Composite winding device

Abstract

The utility model belongs to the technical field of pole piece composite winding, and discloses a composite winding device which comprises four gluing mechanisms, a first composite mechanism and a winding mechanism, the four gluing mechanisms are in one-to-one correspondence with four surfaces of two diaphragms, and each gluing mechanism is used for coating a gluing layer on the corresponding surface; the first compounding mechanism is used for compounding two pole pieces and two diaphragms, and the two diaphragms and the two pole pieces are alternately arranged and are bonded with each other through the gluing layers; and the winding mechanism is used for winding the compounded pole piece and diaphragm to form a battery cell. According to the composite winding device provided by the utility model, the compactness of the battery cell formed by winding is improved, the loosening probability of the battery cell is reduced, and the integrity and firmness of the battery cell are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pole piece composite winding, especially to a composite winding device. BACKGROUND

[0002] The structure of the battery cell mainly has the laminated type and the winding type, wherein the winding type cell is usually formed by winding the positive pole piece, the negative pole piece and the diaphragm on the winding equipment.

[0003] In the prior art, the winding equipment usually comprises a positive pole piece unwinding mechanism, a negative pole piece unwinding mechanism and a winding mechanism, the positive pole piece unwinding mechanism is used for unwinding the positive pole piece, the negative pole piece unwinding mechanism is used for unwinding the negative pole piece, and the winding mechanism is used for winding the positive pole piece, the diaphragm, the negative pole piece and the diaphragm. Specifically, when the diaphragm is fed, one surface of the diaphragm has adhesion, the positive pole piece is bonded with the surface of the diaphragm having adhesion, the negative pole piece is bonded with the surface of the other diaphragm having adhesion, then the positive pole piece, the negative pole piece and the two diaphragms are compounded in the placement order of the negative pole piece, the diaphragm, the positive pole piece and the diaphragm, and the winding mechanism is used for winding to form the winding type cell.

[0004] However, since only one surface of each diaphragm has adhesion, the diaphragm bonded with the negative pole piece cannot be fixed between the positive pole piece and the diaphragm, and the diaphragm bonded with the negative pole piece and the positive pole piece cannot be fixed between the adjacent two circles of the negative pole piece and the positive pole piece, thereby causing the winding type cell to be prone to looseness and the firmness to be improved. INVENTION CONTENTS

[0005] The utility model aims at providing a composite winding device, which improves the tightness of the cell formed by winding, reduces the probability of the cell looseness and improves the overall performance and firmness of the cell.

[0006] According to the above idea, the utility model adopts the technical scheme of:

[0007] The composite winding device comprises:

[0008] The glue coating mechanism is provided with four glue coating mechanisms, and the four glue coating mechanisms correspond to the four surfaces of the two diaphragms one by one, and each glue coating mechanism is used for coating the glue layer on the corresponding surface;

[0009] The first composite mechanism is used for compounding the two pole pieces and the two diaphragms, the two diaphragms and the two pole pieces are arranged alternately and bonded with each other through the glue layer;

[0010] The winding mechanism is used for winding the pole piece and the diaphragm after compounding to form the cell.

[0011] The utility model has the advantages of:

[0012] The composite winding device provided by the utility model, through setting four gluing mechanisms, can realize coating of gluing layer on each surface of two diaphragms, so that each surface of the two diaphragms has adhesion, the two sides of one diaphragm are used for bonding two pole pieces with different polarities, one side of the other diaphragm is bonded with one pole piece, and the other side can bond two layers of adjacent battery cells in the winding process, so that the diaphragm between the two pole pieces can be bonded with the two pole pieces and will not move relatively to the pole pieces, the two layers of adjacent battery cells can also be bonded through the gluing layer, thereby improving the compactness of the wound battery cell, reducing the probability of battery cell loosening, and improving the integrity and firmness of the battery cell.

[0013] And, through setting four gluing mechanisms, the four gluing mechanisms can simultaneously perform gluing work, meet the continuous work of the composite winding device, and improve the efficiency of the composite winding of the battery cell. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the description of the embodiments of the utility model will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the embodiments of the utility model and the drawings for those skilled in the art without creative labor.

[0015] Figure 1 It is the first structure schematic view of the composite winding device provided by the embodiments of the utility model;

[0016] Figure 2 It is the second structure schematic view of the composite winding device provided by the embodiments of the utility model;

[0017] Figure 3 It is the first structure schematic view of the first cutting mechanism provided by the embodiments of the utility model;

[0018] Figure 4 It is the second structure schematic view of the first cutting mechanism provided by the embodiments of the utility model;

[0019] Figure 5 It is the exploded view of the first cutting mechanism provided by the embodiments of the utility model;

[0020] Figure 6 It is the third structure schematic view of the composite winding device provided by the embodiments of the utility model;

[0021] Figure 7 It is the third structure schematic view of the composite winding device provided by the embodiments of the utility model; Figure 6 The enlarged view of A shown in the utility model

[0022] Figure 8It is the first structure schematic view of the gluing mechanism provided by the embodiment of the utility model;

[0023] Figure 9 It is the utility model Figure 8 The B-B section view shown in the figure.

[0024] Figure 10 It is the second structure schematic view of the gluing mechanism provided by the embodiment of the utility model.

[0025] Figure 11 It is the structure schematic view of the glue roller provided by the embodiment of the utility model.

[0026] Figure 12 It is the C-C section view shown in the figure. Figure 11

[0027] Figure 13 It is the D enlarged view shown in the figure. Figure 12

[0028] It is the third structure schematic view of the gluing mechanism provided by the embodiment of the utility model. Figure 14

[0029] It is the fourth structure schematic view of the gluing mechanism provided by the embodiment of the utility model. Figure 15 In the figure:

[0030]

[0031] 100, first composite mechanism, 200, winding mechanism,

[0032] 310, first gluing mechanism, 320, second gluing mechanism, 330, third gluing mechanism, 340, fourth gluing mechanism, 1, glue roller, 11, glue groove, 12, pit, 2, support assembly, 21, glue cavity, 211, opening, 22, support frame, 23, glue container, 3, glue scraping assembly, 31, first scraper, 32, second scraper, 4, gluing driving part, 5, first driving part, 6, second driving part, 7, first guide roller, 8, second guide roller, 9, base, 1a, glue containing disc,

[0033] 400, second composite mechanism, 410, first composite roller, 420, second composite roller, 430, composite driving part,

[0034] 500, first cutting mechanism, 510, cutting frame, 520, cutting driving part, 530, cutting knife, 540, cutting conveying assembly, 541, rotary driving part, 542, conveying main roller, 543, gap driving part, 544, conveying auxiliary roller, 550, bearing table, 551, first arc-shaped avoiding groove, 552, bearing surface, 560, support platform, 561, second arc-shaped avoiding groove, 562, support surface, 563, groove,​​

[0035] 600, mounting shell; 700, support frame; 710, first area; 720, second area; 730, third area; 800, pole piece unwinding mechanism; 900, diaphragm unwinding mechanism; 1000, second cutting mechanism;

[0036] 10, first diaphragm; 20, second diaphragm; 30, negative pole piece; 40, positive pole piece. DETAILED DESCRIPTION

[0037] To make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model will be further explained below in combination with the drawings and through specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for the convenience of description, not all.

