CN220995200U - Pole piece film forming device and pole piece processing system - Google Patents

Abstract

The utility model provides a pole piece film forming device and a pole piece processing system, wherein the pole piece film forming device comprises a center roller, an input roller, a plurality of thinning rollers and an output roller, wherein the input roller, the thinning rollers and the output roller rotate along the circumferential direction of the center roller in sequence; the central roller and the input roller roll the materials into pole piece films, and the pole piece films are attached to the central roller and conveyed backwards; the pole piece films on the center roller are sequentially rolled by a plurality of thinning rollers, so that the pole piece films are thinned; the output roller can roll a pole piece film with a target thickness on the center roller, and the pole piece film is attached to the output roller and is conveyed backwards along with the rotation of the output roller; the roll gap between at least one of the input roll, the thinning roll and the output roll and the center roll is adjustable. The pole piece film forming device disclosed by the utility model is not only beneficial to continuously conveying the pole piece film and not easy to break, so that the processing efficiency of the pole piece film is improved, but also has better universality by changing the roll gap between the central roll and at least one of the input roll, the thinning roll and the output roll.

Description

Pole piece film forming device and pole piece processing system

Technical Field

The utility model relates to the technical field of power batteries, in particular to a pole piece film forming device. The utility model also relates to a pole piece processing system provided with the pole piece film forming device.

Background

The pole piece processing process can be classified into a wet process and a dry process according to whether a solvent is used. The traditional wet process, the most common slurry coating process at present, is to uniformly mix electrode active materials, conductive agents and binders to prepare a liquid battery slurry mixture.

In order to ensure fluidity of the battery paste, the solvent content of the battery paste is generally 40% or more. The process of preparing the pole piece by the traditional coating process is also a process of heating and drying a large amount of solvent, which consumes huge electric power and energy, and meanwhile, the pole piece production process needs to wait for solvent evaporation, so that the production efficiency of the coating process is low.

The dry process theory does not need to add any solvent, the electrode sheet film can be prepared only by the fibrosis of the dry binder under the condition of no solvent, and the electrode sheet film and the current collector are subjected to hot-pressing compounding to obtain the dry electrode sheet. The pole piece film preparation process by the dry method does not need complex coating equipment, and the pole piece film can be prepared only by continuous heating and rolling. However, some dry process film-making processes are complex, have low efficiency, have high requirements on binder fibrosis, and require films with certain strength to meet processing requirements.

The conventional dry-process molding structure generally adopts linear rollers, the pressure between every two adjacent rollers is the same, and when the roller gap and the pressure between a pair of rollers are regulated, the roller gap and the pressure between other peripheral rollers also change, so that the dry-process molding structure can only prepare electrode films with one specification, and further the universality of the prepared structure is poor.

Disclosure of utility model

In view of the above, the utility model aims to provide a pole piece film forming device which is convenient for processing and forming a pole piece film and has better universality.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

The pole piece film forming device comprises a center roller, an input roller, a plurality of thinning rollers and an output roller, wherein the center roller is rotatably arranged;

The central roller and the input roller are used for rolling the materials blanked between the central roller and the input roller into pole piece films, and the pole piece films can be attached to the central roller and are conveyed backwards along with the rotation of the central roller;

The thinning rollers are sequentially arranged at intervals along the conveying direction of the pole piece film and can sequentially roll the pole piece film on the central roller, so that the pole piece film is thinned to the target thickness;

The output roller can roll the pole piece film with the target thickness on the center roller, and the pole piece film is attached to the output roller and is conveyed backwards along with the rotation of the output roller;

The roll gap between at least one of the input roll, the thinning roll and the output roll and the center roll is adjustable.

Further, the roll gaps among the input roll, the thinning roll and the output roll and the center roll are adjustable.

Further, the surface roughness of the input roller is smaller than that of the center roller;

and/or the surface roughness of the central roller is smaller than the surface roughness of the output roller.

Further, the rotational speed of the input roller is less than the rotational speed of the center roller;

and/or the rotation speed of the output roller is greater than that of the central roller.

Further, along the conveying direction of the pole piece film, roller gaps between the thinning rollers and the center roller are gradually reduced.

Further, the diameters of the input roller, the thinning roller and the output roller are smaller than the diameter of the center roller; and/or the number of the groups of groups,

And heating parts are arranged in the input roller and the central roller.

