CN115818367A

CN115818367A - Winding drum, film layer winding device and battery processing system

Info

Publication number: CN115818367A
Application number: CN202211403145.7A
Authority: CN
Inventors: 彭卓
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-03-21
Also published as: WO2024099005A1

Abstract

The invention discloses a winding drum, a film layer winding device and a battery processing system, wherein the winding drum comprises a drum body and a clamping assembly, and a first clamping surface is formed on the drum body; the clamping assembly is movably arranged on the cylinder body between a closed position and an open position; the clamping assembly is provided with a second clamping surface; when the clamping assembly is in the opening position, a gap for the film layer to at least partially enter is formed between the first clamping surface and the second clamping surface; when the clamping assembly is in the closed position, the first clamping surface and the second clamping surface are clamped with each other. The film layer is clamped and fixed between the first clamping surface and the second clamping surface, so that the film layer and the cylinder body are fixed with each other; because the connection is carried out without adopting a bonding process, the waste caused by using bonding materials can be avoided.

Description

Winding drum, film layer winding device and battery processing system

Technical Field

The invention relates to a winding drum, a film layer winding device and a battery processing system.

Background

In the process of processing the power battery, a large amount of film covering or film layer winding processes are needed. Taking the film coating process as an example, when the film coating process is performed, the film layer is usually directly bonded to the surface of the reel in order to fix the film layer, and a large amount of bonding material is wasted.

Disclosure of Invention

The invention mainly aims to provide a winding drum, and aims to solve the problem of waste of bonding materials in the existing film layer fixing process.

In order to achieve the above object, the present invention provides a roll for holding a film, the roll comprising:

the clamping device comprises a cylinder body, a clamping device and a clamping device, wherein a first clamping surface is formed on the cylinder body; and

the clamping assembly is movably arranged on the barrel between a closed position and an open position; the clamping assembly is provided with a second clamping surface; when the clamping assembly is in the opening position, a gap for the film layer to at least partially enter is formed between the first clamping surface and the second clamping surface; when the clamping assembly is in the closed position, the first clamping surface and the second clamping surface are clamped with each other.

The film layer is clamped and fixed by the first clamping surface and the second clamping surface, and then the film layer and the cylinder body are fixed mutually; because the connection is carried out without adopting a bonding process, the waste caused by using bonding materials can be avoided.

In some examples, the clamping assembly includes:

the pressing rod is provided with the second clamping surface; and

the connecting rod is movably arranged on the cylinder and is connected with the pressing bar, so that the connecting rod can drive the pressing bar to move between the closed position and the open position.

The film layer is limited between the first clamping surface and the second clamping surface; the connecting rod is used for driving the pressing rod to move so that the pressing rod can be switched between a closed position and an open position, and then clamping and fixing of the film layer are achieved.

In some examples, the cylinder is provided with a guide hole, and one end of the guide hole penetrates through the peripheral wall of the cylinder; the connecting rod penetrates through the guide hole and can reciprocate along the guide hole, so that the connecting rod can drive the pressing rod to move between the closed position and the open position.

The connecting rod is guided through the guide hole, so that the connecting rod can move along the track formed by the guide hole, the connecting rod drives the pressing rod to move along the preset track, the pressing rod is limited, the relative constancy of the pressing rod and the matching position of the barrel can be improved, and the stability of the clamping assembly in clamping a film layer is improved.

In some examples, the clamping assembly further comprises:

the first elastic piece is arranged in the guide hole, and the first elastic piece is respectively connected with the cylinder body and the connecting rod and used for generating acting force for elastically drawing the connecting rod into the guide hole.

First elastic component is used for playing the traction to the connecting rod for the connecting rod can receive the elastic force effect, and then has the trend that drives the pressure bar and remove to the closed position, so that the rete can be pressed the thick stick centre gripping on the barrel, realizes the relatively fixed of rete.

In some examples, the barrel has a hollow;

one end, far away from the peripheral wall of the cylinder, of the guide hole penetrates through the hollow part;

the first elastic member is connected to an inner wall surface of the hollow portion.

Through being connected one end of first elastic component with well kenozooecium, can make things convenient for the installation and the fixed of first elastic component, make it have bigger installation space.

In some examples, the first elastic member includes:

a connecting member connected to an inner wall surface of the hollow portion; and

and one end of the first spring is connected with the connecting piece, and the other end of the first spring is connected with the connecting rod.

The first spring is fixed on the cylinder through the connecting piece, so that the first spring and the cylinder are fixed relatively.

In some examples, the first spring is sleeved on the periphery of the connecting rod and extends along the length direction of the connecting rod.

First spring is hollow helical structure, and the connecting rod is located the cavity position of first spring to make first spring can set up along the length direction of connecting rod, make things convenient for the installation and the fixing of first spring, reduce the shared space of first spring simultaneously.

In some examples, the connecting member is sleeved on the periphery of the connecting rod, and the maximum outer peripheral diameter of the connecting member is larger than the inner diameter of the guide hole.

The connecting piece is used for fixing first spring, and when the biggest periphery diameter of connecting piece was greater than the internal diameter of guiding hole, the connecting piece can not move to guiding hole inside, and then can fix the tip of first spring to the tip that makes first spring be close to the one end of connecting piece keeps presetting the position.

In some examples, a first limiting groove is concavely arranged on the inner wall surface of the hollow part, and one end, away from the outer peripheral wall of the cylinder body, of the guide hole penetrates to the groove bottom of the first limiting groove; the connecting piece is arranged in the first limiting groove.

First spacing groove is used for spacing the connecting piece to prevent that the radial removal along the guiding hole from appearing in the connecting piece, and then prevent that unnecessary dislocation from appearing in the clamping component.

In some examples, a limiting convex part is convexly arranged on the peripheral wall of one end, close to the pressing rod, of the connecting rod, and the maximum peripheral diameter of the limiting convex part is larger than the inner diameter of the guide hole.

The limiting convex part is arranged on the peripheral wall of the connecting rod in a protruding mode, and the maximum peripheral diameter of the limiting convex part is larger than the inner diameter of the guide hole, so that the limiting convex part can be used for limiting the maximum depth of the connecting rod inserted into the guide hole.

