CN221327755U - Cold pressing equipment and battery production line - Google Patents

Abstract

The application relates to the technical field of battery manufacturing, and provides cold pressing equipment and a battery production line. Wherein, cold pressing equipment includes: the unreeling mechanism comprises an unreeling shaft, and the unreeling shaft is used for releasing the unreeling pole piece to be subjected to cold-pressing treatment; the tape connecting mechanism is arranged at one side of the unreeling mechanism; the clamping roller assembly is arranged between the unreeling mechanism and the tape receiving mechanism and comprises a first clamping roller and a second clamping roller which are arranged in parallel, a pole piece unreeled by the unreeling shaft can pass through a gap between the first clamping roller and the second clamping roller and enter the tape receiving mechanism, and the first clamping roller and the second clamping roller are configured to clamp and apply clamping force to the pole piece. According to the technical scheme, the fixing loss of each roll of pole piece is reduced, the pole piece utilization rate is improved, and the battery manufacturing cost is reduced.

Description

Cold pressing equipment and battery production line

Technical Field

The application relates to the technical field of battery manufacturing, in particular to cold pressing equipment and a battery production line.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

In the cold pressing process of preparing the battery core of the power battery, the pole piece needs to be subjected to cold pressing processing after the pole piece material roll is unreeled through unreeling equipment. At present, after the unreeling of the last coil of material is completed, the coil is replaced manually, and the head of the next coil and the tail of the last coil are connected and fixed by a tape connecting mechanism.

Before the tape is attached, the pole piece in the tape attaching mechanism needs to maintain tension to keep a tight state so as to ensure that the pole piece can be kept flat when the tape attaching mechanism presses the pole piece.

In the existing cold pressing equipment, the tension of the pole piece between the tape connecting mechanism and the unwinding shaft is provided through the unwinding shaft, the tail part of the pole piece of the previous roll before tape connection is required to be kept connected with the unwinding shaft, when the pressing piece in the tape connecting mechanism presses the pole piece, the pole piece of the previous roll is cut off at the position of the tape connecting mechanism, and the pole piece of the next roll is connected with the tape head of the pole piece of the next roll in the tape connecting mechanism. Therefore, the above-mentioned tape splicing process inevitably causes the waste of the loss of the pole piece from the tape splicing mechanism to the unreeling shaft in the pole piece of the previous roll, so that each roll of pole piece has fixed loss.

Disclosure of utility model

The application aims to provide cold pressing equipment and a battery production line, which are used for reducing the fixed loss of each roll of pole piece in the process of connecting the pole pieces, thereby improving the utilization rate of the pole pieces and reducing the manufacturing cost of the battery. The aim is achieved by the following technical scheme:

In a first aspect, the present application provides a cold pressing apparatus comprising: the unreeling mechanism comprises an unreeling shaft, and the unreeling shaft is used for releasing the unreeling pole piece to be subjected to cold-pressing treatment; the tape connecting mechanism is arranged at one side of the unreeling mechanism; the clamping roller assembly is arranged between the unreeling mechanism and the tape receiving mechanism and comprises a first clamping roller and a second clamping roller which are arranged in parallel, a pole piece unreeled by the unreeling shaft can pass through a gap between the first clamping roller and the second clamping roller and enter the tape receiving mechanism, and the first clamping roller and the second clamping roller are configured to clamp and apply clamping force to the pole piece.

According to the cold pressing equipment provided by the application, the clamping roller assembly is arranged between the unreeling mechanism and the tape receiving mechanism, the first clamping roller and the second clamping roller are used for clamping the pole piece, and even if the unreeling mechanism is used for unreeling the pole piece and the pole piece is separated from the unreeling mechanism, the pole piece can still be clamped through the clamping roller assembly to provide tension for the pole piece between the clamping roller assembly and the tape receiving mechanism, so that part of the pole piece between the unreeling mechanism and the clamping roller assembly can still be effectively utilized, the fixing loss of each roll of pole piece is reduced, the coating efficiency of the pole piece is improved, and the manufacturing cost of a battery is reduced.

In addition, the cold pressing equipment provided by the application can also have the following additional technical characteristics:

In some embodiments of the application, the nip roller assembly further comprises a movable mechanism having a movable member capable of reciprocating in a first direction, the movable member being coupled to the second nip roller to drive the second nip roller toward or away from the first nip roller, the first direction intersecting an axis of the first nip roller and an axis of the second nip roller, respectively.

The movable mechanism has the main functions that: before the step of carrying out the pole piece tape splicing operation, in the process of carrying out the normal cold pressing process, driving the second clamping roller to be far away from the first clamping roller through the movable mechanism, so that the size of a gap between the first clamping roller and the second clamping roller is larger than the thickness of the pole piece, and the pole piece is separated from a contact state with the first clamping roller and the second clamping roller, and the pole piece is not clamped by the clamping roller assembly at the moment, so that the obstruction of the clamping roller assembly on the pole piece is reduced, and the cold pressing equipment can carry out the cold pressing process step at a higher speed in the cold pressing process, thereby improving the production efficiency; when the unreeling mechanism is about to completely release the last roll of pole piece, the second clamping roller is driven by the movable mechanism to be close to the first clamping roller, so that the first clamping roller and the second clamping roller clamp the pole piece, and the pole piece between the clamping roller assembly and the tape connecting mechanism keeps tension, so that the tape connecting step is carried out on the premise of reducing the fixing loss of each roll of pole piece.

In some embodiments of the application, the distance between the unwind mechanism and the pinch roller assembly is H and the distance between the pinch roller assembly and the take-up mechanism is L, L < H, in a second direction, wherein the second direction is perpendicular to the first direction.

The clamping roller assembly is arranged close to the tape connecting mechanism, so that the length of the pole piece between the clamping roller assembly and the tape connecting mechanism is smaller than that between the clamping roller assembly and the unreeling mechanism, and the fixing loss of each roll of pole piece is reduced as much as possible.

