CN220406640U

CN220406640U - Rolling device

Info

Publication number: CN220406640U
Application number: CN202321024729.3U
Authority: CN
Inventors: 李乐星; 刘金鹏; 戴玉龙; 谷丰; 张建昌
Original assignee: Chongqing Fudi Battery Research Institute Co ltd
Current assignee: Chongqing Fudi Battery Research Institute Co ltd
Priority date: 2023-04-28
Filing date: 2023-04-28
Publication date: 2024-01-30
Anticipated expiration: 2033-04-28

Abstract

The rolling device comprises a rolling assembly, a rolling assembly and a rolling assembly, wherein the rolling assembly is used for stretching a pole piece; the rolling assembly is used for rolling the pole piece with the pole lug stretched, and the rolling assembly is positioned at the downstream of the rolling assembly; and the heating component is arranged at the upstream of the rolling component and/or between the rolling component and the rolling component, and at least part of the pole piece is heated by the heating component. According to the rolling device provided by the utility model, the pole piece is stretched once by the rolling assembly before entering the rolling assembly, so that the stress concentration point of the pole piece is reduced, the phenomenon of belt breakage of the pole piece in the rolling process is avoided, and the yield of the pole piece is influenced; through setting up heating element, can fully preheat the pole piece, get rid of the moisture in the pole piece fast, reduce the internal stress of pole piece, make the internal active material of pole piece receive the suppression power even, guarantee that the pole piece atress is even and thickness is unanimous in the roll-in process, improve the production yield of pole piece.

Description

Rolling device

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to a rolling device.

Background

Pole piece rolling is an important link in the production process of lithium ion batteries, and the aim is to obtain pole pieces meeting the design requirements. The rolling is a necessary procedure, and after the pole piece is coated and dried, the pole piece is rolled in order to improve the loading amount of active substances in unit volume of the powder layer, ensure the consistency of the thickness of the pole piece and enhance the bonding strength of the active substances and the foil, so as to prevent the pole piece from peeling off in the processes of electrolyte soaking and battery use.

In the prior art, along with the increase of pole piece density, need roll-in device to provide higher roll-in pressure, under roll-in pressure effect, the active material of dressing region on the pole piece can produce extrusion and embedding effect to the foil for dressing region foil produces vertical extension, and the tab region has thickness difference with dressing region, does not bear the roll-in pressure effect in the roll-in process, then the tab region can't produce vertical extension. The longitudinal length difference of different areas is caused by the longitudinal different extension conditions of the dressing area and the tab area of the foil, and finally, the position of the tab area close to the dressing area is easy to shrink and fold, and even belt breakage is caused.

Disclosure of Invention

The utility model aims to provide a rolling device which solves the technical problem that a pole piece is easy to break in the rolling process in the prior art.

In order to achieve the purpose of the utility model, the utility model provides the following technical scheme:

the utility model provides a rolling device, which is used for manufacturing pole pieces and comprises:

the calendaring assembly is used for stretching the lugs of the pole pieces;

the rolling assembly is used for rolling the pole piece stretched by the pole lug, and the rolling assembly is positioned at the downstream of the rolling assembly;

the heating component is arranged at the upstream of the calendaring component and/or between the calendaring component and the rolling component, and at least part of the pole piece is heated by the heating component;

the rolling assembly comprises a first rolling assembly and a second rolling assembly, wherein the first rolling assembly and the second rolling assembly are respectively arranged at two ends of the pole piece in the width direction, so that the lugs at two ends of the pole piece are synchronously stretched.

The rolling assembly for stretching the pole piece is arranged at the upstream of the rolling assembly, and the pole piece is stretched for one time by the rolling assembly before entering the rolling assembly, so that stress concentration points of the pole piece are reduced, the phenomenon that the pole piece breaks the belt in the rolling process is avoided, and the yield of the pole piece is influenced; through setting up heating element, can fully preheat the pole piece, get rid of the moisture in the pole piece fast, reduce the internal stress of pole piece, make the internal active material of pole piece receive the suppression power even, guarantee that the pole piece atress is even and thickness is unanimous in the roll-in process, improve the production yield of pole piece.

