WO2024020711A1

WO2024020711A1 - Adhesive pasting mechanism and winding system

Info

Publication number: WO2024020711A1
Application number: PCT/CN2022/107582
Authority: WO
Inventors: 吴翔; 张威; 张小畏; 温裕乾; 唐鸣浩; 张盛武; 张彪; 张展; 王治文; 孙昌
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2024-02-01

Abstract

Provided in the present application are an adhesive pasting mechanism and a winding system. The adhesive pasting mechanism provided by the present application is used for a winding system. The winding system is used for winding an electrode sheet and a separator to form an electrode assembly, and comprises an adhesive tape unwinding mechanism which is used for unwinding an adhesive tape, the adhesive tape being provided with a plurality of double-sided adhesives distributed at intervals in an unwinding direction; an adhesive dispensing mechanism which is located at the downstream of the adhesive tape unwinding mechanism and can move in a reciprocating mode, so as to paste the double-sided adhesive to the electrode sheet or the separator; and an adhesive tape winding mechanism which is located at the downstream of the adhesive dispensing mechanism and is used for winding the adhesive tape. The adhesive pasting mechanism provided by the present application can bond an electrode sheet and a separator together by means of double-sided adhesives, and particularly can bond head and tail portions of an electrode sheet with a separator, thereby solving the problems of poor coating of electrode assemblies, wrinkling and warping of head portions and folding of feeding. In addition, an electrode sheet or a separator is bonded by means of a plurality of double-sided adhesives distributed at intervals, so that the adhesive cutting process and space can be omitted, thus improving the working efficiency and saving the space.

Description

Gluing mechanism and winding system

Technical field

The embodiments of the present application relate to the field of energy storage technology, and specifically relate to a glue application mechanism and a winding system.

Background technique

In the battery winding manufacturing process, there will be processes such as pole piece feeding, cutting and finishing. During the pole piece feeding, cutting and finishing process, problems such as folding or wrinkling often occur at the head and tail of the pole piece, which affects Battery quality.

Contents of the invention

In view of the above problems, embodiments of the present application provide a glue application mechanism and a winding system that can bond the separator at the head and tail parts of the pole piece to reduce the problems of wrinkles and warping at the head of the electrode assembly and discounting of the incoming materials.

This application provides a glue application mechanism for a winding system. The winding system is used to wind pole pieces and diaphragms to form an electrode assembly. It includes: a tape unwinding mechanism for unwinding tape. The tape is provided with an edge unwinding device. Multiple double-sided tapes are spaced apart in the roll direction; the glue punching mechanism is located downstream of the tape unwinding mechanism. The glue punching mechanism can reciprocate to fit the double-sided tape to the pole piece or diaphragm; the tape rewinding mechanism is located at the glue punching mechanism. Downstream of the mechanism, it is used to rewind the tape.

The gluing mechanism provided in this embodiment can bond the pole piece and the separator together through double-sided tape, especially the head and tail parts of the pole piece and the separator, thereby solving the problem of poor coating of the electrode assembly and wrinkles on the head. Problems with warping and incoming material discounts. In addition, by pasting the pole pieces or diaphragms with multiple spaced double-sided tapes, the glue cutting process and space can be omitted, improving work efficiency and saving space.

In some embodiments, the glue punching mechanism includes a first driving mechanism and a pushing mechanism, and the first driving mechanism drives the pushing mechanism toward or away from the adhesive tape. When the double-sided tape on the tape reaches the designated position, the first driving mechanism drives the pushing mechanism to attach the double-sided tape to the diaphragm or pole piece. Through the cooperation of the first driving mechanism and the pushing mechanism, the double-sided tape and the diaphragm can be improved. Or the bonding strength of the pole piece.

In some embodiments, the pressing mechanism is disposed on a side of the tape facing away from the pole piece or diaphragm. By using the pushing mechanism to act on the tape rather than on the pole piece or diaphragm, the tensile deformation damage caused by the pushing mechanism to the pole piece or diaphragm can be avoided.

In some embodiments, the pushing mechanism includes a first flat plate, and the first flat plate is disposed opposite to the adhesive tape. By pushing the tape through the first flat plate, the double-sided tape can be flatly applied to the pole piece or diaphragm, thereby reducing wrinkles or tilting of the double-sided tape during the application process.

In some embodiments, the pushing mechanism includes a moving roller for the adhesive tape to bypass. The tape is adhered through a moving roller, which has a simple structure and saves space.

In some embodiments, the glue applying mechanism further includes a pressure-bearing mechanism, and the pressure-bearing mechanism and the glue punching mechanism are spaced apart to form a channel for the tape and the pole piece or diaphragm to pass through. The pressure-bearing mechanism can support the pole piece or diaphragm, thereby reducing the damage of the pole piece or diaphragm under the pushing action of the pushing mechanism.

In some embodiments, a second flat plate is provided on a side of the pressure-bearing mechanism facing the adhesive tape. By cooperating with the first flat plate of the pushing mechanism and the second flat plate of the pressure-bearing mechanism, the inclination or wrinkling of the tape, pole piece and diaphragm under the pushing action of the pushing mechanism can be reduced, thereby improving the connection between the tape and the diaphragm or pole. The bonding strength of the film.

In some embodiments, the pressure-bearing mechanism is configured as a support roller, which is located in the running path of the pole piece or diaphragm and supports the pole piece or diaphragm. The contact surface between the support roller and the pole piece or diaphragm is small, which can reduce the wear of the pressure-bearing mechanism on the pole piece or diaphragm and improve the operational reliability of the pole piece or diaphragm.

