Dry-method membrane stripping assembly and dry-method membrane pre-forming device

Abstract

The utility model relates to the technical field of lithium battery dry-method membrane preparation, in particular to a dry-method membrane stripping assembly and a dry-method membrane pre-forming device. The utility model provides a dry-method membrane stripping assembly which comprises a rack, a driving motor, a driving roller, a driven roller, a first magnetic wheel and a second magnetic wheel, the driving motor, the driving roller and the driven roller are arranged on the rack; the first magnetic wheel is connected to the output end of the driving motor, and the second magnetic wheel is connected to the driving roller; the first magnetic wheel is in magnetic transmission connection with the second magnetic wheel. Due to the fact that the first magnetic wheel and the second magnetic wheel are in magnetic transmission connection, torque is transmitted through magnetic force, and rigid connection does not exist, when the driving motor is started, rigid impact does not exist, membrane tearing is effectively avoided, when powder pressing and membrane forming are stopped, the driving roller and the driven roller stop rotating, the driving motor can still rotate freely, motor stalling is avoided, and the service life of the motor is prolonged. And motor damage is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of dry-process lithium battery film making, in particular to a dry-process film stripping component and a dry-process pre-film forming device. Background Art

[0002] Currently, the manufacturing process for lithium battery pole pieces is primarily based on wet slurry coating technology. Due to the significant advantages of dry pole piece manufacturing processes in terms of non-toxicity, energy conservation and emission reduction, and space saving, more and more companies are investing in the research and development of dry pole piece manufacturing.

[0003] At present, the dry process generally uses a multi-roll continuous calendering and step-by-step thinning process. Because the film formed by the dry process is relatively fragile and can withstand very small tensile forces, when the film is peeled off after the powder is pressed and formed, the conventional tension maintenance mechanism uses a motor rigidly connected to the active roller, using the motor operating in torque mode to maintain a certain tension on the film. However, due to the rigid connection, the impact force when the motor is started is directly transmitted to the film, which can easily cause the film to tear. In addition, when the powder is pressed and formed, the motor will enter a stalled state, which can easily cause the motor to heat up. Utility Model Content

[0004] The purpose of the utility model is to provide a dry film stripping assembly and a dry pre-filming device to solve the technical problems that the existing tension maintaining mechanism adopts a rigid connection between the motor and the active roller, the impact force when the motor is started will be directly transmitted to the film, which may easily cause the film to tear, and when the powder pressing and film forming is stopped, the motor will be in a stalled state, which may easily cause the motor to heat up.

[0005] In a first aspect, the utility model provides a dry film stripping assembly for stripping a film formed by extruding powder through a dry pre-filming device, the dry film stripping assembly comprising: a frame, a drive motor, an active roller, a driven roller, a first magnetic wheel and a second magnetic wheel;

[0006] The driving motor, the active roller, and the driven roller are all arranged on the frame;

[0007] The first magnetic wheel is connected to the output end of the driving motor, and the second magnetic wheel is connected to the active roller;

[0008] The first magnetic wheel is connected to the second magnetic wheel through magnetic transmission.

[0009] In an optional embodiment, the axis of the first magnetic wheel is parallel to the axis of the second magnetic wheel.

[0010] In an optional embodiment, it further includes a translation drive mechanism, wherein the translation drive mechanism is arranged on the frame;

[0011] The translation driving mechanism is connected to the driven roller and is used to drive the driven roller to move toward or away from the active roller.

[0012] In an optional embodiment, the translation drive mechanism includes a pair of slide cylinders;

[0013] The output ends of a pair of slide cylinders are respectively connected to the two ends of the driven roller.

[0014] In an optional embodiment, a bearing seat is further included;

[0015] The driven roller is connected to the bearing seat via a driven roller bearing;

[0016] The translation driving mechanism is connected to the bearing seat, and the translation driving mechanism drives the driven roller to move closer to or away from the driving roller through the bearing seat.

[0017] In an optional embodiment, it further includes a motor base;

[0018] The motor base is connected to the frame, and the driving motor is connected to the motor base.

[0019] In an optional embodiment, a waist-shaped hole is provided on the motor base, and the motor base is connected to the frame via a connecting piece and the waist-shaped hole.

