WO2023045456A1

WO2023045456A1 - Method and device for processing electrode assembly

Info

Publication number: WO2023045456A1
Application number: PCT/CN2022/101133
Authority: WO
Inventors: 林文法; 杨道栓; 叶杰
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2021-09-23
Filing date: 2022-06-24
Publication date: 2023-03-30
Also published as: CN115911490A

Abstract

Disclosed in the present application are a method and device for processing an electrode assembly. The method for processing an electrode assembly comprises: supplying an electrode piece and a separator to a winding mechanism, wherein an included angle between the electrode piece and the separator and a horizontal line at a feeding side of the winding mechanism is an acute angle; and winding the electrode piece and the separator into an electrode assembly. In the embodiments of the present application, in the process of forming an electrode assembly, an electrode piece and a separator can be attached to each other and fed, so that the problems of a tab positional offset, the folding of an electrode piece head, the dislocation between a cathode piece and an anode piece, etc., in a winding process of the electrode piece are overcome; in addition, a smoothing plate and a blowing device in the related technology can be eliminated, thereby reducing redundant apparatuses and saving on the cost.

Description

Method and device for processing electrode assembly

cross reference

This application refers to the Chinese patent application No. 202111111576.1 entitled "Processing Method and Device for Electrode Assembly" submitted on September 23, 2021, which is fully incorporated by reference into this application.

technical field

The present application relates to the field of batteries, in particular to a method and device for processing an electrode assembly.

Background technique

With the development of electric vehicles, batteries have become the key to the sustainable development of the automotive industry. For electric vehicles, battery technology is an important factor in its development.

In some cases, during the cell winding production process of the battery, the pole piece will collide with the winding needle, which will cause the position of the pole piece to shift, the head of the pole piece to be folded, and the misalignment between the cathode and the anode And other issues.

Contents of the invention

In view of the above problems, this application provides a processing method and device for an electrode assembly, which can make the pole piece stick to the separator and feed, and overcome the position deviation of the pole piece and the discount of the pole piece head during the winding process of the pole piece. , The misalignment between the cathode sheet and the anode sheet, etc.

In the first aspect, the present application provides a method for processing an electrode assembly, including: feeding the pole piece and the separator to the winding mechanism, wherein the clamping between the pole piece and the separator and the horizontal line on the feeding side of the winding mechanism The angle is an acute angle; the pole piece and the separator are wound into an electrode assembly.

In the technical solution of the embodiment of the present application, since the angle between the pole piece and the separator and the horizontal line on the feeding side of the winding mechanism is an acute angle, the respective pole pieces and the separator can be formed in the process of forming the electrode assembly. Under the action of gravity, the pole piece can be fed against the separator, which overcomes the problems of the position deviation of the tab, the discount of the head of the pole piece, and the misalignment between the cathode piece and the anode piece during the winding process of the pole piece. The smoothing plate and air blowing device in the related art can be eliminated, redundant equipment can be reduced, and cost can be saved.

In some embodiments, the included angle between the isolation film and the horizontal line at the feeding side of the winding mechanism is between 90 degrees and -90 degrees. By setting the angle range between the separator and the horizontal line on the feeding side of the winding mechanism between 90 degrees and -90 degrees, the separator can let the pole piece under the gravity of the separator itself when feeding. Fit the isolation film into the material to avoid the head of the pole piece from being discounted.

In some embodiments, the included angle between the pole piece and the horizontal line at the feeding side of the winding mechanism is between 90 degrees and -90 degrees. By setting the angle range between the pole piece and the horizontal line on the feeding side of the winding mechanism between 90 degrees and -90 degrees, the pole piece can be moved under the gravity of the pole piece itself when feeding. Fit the isolation film into the material to avoid the head of the pole piece from being discounted.

In some embodiments, the angle between the pole piece and the horizontal line located on the feeding side of the winding mechanism is made an acute angle by adjusting the feeding position of the pole piece clamping mechanism so that the pole piece and the horizontal line located at the feeding side of the winding mechanism are adjusted. The angle between the horizontal line on the side is an acute angle; the pole piece clamping mechanism is used to clamp the pole piece and send the pole piece to the winding mechanism. By adjusting the feeding position of the pole piece clamping mechanism to provide a realization that "the angle between the pole piece and the horizontal line on the feeding side of the winding mechanism is an acute angle", it helps to improve the implementability of this solution, and According to actual needs, the angle between the pole piece and the horizontal line on the feeding side of the winding mechanism can be adjusted at any time by adjusting the feeding position of the pole piece clamping mechanism, so as to improve the universality of this solution.