In some embodiments, an elastic buffer layer is provided on the side of the pressure-bearing mechanism and/or the glue-discharging mechanism facing the pole piece or diaphragm. The elastic buffer layer can reduce the phenomenon that the pole piece or diaphragm is broken or damaged due to excessive impact on the pole piece by the glue punching mechanism during the glue application process.

In some embodiments, the gluing mechanism further includes at least one tension roller that supports the tape and a second driving mechanism that drives the tension roller. The second driving mechanism drives the tension roller to adjust the running posture of the tape. By adjusting the direction and force of the tension roller and the pole piece or diaphragm, the parallelism of the tape feeding can be ensured and the double-sided tape can be reduced from wrinkles or tilts during the application process.

In some embodiments, the glue punching mechanism includes a first flat plate, and the glue applying mechanism includes two tension rollers, and the two tension rollers are respectively disposed upstream and downstream of the glue punching mechanism. By arranging two tension rollers respectively upstream and downstream of the pressing mechanism, it is possible to reduce the phenomenon of tape tilting and wrinkles at the tape unwinding mechanism and/or tape rewinding mechanism due to excessive transmission distance of the tape.

This application provides a winding system. The winding system includes a pole piece conveying mechanism, a diaphragm conveying mechanism, and a gluing mechanism according to the present application. The gluing mechanism is configured corresponding to the pole piece conveying mechanism or the diaphragm conveying mechanism and is used to provide pole pieces. Or diaphragm glue.

The winding system proposed in the embodiment of this application can paste the double-sided tape on the head and tail of the separator or pole piece in advance through the glue application mechanism. This solves the problem of reducing poor coating of electrode components, wrinkles and warping of the head, and discounts on incoming materials. The problem.

In some embodiments, the winding system further includes a film joining mechanism, and the film joining mechanism is used to stick the pole piece or separator attached with double-sided tape to the corresponding separator or pole piece. Through the squeezing effect of the membrane-joining mechanism, the pole piece and the diaphragm can be firmly bonded together through double-sided tape.

In some embodiments, the film doubling mechanism includes two film doubling rollers, at least one of the two film doubling rollers is movable. By moving at least one film doubling roller in a direction close to the other film doubling roller, the pole piece or separator can be squeezed so that the pole piece and the separator are firmly bonded together through double-sided tape. The movement in the direction away from the other parallel film roller provides a running channel for the pole piece and diaphragm.

The above description is only an overview of the technical solutions of the present application. In order to have a clearer understanding of the technical means of the present application, they can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable. , the specific implementation methods of the present application are specifically listed below.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be construed as limiting the application. Also, the same parts are represented by the same reference numerals throughout the drawings. In the attached picture:

Figure 1 is a schematic structural diagram of a winding system according to some embodiments of the present application;

Figure 2 is a schematic structural diagram of the glue applying mechanism according to the first embodiment of the present application;

Figure 3 is a schematic structural diagram of the glue applying mechanism according to the second embodiment of the present application;

Figure 4 is a schematic structural diagram of a tape mechanism according to some embodiments of the present application.

Some reference numbers in the specific implementation are as follows:

100 winding system; 110 electrode assembly;

10 the first diaphragm conveying mechanism, 101 the first diaphragm, 11 the first diaphragm unwinding roller, 12 the first diaphragm conveying roller;

20 first pole piece conveying mechanism, 201 cathode piece, 21 first pole piece unwinding roller, 22 first pole piece conveying roller;

30 second diaphragm conveying mechanism, 301 second diaphragm, 31 second diaphragm unwinding roller, 32 second diaphragm conveying roller;

40 second pole piece conveying mechanism, 401 anode piece, 41 second pole piece unwinding roller, 42 second pole piece conveying roller;

200 Gluing mechanism, 210 Pressure-bearing mechanism, 211 Second flat plate, 220 Glue punching mechanism, 221 First driving mechanism, 222 Pushing mechanism, 2221 First flat plate, 2222 Elastic buffer layer, 230 First tensioning roller, 231 Two driving mechanisms, 240 second tension roller, 250 support roller, 260 moving roller;

400 tape, 410 double-sided tape, 420 release paper, 430 tape unwinding mechanism, 440 tape rewinding mechanism;

500 film doubling mechanism, 510 first film doubling roller, 520 second film doubling roller, 530 third film doubling roller, 540 fourth film doubling roller;

600 cutting device.

Detailed ways

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

Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the technical field belonging to this application; the terms used herein are for the purpose of describing specific embodiments only and are not intended to be used in Limitation of this application; the terms "including" and "having" and any variations thereof in the description and claims of this application and the above description of the drawings are intended to cover non-exclusive inclusion.

In the description of the embodiments of this application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying the relative importance or implicitly indicating the quantity or specificity of the indicated technical features. Sequence or priority relationship. In the description of the embodiments of this application, "plurality" means two or more, unless otherwise explicitly and specifically limited.

Reference herein to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of this application, the term "and/or" is only an association relationship describing associated objects, indicating that there can be three relationships, such as A and/or B, which can mean: A exists alone, and A exists simultaneously and B, there are three cases of B alone. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

In the description of the embodiments of this application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to It is more than two pieces (including two pieces).

In the description of the embodiments of this application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right" and "vertical" "Horizontal", "vertical", "parallel", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship as follows: The orientations or positional relationships shown in the drawings are only for convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore It cannot be understood as a limitation on the embodiments of this application.