[0020] In an optional embodiment, it further includes an active roller bearing;

[0021] Both ends of the active roller are connected to the frame through the active roller bearings.

[0022] In an optional embodiment, a rubber coating layer is provided on the active roller;

[0023] and / or;

[0024] The driven roller is provided with a rubber layer.

[0025] In a second aspect, the present invention provides a dry pre-filming device, comprising the dry film stripping assembly described in any one of the aforementioned embodiments.

[0026] Compared with the existing technology, the dry film stripping assembly and dry pre-filming device provided by the present invention have the following technical advantages:

[0027] The dry method film piece stripping assembly provided by the utility model is used for stripping the film piece extruded by the dry method pre-film forming device, and comprises a rack, a driving motor, a driving roller, a driven roller, a first magnetic wheel and a second magnetic wheel.

[0028] The film piece extruded by the powder is passed between the driving roller and the driven roller, the driving motor drives the first magnetic wheel to rotate, the first magnetic wheel transmits the torque to the second magnetic wheel through magnetic force, thereby transmitting the torque to the driving roller, the driving roller and the driven roller cooperate to apply tension to the film piece, and the film piece is pulled to move to realize the stripping of the film piece.

[0029] The dry method pre-film forming device provided by the utility model comprises the dry method film piece stripping assembly, and the technical advantages and effects achieved by the dry method film piece stripping assembly are achieved, and will not be described in detail here.

[0030] Other features and advantages of the utility model will be described in detail in the following specific embodiment part. ACCURACY OF DRAWINGS

[0031] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0032] Figure 1 The dry method film piece stripping assembly structure schematic view provided by the utility model embodiment is shown in the figure.

[0033] Figure 2 The motor base structure schematic view provided by the utility model embodiment is shown in the figure.

[0034] Figure 3 The dry method pre-film forming device partial schematic view provided by the utility model embodiment is shown in the figure.

[0035] Figure 4 The dry method pre-film forming device structure schematic view provided by the embodiment of the present application.

[0036] Icon: 1-dry method film stripping assembly; 2-frame; 3-driving motor; 4-driving roller; 5-following roller; 6-first magnetic wheel; 7-second magnetic wheel; 8-sliding table air cylinder; 9-bearing seat; 10-following roller bearing; 11-motor base; 12-waist-shaped hole; 13-driving roller bearing; 14-rubber coating layer; 15-side plate. DETAILED DESCRIPTION

[0037] The technical solutions of the present application will be described clearly and completely below in conjunction with embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0041] The present application will be described in further detail below through specific embodiments and in conjunction with the drawings.

[0042] The specific structure is as follows Figures 1 to 4 as shown.

[0043] The embodiment provides a dry film stripping assembly 1 for stripping a film extruded by a dry pre-film forming device from powder, the dry film stripping assembly 1 comprising a rack 2, a driving motor 3, a driving roller 4, a driven roller 5, a first magnetic wheel 6 and a second magnetic wheel 7; the driving motor 3, the driving roller 4 and the driven roller 5 are arranged on the rack 2; the first magnetic wheel 6 is connected to an output end of the driving motor 3, and the second magnetic wheel 7 is connected to the driving roller 4; the first magnetic wheel 6 is in magnetic transmission connection with the second magnetic wheel 7.

[0044] In the embodiment, the film extruded from the powder passes between the driving roller 4 and the driven roller 5, the driving motor 3 drives the first magnetic wheel 6 to rotate, the first magnetic wheel 6 transmits the torque to the second magnetic wheel 7 through the magnetic force, thereby transmitting the torque to the driving roller 4, the driving roller 4 and the driven roller 5 cooperate to apply tension to the film, and the film is pulled to move to realize the stripping of the film. Since the first magnetic wheel 6 and the second magnetic wheel 7 are in magnetic transmission connection, the torque is transmitted through the magnetic force, and there is no rigid connection, so there is no rigid impact when the driving motor 3 starts, the film is effectively prevented from being torn, and the film is stopped from being continuously delivered between the driving roller 4 and the driven roller 5 when the powder is stopped from being pressed to form the film, at this time, the friction between the film between the driving roller 4 and the driven roller 5 and the driving roller 4 and the driven roller 5 is increased, so that the first magnetic wheel 6 cannot continue to drive the second magnetic wheel 7 to rotate, and the driving roller 4 and the driven roller 5 stop rotating, but the driving motor 3 can still rotate freely, the motor is prevented from being blocked, and the motor is prevented from being damaged.

