CN216728887U - Wrinkle removing roller and pole piece wrinkle removing device - Google Patents

Abstract

The application discloses a wrinkle removing roller and a pole piece wrinkle removing device, belongs to the technical field of battery manufacturing equipment, and solves the problem that wrinkles exist on pole pieces in the prior art, the wrinkle removing roller is used for tensioning strips and comprises a medium injection piece, a rotating shaft and a plurality of inner elastic sleeves; the plurality of inner elastic sleeves are respectively arranged on the periphery of the rotating shaft and are distributed along the axis direction of the rotating shaft; the medium injection member is used for outputting the medium so that the medium is filled in the inner elastic sleeve. The medium injection member of wrinkle removal roller in this application embodiment carries the medium to one or more in the elastic sleeve, makes a plurality of interior elastic sleeves take place the inflation, and wrinkle removal roller rotates, and when the strip was through wrinkle removal roller, the corresponding position of the strip that the expanded interior elastic sleeve contacted was exerted pressure, makes the strip take place tensile extension, effectively reduces the fold that the in-process belting produced of roll-in, improves the strip yields.

Description

Wrinkle removing roller and pole piece wrinkle removing device

Technical Field

The application relates to the field of battery manufacturing equipment, in particular to a wrinkle removing roller and a pole piece wrinkle removing device.

Background

At present, in the production process of a lithium ion battery pole piece, active material slurry of a positive electrode or a negative electrode is generally uniformly and continuously coated on a current collector, the part of the current collector which is not coated with the active material slurry is a blank area, the part coated with the active material slurry is a coating area, the blank area and the coating area are distributed at intervals, the blank area is used for forming a pole lug part of the pole piece, and the coating area is used for forming a main body part of the pole piece. The active material slurry is dried to form an active material layer, the active material layer at the initial stage is fluffy, and the binding capacity with the current collector is poor, so that the pole piece needs to be rolled to compact the active material layer.

The thickness of a current collector of the lithium ion battery is generally between 6 and 13 microns (micrometers), after an active substance is coated, the thickness of a coating area is greater than that of a blank area, the thickness of the coating area is reduced by the pressure of a roller in a rolling process of a pole piece, the length of the coating area is increased along with a calendering effect, the thickness of the blank area is not changed due to the fact that the roller cannot press the pole piece, the thickness of the blank area is not changed and the length of the blank area is not changed in the rolling process, therefore, the coating area and the blank area of the pole piece are different in extension degree after being rolled, the blank area generates wrinkles, the wrinkles of the blank area can bring serious influence to the subsequent manufacturing of the lithium ion battery, bad results such as welding fracture of the pole piece are caused, and the safety of the battery is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, embodiments of the present application provide a wrinkle removing roller and a pole piece wrinkle removing device, which can reduce wrinkles of a pole piece in a blank area.

A first aspect of an embodiment of the present application provides a wrinkle removing roller for tensioning a band, the wrinkle removing roller including a medium injection member, a rotation shaft, and a plurality of inner elastic sleeves; the inner elastic sleeves are respectively arranged on the periphery of the rotating shaft and are arranged along the axis direction of the rotating shaft, and each inner elastic sleeve can be filled with a medium to expand so that the contact position of the strip and the inner elastic sleeve is extended to prevent the strip from generating wrinkles; the medium injection member is used for outputting the medium so that the medium is filled in the inner elastic sleeve.

By adopting the scheme, the medium injection piece of the wrinkle removing roller conveys the medium into one or more inner elastic sleeves to expand the inner elastic sleeves; the relative positions of the band and the inner elastic sleeve are adjusted, so that the expanded inner elastic sleeve corresponds to the position on the band where the wrinkles are easy to generate. In operation, the rotating shaft rotates, the strip moves perpendicular to the axial direction of the rotating shaft, and the expanded inner elastic sleeve presses the area of the strip, where wrinkles are easy to generate, so that the area is expanded, the strip can be expanded to the same extent with other areas in the area, and wrinkles in the area are reduced. When this wrinkle chasing roller is used for the tensioning pole piece, the interior elastic sleeve that will expand contacts and extrudees the extension to the margin district with the margin district of pole piece to the inflation degree of elastic sleeve in the accessible adjustment changes the interior elastic sleeve to the extrusion force of staying the margin district, so that the margin district on the pole piece can be unanimous with the extension degree of coating district, thereby reduces the fold of pole piece in the margin district.

In some embodiments, the inner elastic sleeve has a receiving cavity for receiving the medium output by the medium injector.

By adopting the scheme, the medium is output by the medium injection part, the medium is filled in the accommodating cavity, and the medium applies pressure to the inner wall of the inner elastic sleeve to enable the inner elastic sleeve to expand.

In some embodiments, the inner elastic sleeve is an annular hollow structure, and the accommodating cavity is a cavity formed between the inner diameter and the outer diameter of the inner elastic sleeve, and the inner diameter of the inner elastic sleeve is arranged outside the rotating shaft.

By adopting the scheme, the medium conveyed by the medium injection member expands the inner elastic sleeve, and the diameter of the part of the wrinkle removing roller with the inner elastic sleeve is larger than that of the part without the inner elastic sleeve, so that the wrinkle removing roller can be extruded to the position where the strip is locally thinner.

In some embodiments, the inner elastic sleeve is disposed on the outer circumference of the rotating shaft at two axial ends of the rotating shaft, and the accommodating cavity is a cavity formed between the inner wall of the inner elastic sleeve and the outer circumferential wall of the rotating shaft.

Through adopting above-mentioned scheme, the space that constitutes between the periphery wall of interior elastic sleeve middle part and pivot has constituted and has held the chamber, and the medium that the medium injection member carried out makes interior elastic sleeve inflation, and the diameter that removes the part that the wrinkle roller has interior elastic sleeve is greater than the diameter that does not set up the part of interior elastic sleeve for the wrinkle roller can extrude the local thinner position of strip.

In some embodiments, the wrinkle roller further comprises an outer elastic shell located outside the plurality of inner elastic shells, the inner elastic shells being expanded to abut against inner side walls of the outer elastic shells to expand the outer elastic shells.