In some embodiments of the application, the movable mechanism comprises: the support seat comprises a first support arm, a first sliding structure is arranged on the first support arm, and one end of the second clamping roller is slidably arranged on the first sliding structure; the driving component comprises a driving piece and a movable piece in transmission connection with the driving piece, and the driving piece is used for driving the movable piece to move along a first direction.

The gap between the second clamping roller and the first clamping roller can be controlled through the driving component, so that the pressure applied by the first clamping roller and the second clamping roller to the pole piece is controlled, and the possibility that the pole piece is crushed by the clamping roller assembly is reduced.

In some embodiments of the present application, the support base further includes a second support arm disposed opposite to the first support arm, the second support arm is provided with a second sliding structure, and an end of the second clamping roller facing away from the first support arm is slidably disposed on the second sliding structure.

The supporting seat is used for providing relatively stable support for the second clamping roller, and the moving direction of the second clamping roller is limited through the first sliding structure and the second sliding structure, so that the moving process of the second clamping roller is more stable and reliable. The driving member is used for driving the second clamping roller to move.

In some embodiments of the application, the drive member comprises a power cylinder comprising a cylinder body and a piston rod, the cylinder body being the drive member and the piston rod being the movable member.

The power cylinder comprises a pneumatic cylinder and a hydraulic cylinder, and has the advantages of simple structure, reliable operation and the like. When the piston rod in the power cylinder reciprocates, no transmission gap exists, the motion is stable, the control precision is high, the pressure born by the pole piece is more stable, accurate and controllable in the process of clamping the pole piece by the first clamping roller and the second clamping roller, tension is provided for the pole piece between the clamping roller assembly and the belt receiving mechanism, and the possibility that the pole piece is crushed by the clamping roller assembly is further reduced.

In some embodiments of the present application, the number of the driving members is two, the two driving members are respectively provided on the first supporting arm and the second supporting arm, and the two movable members are respectively connected to two ends of the second pinch roller.

Through setting up two drive components, promote the second pinch roller from the both ends of second pinch roller respectively and remove, make the removal of second pinch roller more steady, and two drive components can carry out spacingly to the second pinch roller at the both ends of second pinch roller respectively to the gesture of accessible two drive components is adjusted the second pinch roller, reduces the degree of second pinch roller slope for first pinch roller, makes first pinch roller and second pinch roller exert on the pressure on the pole piece more even.

In some embodiments of the application, the cold pressing apparatus further comprises a receiving platform arranged below the unreeling shaft, and a receiving surface for receiving the pole piece is arranged on the side of the receiving platform facing the unreeling mechanism.

Through setting up the accepting platform in the below of unreeling axle, when unreeling axle releases the pole piece completely, accept the platform and be used for accepting the pole piece that falls from unreeling axle for the pole piece can not contact with ground and lead to the pollution of pole piece.

In some embodiments of the application, the receiving platform is a telescoping platform that is telescoping in the second direction; the second direction is perpendicular to the first direction.

The telescopic platform can be converted in two states of contraction and expansion, when the supporting platform is needed, the telescopic platform can be expanded, and when the supporting platform is not needed, the telescopic platform is contracted, so that the occupied space of the supporting platform is reduced.

In some embodiments of the application, a scalable platform comprises: the telescopic mechanism comprises at least two telescopic units which are connected in sequence and can extend and retract along a second direction; at least two baffles, the baffle links to each other with flexible unit in a one-to-one correspondence, and the baffle is towards the side face of unreeling mechanism and is accepted the face, and whole baffles can be under flexible unit's drive along the second direction flexible.

The plurality of independent telescopic units capable of stretching can respectively drive the baffle plates arranged on the telescopic units to move, so that the plurality of baffle plates can shrink and stretch in the second direction.

In some embodiments of the application, the receiving surface is configured as a planar and/or curved surface.

When the pole piece is contacted with the bearing surface and slides on the bearing surface, the plane or the curved surface of the bearing surface can reduce the possibility of scratching the pole piece caused by sliding friction.

In some embodiments of the application, the receiving surface is planar, and the second direction is horizontal or is at an angle to the horizontal.

The bearing surface extends along the horizontal direction so as to increase the contact area between the pole piece and the bearing surface and the sliding distance between the pole piece and the bearing surface and reduce the possibility of the contact of the pole piece and the ground.

In some embodiments of the application, the cold pressing apparatus further comprises a cold pressing mechanism, wherein the cold pressing mechanism is arranged between the unreeling mechanism and the clamping roller assembly, and the cold pressing mechanism is used for performing cold pressing treatment on the pole piece.

The cold pressing mechanism is used for carrying out a cold pressing procedure on the pole piece, compacting the pole piece coating material, reducing the volume of the pole piece and improving the energy density of the battery.

In some embodiments of the application, the cold press apparatus further comprises a first set of guide rollers disposed between the unreeling mechanism and the cold press mechanism, the first set of guide rollers comprising at least one guide roller.

The guide rollers in the first guide roller group are used for supporting and guiding the pole piece, so that the pole piece can smoothly move from the unreeling mechanism to the cold pressing mechanism.

In some embodiments of the application, the cold press apparatus further comprises a second set of guide rollers disposed between the unwind mechanism and the take-up mechanism, the second set of guide rollers comprising at least one guide roller.

The guide rollers in the second guide roller set are used for supporting and guiding the pole piece, so that the pole piece can smoothly move from the cold pressing mechanism to the clamping roller assembly.

In some embodiments of the application, the outer circumferential surface of the first nip roller is coated with an elastic laminate; or, the outer peripheral surface of the second nip roller is coated with an elastic pressing layer.

By providing an elastic lamination on the outer peripheral surface of the first nip roller or the second nip roller, the possibility that the first nip roller and the second nip roller generate indentations on the pole piece when pressing the pole piece is reduced.

In a second aspect, the application provides a battery production line comprising a cold press apparatus according to an embodiment of the second aspect.

An embodiment of the second aspect of the present application provides a battery production line, which includes the cold pressing apparatus according to the embodiment of the first aspect, so that the battery production line has the technical effects of any of the foregoing embodiments, and will not be described herein.

