WO2025097896A1 - Production device and production system - Google Patents

Abstract

A production device (100) and a production system (1000). The production device (100) comprises a pressing device (10), a conveying device (20), a first limiting device (30), and a second limiting device (40). The pressing device (10) is used for pressing a first sheet component (201) and a second sheet component (202) so that the first sheet component (201) and the second sheet component (202) are stacked; the conveying device (20) is used for conveying the first sheet component to the pressing device (10); the first limiting device (30) is arranged between the pressing device (10) and the conveying device (20), and the first limiting device (30) is used for limiting the position of the end of the first sheet component (201); and the second limiting device (40) is arranged on the side of the conveying device (20) facing away from the first limiting device (30), and the second limiting device (40) is used for limiting the position of the first sheet component (201) on one side of the conveying device (20).

Description

Production equipment and production systems

Priority information

This application claims priority and benefits of patent application No. 202311498575.6 filed with the State Intellectual Property Office of China on November 10, 2023, and the entire text of which is incorporated herein by reference.

Technical Field

The present application relates to the field of battery manufacturing technology, and in particular to a production device and a production system.

Background Art

The electrode assembly of a battery cell generally includes an electrode sheet and a separator, which are stacked and wound. During the manufacturing process of the electrode assembly, the electrode sheet and the separator can be stacked together first and then wound. However, during the process of stacking the electrode sheet and the separator, the end of the electrode sheet is prone to bending.

Summary of the invention

The present invention provides a production device and a production system, which can solve the problem that the end of the electrode sheet is easily bent in the lamination process of the electrode sheet and the diaphragm.

The production equipment of the embodiment of the present invention comprises a pressing device, a conveying device, a first limiting device and a second limiting device.

The pressing device is used to press the first sheet component and the second sheet component to stack the first sheet component and the second sheet component; the conveying device is used to convey the first sheet component to the pressing device; the first limiting device is arranged between the pressing device and the conveying device, and the first limiting device is used to limit the position of the end of the first sheet component; the second limiting device is arranged on the side of the conveying device away from the first limiting device, and the second limiting device is used to limit the position of the first sheet component on one side of the conveying device.

The production equipment of the embodiment of the present application limits the position of the end of the first sheet component by a first limiting device, and limits the displacement of the end of the first sheet component relative to the second sheet component during the pressing and stacking process of the first sheet component and the second sheet component, thereby solving the problem of undesirable phenomena such as bending of the electrode sheet end during the process of stacking the electrode sheet and the diaphragm.

In some embodiments, the laminating device comprises a laminating roller set, wherein the laminating roller set comprises two opposing laminating rollers, and the two laminating rollers are used to laminarly transfer the first sheet member and the second sheet member.

Thus, the first sheet component and the second sheet component pass between two opposite laminating rollers, and the laminating roller group enables the first sheet component and the second sheet component to fit tightly together, and the laminating roller group can laminarly and convey the first sheet component and the second sheet component at the same time, thereby improving production efficiency.

In some embodiments, the conveying device includes a conveying belt, the conveying belt is formed with first suction holes, and the first suction holes can form negative pressure to suck the first sheet member.

In this way, the conveyor belt can adsorb the first sheet component to a fixed position on the conveyor belt when conveying the first sheet component, thereby reducing the slippage or misalignment of the first sheet component during movement, thereby reducing wrinkles and other defects caused by misalignment.

In some embodiments, the first limiting device includes a limiting plate, the limiting plate is formed with a second adsorption hole, and the second adsorption hole can form a negative pressure to adsorb the first sheet component.

In this way, the limiting plate can absorb the first sheet component by forming negative pressure through the second adsorption hole, so that the first sheet component is in a position where it can be accurately attached to the second sheet component during the production process. In addition, by adsorbing the first sheet component with negative pressure, the adsorption force is easy to control, which is conducive to the transmission of the first sheet component. The limiting plate is located between the pressing device and the transmission device, and can limit the displacement of the end of the first sheet component, thereby reducing the probability of bending of the end of the first sheet component.

In some embodiments, the second suction hole is used to communicate with the atmosphere when the head of the first sheet member is supported; and to form negative pressure when the portion other than the head of the first sheet member is supported.