In some examples, a second limiting groove is formed in the outer peripheral wall of the cylinder, and one end, away from the outer peripheral wall of the cylinder, of the guide hole penetrates to the bottom of the second limiting groove; when the pressing bar is located at the closed position, the limiting convex part is embedded into the second limiting groove.

The second limit groove is formed to form a space for accommodating the limit convex part, so that the limit convex part can be limited at the position recessed on the outer peripheral wall of the cylinder body. When the pressing bar is in a closed position, the second clamping surface and the first clamping surface are at least partially attached to each other, and the limiting convex part does not block the movement of the pressing bar.

In some examples, an end of the first spring, which is away from the connecting piece, is connected with the limit protrusion.

Because spacing convex part protrusion sets up on the periphery wall of connecting rod for the one end that the connecting piece was kept away from to first spring can be connected with spacing convex part after extending to spacing convex part department along the extending direction of connecting rod, and then can make things convenient for the reciprocal anchorage of first spring and connecting rod, makes the connecting rod can receive the elastic force effect of first spring.

In some examples, the clamping assembly further comprises a first driving member in driving connection with an end of the link remote from the pressure bar for driving the link to move the pressure bar between the closed position and the open position.

The first driving piece is used for driving the connecting rod to move relatively, and then the connecting rod can play a role in drawing the pressing bar in the axial movement process along the guide hole, so that the pressing bar can be switched between a closed position and an open position, and further automatic switching of the position of the pressing bar is realized.

In some examples, the first drive member is a cylinder or an air shaft.

The connecting rod is pushed to move along the axial direction by the air cylinder or the air expansion shaft, and then the synchronous movement of the pressing bar is realized, so that the position switching of the pressing bar can be realized.

In some examples, the outer circumferential wall of the barrel is concavely provided with a positioning groove, and the first clamping surface is formed in the positioning groove.

Through setting up the constant head tank for when pressing the thick stick to remove to the closed position, press the thick stick to be located the constant head tank partially at least, and then prevent to press the thick stick protrusion outside the reel and lead to the damage to the rete of coiling on the reel.

In some examples, the guide hole is disposed through to the positioning slot.

The guiding hole is used for guiding the connecting rod, and the connecting rod is communicated to the positioning groove through the guiding hole, so that one end, away from the axis of the winding drum, of the connecting rod is also located in the positioning groove, and interference of the connecting rod on a film layer wound on the winding drum when the connecting rod protrudes out of the peripheral wall of the winding drum is avoided.

In some examples, the link has a proximal end for connecting to the pressure bar and a distal end distal from the pressure bar;

the barrel is provided with a positioning shaft, the connecting rod is rotatably connected with the positioning shaft, and the positioning shaft is positioned between the near end and the far end of the connecting rod;

the reel further comprises a second elastic member; the far end of the connecting rod is connected with the cylinder body through the second elastic piece, so that the second elastic piece generates acting force for drawing the near end of the connecting rod and the pressing rod towards the direction of the first clamping face.

The connecting rod rotates with the location axle to make the connecting rod and the location axle cooperate, form similar lever mechanism, when the distal end extrusion second elastic component of connecting rod, the second elastic component can play the elastic force effect to the connecting rod, and then makes the relative location axle rotation of distal end of connecting rod, and drives and presses thick stick synchronous motion, realizes pressing the position switching of thick stick.

In some examples, the clamping assembly further includes a second drive member drivingly connected to the distal end of the link for driving the link to rotate about the positioning shaft.

The connecting rod is driven to rotate relative to the positioning shaft by the second driving piece, so that relative movement of the connecting rod is realized, and the connecting rod can drive the pressing rod to move between the opening position and the closing position.

In some examples, the clamp assembly further comprises a third drive member disposed on the barrel;

the connecting rod includes:

the rocker is in driving connection with the third driving piece;

the driving rod is rotatably connected with one end of the rocker, which is far away from the third driving piece; and

one end of the driven rod is rotatably connected with the cylinder, and the other end of the driven rod is connected with the pressing rod and one end of the driving rod, which is far away from the rocker; the third driving piece is used for driving the rocker, the active rod and the rocker so as to enable the pressing rod to move between the opening position and the closing position.

The rocker, the driving rod and the driven rod form a connecting rod mechanism, and the third driving piece is used for driving the connecting rod mechanism to move relatively, so that the connecting rod mechanism can drive the pressing rod to move between the opening position and the closing position.

In some examples, a third limiting groove is concavely arranged on the cylinder, and the inner wall surface of the third limiting groove forms the first clamping surface; the connecting rods are arranged at two axial ends of the cylinder body.

The third spacing groove is used for forming an inwards concave area for accommodating the pressing bar, when the pressing bar is in a closed position, at least part of the pressing bar is located in the third spacing groove, and therefore the film layer is prevented from being damaged when the pressing bar protrudes out of the peripheral wall of the barrel.

The present example also proposes, on the basis of the above-described example of the roll, an example of a film layer winding apparatus for winding a film layer, the film layer winding apparatus including:

a main winding member for winding the film;

a spool as in any preceding example, disposed adjacent to the primary winding member; and

the auxiliary shaft is movably arranged between the main winding piece and the winding drum; the auxiliary shaft is used for pushing the film layer output by the main winding piece to the barrel, so that the film layer can be embedded in a gap between the first clamping surface and the second clamping surface.

The rete is convoluteed on main coiling piece, and when the auxiliary shaft supported the rete and pushed to the barrel, can compress tightly the rete part on the barrel through the centre gripping subassembly, and then realize fixing the rete to the reel.