Compared with the prior art, the utility model has the following advantages:

According to the pole piece film forming device, the material is rolled into the pole piece film through the input roller and the central roller, the pole piece film is rolled and thinned to the target thickness through the plurality of thinning rollers sequentially after being attached to the central roller, and the pole piece film can be attached to the output roller and conveyed along with the rotation of the output roller after being rolled through the output roller, so that the pole piece film can be conveyed continuously and is not easy to break, the processing efficiency of the pole piece film is improved, and the thickness specification of the pole piece film can be adjusted by changing the roll gap between at least one of the input roller, the thinning rollers and the output roller and the central roller, so that the pole piece film forming device has good universality.

In addition, the roll gaps among the input roll, the thinning roll and the output roll and the central roll are adjustable, so that the thickness specification of the pole piece film can be changed to the greatest extent, and further, the pole piece film has good adjustment flexibility. The surface roughness of the input roller is smaller than that of the central roller, so that the pole piece film is favorably attached to the central roller, the surface roughness of the central roller is smaller than that of the output roller, and the pole piece film is favorably attached to the output roller and conveyed backwards. The rotating speed of the input roller is smaller than that of the central roller, and the rotating speed of the output roller is larger than that of the central roller, so that the pole piece film is favorably stuck on the central roller for backward conveying and stuck on the output roller for backward conveying.

In addition, along the direction of transport of pole piece membrane, a plurality of attenuate rollers with roll gap between the center roller sets up gradually, does benefit to the thickness attenuate to the target thickness of pole piece membrane, and can propose the shaping effect of pole piece membrane. The diameter of the central roller is larger than that of the input roller, the thinning roller and the output roller, so that the input roller, the thinning roller and the output roller can roll the pole piece film on the central roller; the heating parts are arranged in the input roller and the central roller, so that the forming effect of the pole piece film is improved, and the pole piece film is not easy to break, so that the pole piece film can be continuously conveyed.

In addition, another object of the utility model is to provide a pole piece processing system, comprising a conveying device for conveying a current collector, wherein at least one side of the current collector conveying path is provided with the pole piece film forming device, and the current collector and the pole piece film can be rolled together.

Further, the two sides of the current collector are respectively provided with the pole piece film forming device, and the two output rollers can roll the two pole piece films and the current collector positioned between the two pole piece films together.

Further, along the conveying direction of the current collector, the pole piece film forming devices are arranged on two sides of the current collector at intervals;

corresponding to each output roller, a compression roller is rotatably arranged on the other side of the current collector.

Further, the conveying device comprises an unreeling roller for unreeling the current collector and a reeling roller for reeling the current collector and the pole piece film pressed together by the reeling roller.

Compared with the prior art, the utility model has the following advantages:

According to the pole piece processing system, the current collector is conveyed through the conveying device, and the pole piece film forming device is arranged on at least one side of the current collector, so that pole piece films and the current collector are combined together in a rolling mode, and the processing efficiency of the pole piece is improved.

In addition, pole piece film forming devices are arranged on two sides of the current collector, and the two pole piece films and the current collector are rolled and compounded together through two output rollers, so that the processing efficiency of the pole piece is further improved. Along the direction of delivery of electric current collector, pole piece membrane forming device interval locates the both sides of electric current collector to and the setting of compression roller, can be through being located output roller and the compression roller of upper reaches earlier with its pole piece membrane roll-in complex on the electric current collector, and through being located output roller and the compression roller of low reaches with another pole piece membrane roll-in complex at the opposite side of electric current collector, also can improve the machining efficiency of pole piece. The unreeling roller and the reeling roller in the conveying device are simple in structure and good in using effect.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic view of a pole piece film forming device according to an embodiment of the present utility model;

Fig. 2 is a schematic diagram of a first structure of a pole piece processing system according to a second embodiment of the present utility model;

FIG. 3 is a schematic diagram of a second configuration of a pole piece processing system according to a second embodiment of the present utility model;

Fig. 4 is a schematic diagram of a third structure of a pole piece processing system according to a second embodiment of the present utility model.

Reference numerals illustrate:

1. A material; 2. an input roller; 3. a center roller; 4. an output roller; 5. a first thinning roller; 6. a second thinning roller; 7. a third thinning roller; 8. a fourth thinning roller; 9. an unreeling roller; 10. a current collector; 11. a press roller; 12. a guide roller; 18. a wind-up roll; 100. and (5) a pole piece film.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an azimuth or a positional relationship such as "upper", "lower", "inner", "back", and the like are presented, they are based on the azimuth or the positional relationship shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The present embodiment relates to a pole piece film forming device including a center roller 3 rotatably provided, and an input roller 2, a plurality of thinning rollers, and an output roller 4 rotatably provided in order in the circumferential direction of the center roller 3, as shown in fig. 1.