In this way, when the head of the first component is at the second adsorption hole, it is not easy to hinder the head of the first sheet component from passing through the lamination roller group, and when the head of the first sheet component enters the lamination roller group, the second adsorption hole forms a negative pressure, adsorbs the part of the first sheet component except the head, and limits the first sheet component to be in the correct position during the lamination process.

In some embodiments, the second limiting device includes an insert feeding mechanism, which can absorb the first sheet component by means of negative pressure to limit the first sheet component.

In this way, the insert sheet feeding mechanism can continuously and stably transport the first sheet component. The insert sheet feeding mechanism absorbs the first sheet component, so that the first sheet component remains flat during the movement and reduces the dislocation or slippage of the first sheet component during the movement.

In some embodiments, the second limiting device includes a cutting mechanism connected to the insert feeding mechanism, and the cutting mechanism is located at the discharge side of the insert feeding mechanism.

Thus, the cutting mechanism can cut the first sheet component into different sizes during the movement of the first sheet component, thereby improving production efficiency. In addition, after the cutting mechanism cuts off the first sheet component, the inserting sheet feeding mechanism can still absorb the first sheet component to limit the swing of the head of the first sheet component.

In some embodiments, the production equipment includes a deviation-correcting device disposed between the conveying device and the second limiting device, and the deviation-correcting device is used to correct the relative position of the first sheet component and the second sheet component.

In this way, the deviation correcting device can shift the first sheet component along the width direction of the first sheet component when the first sheet component is misaligned, thereby correcting the misalignment so that the first sheet component and the second sheet component face each other in the width direction.

The production system of the embodiment of the present application includes the production equipment of any of the above-mentioned embodiments.

In this way, the production system of the embodiment of the present application limits the first sheet component through the conveying device, the first limiting device and the second limiting device, so as to reduce the displacement of the first sheet component relative to the second sheet component during the process of pressing and stacking the first sheet component and the second sheet component in the production equipment, and reduce the probability of undesirable phenomena such as bending.

In some embodiments, the number of production devices is two and they are respectively a first device and a second device, the first device and the second device are arranged in parallel, in the first device, the first sheet component is a first pole piece, the second sheet component is a diaphragm, and the first device is used to press the first pole piece and the diaphragm to form a layer assembly; in the second device, one of the first sheet component and the second sheet component is a second pole piece, and the other is a layer assembly, and the second device is used to press the second pole piece and the layer assembly to form an electrode assembly.

In this way, a layer assembly consisting of a first electrode sheet and a diaphragm can be made by the first device, and the first electrode sheet, the diaphragm and the second electrode sheet can be stacked and pressed by the second device, so that the first electrode sheet, the diaphragm and the second electrode sheet are tightly fitted in sequence, thereby improving the structural stability and flatness of the electrode assembly.

In some embodiments, the production system includes a detection device for detecting a relative position of a first pole piece and a second pole piece in the electrode assembly.

In this way, the detection device confirms that the first pole piece and the second pole piece are in the correct relative position, thereby avoiding puncture or cuts in the electrode assembly after winding due to the poor relative position of the first pole piece and the second pole piece.

Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG1 is a schematic diagram of the structure of a production device provided by some embodiments of the present invention;

FIG2 is a schematic diagram of the structure of a production device provided by some embodiments of the present invention;

FIG3 is a cross-sectional view of a first adsorption device provided in some embodiments of the present invention;

FIG4 is a schematic diagram of the structure of a second adsorption device in some embodiments of the present invention from a top view;

FIG. 5 is a schematic diagram of the structure of a production system provided by some embodiments of the present invention.

Description of reference numerals:
Production system 1000, production equipment 100, first equipment 101, second equipment 102, first sheet component 201, second sheet component
202, pole piece 300, first pole piece 301, second pole piece 302, diaphragm 400, first diaphragm 401, second diaphragm 402, layer assembly 500, electrode assembly 600;
Lamination device 10, lamination roller group 11, lamination roller 110, conveying device 20, transmission belt 21, first adsorption hole 210, first limit device 30, limit plate 31, second adsorption hole 310, second limit device 40, insert feeding mechanism 41, cutting mechanism 42, conveying roller group 50, first conveying roller 51, second conveying roller 52, correction device 60, detection device 70.

DETAILED DESCRIPTION

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

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly used by one of ordinary skill in the art to which this invention belongs. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions.

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

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

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

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

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

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

At present, judging from the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of battery application fields, its market demand is also constantly expanding.