The present example further provides a battery processing system based on the film layer winding device, including the film layer winding device according to the above example.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a front view of an example of the roll of the present invention;

FIG. 2 is a left side view of an example of the roll of the invention;

FIG. 3 is a cross-sectional view taken along line 2a-2a of FIG. 2;

FIG. 4 is a partial enlarged view of the portion 3b in FIG. 3;

FIG. 5 is a front view of an example of a cartridge of the present invention;

FIG. 6 is a left side view of an example of the cartridge of the present invention;

FIG. 7 is a cross-sectional view taken along line 6a-6a of FIG. 6;

FIG. 8 is a schematic view showing an example of a state where a pressing bar is engaged with a link according to the present invention;

FIG. 9 is a schematic view showing an example of a first elastic member according to the present invention;

FIG. 10 is a schematic structural view of another example of the roll of the present invention;

FIG. 11 is a front view of FIG. 10;

FIG. 12 is a right side view of FIG. 10;

FIG. 13 is a schematic structural view of another example of a cartridge according to the present invention;

FIG. 14 is a right side view of FIG. 13;

FIG. 15 is a schematic view showing another example of the engagement state of the pressing bar and the link according to the present invention;

FIG. 16 is a schematic view of a further example of the roll holding assembly of the present invention in an open position;

FIG. 17 is a front view of FIG. 16;

FIG. 18 is a right side view of FIG. 16;

FIG. 19 is a schematic view showing the structure of an example of the film winding apparatus of the present invention;

FIG. 20 is a schematic view showing the structure of another example of the film winding apparatus of the present invention;

FIG. 21 is a schematic view of an exemplary clamping assembly of the film winding apparatus of the present invention in an open position;

fig. 22 is a schematic view showing an example of the holding member of the film winding apparatus of the present invention in the closed position.

The reference numbers indicate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; etc.) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The power battery can be divided into a disposable battery and a rechargeable battery according to whether the power battery is rechargeable or not. Types of rechargeable batteries that are common today are: lead-acid batteries, nickel-metal hydride batteries, and lithium ion batteries. Lithium ion batteries are currently widely used in pure electric vehicles and hybrid electric vehicles, and the lithium ion batteries used for such purposes have relatively low capacity, but have large output and charging currents and long service life.

The lithium ion battery is a complex system and comprises a shell, and a positive electrode, a negative electrode, a diaphragm, a current collector, a binder, a conductive agent and the like which are arranged in the shell. The shell of the battery is provided with a liquid injection hole for injecting electrolyte into the battery; the electrolyte is used to conduct ions between the positive and negative electrodes of the lithium battery. In the process of charging and discharging the battery, the involved reactions include electrochemical reaction of the positive and negative electrodes, lithium ion conduction and electron conduction, heat diffusion and the like. The production process flow of the lithium battery is long, and a plurality of working procedures are involved in the production process.

The lithium battery can be divided into a cylindrical battery, a square battery, a soft package battery and the like according to forms, the production process of the lithium battery has certain difference, and the lithium battery manufacturing process can be divided into a front section process (pole piece manufacturing), a middle section process (battery core synthesis) and a rear section process (formation encapsulation) on the whole.

There are many processes that need to carry out tectorial membrane or membranous layer winding in the lithium cell course of working. Wherein, outside the shell, the external film covering process requirement is met; in the process of processing the battery core, film layer winding requirements such as pole piece winding and the like exist. For convenience of description, the film or the electrode sheet having the film-like structure is hereinafter generally referred to as a film layer.

In order to facilitate the winding of the film, in some scenarios, a worker needs to fix the end of the film to the winding drum by adhering the film to the winding drum so that the end of the film can be fixed to the winding drum, and then wind the film onto the winding drum.

When the bonding and fixing process is adopted, a large amount of materials such as bonding agents or adhesive tapes are needed to fix the film layers, so that the connecting materials are wasted. Because the film layer is required to be connected with the winding drum, in order to prevent the film layer from falling off, the total length of the bonding part of the materials of the adhesive such as the adhesive tape and the like cannot be too short, and then the adhesive occupies the film layer at one very long end, so that the film layer is wasted. Because the adhesive tape is provided with the glue, the glue is attached to the winding drum, and the winding drum is easily polluted.

Referring to fig. 1 and 2, the present invention provides a roll, which aims at the problems of waste of adhesive material and waste of the film 100 caused by the adhesion of the film 100 in the conventional roll. The winding drum is used for clamping the film layer 100, and comprises a drum body 20 and a clamping assembly 30 arranged on the drum body 20, wherein a first clamping surface 21 is formed on the drum body 20; the clamp assembly 30 is movable between a closed position and an open position; the clamping assembly 30 has a second clamping surface 32; when the clamping assembly 30 is in the open position, a gap for the film 100 to at least partially enter is formed between the first clamping surface 21 and the second clamping surface 32; when the clamping assembly 30 is in the closed position, the first clamping surface 21 and the second clamping surface 32 are clamped to each other.

The cylinder 20 has a cylindrical shape, the cylinder 20 has a circumferential wall having a circular shape as shown in fig. 2, and when the film 100 is wound on the cylinder 20, the film 100 is wound on the circumferential wall of the cylinder 20 centering on the axis of the cylinder 20. The cylinder 20 is provided with a first clamping surface 21, and when the film 100 is wound on the cylinder 20, the end of the film 100 is at least partially pressed onto the first clamping surface 21 by the second clamping surface 32.

A clamp assembly 30 is coupled to the barrel 20 and the clamp assembly 30 is movable between an open position and a closed position, the clamp assembly 30 having a second clamp surface 32. Film layer 100 has an end for mating with clamping assembly 30. The open position means that a gap is formed between the second clamping surface 32 of the clamping assembly 30 and the first clamping surface 21 of the cylinder 20, and the width of the gap is slightly larger than the thickness of the end of the film 100, so that the film 100 can enter between the first clamping surface 21 and the second clamping surface 32. The closed position refers to a small distance between the first clamping surface 21 and the second clamping surface 32, so that the first clamping surface 21 and the second clamping surface 32 are attached to each other and clamped, or a gap is formed between the first clamping surface 21 and the second clamping surface 32, and the thickness of the gap is smaller than that of the film layer 100.