In the description of the embodiments of this application, unless otherwise clearly stated and limited, technical terms such as "installation", "connection", "connection" and "fixing" should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. It can be disassembled and connected, or integrated; it can also be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

It should be noted that the electrode assembly is the component that undergoes electrochemical reactions in the battery cell. The electrode assembly is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and usually there is a separator between the positive electrode sheets and the negative electrode sheets. The portions of the positive electrode sheet and the negative electrode sheet that contain active material constitute the main body of the electrode assembly, and the portions of the positive electrode sheet and the negative electrode sheet that do not contain active material each constitute the tabs. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or respectively located at both ends of the main body. During the charging and discharging process of the battery, the positive active material and negative active material react with the electrolyte, and the tabs are connected to the electrode terminals to form a current loop.

The existing battery winding manufacturing process involves processes such as pole piece feeding, cutting and finishing. During the pole piece feeding, cutting and finishing processes, problems such as folding or wrinkling often occur at the head and tail of the pole piece. Affect the quality of the battery. Specifically, battery winding is an electrode assembly manufacturing process in which the cathode and anode sheets and separators are arranged in order and wound on a winding needle in the order of feeding to make an electrode assembly. When the cathode and anode sheets are being rolled into the material, there is no tension constraint on the pole sheets at the head. There is no tension constraint on the cathode and anode sheets after they are cut off and wound up. As a result, the freedom of width of the cathode and anode sheets cannot be limited, which easily causes winding problems. The tail Overhng (the anode coating the cathode) failed.

In order to solve the technical problem of improper operation of the head and tail of the pole piece in the battery winding manufacturing process on the market, the winding system is proposed to use the double-sided tape in advance through the glue application mechanism by using the separator to be continuous during the winding process and cut after turning over. Paste it on the diaphragm or the pole pieces at the head and tail, and then use the winding system to make the head and tail of the pole piece bonded to the diaphragm, so that the pole piece rolls with the diaphragm, thereby avoiding the head and tail deviation of the pole piece causing overhang. (Anode coated cathode) problem. Moreover, the glue-applying mechanism provided by this application can be simple to use and takes up little space, so that the pole piece and the diaphragm are bonded together through double-sided tape, and can especially be bonded to the diaphragm at the head and tail parts of the pole piece to solve the problem. The electrode assembly is poorly covered, the head is wrinkled and warped, and the incoming material is discounted. In addition, by pasting the pole pieces or diaphragms with multiple spaced double-sided tapes, the glue cutting process and space can be omitted, improving work efficiency and saving space.

As shown in Figure 1, this application provides a winding system 100. As shown in Figure 2, it provides a glue application mechanism 200 according to the first embodiment of this application. As shown in Figure 3, it provides a second implementation of this application. A gluing mechanism 200 according to the example, wherein the winding system 100 includes the gluing mechanism 200 of the first embodiment of this application or the gluing mechanism 200 of the second embodiment of this application. Below, the gluing mechanism is combined with the winding mechanism. System 100 is described in detail.

As shown in Figure 1, the winding system 100 provided by this application includes a pole piece conveying mechanism, a diaphragm conveying mechanism, and a gluing mechanism 200. The gluing mechanism 200 is provided corresponding to the pole piece or diaphragm and is used to double-sided the pole piece or diaphragm. Glue 410.

In this embodiment, specifically, the winding system 100 includes a first pole piece conveying mechanism 20 , a second pole piece conveying mechanism 40 , a diaphragm conveying mechanism, and a film doubling mechanism 500 , and the doubling mechanism 500 is configured according to the glue applying mechanism 200 It is set downstream of the position. When the double-sided tape 410 has been attached to the diaphragm or pole piece, the pole piece or diaphragm is pushed by the corresponding film joining mechanism 500 so that the pole piece and the diaphragm are bonded through the double-sided tape 410.

Further, the first pole piece conveying mechanism 20 is one of the cathode piece conveying mechanism or the anode piece conveying mechanism, and the second pole piece conveying mechanism 40 is the other one of the cathode piece conveying mechanism or the anode piece conveying mechanism. For convenience of explanation, Taking the first pole piece conveying mechanism 20 as the cathode piece conveying mechanism and the second pole piece conveying mechanism 40 as the anode piece conveying mechanism as an example, the membrane mechanism 500 is disposed in the first pole piece conveying mechanism 20 and the second pole piece conveying mechanism. The laminated position of the mechanism 40 or the separator transport mechanism enables the cathode sheet 201 and/or the anode sheet 401 and the separator to be bonded at the laminated position.

In this application, the first pole piece transporting mechanism 20 is a cathode sheet transporting mechanism and the second pole sheet transporting mechanism 40 is an anode sheet transporting mechanism as an example for description.

In the embodiment of the present application, during the winding process of the battery electrode assembly, when the cathode and anode sheets are rolled in and cut off, the double-sided tape 410 is first bonded to the electrode sheet or separator, and then the double-sided tape 410 is bonded to the electrode sheet or separator through the film joining mechanism 500. The squeezing effect can bond the starting and ending ends of the pole pieces to the diaphragm, so that the starting and ending ends of the pole pieces will not have poor head-to-tail coating and head intrusion caused by pole piece offset during winding. Material discounts and wrinkles.

In some embodiments, as shown in FIG. 1 , the winding system 100 also includes a film joining mechanism 500 . The film joining mechanism 500 is used to stick the pole piece or separator with the double-sided tape 410 to the corresponding separator or pole piece. .