In some embodiments, the angle between the separator and the horizontal line on the feed side of the winding mechanism is made an acute angle by adjusting the position of the separator clamping mechanism so that the separator and the horizontal line on the feed side of the winding mechanism are adjusted. The included angle of the horizontal line is an acute angle; the separator clamping mechanism is used to clamp the separator and send the separator to the winding mechanism. By adjusting the feeding position of the separator clamping mechanism to provide a realization that "the angle between the separator and the horizontal line on the feeding side of the winding mechanism is an acute angle", it is helpful to improve the implementability of this scheme, and According to actual needs, the angle between the separator and the horizontal line on the feeding side of the winding mechanism can be adjusted at any time by adjusting the feeding position of the separator clamping mechanism, so as to improve the universality of this solution.

In some embodiments, the angle between the pole piece and the horizontal line on the feeding side of the winding mechanism is made an acute angle by the following method: the pole piece is pulled to the feeding side of the winding mechanism by the first pulling assembly, and the first pulling The position of the assembly is such that the angle between the pole piece and the horizontal line on the feeding side of the winding mechanism is an acute angle. Using the traction effect of the first traction assembly to provide another realization that "the angle between the pole piece and the horizontal line on the feeding side of the winding mechanism is an acute angle" is helpful to improve the implementability of this solution.

In some embodiments, the angle between the isolation film and the horizontal line on the input side of the winding mechanism is made an acute angle by: pulling the isolation film to the input side of the winding mechanism through the second traction assembly, and adjusting the second traction Position the assembly so that the angle between the separator and the horizontal line on the feed side of the winding mechanism is an acute angle. Another way of realizing "the angle between the isolation film and the horizontal line on the feeding side of the winding mechanism is an acute angle" is provided through the traction of the second traction assembly, which helps to improve the feasibility of this solution.

In a second aspect, the present application provides a processing device for an electrode assembly, including: a pole piece clamping mechanism for feeding the pole piece to the winding mechanism, wherein the distance between the pole piece and the horizontal line on the feeding side of the winding mechanism The included angle is an acute angle; the separator clamping mechanism is used to make the included angle between the separator and the horizontal line on the feeding side of the winding mechanism an acute angle; the winding mechanism is used to wind the pole piece and the separator into an electrode assembly. Since the angle between the pole piece and the separator and the horizontal line on the feeding side of the winding mechanism is an acute angle, under the respective gravity of the pole piece and the separator, the pole piece can be fed against the separator, which overcomes the During the winding process of the pole piece, there are problems such as the position deviation of the tab, the discount of the head of the pole piece, and the misalignment between the cathode piece and the anode piece.

In some embodiments, the pole piece includes a cathode piece and an anode piece, the pole piece clamping mechanism includes a cathode piece clamping mechanism and an anode piece clamping mechanism, the separator includes a first separator and a second separator, and the separator clamps The mechanism includes a first separator clamping mechanism and a second separator clamping mechanism; a cathode sheet clamping mechanism for feeding the cathode sheet to the winding mechanism; an anode sheet clamping mechanism for feeding the anode sheet to the winding mechanism mechanism; the first isolation film clamping mechanism is used to feed the first isolation film to the winding mechanism; the second isolation film clamping mechanism is used to feed the second isolation film to the winding mechanism; wherein, the first isolation film Located between the cathode sheet and the anode sheet, the second isolation film and the first isolation film are respectively located on both sides of the anode sheet. The cathode sheet clamping mechanism and the anode sheet clamping mechanism can easily feed the cathode sheet and the anode sheet to the winding mechanism respectively, and the first separator clamping mechanism and the second separator clamping mechanism can conveniently feed the second separator respectively. A separator film and a second separator film are fed to a winding mechanism.

In some embodiments, the relative positions of the anode sheet clamping mechanism, the cathode sheet clamping mechanism, the first separator clamping mechanism and the second separator clamping mechanism and the winding mechanism are configured such that the anode sheet, cathode sheet , the angles between the first isolation film and the second isolation film and the horizontal line on the feeding side of the winding mechanism are acute angles. Through the anode sheet clamping mechanism, the cathode sheet clamping mechanism, the first separator clamping mechanism and the second separator clamping mechanism, the anode sheet, the cathode sheet, the first separator and the second separator can be easily connected with The included angle of the horizontal line on the feeding side of the winding mechanism is an acute angle.

In some embodiments, the processing device of the electrode assembly further includes: a third pulling assembly, used to pull the first separator to the feeding side of the winding mechanism; a fourth pulling assembly, used to pull the cathode sheet to the winding mechanism Feeding side; the fifth pulling assembly, used to pull the anode sheet to the feeding side of the winding mechanism; the sixth pulling assembly, used to pull the second separator to the feeding side of the winding mechanism; the third pulling assembly, the The positions of the four traction assemblies, the fifth traction assembly and the sixth traction assembly are configured so that the angles between the first separator, the cathode sheet, the anode sheet and the second separator and the horizontal line on the feeding side of the winding mechanism are acute angles . The third traction assembly, the fourth traction assembly, the fifth traction assembly and the sixth traction assembly can easily respectively draw the first separator, the cathode sheet, the anode sheet and the second separator to the feeding side of the winding mechanism, so that The included angles between the first isolation film, the cathode sheet, the anode sheet and the second isolation film and the horizontal line on the feeding side of the winding mechanism are acute angles.

