410, avoid the burrs piercing the diaphragm during the battery manufacturing process, and improve the safety of the battery.

[0159] According to some embodiments of the present application, optionally, the step of sticking the tape 300 on the cut pole piece 400 and wrapping the tape 300 around the first edge 420 includes: sticking the first sub-tape 310 and the second sub-tape 320 on opposite sides of the thickness direction of the pole piece 400 respectively, and bonding the portion of the first sub-tape 310 that exceeds the first edge 420 to the portion of the second sub-tape 320 that exceeds the first edge 420 to wrap the first edge 420.

[0160] The first sub-tape 310 and the second sub-tape 320 are respectively bonded to the opposite sides of the electrode piece 400 in the thickness direction, which is easy to operate and can ensure the wrapping effect of the first edge 420 .

[0161] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pole piece forming device, characterized in that: include: A die-cutting device, used for cutting a pole ear on the pole piece and forming a first edge at the cutting edge, wherein the pole ear protrudes from the first edge of the pole piece; A gluing device, arranged downstream of the die-cutting device along the tape running direction of the pole piece, and used for sticking a tape on the pole piece and making the tape wrap the first edge; The adhesive tape comprises a first sub-adhesive tape and a second sub-adhesive tape; The glue sticking device comprises: A first providing mechanism, used for providing the first sub-tape to one side of the electrode piece in a thickness direction; A second providing mechanism, used for providing the second sub-tape to the other side of the pole piece in the thickness direction; a first pressing mechanism, used for pressing the first sub-tape, the second sub-tape and the pole piece, so that the first sub-tape and the second sub-tape are respectively attached to both sides of the pole piece in the thickness direction, and the portion of the first sub-tape exceeding the first edge is bonded to the portion of the second sub-tape exceeding the first edge, so as to wrap the first edge; The first pressing mechanism comprises: A pair of first pressing wheels, respectively arranged on both sides of the pole piece in the thickness direction; A first driving member, used for driving the pair of first pressing wheels to move toward or away from each other; Each of the first pressing wheels includes a first pressing wheel body and a first buffer layer arranged on the outer peripheral surface of the first pressing wheel body, the first buffer layer includes a first buffer segment, a second buffer segment and a third buffer segment distributed in sequence along the axial direction of the first pressing wheel body, the thickness of the third buffer segment is greater than the thickness of the first buffer segment, the second buffer segment connects the first buffer segment and the third buffer segment, and the thickness of the second buffer segment gradually increases along the direction from the first buffer segment to the third buffer segment, and the third buffer segment is used to press the portion of the first sub-tape that exceeds the first edge with the portion of the second sub-tape that exceeds the first edge.

2. The pole piece forming equipment according to claim 1, characterized in that: The glue sticking device also includes: A first tension roller, arranged along the running direction of the first sub-tape between the first providing mechanism and the first pressing mechanism, and used for tensioning the first sub-tape; A second tension roller is arranged along the running direction of the second sub-tape between the second providing mechanism and the first pressing mechanism, and is used for tensioning the second sub-tape.

3. The pole piece forming equipment according to claim 1, characterized in that: The glue sticking device also includes: A heating mechanism, arranged downstream of the first pressing mechanism along the tape running direction of the pole piece, and used for heating the pole piece, the first sub-tape and the second sub-tape; A second pressing mechanism is arranged downstream of the heating mechanism along the tape running direction of the pole piece, and is used for pressing the first sub-tape, the second sub-tape and the pole piece.

4. The pole piece forming equipment according to claim 3, characterized in that: The second pressing mechanism comprises: A pair of second pressing wheels, respectively arranged on both sides of the pole piece in the thickness direction; The second driving member is used to drive the pair of second pressing wheels to move closer to or away from each other.

5. The pole piece forming equipment according to claim 3, characterized in that: The glue sticking device also includes: A first detection mechanism, arranged along the running direction of the first sub-tape between the first pressing mechanism and the heating mechanism, and used for obtaining first information on whether the first sub-tape is adhered to the electrode piece; The second detection mechanism is arranged between the first pressing mechanism and the heating mechanism along the running direction of the second sub-tape, and is used to obtain second information whether the second sub-tape is adhered to the electrode piece.

6. The pole piece forming equipment according to claim 5, characterized in that: The pole piece forming equipment also includes: A pole piece conveying mechanism, used for conveying the pole piece; A controller is used to control the start or stop of the pole piece conveying mechanism according to the first information obtained by the first detection mechanism, and / or to control the start or stop of the pole piece conveying mechanism according to the second information obtained by the second detection mechanism.

7. The pole piece forming equipment according to claim 5, characterized in that: The glue sticking device also includes: A first clamping mechanism is arranged along the running direction of the first sub-tape between the first detection mechanism and the heating mechanism, and is used to clamp the leading end of the next section of the first sub-tape and pull the first sub-tape to move along the running direction of the pole piece, so that the leading end of the next section of the first sub-tape covers the end of the previous section of the first sub-tape; and / or A second clamping mechanism is arranged along the running direction of the second sub-tape between the second detecting mechanism and the heating mechanism. The second clamping mechanism is used to clamp the leading end of the next section of the second sub-tape and pull the second sub-tape to move along the running direction of the pole piece so that the leading end of the next section of the second sub-tape covers the end of the previous section of the second sub-tape.

8. The pole piece forming equipment according to claim 1, characterized in that: The glue sticking device also includes: a first glue-dispensing driving roller, arranged along the running direction of the first sub-tape between the first providing mechanism and the first pressing mechanism, and used for driving the first sub-tape to move; and / or The second glue-dispensing driving roller is arranged along the running direction of the second sub-tape between the second providing mechanism and the first pressing mechanism, and is used for driving the second sub-tape to move.

9. The pole piece forming equipment according to claim 1, characterized in that: The glue sticking device also includes: A third detection mechanism, arranged along the running direction of the first sub-tape between the first providing mechanism and the first pressing mechanism, and used for obtaining edge information of the pole piece; A first deflection correcting mechanism is arranged along the running direction of the first sub-tape between the first providing mechanism and the first pressing mechanism, and is used to adjust the position of the first sub-tape according to the edge information obtained by the third detection mechanism.

10. The pole piece forming equipment according to claim 1, characterized in that: The glue sticking device also includes: A fourth detection mechanism, arranged between the second providing mechanism and the first pressing mechanism along the running direction of the second sub-tape, and used for obtaining edge information of the pole piece; A second deflection correcting mechanism is arranged along the running direction of the second sub-tape between the second providing mechanism and the first pressing mechanism, and is used to adjust the position of the second sub-tape according to the edge information obtained by the fourth detection mechanism.

11. A pole piece forming method, using the pole piece forming device according to any one of claims 1 to 10, characterized in that: include: Cutting a pole ear on the pole piece so that the pole ear protrudes from the first edge of the pole piece; Pasting an adhesive tape on the cut electrode piece, and wrapping the first edge with the adhesive tape; The step of sticking the tape on the cut electrode piece and wrapping the first edge with the tape comprises: The first sub-tape and the second sub-tape are respectively pasted on opposite sides of the pole piece in the thickness direction, and the portion of the first sub-tape exceeding the first edge is bonded to the portion of the second sub-tape exceeding the first edge to wrap the first edge.

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