In this embodiment, the winding system 100 includes a first diaphragm conveying mechanism 10 , a first pole piece conveying mechanism 20 , a second diaphragm conveying mechanism 30 and a second pole piece conveying mechanism 40 arranged in sequence. The first diaphragm conveying mechanism 10 And/or the second membrane conveying mechanism 30 is provided with a membrane doubling mechanism 500 . After the double-sided tape 410 has been attached to the diaphragm or pole piece, the pole piece and the diaphragm are bonded through the corresponding film joining mechanism 500 through the double-sided tape 410. The pole piece is fed with the diaphragm, so that there will be no pole pieces. The head will be discounted or wrinkled, and there will be no poor coating of the pole pieces. Through the squeezing action of the film joining mechanism 500 in the embodiment of the present application, the pole piece and the separator can be firmly bonded together through the double-sided tape 410 .

In some embodiments, as shown in Figure 1, the doubling mechanism 500 includes two doubling rollers, at least one of the two doubling rollers is movable.

In this embodiment, for example, as shown in Figure 1, the first film doubling roller 510 of the film doubling mechanism 500 can move, and the first diaphragm 101 can be pushed to the second film doubling roller 520 through the movement of the first film doubling roller 510. The cathode sheet 201 is then bonded to the first separator 101 and the cathode sheet 201 through double-sided tape 410. The third film doubling roller 530 of the film doubling mechanism 500 can move, and the third film doubling roller 530 can move. The second separator 301 is pushed to the anode sheet 401 at the fourth film joining roller 540, and the anode sheet 401 and the second separator 301 can be firmly bonded through the double-sided tape 410.

In the embodiment of the present application, at least one film doubling roller moves in a direction close to another film doubling roller, and the pole piece or separator can be squeezed through the relative movement of the two film doubling rollers, so that the pole piece and the separator pass through the double-sided tape 410 Firmly bonded together, it is also possible to provide a channel for the pole piece and the separator by moving at least one film doubling roller in a direction away from the other doubling roller so that the pole piece and the separator can pass smoothly.

The specific implementation is described below with reference to the winding system 100 of the present application shown in Figure 1:

The winding system 100 is mainly realized through two major mechanisms: first, the glue application mechanism 200 provided by this application. The glue application mechanism 200 is provided in the film doubling mechanism 500 of the winding system 100 (the first film doubling roller shown in Figure 1 510 and the second film merging roller 520), the glue application mechanism 200 includes the double-sided tape 410 of the driving tape 400 to be applied to the pole piece (the cathode piece 201 shown in Figure 1) or the diaphragm (the third film shown in Figure 1). A driving device for the diaphragm 101); secondly, the film doubling mechanism 500, taking the solution in which the double-sided tape 410 is attached to the diaphragm (the first diaphragm 101 as shown in Figure 1) as an example, is driven by a driving mechanism such as a cylinder to first The doubling roller 510 pushes the part of the first separator 101 with the double-sided tape 410 to the position of the cathode sheet 201, and the first doubling roller 510 of the doubling mechanism 500 presses the second doubling roller 510 of the doubling mechanism 500. A diaphragm 101 and a cathode piece 201 are bonded together through double-sided tape 410, and then the cylinder of the membrane mechanism 500 is retracted, and then the cutting device 600 cuts the pole piece, waiting for the next step.

The embodiment of the present application proposes that by bonding the head and tail of the pole piece to the diaphragm through double-sided tape 410, it is possible to improve the head feeding and folding caused by the excessive angle between the feeding part of the pole piece and the diaphragm. Wrinkle problem. In addition, by bonding the head and tail of the pole piece to the diaphragm, it can also improve the problem of misjudgment caused by CCD (camera vision detection) detection errors caused by the excessive angle between the feeding part of the pole piece and the diaphragm.

It should be noted that the embodiments of the present application only elaborate on the structures in the winding system 100 related to the invention, and do not mean that the winding system 100 does not have other structures, for example, the first diaphragm of the winding system 100 The conveying mechanism 10 is also provided with a first diaphragm unwinding roller 11 and a first diaphragm conveying roller 12. The first pole piece conveying mechanism 20 of the winding system 100 is also provided with a first pole piece unwinding roller 21 and a first pole piece conveying roller. roller 22, the second separator conveying mechanism 30 of the winding system 100 is also provided with a second separator unwinding roller 31 and a second separator conveying roller 32, and the second pole piece conveying mechanism 40 of the winding system 100 is also provided with a second pole The film unwinding roller 41 and the second pole piece conveying roller 42.

The upstream or downstream in this application refers to the sequence before and after the processing steps.

The glue applying mechanism 200 of this application is introduced in detail below.

As shown in Figure 2, the glue application mechanism 200 provided by the present application includes a tape unwinding mechanism 430, a glue punching mechanism 220 and a tape rewinding mechanism 440. The tape unwinding mechanism 430 is used to unwind the tape 400. The tape 400 is provided with an edge A plurality of double-sided tapes 410 are spaced apart in the roll direction. The glue punching mechanism 220 is located downstream of the tape unwinding mechanism 430. The glue punching mechanism 220 can move back and forth to fit the double-sided tape 410 to the pole piece or diaphragm. The tape rewinding mechanism 440 is located downstream of the glue punching mechanism 220 and is used to rewind the tape.

As shown in Figure 4, the tape 400 includes a release paper 420 and a double-sided tape 410 attached to the release paper 420, and the double-sided tape 410 of the tape 400 faces the pole piece or separator. Each time the pole piece is rolled up and finished, When, the tape rewinding mechanism 440 pulls the tape, so that the double-sided tape 410 on the tape 400 reaches the designated position (within the stamping range of the punching mechanism 220) in advance, and then the punching mechanism 220 punches the double-sided tape 410 on the tape 400 to After the diaphragm or pole piece is on, the glue punching mechanism 220 returns, the double-sided tape 410 is attached to the diaphragm or pole piece, and the tape winding mechanism 440 simultaneously winds up the release paper 420 of the tape until the next double-sided tape 410 reaches the designated position. In this way, the purpose of bonding the double-sided tape 410 to the head and tail parts of the pole piece or diaphragm is achieved.