The clamping assembly 30 is movable relative to the barrel 20 such that the distance between the second clamping surface 32 of the clamping assembly 30 and the first clamping surface 21 of the barrel 20 is adjustable. Clamping assembly 30 is switchable between an open position and a closed position such that the gap between first clamping surface 21 and second clamping surface 32 may change as clamping assembly 30 moves. When clamping assembly 30 is in the open position, the gap between first clamping surface 21 and second clamping surface 32 is sufficient for film 100 to be placed therebetween, and when clamping assembly 30 is made to drive film 100 to synchronously move toward the closed position, the distance between second clamping surface 32 and first clamping surface 21 is reduced until film 100 is clamped between first clamping surface 21 and second clamping surface 32.

When the film layer 100 is not wound on the cylinder 20, the clamping assembly 30 is in the closed position, and the first clamping surface 21 and the second clamping surface 32 are tightly attached to each other, or the width of the gap between the first clamping surface 21 and the second clamping surface 32 is in a minimum state.

Because the movable clamping assembly 30 is adopted to limit the film layer 100, the film layer 100 is clamped on the outer wall of the barrel 20, and the film layer 100 is not required to be fixed by additionally adopting adhesive structures such as adhesive tapes and the like, so that the waste of materials such as the adhesive tapes is avoided. Since only a partial structure of the end portion of the film 100 needs to be clamped between the first clamping surface 21 and the second clamping surface 32, the portion of the film 100 not in contact with the clamping assembly 30 is not affected, and thus the waste of the film 100 caused in the existing long-distance adhesive tape bonding process can be avoided. Since no material containing glue is required, contamination of the roll or film 100 can be avoided

In some examples, the clamping assembly 30 is used to clamp a partial structure of the end of the film 100, for example, the clamping assembly 30 clamps both ends of the end of the film 100 in the width direction between the first clamping surface 21 and the second clamping surface 32, or the clamping assembly 30 clamps a middle position of the end of the film 100 in the width direction between the first clamping surface 21 and the second clamping surface 32. In some examples, the clamping assembly 30 clamps the end of the film ply 100 entirely between the first clamping face 21 and the second clamping face 32. The first clamping surface 21 and the second clamping surface 32 extend along the width direction of the film layer 100, so that the end of the film layer 100 is integrally located between the first clamping surface 21 and the second clamping surface 32.

In some examples, the first clamping surface 21 is a localized location on the circular peripheral wall of the barrel 20. In some examples, a groove is concavely provided on the outer circumferential wall of the cylinder 20, and the first clamping surface 21 is formed in the groove. In some examples, a protruding structure is protruded on the outer peripheral wall of the cylinder 20, and the first clamping surface 21 is a partial surface of the protruding structure.

In some examples, the outer circumferential wall of the barrel 20 is recessed with a groove, the first clamping surface 21 is formed in the groove, the second clamping surface 32 of the clamping assembly 30 is located in the groove when the clamping assembly 30 is in the closed position, and the clamping assembly 30 may be located inside the outer circumferential edge of the barrel 20 when projected in a plane perpendicular to the axial direction of the barrel 20, so that the clamping assembly 30 does not protrude outside the outer circumferential wall of the barrel 20.

In some examples, the cartridge 20 is hollow to reduce the weight of the cartridge 20 while reducing the material required for the cartridge 20. The hollow portion of the cylinder 20 may be located at the middle of the cylinder 20, that is, as shown in fig. 2, the cylinder 20 is provided with a hollow portion 23, in order to make the center of gravity of the cylinder 20 coincide with the axis center thereof, the length direction of the hollow portion 23 extends along the axial direction of the cylinder 20, and the hollow portion 23 coincides with the axis of the cylinder 20.

Referring to fig. 2, 3 and 4, in some examples, the clamping assembly 30 includes a pressing bar 31 and a link 33, the pressing bar 31 being formed with a second clamping surface 32; the connecting rod 33 is movably arranged on the cylinder 20 and connected with the pressing rod 31, so that the connecting rod 33 can drive the pressing rod 31 to move between a closed position and an open position.

The pressing rod 31 is used for matching with the cylinder 20 and clamping the film layer 100; the connecting rod 33 is used for moving the pressing rod 31 relative to the barrel 20, so that the pressing rod 31 can move between the closed position and the open position, and further the pressing rod 31 can be used for clamping the film 100, and the film 100 can be fixed on the winding drum.

The connecting rod 33 is movably connected with the cylinder 20, so that the connecting rod 33 can move along a preset track, and when the connecting rod 33 moves along the preset track, the connecting rod 33 drives the pressing rod 31 to move synchronously, so that the pressing rod 31 can be switched between an open position and a closed position along the preset track.

The preset track may be a radial direction of the barrel 20, that is, the preset track is a straight line; as shown in fig. 2 for example, the pressing bar 31 is moved in a direction away from the outer peripheral wall of the cylinder 20 in the radial direction of the cylinder 20 from the outer peripheral wall of the drum to switch to the open position, and the pressing bar 31 is moved in a direction closer to the outer peripheral wall of the cylinder 20 in the radial direction of the cylinder 20 to switch to the closed position. In some examples, the predetermined trajectory may also be a curved line or a broken line, so that the pressing rod 31 can move relatively close to or away from the outer circumferential wall of the barrel 20.

In some examples, a driving means for driving the link 33 to move along a predetermined trajectory is provided on the cylinder 20. When the connecting rod 33 moves relative to the cylinder 20, an air cylinder, a motor or other structures capable of driving the connecting rod 33 to move can be adopted as the driving device.

Referring to fig. 5, 6 and 7, in some examples, the cylinder 20 is provided with a guide hole 22, and one end of the guide hole 22 penetrates through the outer circumferential wall of the cylinder 20; the link 33 is disposed through the guide hole 22 and can reciprocate along the guide hole 22, so that the link 33 can move the pressing bar 31 between the closed position and the open position.

The guide hole 22 has a first end penetrating to the outer peripheral wall of the cylinder 20, and the link 33 is inserted into the guide hole 22 from the first end of the guide hole 22 and is capable of reciprocating in the axial direction of the guide hole 22 so as to be capable of bringing the pressing lever 31 to switch between the open position and the closed position.

The guiding hole 22 may be a blind hole formed on the cylinder 20, or may be a through hole formed on the cylinder 20. When the cylinder 20 has the hollow portion 23 as described in the above examples, the guide hole 22 may communicate with the hollow portion 23.