[0038] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0039] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0040] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature. In the description of the embodiment, if not specially stated, "a plurality of" specifically refers to two or more than two.

[0041] In the description of the embodiments, the terms "upper", "lower", "right", "left", and the like, orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0042] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a mediating element.

[0043] The technical solutions of the present application will be further illustrated below in conjunction with the drawings and through specific embodiments.

[0044] The present embodiment provides a composite winding device for composite pole pieces and diaphragms, and winds the composite pole pieces and diaphragms to form a battery cell.

[0045] It should be noted that the battery cell in the present embodiment includes two pole pieces and two diaphragms. The two diaphragms are alternately arranged with the two pole pieces and are adhered to each other through a glue layer. The two pole pieces are a positive pole piece and a negative pole piece, and the two diaphragms are a first diaphragm and a second diaphragm. The stacking order of the positive pole piece, the negative pole piece, the first diaphragm, and the second diaphragm is negative pole piece, first diaphragm, positive pole piece, and second diaphragm. During winding, the second diaphragm is located in the inner circle.

[0046] As shown in Figure 1 and Figure 2 , the composite winding device includes four glue applying mechanisms, a first composite mechanism 100, and a winding mechanism 200. The four glue applying mechanisms correspond one-to-one to the four surfaces of the two diaphragms, and each glue applying mechanism is used to apply a glue layer to the corresponding surface, so that each diaphragm has a glue layer on both surfaces. In turn, the diaphragm and the pole piece, as well as the different layers of the battery cell, can be adhered through the glue layer.

[0047] The first composite mechanism 100 in the present embodiment is used to composite the two pole pieces and the two diaphragms. The two pole pieces and the two diaphragms have been stacked in a certain order before being conveyed to the first composite mechanism 100. After passing through the first composite mechanism 100, the two pole pieces and the two diaphragms can be adhered to each other, thereby ensuring the relative position of the two pole pieces is fixed, so that the battery cell can work normally. The winding mechanism 200 in the present embodiment is arranged downstream of the first composite mechanism 100, specifically, the winding mechanism 200 is located downstream of the first composite mechanism 100 in the conveying direction of the pole pieces. The winding mechanism 200 is used to wind the two pole pieces and the two diaphragms after being composited, to form a wound battery cell.

[0048] Exemplarily, the first compounding mechanism 100 can be a structure in the prior art, for example, the first compounding mechanism 100 includes two compounding rollers which are oppositely arranged and can roll two pole pieces and two diaphragms to realize compounding. Of course, it can be understood that the first compounding mechanism 100 can also realize compounding between the two pole pieces and the two diaphragms through a compounding plate, and the present embodiment is not limited thereto.

[0049] Optionally, the winding mechanism 200 can be a winding needle in the prior art, and details thereof are not described herein.

[0050] The compounding and winding device provided in the present embodiment can realize coating of a glue layer on each surface of the two diaphragms through the four glue coating mechanisms, so that each surface of the two diaphragms has adhesion, the two sides of one diaphragm are used for bonding two pole pieces with different polarities, one side of the other diaphragm is bonded with one pole piece, and the other side can bond two adjacent layers of the battery cell in the winding process, so that the diaphragm between the two pole pieces can be bonded with the two pole pieces and cannot move relative to the pole pieces, and the two adjacent layers of the battery cell can also be bonded through the glue layer, thereby improving the tightness of the battery cell wound, reducing the probability of loosening of the battery cell, and improving the integrity and firmness of the battery cell.

[0051] Moreover, the four glue coating mechanisms can simultaneously perform glue coating work, meet the continuous work of the compounding and winding device, and improve the efficiency of compounding and winding of the battery cell.

[0052] Exemplarily, the compounding and winding device further includes two second compounding mechanisms 400, each second compounding mechanism 400 corresponds to one pole piece and one diaphragm, and each second compounding mechanism 400 is used for compounding the corresponding pole piece and diaphragm. Specifically, one of the second compounding mechanisms 400 is used for compounding the negative pole piece 30 and the first diaphragm 10, and the other second compounding mechanism 400 is used for compounding the positive pole piece 40 and the second diaphragm 20.

[0053] For the convenience of distinction, in the present embodiment, the first compounding mechanism 100 is referred to as a first compounding mechanism, the second compounding mechanism 400 is referred to as a second compounding mechanism, the first diaphragm 10 is referred to as a first diaphragm, the second diaphragm 20 is referred to as a second diaphragm, the negative pole piece 30 is referred to as a negative pole piece, and the positive pole piece 40 is referred to as a positive pole piece. Figure 2As shown, the four glue coating mechanisms are a first glue coating mechanism 310, a second glue coating mechanism 320, a third glue coating mechanism 330, and a fourth glue coating mechanism 340. The first glue coating mechanism 310 and the second glue coating mechanism 320 are used to coat the two surfaces of one of the two separators with a glue layer. In the conveying direction of the pole piece, one of the two second composite mechanisms 400 is arranged downstream of the first glue coating mechanism 310 and is used to composite the negative pole piece 30 and the first separator 10. The composite is performed immediately after the glue coating, which can improve the adhesion effect of the negative pole piece 30 and the first separator 10 and reduce the probability of dust and sundries depositing on the glue layer. The first glue coating mechanism 310 is used to coat one surface of the first separator 10 with a glue layer, and the second glue coating mechanism 320 is arranged downstream of the one of the two second composite mechanisms 400 to coat the other surface of the first separator 10 with a glue layer so as to facilitate the adhesion of the other surface of the first separator 10 to the positive pole piece 40. It should be noted that in the conveying direction of the negative pole piece 30, the one of the two second composite mechanisms 400 is arranged downstream of the first glue coating mechanism 310 and upstream of the second glue coating mechanism 320 in the embodiment.

[0054] Optionally, in the conveying direction of the pole piece, the second glue coating mechanism 320 is arranged upstream of the first composite mechanism 100, so that after the second glue coating mechanism 320 coats the surface of the first separator 10 facing the positive pole piece 40 with a glue layer, the first composite mechanism 100 composites the two pole pieces and the two separators to adhere the positive pole piece 40 to the second separator 20. It should be noted that in the conveying direction of the negative pole piece 30, the second glue coating mechanism 320 is arranged upstream of the first composite mechanism 100 in the embodiment.