In one embodiment, the heating assembly comprises a first heating assembly disposed upstream of the calendaring assembly.

In one embodiment, the heating assembly comprises a second heating assembly disposed between the calendaring assembly and the rolling assembly.

In one embodiment, the first heating assembly and/or the second heating assembly comprises an infrared heating device.

Through setting up first heating element and/or second heating element and including infrared heating device, utilize in the clearance of infrared ray penetration atom, molecule, make the vibration of atom, the molecule in the pole piece accelerate, the interval is enlarged, take place resonance promptly, inside active material of pole piece, solvent motion are accelerated and mutual friction increase heating motion, the heat can penetrate inside the pole piece, avoid the pole piece surface overheated in the twinkling of an eye, can avoid the pole piece surface destruction when fully heating the pole piece.

In one embodiment, the first heating component and the second heating component each comprise at least two heating pieces which are respectively arranged on two opposite sides of the pole piece along the thickness direction of the pole piece.

Through setting up at least two heating pieces that follow pole piece thickness direction interval distribution, can carry out even heating to two surfaces that are on the back of the body in the pole piece thickness direction, guarantee that the pole piece is evenly heated, improve first heating element and second heating element's heating efficiency and heating effect.

In one embodiment, the rolling assembly comprises a pair of rollers, the rolling device further comprises an upper rolling back roller and a lower rolling back roller, and the upper rolling back roller and the lower rolling back roller are respectively arranged on two opposite sides of the rolling assembly in the thickness direction of the pole piece so as to resist deflection deformation of the rolling assembly in the thickness direction of the pole piece.

In one embodiment, the first calendaring assembly and the second calendaring assembly share at least one of the upper calendaring back rollers, and the first calendaring assembly and the second calendaring assembly share at least one of the lower calendaring back rollers.

In one embodiment, the diameter of the upper calendaring back roll is greater than the diameter of the counter roll of the calendaring assembly with which the upper calendaring back roll is mated, and the diameter of the lower calendaring back roll is greater than the diameter of the counter roll of the calendaring assembly with which the lower calendaring back roll is mated.

In one embodiment, the rolling device further comprises an incubator having an inner cavity, and the rolling assembly, the first heating assembly and the second heating assembly are all located in the inner cavity of the incubator.

Through setting up the insulation can, separate inner chamber and external environment, reduce the heat exchange between inner chamber and the external environment, reduce the heat loss in the inner chamber, make the roll-in process of pole piece keep in certain temperature range, improve first heating element and second heating element to the heating effect of pole piece.

In one embodiment, the incubator is provided with an inlet and an outlet, and the rolling device further comprises a transmission assembly, wherein the transmission assembly is used for sequentially conveying the pole pieces from the inlet to the first heating assembly, the rolling assembly, the second heating assembly, the rolling assembly and the outlet. Through setting up transmission component, be favorable to guaranteeing that the processing of pole piece goes on in order.

In one embodiment, the rolling device further comprises a concentration adjustment assembly for controlling the concentration of the solvent in the inner cavity to be within a preset concentration range.

Through setting up concentration adjustment subassembly, can monitor and adjust the solvent concentration in the inner chamber, prevent that solvent concentration in the inner chamber from being too high, be favorable to reducing pollution, improve the security performance of roll-in device.

In one embodiment, the concentration adjustment assembly comprises a ventilation device, a concentration detection device and a control device in communication;

the ventilation device is used for ventilating the inner cavity;

the concentration detection device is used for detecting the concentration of the solvent in the inner cavity and sending concentration information to the control device;

the control device is used for receiving the concentration information, sending adjusting information to the air interchanger according to the concentration information and the preset concentration range, and the adjusting information is used for adjusting the running state of the air interchanger.

If the concentration detection device detects that the concentration of the solvent in the inner cavity is greater than the preset concentration range, the control device sends adjusting information to the air exchange device, so that the air exchange device adjusts the air return circulation in the inner cavity, the air in the inner cavity is discharged to the external environment, and the air in the external environment is pumped into the inner cavity, so that the concentration of the solvent in the inner cavity is reduced, the concentration of the solvent is controlled in the preset concentration range, pollution is reduced, and the safety performance of the rolling device is improved.