Drawings

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

FIG. 1 is a schematic diagram of a cold pressing apparatus according to some embodiments of the present application;

FIG. 2 is a schematic diagram of a second nip roller and a movable mechanism according to some embodiments of the present application;

FIG. 3 is a schematic view of a telescopic mechanism according to some embodiments of the present application;

FIG. 4 is a schematic view illustrating a structure of a receiving platform according to some embodiments of the present application;

FIG. 5 is a schematic view of a receiving platform according to some embodiments of the present application;

the reference numerals are as follows:

100. Cold pressing equipment;

10. An unreeling mechanism; 11. a reel is unreeled;

20. A tape splicing mechanism;

30. A nip roll assembly; 31. a first nip roller; 32. a second nip roller; 321. a roller section; 322. a roller shaft portion; 323. a sliding connection part; 331. a support base; 3311. a first support arm; 3312. a second support arm; 332. a driving member; 3321. a driving member; 3322. a movable member;

40. A receiving platform; 41. a telescoping mechanism; 411. a telescoping unit; 4111. a linear guide rail; 4112. a rotor seat; 4113. a connecting piece; 42. a baffle; 43. a receiving surface; 401. an accommodation gap;

50. A cold pressing mechanism; 51. a first press roller; 52. a second press roller;

61. A first guide roller set; 62. a second guide roller group; 601. a guide roller;

200. pole pieces.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

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

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the 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 orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

In the battery preparation process, the cold pressing process of the pole piece is to press the pole piece to the specified thickness through two pressing rollers with a certain gap and a certain pressure on the coated product, compact the pole piece coating material, reduce the volume of the pole piece and improve the energy density of the battery. Because the pole pieces have limited lengths, the cold pressing process of the pole pieces is to perform cold pressing treatment on a roll-by-roll basis, and the former and the latter pole pieces after the cold pressing treatment are connected and fixed by the tape connecting mechanism. Before the tape is attached, the pole piece in the tape attaching mechanism needs to maintain tension to keep a tight state so as to ensure that the pole piece can be kept flat when the tape attaching mechanism presses the pole piece. In the existing cold pressing equipment, the tension of the pole piece between the tape connecting mechanism and the unwinding shaft is provided through the unwinding shaft, the tail part of the pole piece of the previous roll before tape connection is required to be kept connected with the unwinding shaft, when the pressing piece in the tape connecting mechanism presses the pole piece, the pole piece of the previous roll is cut off at the position of the tape connecting mechanism, and the pole piece of the next roll is connected with the tape head of the next roll in the tape connecting mechanism. Therefore, the above-mentioned tape splicing process inevitably causes the waste of the pole piece loss between the tape splicing mechanism in the last reel of pole piece and the unreeling shaft, so that each reel of pole piece has fixed loss.

In order to reduce the fixed loss of each roll of pole piece and improve the pole piece coating efficiency, the application uses the clamping roller assembly to clamp the pole piece between the unreeling mechanism and the tape receiving structure, so as to realize the tension partition of the pole pieces before and after the clamping roller assembly, and the clamping roller assembly provides tension support for the pole piece under the condition that the unreeling mechanism is completely unreeled to separate the pole piece on the unreeling mechanism, so that part of the pole piece between the unreeling mechanism and the clamping roller assembly can still be effectively utilized, thereby reducing the fixed loss of each roll of pole piece, improving the pole piece coating efficiency and reducing the battery manufacturing cost.

According to some embodiments of the present application, as shown in fig. 1, the present application provides a cold press apparatus 100, the cold press apparatus 100 comprising an unreeling mechanism 10, a tape splicing structure, and a pinch roller assembly 30. Specifically, the unreeling mechanism 10 includes an unreeling shaft 11, the pole piece 200 to be cold-pressed is wound on the unreeling shaft 11, and the unreeling shaft 11 is used for releasing the pole piece 200 to be cold-pressed. The tape splicing mechanism 20 is arranged on one side of the unreeling mechanism 10; the clamping roller assembly 30 is arranged between the unreeling mechanism 10 and the tape receiving mechanism 20, the clamping roller assembly 30 comprises a first clamping roller 31 and a second clamping roller 32 which are arranged in parallel, the pole piece 200 unreeled by the unreeling shaft 11 passes through a gap between the first clamping roller 31 and the second clamping roller 32 and then is arranged on the tape receiving mechanism 20, and the first clamping roller 31 and the second clamping roller 32 are used for clamping the pole piece 200.

The unreeling mechanism 10 comprises an unreeling shaft 11, and the unreeling shaft 11 is rotatably arranged on a rack, wherein the rack is the basis of the whole cold pressing equipment 100, and the rack has enough rigidity and strength to reduce deformation. The unwinding shaft 11 comprises a rotating shaft and a winding drum sleeved outside the rotating shaft, the diameter of the winding drum is larger than that of the rotating shaft so as to be convenient for winding the pole piece 200, the rotating shaft is rotatably connected with the frame through a bearing, the unwinding shaft 11 can rotate under the driving of the pole piece 200, and when a winding mechanism and the like provide moving power for the pole piece 200, the pole piece 200 pulls the unwinding shaft 11 to rotate, so that the unwinding shaft 11 releases the pole piece 200.

The tape splicing mechanism 20 is used for connecting the tail of the last rolled pole piece 200 with the head of the next rolled pole piece 200, generally, the tape splicing mechanism 20 is provided with a tape splicing platform, a tape cutting mechanism and two pressing mechanisms which are arranged above the tape splicing platform at intervals, the two pressing mechanisms are respectively used for pressing the tail of the last rolled pole piece 200 and the head of the next rolled pole piece 200, the tape cutting mechanism is used for cutting off the pole piece 200, and after the last rolled pole piece 200 and the next rolled pole piece 200 are respectively pressed, the last rolled pole piece 200 and the next rolled pole piece 200 can be connected into a whole in an adhesive mode. The configuration of the tape splicing mechanism 20 described in this embodiment is merely one embodiment for explaining how to try out the tape splicing by the tape splicing mechanism 20, and the configuration of the tape splicing mechanism 20 may be other, and is not particularly limited herein.