[0045] In an optional technical solution of the embodiment, the axis of the first magnetic wheel 6 is parallel to the axis of the second magnetic wheel 7. The first magnetic wheel 6 and the second magnetic wheel 7 are in non-contact transmission, the size of the torque transmitted between the first magnetic wheel 6 and the second magnetic wheel 7 can be conveniently adjusted, and the film is further prevented from being torn.

[0046] The embodiment is not limited to this, the axes of the first magnetic wheel 6 and the second magnetic wheel 7 can also be perpendicular to each other, and the axes of the two are not in the same plane, and this arrangement can also prevent the film from being torn.

[0047] In an optional technical solution of the embodiment, a translation driving mechanism is further included, and the translation driving mechanism is arranged on the rack 2; the translation driving mechanism is connected to the driven roller 5 and is used to drive the driven roller 5 to move towards or away from the driving roller 4.

[0048] In the embodiment, the translation driving mechanism drives the driven roller 5 to move, so that the interval between the driving roller 4 and the driven roller 5 can be adjusted, the initial penetration of the film between the driving roller 4 and the driven roller 5 is facilitated, the compression degree of the film is conveniently adjusted, the tension applied to the film is adjusted, and the film is further prevented from being torn.

[0049] In an optional technical solution of the embodiment, the translation driving mechanism comprises a pair of slide table cylinders 8; output ends of the pair of slide table cylinders 8 are respectively connected to two ends of the driven roller 5.

[0050] Specifically, the rack 2 comprises a pair of side plates 15, the driving roller 4 and the driven roller 5 are arranged between the pair of side plates 15, and the pair of slide table cylinders 8 are respectively connected to the pair of side plates 15, and output ends of the pair of slide table cylinders 8 are respectively connected to two ends of the driven roller 5, so that the overall structure is simple, the driving is stable, and the cost is low.

[0051] In an optional technical solution of the embodiment, a bearing seat 9 is further included; the driven roller 5 is connected to the bearing seat 9 through a driven roller bearing 10; the translation driving mechanism is connected to the bearing seat 9, and the translation driving mechanism drives the driven roller 5 to approach or move away from the driving roller 4 through the bearing seat 9.

[0052] In the embodiment, the bearing seat 9 is arranged in a pair, two ends of the driven roller 5 are respectively connected to the pair of bearing seats 9 through the driven roller bearings 10, output ends of the slide table cylinders 8 are connected to the bearing seats 9, the slide table cylinders 8 drive the bearing seats 9 to move, thereby driving the driven roller 5 to move, and stability is ensured.

[0053] The embodiment is not limited thereto, and the translation driving mechanism can also be an electric slide table or an extension motor, which is arranged in the same manner as the slide table cylinder 8, and details are not described herein.

[0054] In an optional technical solution of the embodiment, a motor seat 11 is further included; the motor seat 11 is connected to the rack 2, and the driving motor 3 is connected to the motor seat 11.

[0055] In the embodiment, the driving motor 3 is connected to the side plate 15 through the motor seat 11, which is convenient for installation and stable in connection.

[0056] In an optional technical solution of the embodiment, a waist-shaped hole 12 is arranged on the motor seat 11, and the motor seat 11 is connected to the rack 2 through a connecting piece and the waist-shaped hole 12.

[0057] In the embodiment, the connecting piece connects the motor seat 11 to the side plate 15 through the waist-shaped hole 12, the installation position of the motor seat 11 can be adjusted through the waist-shaped hole 12, so that the spacing between the first magnetic wheel 6 and the second magnetic wheel 7 is adjusted, the size of the torque transmitted between the first magnetic wheel 6 and the second magnetic wheel 7 is adjusted, and the applicability is improved.

[0058] In an optional technical solution of the embodiment, a driving roller bearing 13 is further included; two ends of the driving roller 4 are connected to the rack 2 through the driving roller bearing 13.