Through setting up guiding hole 22, can carry on spacingly to connecting rod 33 to make connecting rod 33 can remove according to the orbit that guiding hole 22 formed, and then can restrict the orbit of pressing thick stick 31, make to press thick stick 31 to cooperate with barrel 20 better, avoid first clamping face 21 and second clamping face 32 dislocation to appear, and then help promoting the butt joint precision of first clamping face 21 and second clamping face 32.

Referring to fig. 4, 8 and 9, in some examples, the clamping assembly 30 further includes a first elastic member 35 disposed in the guide hole 22, and the first elastic member 35 is respectively connected to the cylinder 20 and the connecting rod 33 for generating a force for elastically pulling the connecting rod 33 into the guide hole 22.

One end of the first elastic member 35 is limited on the cylinder 20, and the other end of the first elastic member 35 is connected to the link 33, so that when the link 33 moves along the guide hole 22, the first elastic member 35 can generate elastic traction force on the link 33, and under the elastic traction force of the first elastic member 35, the link 33 tends to move along the guide hole 22 toward the inside of the cylinder 20. Under the elastic traction of the first elastic member 35, the pressing bar 31 has a tendency to move to the closed position, so that the second clamping surface 32 has a tendency to clamp the first clamping surface 21, and the pressing bar 31 can press the film 100 on the cylinder 20.

With continued reference to fig. 4, in some examples, the barrel 20 has a hollow portion 23; one end of the guide hole 22 far away from the outer peripheral wall of the cylinder 20 penetrates through the hollow part 23; the first elastic member 35 is connected to an inner wall surface of the hollow portion 23.

The guide hole 22 is a through hole opened in the cylinder 20 so that one end of the link 33 remote from the pressing bar 31 can extend to the position of the hollow portion 23. The first elastic member 35 is attached to an inner wall surface of the hollow portion 23 to facilitate fixing of the first elastic member 35. In order to avoid affecting the normal function of the cylinder 20, the inner diameter of the guide hole 22 formed in the cylinder 20 should not be too large. In some examples, the first elastic member 35 partially extends into the guide hole 22 and is connected to the link 33, the first elastic member 35 is fixed by connecting the first elastic member 35 to an inner wall surface of the hollow portion 23, and the first elastic member 35 partially extends along the guide hole 22 and is connected to the link 33, so that the inner space of the guide hole 22 can be fully utilized. In some examples, the first elastic member 35 is connected to an end of the link 33 away from the pressing bar 31 to exert an elastic traction on the link 33, and the first elastic member 35 does not occupy the space inside the guide hole 22.

Referring to fig. 4 and 9, in some examples, the first elastic member 35 includes a connection member 352 and a first spring 351 connected to the connection member 352, and the connection member 352 is connected to an inner wall surface of the hollow portion 23; the first spring 351 has one end connected to the connecting member 352 and the other end connected to the link 33.

The connecting member 352 is used to connect with the cylinder 20, and the first spring 351 is used to connect with the connecting rod 33, so as to conveniently fix the first spring 351. Since the first spring 351 is stretchable and flexible, the first spring 351 having variable performance can be conveniently fixed by providing the connection member 352 on the inner wall surface of the hollow portion 23 of the cylinder 20.

When the first spring 351 is installed, the first spring 351 may be axially disposed along the guide hole 22 to fully utilize the inner space of the guide hole 22; the first spring 351 may be provided on the inner wall surface of the hollow portion 23 for easy installation.

Referring to fig. 4, 8 and 9, in some examples, the first spring 351 is sleeved on the periphery of the link 33 and extends along the length direction of the link 33.

The first spring 351 is sleeved outside the link 33, so that the first spring 351 occupies a gap between the outer peripheral wall of the link 33 and the inner wall surface of the guide hole 22, and the inner space of the guide hole 22 is fully utilized. Because first spring 351 overlaps when establishing the periphery at connecting rod 33, can make first spring 351 extend along the axial of connecting rod 33, and then can play and carry out spacing effect to first spring 351, prevent that first spring 351 from producing the dislocation.

Referring to fig. 4, in some examples, the connecting element 352 is disposed around the outer periphery of the connecting rod 33, and a maximum outer diameter of the connecting element 352 is greater than an inner diameter of the guiding hole 22.

The connecting member 352 is provided with a through hole, the connecting rod 33 is arranged through the through hole, and the inner diameter of the through hole on the connecting member 352 is larger than the outer diameter of the connecting rod 33, so that the connecting rod 33 can move axially relative to the connecting member 352. By sleeving the connecting member 352 on the connecting rod 33, the connecting member 352 and the first spring 351 can be conveniently fixed. Since the maximum outer circumferential diameter of the connection member 352 is larger than the inner diameter of the guide hole 22, the connection member 352 cannot move toward the inside of the guide hole 22, thereby realizing the limit of the connection member 352.

Further, in some examples, a first limit groove 24 is concavely provided on an inner wall surface of the hollow portion 23, and one end of the guide hole 22, which is far away from the outer peripheral wall of the cylinder body 20, penetrates to a groove bottom of the first limit groove 24; the connecting member 352 is disposed in the first limiting groove 24.

The first limiting groove 24 is a groove concavely formed on the inner wall surface of the hollow portion 23, and after the connecting member 352 is arranged in the first limiting groove 24, the connecting member 352 is blocked by the first limiting groove 24, so that the connecting member 352 cannot move in the radial direction of the guide hole 22, and thus the connecting member 352 can be prevented from being dislocated. The connecting member 352 is fixed in the first limiting groove 24, so that the connecting member 352 is prevented from moving unnecessarily under the action of the first spring 351, and the first elastic member 35 is prevented from falling off.

Referring to fig. 4 and 8, a limiting protrusion 334 is convexly disposed on an outer peripheral wall of one end of the connecting rod 33 close to the pressing bar 31, and a maximum outer peripheral diameter of the limiting protrusion 334 is greater than an inner diameter of the guide hole 22.