[0055] Please continue to refer to Figure 2 The third glue coating mechanism 330 and the fourth glue coating mechanism 340 are used to coat the two surfaces of the other one of the two separators with a glue layer. In the conveying direction of the pole piece, the other one of the two second composite mechanisms 400 is arranged downstream of the third glue coating mechanism 330 and upstream of the second glue coating mechanism 320. In the conveying direction of the positive pole piece 40, the other one of the two second composite mechanisms 400 is arranged downstream of the third glue coating mechanism 330 and upstream of the second glue coating mechanism 320 in the embodiment. The other one of the two second composite mechanisms 400 is used to composite the positive pole piece 40 and the second separator 20. The two second composite mechanisms 400 cooperate with the three glue coating mechanisms to coat the two surfaces of the first separator 10 and the one surface of the second separator 20 with a glue layer before the first composite mechanism 100, so that the negative pole piece 30, the first separator 10, the positive pole piece 40, and the second separator 20 can be firmly adhered and composited together.

[0056] In some optional embodiments, the fourth glue coating mechanism 340 is arranged downstream of the first compounding mechanism 100 and upstream of the winding mechanism 200 in the conveying direction of the pole piece, and is configured to coat a glue layer on the surface of the second separator 20 facing away from the positive pole piece 40, so that the adjacent two layers of the battery cell can be firmly bonded together during winding.

[0057] It should be noted that, as shown in Figure 2 the spacing between the first glue coating mechanism 310 and the second compounding mechanism 400 for compounding the first separator 10 and the negative pole piece 30 is small, the spacing between the second glue coating mechanism 320 and the first compounding mechanism 100 is small, the spacing between the third glue coating mechanism 330 and the second compounding mechanism 400 for compounding the second separator 20 and the positive pole piece 40 is small, and the spacing between the fourth glue coating mechanism 340 and the winding mechanism 200 is small, so that the separator can be compounded as soon as possible after being coated with glue, the properties of the glue will not change greatly, the adhesion can be maintained at a high level, and impurities will not be mixed, so the purity is high, thereby further improving the compounding effect.

[0058] In this embodiment, the pole pieces are continuous, but the pole pieces bonded to the separators are segmented rather than continuous, so the pole pieces need to be cut before being compounded with the corresponding separators. As shown in Figure 1 and Figure 3 the compounding and winding device further comprises two first cutting mechanisms 500. The two first cutting mechanisms 500 correspond to the two second compounding mechanisms 400 one by one, and each first cutting mechanism 500 is arranged upstream of the corresponding second compounding mechanism 400 in the conveying direction of the pole pieces. The two first cutting mechanisms 500 are both configured to cut the pole pieces, and one first cutting mechanism 500 is configured to cut the positive pole piece 40, and the other first cutting mechanism 500 is configured to cut the negative pole piece 30.

[0059] In some optional embodiments, the first cutting mechanism 500 can be connected to the second compounding mechanism 400 to shorten the conveying distance of the cut pole pieces, and after the cut pole pieces are bonded to the separators, the pole pieces and the separators can be conveyed together.

[0060] Exemplarily, as shown in Figure 3 the first cutting mechanism 500 comprises a cutting frame 510, a cutting driving member 520, a cutting knife 530, and a cutting conveying assembly 540.

[0061] The cutting driving member 520 is arranged on the cutting frame 510 and is used to drive the cutting knife 530 to move towards or away from the direction of the pole piece, so as to control the cutting knife 530 to cut the pole piece. The cutting conveying assembly 540 is used to convey the pole piece. For example, the cutting driving member 520 drives the cutting knife 530 to act, so as to cut the pole piece into a composite part (not shown in the figure) and a remaining part (not shown in the figure). The composite part refers to the part to be compounded with the diaphragm. In the conveying direction of the pole piece, the cutting conveying assembly 540 is arranged upstream of the cutting knife 530 and is used to convey the remaining part intermittently, so that there is a spacing between the composite parts compounded on the diaphragm. The second compounding mechanism 400 in the embodiment is used to compound the diaphragm and the composite part, so as to bond the composite part on the diaphragm. For example, the cutting driving member 520 can be a linear driving component such as a pneumatic cylinder, and the embodiment is not limited in this regard.

[0062] It should be noted that before the pole piece is cut, one end of the pole piece with a cross section has contacted the corresponding second compounding mechanism 400, and after the pole piece is cut, the composite part moves under the traction of the second compounding mechanism 400 and is compounded with the diaphragm. The remaining part is conveyed by the cutting conveying assembly 540 after a period of time, so that the cross section of the remaining part located at the cutting knife 530 can move to contact the corresponding second compounding mechanism 400. When the length of the pole piece located on the side of the cutting knife 530 towards the second compounding mechanism 400 meets the requirements, the cutting knife 530 driving member drives the cutting knife 530 to cut the pole piece, so as to realize the compounding of each composite part with the diaphragm.

[0063] The embodiment provides a cutting conveying assembly 540. In some optional embodiments, as shown in Figure 4 The cutting conveying assembly 540 includes a rotation driving member 541, a conveying main roller 542, a gap driving member 543 and a conveying auxiliary roller 544. The rotation driving member 541 and the gap driving member 543 are both arranged on the cutting frame 510. The rotation driving member 541 is used to drive the conveying main roller 542 to rotate. The conveying auxiliary roller 544 is arranged opposite to the conveying main roller 542 in the movement direction of the cutting knife 530, and the conveying auxiliary roller 544 and the conveying main roller 542 cooperatively clamp the pole piece. The gap driving member 543 is used to drive the conveying auxiliary roller 544 to move towards or away from the conveying main roller 542, so as to adjust the gap between the conveying main roller 542 and the conveying auxiliary roller 544. On the one hand, it can be suitable for pole pieces with different thicknesses, and on the other hand, when the pole piece does not need to be conveyed by the cutting conveying assembly 540, the distance between the conveying main roller 542 and the conveying auxiliary roller 544 can be adjusted to be greater than the thickness sum of the pole piece and the diaphragm.

[0064] For example, the rotation driving member 541 can be a component capable of generating torque such as a motor, and the gap driving member 543 can be a linear driving component such as a pneumatic cylinder, and the embodiment is not limited in this regard.

[0065] In order to avoid the deformation of the pole piece under the action of gravity between the cutting knife 530 and the second laminating mechanism 400, as shown in Figure 3 The first cutting mechanism 500 further comprises a support platform 560 connected to the cutting frame 510. In the conveying direction of the pole piece, the support platform 560 is located downstream of the cutting knife 530, and the support platform 560 is used to support the pole piece between the cutting knife 530 and the second laminating mechanism 400, so as to avoid the bending deformation of the pole piece under the action of gravity and ensure the laminating effect.