In some embodiments, the electrode assembly processing device further includes: a cutting mechanism, configured to cut off the pole piece when the winding mechanism finishes winding the pole piece. The cutting mechanism can cut off the pole piece very conveniently.

In some embodiments, the electrode assembly processing device further includes: a guide rail, located upstream of the winding mechanism downstream of the pole piece clamping mechanism, for feeding the pole pieces to the winding mechanism. The guide rail can feed the pole pieces to the winding mechanism.

The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the contents 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 following specifically cites the specific implementation manner of the present application.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments of the present application. Obviously, the accompanying drawings described below are only some embodiments of the present application. Those of ordinary skill in the art can also obtain other drawings based on the accompanying drawings on the premise of not paying creative efforts. Also, the same reference numerals are used to denote the same components throughout the drawings.

Fig. 1 is a schematic diagram of the positional relationship of the pole piece, the separator, and the winding mechanism in the processing method of the electrode assembly in some embodiments of the present application;

Fig. 2 is a flow chart of a processing method for an electrode assembly provided by the present application;

FIG. 3 is a schematic structural diagram of a processing device for an electrode assembly according to some embodiments of the present application;

The reference numerals in the specific embodiment are as follows:

1-pole piece; 2-separator; 12-anode piece; 11-cathode piece; 21-first separator; 22-second separator; 3-winding mechanism; 4-cutting mechanism; R1-cathode 11 Angle with the horizontal line on the feeding side of the winding mechanism 3; R2-the angle between the first separator 21 and the horizontal line on the feeding side of the winding mechanism 3; R3-the anode sheet 12 and the winding mechanism 3 feeding The angle between the horizontal line on the side; the angle between R4-the second separator 22 and the horizontal line on the feeding side of the winding mechanism 3; 5-the cathode sheet clamping mechanism; 6-the anode sheet clamping mechanism; 7-the first isolation Membrane clamping mechanism; 8-second isolation membrane clamping mechanism; 9-third traction assembly; 10-fourth traction assembly; 011-fifth traction assembly; 012-sixth traction assembly.

Detailed ways

Embodiments of the technical solutions of the present application will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples, rather than limiting the protection scope of the present application.

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

In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and should not be understood as indicating or implying relative importance or implicitly indicating the number, specificity, or specificity of the indicated technical features. Sequence or primary-secondary relationship. In the description of the embodiments of the present application, "plurality" means two or more, unless otherwise specifically defined.

Reference herein to an "embodiment" means that a particular feature, mechanism, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences 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. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiment of the present application, the term "and/or" is only a kind of association relationship describing associated objects, which means that there may be three kinds of relationships, such as A and/or B, which may mean: A exists alone, and A exists at the same time and B, there are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to more than two groups (including two), and "multiple pieces" refers to More than two pieces (including two pieces).

In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical" "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "Radial", "Circumferential", etc. indicate the orientation or positional relationship based on the drawings Orientation or positional relationship is only for the convenience of describing the embodiment of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as an implementation of the present application. Example limitations.

In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a fixed connection. Disassembled connection, or integration; it can also be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

At present, judging from the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields . With the development of electric vehicles, military equipment and aerospace, batteries have become the key to the sustainable development of the automotive industry. For electric vehicles, military equipment and aerospace, etc., battery technology is an important factor related to its development.

The applicant noticed that during the winding production process of lithium-ion batteries, the pole piece may collide with the winding needle, which will lead to the position shift of the pole piece, the discount of the head of the pole piece, the misalignment between the cathode and the anode, etc. question.

In order to overcome the problems such as the offset of the tab position, the discount of the head of the pole piece, and the misalignment between the cathode piece and the anode piece during the winding process of the pole piece, the applicant found that it can be used after the pole piece is fed to the winding mechanism. In the process of winding to form the electrode assembly, an air blowing device is added. The blowing force is applied to the pole piece by the air blowing device to avoid the problem of the head of the pole piece being discounted. Although this method can solve the above problems to a certain extent, in the process of applying force to the pole piece by the air blowing device, the following situations will occur: the pole piece shifts and the pole piece flicks.

Based on the above considerations, in order to solve the problems such as the position deviation of the tabs, the discount of the head of the pole piece, and the misalignment between the cathode piece and the anode piece during the winding process of the pole piece, the applicant designed an electrode after in-depth research. The processing method and device of the component can make the pole piece stick to the separator and feed the material, which overcomes the position deviation of the pole piece, the discount of the head of the pole piece, and the misalignment between the cathode piece and the anode piece during the winding process of the pole piece. and other problems, and can also cancel the smoothing plate and blowing device in the related art, reduce redundant equipment, and save costs.