According to the rolling device provided by the utility model, the rolling assembly for stretching the pole piece is arranged at the upstream of the rolling assembly, and the pole piece is stretched once by the rolling assembly before entering the rolling assembly, so that the stress concentration point of the pole piece is reduced, the phenomenon of breakage of the pole piece in the rolling process is avoided, and the yield of the pole piece is influenced; through setting up heating element, can fully preheat the pole piece, get rid of the moisture in the pole piece fast, reduce the internal stress of pole piece, make the internal active material of pole piece receive the suppression power even, guarantee that the pole piece atress is even and thickness is unanimous in the roll-in process, improve the production yield of pole piece.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view showing the structure of a rolling apparatus according to an embodiment;

fig. 2 is a schematic diagram showing a matching manner of the upper rolling back roller, the lower rolling back roller and the rolling assembly in the rolling device according to an embodiment.

Reference numerals illustrate:

1-calendaring assembly; 11-a first calendaring assembly; 111-a first pair of rollers; 12-a second calendaring assembly; 121-a second pair of rollers; 2-rolling the assembly; 3-a first heating assembly; 31-heating element; 4-a second heating assembly; 5-an incubator; 51-inlet; 52-outlet; 53-lumen; 6-a transmission assembly; 71-a ventilator; 8-pole pieces; 81-electrode lugs; 82-dressing region; 91-upper calendaring back-roller; 92-lower calender backing roll.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

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 utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the description of the embodiments of the present utility model, it should be noted that the positional or positional relationship of the terms such as "center", "upper", "lower", "inner", "outer", etc. are based on the positional or positional relationship described in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

As shown in fig. 1, the rolling device provided by the utility model comprises a rolling assembly 1, a rolling assembly 2 and a heating assembly. The rolling device provided by the utility model is suitable for any material needing to be rolled, and the following embodiment takes a piece to be rolled as a pole piece 8 of a battery as an example.

The calendaring assembly 1 is used for stretching the lug 81 of the pole piece 8, so that the pole piece 8 is primarily stretched. The rolling assembly 2 is located at the downstream of the rolling assembly 1, and the rolling assembly 2 is used for rolling the pole piece 8 after the pole lug 81 is stretched. It will be appreciated that the "downstream" is the relatively later sequence of the rolling process of the pole piece 8, and the "upstream" is the relatively earlier sequence of the rolling process of the pole piece 8.

In the case where pole piece 8 is a pole piece, pole piece 8 includes dressing region 82 and tab 81. The type of the pole piece 8 is not limited, and may be, for example, a monopolar pole piece having one end of the tab 81 in the width direction of the dressing region 82, or a bipolar pole piece having two ends of the tab 81 in the width direction of the dressing region 82. In the prior art, the contact pressure between the foil material of the dressing area 82 and the foil material of the tab 81 and the roller is different, resulting in inconsistent tension distribution, and a diagonal line or even dead wrinkles are easily generated at the junction of the dressing area 82 and the tab 81, so that the pole piece 8 cannot be uniformly stretched, and even a belt breakage phenomenon may occur. In the embodiment, by arranging the calendaring assembly 1, the pole piece 8 is stretched for one time before entering the rolling assembly 2, so that the expansion difference of the pole lug 81 and the dressing area 82 can be improved, the subsequent rolling assembly 2 is facilitated to uniformly roll the pole piece 8, and the thickness consistency of the pole piece 8 is improved; meanwhile, the pole lug 81 is stretched into the corrugated undulating surface by the calendaring assembly 1, so that the occurrence rate of wrinkling caused by inconsistent extension of the pole lug 81 and the dressing area 82 in the rolling process can be reduced.

The heating component is arranged at the upstream of the rolling component 1 and/or between the rolling component 1 and the rolling component 2, and at least part of the pole piece is heated by the heating component. The heating assembly may apply one or more heating principles of electromagnetic heating, radiant heating, dielectric heating, etc. to heat the pole piece 8.