The clamping roller assembly 30 comprises a first clamping roller 31 and a second clamping roller 32 which are arranged in parallel, and a gap between the first clamping roller 31 and the second clamping roller 32 is slightly smaller than the thickness of the pole piece 200, so that the first clamping roller 31 and the second clamping roller 32 can clamp the pole piece 200, the first clamping roller 31 and the second clamping roller 32 can rotate around own axes, friction between the first clamping roller 31 and the second clamping roller 32 and the pole piece 200 is rolling friction in the moving process of the pole piece 200, and therefore friction force between the pole piece 200 and the clamping roller assembly 30 is reduced, and the possibility that the pole piece 200 is scratched by the first clamping roller 31 and the second clamping roller 32 is reduced.

By providing the pinch roller assembly 30 between the unreeling mechanism 10 and the tape receiving mechanism 20, the first pinch roller 31 and the second pinch roller 32 are utilized to clamp the pole piece 200, even if the unreeling mechanism 10 is completed and the pole piece 200 is separated from the unreeling mechanism 10, the pole piece 200 can still be clamped by the pinch roller assembly 30 to provide tension for the pole piece 200 between the pinch roller assembly 30 and the tape receiving mechanism 20, so that the pole piece 200 between the unreeling mechanism 10 and the pinch roller assembly 30 can still be effectively utilized, thereby reducing the fixing loss of the pole piece 200 per roll, improving the coating efficiency of the pole piece 200 and reducing the manufacturing cost of the battery.

In some embodiments of the present application, as shown in fig. 2, the nip roller assembly 30 further includes a movable mechanism having a movable member 3322 that is reciprocally movable in a first direction, the first direction being a direction perpendicular to and intersecting the axis of the first nip roller 31 and the axis of the second nip roller 32, the movable member 3322 being connected to the second nip roller 32 to drive the second nip roller 32 toward or away from the first nip roller 31.

The movable mechanism may be provided in various configurations. For example, in some embodiments, the movable mechanism is a four bar mechanism, such as a crank-link slider mechanism, that uses crank rotation to drive a slider for reciprocation, and it is understood that the crank and the link are the drive portions of the movable mechanism and the slider is the movable member 3322 that reciprocates. In other embodiments, the movable mechanism may also be a curved chute mechanism, a cam spring mechanism, or the like, a cylinder mechanism, or the like. It is understood that the movable mechanism functions to drive the second pinch roller 32 to reciprocate in the first direction to approach or separate from the first pinch roller 31, thereby changing the size of the gap between the first pinch roller 31 and the second pinch roller 32. In this embodiment, the first direction is a vertical direction.

Before the step of carrying out the tape splicing operation of the pole piece 200, in the normal cold pressing process, the second clamping roller 32 is driven by the movable mechanism to be far away from the first clamping roller 31, so that the size of a gap between the first clamping roller 31 and the second clamping roller 32 is larger than the thickness of the pole piece 200, the pole piece 200 is separated from a contact state with the first clamping roller 31 and the second clamping roller 32, and the pole piece 200 is not clamped by the clamping roller assembly 30 at the moment, so that the obstruction of the clamping roller assembly 30 on the pole piece 200 is reduced, the cold pressing equipment 100 can carry out the cold pressing process step at a faster speed in the cold pressing process, and the production efficiency is improved; when the unreeling mechanism 10 is about to completely release the last roll of pole piece 200, the second clamping roller 32 is driven by the movable mechanism to approach the first clamping roller 31, so that the first clamping roller 31 and the second clamping roller 32 clamp the pole piece 200, and the pole piece 200 between the clamping roller assembly 30 and the tape splicing mechanism 20 is kept under tension, so that the tape splicing step is performed under the condition that the fixing loss of each roll of pole piece 200 is reduced.

In some embodiments of the application, as shown in fig. 1, the distance between the unwind mechanism and the pinch roller assembly is H and the distance between the pinch roller assembly and the take-up mechanism is L, L < H, in a second direction, wherein the second direction is perpendicular to the first direction.

The pinch roller assembly 30 is disposed proximate the tape splicing mechanism 20 such that the length of the pole piece 200 between the pinch roller assembly 30 and the tape splicing mechanism 20 is less than the length of the pole piece 200 between the pinch roller assembly 30 and the unwind mechanism 10. In this embodiment, the second direction is a horizontal direction.

The pinch roller assembly 30 is disposed immediately adjacent the tape mechanism 20 to minimize the length of the pole piece 200 between the pinch roller assembly 30 and the tape mechanism 20 to minimize the loss of securement of each roll of pole piece 200.

In some embodiments of the application, the movable mechanism includes a support 331 and a drive member 332. The support base 331 includes a first support arm 3311 disposed opposite to each other, the first support arm 3311 is provided with a first sliding structure, and one end of the second clamping roller 32 is slidably disposed on the first sliding structure. The driving member 332 includes a driving member 3321 and a movable member 3322 in driving connection with the driving member 3321, wherein the driving member 3321 is used for driving the movable member 3322 to reciprocate along a first direction.

The first clamping roller 31 is rotatably disposed on the frame, the supporting seat 331 may be integrally formed with the frame, or the supporting seat 331 is a partial area or a partial structure on the frame, and the supporting seat 331 may be independent of the frame and fixedly connected with the frame. The first sliding structure may be provided as a groove-like structure of a long bar shape extending in the first direction, or the first sliding structure may be provided as a long hole with a length direction of the long hole being parallel to the first direction. One end of the second pinch roller 32 is slidably disposed in the first sliding structure, so that the second pinch roller 32 can move along the first direction relative to the support base 331, and the second pinch roller 32 is close to or far from the first pinch roller 31.