The electrode assemblies mentioned in this application can generally be used to make batteries. The battery may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, which is not limited in this embodiment of the present application.

According to some embodiments of the present application, refer to FIG. 1 , which is a schematic diagram of the positional relationship of the pole piece 1 , the separator 2 , and the winding mechanism 3 in the electrode assembly processing method according to some embodiments of the present application. Fig. 2 is a flow chart of a processing method for an electrode assembly provided by the present application, referring to Fig. 2, the method includes:

In step S101 , the pole piece 1 and the separator 2 are fed to the winding mechanism 3 . Wherein, the angle between the pole piece 1 and the separator 2 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle.

In step S102, the pole piece 1 and the separator 2 are wound into an electrode assembly.

In actual design, the pole piece 1 usually includes multiple anode pieces 12 and multiple cathode pieces 11 , and the separator 2 is also multiple pieces, and the separator 2 is at least used to isolate adjacent cathode pieces 11 and anode pieces 12 . In the forming process of the electrode assembly with a winding structure, the cathode sheet 11 moves to the winding mechanism 3 driven by the cathode sheet clamping mechanism, and the anode sheet 12 moves to the winding mechanism 3 under the drive of the anode sheet clamping mechanism. Moving, the separator 2 moves to the winding mechanism 3 under the drive of the separator clamping mechanism, so that the separator 2, the anode sheet 12 and the cathode sheet 11 form an electrode with a winding structure under the winding of the winding mechanism 3 components. In the process of forming the electrode assembly, since the angle between the pole piece 1 and the separator 2 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle, under the respective gravity of the pole piece 1 and the separator 2, it can be The pole piece 1 can be fed against the separator 2, which overcomes the position deviation of the tabs during the winding process of the pole piece 1, the discount of the head of the pole piece 1, the misalignment between the cathode piece 11 and the anode piece 12, etc. problem, and can also cancel the smoothing plate and air blowing device in the related art, reduce redundant equipment, and save cost.

It is worth noting that the winding mechanism 3 can generally be a winding needle. When the winding needle finishes winding the pole piece, the pole piece can be cut off by the cutting mechanism 4 . Wherein the cutting mechanism 4 may include two symmetrically arranged cutting knives. By controlling the gap between the two cutters, the cutter is controlled to cut off the pole piece 1 . For example, when the pole piece 1 does not need to be cut off, the two cutters are opened to form a gap for the pole piece 1 to pass through. When the pole piece 1 needs to be cut off, the two cutters are closed to cut off the pole piece 1 .

The pole piece 1 mentioned in this application may include a cathode piece 11 and an anode piece 12 ; wherein, the cathode piece 11 may be fed to the winding mechanism 3 by the cathode piece clamping mechanism. The anode sheet 12 can be fed to the winding mechanism 3 by the anode sheet clamping mechanism. The isolation film 2 mentioned in this application may include a first isolation film 21 and a second isolation film 22 . Wherein, the first isolation film 21 can be fed to the winding mechanism 3 by the first isolation film clamping mechanism. The second isolation film 22 can be fed to the winding mechanism 3 by the second isolation film clamping mechanism. The first isolation film 21 is located between the cathode sheet 11 and the anode sheet 12 , and the second isolation film 22 and the first isolation film 21 are respectively located on both sides of the anode sheet 12 . The embodiment of the present application does not limit this.

In the technical solution of the embodiment of the present application, since the angles between the pole piece 1 and the separator 2 and the horizontal line on the feeding side of the winding mechanism 3 are acute angles. That is, the angle R1 between the cathode sheet 11 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle, the angle R2 between the first separator 21 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle, and the anode sheet 12 and the horizontal line on the feeding side of the winding mechanism 3 are acute angles. The included angle R3 between the horizontal line on the feeding side of the winding mechanism 3 is an acute angle, and the included angle R4 between the second isolation film 22 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle. Therefore, under the respective gravitational effects of the pole piece 1 and the separator 2, the pole piece 1 can be fed against the separator 2, which overcomes the position deviation of the tabs and the pole piece during the winding process of the pole piece 1. 1 Head discount, misalignment between the cathode sheet 11 and the anode sheet 12, etc., and the smoothing plate and air blowing device in the related art can be eliminated, redundant equipment can be reduced, and cost can be saved.

According to some embodiments of the present application, in some embodiments, as shown in FIG. 1 , the included angle range between the isolation film 2 and the horizontal line at the feeding side of the winding mechanism 3 is between 90 degrees and -90 degrees.

In some embodiments, the included angle range between the pole piece 1 and the horizontal line at the feeding side of the winding mechanism 3 is between 90 degrees and −90 degrees.