[0066] Exemplarily, the support platform 560 has a support surface 562 for supporting the pole piece, so that the pole piece can be supported by the support platform 560 between the cutting knife 530 and the second laminating mechanism 400.

[0067] Optionally, an end of the support platform 560 away from the cutting knife 530 is provided with a second arc-shaped avoiding groove 561 for avoiding the second laminating mechanism 400. As shown in Figure 7 The second laminating mechanism 400 comprises a first laminating roller 410 and a second laminating roller 420 arranged oppositely. The shape of the second arc-shaped avoiding groove 561 matches the shape of the first laminating roller 410, and part of the first laminating roller 410 is located in the second arc-shaped avoiding groove 561, but the highest point of the first laminating roller 410 is not covered by the support platform 560, so as not to affect the cooperation of the first laminating roller 410 and the second laminating roller 420 for clamping and conveying the pole piece.

[0068] Exemplarily, as shown in Figure 7 The second laminating mechanism 400 further comprises a laminating driving member 430 drivingly connected to the second laminating roller 420 and used to drive the second laminating roller 420 to move close to or away from the first laminating roller 410, so as to adjust the gap between the first laminating roller 410 and the second laminating roller 420.

[0069] In some optional embodiments, the support surface 562 of the support platform 560 for supporting the pole piece is tangent to the first laminating roller 410, so that the support surface 562 of the support platform 560 is coplanar with the part of the first laminating roller 410 for contacting the pole piece, and the support platform 560 can be as close as possible to the highest point of the first laminating roller 410 for contacting the pole piece, so as to realize the smooth transition between the support platform 560 and the first laminating roller 410, and the pole piece can be supported by the support platform 560 before being conveyed to contact the first laminating roller 410, thereby reducing the probability of the pole piece being wrinkled and improving the conveying effect of the pole piece.

[0070] Optionally, one side of the support surface 562 close to the cutting knife 530 is an arc surface, so as to avoid the cutting knife 530, and the cutting knife 530 can be smoothly lowered to the cutting position, avoiding the interference between the support platform 560 and the cutting knife 530.

[0071] In some optional embodiments, please continue to refer to Figure 3 The support surface 562 is provided with at least one groove 563. By providing the groove 563, the support surface 562 can have a small contact area and a small friction force with the pole piece on the basis of supporting the pole piece, thereby reducing the difficulty of the second composite mechanism 400 in pulling the pole piece. In the embodiment, a plurality of grooves 563 are provided, and the plurality of grooves 563 are arranged at intervals along the width direction of the support platform 560. Each groove 563 extends to the side of the support platform 560 close to the cutter 530.

[0072] As shown in Figures 5 to 7 , the first cutting mechanism 500 further comprises a bearing table 550. The bearing table 550 is connected to the cutting frame 510. In the conveying direction of the pole piece, the bearing table 550 is located upstream of the cutter 530. The bearing table 550 is used to support the pole piece between the cutting conveying assembly 540 and the cutter 530, so that the pole piece can be smoothly conveyed to the cutter 530 and will not be bent and deformed under the action of gravity.

[0073] In some optional embodiments, the end of the bearing table 550 away from the cutter 530 is provided with a first arc-shaped avoiding groove 551. Part of the conveying main roller 542 is located in the first arc-shaped avoiding groove 551, so that the bearing table 550 and the conveying main roller 542 can have an overlapping part, but the bearing table 550 will not cover the highest point of the conveying main roller 542, so as not to affect the cooperation of the conveying main roller 542 and the conveying auxiliary roller 544 in clamping the pole piece.

[0074] Optionally, the bearing surface 552 of the bearing table 550 for bearing the pole piece is tangent to the conveying main roller 542, so that the bearing surface 552 of the bearing table 550 is coplanar with the part of the conveying main roller 542 for contacting the pole piece. The bearing table 550 can be as close as possible to the highest point of the conveying main roller 542, so that the pole piece can be supported by the bearing table 550 in time after being separated from the conveying main roller 542, thereby realizing smooth transition between the bearing table 550 and the conveying main roller 542. The pole piece can be located in the same plane during conveying, thereby reducing the probability of wrinkles of the pole piece and improving the conveying effect of the pole piece.

[0075] As shown in Figure 1 , the composite winding device further comprises four installation shells 600. The four installation shells 600 correspond to the four gluing mechanisms one by one. Each gluing mechanism is arranged in the installation shell 600. The installation shell 600 has an inlet and an outlet for the diaphragm to pass through. The inlet and the outlet can be arranged on the opposite two walls of the installation shell 600, or can be arranged on the adjacent two walls of the installation shell 600. The embodiment does not limit this.

[0076] Optionally, each installation shell 600 is provided with a suction member (not shown in the figure) for adsorbing the gas containing glue molecules in the installation shell 600 to avoid the escape of the gas containing glue molecules. Exemplarily, the suction member includes but is not limited to activated carbon.

[0077] In the embodiment, the composite winding device further comprises a pole piece unwinding mechanism 800, a diaphragm unwinding mechanism 900 and a second cutting mechanism 1000. The pole piece unwinding mechanism 800 and the diaphragm unwinding mechanism 900 are both provided with two, one pole piece unwinding mechanism 800 is used for unwinding and conveying the positive pole piece 40, and the other pole piece unwinding mechanism 800 is used for unwinding and conveying the negative pole piece 30. One diaphragm unwinding mechanism 900 is used for unwinding and conveying the first diaphragm 10, and the other diaphragm unwinding mechanism 900 is used for unwinding and conveying the second diaphragm 20. The second cutting mechanism 1000 is arranged downstream of the fourth gluing mechanism 340 and upstream of the winding mechanism 200, and is used for cutting the two pole pieces and the two diaphragms after the diameter of the battery cell at the winding mechanism 200 reaches the requirement. Exemplarily, the pole piece unwinding mechanism 800 and the diaphragm unwinding mechanism 900 both comprise an unwinding part for unwinding and a conveying assembly for conveying, and the conveying assembly includes but is not limited to a conveying roller, a guide roller, a motor, etc. Further exemplarily, the second cutting mechanism 1000 can be a cutting device in the prior art, and the embodiment does not limit this.

[0078] In some optional embodiments, as shown in Figure 2 The composite winding device further comprises a support frame 700, and the first composite mechanism 100, the second composite mechanism 400, the first cutting mechanism 500, the installation shell 600, the pole piece unwinding mechanism 800, the diaphragm unwinding mechanism 900, the second cutting mechanism 1000 and the four gluing mechanisms are all mounted on the support frame 700. The setting positions of the first composite mechanism 100, the second composite mechanism 400, the first cutting mechanism 500, the installation shell 600, the pole piece unwinding mechanism 800, the diaphragm unwinding mechanism 900, the second cutting mechanism 1000 and the four gluing mechanisms on the support frame 700 can be designed according to actual needs.