A battery cell includes a positive electrode sheet, a negative electrode sheet, an electrolyte and a separator. Lithium-ion battery cells mainly rely on the movement of lithium ions between the positive electrode sheet and the negative electrode sheet to work. In cylindrical battery cells, the thin film structure of multiple layers of material is wound into a cylindrical electrode assembly, while in rectangular battery cells, the thin film structure is wound or stacked into an electrode assembly with a roughly rectangular shape.

In the manufacturing process of the battery cell, a winding machine is used to wind two pole pieces in different material lines together. The two pole pieces will be sent to the winding needle of the winding machine separately. The two pole pieces need to maintain a certain relative position, otherwise it is easy to cause poor lithium deposition. Specifically, the two pole pieces are offset in the length or width direction. Lithium ions are not transferred from one pole piece to another, but are deposited in the area outside the pole piece, thereby generating lithium crystals, causing punctures, cuts and other defects in the electrode assembly formed by the pole piece, which in turn leads to safety risks in the battery cell.

Therefore, in order to ensure the relative position of the two pole pieces, to avoid punctures, cuts and other defects in the electrode assembly formed after winding, and to avoid these adverse effects on subsequent processes (such as welding, etc.), the pole pieces and the diaphragm can be stacked together first, confirming that the pole pieces are in the correct position, and then winding.

However, the pole piece has a free end, and during the stacking process, the free end of the pole piece is prone to swing or position shift, resulting in bending, wrinkling, deformation and other undesirable phenomena at the end of the pole piece. In order to solve the above problems, the present invention proposes the following technical solutions.

Please refer to FIG. 1 , which is a schematic diagram of the structure of a production device 100 provided in some embodiments of the present invention. The production device 100 of the embodiment of the present invention comprises a pressing device 10, a conveying device 20, a first limiting device 30 and a second limiting device 40. The pressing device 10 is used to press the first sheet component 201 and the second sheet component 202 and stack the first sheet component 201 and the second sheet component 202, the conveying device 20 is used to convey the first sheet component 201 to the pressing device 10, the first limiting device 30 is arranged between the pressing device 10 and the conveying device 20, the first limiting device 30 is used to limit the position of the end of the first sheet component 201, the second limiting device 40 is arranged on the side of the conveying device 20 away from the first limiting device 30, and the second limiting device 40 is used to limit the first sheet component 201 to be located at the end of the conveying device 20. The position on one side of the delivery device 20.

Specifically, the laminating device 10 is a mechanism for conveying and laminating the first sheet member 201 and the second sheet member 202 together. The first sheet member 201 and the second sheet member 202 can be thin sheets or films extending continuously in a certain direction. The head of the first sheet member 201 first passes through the conveying device 20 and enters the laminating device 10, and is attached to the second sheet member 202. The direction in which the conveying device 20 and the laminating device 10 convey the first sheet member 201 can be consistent with the extension direction of the first sheet member 201. The first limiting device 30 is located between the conveying device 20 and the laminating device 10, supporting the first sheet member 201 that has been separated from the conveying device 20 and has not entered the laminating device 10 during the transportation process, effectively reducing the positional displacement, deformation or damage of the part of the first sheet member 201 that has been separated from the conveying device 20 and has not entered the laminating device 10, and in particular, can prevent the free end of the first sheet member 201 from falling or swinging due to its own weight, thereby improving the integrity and flatness of the first sheet member 201 entering the laminating device 10.

The second limiting device 40 can limit the first sheet component 201 to maintain a position that is flush with the first sheet component 201 on the conveying device 20 along the conveying direction and aligned along the width direction W and thickness direction of the first sheet component 201 on the conveying device 20 on the side away from the first limiting device 30. Along the conveying direction L of the conveying device 20, the end of the first sheet component 201 close to the head can be pressed and clamped by the pressing device 10, and the position is limited by the first limiting device 30. At the same time, the end of the first sheet component 201 close to the tail is limited by the second limiting device 40. By limiting the head and tail ends of the first sheet component 201, the position accuracy of the first sheet component 201 relative to the second sheet component 202 is improved.