The limit protrusion 334 is protrudingly provided on the outer peripheral wall of the link 33 so that the limit protrusion 334 cannot enter the guide hole 22 when the link 33 is inserted into the guide hole 22. The maximum depth of the link 33 inserted into the guide hole 22 is limited by the limit protrusion 334, so that when the second clamping surface 32 of the pressing rod 31 and the first clamping surface 21 of the cylinder 20 are clamped with each other, the link 33 cannot move further into the guide hole 22, so as to limit the link 33 and the pressing rod 31.

The limit protrusion 334 may be a protrusion provided on the outer peripheral wall of the link 33, or may be a protruding ring provided around the outer peripheral wall of the link 33.

Referring to fig. 4 and 7, in some examples, a second limiting groove 25 is formed in the outer circumferential wall of the cylinder 20, and one end of the guide hole 22, which is far away from the outer circumferential wall of the cylinder 20, penetrates to the bottom of the second limiting groove 25; when the pressing bar 31 is in the closed position, the limit protrusion 334 is fitted into the second limit groove 25.

The second limiting groove 25 is concavely arranged on the outer peripheral wall of the barrel 20. Because the limit protrusion 334 is disposed at one end of the connecting rod 33 close to the pressing bar 31, and the second limit groove 25 is used for accommodating the limit protrusion 334, when the second clamping surface 32 of the pressing bar 31 and the first clamping surface 21 of the barrel 20 are clamped with each other, the limit protrusion 334 is located in the second limit groove 25, so that the limit protrusion 334 does not affect the pressing bar 31.

Further, in some examples, an end of the first spring 351 remote from the connector 352 is coupled to the limit projection 334.

Because the spring can extend along the axial direction of the guide hole 22, the end of the first spring 351 far away from the connecting piece 352 is fixed through the limiting convex part 334, so that the first spring 351 and the connecting rod 33 can be conveniently fixed to each other, and the first elastic piece 35 can be conveniently installed.

In some examples, the clamping assembly 30 further includes a first driving member (not shown) drivingly connected to an end of the link 33 remote from the press bar 31 for driving the link 33 to move the press bar 31 between the closed position and the open position.

In some examples, the first driving member is a cylinder or an air expansion shaft, and the first driving member moves the connecting rod 33 along the axial direction of the guiding hole 22, so as to move the pressing bar 31 between the closed position and the open position.

The first driving member may be provided in the hollow portion 23 of the cylindrical body 20, or may be provided at any position of the cylindrical body 20 to which the link 33 can be drivingly connected. When the link 33 is driven to move by the first driving member, the link 33 stretches the first elastic member 35, so that the link 33 is subjected to the elastic traction force of the first elastic member 35, and the link 33 and the pressing rod 31 have a tendency to move to the closed position. When the acting force of the first driving member on the connecting rod 33 is removed, the connecting rod 33 drives the pressing rod 31 to move to the closed position under the action of the first elastic member 35, so that the film 100 is elastically clamped between the first clamping surface 21 and the second clamping surface 32, and the film 100 is fixed.

When the link 33 has the limit protrusion 334 according to the above example, the force of the first driving member acting on the link 33 is eliminated, the link 33 moves toward the inside of the guide hole 22 by the elastic force of the first elastic member 35, and when the limit protrusion 334 abuts against the groove bottom of the second limit groove 25, the pressing bar 31 reaches the closed position, and the film 100 is clamped by the first clamping surface 21 and the second clamping surface 32.

Referring to fig. 5, 6 and 7, further, in some examples, the outer circumferential wall of the barrel 20 is recessed with a positioning groove 27, and the first holding surface 21 is formed in the positioning groove 27.

In the state shown in fig. 2, the distance between one end of the pressing rod 31 away from the axial center of the cylinder 20 and the axial center of the cylinder 20 is a first distance; the positioning groove 27 is a concave groove formed on the outer circumferential wall of the barrel 20, and when the pressing rod 31 is in the closed position, the pressing rod 31 is at least partially located in the positioning groove 27, so that the difference between the first distance and the radius of the ring surface where the outer circumferential wall of the barrel 20 is located is relatively smaller. Because the film 100 is wound on the outer circumferential wall of the barrel 20, by arranging the positioning groove 27, when the pressing rod 31 is located at the closed position, the pressing rod 31 protrudes to less positions on the outer circumferential wall of the barrel 20, so that the film 100 wound on the barrel 20 is prevented from being ejected, and the film 100 wound on the barrel 20 is prevented from being damaged.

Further, in some examples, the guide hole 22 is provided through to the positioning groove 27. The link 33 passes through the positioning groove 27 and the guide hole 22 in sequence and is inserted into the cylinder 20, so that the link 33 can drive the pressing rod 31 to switch between the closed position and the open position. When the guiding hole 22 penetrates to the positioning groove 27, the pressing rod 31 is in the closed position state, and the connecting rod 33 is completely hidden in the positioning groove 27, so that the connecting rod 33 is prevented from influencing the film 100 wound on the drum 20, the connecting rod 33 and the film 100 are prevented from interfering with each other, and the film 100 is prevented from being damaged. When the first driving piece is installed, the driving end of the first driving piece can be inserted into the guide hole 22 and then connected with the connecting rod 33; or, the end of the connecting rod 33 far away from the pressing rod 31 protrudes out of the end of the guide hole 22 far away from the positioning groove 27, and is connected with the first driving piece; when the structure such as the inflatable shaft is adopted, the driving of the connecting rod 33 can be conveniently realized.

Referring to fig. 10, 11 and 12, in some examples, the link 33 has a proximal end for connecting the pressure bar 31 and a distal end away from the pressure bar 31; the barrel 20 is provided with a positioning shaft (not shown in the figures), the connecting rod 33 is rotatably connected with the positioning shaft, and the positioning shaft is positioned between the proximal end and the distal end of the connecting rod 33; the reel further comprises a second elastic member 36; the distal end of the link 33 is connected to the barrel 20 by a second elastic member 36, so that the second elastic member 36 generates a force for pulling the proximal end of the link 33 and the pressing bar 31 toward the first holding surface 21.