[0079] In the embodiment, as shown in Figure 1 and Figure 2As shown, the support frame 700 comprises a first region 710, a second region 720 and a third region 730 arranged in sequence. Among them, the unwinding part of one of the two polar piece unwinding mechanisms 800, the unwinding part of one of the two diaphragm unwinding mechanisms 900 and the first gluing mechanism 310 are all arranged in the first region 710; the first composite mechanism 100, the two second composite mechanisms 400, the second gluing mechanism 320 and the fourth gluing mechanism 340 are all arranged in the second region 720; the unwinding part of the other of the two polar piece unwinding mechanisms 800, the unwinding part of the other of the two diaphragm unwinding mechanisms 900 and the third gluing mechanism 330 are all arranged in the third region 730. In this way, the space on the support frame 700 is fully utilized, and the conveying length of the polar piece can be optimized, and the overall stress of the support frame 700 is balanced.

[0080] In the embodiment, the gluing mechanism can be a spraying structure in the prior art, or a roll coating structure in the prior art, and the embodiment does not limit this.

[0081] Exemplarily, the embodiment provides a gluing mechanism with high coating uniformity. Figures 8 to 15 As shown, the gluing mechanism comprises a gluing roller 1, a support assembly 2, a glue scraping assembly 3 and a gluing driving part 4.

[0082] Among them, the outer circumferential surface of the gluing roller 1 is provided with at least one glue groove 11. In the embodiment, by providing the glue groove 11 on the gluing roller 1, the glue groove 11 can accommodate glue liquid, and in the process of contacting the diaphragm with the gluing roller 1, the glue liquid in the glue groove 11 can be attached to the diaphragm, so that the part of the diaphragm corresponding to the glue groove 11 can have more glue liquid, thereby increasing the amount of glue liquid between the diaphragm and the polar piece.

[0083] It should be noted that, in order to avoid waste of glue liquid, the part of the gluing roller 1 provided with the glue groove 11 is in contact with the diaphragm during gluing.

[0084] In the embodiment, the support assembly 2 is provided with a glue accommodating cavity 21, and the glue accommodating cavity 21 has an opening 211 facing the gluing roller 1. The glue accommodating cavity 21 is used to accommodate glue liquid, and the glue liquid in the glue accommodating cavity 21 can flow out through the opening 211 and be attached to the gluing roller 1. The glue scraping assembly 3 is arranged between the glue accommodating cavity 21 and the gluing roller 1, and the glue scraping assembly 3 is arranged away from the opening 211, so that the glue scraping assembly 3 does not affect the glue liquid flowing out from the opening 211 and being attached to the gluing roller 1. The glue scraping assembly 3 is used to scrape the glue liquid on the gluing roller 1, so that the glue liquid is uniformly distributed on the outer circumferential surface of the gluing roller 1.

[0085] The glue applying driving member 4 in the embodiment is connected to the glue applying roller 1 and is used to drive the glue applying roller 1 to rotate. During the rotation of the glue applying roller 1, the glue liquid adhered to the outer circumferential surface can be applied to the diaphragm, and at the same time, the glue liquid can be carried at the opening 211, so as to realize continuous glue applying.

[0086] Exemplarily, the glue applying driving member 4 includes but is not limited to a component such as a motor which can output torque. The output end of the glue applying driving member 4 can be directly connected to the glue applying roller 1, or the output end of the glue applying driving member 4 can also be connected to the glue applying roller 1 through a transmission assembly. The transmission assembly includes but is not limited to a driving gear, a driven gear and a transmission belt. The transmission belt is connected to the driving gear and the driven gear. The driving gear is coaxially connected to the output shaft of the glue applying driving member 4, and the driven gear is coaxially connected to the glue applying roller 1.

[0087] The glue applying mechanism provided by the embodiment can improve the amount of glue liquid carried by the glue applying roller 1, and in turn can improve the amount of glue liquid applied to the diaphragm by the glue applying roller 1, so as to prevent the problem of low bonding reliability of the diaphragm and the pole piece due to insufficient amount of glue liquid on the diaphragm, improve the bonding strength of the diaphragm and the pole piece, scrape the glue liquid on the glue applying roller 1 to make the glue liquid on the glue applying roller 1 more uniformly distributed, reduce the risk of empty glue area on the glue applying roller 1, improve the glue applying uniformity, make the diaphragm fully covered by the glue liquid, and in turn improve the bonding effect of the diaphragm and the pole piece. The glue scraping assembly 3 can scrape the excess glue liquid on the glue applying roller 1, prevent the problem of glue liquid dripping due to redundancy of glue liquid on the glue applying roller 1, avoid waste of glue liquid, and in turn reduce the glue applying cost.

[0088] Exemplarily, the glue groove 11 in the embodiment extends along the circumferential direction of the glue applying roller 1 to form a ring shape, so as to improve the amount of glue liquid in each region in the circumferential direction of the glue applying roller 1, and in turn ensure that the amount of glue liquid in each region in the length direction of the diaphragm is uniform, so as to ensure the bonding effect of the diaphragm and the pole piece. In addition, the ring-shaped glue groove 11 can also improve the amount of glue liquid.

[0089] In order to further improve the uniformity of the glue liquid on the diaphragm in the width direction of the diaphragm, optionally, as shown in Figure 10 a plurality of glue grooves 11 are provided. The plurality of glue grooves 11 are arranged in the axial direction of the glue applying roller 1. The axial direction of the glue applying roller 1 is the same as the width direction of the diaphragm. By arranging the plurality of glue grooves 11, the amount of glue liquid in each part of the glue applying roller 1 in the axial direction can be improved, so that the amount of glue liquid in each region of the diaphragm in the width direction is similar, the problem of uneven distribution of glue liquid on the diaphragm is avoided, and in turn the problem of uneven thickness of the diaphragm and the pole piece after bonding is prevented.

[0090] In some optional embodiments, the plurality of glue grooves 11 includes at least two glue grooves 11 with different widths, that is, the widths of the plurality of glue grooves 11 are not completely the same, and the positions of the glue grooves 11 with different widths can be selected according to actual needs, which are not limited in the embodiment. In this way, on the one hand, the number of glue grooves 11 can be reduced by setting glue grooves 11 with larger widths; on the other hand, glue grooves 11 with smaller widths can be set at the edge positions, and all glue grooves 11 do not need to be set wider, which has higher flexibility.

[0091] Exemplarily, the glue roller 1 includes a first glue roller area, a second glue roller area and a third glue roller area. The first glue roller area, the second glue roller area and the third glue roller area are sequentially arranged along the axis direction of the glue roller 1, and each of the first glue roller area, the second glue roller area and the third glue roller area is provided with at least one glue groove 11.