The production equipment 100 further includes a conveying roller set 50 for conveying the first sheet member 201, the second sheet member 202, and the layer assembly 500 or the electrode assembly 600 formed by laminating the first sheet member 201 and the second sheet member 202. The conveying roller set 50 may include a first conveying roller 51 located at one side of the laminating device 10, and the first conveying roller 51 is used to convey the second sheet member 202 to the laminating device 10.

In some embodiments, referring to FIG. 1 , the first sheet component 201 is a pole piece 300 , and the second sheet component 202 is a diaphragm 400 .

In some embodiments, referring to FIG. 2 , the first sheet component 201 may be a layer assembly 500 formed by pressing together a pole piece 300 and a diaphragm 400 , and correspondingly, the second sheet component 202 is a pole piece 300 of another polarity.

In some embodiments, the first sheet component 201 may be a pole piece 300 , and the second sheet component 202 may be a layer assembly 500 formed by pressing a pole piece 300 of another polarity and a diaphragm 400 together.

The production equipment 100 of the embodiment of the present application limits the position of the end of the first sheet component 201 by the first limit device 30. During the pressing and stacking process of the first sheet component 201 and the second sheet component 202, the displacement of the end of the first sheet component 201 relative to the second sheet component 202 is limited, thereby solving the problem of the end of the electrode sheet 300 being easily bent during the stacking process of the electrode sheet 300 and the diaphragm 400.

Please refer to FIG. 1 . In some embodiments, the laminating device 10 includes a laminating roller set 11 . The laminating roller set 11 includes two opposite laminating rollers 110 . The two laminating rollers 110 are used to laminarly transfer the first sheet member 201 and the second sheet member 202 .

Specifically, the laminating device 10 may include components such as a laminating roller 110, a pneumatic cylinder, and a conveyor belt to achieve the functions of laminating and conveying. In some embodiments, the two laminating rollers 110 in the laminating roller group 11 may be arranged parallel to each other, and the line connecting the centers of the two laminating rollers 110 may be consistent with the thickness direction of the first sheet member 201. The two laminating rollers 110 may laminarly laminate the first sheet member 201 and the second sheet member 202 to form a composite structure, and convey the composite structure.

In some embodiments, the first sheet component 201 is the electrode 300, and the second sheet component 202 is the diaphragm 400. The diaphragm 400 may include a first diaphragm 401 and a second diaphragm 402, and the first diaphragm 401 and the second diaphragm 402 are respectively pressed onto the opposite sides of the electrode 300 along the thickness direction. The diaphragm 400 can be used to separate the positive and negative electrode sheets 300 to prevent the positive and negative electrode sheets 300 from directly contacting and short-circuiting. The diaphragm 400 can be made of a film-like material with poor conductivity, such as a polymer film. In this embodiment, the number of the first conveying rollers 51 can be two, and a first conveying roller 51 is provided on each of the opposite sides of the two pressing rollers 110, and the two first conveying rollers 51 convey the first diaphragm 401 and the second diaphragm 402 respectively.

Thus, the first sheet member 201 and the second sheet member 202 pass between two opposite laminating rollers 110 , and the laminating roller group 11 enables the first sheet member 201 and the second sheet member 202 to fit tightly together, and the laminating roller group 11 can laminarly and convey the first sheet member 201 and the second sheet member 202 at the same time, thereby improving production efficiency.

Please refer to Figures 1 and 3, Figure 3 is a schematic cross-sectional view of a conveying device 20 of some embodiments of the present application. In some embodiments, the conveying device 20 includes a conveyor belt 21, and the conveyor belt 21 is formed with first adsorption holes 210, which can form negative pressure to adsorb the first sheet member 201.

Specifically, the number of the first adsorption holes 210 may be one or more, for example, the number of the first adsorption holes 210 may be two, three, four or even more. The conveying device 20 may include a negative pressure chamber (the blank elliptical portion in the center of FIG. 3 ), and the negative pressure chamber may be The conveyor belt 21 is surrounded, and the negative pressure chamber can form a negative pressure in the first adsorption holes 210 to adsorb the first sheet component 201. Further, a plurality of first adsorption holes 210 can be arranged at intervals along the conveying direction L of the conveyor belt 21, so as to adsorb the first sheet component 201 at a plurality of points to improve the transport stability of the first sheet component 201. The magnitude of the negative pressure can be flexibly adjusted, so as to adapt to first sheet components 201 of different types or sizes.