The driving member 332 includes a driving member 3321 and a movable member 3322, where the driving member 3321 is in transmission connection with the movable member 3322, and the driving member 3321 is used for driving the movable member 3322 to reciprocate. Specifically, the driving member 332 may also be in a different structural form according to actual needs, for example, in some embodiments, the driving member 332 is specifically a nut screw mechanism, a screw is disposed along a first direction, the screw is rotatably disposed on the support seat 331, a nut is sleeved on the screw and is in threaded connection with the screw, the nut is slidably disposed in the first sliding structure or the second sliding structure, the first sliding structure limits rotation of the nut, and the nut can be made to reciprocate along the first direction by rotating the screw in a forward direction or a reverse direction, where the screw is a driving member 3321, and the nut is a movable member 3322. In other embodiments, the driving member 332 may be a ball screw, an electric push rod, a pneumatic cylinder, a hydraulic cylinder, or the like, which is not limited herein.

In some exemplary embodiments, as shown in fig. 2, the second clamping roller 32 includes a roller portion 321, a roller shaft portion 322 and a sliding connection portion 323, where the sliding connection portion 323 is connected to an end of the roller shaft portion 322 away from the roller portion 321, the sliding connection portion 323 is slidably disposed on the first sliding structure, and the sliding connection portion 323 is further connected to the movable member 3322, so that the second clamping roller 32 is driven by the movable member 3322 to move relative to the first clamping roller 31 in the first sliding structure.

The support seat 331 is used for providing a relatively stable support for the second clamping roller 32, and defines a moving direction of the second clamping roller 32 through the first sliding structure, so that a moving process of the second clamping roller 32 is more stable and reliable. The driving member 332 is used to drive the second pinch roller 32 to move, and the size of the gap between the second pinch roller 32 and the first pinch roller 31 can be controlled by the driving member 332 so as to control the pressure applied by the first pinch roller 31 and the second pinch roller 32 to the pole piece 200, thereby reducing the possibility that the pinch roller assembly 30 crushes the pole piece 200.

In some embodiments of the present application, as shown in fig. 2, the support base 331 further includes a second support arm 3312, where the second support arm 3312 is disposed opposite to the first support arm 3311, the second support arm 3312 is provided with a second sliding structure, and an end of the second clamping roller 32 facing away from the first support arm 3311 is slidably disposed in the second sliding structure.

The first support arm 3311 and the second support arm 3312 are arranged in parallel and at intervals, the first sliding structure and the second sliding structure are identical in shape and structure, and the first sliding structure and the second sliding structure may be arranged in a groove-like structure of a long bar shape extending in the first direction, or the first sliding structure and the second sliding structure are arranged in a long hole, and the length direction of the long hole is parallel to the first direction. Both ends of the second pinch roller 32 are slidably disposed in the first sliding structure and the second sliding structure, respectively, so that the second pinch roller 32 can move along the first direction relative to the support base 331, and the second pinch roller 32 is close to or far from the first pinch roller 31.

The first support arm 3311 and the second support arm 3312 support the two ends of the second clamping roller 32 respectively, so that the support of the second clamping roller 32 is more stable and reliable, and the possibility of loosening or vibrating the second clamping roller 32 when the second clamping roller 32 and the first clamping roller 31 clamp the pole piece 200 is reduced.

In some embodiments of the application, as shown in fig. 2, the drive member 332 comprises a power cylinder comprising a cylinder body, which is the drive 3321, and a piston rod, which is the movable member 3322.

The power cylinder is an actuator for converting hydraulic or pneumatic energy into mechanical energy and performing linear reciprocating motion, and comprises a cylinder body and a piston rod arranged on the cylinder body, and the piston rod is pushed to move by injecting liquid or gas into the cylinder body so as to drive the second clamping roller 32 to move. The power cylinder is classified into a hydraulic cylinder and a pneumatic cylinder according to the principle of providing pressure, and in the present embodiment, the power cylinder may be any one of the hydraulic cylinder and the pneumatic cylinder.

The power cylinder has the advantages of simple structure, reliable operation and the like. When the piston rod in the power cylinder reciprocates, no transmission gap exists, the motion is stable, the control precision is high, the pressure born by the pole piece 200 in the process of clamping the pole piece 200 by the first clamping roller 31 and the second clamping roller 32 is more stable, accurate and controllable, tension is provided for the pole piece 200 between the clamping roller assembly 30 and the tape connecting mechanism 20, and the possibility that the pole piece 200 is crushed by the clamping roller assembly 30 is further reduced.

In some embodiments of the present application, as shown in fig. 2, the number of driving members 332 is two, two driving members 332 are respectively provided on the first support arm 3311 and the second support arm 3312, and two movable members 3322 are respectively rotatably connected to both ends of the second nip roller 32.

The driving member 332 may be any one of a nut screw mechanism, a ball screw, an electric push rod, a pneumatic cylinder, a hydraulic cylinder, and the like.

In the present embodiment, the driving member 332 is a pneumatic cylinder, two pneumatic cylinders are respectively provided on the first support arm 3311 and the second support arm 3312, and piston rods of the two pneumatic cylinders are respectively rotatably connected to both ends of the second pinch roller 32. In some embodiments, the outer circumferential surface of the second clamping roller 32 near the two ends is sleeved with a bearing, and the piston rod is connected with the outer ring of the bearing, so that the piston rod is in rotary connection with the second clamping roller 32. In other embodiments, the end of the piston rod remote from the cylinder is connected to the second pinch roller 32 by a connection such as a bolt.

By arranging the two driving members 332, the second clamping roller 32 is pushed to move from two ends of the second clamping roller 32 respectively, so that the movement of the second clamping roller 32 is more stable, the two driving members 332 can limit the second clamping roller 32 at two ends of the second clamping roller 32 respectively, the gesture of the second clamping roller 32 can be adjusted through the cooperation of the two driving members 332, the inclination degree of the second clamping roller 32 relative to the first clamping roller 31 is reduced, and the pressure applied to the pole piece 200 by the first clamping roller 31 and the second clamping roller 32 is more uniform.