[0092] In some optional embodiments, as shown in Figure 8 , the first glue roller area and the third glue roller area are arranged close to the two ends of the glue roller 1, and the second glue roller area is arranged at the center in the axis direction of the glue roller 1. In some other optional embodiments, as shown in Figure 10 , the first glue roller area, the second glue roller area and the third glue roller area can be arranged close to one end of the glue roller 1, for coating glue on the separator with smaller width.

[0093] In the embodiment, the width direction of the glue groove 11 is the same as the axis direction of the glue roller 1. Please continue to refer to Figure 8 or Figure 10 , the width of the glue groove 11 of the second glue roller area is greater than the width of the glue groove 11 of the first glue roller area, and the width of the glue groove 11 of the second glue roller area is greater than the width of the glue groove 11 of the third glue roller area. In this way, the glue groove 11 for coating glue on the middle part of the separator in the width direction is wider, on the one hand, it can accommodate more glue, so as to ensure the amount of glue on the separator, on the other hand, it does not need to set more dense glue grooves 11, which is convenient for the formation of the glue groove 11 and the processing and manufacturing of the glue roller 1; and the glue groove 11 for coating glue on the edge of the separator in the width direction is narrow, so as to ensure that the edge of the separator has enough amount of glue, while avoiding the glue being pressed out of the separator in the rolling process, causing waste of glue.

[0094] Exemplarily, the width range of the glue groove 11 of the first glue roller area and the third glue roller area is 5.5mm-6.5mm. For example, the width of the glue groove 11 of the first glue roller area and the third glue roller area is 5.5mm, 5.8mm, 6mm, 6.3mm, 6.5mm, etc. The width range of the glue groove 11 of the second glue roller area is 12.5mm-14mm. For example, the width of the glue groove 11 of the second glue roller area is 12.5mm, 12.8mm, 13mm, 13.2mm, 13.5mm, 14mm, etc.

[0095] Exemplarily, the depth of the glue groove 11 ranges from 0.8 mm to 1.5 mm. The depth of the glue groove 11 should not be too large, otherwise a large amount of glue liquid will be carried at the opening 211, causing the glue liquid to drop and waste. The depth of the glue groove 11 should not be too small, otherwise the improvement effect of the glue-carrying amount of the glue roller 1 is not good. For example, the depth of the glue groove 11 is 0.8 mm, 0.9 mm, 1 mm, 1.2 mm, 1.5 mm, etc.

[0096] In order to further improve the glue-carrying amount of the glue roller 1, as shown in Figures 11 to 13 , the groove wall of the glue groove 11 is provided with a pit 12, and the pit 12 is used to accommodate the glue liquid. Since the pit 12 is arranged on the groove wall of the glue groove 11, the glue liquid in the pit 12 can be thrown out in the process of the rotation of the glue roller 1, and then attached to the diaphragm, so as to increase the amount of glue liquid. It should be noted that since the glue groove 11 is shallow, the pit 12 in the embodiment is arranged on the groove bottom of the glue groove 11.

[0097] The shape of the pit 12 will affect the efficiency of the glue liquid entering and flowing out of the pit 12. Optionally, the embodiment provides a pit 12, as shown in Figure 13 , the pit 12 is semispherical, and the diameter r of the pit 12 ranges from 0.1 mm to 0.3 mm. The diameter of the pit 12 should not be too large, otherwise a large amount of glue liquid will be stored, which will cause redundancy of the glue liquid on the diaphragm, and then cause waste of the glue liquid. The diameter of the pit 12 should not be too small, otherwise the manufacturing difficulty of the pit 12 will be increased. For example, the diameter of the pit 12 ranges from 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, etc.

[0098] Of course, it can be understood that the shape of the pit 12 is not limited to semispherical, but can also be square, cylindrical, etc., which is not limited in the embodiment.

[0099] It can be understood that the groove wall of each glue groove 11 is provided with a plurality of pits 12, so as to improve the glue-carrying amount of each glue groove 11.

[0100] Exemplarily, the groove wall of the glue groove 11 is provided with a plurality of pits 12, and the plurality of pits 12 are arranged in a plurality of rows in the axial direction of the glue roller 1, and each row includes a plurality of pits 12. The center distance of the two adjacent rows of pits 12 ranges from 1 mm to 1.5 mm. The center distance of the two adjacent rows of pits 12 is used to characterize the density of the pits 12 in the axial direction of the glue roller 1. It should be noted that the center distance of the two adjacent rows of pits 12 cannot be too large, and too large will lead to a decrease in the number of pit 12 rows, affecting the glue carrying capacity of the glue roller 1; the center distance of the two adjacent rows of pits 12 cannot be too small, and too small will increase the manufacturing difficulty of the pit 12 on the one hand, and on the other hand will lead to too much glue carrying capacity of the glue roller 1, causing waste of glue solution. For example, the center distance of the two adjacent rows of pits 12 is 1 mm, 1.1 mm, 1.2 mm, 1.4 mm, 1.5 mm, etc.

[0101] Optionally, as shown in Figure 12 , in the same row of pits 12, the central angle corresponding to the arc line between the two adjacent pits 12 in the circumferential direction of the glue roller 1 is R, wherein the value of R ranges from 6.5° to 8°. The central angle corresponding to the arc line between the two adjacent pits 12 in the circumferential direction of the glue roller 1 characterizes the density of the pits 12 in the circumferential direction of the glue roller 1. It should be noted that the central angle corresponding to the arc line between the two adjacent pits 12 in the circumferential direction of the glue roller 1 in the same row of pits 12 cannot be too large, and too large will lead to a decrease in the number of pits 12 in each row, affecting the glue carrying capacity of the glue roller 1; the central angle corresponding to the arc line between the two adjacent pits 12 in the circumferential direction of the glue roller 1 in the same row of pits 12 cannot be too small, and too small will increase the manufacturing difficulty of the pit 12 on the one hand, and on the other hand will lead to too much glue carrying capacity of the glue roller 1, causing waste of glue solution. For example, the value of R is 6.5°, 6.8°, 7°, 7.2°, 7.5°, 8°, etc.

[0102] Exemplarily, as shown in Figure 11 , 12 rows of pits 12 are arranged in the middle glue groove 11, the center distance of the two adjacent rows of pits 12 is 1.2 mm, and the value of R is 7.2°. Six rows of pits 12 are arranged in the two glue grooves 11 on both sides of the middle glue groove 11, the center distance of the two adjacent rows of pits 12 is 1.2 mm, and the value of R is 7.2°.

[0103] Optionally, the diameter of the glue roller 1 ranges from 45 mm to 55 mm, for example, the diameter of the glue roller 1 is 45 mm, 48 mm, 49.8 mm, 50.2 mm, 55 mm, etc.