The glue application mechanism 200 provided in this embodiment can adhere the double-sided tape 410 to the head and tail parts of the pole piece or the separator, so that the head and tail parts of the pole piece and the separator can be bonded, thereby solving the problem of poor coating of the electrode assembly and the problem of head and tail problems. The problem of wrinkles and warping of parts and discount of incoming materials.

In addition, multiple spaced-apart double-sided tapes 410 are pasted onto the pole piece or diaphragm through the glue punching mechanism 220, which can save the glue cutting process and space. At the same time, the glue punching mechanism 220 has a simple structure and fast cycle time, which improves work efficiency and saves money. space.

As shown in Figure 4, the double-sided tape 410 of the tape 400 is distributed on the release paper 420 of the tape 400 at intervals. The length of the double-sided tape 410 is selected according to the size of the pole piece and diaphragm, and the width can meet the bonding requirements. Select the shortest width below. Taking the width of the pole piece as 200mm as an example, the width of the double-sided tape 410 is between 100mm and 180mm. The double-sided tape 410 to be attached to the pole piece or diaphragm can be a whole section or separate ( The separate double-sided tape 410 can save the material of the double-sided tape 410). The size selection principle of the double-sided tape 410 is to try to choose the smallest area that meets the requirements. The length range of the double-sided tape 410 is 5mm-10mm. The double-sided tape 410 can be rectangular, triangular, polygonal or circular. The double-sided tape 410 can be made of a variety of materials. For example, the base material of the double-sided tape 410 can be PET, PP, etc., and the glue can be acrylic resin, etc. That is to say, on the basis of satisfying the requirement of adhesive for the counter electrode piece or separator, the embodiment of the present application can achieve the purpose of saving the double-sided tape 410 to the maximum extent.

In some embodiments, as shown in FIG. 2 , the glue punching mechanism 220 includes a first driving mechanism 221 and a pushing mechanism 222 . The first driving mechanism 221 drives the pushing mechanism 222 to approach or move away from the adhesive tape.

In this embodiment, the first driving mechanism 221 includes a linear driving mechanism such as a pneumatic cylinder, a hydraulic cylinder, and a motor. The pressing mechanism 222 includes a flat plate or a roller. The pressing action of the glue punching mechanism 220 is driven by the first driving mechanism 221. 222 is completed, the first driving mechanism 221 is connected to the PLC, and the PLC controls the punching action and position of the punching mechanism 220. When the pole piece is rolled in and finished each time, the tape rewinding mechanism 440 pulls the tape, so that the tape on the tape The double-sided tape 410 reaches the designated position in advance (within the stamping range of the punching mechanism 220), and then the PLC controls the first driving mechanism 221 to drive the pushing mechanism 222. After the double-sided tape 410 is punched onto the diaphragm or pole piece, the first driving mechanism 221 drives the pushing mechanism 222 to return, the double-sided tape 410 is attached to the diaphragm or pole piece, and the tape rewinding mechanism 440 synchronously rewinds the release paper 420 of the tape until the next double-sided tape 410 reaches the designated position, thereby achieving the desired position. The purpose of gluing the head and tail parts of the pole piece or diaphragm.

The pressing action of the pressing mechanism 222 in the embodiment of the present application is completed by the first driving mechanism 221 such as a pneumatic cylinder or a hydraulic cylinder, and the reciprocating movement of the pressing mechanism 222 is controlled by PLC. Through the reciprocating glue application action of the pressing mechanism 222, Glue the pole piece or diaphragm in multiple working cycles to improve the bonding efficiency between the double-sided tape 410 and the diaphragm or pole piece.

It should be noted that the embodiment of the present application does not limit the location of the pressing mechanism 222 because the pressing mechanism 222 can be arranged on the side of the tape 400 away from the pole piece or diaphragm, or it can also be arranged on the pole piece. Or the side of the diaphragm facing away from the adhesive tape 400. Both of these two placement positions of the pressing mechanism 222 fall within the protection scope of the embodiments of the present application.

In some optional embodiments, as shown in FIG. 2 , the pressing mechanism 222 is disposed on the side of the tape 400 facing away from the pole piece or diaphragm.

During the working process, the glue punching mechanism 220 reciprocally pushes the tape 400 to the pole piece or diaphragm, so that the double-sided tape 410 on the tape 400 fits to the pole piece or diaphragm. In the embodiment of the present application, the pushing mechanism 222 acts on the tape 400 Instead of acting on the pole piece or the diaphragm, the tensile deformation damage caused by the pushing mechanism 222 to the pole piece or the diaphragm can be avoided.

In some embodiments, as shown in FIG. 2 , the pressing mechanism 222 includes a first flat plate 2221 , and the first flat plate 2221 is disposed opposite to the adhesive tape.

In this embodiment, the thickness, shape and distribution method of the first flat plate 2221 are not limited and can be determined according to the environmental space where the first flat plate 2221 is located. When the first flat plate 2221 acts on the adhesive tape 400, the first flat plate 2221 The pressing surface is set opposite to the tape 400, and the projection surface of the pressing surface on the tape 400 can cover at least one piece of double-sided tape 410, so that the first flat plate 2221 can completely push the double-sided tape 410 to the pole piece. Or on the diaphragm, to reduce the phenomenon that the double-sided tape 410 is not firmly bonded to the pole piece or diaphragm.