Through adopting above-mentioned scheme, when the intracavity is carried to holding of the inside elastic sleeve of medium injection member, the inside interior elastic sleeve of outer elastic sleeve is put pressure on outer elastic sleeve after the inflation, props the outer elastic sleeve that expands for outer elastic sleeve is along with the inflation of the interior elastic sleeve of corresponding position and when the expansion rises, outer elastic sleeve passes through gradually between two adjacent interior elastic sleeves, and when the respective inflation degree of a plurality of interior elastic sleeves is different with the position, outer elastic sleeve just demonstrates different shapes. When the device is used, the shape of the outer elastic sleeve is adjusted according to the wrinkle distribution area on the strip, then the maximum diameter position of the expanded outer elastic sleeve corresponds to the area which is most prone to wrinkle on the strip, the larger diameter position of the outer elastic sleeve corresponds to the area which is more prone to wrinkle on the strip, the minimum diameter position of the outer elastic sleeve corresponds to the area which is not prone to wrinkle on the strip, and the expansion degree of the outer elastic sleeve is gradually transited between the two adjacent inner elastic sleeves, so that the extrusion force of the outer elastic sleeve on each area of the strip is gradually changed, the extension degrees of the strip on different areas are different, the smooth transition of the extension degrees between different areas can be guaranteed, the situation that the extension degrees between different areas of the strip are suddenly changed to damage the strip is avoided, and the flatness of the strip is improved. When this remove wrinkle roller is used for the tensioning pole piece, the biggest position department of the diameter of the outer elastic sleeve of inflation corresponds with the blank district of pole piece, and the outer elastic sleeve of inflation contacts and extrudees the pole piece with the pole piece for remove wrinkle roller and carry out the tensioning of different degrees to the blank district and the coating district of pole piece, thereby make and leave the blank district and carry out synchronous extension with the coating district, thereby reduce the production of fold.

In some embodiments, the wrinkle removal roller further comprises a plurality of outer elastic sleeves, each outer elastic sleeve being located outside one of the inner elastic sleeves, the inner elastic sleeves being expanded against the inner side walls of the outer elastic sleeves to expand the outer elastic sleeves.

By adopting the scheme, the medium is conveyed to the inner elastic sleeve by the medium injection piece, the outer elastic sleeve expands along with the expansion of the inner elastic sleeve on the inner side of the outer elastic sleeve, the outer elastic sleeve directly contacts with the belt material to extrude the belt material, the inner elastic sleeve is prevented from directly contacting with the belt material, and therefore the inner elastic sleeve is protected.

In some embodiments, a plurality of pressure pipelines corresponding to the inner elastic sleeve are arranged in the rotating shaft, one end of each pressure pipeline is connected with the containing cavity, the other end of each pressure pipeline is connected with the output end of the medium injection piece, and the medium injection piece conveys a medium into the containing cavity through the pressure pipelines.

By adopting the scheme, each pressure pipeline becomes a conveying channel for conveying the medium to the corresponding accommodating cavity by the medium injection part, the medium quantity conveyed to the accommodating cavity can be controlled by controlling the medium flow on the pressure pipeline, and the pressure pipelines are arranged in the rotating shaft, so that the space utilization is reasonable and the structure is compact.

In some embodiments, the rotating shaft is provided with a plurality of conveying through holes corresponding to the inner elastic sleeves, one end of each conveying through hole is communicated to the accommodating cavity, the other end of each conveying through hole is communicated with the output end of the medium injection piece, and the medium injection piece conveys a medium into the accommodating cavity through the conveying through holes.

By adopting the scheme, each conveying through hole is directly used as a conveying channel for conveying the medium to the corresponding accommodating cavity by the medium injection piece, so that the wrinkle removing roller has few parts and simple structure.

In some embodiments, the outer elastic sleeve is made of rubber, and/or the inner elastic sleeve is made of rubber, and the elastic modulus of the outer elastic sleeve is larger than that of the inner elastic sleeve.

Through adopting above-mentioned scheme, outer elastic sleeve deformation is more stable, and the deformation degree transition of different positions is mild for the extrusion force between the different positions of strip changes slowly, is difficult to harm the strip, and the interior elastic sleeve or the outer elastic sleeve material of rubber material are soft, are difficult to crowded band of hindering.

In some embodiments, the medium output by the medium injector comprises a gas or a liquid.

By adopting the scheme, the medium injection piece can be an air pump which outputs compressed air to generate air pressure, and the inner wall of the accommodating cavity can expand the inner elastic sleeve under the action of the air pressure; the medium injection member can also be a hydraulic pump which outputs a liquid medium, the inner wall of the accommodating cavity can expand the inner elastic sleeve under the hydraulic action, and the liquid medium can be water or oil or a water-oil mixed solution and the like; the pneumatic medium and the hydraulic medium are common media, and the cost is low.

A second aspect of the embodiments of the present application provides a pole piece wrinkle removing device, which includes a servo motor, a control device, and a wrinkle removing roller according to any one of the embodiments of the above subject, wherein the servo motor drives the wrinkle removing roller to rotate; the control device is electrically connected with the servo motor and is used for controlling whether the servo motor drives the rotating shaft to rotate or not; the control device is also connected with the medium injection member and is used for controlling whether the medium injection member outputs the medium or not.

By adopting the scheme, the control device controls the opening and closing of the servo motor, the rotating shaft is driven to rotate when the servo motor is started, the rotating shaft drives the inner elastic sleeve to rotate, the pole piece moves in a direction perpendicular to the axial direction of the rotating shaft, the blank area of the pole piece is in contact with the inner elastic sleeve, and the inner elastic sleeve applies pressure to the blank area while in contact with the blank area, so that the blank area of the pole piece is longitudinally extended by the inner elastic sleeve; the control device also controls whether the medium injection member conveys the medium to the accommodating cavity, and because the amount of the medium conveyed to the accommodating cavity determines the expansion degree of the inner elastic sleeve, the larger the amount of the medium conveyed to the accommodating cavity is, the larger the expansion degree of the inner elastic sleeve is, the larger the pressure is applied to the blank area of the pole piece, and the larger the longitudinal extension amount of the blank area is, so that whether the medium injection member conveys the medium to the accommodating cavity is controlled by the control device, the extension amount of the blank area of the pole piece can be indirectly controlled, the extension degree of the blank area can be consistent with the extension degree of the corresponding coating area, and the effect of reducing the wrinkles of the blank area is achieved.