In some embodiments of the present application, as shown in fig. 1, 3 and 4, the cold pressing apparatus 100 further includes a receiving platform 40, where the receiving platform 40 is disposed below the unreeling shaft 11, and a side of the receiving platform 40 facing the unreeling mechanism 10 has a receiving surface 43 for receiving the pole piece 200.

The receiving platform 40 is a platform-shaped structure extending along a horizontal plane, the receiving platform 40 is located below the unreeling shaft 11, a receiving surface 43 for receiving the pole piece 200 is formed on one side of the receiving platform 40 facing upwards, and when the pole piece 200 is separated from the unreeling shaft 11, the pole piece falls onto the receiving surface 43 under the action of gravity.

By providing the receiving platform 40 below the unreeling mechanism 10, when the unreeling shaft 11 completely releases the pole piece 200, the receiving platform 40 is used for receiving the pole piece 200 falling from the unreeling shaft 11, so that the pole piece 200 cannot contact with the ground to cause pollution of the pole piece 200.

In some embodiments of the application, the receiving platform is a telescoping platform that is telescoping in the second direction; the second direction is perpendicular to the first direction.

The retractable platform is a platform capable of achieving retraction and extension in a second direction, the size of the receiving platform in the second direction in the retracted state being smaller than the size of the receiving platform in the second direction in the extended state.

The telescopic platform can be converted in two states of contraction and expansion, when the supporting platform is needed, the telescopic platform can be expanded, and when the supporting platform is not needed, the telescopic platform is contracted, so that the occupied space of the supporting platform is reduced.

In some embodiments of the present application, as shown in fig. 3, 4 and 5, the retractable platform includes a telescopic mechanism 41 and at least two baffles 42, the telescopic mechanism includes at least two telescopic units 411 that are sequentially connected and can be retracted along the second direction, the baffles 42 are connected to the telescopic units 411 in a one-to-one correspondence manner, the baffles 42 face a receiving surface 43 on one side of the unreeling mechanism 10, and all the baffles 42 can be retracted and moved along the second direction under the driving of the telescopic units 411.

The telescopic mechanism 41 includes at least two adjacent telescopic units 411, and one baffle plate 42 is disposed on each telescopic unit 411, specifically, the baffle plate 42 is indirectly connected to the telescopic unit 411 through a connecting member, and the connecting member is located between the baffle plate 42 and the telescopic unit 411 along the direction perpendicular to the receiving surface 43, so that the baffle plate 42 and the telescopic unit 411 have a receiving gap, and the telescopic unit 411 includes, but is not limited to, a linear motor module, a four-bar telescopic mechanism 41, and an air pressure or hydraulic telescopic mechanism 41 (such as a pneumatic cylinder, a hydraulic cylinder, and the like). In the direction perpendicular to the receiving surface 43 of the barrier 42, any two barriers 42 are spaced apart from each other, so that when the telescopic mechanism 41 is in the contracted state, the plurality of barriers 42 are stacked in order in the direction perpendicular to the receiving surface 43, and a part of the barriers 42 are accommodated in the accommodation gap between the other barrier 42 and the telescopic unit 411. When the telescopic mechanism 41 is in the extended state, the plurality of shutters 42 are sequentially expanded in a direction parallel to the receiving surface 43.

For example, in one exemplary embodiment, as shown in fig. 3, the telescopic unit 411 is a linear motor, the linear motor includes a linear guide 4111 and a mover seat 4112 slidably connected to the linear guide 4111, the linear guide 4111 is provided with a plurality of stators, the mover seat 4112 is provided with a mover matched with the stators, and when the linear guide 4111 is electrified, the stators interact with the mover, so as to drive the mover seat 4112 to make a linear motion on the linear guide 4111.

Specifically, as shown in fig. 3 and 5, when a plurality of linear motors are sequentially connected, one end of a linear guide rail 4111 of one linear motor is connected to a rotor seat 4112 of another linear motor, each linear motor is correspondingly provided with a baffle, the baffle is connected to the rotor seat 4112 through a connecting member 4113, the connecting member 4113 may be a column member, and the baffle is connected to the rotor seat 4112 by bonding or welding. Or screw holes are formed in the connecting piece 4113, through holes are formed in the baffle plates respectively, and bolts penetrate through the through holes and extend into the screw holes to fix the baffle plates on the rotor seat 4112. Specifically, along the length direction of the linear guide 4111, one side edge near the baffle is connected to the connector 4113. The connecting member 4113 is located between the shutter 42 and the expansion unit 411 in a direction perpendicular to the receiving surface 43, so that the shutter 42 and the expansion unit 411 have the accommodation gap 401. When any two adjacent rotor seats 4112 approach each other, the telescopic mechanism 41 is in a contracted state, the plurality of shutters 42 are sequentially stacked in a direction perpendicular to the receiving surface 43, and part of the shutters 42 are accommodated in the accommodation gap 401 between the other shutters 42 and the telescopic unit 411. When any two adjacent rotor seats 4112 are far away from each other, the telescopic mechanism 41 is in an extended state, and the plurality of baffles 42 are sequentially unfolded along the direction parallel to the receiving surface 43.

The telescopic mechanism 41 can be converted in two states of contraction and expansion, when the receiving platform 40 is required to be used, the telescopic mechanism 41 can be expanded, and when the receiving platform 40 is not required to be used, the telescopic mechanism 41 is contracted, so that the occupied space of the receiving platform 40 is reduced.

In some embodiments of the present application, as shown in fig. 5, the receiving surface 43 is configured as a flat or curved surface.

When the pole piece 200 contacts the receiving surface 43 and slides on the receiving surface 43, the planar or curved surface of the receiving surface 43 may reduce the possibility of scratching the pole piece 200 due to sliding friction.

In some embodiments of the present application, as shown in fig. 1 and 5, the receiving surface 43 is a plane, and the second direction is a horizontal direction or is disposed at an angle to the horizontal direction.