By setting the angle range between the separator 2 and the horizontal line on the feeding side of the winding mechanism 3 between 90 degrees and -90 degrees, the angle range between the pole piece 1 and the horizontal line on the feeding side of the winding mechanism 3 Set between 90 degrees and -90 degrees, so that when the separator 2 and the pole piece 1 are fed, the pole piece 1 can be attached to the separator 2 under the action of gravity of the pole piece 1 and the separator 2. , to avoid the phenomenon that the head of the pole piece 1 is discounted. In the above embodiments, the included angle ranging from 0° to 90° means that the pole piece 1 or the separator 2 is located above the horizontal line on the feeding side of the winding mechanism 3 . For example, take Fig. 1 as an example: the cathode sheet 11 is located above the horizontal line on the feeding side of the winding mechanism 3, and the included angle R1 with the horizontal line on the feeding side of the winding mechanism 3, and the angle range of R1 is from 0 degrees to 90 degrees. degrees; the first isolation film 21 is located above the horizontal line on the feeding side of the winding mechanism 3, and the angle R2 between the horizontal line on the feeding side of the winding mechanism 3, and the angle range of R2 is from 0 to 90 degrees. The included angle ranging from 0° to -90° means that the pole piece 1 or the separator 2 is located below the horizontal line on the feeding side of the winding mechanism 3 . For example, take Figure 1 as an example: the anode piece 12 is located below the horizontal line on the feeding side of the winding mechanism 3, and the angle R3 between the horizontal line on the feeding side of the winding mechanism 3, and the angle R3 ranges from 0 degrees to - 90 degrees; the second isolation film 22 is located below the horizontal line on the feeding side of the winding mechanism 3, and the included angle R4 with the horizontal line on the feeding side of the winding mechanism 3, and the included angle of R4 ranges from 0 degrees to -90 degrees.

According to some embodiments of the present application, in some embodiments, the angle between the pole piece 1 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle by adjusting the feeding position of the pole piece clamping mechanism to The angle between the pole piece 1 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle; the pole piece clamping mechanism is used to clamp the pole piece 1 and send the pole piece 1 to the winding mechanism 3 .

Exemplarily, take the direction shown in FIG. 1 as an example: the angle between the pole piece 1 and the horizontal line on the feeding side of the winding mechanism 3 can be adjusted to be an acute angle by moving the pole piece clamping mechanism up and down.

By adjusting the feeding position of the pole piece clamping mechanism, a realization method of "the angle between the pole piece 1 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle" is provided, which helps to improve the practicability of this scheme , and according to actual needs, the angle between the pole piece 1 and the horizontal line on the feeding side of the winding mechanism 3 can be adjusted at any time by adjusting the feeding position of the pole piece clamping mechanism, so as to improve the universality of this solution.

According to some embodiments of the present application, in some embodiments, the angle between the separator 2 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle by adjusting the position of the separator clamping mechanism so that the separator The angle between the film 2 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle;

In one embodiment of the present application, the direction shown in Fig. 1 is taken as an example for illustration: the isolation film 2 and the horizontal line on the feeding side of the winding mechanism 3 can be adjusted by moving the isolation film clamping mechanism up and down. The included angle is an acute angle.

By adjusting the feeding position of the separator clamping mechanism to provide a realization of "the angle between the separator 2 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle", it helps to improve the implementability of this scheme , and according to actual needs, the angle between the separator 2 and the horizontal line on the feeding side of the winding mechanism 3 can be adjusted at any time by adjusting the feeding position of the separator clamping mechanism, so as to improve the universality of this solution.

According to some embodiments of the present application, in some embodiments, the angle between the pole piece 1 and the horizontal line on the feeding side of the winding mechanism 3 is made an acute angle in the following manner: the pole piece 1 is pulled to the coil by the first pulling assembly winding mechanism 3 feed side, and adjust the position of the first traction assembly, so that the angle between the pole piece 1 and the horizontal line on the feed side of winding mechanism 3 is an acute angle.

It should be noted that the first traction assembly may, but is not limited to, include rollers. For example, if the angle between the current pole piece 1 and the horizontal line on the feeding side of the winding mechanism 3 is not an acute angle, the pole piece 1 can be drawn by passing the roller, so that the pole piece 1 can be drawn to the feeding side of the winding mechanism 3, and can be The direction shown in the figure is used as an example to adjust the position of the roller up and down or left and right, so that the angle between the pole piece 1 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle.

Through the traction of the first traction assembly, that is, the traction of the passing roller, another realization method of "the angle between the pole piece 1 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle" is provided, which helps to improve the implementation of this scheme. sex.

According to some embodiments of the present application, in some embodiments, the angle between the isolation film 2 and the horizontal line located on the feeding side of the winding mechanism 3 is an acute angle in the following manner: the isolation film 2 is pulled to the roll by the second pulling assembly winding mechanism 3 feed side, and adjust the position of the second traction assembly so that the angle between the isolation film 2 and the horizontal line located on the feed side of the winding mechanism 3 is an acute angle.