Compared with the prior art, the beneficial effects of this application are as follows:

the wrinkle removing roller is provided with the plurality of inner elastic sleeves on the rotating shaft, the medium injection piece respectively conveys media into the plurality of inner elastic sleeves, the inner elastic sleeves are inflated with the media and then expand, so that the wrinkle removing roller is formed into a sectional structure, the position diameter of the wrinkle removing roller corresponding to the inner elastic sleeves is larger and is used for extending an area which is easy to wrinkle on a strip material, and the position diameter of the wrinkle removing roller corresponding to the outer elastic sleeves is smaller and is used for tensioning the area which is not easy to wrinkle on the strip material; the quantity of the medium conveyed into the inner elastic sleeves by the medium injection piece can be controlled according to the distribution position of the wrinkles on the strip and the difference between the extension degrees of the areas which are easy to generate the wrinkles and are not easy to generate the wrinkles, so that the expansion degree of the inner elastic sleeves can be controlled, all the inner elastic sleeves can be combined in a certain mode, and the accurate and effective extension of the areas which are possibly generated with the wrinkles on the strip by the whole wrinkle removing roller is realized; when this remove wrinkle roller with the tensioning pole piece, the district contact of leaving white of the interior elastic sleeve that will expand and pole piece is opened up the paper-back edition to the extension degree that makes to leave white district can be unanimous rather than the coating district extension degree that corresponds, can reduce the fold of pole piece in leaving white district, has avoided the emergence of leaving white district welding fracture of pole piece, guarantees the security of battery.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and the embodiments of the present application can be implemented in accordance with the content of the description so as to make the technical means of the embodiments of the present application more clearly understood, and the detailed description of the present application will be given below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a wrinkle removing roller and a corresponding pole piece thereof according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of another wrinkle removing roller and a corresponding pole piece provided in the embodiment of the present application;

FIG. 3 is a schematic structural diagram of an inner elastic sleeve according to an embodiment of the present disclosure;

FIG. 4 is another schematic structural diagram of an inner elastic sleeve provided in the embodiments of the present application;

fig. 5 is a schematic structural diagram of a wrinkle removing roller with an outer elastic sleeve and a corresponding pole piece according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of another wrinkle removing roller with an outer elastic sleeve and a corresponding pole piece according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another wrinkle removing roller with an outer elastic sleeve and a corresponding pole piece according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of another wrinkle removing roller with an outer elastic sleeve according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a pressure line provided in an embodiment of the present application;

FIG. 10 is a schematic structural diagram of another pressure line provided in an embodiment of the present application;

fig. 11 is a schematic structural diagram of a conveying through hole provided in an embodiment of the present application;

reference numerals are as follows: 1-rotating shaft, 2-inner elastic sleeve, 21-containing cavity, 3-outer elastic sleeve, 41-pressure pipeline, 42-conveying through hole, 10a, 20a, 30a, 40a and 50 a-blank area of pole piece, 10b, 20b, 30b, 40b and 50 b-coating area of pole piece and 5-medium injection piece.

Detailed Description

The following detailed description of the present application is provided in conjunction with the accompanying drawings, and it should be understood that the scope of the present application is not limited to the specific embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection 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 in the description of the application 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 and claims of this application and the description of the drawings are intended to cover, but not to exclude, other elements. The word "a" or "an" does not exclude a plurality.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" 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. One skilled in the art will explicitly or implicitly appreciate that the embodiments described herein can be combined with other embodiments.

The directional words appearing in the following description are directions shown in the drawings, and do not limit the specific structure of the wrinkle smoothing roller and the pole piece wrinkle smoothing device of the present application. For example, in the description 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", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, and are used only for convenience of description and for simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like in the description and claims of this application or in the foregoing drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential order, and may explicitly or implicitly include one or more of the features.

In the description of the present application, unless otherwise specified, "a plurality" means two or more (including two), and similarly, "a plurality of groups" means two or more (including two).

In the description of the present application, it should be noted that, unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., "connected" or "connected" of a mechanical mechanism may refer to a physical connection, e.g., a physical connection may be a fixed connection, e.g., by a fastener, such as a screw, bolt, or other fastener; the physical connection can also be a detachable connection, such as a mutual clamping or clamping connection; the physical connection may also be an integral connection, for example, a connection made by welding, gluing or integrally forming the connection. "connected" or "connected" of circuit structures may mean not only physically connected but also electrically connected or signal-connected, for example, directly connected, i.e., physically connected, or indirectly connected through at least one intervening component, as long as the circuits are in communication, or communication between the interiors of two components; signal connection may refer to signal connection through a medium such as radio waves, in addition to signal connection through circuitry. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The battery is used as a product which is developed quickly in the new energy industry and is widely applied to digital products and the automobile industry. The basic unit of the battery is a battery monomer, the battery monomer comprises an electrode assembly, the electrode assembly comprises a positive pole piece and a negative pole piece, and the battery monomer works mainly by means of movement of metal ions between the positive pole piece and the negative pole piece. The positive pole piece is formed by uniformly and continuously coating positive active substances on a positive current collector, and the positive current collector which is not coated with the positive active substances is used as a positive pole lug. The negative pole piece is formed by uniformly and continuously coating a negative active material on a negative current collector, and the negative current collector which is not coated with the negative active material is used as a negative pole tab. Taking a lithium ion battery as an example, the positive electrode current collector can be an aluminum foil, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate and the like; the negative electrode current collector may be a copper foil, and the negative electrode active material may be carbon, silicon, or the like.

The thickness of the current collector of the lithium ion battery is generally between 6 and 13 microns (micrometers), after the active substance is coated, the thickness of the coating area is greater than that of the blank area, and rolling is a necessary process in the manufacturing process of the lithium ion battery in order to obtain a pole piece meeting parameters. Specifically, in the production process of the lithium ion battery, the pole piece structure just coated with the active material is fluffy, the combination between the active material and the current collector is not firm, the active material layer is easy to fall off, the pole piece needs to be rolled so that the active material layer is more compact, and can be firmly attached to the current collector, and the energy density of the battery can be improved. With the demand of high capacity of lithium ion batteries, the requirement of the compacted density of the pole piece is higher and higher. In the rolling process of the pole piece, the thickness of the coating area is reduced by the pressure of the roller, the length of the pole piece is increased along with the rolling effect, and the thickness of the blank area is not changed and the length is not changed because the thickness of the blank area is smaller and the roller can not be pressed. Therefore, the coating area and the blank area of the pole piece have different extension degrees after being rolled, so that the blank area generates wrinkles, and the wrinkles of the blank area can bring serious influence to the subsequent manufacturing of the lithium ion battery, cause adverse effects such as pole piece welding fracture and the like, and seriously influence the safety of the battery.

Therefore, the blank areas of the pole pieces need to be stretched to flatten the wrinkles, so as to prevent the above-mentioned consequences. At present, the method for solving the problem of pole piece wrinkles in the rolling process mainly comprises the following steps:

(1) the pole piece is extruded from the corresponding position of the blank area through one or a plurality of cylindrical rollers or bending rollers in the advancing process of the pole piece, so that the blank area of the pole piece is expanded and flattened; however, such methods have problems in that: the cylinder roller and the bending roller can only have an effect on a blank area at a corresponding position, a plurality of cylinder rollers or bending rollers need to be arranged on the pole piece with a plurality of blank areas, the cylinder rollers or the bending rollers with different lengths need to be replaced in the blank areas with different widths, and the application range is narrow and the flexibility is poor.

(2) The pole piece is integrally stretched by larger tension before and after the main roller of the roller press is carried out on the pole piece; however, this method has problems that: the large tension easily causes the pole piece to break, and the production efficiency and the yield are influenced.