In this way, when the conveyor belt 21 is conveying the first sheet component 201, the first sheet component 201 can be adsorbed to a fixed position on the conveyor belt 21, thereby reducing the slippage or misalignment of the first sheet component 201 during movement, thereby reducing wrinkles and other defects caused by misalignment.

Please refer to Figures 1 and 4, which is a schematic diagram of the structure of the first limiting device 30 in some embodiments of the present application from a top view. In some embodiments, the first limiting device 30 includes a limiting plate 31, and the limiting plate 31 is formed with a second adsorption hole 310, and the second adsorption hole 310 can form a negative pressure to adsorb the first sheet member 201.

Specifically, the limiting plate 31 can be arranged along the conveying direction L of the conveyor belt 21 and the width direction W of the first sheet member 201. The plane where the limiting plate 31 is located is flush with the conveying surface of the conveyor belt 21 and the interval between the two pressing rollers 110. The number of the second adsorption holes 310 can be one, two, three, four or even more. The second adsorption holes 310 can be arranged at intervals along the conveying direction L of the conveyor belt 21 and the width direction W of the first sheet member 201 to enhance the adsorption force on the first sheet member 201.

In conjunction with Figure 1, the end of the first sheet component 201 that first separates from the conveyor belt 21 along the conveying direction L of the conveyor belt 21 is the head, and the end that separates from the conveyor belt 21 last is the tail. Before the tail of the first sheet component 201 separates from the conveyor belt 21, all parts of the first sheet component 201 except the tail are limited and conveyed by the lamination roller group 11 and the limiting plate 31 (or the second limiting device 40) at both ends. After the tail of the first sheet component 201 separates from the conveyor belt 21, it is a free end and is only conveyed by the lamination roller group 11. It is easy to be misaligned with the second sheet component 202 or bend due to up and down swinging. By adsorbing the first sheet component 201 between the conveyor belt 21 and the lamination roller 110 by the limiting plate 31, the position of the first sheet component 201 can be limited, and in particular, the misalignment or bending of the tail of the first sheet component 201 can be reduced.

In this way, the limiting plate 31 can absorb the first sheet component 201 by forming a negative pressure through the second adsorption hole 310, so that the first sheet component 201 is in a position where it can be accurately attached to the second sheet component 202 during the production process. In addition, by adsorbing the first sheet component 201 with negative pressure, the adsorption force is easy to control, which is conducive to conveying the first sheet component 201. The limiting plate 31 is located between the pressing device 10 and the conveying device 20, and can limit the displacement of the end of the first sheet component 201, thereby reducing the probability of bending of the end of the first sheet component 201.

Referring to FIG. 1 and FIG. 4 , in some embodiments, the second adsorption hole 310 is used to communicate with the atmosphere when supporting the head of the first sheet member 201 ; and to form negative pressure when supporting the portion of the first sheet member 201 other than the head.

Specifically, when the second adsorption hole 310 is connected to the atmosphere, the first adsorption hole 210 has no adsorption force on the first sheet member 201, and the limiting plate 31 can support the first sheet member 201 in the thickness direction of the first sheet member 201. After the head of the first sheet member 201 is separated from the conveyor belt 21 and before entering the laminating roller group 11, it is conveyed only through the portion of the first sheet member 201 located on the conveyor belt 21. Therefore, when the head of the first sheet member 201 is located at the limiting plate 31, the limiting plate 31 supports the head, and the second adsorption hole 310 does not perform adsorption, so that the head of the first sheet member 201 can smoothly pass through the limiting plate 31 and enter between the two laminating rollers 110.

After the head of the first sheet member 201 enters between the two pressing rollers 110, the second suction hole 310 forms a negative pressure to suck the first sheet member 201. At this time, all parts of the first sheet member 201 except the head can be limited by the pressing roller group 11 for limiting the head and the limiting plate 31 for limiting the tail, the conveyor belt 21 or the second limiting device 40, and can be conveyed by the pressing roller group 11 and the conveyor belt 21.

In this way, when the head of the first component is at the lamination roller group 11, the second adsorption hole 310 is connected to the atmosphere, and it is not easy to hinder the head of the first sheet component 201 from passing through the lamination roller group 11, and when the head of the first sheet component 201 enters the lamination roller group 11, the second adsorption hole 310 forms a negative pressure, adsorbs the part of the first sheet component 201 except the head, and limits the first sheet component 201 to be in the correct position during the lamination process.