In the embodiment of the present application, by arranging a pressing plane opposite to the tape 400 on the pressing mechanism 222, the purpose of flatly applying the double-sided tape 410 to the pole piece or diaphragm through the pressing surface can be achieved, thereby reducing the need for the double-sided tape 410 to be applied. Wrinkles or tilts may occur during the glueing process.

Furthermore, the pressing plane of the first flat plate 2221 can be parallel to the adhesive tape to better ensure the adhesive effect.

As shown in FIG. 3 , in some embodiments, the second embodiment of the present application provides a glue applying mechanism 200 . The pushing mechanism 222 includes a moving roller 260 , and the moving roller 260 is used for the adhesive tape 400 to bypass.

In this embodiment, the gluing mechanism 200 applies roller gluing to the pole pieces or separators by directly arranging the tape unwinding mechanism 430 for dispensing glue and the tape rewinding mechanism 440 for retracting the release paper 420 on the poles. The same side of the piece or diaphragm, and at least part of the tape 400 is wrapped around the moving roller 260, and then the driving mechanism drives the moving roller 260 to fit the double-sided tape 410 on the tape 400 to the pole piece or diaphragm, and simultaneously rotate the tape to unwind. mechanism 430 and tape winding mechanism 440, so that the double-sided tape 410 can be attached to the pole piece or diaphragm under the force of the moving roller 260.

Specifically, at least part of the tape 400 cooperates with the moving roller 260 to form a U-shaped tape. The moving roller 260 is disposed in the U-shaped groove of the U-shaped tape and drives the U-shaped tape to run in the direction of the pole piece or diaphragm. The U-shaped groove formed by the U-shaped tape cooperates with the arc surface of the moving roller 260, which can improve the matching degree between the tape 400 and the moving roller 260, so that the tape 400 can move smoothly to the pole piece or diaphragm under the driving of the moving roller 260. This reduces the occurrence of wrinkles or loose fitting of the tape 400 during the transportation process. The gluing mechanism 200 in the embodiment of the present application uses a roller pasting method to glue the pole piece or diaphragm, and drives the moving roller 260 through a driving mechanism such as a pneumatic cylinder and a hydraulic cylinder to stick the double-sided tape on the tape to the pole piece or diaphragm. By rotating the tape unwinding mechanism 430 and the tape rewinding mechanism 440 at the same time, the double-sided tape 410 can be attached to the pole piece or diaphragm under the action of the moving roller 260. The embodiment of the present application realizes the lamination of the adhesive tape 400 through the moving roller 260, which has a simple structure and saves space.

As shown in Figure 2, in some embodiments, the glue application mechanism also includes a pressure-bearing mechanism 210. The pressure-bearing mechanism 210 and the glue punching mechanism 220 are spaced apart to form a channel for the tape 400 and the pole piece or diaphragm to pass through.

In some embodiments, the pressure-bearing mechanism 210 , the adhesive tape 400 and the glue-discharging mechanism 220 are arranged in sequence, and the pole pieces or diaphragms are located between the pressure-bearing mechanism 210 and the adhesive tape 400 , or the pole pieces or diaphragms are located between the adhesive-applying mechanism 220 and the adhesive tape. 400 , the glue punching mechanism 220 can reciprocally push the tape 400 or the pole piece or diaphragm to the pressure-bearing mechanism 210 so that the double-sided tape 410 is attached to the pole piece or diaphragm.

The pressure-bearing mechanism 210 in the embodiment of the present application can support the pole piece or diaphragm, thereby reducing the damage of the pole piece or diaphragm under the pushing action of the glue punching mechanism 220. Through the pressure-bearing mechanism 210 and the glue punching mechanism, The combination of 220 can improve the bonding strength between the tape 400 and the diaphragm or pole piece.

As shown in FIG. 2 , in some embodiments, a second flat plate 211 is provided on the side of the pressure-bearing mechanism 210 facing the adhesive tape 400 .

In this embodiment, the part of the tape 400 that interacts with the pole piece or diaphragm is set to run parallel to the pole piece or diaphragm. The thickness, shape and distribution method of the second flat plate 211 are not limited, and can be determined according to the location where the second flat plate 211 is located. Depending on the environmental space, the pressure-bearing surface of the second flat plate 211 is set opposite to the adhesive tape 400, so that the second flat plate 211 can fully support the double-sided tape 410, so that the double-sided tape 410 can fit to the pole piece or diaphragm. to reduce the phenomenon that the double-sided tape 410 is not firmly bonded to the pole piece or diaphragm. Further, the projected surface of the pressure-bearing surface on the tape 400 can cover the double-sided tape 410, so that the double-sided tape 410 can be completely attached to the pole piece or diaphragm.

In some embodiments, the pressure-bearing surface of the second flat plate 211 is set parallel to the adhesive part of the adhesive tape 400 to further reduce the phenomenon that the double-sided adhesive tape 410 is not firmly bonded to the pole piece or separator.

When the pushing mechanism 222 includes the first flat plate 2221, by cooperating in parallel with the first flat plate 2221 of the pushing mechanism 222 and the second flat plate 211 of the pressure-bearing mechanism, the pushing of the tape 400, pole piece and diaphragm in the glue punching mechanism 220 can be reduced. The tape 400 is tilted or wrinkled under pressure, thereby improving the bonding reliability between the tape 400 and the diaphragm or pole piece.

As shown in Figure 3, in some embodiments, in the glue application mechanism 200 provided by the second embodiment of the present application, the pressure-bearing mechanism is configured as a support roller 250. The support roller 250 is located in the running path of the pole piece or diaphragm and supports the pole piece. or diaphragm.