(3) The Teflon is artificially adhered to a roller passing through the pole piece in the advancing process, so that the diameter of the section part adhered with the Teflon is larger than that of the section part not adhered with the Teflon, and the roller can contact and extrude the blank area of the pole piece through the height difference of the roller surface so as to eliminate or reduce the wrinkles of the blank area; however, such methods have problems in that: production personnel need to enter the equipment for operation, potential safety hazards exist, personnel pasting methods are different, and flattening and wrinkle removing effects are different greatly.

In view of the above problem, the embodiment of the application provides a wrinkle chasing roller and pole piece wrinkle chasing device, and it can all extrude the extension to a whitewashed district or a plurality of whitewashed districts that leave on the pole piece to extrusion extension degree and scope are adjustable, and application scope is wide, and the flexibility is high, and the exhibition is flat removes wrinkle effect stability, has improved production efficiency and yields.

The wrinkle removing roller provided by the embodiment of the application is used for tensioning a strip material, and comprises a medium injection part 5, a rotating shaft 1 and a plurality of inner elastic sleeves 2, as shown in figure 1. The inner elastic sleeves 2 are respectively arranged on the periphery of the rotating shaft 1, the inner elastic sleeves 2 are arranged along the axis direction of the rotating shaft 1, and each inner elastic sleeve 2 can be filled with a medium to expand, so that the contact position of the strip and the inner elastic sleeve 2 is extended, and the strip is prevented from being wrinkled; the medium injection member 5 is used for outputting a medium to expand the plurality of inner elastic sleeves 2.

The tapes in the examples of the present application may be: for convenience of description, the embodiment and effect of the wrinkle removing roller are described in the present application by taking the pole piece of the battery as an example. The wrinkle removing roller can be arranged after the pole piece rolling procedure and can tension and flatten the pole piece before wrinkles in the blank area become dead wrinkles, and at the moment, although the coating area of the pole piece is expanded in the rolling procedure to enable the blank area to generate wrinkles, the pole piece is not completely dried, so that the wrinkles can be flattened after external force is applied to the blank area through the wrinkle removing roller; the wrinkle removing roller can also be arranged before the pole piece rolling procedure, the blank area does not generate wrinkles at the moment, the blank area and the coating area of the pole piece are tensioned to different degrees through the wrinkle removing roller, so that the blank area is expanded, the coating area is not expanded or the expansion amount is less than that of the blank area, the part of the blank area, which is less than that of the coating area, in the subsequent rolling procedure is offset, so that the expansion degrees of the blank area and the coating area are close to the same after the rolling procedure, and the wrinkles are reduced.

The rotating shaft 1 is a cylindrical member capable of rotating around its own axis, and the material of the rotating shaft can be metal material or hard plastic.

The medium injection member 5 can be an air pump or a hydraulic pump, the output end of the air pump delivers compressed gas medium, and the output end of the hydraulic pump delivers liquid medium. The medium injection member 5 can have a plurality of output ends, each output end is respectively communicated with one inner elastic sleeve 2, the medium injection member 5 is opened, the medium injection member 5 simultaneously conveys the medium to the plurality of inner elastic sleeves 2, and after the medium injection member 5 is closed, the medium conveying to each inner elastic sleeve 2 is simultaneously stopped, under the condition, the medium amount in the plurality of inner elastic sleeves 2 is basically equal, so that the expansion amount of each inner elastic sleeve 2 is basically equal under the condition that the material and the size of each inner elastic sleeve 2 are consistent; a plurality of output ends of the medium injection member 5 may also be respectively provided with a control valve, when the control valve on any output end is opened, the medium injection member 5 transmits the medium to the corresponding inner elastic sleeve 2 through the output end thereof, and when the control valve is closed, the medium injection member 5 stops transmitting the medium to the corresponding inner elastic sleeve 2 through the output end, so that the amount of the medium in the plurality of inner elastic sleeves 2 may be unequal by controlling the opening and closing of each control valve, that is, the expansion degree of the plurality of inner elastic sleeves 2 may be unequal.

The inner elastic sleeve 2 is made of a high-elasticity material with reversible deformation, can generate large deformation under the action of a medium, and can recover the original shape after external force is removed. The interval can have between a plurality of interior elastic sleeve 2, and when using, the part between the interior elastic sleeve 2 after adjacent inflation is corresponding with the coating district of pole piece, and the arrangement position of interior elastic sleeve 2 is corresponding with the margin district of pole piece, and its quantity is unanimous with the margin district quantity of pole piece, according to the coating district with the thickness difference who leaves the margin district, the inflation degree of elastic sleeve 2 in the control for interior elastic sleeve 2 can the tensioning leave the margin district and make and leave the margin district and take place the extension.

The inner elastic sleeves 2 of the wrinkle removing roller are independent of each other, and the inner elastic sleeves 2 are not affected, so that the inner elastic sleeves 2 at different positions of the axial direction of the rotating shaft 1 are expanded, and the blank areas of the pole pieces at different positions can be tensioned to enable the pole pieces to longitudinally extend. For example, as shown in fig. 1, a strip-shaped lithium battery pole piece has three blank regions 10a and two coating regions 10b in the transverse direction, and the blank regions 10a and the coating regions 10b are arranged at intervals; the wrinkle removing roller is arranged after a pole piece rolling procedure and comprises five inner elastic sleeves 2, a medium injection piece 5 conveys media into three inner elastic sleeves 2, the three inner elastic sleeves 2 corresponding to three blank leaving areas 10a are expanded to form bulges, the other two inner elastic sleeves 2 are not conveyed with the media, so the other two inner elastic sleeves 2 are attached to the outer wall of the rotating shaft 1 under the action of self elastic force, when the wrinkle removing roller works, the three blank leaving areas 10a of the pole piece are expanded, the expansion degree is controlled by controlling the amount of the media input into the inner elastic sleeves 2, the expansion degree of the three blank leaving areas is basically consistent with the expansion degree of a coating area in the rolling procedure, and wrinkles of the blank leaving areas are reduced.

The wrinkle removing roller is high in applicability and can still exert effects after the position of the blank area of the pole piece is changed. For example, after the pole piece wrinkle removing device removes wrinkles from the first pole piece, the pole piece is replaced by a second pole piece, which comprises three coating areas 20b and two blank areas 20a between the three coating areas, as shown in fig. 2; the wrinkle removing roller is adapted to a second pole piece, a medium is injected into the inner elastic sleeves 2 corresponding to the two blank areas 20a by the medium injection piece 5, the two inner elastic sleeves 2 corresponding to the two blank areas 20a are expanded, and the other three inner elastic sleeves 2 are not conveyed with the medium, so that the other three inner elastic sleeves 2 are attached to the outer wall of the rotating shaft 1 under the action of self elastic force, when the wrinkle removing roller of the pole piece wrinkle removing device works, the two blank areas 20a of the pole piece are extended, and the expansion degree is controlled by controlling the amount of the medium input into the inner elastic sleeves 2, so that the extension degree of the two blank areas is basically consistent with the extension degree of the coating area in the rolling process, and the wrinkles of the blank areas are reduced.