[0104] The distance between the glue roller 1 and the opening 211 will affect the glue carrying capacity of the glue roller 1. Optionally, as shown in Figure 9 and Figure 10As shown, the glue applying mechanism further comprises a first driving member 5. The support assembly 2 comprises a support frame 22 and a glue container 23 arranged on the support frame 22. The glue container cavity 21 is arranged in the glue container 23, and the first driving member 5 is connected to the glue container 23 and used to drive the glue container 23 to move close to or away from the glue applying roller 1, so as to adjust the distance between the opening 211 and the glue applying roller 1. When the distance between the opening 211 and the glue applying roller 1 is large, the contact area of the glue applying roller 1 with the glue liquid at the opening 211 is small, so that the amount of glue carried by the glue applying roller 1 is reduced. When the distance between the opening 211 and the glue applying roller 1 is small, the contact area of the glue applying roller 1 with the glue liquid at the opening 211 is large, so that the amount of glue carried by the glue applying roller 1 is increased.

[0105] For example, the first driving member 5 is arranged on the support frame 22 and connected to the side of the glue container 23 away from the glue applying roller 1. The first driving member 5 includes but is not limited to a linear driving component such as a pneumatic cylinder.

[0106] In order to improve the flexibility of the glue applying roller 1, in some optional embodiments, as shown in Figure 9 and Figure 10 As shown, the glue applying roller 1, the glue scraping assembly 3 and the glue applying driving member 4 are arranged on the support assembly 2. Specifically, the glue applying roller 1, the glue scraping assembly 3 and the glue applying driving member 4 are arranged on the support frame 22. For example, the glue applying roller 1 can be rotatably arranged on the support frame 22, so as to improve the stability of the rotation of the glue applying roller 1.

[0107] As shown in Figure 10 The glue applying mechanism further comprises a second driving member 6 connected to the support assembly 2 and used to drive the support assembly 2 to move, so as to drive the glue applying roller 1 to move close to or away from the object to be coated (for example, the diaphragm), and adjust the distance between the glue applying roller 1 and the object to be coated. When the diaphragm does not need to be coated with glue, the glue applying roller 1 can be driven by the second driving member 6 to move away from the object to be coated, and the diaphragm continues to be conveyed, so as to form a glue-free area on the diaphragm.

[0108] For example, the second driving member 6 is arranged on the base 9. The second driving member 6 includes but is not limited to a linear driving component such as a pneumatic cylinder. In the present embodiment, the support frame 22 of the support assembly 2 can be slidably connected to the base 9 through a guide rail and sliding block structure, so as to ensure the moving direction and stability of the support assembly 2. For example, the second driving member 6 can be directly connected to the support assembly 2, or the second driving member 6 can also be connected to the support assembly 2 through a transmission assembly, which is not limited in the present embodiment.

[0109] Optionally, as shown in Figure 9 and Figure 14 The glue scraping assembly 3 comprises oppositely arranged first and second scraping plates 31 and 32, and the first and second scraping plates 31 and 32 are connected to the support assembly 2. The first and second scraping plates 31 and 32 are used to scrape the glue liquid on the glue applying roller 1.

[0110] In some optional embodiments, as shown in Figure 9 The first scraper 31 and the second scraper 32 can form the glue cavity 21 in cooperation with the support assembly 2, and the opening 211 of the glue cavity 21 is formed between the first scraper 31 and the second scraper 32.

[0111] In some other optional embodiments, the glue container 23 of the support assembly 2 forms the glue cavity 21 alone, and the gap between the first scraper 31 and the second scraper 32 is in communication with the opening 211 of the glue cavity 21, so that the glue solution overflowing from the opening 211 flows through the gap between the first scraper 31 and the second scraper 32 and then contacts and adheres to the glue roller 1.

[0112] In order to improve the glue scraping effect of the first scraper 31 and the second scraper 32, as shown in Figure 9 The lower end of the first scraper 31 and the upper end of the second scraper 32 are both inclined towards the glue roller 1 and have a pointed end. In this way, interference between the first scraper 31 and the second scraper 32 and the glue roller 1 is prevented, and the pointed end can guide the scraped glue solution, facilitating the recycling of the glue solution into the glue cavity 21.

[0113] When the glue solution on the glue roller 1 is excessive, it will drip under the action of gravity. Based on this, as shown in Figure 10 or Figure 14 The glue applying mechanism further includes a glue container 1a arranged below the glue roller 1 to collect the glue solution dripping from the glue roller 1 and the opening 211, facilitating the recycling and reuse of the glue solution.

[0114] In order to further improve the glue applying effect on the diaphragm, optionally, as shown in Figure 15 The glue applying mechanism further includes a first guide roller 7 and a second guide roller 8. The first guide roller 7 and the second guide roller 8 are both arranged to surround the object to be glued (such as a diaphragm or a structure obtained by combining two diaphragms and two pole pieces). The first guide roller 7 and the second guide roller 8 are arranged on opposite sides of the object to be glued, so that the object to be glued can be supported and guided by the first guide roller 7 and the second guide roller 8. The part of the object to be glued between the first guide roller 7 and the second guide roller 8 is tangent to the glue roller 1, so that the glue roller 1 can uniformly apply glue solution to the object to be glued, and the contact area between the glue roller 1 and the object to be glued remains consistent, which can ensure that the glue applying amount of each region of the object to be glued is consistent, further improving the uniformity of the glue solution amount of the object to be glued. Exemplarily, the part of the object to be glued between the first guide roller 7 and the second guide roller 8 extends in the vertical direction.

[0115] The use process of the composite winding device provided by the embodiment is that the two pole piece unwinding mechanisms 800 and the two diaphragm unwinding mechanisms 900 are simultaneously unwound. The first diaphragm 10 is transported to the first gluing mechanism 310, the first gluing mechanism 310 glues one surface of the first diaphragm 10, the negative pole piece 30 is transported to a first cutting mechanism 500, the cutting driving member 520 drives the cutting knife 530 to cut the negative pole piece 30, and the composite part and the remaining part of the negative pole piece 30 are obtained. The glued first diaphragm 10 and the composite part reach a second composite mechanism 400 at the same time, and the composite is achieved through the clamping of the first composite roller 410 and the second composite roller 420, so that the negative pole piece 30 is bonded to one surface of the first diaphragm 10.

[0116] At the same time, the second diaphragm 20 is transported to the third gluing mechanism 330, the third gluing mechanism 330 glues one surface of the second diaphragm 20, the positive pole piece 40 is transported to another first cutting mechanism 500, and the cutting driving member 520 drives the cutting knife 530 to cut the positive pole piece 40. Another second composite mechanism 400 bonds the positive pole piece 40 to one surface of the second diaphragm 20.