The receiving surface 43 is not strictly perpendicular to the horizontal direction, and due to assembly errors or limitation of the internal space of the cold pressing apparatus 100, an included angle between the receiving surface 43 and the horizontal direction may be set, and the included angle between the receiving surface 43 and the horizontal direction is smaller than 90 °. Preferably, the bearing surface 43 is inclined at an angle of less than 10 ° to the horizontal.

The receiving surface 43 extends along the horizontal direction or forms an included angle with the horizontal direction, so that the contact area between the pole piece 200 and the receiving surface 43 and the sliding distance between the pole piece 200 and the receiving surface 43 are increased, and the possibility that the pole piece 200 contacts the ground is reduced.

In some embodiments of the present application, as shown in fig. 1, the cold pressing apparatus 100 further includes a cold pressing mechanism 50, the cold pressing mechanism 50 is disposed between the unreeling mechanism 10 and the pinch roller assembly 30, and the pole piece 200 is moved to the pinch roller assembly 30 after being cold pressed by the cold pressing mechanism 50.

The cold pressing mechanism 50 includes a first press roller 51 and a second press roller 52 disposed up and down, and a gap between the first press roller 51 and the second press roller 52 is smaller than a thickness of the pole piece 200 after the coating process is completed, so that the coating material on the pole piece 200 is compacted by the two press rollers when the pole piece 200 passes through the gap between the two press rollers.

The cold pressing mechanism 50 is used for performing a cold pressing process on the pole piece 200, compacting a coating material of the pole piece 200, reducing the volume of the pole piece 200, and improving the energy density of the battery.

In some embodiments of the present application, as shown in fig. 1, the cold press apparatus 100 further comprises a first set of guide rollers 61, the first set of guide rollers 61 being provided between the unreeling mechanism 10 and the cold press mechanism 50, the first set of guide rollers 61 comprising at least one guide roller 601.

The first guide roller set 61 includes two guide rollers 601, and the pole piece 200 is released from the unreeling shaft 11, guided by the two guide rollers 601 in sequence, and then passes between the two press rollers of the cold press mechanism 50. The guide rollers 601 in the first guide roller set 61 are used to support and guide the pole piece 200, so that the pole piece 200 can be moved from the unreeling mechanism 10 to the cold press mechanism 50 more smoothly.

In some embodiments of the present application, as shown in fig. 1, the cold press apparatus 100 further comprises a second guide roller set 62, the second guide roller set 62 being provided between the unreeling mechanism 10 and the taping mechanism 20, the second guide roller set 62 comprising at least one guide roller 601.

The second guide roller set 62 includes two guide rollers 601, and the pole piece 200 is guided by the two guide rollers 601 in sequence between the first pinch roller 31 and the second pinch roller 32 of the pinch roller assembly 30 after being cold-pressed by the cold pressing mechanism 50. The guide rollers 601 in the second guide roller set 62 are used to support and guide the pole piece 200 so that the pole piece 200 can be moved from the cold press mechanism 50 to the pinch roller assembly 30 more smoothly.

In some embodiments of the present application, the outer circumferential surface of the first nip roller 31 is coated with an elastic laminate; and/or, the outer circumferential surface of the second nip roller 32 is covered with an elastic lamination.

The elastic lamination is specifically a film layer made of elastic materials such as rubber, and the elastic lamination is coated outside the first clamping roller 31 and the second clamping roller 32, so that buffering can be provided when the first clamping roller 31 and the second clamping roller 32 clamp the pole piece 200.

By providing an elastic lamination on the outer peripheral surface of the first nip roller 31 or the second nip roller 32, the possibility of the first nip roller 31 and the second nip roller 32 generating an indentation on the pole piece 200 when the pole piece 200 is pressed is reduced.

According to an embodiment of the present invention, as shown in fig. 1 to 5, a cold pressing apparatus 100 is provided, and the cold pressing apparatus 100 includes an unreeling mechanism 10, a first guide roller set 61, a cold pressing mechanism 50, a second guide roller set 62, a pinch roller assembly 30, a tape splicing mechanism 20, and a reeling mechanism, which are sequentially disposed along a direction in which a pole piece 200 moves. The unreeling mechanism 10 is used for winding the pole piece 200 to be subjected to cold-pressing treatment, and the pole piece 200 unreeled by the unreeling mechanism 10 sequentially passes through the first guide roller set 61, the cold-pressing mechanism 50, the second guide roller set 62, the clamping roller assembly 30 and the tape receiving mechanism 20 to a reeling mechanism, and the reeling mechanism winds the pole piece 200 after the cold-pressing procedure is completed. The clamping roller assembly 30 includes a first clamping roller 31 and a second clamping roller 32 disposed in parallel, and the first clamping roller 31 and the second clamping roller 32 are used for clamping the pole piece 200. Specifically, before the winding diameter of the wound pole piece 200 on the unwinding shaft 11 reaches the set protection winding diameter value, that is, when the winding diameter is greater than the protection winding diameter value, the cold pressing device 100 performs a normal cold pressing process, the size of the gap between the first clamping roller 31 and the second clamping roller 32 is greater than the thickness of the pole piece 200, so that the pole piece 200 is separated from the contact state with the first clamping roller 31 and the second clamping roller 32, and the clamping roller assembly 30 does not clamp the pole piece 200 at this time, so that the obstruction of the clamping roller assembly 30 to the pole piece 200 is reduced; after the winding diameter of the wound pole piece 200 on the unwinding shaft 11 reaches the set protection winding diameter value, that is, when the winding diameter is smaller than or equal to the protection winding diameter value, the cold pressing equipment 100 automatically slows down, reduces the moving speed of the pole piece 200, then enables the first clamping roller 31 and the second clamping roller 32 to clamp the pole piece 200 so as to realize tension separation of the pole piece 200 before and after the clamping roller assembly 30, and when the unwinding mechanism 10 is completed and the pole piece 200 is separated from the unwinding mechanism 10, the pole piece 200 between the clamping roller assembly and the tape receiving mechanism 20 still keeps tension, so that part of the pole piece 200 between the unwinding mechanism 10 and the clamping roller assembly 30 can still be effectively utilized, thereby reducing the fixed loss of each winding of the pole piece 200, improving the coating efficiency of the pole piece 200 and reducing the manufacturing cost of a battery.