It is worth noting that the second traction assembly may include, but is not limited to, passing rollers. For example, if the angle between the current separator 2 and the horizontal line on the feeding side of the winding mechanism 3 is not an acute angle, the separator 2 may be pulled by passing rollers, Pull the separator 2 to the feeding side of the winding mechanism 3, and adjust the position of the roller up and down or left and right by taking the direction shown in the figure as an example, so that the sandwich between the separator 2 and the horizontal line on the feeding side of the winding mechanism 3 The angle is acute.

Through the traction of the second traction assembly, that is, the traction of the passing roller, another realization method of "the angle between the isolation film 2 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle" is provided, which helps to improve the implementation of this scheme. sex.

According to some embodiments of the present application, description will be made with reference to FIG. 1 . The present application also provides a processing device for an electrode assembly, including: a pole piece clamping mechanism, used to feed the pole piece 1 to the winding mechanism 3, wherein the pole piece 1 and the pole piece located on the feeding side of the winding mechanism 3 The angle between the horizontal lines is an acute angle. The separator clamping mechanism is used to form an acute angle between the separator 2 and the horizontal line on the feeding side of the winding mechanism 3; the winding mechanism 3 is used to wind the pole piece 1 and the separator 2 into an electrode assembly.

In this embodiment, since the angle between the pole piece 1 and the separator 2 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle, under the respective gravity of the pole piece 1 and the separator 2, the pole piece 1 and the separator 2 can make the pole piece 1 can be fed against the isolation film 2, which overcomes the problems of the position deviation of the tabs during the winding process of the pole piece 1, the discount of the head of the pole piece 1, the misalignment between the cathode piece 11 and the anode piece 12, etc., and It can also cancel the smoothing plate and air blowing device in the related art, reduce redundant equipment and save cost.

According to some embodiments of the present application, in some embodiments, as shown in FIG. 3 , FIG. 3 is a schematic structural diagram of an electrode assembly processing device according to some embodiments of the present application. The pole piece 1 includes a cathode piece 11 and an anode piece 12, and the pole piece clamping mechanism includes a cathode piece clamping mechanism 5 and an anode piece clamping mechanism 6, and the separator 2 includes a first separator 21 and a second separator 22, and the separator The clamping mechanism includes a first isolation membrane clamping mechanism 7 and a second isolation membrane clamping mechanism 8 . The cathode sheet clamping mechanism 5 is used to feed the cathode sheet 11 to the winding mechanism 3 . The anode sheet clamping mechanism 6 is used to feed the anode sheet 12 to the winding mechanism 3 . The first isolation film clamping mechanism 7 is used to feed the first isolation film 21 to the winding mechanism 3 . The second isolation film clamping mechanism 8 is used to feed the second isolation film 22 to the winding mechanism 3 . Wherein, the first isolation film 21 is located between the cathode sheet 11 and the anode sheet 12 , and the second isolation film 22 and the first isolation film 21 are respectively located on both sides of the anode sheet 12 .

In this embodiment, the electrode assembly formed by the electrode assembly processing device includes a cathode sheet 11 , an anode sheet 12 , a first separator 21 and a second separator 22 . And the positional relationship of the cathode sheet 11, the anode sheet 12, the first separator 21 and the second separator 22 is sequentially the cathode sheet 11, the first separator 21, the anode sheet 12 and the second separator 22, through this positional relationship , it is possible to separate the adjacent cathode sheets 11 and anode sheets 12 by the first separator 21 during the winding process of the winding mechanism 3 to form the electrode assembly, and separate the adjacent cathode sheets 11 and anode sheets 12 by the second separator 22. Anode sheet 12. In some embodiments, the included angles between the cathode sheet 11 , the anode sheet 12 , the first separator 21 and the second separator 22 and the horizontal line at the feeding side of the winding mechanism 3 are acute angles. That is, the angle R1 between the cathode sheet 11 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle, the angle R2 between the first separator 21 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle, and the anode sheet 12 and the horizontal line on the feeding side of the winding mechanism 3 are acute angles. The included angle R3 between the horizontal line on the feeding side of the winding mechanism 3 is an acute angle, and the included angle R4 between the second isolation film 22 and the horizontal line on the feeding side of the winding mechanism 3 is an acute angle. Therefore, under the respective gravitational effects of the cathode sheet 11, the anode sheet 12, the first separator 21, and the second separator 22, the cathode sheet 11 and the anode sheet 12 can be attached to the adjacent first separator 21, respectively, respectively. The second separator 22 is fed, which overcomes the problems of tab position offset between the cathode sheet 11 and the anode sheet 12 during the winding process, the head of the electrode sheet 1 is discounted, and the misalignment between the cathode sheet 11 and the anode sheet 12, etc. , and can also cancel the smoothing plate and air blowing device in the related art, reduce redundant equipment, and save cost.

According to some embodiments of the present application, in some embodiments, as shown in FIG. 8 and the winding mechanism 3 are arranged so that the angles between the anode sheet 12, the cathode sheet 11, the first separator 21 and the second separator 22 and the horizontal line on the feeding side of the winding mechanism 3 are acute angles .