In this embodiment, the glue application mechanism 200 includes a moving roller 260 and a support roller 250 distributed on both sides of the tape 400. The support roller 250 is located in the running path of the pole piece or diaphragm and supports and guides the pole piece or diaphragm. The tape 400 faces the pole. Double-sided tape 410 is provided on one side of the sheet or diaphragm, and the moving roller 260 can drive the tape to run in the direction of the support roller 250, so that the double-sided tape 410 is attached to the pole piece or diaphragm.

The gluing mechanism 200 uses a roller method to glue the pole pieces or diaphragms, by directly arranging the tape unwinding mechanism 430 for dispensing glue and the tape rewinding mechanism 440 for retracting the release paper 420 on the same side of the pole pieces or diaphragms. , and the support roller 250 cooperates with the moving roller 260, at least part of the tape 400 is wrapped around the moving roller 260, and then the driving mechanism drives the moving roller 260 to fit the double-sided tape 410 on the tape 400 to the pole piece at the support roller 250 or On the diaphragm, at the same time, the tape unwinding mechanism 430 and the tape rewinding mechanism 440 are rotated, so that the double-sided tape 410 is attached to the pole piece or diaphragm under the squeezing force between the moving roller 260 and the support roller 250 .

The support roller 250 provided in the embodiment of the present application can not only support the pole piece or diaphragm, but also play the role of guiding the pole piece or diaphragm. Moreover, the contact surface between the support roller 250 and the pole piece or diaphragm is small. It can reduce the wear of the pole piece or diaphragm by the pressure-bearing mechanism and improve the operational reliability of the pole piece or diaphragm.

In some embodiments, an elastic buffer layer 2222 is provided on the side of the pressure-bearing mechanism 210 and/or the glue-discharging mechanism 220 facing the pole piece or diaphragm.

In this embodiment, an elastic buffer layer 2222 can be provided on the pressure-bearing surface of the pressure-bearing mechanism 210 and the pressing surface of the glue punching mechanism 220. The elastic buffer layer 2222 can be made of flexible material such as rubber or silicone. Buffering the force exerted by the pressure-bearing mechanism 210 and/or the glue punching mechanism 220 on the pole piece, diaphragm or tape 400 reduces the risk of the pole piece, diaphragm or tape 400 being damaged. Specifically, in the embodiment of FIG. 2 , the elastic buffer layer 2222 may be provided on the pressure-bearing surface of the second flat plate 211 or the pressing surface of the first flat plate 2221 . In the embodiment of FIG. 3 , the elastic buffer layer 2222 may be provided on the surface of the moving roller 260 or the supporting roller 250 .

In embodiments of the present application, by covering the working surface of the pressure-bearing mechanism 210 and/or the working surface of the glue dispensing mechanism 220 with an elastic buffer layer 2222, it is possible to reduce the excessive impact of the glue dispensing mechanism 220 on the electrode piece during the glue application process. The pole piece is broken or the pole piece is damaged.

In some embodiments, the thickness of the elastic buffer layer 2222 is smaller than the thickness of the pole piece, separator and tape 400, thereby reducing the risk of excessive thickness of the elastic buffer layer 2222 causing the pole piece, separator and tape 400 to come into contact with the elastic buffer layer 2222. Tilt or wrinkle phenomenon.

In some embodiments, the gluing mechanism also includes at least one tension roller supporting the tape 400 (the first tension roller 230 and the second tension roller 240 as shown in Figure 2) and a second drive that drives the tension roller. Mechanism 231, the second driving mechanism 231 drives the tension roller to adjust the running attitude of the tape 400.

In this embodiment, the tension roller is disposed on the side of the tape 400 facing away from the glue punching mechanism 220, and the side of the tension roller that cooperates with the tape 400 is set as a curved surface. The second driving mechanism 231 for driving the tension roller can be pneumatic. Cylinder, hydraulic cylinder or wax motor and other linear drive mechanisms, when the glue punching mechanism 220 pushes the tape 400, the tension roller is always in close contact with the tape 400, so as to achieve the purpose of supporting the tape 400 and guiding the tape 400, reducing the need for tape 400 appears tilted or wrinkled during movement.

By adjusting the position and force between the tension roller and the pole piece or diaphragm, the embodiment of the present application can ensure the parallelism between the tape 400 and the pole piece or diaphragm when applying the glue, and reduce the double-sided tape 410 during the glue application process. There are wrinkles or tilts.

In some embodiments, the glue punching mechanism includes a first flat plate 2221, and the glue applying mechanism includes two tensioning rollers (the first tensioning roller 230 and the second tensioning roller 240 as shown in Figure 2). The rollers are respectively arranged upstream and downstream of the glue punching mechanism.

In this embodiment, two tension rollers are respectively arranged upstream and downstream of the pressing mechanism 222 to achieve the purpose of two-point positioning and leveling of the tape 400. Specifically, the two tension rollers are arranged on the back of the tape 400. One side of the punching mechanism 220, and the side where the two tension rollers cooperate with the tape 400 is set as a curved surface. When the glue punching mechanism 220 pushes the tape 400, the two tension rollers are always in close contact with the tape 400, so as to This achieves the purpose of supporting the tape 400 and guiding the tape 400, and reducing the phenomenon of tilting or wrinkles of the tape 400 during movement.

By arranging two tension rollers respectively upstream and downstream of the pressing mechanism 222, the embodiment of the present application can also reduce the risk of the tape 400 being rolled up in the tape unwinding mechanism 430 and/or the tape rewinding due to the excessive transmission distance of the tape 400. The mechanism 440 is tilted and wrinkled.