[0117] Next, the negative pole piece 30 and the first diaphragm 10 are transported to the second gluing mechanism 320, and the positive pole piece 40 and the second diaphragm 20 are transported to the first composite mechanism 100. The second gluing mechanism 320 glues the other surface of the first diaphragm 10, and then the glued first diaphragm 10 and the negative pole piece 30 are transported to the first composite mechanism 100. The first diaphragm 10, the negative pole piece 30, the positive pole piece 40 and the second diaphragm 20 are composited by the first composite mechanism 100, and the positive pole piece 40 is bonded to the other surface of the first diaphragm 10. In this process, the composite roller of the first composite mechanism 100 contacts the other surface of the second diaphragm 20 and the surface of the negative pole piece 30 away from the surface of the first diaphragm 10, and the other surface of the second diaphragm 20 and the surface of the negative pole piece 30 away from the surface of the first diaphragm 10 do not exist glue, which ensures the composite effect. After the completion of the composite by the first composite mechanism 100, the two diaphragms and the two pole pieces are transported to the fourth gluing mechanism 340, the fourth gluing mechanism 340 is used for gluing the other surface of the second diaphragm 20, and the glued structure is transported to the winding mechanism 200 to form a battery cell by the winding mechanism 200. The battery cell is bonded together by the glue layer on the other surface of the second diaphragm 20. It should be noted that after the completion of the gluing of the fourth gluing mechanism 340, the guide roller or the conveying roller of the conveying assembly does not contact the other surface of the second diaphragm 20, but contacts the surface of the negative pole piece 30 away from the surface of the first diaphragm 10, so as not to stick glue.

[0118] It should be noted that the above only the preferred embodiments of the present application and the use of technical principles. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, those skilled in the art can make various obvious changes, re-adjustment and replacement without departing from the scope of the present application. Therefore, although the above embodiments of the present application has been described in more detail, but the present application is not limited to the above examples, without departing from the concept of the present application, but also can include more other equivalent embodiments, and the scope of the present application is determined by the appended claims.

Claims

1. A composite winding device, characterized by, The application relates to a composite winding device for winding a plurality of polar pieces and a plurality of diaphragms. The composite winding device comprises four glue coating mechanisms, each of which is arranged corresponding to a surface of two diaphragms, and each of which is used for coating a glue layer on the corresponding surface; The composite winding device further comprises two first composite mechanisms (100) for compositing the polar pieces and the diaphragms, wherein the diaphragms and the polar pieces are arranged alternately and are bonded to each other through the glue layer. The composite winding device further comprises a winding mechanism (200) for winding the polar pieces and the diaphragms after the compositing.

2. The composite winding device according to claim 1, characterized in that The four glue coating mechanisms are a first glue coating mechanism (310), a second glue coating mechanism (320), a third glue coating mechanism (330) and a fourth glue coating mechanism (340). The first glue coating mechanism (310) and the second glue coating mechanism (320) are used for coating the glue layer on two surfaces of one of the diaphragms, and one of the two second composite mechanisms (400) is arranged downstream of the first glue coating mechanism (310) and upstream of the second glue coating mechanism (320) in the conveying direction of the polar pieces. The second glue coating mechanism (320) is arranged upstream of the first composite mechanism (100).

3. The composite winding device according to claim 2, characterized in that The third glue coating mechanism (330) and the fourth glue coating mechanism (340) are used for coating the glue layer on two surfaces of the other diaphragm, and the other of the two second composite mechanisms (400) is arranged downstream of the third glue coating mechanism (330) and upstream of the second glue coating mechanism (320) in the conveying direction of the polar pieces.

4. The composite winding device according to claim 2 or 3, characterized in that The fourth glue coating mechanism (340) is arranged downstream of the first composite mechanism (100) and upstream of the winding mechanism (200) in the conveying direction of the polar pieces.

5. The composite winding device according to claim 4, characterized in that The composite winding device further comprises two first cutting mechanisms (500) arranged upstream of the second composite mechanism (400) in the conveying direction of the polar pieces and used for cutting the polar pieces. The first cutting mechanism (500) comprises a cutting driving member (520), a cutting knife (530) and a cutting conveying assembly (540). The cutting driving member (520) drives the cutting knife (530) to cut the polar pieces into a composite part and a remaining part, and the cutting conveying assembly (540) is arranged upstream of the cutting knife (530) in the conveying direction of the polar pieces and is used for intermittently conveying the remaining part, and the second composite mechanism (400) is used for compositing the composite part and the diaphragm.

6. The composite winding device according to claim 5, characterized in that The cutting conveying assembly (540) comprises a rotating driving member (541), a conveying main roller (542), a gap driving member (543) and a conveying auxiliary roller (544), the rotating driving member (541) is used for driving the conveying main roller (542) to rotate, the conveying auxiliary roller (544) is used for conveying the pole piece together with the conveying main roller (542), and the gap driving member (543) is used for driving the conveying auxiliary roller (544) to move close to or away from the conveying main roller (542) so as to adjust the gap between the conveying main roller (542) and the conveying auxiliary roller (544).

7. The composite winding device according to claim 6, characterized in that The first cutting mechanism (500) further comprises a bearing table (550), which is located upstream of the cutting knife (530) in the conveying direction of the pole piece, and is used for supporting the pole piece between the cutting conveying assembly (540) and the cutting knife (530). One end of the bearing table (550) away from the cutting knife (530) is provided with a first arc-shaped avoiding groove (551), and part of the conveying main roller (542) is located in the first arc-shaped avoiding groove (551), and the bearing surface (552) of the bearing table (550) is tangent to the conveying main roller (542).

8. The composite winding device of claim 5, wherein, The first cutting mechanism (500) further comprises a support platform (560), which is located downstream of the cutting knife (530) in the conveying direction of the pole piece, and is used for supporting the pole piece between the cutting knife (530) and the second compounding mechanism (400). One end of the support platform (560) away from the cutting knife (530) is provided with a second arc-shaped avoiding groove (561), the second compounding mechanism (400) comprises a first compounding roller (410) and a second compounding roller (420) arranged oppositely, part of the first compounding roller (410) is located in the second arc-shaped avoiding groove (561), and the support surface (562) of the support platform (560) is tangent to the first compounding roller (410).

9. The composite winding device according to claim 8, characterized in that The support surface (562) is arc-shaped on the side close to the cutting knife (530), and / or the support surface (562) is provided with at least one groove (563).

10. The composite winding device according to any one of claims 1 to 3, characterized in that The compounding winding device further comprises four mounting shells (600), the gluing mechanism is arranged in the mounting shell (600) correspondingly, the mounting shell (600) has an inlet and an outlet for the diaphragm to pass through, and the mounting shell (600) is provided with a suction member.

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