By adopting the scheme, the medium injection piece 5 of the wrinkle removing roller conveys the medium into one or more of the inner elastic sleeves 2, so that the inner elastic sleeves 2 are expanded; the relative position of the band and the inner elastic sleeve 2 is adjusted so that the expanded inner elastic sleeve 2 corresponds to the area where the band is prone to wrinkle. When this wrinkle chasing roller is used for the tensioning pole piece, the axial of pole piece perpendicular to pivot 1 moves, and pivot 1 rotates, its diameter grow of interior elastic sleeve 2 after the inflation, and the interior elastic sleeve 2 of inflation is exerted pressure to the pole piece to make and leave white district extension, and then in pole piece roll-in process, make and leave white district unanimous with coating district extension degree, thereby reduce the fold of leaving white district. Moreover, the expansion degree of the inner elastic sleeve 2 can be controlled by controlling the medium quantity conveyed into the accommodating cavity 21 corresponding to the inner elastic sleeve 2 by the medium injection part 5, so that the extrusion extension degree of the inner elastic sleeve 2 to the pole piece is adjustable, and the expanded inner elastic sleeve 2 keeps a fixed radius, so that when the pole piece is subjected to wrinkle removal, a stable wrinkle removal effect can be kept, and the production efficiency and the yield are improved; in addition, the pole pieces corresponding to the positions of the inner elastic sleeves 2 and the pole pieces with different widths can be rolled to remove wrinkles, and the rolling device is wide in application range and high in flexibility.

In some embodiments, the inner elastic sleeve 2 has a receiving cavity 21, and the receiving cavity 21 is used for receiving the medium output by the medium injector 5.

By adopting the scheme, the medium injection member 5 outputs the medium, the medium fills the accommodating cavity 21, and the medium applies pressure to the inner wall of the inner elastic sleeve 2, so that the inner elastic sleeve 2 can expand.

Referring to fig. 3, in some embodiments, the inner elastic sleeve 2 is a hollow annular structure, and the receiving cavity 21 is a cavity formed between an inner diameter and an outer diameter of the inner elastic sleeve 2, wherein the inner diameter of the inner elastic sleeve 2 is disposed outside the rotating shaft 1.

Interior elastic sleeve 2 is whole to be the annular around pivot 1, holds chamber 21 for the annular space around pivot 1, and the size that holds chamber 21 changes along with interior elastic sleeve 2's inflation degree, for example, when holding chamber 21 internal filling medium more, when interior elastic sleeve 2 inflation volume is great, the space that holds chamber 21 just can be great, and when holding chamber 21 internal filling medium less, interior elastic sleeve 2 inflation volume is less, and the space that holds chamber 21 just can be less.

The inner diameter of the inner elastic sleeve 2 refers to the part with the smallest diameter after the inner elastic sleeve 2 is expanded, and the outer diameter of the inner elastic sleeve 2 refers to the part with the largest diameter after the inner elastic sleeve 2 is expanded, wherein both the inner diameter and the outer diameter of the inner elastic sleeve 2 can be changed along with the expansion amount of the inner elastic sleeve 2.

It should be noted that, because the inner diameter of the inner elastic sleeve 2 is set on the rotating shaft 1, after the inner elastic sleeve 2 expands to a certain extent, the inner diameter of the inner elastic sleeve 2 will be attached to the outer peripheral wall of the rotating shaft 1 and cannot be reduced further, and at this time, the inner elastic sleeve 2 can be stably fixed on the rotating shaft 1. The outer diameter of the inner elastic sleeve 2 is the maximum diameter of the wrinkle removing roller, so the outer diameter of the inner elastic sleeve 2 can be set according to the distance between the wrinkle removing roller and the pole piece and the thickness difference between the blank area on the pole piece and the coating area, for example, when the pole piece is far away from the wrinkle removing roller or the height difference between the blank area on the pole piece and the coating area is large, more media can be filled into the accommodating cavity 21, so that the outer diameter of the inner elastic sleeve 2 is large enough to contact the blank area of the pole piece, and the blank area is extruded to be expanded. Conversely, less medium can be filled into the receiving chamber 21 to reduce the extent of the margin.

By adopting the scheme, when the medium injection member 5 outputs the medium, the medium enters the accommodating cavity 21, and the medium presses the inner wall of the inner elastic sleeve 2 to expand the inner elastic sleeve 2. The sealing performance of the accommodating cavity 21 is only related to the self sealing performance of the inner elastic sleeve 2, and the inspection is convenient when the medium leaks; and, interior elastic sleeve 2 can be along axial displacement in pivot 1, and the position of elastic sleeve 2 in the adjustment conveniently extrudees the wrinkle removal to the margin district of different positions on the pole piece for the wrinkle removal roller can be applicable to the pole piece that has different margin districts and coating district, and is nimble convenient.

As shown in fig. 4, in some embodiments, both end portions of the inner elastic sleeve 2 in the axial direction of the rotating shaft 1 are disposed on the outer periphery of the rotating shaft 1, and the accommodating chamber 21 is a chamber formed between the inner wall of the inner elastic sleeve 2 and the outer peripheral wall of the rotating shaft 1.

The inner elastic sleeve 2 can be sleeved on the outer portion of the rotating shaft 1, the two end portions of the inner elastic sleeve 2 in the axial direction of the rotating shaft 1 and the rotating shaft 1 can be fixedly connected in an adhesive mode, and the strap can also be used for fastening and fixedly connecting, so that the sealing performance of the accommodating cavity 21 is guaranteed.

By adopting the scheme, the space formed between the inner wall of the inner elastic sleeve 2 and the outer peripheral wall of the rotating shaft 1 forms a cavity of the accommodating cavity 21, when the medium injection piece 5 outputs a medium, the medium enters the accommodating cavity 21, and the medium applies pressure to the inner elastic sleeve 2 to expand the inner elastic sleeve 2. Constitute this interior elastic sleeve 2 and the 1 fixed connection of pivot that hold chamber 21, so interior elastic sleeve 2 rigidity on pivot 1, remove the wrinkle roller at the during operation, receive external force extrusion back as interior elastic sleeve 2, be difficult to produce and remove or rock to provide comparatively stable tensile force for the fixed position of pole piece in fixed position.

In some embodiments, as shown in figure 5, the creasing roller further comprises an outer elastomeric sleeve 3, the outer elastomeric sleeve 3 being located externally of a plurality of inner elastomeric sleeves 2, the inner elastomeric sleeves 2 being inflated against the inner side walls of the outer elastomeric sleeves 3 to expand the outer elastomeric sleeves 3.