Under the condition that the heating assembly is arranged at the upstream of the rolling assembly 1, the pole piece 8 is preheated before the pole piece 8 enters the rolling assembly 1, redundant moisture in the dressing area 82 of the pole piece 8 is removed, the solvent residue rate is ensured to be in an action range, the pole piece 8 is fully filled with solvent, the pressing force (comprising vertical pressure and transverse shearing force) applied to the pole piece 8 when the pole piece 8 is rolled by the rolling assembly 2 is ensured to be uniform, and the thickness consistency of the pole piece 8 after rolling is improved.

Under the condition that heating element sets up between calendering subassembly 1 and roll-in subassembly 2, after the preliminary tensile of pole piece 8 through calendering subassembly 1, heating element heats pole piece 8, make dressing district 82 dry, guarantee that solvent residual rate is in the scope of action, and pole piece 8 receives the compacting force (including vertical pressure and transverse shear) when being rolled in by roll-in subassembly 2 even, because pole piece 8 is in semi-dry state, the motion between the active particles is more smooth and easy, be difficult for producing the damage, make the surface version of pole piece 8 after the suppression more level and smooth, not only guarantee that the thickness of pole piece 8 is even, can also reduce the broken area rate of pole piece 8.

According to the rolling device provided by the utility model, the rolling assembly 1 for stretching the pole piece 8 is arranged at the upstream of the rolling assembly 2, and the pole piece 8 is stretched once by the rolling assembly 1 before the pole piece 8 enters the rolling assembly 2, so that the stress concentration point of the pole piece 8 is reduced, the phenomenon that the pole piece 8 breaks the belt in the rolling process is avoided, and the yield of the pole piece 8 is influenced; through setting up heating element, can fully preheat pole piece 8, get rid of the moisture in the pole piece 8 fast, reduce the internal stress of pole piece 8, make the internal active material of pole piece 8 receive the suppression power even, guarantee that pole piece 8 atress is even and thickness is unanimous in the roll-in process, improve the production yield of pole piece 8.

In a specific embodiment, the heating assembly comprises a first heating assembly 3, the first heating assembly 3 being arranged upstream of the calendering assembly 1. In this embodiment, the pole piece 8 is heated by the first heating component 3 and then stretched by the calendaring component 1, which is beneficial to improving the stretching effect of the pole piece 8.

Further, the heating assembly comprises a second heating assembly 4, the second heating assembly 4 being arranged between the calender assembly 1 and the calender assembly 2. In this embodiment, the pole piece 8 is first heated by the first heating assembly 3, then stretched by the rolling assembly 1, then heated by the second heating assembly 4, and finally rolled by the rolling assembly 2.

In this embodiment, just preheat pole piece 8 through first heating element 3 before pole piece 8 gets into calendering subassembly 1, after pole piece 8 is through the tensile back of calendering subassembly 1, heat pole piece 8 again through second heating element 4, make pole piece 8 through twice preheating before getting into the roll-in subassembly 2, abundant moisture in the pole piece 8 is fully got rid of, guarantee that the solvent residual rate is in the scope of action, thereby make the solvent fully fill pole piece 8, guarantee that the pressing force (including vertical pressure and transverse shear) that pole piece 8 received when being rolled by roll-in subassembly 2 is even, improve the thickness uniformity of pole piece 8 after the roll-in.

In a specific embodiment, the first heating assembly 3 and/or the second heating assembly 4 comprise infrared heating means. For example, the first heating assembly 3 and the second heating assembly 4 each include infrared heating devices.

Through setting up first heating element 3 and/or second heating element 4 and including infrared heating device, utilize in the clearance of infrared ray penetration atom, molecule, make the vibration of atom, the molecule in pole piece 8 accelerate, the interval is enlarged, take place resonance promptly, inside active material of pole piece 8, solvent motion are accelerated and mutual friction increase heating motion, the heat can penetrate inside pole piece 8, avoid pole piece 8 surface overheated in the twinkling of an eye, can avoid pole piece 8 surface destruction when fully heating to pole piece 8.