According to some embodiments of the present application, in some embodiments, as shown in FIG. 3 , the electrode assembly processing device further includes: a third pulling assembly 9, which is used to pull the first separator 21 to the winding mechanism 3 for feeding Side; the fourth pulling assembly 10, used to pull the cathode sheet 11 to the feeding side of the winding mechanism 3; the fifth pulling assembly 011, used to pull the anode sheet to the feeding side of the winding mechanism 3; the sixth pulling assembly 012 , for pulling the second isolation film 22 to the feed side of the winding mechanism 3; the positions of the third pulling assembly 9, the fourth pulling assembly 10, the fifth pulling assembly 011 and the sixth pulling assembly 012 are configured so that the first The included angles between the separator 21 , the cathode sheet 11 , the anode sheet 12 and the second separator 22 and the horizontal line at the feeding side of the winding mechanism 3 are acute angles.

Exemplarily, the third pulling assembly 9 is used to pull the first isolation film 21 to the feeding side of the winding mechanism 3, and adjust the position of the third pulling assembly 9 so that the first isolation film 21 is located in the winding mechanism. 3 The angle between the horizontal line on the feeding side is an acute angle. Wherein, the third traction assembly 9 may, but is not limited to, include rollers. The fourth pulling assembly 10 is used to pull the cathode sheet 11 to the feeding side of the winding mechanism 3, and adjust the position of the fourth pulling assembly 10 so that the clamping of the cathode sheet 11 and the horizontal line on the feeding side of the winding mechanism 3 The angle is acute. Wherein, the fourth traction assembly 10 may but is not limited to include rollers. The fifth pulling assembly 011 is used to pull the anode sheet to the feeding side of the winding mechanism 3, and adjust the position of the fifth pulling assembly 011 so that the angle between the anode sheet and the horizontal line on the feeding side of the winding mechanism 3 is acute angle. Wherein, the fifth traction assembly 011 may, but is not limited to, include passing rollers. The sixth traction assembly 012 is used to draw the second isolation film 22 to the feed side of the winding mechanism 3, and adjust the position of the sixth traction assembly 012 so that the second isolation film 22 is located on the feed side of the winding mechanism 3 The angle between the horizontal lines is an acute angle. Wherein, the sixth traction assembly 012 may, but is not limited to, include passing rollers.

It should be noted that, taking the direction shown in FIG. 3 as an example, the following description is made: the anode sheet 12, the cathode sheet 11, the first separator 21 and the second separator 22 are respectively located at the ends of the winding mechanism 3 when feeding. The left side, that is, the left side of the winding mechanism 3 is the feeding side. In the actual winding process of the electrode assembly, the anode sheet 12, the cathode sheet 11, the first separator 21 and the second separator 22 can also be respectively positioned on the right side of the winding mechanism 3 when feeding. This is not limited.

According to some embodiments of the present application, in some embodiments, the electrode assembly processing device further includes: a cutting mechanism 4 for cutting off the pole piece 1 when the winding mechanism 3 finishes winding the pole piece 1 .

In some embodiments, in an actual design process, the cutting mechanism 4 may include two symmetrically arranged cutting knives. By controlling the gap between the two cutters, the cutter is controlled to cut off the pole piece 1 . For example, when the pole piece 1 does not need to be cut off, the two cutters are opened to form a gap for the pole piece 1 to pass through. When the pole piece 1 needs to be cut off, the two cutters are closed to cut off the pole piece 1 .

According to some embodiments of the present application, in some embodiments, the processing device of the electrode assembly further includes: a guide rail, located upstream of the winding mechanism 3 downstream of the pole piece clamping mechanism, for feeding the pole piece 1 to the winding mechanism 3.

In some embodiments, the processing device of the electrode assembly may also include a guide mechanism, which is used to limit the position of the pole piece 1 when the pole piece clamping mechanism clamps the pole piece 1 and moves toward the winding mechanism 3, so as to avoid the pole piece 1 deviation. Under the guidance of the guide mechanism, the pole piece 1 is transported to the guide rail by the pole piece clamping mechanism, and the pole piece 1 is fed to the winding mechanism 3 through the guide rail.