The central roller 3 and the input roller 2 are used for rolling the material 1 blanked between the central roller 3 and the input roller into a pole piece film 100, and the pole piece film 100 can be attached to the central roller 3 and is conveyed backwards along with the rotation of the central roller 3. The plurality of thinning rollers are sequentially arranged at intervals along the conveying direction of the pole piece film 100, and can sequentially roll the pole piece film 100 on the center roller 3, so that the pole piece film 100 is thinned to a target thickness. The output roller 4 can roll the pole piece film 100 with the target thickness on the center roller 3, and the pole piece film 100 is attached to the output roller 4 and is conveyed backwards along with the rotation of the output roller 4.

In detail, as shown in fig. 1, the diameter of the input roller 2, the thinning roller, and the output roller 4 is smaller than that of the center roller 3. So that the thinning roller and the output roller 4 can roll the pole piece film 100 on the center roller 3, thereby facilitating the forming of the pole piece film 100. In order to achieve the continuous conveying effect of the pole piece film 100, the surface roughness of the input roller 2 is smaller than that of the central roller 3, so that the pole piece film 100 can be adhered to the central roller 3 after being rolled and formed by the input roller 2 and the central roller 3, and is conveyed backwards along with the rotation of the central roller 3, and the central roller 3 is matched with a plurality of thinning rollers to roll and thin the pole piece film 100.

To ensure the thinning effect of the thinning roller on the pole piece film 100, the roller gaps between the plurality of thinning rollers and the center roller 3 are set to be smaller in the conveying direction of the pole piece film 100. Each thinning roller is named sequentially along the conveying direction of the pole piece film 100: a first thinning roller 5, a second thinning roller 6, a third thinning roller 7 and a fourth thinning roller 8. Wherein the gap between the first thinning roller 5 and the central roller 3 is called a first gap, the gap between the second thinning roller 6 and the central roller 3 is called a second gap, the gap between the third thinning roller 7 and the central roller 3 is called a third gap, and the gap between the fourth thinning roller 8 and the central roller 3 is called a fourth gap. The first roll gap, the second roll gap, the third roll gap and the fourth roll gap are sequentially reduced. Thus, the pole piece film 100 is graded and thinned, and the integral forming effect of the pole piece film 100 is improved. In the specific implementation, the thinning roller adopts four rollers as shown in the figure, and can also be increased or decreased adaptively according to the use requirement.

In addition, the surface roughness of the center roller 3 is smaller than that of the output roller 4, so that the pole piece film 100 can be attached to the output roller 4 after being rolled by the output roller 4 and the center roller 3, and is conveyed backwards along with the rotation of the output roller 4. In the conveying path of the pole piece film 100, the pole piece film 100 is sequentially attached to the central roller 3 and the output roller 4 for continuous conveying, and a supporting structure for supporting the pole piece film 100, which is independently arranged in the prior art, can be omitted, so that the production cost is reduced.

In this embodiment, the surface roughness of the input roller 2, the center roller 3 and the output roller 4 may be 0.8 μm, 1.0 μm and 1.6 μm, respectively, and the roughness of the three may be determined according to the requirements of the application. In this embodiment, the surface roughness of each thinning roller is smaller than that of the central roller 3, which is beneficial to the attaching and conveying effects of the pole piece film 100 on the central roller 3.

In this embodiment, the rotation speed of the input roller 2 is smaller than that of the central roller 3, and the rotation speed of the output roller 4 is larger than that of the central roller 3, so that the pole piece film 100 is also beneficial to being pasted on the central roller 3 for backward conveying and on the output roller 4 for backward conveying.

In order to improve the flexibility of use of the pole piece film forming device, in this embodiment, a roll gap between at least one of the input roll 2, the thinning roll and the output roll 4 and the central roll 3 is adjustable. Preferably, the roll gaps between the input roll 2, the thinning roll and the output roll 4 and the center roll 3 are adjustable. Here, the thickness of the pole piece film 100 can be changed by adjusting the roll gap, so that the pole piece film 100 with different thicknesses can be processed, and the universality is better.