The specific implementation of the glue application mechanism will be described below with the glue application mechanism of the first embodiment of the present application shown in Figure 2:

The gluing mechanism 200 of the embodiment of the present application adopts a flat sticking method to glue the pole pieces or diaphragms. The tape 400 is transported through the tape unwinding mechanism 430 and the tape rewinding mechanism 440. The tape 400 includes a release paper 420 and a release paper 420. The double-sided tape 410 on the paper 420, the pole piece or diaphragm passes from the bottom of the tape 400, and the transmission direction of the pole piece or diaphragm is perpendicular to the transmission direction of the tape, and the double-sided tape 410 of the tape 400 faces the pole piece or diaphragm, Two tension rollers are also provided between the tape unwinding mechanism 430 and the tape rewinding mechanism 440. The side of the tape 400 facing away from the double-sided tape 410 is provided with a glue punching mechanism 220 (glue punching mechanism) connected to a driving mechanism such as a cylinder. 220 is covered with an elastic material), and a pressure-bearing mechanism 210 is provided correspondingly on the side of the pole piece or diaphragm facing away from the adhesive tape.

The stamping action of the glue punching mechanism 220 is completed by the cylinder. The cylinder is connected to the PLC. The PLC controls the punching action and position of the glue punching mechanism 220. When the pole piece is rolled in and finished each time, the tape rewinding mechanism 440 pulls the tape. The double-sided tape 410 on the tape reaches the designated position in advance (within the stamping range of the glue punching mechanism 220), and then the PLC controls the glue punching mechanism to flush the double-sided tape 410 onto the diaphragm or pole piece, and then the glue punching mechanism 220 returns, and the double-sided tape 410 is flushed to the diaphragm or pole piece. The surface tape 410 is attached to the diaphragm or pole piece, and the tape rewinding mechanism 440 simultaneously rewinds the release paper 420 of the tape until the next double-sided tape 410 reaches the designated position. Through the cooperation of the glue punching mechanism 220 and the pressure-bearing mechanism 210, This reduces the risk of pole pieces or diaphragms being cut off.

Furthermore, the gluing process of the gluing mechanism can be carried out simultaneously when the pole piece is cut (cut by the cutting device 600 in Figure 1 ), without increasing the winding cycle time of the winding system 100, so that the gluing The action is complete. One of the biggest advantages of the glue application mechanism in the embodiment of the present application is that it can be made very compact, and the glue cutting process and space are omitted, and the layout space of the winding system can be maximized.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present application. The scope shall be covered by the claims and description of this application. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any way. The application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

A glue applying mechanism is used in a winding system, and the winding system is used to wind pole pieces and diaphragms to form an electrode assembly, which is characterized in that it includes:

A tape unwinding mechanism is used to unwind the tape, and the tape is provided with a plurality of double-sided tapes spaced apart along the unwinding direction;

A glue punching mechanism is located downstream of the tape unwinding mechanism. The glue punching mechanism can move back and forth to fit the double-sided tape to the pole piece or the diaphragm;

The tape rewinding mechanism is located downstream of the glue punching mechanism and is used to rewind the tape.
The glue applying mechanism according to claim 1, characterized in that the glue punching mechanism includes a first driving mechanism and a pushing mechanism, and the first driving mechanism drives the pushing mechanism to approach or move away from the tape.
The adhesive applying mechanism according to claim 2, wherein the pressing mechanism is disposed on a side of the adhesive tape facing away from the pole piece or diaphragm.
The adhesive applying mechanism according to claim 3, wherein the pressing mechanism includes a first flat plate, and the first flat plate is arranged opposite to the adhesive tape.
The adhesive applying mechanism according to claim 3, characterized in that the pushing mechanism includes a moving roller, and the moving roller is used for the adhesive tape to bypass.
The gluing mechanism according to any one of claims 1 to 5, characterized in that the gluing mechanism further includes a pressure-bearing mechanism, and the pressure-bearing mechanism is spaced apart from the glue punching mechanism to form a space for the adhesive tape. and the passage through which the pole piece or diaphragm passes.
The adhesive applying mechanism according to claim 6, characterized in that a second flat plate is provided on the side of the pressure-bearing mechanism facing the adhesive tape.
The glue application mechanism according to claim 6, characterized in that the pressure-bearing mechanism is configured as a support roller, and the support roller is located in the running path of the pole piece or the diaphragm and supports the pole piece or the diaphragm.
The glue application mechanism according to claim 7 or 8, characterized in that an elastic buffer layer is provided on the side of the pressure-bearing mechanism and/or the glue punching mechanism facing the pole piece or diaphragm.
The glue applying mechanism according to claim 1, characterized in that the glue applying mechanism further includes at least one tension roller supporting the tape and a second driving mechanism driving the tension roller, and the second driving mechanism The mechanism adjusts the running attitude of the tape by driving the tension roller.
The glue application mechanism according to claim 10, characterized in that the glue punching mechanism includes a first flat plate, the glue application mechanism includes two tension rollers, and the two tension rollers are respectively arranged on Describe the upstream and downstream parts of the glue punching mechanism.
A winding system, characterized in that the winding system includes a pole piece conveying mechanism, a diaphragm conveying mechanism and a gluing mechanism according to any one of claims 1 to 11, and the gluing mechanism corresponds to the The pole piece conveying mechanism or the diaphragm conveying mechanism is configured to apply glue to the pole piece or the diaphragm.
The winding system according to claim 12, characterized in that the winding system further includes a film doubling mechanism, the film doubling mechanism is used to stick the pole piece or separator with double-sided tape. to the corresponding diaphragm or pole piece.
The winding system according to claim 13, wherein the film doubling mechanism includes two film doubling rollers, and at least one of the two film doubling rollers is movable.