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

Claims

A method for processing an electrode assembly, comprising:

Feeding the pole piece and the separator to the winding mechanism, wherein the angle between the pole piece and the separator and the horizontal line on the feeding side of the winding mechanism is an acute angle;

Winding the pole piece and the separator to form an electrode assembly.
The method for processing an electrode assembly according to claim 1, wherein an included angle between the separator and a horizontal line at the feeding side of the winding mechanism is between 90 degrees and -90 degrees.
The method for processing an electrode assembly according to claim 1 or 2, wherein the range of the included angle between the pole piece and the horizontal line on the feeding side of the winding mechanism is between 90 degrees and -90 degrees.
The method for processing an electrode assembly according to any one of claims 1 to 3, wherein,

Make the angle between the pole piece and the horizontal line on the feeding side of the winding mechanism an acute angle by the following method:

Adjust the feeding position of the pole piece clamping mechanism so that the angle between the pole piece and the horizontal line on the feeding side of the winding mechanism is an acute angle;

The pole piece clamping mechanism is used to clamp the pole piece and send the pole piece to the winding mechanism.
The method for processing an electrode assembly according to any one of claims 1 to 4, wherein,

Make the angle between the separator and the horizontal line on the feed side of the winding mechanism an acute angle by:

Adjusting the position of the isolation film clamping mechanism so that the angle between the isolation film and the horizontal line on the feeding side of the winding mechanism is an acute angle;

The isolation film clamping mechanism is used for clamping the isolation film and sending the isolation film to the winding mechanism.
The method for processing an electrode assembly according to any one of claims 1 to 3 and 5, wherein,

Make the angle between the pole piece and the horizontal line on the feeding side of the winding mechanism an acute angle by the following method:

The pole piece is pulled to the feeding side of the winding mechanism by the first pulling assembly, and the position of the first pulling assembly is adjusted so that the pole piece is in line with the horizontal line on the feeding side of the winding mechanism The included angle is an acute angle.
The method for processing an electrode assembly according to any one of claims 1 to 4 and 6, wherein,

Make the angle between the separator and the horizontal line on the feed side of the winding mechanism an acute angle by:

The separator is pulled to the feeding side of the winding mechanism by the second pulling assembly, and the position of the second pulling assembly is adjusted so that the separator is in line with the horizontal line on the feeding side of the winding mechanism. The included angle is an acute angle.
A processing device for an electrode assembly, including:

The pole piece clamping mechanism is used to feed the pole piece to the winding mechanism, wherein the angle between the pole piece and the horizontal line on the feeding side of the winding mechanism is an acute angle;

The isolation film clamping mechanism is used to make the angle between the isolation film and the horizontal line on the feeding side of the winding mechanism an acute angle;

The winding mechanism is used to wind the pole piece and the separator into an electrode assembly.
The processing device for an electrode assembly according to claim 8, wherein the included angle between the separator and the horizontal line at the feeding side of the winding mechanism is between 90 degrees and -90 degrees.
The electrode assembly processing device according to claim 8 or 9, wherein the included angle between the pole piece and the horizontal line on the feeding side of the winding mechanism is between 90 degrees and -90 degrees.
The electrode assembly processing device according to any one of claims 8 to 10, wherein,

The pole piece includes a cathode piece and an anode piece, the pole piece clamping mechanism includes a cathode piece clamping mechanism and an anode piece clamping mechanism, and the separator includes a first separator and a second separator, and the separator The clamping mechanism includes a first isolation membrane clamping mechanism and a second isolation membrane clamping mechanism;

The cathode sheet clamping mechanism is used to feed the cathode sheet to the winding mechanism;

The anode sheet clamping mechanism is used to feed the anode sheet to the winding mechanism;

The first isolation film clamping mechanism is used to feed the first isolation film to the winding mechanism;

The second isolation film clamping mechanism is used to feed the second isolation film to the winding mechanism;

Wherein, the first isolation film is located between the cathode sheet and the anode sheet, and the second isolation film and the first isolation film are respectively located on both sides of the anode sheet.
The processing device of an electrode assembly according to claim 11, wherein,

The relative positions of the anode slice clamping mechanism, the cathode slice clamping mechanism, the first separator clamping mechanism and the second separator clamping mechanism and the winding mechanism are configured such that the The included angles between the anode sheet, the cathode sheet, the first separator and the second separator and the horizontal line at the feeding side of the winding mechanism are acute angles.
The processing device for an electrode assembly according to claim 11 or 12, wherein,

The processing device of the electrode assembly also includes:

a third pulling assembly, used to pull the first separator to the feeding side of the winding mechanism;

The fourth pulling assembly is used to pull the cathode sheet to the feeding side of the winding mechanism.

The fifth pulling assembly is used to pull the anode sheet to the feeding side of the winding mechanism;

a sixth pulling assembly, used to pull the second separator to the feeding side of the winding mechanism;

The positions of the third pulling assembly, the fourth pulling assembly, the fifth pulling assembly and the sixth pulling assembly are configured such that the first separator, the cathode sheet, the anode sheet and the second separator The included angles with the horizontal line on the feeding side of the winding mechanism are acute angles.
The electrode assembly processing device according to any one of claims 8 to 13, wherein the electrode assembly processing device further comprises:

The cutting mechanism is used to cut off the pole piece when the winding mechanism finishes winding the pole piece.
The electrode assembly processing device according to any one of claims 8 to 14, wherein the electrode assembly processing device further comprises:

The guide rail, located downstream of the pole piece clamping mechanism and upstream of the winding mechanism, is used to feed the pole pieces to the winding mechanism.