Please refer to FIG. 1 . In some embodiments, the second limiting device 40 includes an insert feeding mechanism 41 . The insert feeding mechanism 41 can absorb the first sheet member 201 by means of negative pressure to limit the first sheet member 201 .

Specifically, the first sheet component 201 can be inserted into the insert sheet feeding mechanism 41 and transported by the insert sheet feeding mechanism 41. Compared with manual feeding, the insert sheet feeding mechanism 41 can make the first sheet component 201 flatter and more accurately positioned during the insertion and transportation process. The direction in which the insert sheet feeding mechanism 41 transports the first sheet component 201 can be consistent with the conveying direction L of the conveyor belt 21. The insert sheet feeding mechanism 41 absorbs the first sheet component 201, so that the first sheet component 201 is in a fixed position in the thickness direction and the width direction W of the first sheet component 201 during the movement along the conveying direction L, thereby reducing the misalignment of the first sheet component 201 and the second sheet component 202.

In this way, the insert feeding mechanism 41 can continuously and stably transport the first sheet component 201. The insert feeding mechanism 41 absorbs the first sheet component 201, so that the first sheet component 201 remains flat during movement and reduces the misalignment or slippage of the first sheet component 201 during movement.

Please refer to FIG. 1 . In some embodiments, the second limiting device 40 includes a cutting mechanism connected to the insert feeding mechanism 41. 42, the cutting mechanism 42 is located at the discharge side of the insert feeding mechanism 41.

Specifically, the side of the insert feeding mechanism 41 close to the conveying device 20 is the discharging side. The cutting mechanism 42 can be cut by laser, mechanical cutting, etc. It can be understood that the material line length of the first sheet component 201 is relatively long, which makes the first sheet component 201 likely to break during the movement. Cutting the first sheet component 201 can divide the first sheet into multiple sub-components of the first sheet component 201, and the sub-components have a smaller length-to-width ratio and higher rigidity. Therefore, the cutting mechanism 42 cuts off the first sheet component 201, which can reduce the probability of the first sheet component 201 and the laminated structure formed by the lamination being broken as a whole.

After the cutting mechanism 42 cuts off the first sheet component 201, the tail of the previous first sheet component 201 and the head of the next first sheet component 201 are distributed on both sides of the cutting mechanism 42. During the cutting process, the insert sheet feeding mechanism 41 and the conveyor belt 21 are always in a negative pressure state, the insert sheet feeding mechanism 41 absorbs the head of the next first sheet component 201, and the conveyor belt 21 absorbs the tail of the previous first sheet component 201, so as to reduce the deformation or dislocation of the first sheet component 201.

In this way, the cutting mechanism 42 can cut the first sheet member 201 into different sizes during the movement of the first sheet member 201, thereby improving production efficiency. In addition, after the cutting mechanism 42 cuts off the first sheet member 201, the inserting sheet feeding mechanism 41 can still absorb the first sheet member 201 to limit the swing of the head of the first sheet member 201.

Please refer to FIG. 1 . In some embodiments, the production equipment 100 includes a deviation-correcting device 60 disposed between the conveying device 20 and the second limiting device 40 . The deviation-correcting device 60 is used to correct the relative position of the first sheet component 201 and the second sheet component 202 .

Specifically, the cutting mechanism 42 cuts off the first sheet member 201 at the insert feeding mechanism 41, forming two new free ends, the tail of the previous first sheet member 201 and the head of the next first sheet member 201, which are prone to slippage or misalignment. The first sheet member 201 has a predetermined position between the second limiting device 40 and the conveying device 20. The first sheet member 201 is located at the predetermined position so that when the first sheet member 201 and the second sheet member 202 are pressed together, the first sheet member 201 and the second sheet member 202 are directly opposite or the first sheet member 201 is completely covered by the second sheet member 202.

The deflection correcting device 60 detects whether the first sheet member 201 is in the correct predetermined position when the first sheet member 201 passes through the deflection correcting device 60. In the case where the first sheet member 201 deviates from the predetermined position, the deflection correcting device 60 can connect the first sheet member 201 to make the first sheet member 201 deviate in the width direction W of the first sheet member 201, and correct the position of the first sheet member 201.