Referring to fig. 13, 14 and 15, the positioning shaft is connected to the cylinder 20, and the link 33 is rotatably connected to the positioning shaft, so that the link 33 can rotate around the positioning shaft. The "near" and "far" refer to the distance between any part on the link and the pressure bar 31. The proximal end of the link 33 is used for connecting with the pressing bar 31, the distal end of the link 33 is used for connecting with the second elastic element 36, and the link 33 forms a lever-like structure taking the positioning shaft as a rotation center under the action of the positioning shaft. When the link 33 performs a pressing or stretching operation on the second elastic member 36, the link 33 rotates around the positioning shaft under the elastic action of the second elastic member 36, so that the pressing bar 31 mounted at the distal end of the link 33 moves synchronously, thereby switching the movement of the pressing bar 31 between the closed position and the open position.

The second elastic member 36 may be a compression spring, and the relative rotation of the link 33 is achieved by elastic deformation. In this example, a driving mechanism may be provided on the cylinder 20 for driving the link 33 to rotate about the positioning shaft.

Since the connecting rod 33 can drive the pressing rod 31 to move relatively, the pressing rod 31 can have a tendency to move to the closed position under the action of the second elastic member 36, and the film 100 can be clamped between the second clamping surface 32 and the first clamping surface 21.

Further, in some examples, clamp assembly 30 further includes a second drive member (not shown) drivingly connected to the distal end of link 33 for driving link 33 to rotate about the positioning axis. The second driving member may be a motor, a cylinder, an electric cylinder or other devices capable of driving the connecting rod 33 to rotate around the positioning shaft. By driving the relative movement of the far end of the connecting rod 33, the connecting rod 33 can drive the pressing rod 31 to move synchronously, so that the movement switching of the pressing rod 31 between the opening position and the closing position is realized, and meanwhile, the automatic control of the pressing rod 31 can be realized.

In some examples, the positioning shaft and the connecting rod 33 are disposed at two axial ends of the cylinder 20, so that the connecting rod 33 does not interfere with the film 100, thereby preventing the film 100 from being damaged due to the fact that the connecting rod 33 jacks up the film 100.

Referring to fig. 13 and 14, in some examples, a third limiting groove 26 is concavely formed on the outer circumferential wall of the cylinder 20, and when the pressing rod 31 moves to the closed position under the action of the connecting rod 33, the pressing rod 31 is at least partially embedded in the third limiting groove 26, so as to prevent the film 100 from being damaged due to the fact that the pressing rod 31 protrudes from the outside of the cylinder 20 too much. The third stopper groove 26 may be a through groove penetrating the outer circumferential wall of the cylinder 20 in the radial direction of the cylinder 20, or may be an inner groove recessed in the surface of the cylinder 20.

Referring to fig. 16, 17 and 18, in some examples, the clamping assembly 30 further includes a third driving member (not shown) disposed on the barrel 20; the connecting rod 33 comprises a rocker 331, a driving rod 332 and a driven rod 333, and the rocker 331 is in driving connection with the third driving element; the driving rod 332 is rotatably connected with one end of the rocker 331 away from the third driving element; one end of the driven rod 333 is rotatably connected with the cylinder 20, and the other end is connected with the pressing rod 31 and one end of the driving rod 332 far away from the rocker 331; the third driving member is used to drive the rocking bar 331, the active lever 332, and the rocking bar 331 so as to move the pressing bar 31 between the open position and the closed position.

The rocker 331, the driving lever 332 and the driven lever 333 are combined to form a multi-link mechanism, and when the rocker 331 is driven to rotate by the third driving member, the multi-link mechanism moves synchronously, so that the multi-link mechanism can drive the pressing rod 31 to move and switch between the opening position and the closing position.

In this example, the third driving member may be a motor, a cylinder or other devices capable of driving the rocker 331 to rotate relatively. Through adopting the third driving piece to drive the pressure lever 31 to move relatively, the pressure lever 31 can move relatively according to the preset track, and then the positioning clamping and the positioning of the film layer 100 are realized.

Further, in some examples, the cylinder 20 is concavely provided with a third limiting groove 26, and an inner wall surface of the third limiting groove 26 forms the first clamping surface 21; the links 33 are provided at both axial ends of the cylinder 20.

The third limiting groove 26 forms a space for accommodating the pressing rod 31, so that when the pressing rod 31 is in the closed position, the pressing rod 31 is at least partially located in the third limiting groove 26 to reduce the height of the pressing rod 31 protruding out of the outer peripheral wall of the cylinder 20, and further, when the pressing rod 31 protrudes out of the outer peripheral wall of the cylinder 20, the pressing rod 31 jacks up the film 100 to damage the film 100. Because the connecting rods 33 are located at the two axial ends of the cylinder 20, the stability of the pressing rod 31 can be improved, meanwhile, the connecting rods 33 are prevented from interfering the film 100, and the film 100 is prevented from being damaged by the connecting rods 33.

Referring to fig. 19 and 20, the present example also proposes an example of a film layer winding apparatus based on the above-described example of the roll. The film winding apparatus is used for winding the film 100, and includes a main winding member 10, an auxiliary shaft 11, and a winding drum as in any of the above examples. The main winding member 10 is used for winding the film 100; the roll as described in any of the above examples is arranged adjacent to the main winding member 10; the auxiliary shaft 11 is movably arranged between the main winding member 10 and the winding drum; the auxiliary shaft 11 is used for pushing the film 100 output by the main winding member 10 to the cylinder 20, so that the film 100 can be embedded in the gap between the first clamping surface 21 and the second clamping surface 32.

The film 100 to be processed is wound on the main winding member 10, and the feeding direction of the film 100 is controlled by the auxiliary shaft 11. The number of the auxiliary shafts 11 may be plural to adjust the conveying direction of the film 100.