[0059] In this embodiment, active roller bearings 13 are provided at both ends of the active roller 4. The active roller 4 is connected to the side plate 15 through the active roller bearings 13, and the end of the active roller 4 passes through the side plate 15 and is connected to the second magnetic wheel 7, that is, the first magnetic wheel 6 and the second magnetic wheel 7 cooperate on the outside of the side plate 15 to avoid interfering with the operation of the active roller 4.

[0060] In an optional technical solution of this embodiment, a rubber coating layer 14 is provided on the active roller 4 ; and / or a rubber coating layer 14 is provided on the driven roller 5 .

[0061] In this embodiment, preferably, both the active roller 4 and the driven roller 5 are provided with a rubber coating 14 , which contacts the diaphragm through the rubber coating 14 to ensure the effect of the diaphragm while preventing damage to the diaphragm.

[0062] The working process of this embodiment is:

[0063] The extruded diaphragm passes between the rubber coating 14 of the active roller 4 and the driven roller 5, and then a pair of slide cylinders 8 extend to make the driven roller 5 press the diaphragm between the rubber coating 14 of the active roller 4 and the driven roller 5. The driving motor 3 drives the first magnetic wheel 6 to rotate, and transmits the torque to the second magnetic wheel 7 through magnetic force, thereby transmitting the torque to the active roller 4, so that the diaphragm always maintains a certain tension, which can pull the diaphragm to move and realize the peeling of the diaphragm.

[0064] This embodiment provides a dry pre-filming device, including the above-mentioned dry film stripping component 1. Therefore, the technical advantages and effects achieved by the dry pre-filming device include the technical advantages and effects achieved by the above-mentioned dry film stripping component 1, which will not be repeated here.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dry film stripping assembly for stripping a film formed by extruding powder through a dry pre-filming device, characterized in that: The dry film stripping assembly (1) comprises: a frame (2), a driving motor (3), an active roller (4), a driven roller (5), a first magnetic wheel (6) and a second magnetic wheel (7); The driving motor (3), the active roller (4), and the driven roller (5) are all arranged on the frame (2); The first magnetic wheel (6) is connected to the output end of the driving motor (3), and the second magnetic wheel (7) is connected to the active roller (4); The first magnetic wheel (6) is connected to the second magnetic wheel (7) by magnetic transmission.

2. The dry film stripping assembly according to claim 1, characterized in that: The axis of the first magnetic wheel (6) is parallel to the axis of the second magnetic wheel (7).

3. The dry film stripping assembly according to claim 1, characterized in that: It also includes a translation drive mechanism, which is arranged on the frame (2); The translation drive mechanism is connected to the driven roller (5) and is used to drive the driven roller (5) to move toward the active roller (4) or away from the active roller (4).

4. The dry film stripping assembly according to claim 3, characterized in that: The translation drive mechanism includes a pair of slide cylinders (8); The output ends of a pair of slide cylinders (8) are respectively connected to the two ends of the driven roller (5).

5. The dry film stripping assembly according to claim 3, characterized in that: It also includes a bearing seat (9) and a driven roller bearing (10); The driven roller (5) is connected to the bearing seat (9) via a driven roller bearing (10); The translation drive mechanism is connected to the bearing seat (9), and the translation drive mechanism drives the driven roller (5) to approach or move away from the active roller (4) through the bearing seat (9).

6. The dry film stripping assembly according to claim 1, characterized in that: Also includes a motor base (11); The motor seat (11) is connected to the frame (2), and the drive motor (3) is connected to the motor seat (11).

7. The dry film stripping assembly according to claim 6, characterized in that: A waist-shaped hole (12) is provided on the motor seat (11), and the motor seat (11) is connected to the frame (2) via a connecting piece and the waist-shaped hole (12).

8. The dry film stripping assembly according to claim 1, characterized in that: Also includes an active roller bearing (13); Both ends of the active roller (4) are connected to the frame (2) via the active roller bearings (13).

9. The dry film stripping assembly according to any one of claims 1 to 8, characterized in that: The active roller (4) is provided with a rubber coating layer (14); and / or; The driven roller (5) is provided with a rubber coating layer (14).

10. A dry pre-filming device, characterized in that: The dry film stripping assembly comprises the dry film stripping assembly according to any one of claims 1 to 9.

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