In this way, the correcting device 60 can shift the first sheet member 201 along the width direction W of the first sheet member 201 when the first sheet member 201 is misaligned, thereby correcting the misalignment so that the first sheet member 201 and the second sheet member 202 are aligned in the width direction W.

Please refer to FIG. 5 , a production system 1000 according to an embodiment of the present application includes a production device 100 according to any one of the above embodiments.

Specifically, the production equipment 100 in the production system 1000 may include a set of pressing devices 10, a conveying device 20, a first limiting device 30 and a second limiting device 40, and may also include two or more sets of pressing devices 10, conveying devices 20, first limiting devices 30 and second limiting devices 40. The production system 1000 may be used to produce two-layer, three-layer, four-layer or even more than four-layer sheet-like laminated products.

In this way, the production system 1000 of the embodiment of the present application limits the first sheet component 201 by the conveying device 20, the first limiting device 30 and the second limiting device 40, so as to reduce the displacement of the first sheet component 201 relative to the second sheet component 202 during the process of pressing and stacking the first sheet component 201 and the second sheet component 202 in the production equipment 100, thereby reducing the probability of adverse phenomena such as bending.

Please refer to FIG. 5 . In some embodiments, there are two production devices 100 , which are respectively a first device 101 and a second device 102 . The first device 101 and the second device 102 are arranged in parallel. In the first device 101 , the first sheet component 201 is the first pole piece 301 , and the second sheet component 202 is the diaphragm 400 . The first device 101 is used to press the first pole piece 301 and the diaphragm 400 to form a layer assembly 500 . In the second device 102 , one of the first sheet component 201 and the second sheet component 202 is the second pole piece 302 , and the other is the layer assembly 500 . The second device 102 is used to press the second pole piece 302 and the layer assembly 500 to form an electrode assembly 600 .

Specifically, the first pole piece 301 and the second pole piece 302 have opposite polarities. In the first device 101, the first diaphragm 401 and the second diaphragm 402 are respectively tightly attached to the opposite surfaces of the first pole piece 301 in the thickness direction. The first diaphragm 401, the first pole piece 301 and the second diaphragm 402 are pressed together to form a layer assembly 500, and the layer assembly 500 is kept flat and transferred to the second device 102. The flat state of the layer assembly 500 refers to the state in which the layer assembly 500 is not wound and can extend along a straight line. The layer assembly 500 enters the second device 102 and is pressed together with the second pole piece 302 to form an electrode assembly 600. The electrode assembly 600 is conveyed to the winding machine in a flat state and is wound in the winding machine.

In this way, a layer assembly 500 consisting of a first electrode piece 301 and a diaphragm 400 can be manufactured by the first device 101, and the first electrode piece 301, the diaphragm 400 and the second electrode piece 302 can be stacked and pressed by the second device 102, so that the first electrode piece 301, the diaphragm 400 and the second electrode piece 302 are tightly fitted in sequence, thereby improving the structural stability and flatness of the electrode assembly 600.

Please refer to FIG. 5 . In some embodiments, the production system 1000 includes a detection device 70 . The detection device 70 is used to detect the relative position of the first electrode piece 301 and the second electrode piece 302 in the electrode assembly 600 .

Specifically, the detection device 70 can be arranged on one side of the pressing device 10 along the conveying direction L of the conveyor belt 21. The detection device 70 can use a laser sensor, an X-ray camera, a CCD (charge coupled device) visual sensor, etc. to accurately detect the relative position of the first sheet component 201 and the second sheet component 202, so as to ensure that the first electrode piece 301, the second electrode piece 302 and the diaphragm 400 are pressed together in the correct position. The first sheet component 201 and the second sheet component 202 are pressed together by the pressing device 10 to form an electrode assembly 600.

In this way, the detection device 70 confirms that the first pole piece 301 and the second pole piece 302 are in the correct relative position, thereby avoiding puncture or cuts of the electrode assembly 600 after winding due to the poor relative position of the first pole piece 301 and the second pole piece 302.