When the auxiliary shaft 11 moves to a position close to the cylinder 20, the auxiliary shaft 11 drives the film 100 to move synchronously to the cylinder 20, so as to push the film 100 to the cylinder 20. When clamping assembly 30 is moved to the open position, film 100 is cut along the cutting position shown in fig. 21, the end of film 100 extends into the gap between first clamping surface 21 and second clamping surface 32 under the pressure of auxiliary shaft 11, and clamping assembly 30 is switched to the closed position, so that film 100 is clamped between first clamping surface 21 and second clamping surface 32, and the end of film 100 is fixed on barrel 20. After the end of the film 100 is fixed on the cylinder 20, the cylinder 20 may be driven to rotate by other devices, so as to wind the film 100 on the cylinder 20.

It should be noted that, since the example of the film layer winding device of the present invention is based on the above-mentioned reel, the example of the film layer winding device of the present invention includes all technical solutions of all the above-mentioned reels, and the achieved technical effects are also completely the same, and are not described herein again.

The present example also provides an example of a battery processing system including the film layer winding device according to the above example, on the basis of the film layer winding device according to the above example.

Referring to fig. 1 to 22, in some examples, the winding drum has a cylinder 20 and a clamping assembly 30, and the clamping assembly 30 includes a connecting rod 33 and a driving device for driving the connecting rod 33 to move along a predetermined track. The clamping assembly 30 is movable between an open position and a closed position such that when the clamping assembly 30 is in the open position, an end of the film layer 100 can extend between the first clamping surface 21 and the second clamping surface 32; when the clamping assembly 30 is switched to the closed position, the first clamping surface 21 and the second clamping surface 32 are clamped to each other, so that the film 100 is clamped and fixed in the gap between the first clamping surface 21 and the second clamping surface 32, and the end of the film 100 is fixed on the cylinder 20. The clamping assembly 30 is adopted to fix the film layer 100, so that the conventional devices such as adhesive tapes are not required to be adopted for fixing, and the utilization of resources such as the adhesive tapes can be reduced; because the glue has on the sticky tape, glue is attached to on the barrel 20 periphery wall, easily influences the barrel 20 surface, influences the secondary use of barrel 20, utilizes clamping component 30 to carry out the centre gripping fixedly to rete 100 in this example, can reduce the influence to barrel 20, avoids barrel 20 to be polluted by impurity such as glue.

The above description is only a preferred example of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A roll for holding a film, the roll comprising:

2. The spool as claimed in claim 1, characterized in that said clamping assembly comprises:

a pressing bar, wherein the second clamping surface is formed on the pressing bar; and

3. The spool as claimed in claim 2, characterized in that the cylinder is provided with a guide hole, one end of which penetrates to the outer peripheral wall of the cylinder; the connecting rod penetrates through the guide hole and can move in a reciprocating mode along the guide hole, so that the connecting rod can drive the pressing rod to move between the closed position and the open position.

4. The spool as claimed in claim 3, characterized in that said clamping assembly further comprises:

5. The spool as claimed in claim 4, characterized in that said cylinder has a hollow;

6. The spool as claimed in claim 5, characterized in that said first elastic member comprises:

7. The spool as claimed in claim 6, wherein the first spring is sleeved on the periphery of the connecting rod and extends along the length direction of the connecting rod.

8. The spool as claimed in claim 6, wherein the connecting member is sleeved on the outer periphery of the connecting rod, and the maximum outer peripheral diameter of the connecting member is larger than the inner diameter of the guide hole.

9. The winding drum as claimed in claim 8, wherein a first limit groove is concavely arranged on the inner wall surface of the hollow part, and one end of the guide hole, which is far away from the outer peripheral wall of the drum body, penetrates to the groove bottom of the first limit groove; the connecting piece is arranged in the first limiting groove.

10. The spool as claimed in claim 6, characterized in that a limiting protrusion is protruded from an outer peripheral wall of the end of the link rod adjacent to the pressing bar, and a maximum outer peripheral diameter of the limiting protrusion is larger than an inner diameter of the guide hole.

11. The reel as claimed in claim 10, wherein the outer peripheral wall of the cylinder body is provided with a second limiting groove, and one end of the guide hole, which is far away from the outer peripheral wall of the cylinder body, penetrates to the bottom of the second limiting groove; when the pressing bar is located at the closed position, the limiting convex part is embedded into the second limiting groove.

12. A spool as claimed in claim 10, wherein an end of said first spring remote from said connector is connected to said limit lug.

13. The spool as claimed in any one of claims 2 to 12, characterized in that the clamping assembly further comprises a first drive member in driving connection with an end of the link remote from the pressure bar for driving the link to move the pressure bar between the closed position and the open position.

14. The spool as claimed in claim 13, characterized in that the first drive member is a pneumatic cylinder or an inflatable shaft.

15. The spool as claimed in any one of claims 3 to 12, characterized in that the peripheral wall of the spool is recessed with a positioning groove in which the first clamping surface is formed.

16. The spool as claimed in claim 15, characterized in that the guide hole is provided through to the positioning slot.

17. The spool as claimed in claim 2, characterized in that said connecting rod has a proximal end for connection to said pressure bar and a distal end remote from said pressure bar;

the reel further comprises a second elastic member; the far end of the connecting rod is connected with the cylinder through the second elastic piece, so that the second elastic piece generates acting force for drawing the near end of the connecting rod and the pressing rod to the direction of the first clamping face.

18. The reel of claim 17, wherein the clamp assembly further comprises a second drive member drivingly connected to the distal end of the link for driving rotation of the link about the positioning axis.

19. The spool as claimed in claim 2, wherein the clamp assembly further comprises a third drive member provided to the barrel;

the connecting rod includes:

the rocker is in driving connection with the third driving piece;

20. The spool as claimed in any one of claims 17 to 19, characterized in that a third retaining groove is recessed in the spool body, an inner wall surface of the third retaining groove forming the first clamping surface; the connecting rods are arranged at two axial ends of the cylinder body.

21. A film layer winding apparatus for winding a film layer, comprising:

a main winding member for winding the film;

the spool as claimed in any one of claims 1 to 20, disposed adjacent to the primary winding member; and

the auxiliary shaft is movably arranged between the main winding piece and the winding drum; the auxiliary shaft is used for pushing the film layer output by the main winding piece to the barrel so that the film layer can be embedded in a gap between the first clamping face and the second clamping face.

22. A battery processing system comprising the film winding device of claim 21.