In a specific embodiment, the first heating element 3 and the second heating element 4 each comprise at least two heating elements 31 respectively arranged on opposite sides of the pole piece 8 in the thickness direction of the pole piece 8.

Through setting up at least two heating pieces 31 that follow pole piece 8 thickness direction interval distribution, can carry out even heating to the two surfaces that are on the back of each other in the pole piece 8 thickness direction, guarantee that pole piece 8 is evenly heated, improve the heating efficiency and the heating effect of first heating element 3 and second heating element 4. Alternatively, the number of the heating elements 31 is even, and each two heating elements 31 distributed along the thickness direction of the pole piece 8 are grouped, and each group of heating elements 31 may be vertically and oppositely distributed along the thickness direction of the pole piece 8, or may be alternatively distributed.

Alternatively, the heating member 31 is an infrared heating device, which can not only sufficiently heat the surface of the pole piece 8, but also penetrate heat into the interior of the pole piece 8.

Optionally, the number and the setting positions of the rolling assemblies 1 correspond to the types of the pole pieces 8, and when the pole pieces to be rolled are monopole ear pole pieces, the number of the rolling assemblies 1 is one; when the pole piece to be rolled is a bipolar pole piece, the number of the rolling assemblies 1 is two. For convenience of description, the embodiment of the present utility model is described with the number of the rolling assemblies 1 being two, and is not represented by the case where the embodiment of the present utility model is limited to the number of the rolling assemblies 1 being two.

Referring to fig. 2, in a specific embodiment, the rolling assembly 1 includes a first rolling assembly 11 and a second rolling assembly 12, and the first rolling assembly 11 and the second rolling assembly 12 are respectively disposed at two ends of the pole piece 8 in the width direction, so as to synchronously stretch the tabs 81 at two ends of the pole piece 8. The width direction of the pole piece 8 is perpendicular to the movement direction of the pole piece 8 in the calendaring assembly 1.

Specifically, as shown in fig. 2, the first rolling assembly 11 includes two first pairs of rollers 111 disposed on opposite sides of the pole piece 8 in the thickness direction of the pole piece 8, and the second rolling assembly 12 includes two second pairs of rollers 121 disposed on opposite sides of the pole piece 8 in the thickness direction of the pole piece 8. The first calendaring assembly 11 and the second calendaring assembly 12 respectively stretch the tab 81 at the end of the pole piece 8 to fully ensure the stretching amount of the tab 81.

The rolling device further comprises an upper rolling back roller 91 and a lower rolling back roller 92, and the upper rolling back roller 91 and the lower rolling back roller 92 are respectively arranged on two opposite sides of the rolling assembly 1 in the thickness direction of the pole piece 8 in order to resist deflection deformation of the rolling assembly 1 in the thickness direction of the pole piece 8.

Specifically, the first rolling assembly 11 and the second rolling assembly 12 are sandwiched between the upper rolling back roller 91 and the lower rolling back roller 92, and the tab 81 of the pole piece 8 is extruded and stretched by the first rolling assembly 11 and the second rolling assembly 12. The upper and lower back rolls 91 and 92 serve as speed reference rolls, are opposite in rotation direction to the first and/or second pairs of rolls 111 and 121 in contact, and are identical in absolute value to the linear speeds of the first and/or second pairs of rolls 111 and 121 in contact. The upper calendaring back roller 91 and the lower calendaring back roller 92 can prevent the first pair of rollers 111 and the second pair of rollers 121 from slipping in the rolling process, effectively control the rotation speed of the first pair of rollers 111 and the second pair of rollers 121, meanwhile, the upper calendaring back roller 91 and the lower calendaring back roller 92 can also limit radial runout of the first pair of rollers 111 and the second pair of rollers 121 in the thickness direction of the pole piece 8, resist deflection deformation of the calendaring assembly 1 in the thickness direction of the pole piece 8, improve stability of the calendaring assembly 1, and facilitate uniform rolling of the pole piece 8.