In one embodiment, the first sheet component 201 in the first device 101 is the first pole piece 301, and the second sheet component 202 is two diaphragms 400. Before the cutting mechanism 42 cuts off the first pole piece 301, the first pole piece 301 extends along the conveying direction L of the conveyor belt 21, and the insert feeding mechanism 41, the conveyor belt 21 and the adsorption plate sequentially adsorb the tail and head of the first pole piece 301 along the conveying direction L. After the first pole piece 301 is cut off, the insert feeding mechanism 41 and the correction device 60 correct the position of the head and tail of the first pole piece 301, and the conveyor belt 21 and the adsorption plate adsorb the first pole piece 301. The first pole piece 301 and the two layers of diaphragms 400 are laminated and compounded by the pressing roller group 11 to form a three-layer layer assembly 500.

Further, the layer assembly 500 enters the second device 102 through the second conveying roller 52, and can be used as the first sheet component 201 in the second device 102. Correspondingly, the second sheet component 202 in the second device 102 is the second pole piece 302. The cutting mechanism 42 of the second device 102 cuts the diaphragm 400 in the layer assembly 500 so that the size of the diaphragm 400 matches the first pole piece 301. Before cutting the diaphragm 400, the insert feeding mechanism 41, the conveyor belt 21 and the adsorption plate successively adsorb the tail and head of the layer assembly 500 along the conveying direction L. After cutting the diaphragm 400, the insert feeding mechanism 41 adsorbs the next layer assembly 500, the deviation correction device 60 corrects the position of the head and tail of the layer assembly 500, and the conveyor belt 21 and the adsorption plate adsorb the previous layer assembly 500. The pressing roller group 11 in the second device 102 presses the layer assembly 500 and the second pole piece 302 to form an electrode assembly 600. The positions of the head and tail of the electrode component are detected and corrected by the conveyor belt 21 and the detection device 70 .

Finally, the electrode assembly 600 is transported to the area where the winding machine (not shown) is located by the conveying roller group 50, so as to complete the winding of the electrode assembly 600.

In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims (11)

A production equipment, characterized in that it comprises: A pressing device, used for pressing the first sheet component and the second sheet component to make the first sheet component and the second sheet component overlap; A conveying device, used for conveying the first sheet member to the pressing device; a first limiting device, disposed between the pressing device and the conveying device, the first limiting device being used to limit the position of the end of the first sheet member; and The second limiting device is arranged on a side of the conveying device away from the first limiting device, and the second limiting device is used to limit the position of the first sheet component on one side of the conveying device. The production equipment according to claim 1 is characterized in that the laminating device includes a laminating roller group, the laminating roller group includes two opposite laminating rollers, and the two laminating rollers are used to press and convey the first sheet component and the second sheet component. The production equipment according to claim 1 or 2 is characterized in that the conveying device includes a conveyor belt, and the conveyor belt is formed with first adsorption holes, and the first adsorption holes can form negative pressure to adsorb the first sheet component. The production equipment according to claims 1-3 is characterized in that the first limiting device includes a limiting plate, the limiting plate is formed with a second adsorption hole, and the second adsorption hole can form a negative pressure to adsorb the first sheet component. The production equipment according to claim 4 is characterized in that the second adsorption hole is used to communicate with the atmosphere when supporting the head of the first sheet member; and is used to form negative pressure when supporting the part of the first sheet member other than the head. The production equipment according to claims 1-5 is characterized in that the second limiting device includes an insert feeding mechanism, and the insert feeding mechanism can absorb the first sheet component by negative pressure to limit the first sheet component. The production equipment according to claim 6 is characterized in that the second limiting device includes a cutting mechanism connected to the insert feeding mechanism, and the cutting mechanism is located on the discharge side of the insert feeding mechanism. The production equipment according to claims 1-7 is characterized in that the production equipment includes a correcting device arranged between the conveying device and the second limiting device, and the correcting device is used to correct the relative position of the first sheet component and the second sheet component. A production system, characterized in that it comprises the production equipment according to any one of claims 1 to 8. The production system according to claim 9, characterized in that the number of the production equipment is two and they are respectively a first equipment and a second equipment, the first equipment and the second equipment are arranged in parallel, in the first equipment, the first sheet component is a first pole piece, the second sheet component is a diaphragm, and the first equipment is used to press the first pole piece and the diaphragm to form a layer assembly; In the second device, one of the first sheet component and the second sheet component is a second pole piece, and the other is the layer assembly, and the second device is used to press the second pole piece and the layer assembly together to form an electrode assembly. The production system according to claim 10 is characterized in that the production system includes a detection device, and the detection device is used to detect the relative position of the first pole piece and the second pole piece in the electrode assembly.