The outer elastic sleeve 3 may be fixedly connected with the rotating shaft 1, or may be sleeved on the rotating shaft 1, which is not limited in the embodiment of the present application. The connection between the outer elastic sleeve 3 and the rotating shaft 1 does not need to consider the sealing problem, and the outer elastic sleeve 3 is expanded along with the expansion of the plurality of inner elastic sleeves 2 at the inner side of the outer elastic sleeve.

When the wrinkle removing roller is used for tensioning the pole pieces, the expanded inner elastic sleeve 2 applies pressure to the pole pieces, and the maximum diameter position of the expanded outer elastic sleeve 3 corresponds to a blank area 30a of the pole pieces, for example, as shown in fig. 5, a strip-shaped lithium battery pole piece is provided with a blank area 30a along the length direction, and two sides of the blank area 30a are respectively provided with a coating 30 b; the wrinkle removing roller for the pole piece is arranged after a pole piece rolling procedure and comprises an outer elastic sleeve 3 and five inner elastic sleeves 2, wherein the outer elastic sleeve 3 is positioned outside all the inner elastic sleeves 2. The pole piece may be in any one of three situations.

In the first case, as shown in FIG. 5, when the widths of the coatings 30b on both sides of the margin 30a are equal, the margin 30a is located at the middle position in the width direction of the pole piece; the medium injection member 5 except the crumpling roller conveys the medium to the respective accommodating cavities 21 of the five inner elastic sleeves 2, so that the five inner elastic sleeves 2 are expanded, the inner elastic sleeve 2 in the middle is expanded to the maximum, the two inner elastic sleeves 2 adjacent to the middle are expanded to the small, the inner elastic sleeve 2 at the two ends of the outermost side is expanded to the minimum, the five expanded inner elastic sleeves 2 apply different degrees of pressure to the inner wall of the outer elastic sleeve 3, so that the outer elastic sleeve 3 is expanded, and the overall shape of the expanded outer elastic sleeve 3 is in a shuttle shape with the middle protruding and axial symmetry. When the wrinkle removing roller works, the position with the largest diameter of the outer elastic sleeve 3 corresponds to the central area of the blank area 30a, from the position with the largest diameter of the outer elastic sleeve 3 to two sides, the wrinkle removing roller gradually extends from the position just opposite to the blank area 30a to the position just opposite to the coating 30b, from the center of the blank area 30a to the edge of the blank area 30a and then to the position just opposite to the coating 30b, and the diameter of the outer elastic sleeve 3 is gradually reduced, so that the extrusion force of the outer elastic sleeve 3 to the corresponding position of the pole piece is gradually reduced, the extension degree of the blank area 30a is larger than that of the coating 30b, and the extension degree is gradually changed, so that the wrinkles generated in the previous rolling link are tensioned and flattened, the wrinkles are reduced or even eliminated, and the pole piece cannot be damaged due to the sudden change of the extrusion force to the pole piece in the tensioning process.

In the second case, as shown in fig. 6, compared with the first case, the areas of the coating regions 40a on both sides of the blank region 40a of the pole piece are not equal, that is, the blank region 40a deviates from the middle position in the width direction of the pole piece, at this time, according to the width dimension of the coating regions 40a on both sides adjacent to the blank region 40a, the media fed from the media injector 5 to the respective receiving cavities 21 of the five inner elastic sleeves 2 are controlled, so that the 5 inner elastic sleeves 2 expand, the five expanded inner elastic sleeves 2 press the inner wall of the outer elastic sleeve 3, so that the outer elastic sleeve 3 is expanded, the expanded outer elastic sleeve 3 forms a column shape which is asymmetric along the axial center, the position where the diameter of the expanded outer elastic sleeve 3 is the largest corresponds to the blank region 40a of the pole piece, from the position where the diameter of the outer elastic sleeve 3 is the largest to both sides, the wrinkle-removing roller gradually extends from the position where the blank region 40a is opposite to the coating region 40a opposite, and the position where the diameter of the outer elastic sleeve 3 is the largest is opposite to the direction of the opposite ends of the wrinkle-removing roller, the longer end of the outer elastic sleeve 3 corresponds to the coating area 40a with the larger area on one side of the blank area 40a, and the shorter end of the outer elastic sleeve 3 corresponds to the coating area 40a with the smaller area on one side of the blank area 40a, so that the shape change of the outer elastic sleeve 3 is adapted to the widths and positions of the blank area 40a and the coating area 40a on the pole piece, and the effect of flattening the wrinkles of the pole piece comprising the coating areas 40a with different widths is realized.

In the third case, the pole piece has a plurality of blank regions with respect to the first and second cases, as shown in fig. 7, and a pole piece includes two blank regions 50a and three coated regions 50b, with the blank regions and the coated regions being spaced apart. In this case, the medium injector 5 is enabled to convey the medium into the accommodating cavities 21 of the second and fourth inner elastic sleeves 2, the second and fourth inner elastic sleeves 2 are both expanded, and the accommodating cavities 21 of the other inner elastic sleeves 2 are not conveyed with the medium, so that the other inner elastic sleeves 2 are attached to the outer wall of the rotating shaft 1 under the action of the self elastic force, the inner elastic sleeves 2 support and expand the outer elastic sleeves 3, the outer elastic sleeves 3 are protruded at the corresponding positions of the second and fourth inner elastic sleeves 2, and the two protrusions correspond to the two blank areas 50a of the pole piece. When the wrinkle removing roller works, the positions with different diameters of the outer elastic sleeve 3 apply pressure with different forces to the two blank areas 50a and the two coating areas 50b of the pole piece, so that the extension of the blank areas is larger than that of the coating areas. Therefore, the wrinkles generated in the previous rolling link are tensioned and flattened, and the wrinkles are reduced.

In some embodiments, as shown in figure 8, the wrinkle removal roller further comprises a plurality of outer elastic sheaths 3, each outer elastic sheath 3 being located outside one of the inner elastic sheaths 2, the inner elastic sheath 2 being expanded to abut against the inner side walls of the outer elastic sheath 3 to expand the outer elastic sheath 3.

Through adopting above-mentioned scheme, because interior elastic sleeve 2 can normally expand and directly influence the roll-in effect of removing the wrinkle roller to the strip, consequently if in roll-in process interior elastic sleeve 2 takes place to damage and unable normal inflation, then whole equipment need be shut down and is maintained, seriously influence production efficiency, consequently, set up outer elastic sleeve 3 at interior elastic sleeve 2 skin, medium injection member 5 carries the medium to interior elastic sleeve 2, outer elastic sleeve 3 expands along with its inboard interior elastic sleeve 2, outer elastic sleeve 3 can play the guard action to interior elastic sleeve 2, the life of elastic sleeve 2 in the extension, after outer elastic sleeve 3 damages, interior elastic sleeve 2 can also continue to use, thereby need not equipment and shut down the maintenance, production efficiency is improved.