The first calendering assembly 11 and the second calendering assembly 12 share at least one upper calendering backing roller 91 and the first calendering assembly 11 and the second calendering assembly 12 share at least one lower calendering backing roller 92 to improve the consistency of the first calendering assembly 11 and the second calendering assembly 12. Illustratively, the first and second calendaring assemblies 11 and 12 share an upper calendaring back roller 91, and the first and second calendaring assemblies 11 and 12 share a lower calendaring back roller 92, i.e., one of the first and second pairs of rollers 111 and 121 are each in abutment with the same upper calendaring back roller 91, and the other of the first and second pairs of rollers 111 and 121 are each in abutment with the same lower calendaring back roller 92.

Further, the diameters of the upper calendaring back roller 91 and the lower calendaring back roller 92 are larger than the diameters of the counter rollers of the calendaring assembly matched with the upper calendaring back roller and the lower calendaring back roller, so that slipping and even deviation between the back rollers and the corresponding counter rollers can be prevented, and the limiting effect of the back rollers on the calendaring assembly 1 can be enhanced. Specifically, the diameter of the upper back-rolling roller 91 is larger than the diameter of the first pair of rollers 111 and/or the second pair of rollers 121 that are in abutting engagement with the upper back-rolling roller 91, and the diameter of the lower back-rolling roller 92 is larger than the diameter of the first pair of rollers 111 and/or the second pair of rollers 121 that are in abutting engagement with the upper back-rolling roller 91.

In one embodiment, the rolling apparatus further comprises an incubator 5, the incubator 5 having an interior cavity 53, and the rolling assembly 1, the rolling assembly 2, and the heating assembly are all located in the interior cavity 53 of the incubator 5.

Specifically, the incubator 5 is a box-shaped structure, and the calendaring assembly 1, the rolling assembly 2 and the heating assembly are accommodated in the inner cavity 53 of the incubator 5, and the rolling process of the pole piece 8 is performed in the incubator 5. Through setting up insulation can 5, separate inner chamber 53 and external environment, reduce the heat exchange between inner chamber 53 and the external environment, reduce the heat loss in the inner chamber 53, make the roll-in process of pole piece 8 keep in certain temperature range, improve the heating element to the heating effect of pole piece 8.

Optionally, the insulation box 5 may be provided with an insulation layer, so as to further enhance the insulation effect.

The incubator 5 is provided with an inlet 51 and an outlet 52, and the rolling device further comprises a conveying assembly 6, wherein the conveying assembly 6 is used for conveying the pole piece 8 from the inlet 51 to the first heating assembly 3, the rolling assembly 1, the second heating assembly 4, the rolling assembly 2 and the outlet 52 in sequence. The transport assembly 6 may be a conveyor belt, a conveyor roller, or the like.

The transmission assembly 6 is connected with the upstream and the downstream of the rolling device, so that the orderly processing of the pole pieces 8 is ensured. Under the drive of the transmission assembly 6, the pole piece 8 enters the inner cavity 53 of the insulation box 5 from the inlet 51, is heated by the first heating assembly 3, is conveyed to the calendaring assembly 1 by the transmission assembly 6 to be stretched, then moves to the second heating assembly 4 to be heated for the second time, moves to the rolling assembly 2 to be rolled after being heated, and finally is conveyed to the downstream process by the transmission assembly 6 from the outlet 52.

In one embodiment, the roll-in device further comprises a concentration adjustment assembly for controlling the concentration of the solvent in the inner cavity 53 within a preset concentration range. Under the condition that the pole piece 8 is the pole piece, the pole piece 8 contains at least one solvent, and the environment in the insulation can 5 is comparatively closed relatively, through setting up concentration adjustment subassembly, can monitor and adjust the solvent concentration in the inner chamber 53, prevent that solvent concentration in the inner chamber 53 from being too high, be favorable to reducing pollution, improve the security performance of roll-in device.

It is understood that the preset concentration range is a preset solvent concentration range, and when the solvent concentration in the inner cavity 53 is within the preset concentration range, the environment in the inner cavity 53 is safer and more suitable.