In addition, in this embodiment, the roll gaps among the input roll 2, the thinning roll, the output roll 4 and the central roll 3 can be independently adjusted, the roll gaps are not mutually affected, the problem that the roll gaps are adjusted by adopting the linear roll body to stretch and move the whole body in the prior art can not occur, and the adjustment convenience is better.

In the concrete implementation, the input roller 2, the thinning roller and the output roller 4 are all rotationally arranged on the mounting seat of the frame, the position of the mounting seat on the frame is adjustable, and the size of the roller gap among the input roller 2, the thinning roller and the output roller 4 and the center roller 3 can be changed by changing the position of the mounting seat on the frame. The mounting seat can be mounted on the frame in a detachable connection mode so as to adjust the position of the mounting seat.

As a preferred embodiment, the positions of the input roller 2, the thinning roller and the output roller 4 are adjusted in the same manner, and taking the input roller 2 as an example, the position of the mounting seat for mounting the input roller 2 on the extension line of the connecting line between the center roller 3 and the center of the input roller 2 is adjustable. The frame is provided with a plurality of mounting holes positioned at two sides of the extension line, when the roll gap between the input roll 2 and the center roll 3 is required to be changed, the position of the mounting seat is moved, and then the mounting seat is connected with the corresponding mounting holes again. Of course, other manners of adjusting the position of the mounting seat can be adopted, so long as the adjustment requirement is met.

In addition, in order to improve the forming effect of the pole piece film 100, heating parts are provided in the input roller 2 and the center roller 3 to heat the material 1 in the process of rolling the material 1 by the input roller 2 and the center roller 3, thereby improving the forming effect of the pole piece film 100.

As shown in fig. 1, in the pole piece film forming device in this embodiment, when in use, a material 1 falls between an input roller 2 and a center roller 3, an output roller 4 and the center roller 3 roll-heat the material 1 to form a pole piece film 100, the pole piece film 100 is attached to the center roller 3 and conveyed backward with the rotation of the center roller 3, a plurality of thinning rollers roll-press the pole piece film 100 on the center roller 3 respectively, so that the thickness of the pole piece film 100 reaches a target thickness, and finally the output roller 4 rolls the pole piece film 100 on the center roller 3, so that the pole piece film 100 is attached to the output roller 4 and conveyed backward with the rotation of the output roller 4.

The pole piece film forming device of the embodiment is characterized in that the material 1 is rolled into the pole piece film 100 through the input roller 2 and the central roller 3, the pole piece film 100 is rolled and thinned to the target thickness by a plurality of thinning rollers after being attached to the central roller 3, and then the pole piece film 100 can be attached to the output roller 4 and conveyed along with the rotation of the output roller 4 after being rolled by the output roller 4, so that the pole piece film 100 can be conveyed continuously and is not easy to break, the processing efficiency of the pole piece film 100 is improved, and the thickness specification of the pole piece film 100 can be adjusted by changing the roll gap between the central roller 3 and at least one of the input roller 2, the thinning rollers and the output roller 4, thereby having better universality.

In addition, the pole piece film forming device in the embodiment is beneficial to reducing the space occupation amount in the length direction and improving the space utilization rate in the height direction compared with the linear processing equipment in the prior art, is beneficial to saving the space and has a good continuous processing effect.

Example two

The present embodiment relates to a pole piece processing system, comprising a conveying device for conveying a current collector 10, wherein at least one side of a conveying path of the current collector 10 is provided with the pole piece film forming device as described above, and the current collector 10 and the pole piece film 100 can be rolled together.

According to the pole piece processing system, the current collector 10 is conveyed through the conveying device, and the pole piece film forming device is arranged on at least one side of the current collector 10, so that the pole piece film 100 and the current collector 10 are rolled and compounded together, and the processing efficiency of the pole piece is improved.

Structurally, the delivery device comprises an unreeling roller 9 for unreeling the current collector 10, and a reeling roller 18 for reeling the current collector 10 and the pole piece film 100 pressed together by the reeling roller 18. The conveying device is simple in structure, convenient to arrange and implement and good in use effect.

As a first structural example of the pole piece processing system, as shown in fig. 2, a pole piece film 100 processing system is provided on one side of the current collector 10, and the output roller 4 is located on one side of the current collector 10. A pressing roller 11 is provided on the other side of the current collector 10 with respect to the output roller 4, and the pole piece film 100 output from the output roller 4 is combined together under the roller pressures of the output roller 4 and the pressing roller 11. In order to enhance the composite effect between the pole piece film 100 and the current collector 10, heating portions are also provided in the output roller 4 and the press roller 11.