Referring to fig. 9, in some embodiments, a plurality of pressure pipelines 41 corresponding to the inner elastic sleeve 2 are disposed in the rotating shaft 1, one end of each pressure pipeline 41 extends into the accommodating cavity 21, the other end of each pressure pipeline 41 is connected to an output end of the medium injector 5, and the medium injector 5 delivers a medium into the accommodating cavity 21 through the pressure pipelines 41.

It will be appreciated that a cavity is provided in the shaft 1 for the pressure line 41 to pass through. As shown in fig. 9, there may be only one cavity, the inner wall of the cavity is provided with a plurality of ducts extending to the outer wall of the rotating shaft 1, and a plurality of pressure pipelines 41 extend from the medium injection member 5 into the cavity, extend to the outer wall of the rotating shaft 1 through the ducts respectively, and communicate with the accommodating cavity 21 of the inner elastic sleeve 2 to convey the medium into the corresponding inner elastic sleeve 2. As shown in fig. 10, a plurality of cavities may be provided, and the plurality of cavities are independent from each other and respectively extend from one end of the rotating shaft 1 close to the medium injector 5 to the outer wall of the rotating shaft 1, and are communicated with the accommodating cavity 21 of the inner elastic sleeve 2 outside the outer wall of the rotating shaft 1 to convey the medium into the corresponding inner elastic sleeve 2.

By adopting the above scheme, each pressure pipeline 41 becomes a conveying channel for conveying the medium from the medium injection member 5 to the corresponding accommodating cavity 21 of the inner elastic sleeve 2, the amount of the medium conveyed to the corresponding accommodating cavity 21 of the inner elastic sleeve 2 can be controlled by controlling the medium flow on the pressure pipeline 41, and the plurality of pressure pipelines 41 are arranged in the rotating shaft 1, so that the space utilization is reasonable and the structure is compact.

Referring to fig. 1, in some embodiments, the rotating shaft 1 is provided with a plurality of conveying through holes 42 corresponding to the inner elastic sleeve 2, one end of each conveying through hole 42 is communicated with the accommodating cavity 21, the other end of each conveying through hole 42 is communicated with the output end of the medium injection member 5, and the medium injection member 5 conveys a medium into the accommodating cavity 21 through the conveying through holes 42.

The conveying through hole 42 may be a circular hole, a square hole, or the like, and the extending path of the conveying through hole 42 in the rotating shaft 1 is not limited. When the medium injection device is used, the output end of the conveying through hole 42 can be directly communicated with the corresponding accommodating cavity 21 of the inner elastic sleeve 2, for example, when the inner elastic sleeve 2 and the side wall of the rotating shaft 1 jointly form the accommodating cavity 21, the medium output by the medium injection member 5 can directly enter the accommodating cavity 21 through the output end of the conveying through hole 42. When the medium injection device is used, a pipeline can be connected to the output end of the conveying through hole 42, one end of the pipeline, which is far away from the conveying through hole 42, is communicated with the accommodating cavity 21 corresponding to the inner elastic sleeve 2, for example, when the inner diameter and the outer diameter of the inner elastic sleeve 2 jointly form the annular accommodating cavity 21, the pipeline connected to the output end of the conveying through hole 42 can be communicated into the accommodating cavity 21 of the inner elastic sleeve 2 in the above manner, after a medium conveyed by the medium injection member 5 flows out from the output end of the conveying through hole 42, the accommodating cavity 21 can be reached through the pipeline, but the setting position of the inner elastic sleeve 2 no longer needs to accurately correspond to the output end of the conveying through hole 42, and therefore, the flexibility of the installation of the inner elastic sleeve 2 is stronger.

By adopting the above scheme, each delivery through hole 42 becomes a delivery channel for delivering the medium from the medium injector 5 to the corresponding accommodating cavity 21 of the inner elastic sleeve 2, the amount of the medium delivered to the accommodating cavity 21 of the inner elastic sleeve 2 can be controlled by controlling the flow rate of the medium in the delivery through hole 42, and the rotating shaft 1 is provided with a plurality of delivery channels for delivering the medium through the delivery through holes 42, so that the parts are few, and the structure is simple.

As shown in fig. 1, in some embodiments, the medium injector 5 is connected to the conveying through holes 42 through input pipes, one end of each input pipe is connected to the output end of the medium injector 5, the other end of each input pipe is connected to the input end of one conveying through hole 42, each input pipe may be provided with a control valve, and the amount of the medium conveyed into the accommodating cavity 21 corresponding to each inner elastic sleeve 2 may be controlled by controlling the opening and closing of the control valve, so as to achieve the effect of controlling the expansion degree of each inner elastic sleeve 2.

As shown in fig. 1, in some embodiments, the medium injector 5 may have a plurality of output ends, each output end of the medium injector 5 corresponds to one inner elastic sleeve 2, and by controlling the time when the medium injector 5 outputs the medium, the amount of the medium to be delivered to the accommodating cavity 21 corresponding to each inner elastic sleeve 2 can be controlled, thereby controlling the expansion degree of each inner elastic sleeve 2.

In some embodiments, the outer elastic sleeve 3 is made of rubber, and/or the inner elastic sleeve 2 is made of rubber, and the elastic modulus of the outer elastic sleeve 3 is greater than that of the inner elastic sleeve 2.

The above scheme includes three cases: the outer elastic sleeve 3 is made of rubber, and the inner elastic sleeve 2 is not made of rubber; the inner elastic sleeve 2 is made of rubber material, and the outer elastic sleeve 3 is not made of rubber material; the inner elastic sleeve 2 and the outer elastic sleeve 3 are made of rubber.

The elastic modulus can be regarded as an index for measuring the degree of difficulty of the material in elastic deformation, and the larger the value of the elastic modulus, the larger the force required to elastically deform the material to a certain extent, that is, in the case of a certain applied force, the larger the value of the elastic modulus, the smaller the elastic deformation of the material, and the smaller the value of the elastic modulus, the larger the elastic deformation of the material.

By adopting the scheme, under the same stress action, the deformation amount of the outer elastic sleeve 3 is smaller than that of the inner elastic sleeve 2, and a more stable shape can be obtained after the outer elastic sleeve 3 expands; and the rubber material is a common elastic material, is soft and is not easy to crush the belt materials.

In some embodiments, the medium output by the medium injector 5 comprises a gas or a liquid.

The medium injector 5 may be an air pump, the air pump outputs compressed air to increase the air pressure in the accommodating cavity 21, and the inner wall of the inner elastic sleeve 2 expands the inner elastic sleeve 2 under the action of the air pressure, and it is understood that the input air may be air, nitrogen, carbon dioxide or water vapor.