Further, the concentration adjustment assembly includes a ventilation device 71, a concentration detection device, and a control device in communication. The ventilation device 71 is used to ventilate the lumen 53. The concentration detection means is for detecting the concentration of the solvent in the lumen 53 and sending concentration information to the control means. The control device is configured to receive the concentration information and send adjustment information to the ventilator 71 according to the concentration information and a preset concentration range, the adjustment information being configured to adjust an operation state of the ventilator 71. The operating state of the ventilator 71 may include start-stop, operating power, operating mode, etc.

Specifically, the ventilation device 71 may be a return air circulator, a ventilation fan, an air cleaner, or the like. If the concentration detection device detects that the concentration of the solvent in the inner cavity 53 is greater than the preset concentration range, the control device sends adjustment information to the ventilation device 71, so that the ventilation device 71 adjusts the return air circulation in the inner cavity 53, the air in the inner cavity 53 is discharged to the external environment, and the air in the external environment is pumped into the inner cavity 53, thereby reducing the concentration of the solvent in the inner cavity 53, controlling the concentration of the solvent in the preset concentration range, and being beneficial to reducing pollution and improving the safety performance of the rolling device.

In the description of the present specification, a description referring to the terms "embodiment," "specific embodiment," "example," or "specific example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The above disclosure is only a preferred embodiment of the present utility model, and it should be understood that the scope of the utility model is not limited thereto, but all or part of the procedures for implementing the above embodiments can be modified by one skilled in the art according to the scope of the appended claims.

Claims

1. A roll-in device for pole piece manufacture, characterized in that the roll-in device comprises:

the calendaring assembly is used for stretching the lugs of the pole pieces;

2. The roll pressing apparatus of claim 1, wherein the heating assembly comprises a first heating assembly disposed upstream of the calendaring assembly.

3. The roll pressing device of claim 2, wherein the heating assembly comprises a second heating assembly disposed between the calendaring assembly and the roll pressing assembly.

4. A rolling device according to claim 3, characterized in that the first heating element and/or the second heating element comprises an infrared heating device.

5. A roll pressing apparatus according to claim 3, wherein the first heating assembly and the second heating assembly each include at least two heating members disposed on opposite sides of the pole piece in a thickness direction of the pole piece.

6. The rolling device according to claim 1, wherein the rolling assembly comprises a pair of rolls, the rolling device further comprising an upper rolling back roll and a lower rolling back roll, the upper rolling back roll and the lower rolling back roll being provided on opposite sides of the rolling assembly in the thickness direction of the pole piece, respectively, in the thickness direction of the pole piece, so as to resist deflection deformation of the rolling assembly in the thickness direction of the pole piece.

7. The roll pressing apparatus of claim 6, wherein the first and second pressing assemblies share at least one of the upper pressing back rolls, and the first and second pressing assemblies share at least one of the lower pressing back rolls.

8. The roll pressing apparatus of claim 7, wherein the upper calender backing roll has a diameter greater than a diameter of a counter roll of the calender assembly with which the upper calender backing roll is mated, and the lower calender backing roll has a diameter greater than a diameter of a counter roll of the calender assembly with which the lower calender backing roll is mated.

9. The roll-in apparatus of claim 3, further comprising an incubator having an interior cavity, wherein the calendaring assembly, the roll-in assembly, and the heating assembly are all located in the interior cavity of the incubator.

10. The roll-in device of claim 9, wherein the incubator is provided with an inlet and an outlet, and further comprising a transport assembly for sequentially transporting the pole pieces from the inlet to the first heating assembly, the calendaring assembly, the second heating assembly, the roll-in assembly, and the outlet.

11. The roll press of claim 9, further comprising a concentration adjustment assembly for controlling the concentration of solvent in the interior cavity to be within a predetermined concentration range.

12. The roll-in device of claim 11, wherein the concentration-adjustment assembly comprises a ventilation device, a concentration-detection device, and a control device in communication;

the ventilation device is used for ventilating the inner cavity;