In the present embodiment, the pressure applied to the pole piece 200 between the first nip roller 31 and the second nip roller 32 is in the range of 0.2Mpa to 0.4Mpa, so that the possibility of flying and crush during unreeling is reduced.

Further, the outer peripheral surfaces of the first clamping roller 31 and the second clamping roller 32 are also sleeved with rubber sleeves, so that the possibility of generating an indentation on the pole piece 200 when the pole piece 200 is clamped by the first clamping roller 31 and the second clamping roller 32 is reduced.

In this embodiment, the cold pressing apparatus 100 further includes a receiving platform 40, where the receiving platform 40 is disposed below the unwinding shaft 11, and the receiving platform 40 can stretch out and draw back along a horizontal direction, and when the unwinding shaft 11 completely releases the pole piece 200, the receiving platform 40 is used to receive the pole piece 200 falling from the unwinding shaft 11, so that the pole piece 200 will not contact with the ground to cause pollution of the pole piece 200.

According to some embodiments of the present application, a second aspect of the present application provides a battery production line comprising a cold press apparatus 100 according to the first aspect of the embodiment.

The battery production line provided by the embodiment of the second aspect of the present application may further include a coating device, a drying device, a winding device, etc., and since the coating device, the drying device, the winding device, etc. include the cold pressing device 100 according to the embodiment of the first aspect, the present application also has the technical effects of any of the above embodiments, and will not be described herein.

The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (17)

1. A cold pressing apparatus, characterized in that the cold pressing apparatus comprises:

The unreeling mechanism comprises an unreeling shaft, and the unreeling shaft is used for unreeling the pole piece to be subjected to cold-pressing treatment;

the tape connecting mechanism is arranged at one side of the unreeling mechanism;

The clamping roller assembly is arranged between the unreeling mechanism and the tape receiving mechanism and comprises a first clamping roller and a second clamping roller which are arranged in parallel, a pole piece unreeled by the unreeling shaft can pass through a gap between the first clamping roller and the second clamping roller and enter the tape receiving mechanism, and the first clamping roller and the second clamping roller are configured to apply clamping force to the pole piece.

2. The cold press apparatus of claim 1, wherein the pinch roller assembly further comprises a movable mechanism having a movable member movable in a first direction, the movable member being coupled to the second pinch roller to drive the second pinch roller toward or away from the first pinch roller, the first direction intersecting an axis of the first pinch roller and an axis of the second pinch roller, respectively.

3. Cold pressing apparatus according to claim 2, wherein,

And along a second direction, the distance between the unreeling mechanism and the clamping roller assembly is H, and the distance between the clamping roller assembly and the tape connecting mechanism is L, wherein L is smaller than H, and the second direction is perpendicular to the first direction.

4. The cold press apparatus according to claim 2, wherein the movable mechanism comprises:

The support seat comprises a first support arm, a first sliding structure is arranged on the first support arm, and one end of the second clamping roller is slidably arranged on the first sliding structure;

The driving component comprises a driving piece and the movable piece in transmission connection with the driving piece, and the driving piece is used for driving the movable piece to move along the first direction.

5. The cold press apparatus according to claim 4, wherein the support base further comprises a second support arm disposed opposite to the first support arm, the second support arm being provided with a second sliding structure, an end of the second pinch roller facing away from the first support arm being slidably disposed in the second sliding structure.

6. The cold press apparatus according to claim 5, wherein the drive member comprises a power cylinder comprising a cylinder body and a piston rod, the cylinder body being the drive member and the piston rod being the movable member.

7. A cold pressing apparatus according to claim 5, wherein,

The number of the driving members is two, the two driving members are respectively arranged on the first supporting arm and the second supporting arm, and the two movable pieces are respectively connected with two ends of the second clamping roller.

8. The cold pressing apparatus according to claim 2, further comprising a receiving platform provided below the unreeling shaft, the receiving platform having a receiving surface for receiving the pole piece on a side thereof facing the unreeling mechanism.

9. The cold press apparatus according to claim 8, wherein,

The bearing platform is a telescopic platform, the telescopic platform can stretch along a second direction, and the second direction is perpendicular to the first direction.

10. The cold press apparatus of claim 9, wherein the telescoping platform comprises:

the telescopic mechanism comprises at least two telescopic units which are connected in sequence and can stretch and retract along the second direction;

The baffles are connected with the telescopic units in a one-to-one correspondence manner, the baffles face one side surface of the unreeling mechanism to form the bearing surface, and all the baffles can stretch and retract along the second direction under the drive of the telescopic units.

11. Cold pressing apparatus according to claim 10, wherein the receiving surface is configured as a plane or a curved surface.

12. Cold pressing apparatus according to claim 10, wherein,

The bearing surface is a plane, and the second direction is a horizontal direction or forms an included angle with the horizontal direction.

13. The cold pressing apparatus of claim 1, further comprising a cold pressing mechanism disposed between the unreeling mechanism and the pinch roller assembly, the cold pressing mechanism configured to cold press the pole piece.

14. The cold press apparatus of claim 13, further comprising a first set of guide rollers disposed between the unreeling mechanism and the cold press mechanism, the first set of guide rollers comprising at least one guide roller.

15. Cold press device according to any one of claims 1 to 14, further comprising a second set of guide rollers arranged between the unreeling mechanism and the taping mechanism, the second set of guide rollers comprising at least one guide roller.

16. Cold pressing apparatus according to any of claims 1 to 14, wherein,

The outer peripheral surface of the first clamping roller is coated with an elastic pressing layer;

And/or the outer peripheral surface of the second clamping roller is coated with an elastic pressing layer.

17. A battery production line, characterized by comprising a cold press plant according to any one of claims 1 to 16.