The medium injection member 5 may also be a hydraulic pump which outputs a liquid medium, the inner wall of the accommodating cavity 21 can expand the inner elastic sleeve 2 under the action of hydraulic pressure, and the liquid medium may be water or oil or a water-oil mixed solution and the like.

Of course, the medium may also be a gas-liquid mixture, a solid-gas mixture, a solid-liquid mixture, or the like, and the examples of the present application are not listed.

Gaseous medium and liquid medium are common medium, and are with low costs, easily acquire to the inflation shape influence of interior elastic sleeve 2 is less, when interior elastic sleeve 2 extrudees the strip and produces the deformation, holds the deformation that the medium in the chamber 21 can adapt to interior elastic sleeve 2, makes the wrinkle chasing roller have stable wrinkle chasing effect to the strip.

In a second aspect of the embodiment of the present application, a pole piece wrinkle removing device is provided, which includes a servo motor, a control device, and the wrinkle removing roller of the above embodiment, wherein the servo motor drives the rotating shaft 1 to rotate; the control device is electrically connected with the servo motor and is used for controlling whether the servo motor drives the rotating shaft 1 to rotate or not; the control device is also connected with the medium injection member 5 and is used for controlling whether the medium injection member 5 outputs the medium or not.

The servo motor is a rotating motor, in order to reduce the speed of the output end of the servo motor, the output end of the servo motor can be connected with a speed reducer, and the output end of the speed reducer is connected with the rotating shaft 1 and drives the rotating shaft 1 to rotate. Through controlling means and servo motor electricity connection, not only can control servo motor whether rotatory, can also control the rotatory rotational speed size of servo motor for the rotational speed of wrinkle chasing roller can suit with the moving speed of strip, with the frictional force that reduces the strip, thereby has better wrinkle chasing effect to the strip.

The control device is connected with the medium injection member 5 to control whether the medium injection member 5 outputs the medium or not, so that the amount of the medium conveyed into the accommodating cavity 21 is controlled, the expansion degree of the inner elastic sleeve 2 is further controlled, the extrusion force between the inner elastic sleeve 2 and the surface of the strip material is controlled, and finally the extension degree of the corresponding position of the strip material is controlled, specifically, the more the amount of the medium conveyed into the accommodating cavity 21 is, the larger the expanded volume of the inner elastic sleeve 2 is, and the higher the pressure applied to the strip material is, and the higher the extension degree of the wrinkle position is in work; and vice versa.

By adopting the scheme, the control device controls the opening and closing of the servo motor, the servo motor drives the rotating shaft 1 to rotate when being started, the rotating shaft 1 drives the inner elastic sleeve 2 to rotate, and when a pole piece passes through the inner elastic sleeve 2, the inner elastic sleeve 2 longitudinally extends a blank area of the pole piece; the control device also controls the medium injection member 5 to convey the medium to the accommodating cavity 21, the medium conveyed to the accommodating cavity 21 enables the inner elastic sleeve 2 to expand, the blank area is pressed, the extension of the blank area is increased, the blank area is adaptive to the extension degree of the coating area, and the possibility of generating wrinkles on the pole piece is reduced or the pole piece is prevented from generating wrinkles.

The above disclosure is only for the specific embodiments of the present application, but the embodiments of the present application are not limited thereto, and any variations that can be considered by those skilled in the art are intended to fall within the scope of the present application.

Claims (11)

1. A de-wrinkling roller for tensioning a strip material, characterized in that: comprises a medium injection piece, a rotating shaft and a plurality of inner elastic sleeves;

the inner elastic sleeves are respectively arranged on the periphery of the rotating shaft and are distributed along the axial direction of the rotating shaft, and each inner elastic sleeve can be filled with a medium to expand;

the medium injection member is used for outputting the medium so that the medium is filled in the inner elastic sleeve.

2. The wrinkle removing roller as claimed in claim 1, characterized in that: the inner elastic sleeve is provided with an accommodating cavity which is used for accommodating the medium output by the medium injection piece.

3. The wrinkle removing roller as claimed in claim 2, characterized in that: the inner elastic sleeve is of an annular hollow structure, the accommodating cavity is a cavity formed between the inner diameter and the outer diameter of the inner elastic sleeve, and the inner diameter of the inner elastic sleeve is arranged outside the rotating shaft.

4. The wrinkle removing roller as claimed in claim 2, characterized in that: the inner elastic sleeve is arranged at the periphery of the rotating shaft at two axial ends of the rotating shaft, and the accommodating cavity is a cavity formed between the inner wall of the inner elastic sleeve and the peripheral wall of the rotating shaft.

5. The wrinkle removing roller as claimed in any one of claims 1-4, characterized in that: the wrinkle removing roller further comprises an outer elastic sleeve, the outer elastic sleeve is located outside the inner elastic sleeves, and the inner elastic sleeves are abutted to the inner side wall of the outer elastic sleeve after being expanded.

6. The wrinkle removing roller as claimed in any one of claims 1-4, characterized in that: the wrinkle removing roller further comprises a plurality of outer elastic sleeves, each outer elastic sleeve is located outside one inner elastic sleeve, and the inner elastic sleeves are abutted to the inner side walls of the outer elastic sleeves after being expanded.

7. The wrinkle removing roller as claimed in any one of claims 2-4, characterized in that: a plurality of pressure pipelines corresponding to the inner elastic sleeves are arranged in the rotating shaft, one end of each pressure pipeline is connected with the containing cavity, the other end of each pressure pipeline is connected with the output end of the medium injection piece, and the medium injection piece conveys media in the containing cavity through the pressure pipelines.

8. The wrinkle-removing roller as claimed in any one of claims 2 to 4, wherein: the rotating shaft is provided with a plurality of conveying through holes corresponding to the inner elastic sleeves, one ends of the conveying through holes are communicated with the accommodating cavity, the other ends of the conveying through holes are communicated with the output end of the medium injection piece, and the medium injection piece conveys a medium into the accommodating cavity through the conveying through holes.

9. The wrinkle removing roller as claimed in claim 5 or 6, characterized in that: the elastic modulus of the outer elastic sleeve is greater than that of the inner elastic sleeve.

10. The wrinkle removing roller as claimed in claim 1, characterized in that: the medium output by the medium injection member comprises gas or liquid.

11. The utility model provides a pole piece removes wrinkle device which characterized in that: comprising a servomotor, a control device and a wrinkle-removing roller according to any one of claims 1-10, said servomotor driving the rotation shaft in rotation;

the control device is electrically connected with the servo motor and is used for controlling whether the servo motor drives the rotating shaft to rotate or not;

the control device is also connected with the medium injection part and used for controlling whether the medium injection part outputs the medium or not.

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