According to the scheme that the pole piece film 100 is arranged on one side of the current collector 10 to form the device, the pole piece processing system can be directly compounded on one side of the current collector 10 while processing the pole piece film 100, so that the processing efficiency of the pole piece is improved.

As a second structural example of the pole piece processing system, as shown in fig. 2, both sides of the current collector 10 are provided with pole piece film forming devices, and two output rollers 4 can roll the two pole piece films 100 and the current collector 10 located therebetween together. At this time, a heating portion is preferably disposed in the output roller 4 to enhance the composite effect between the pole piece film 100 and the current collector 10.

According to the scheme that the pole piece film forming devices are symmetrically arranged on the two sides of the current collector 10, continuous production of the pole piece film 100 and the pole piece can be achieved, and therefore the processing efficiency of the pole piece is improved.

As a third structural example of the pole piece processing system, as shown in fig. 4, pole piece film forming devices are provided at intervals on both sides of the current collector 10 in the conveying direction of the current collector 10, and a pressing roller 11 is rotatably provided on the other side of the current collector 10 corresponding to each output roller 4. That is, a pole piece film forming device is disposed at the upstream of one side of the current collector 10, and a pole piece film forming device is also disposed at the downstream of the other side of the current collector 10, so as to sequentially combine two pole piece films 100 on the current collector 10.

Wherein, the output roller 4 and the compression roller 11 positioned at the upstream roll-in compound the pole piece film 100 on one side of the current collector 10, and the output roller 4 and the compression roller 11 positioned at the downstream roll-in compound the pole piece film 100 and the current collector 10 with the pole piece film 100 compounded, thereby compounding the pole piece film 100 on the other side of the current collector 10.

Two guide rollers 12 are rotatably arranged below the upstream output roller 4 and above the lower output roller 4 at intervals, and the pole piece with the pole piece film 100 at one side passes between the downstream output roller 4 and the compression roller 11 through the guide of the guide rollers 12 and is rolled with the pole piece film 100 at the other side to be matched with each other. The guide roller 12 is simple in structure, convenient to implement and good in guide effect.

The pole piece film forming device is arranged at the upstream and downstream of the two sides of the current collector 10, so that continuous production of the pole piece film 100 and the pole piece can be realized, and the processing efficiency of the pole piece can be improved.

The pole piece processing system in the embodiment is simple in structure, convenient to arrange and implement, and capable of realizing continuous production of the pole piece in the processing process of the pole piece film 100, thereby being beneficial to improving the processing efficiency of the pole piece and having better practicability.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. The utility model provides a pole piece membrane forming device which characterized in that:

The device comprises a central roller, an input roller, a plurality of thinning rollers and an output roller, wherein the central roller is rotationally arranged, and the input roller, the plurality of thinning rollers and the output roller are sequentially rotationally arranged along the circumferential direction of the central roller;

The central roller and the input roller are used for rolling the materials blanked between the central roller and the input roller into pole piece films, and the pole piece films can be attached to the central roller and are conveyed backwards along with the rotation of the central roller;

The thinning rollers are sequentially arranged at intervals along the conveying direction of the pole piece film and can sequentially roll the pole piece film on the central roller, so that the pole piece film is thinned to the target thickness;

The output roller can roll the pole piece film with the target thickness on the center roller, and the pole piece film is attached to the output roller and is conveyed backwards along with the rotation of the output roller;

The roll gap between at least one of the input roll, the thinning roll and the output roll and the center roll is adjustable.

2. The pole piece film forming device according to claim 1, wherein:

The roll gaps among the input roll, the thinning roll and the output roll and the center roll are adjustable.

3. The pole piece film forming device according to claim 1, wherein:

The surface roughness of the input roller is smaller than that of the center roller;

and/or the surface roughness of the central roller is smaller than the surface roughness of the output roller.

4. The pole piece film forming device according to claim 1, wherein:

the rotating speed of the input roller is smaller than that of the center roller;

and/or the rotation speed of the output roller is greater than that of the central roller.

5. The pole piece film forming device according to claim 1, wherein:

And along the conveying direction of the pole piece film, the roller gaps between the thinning rollers and the center roller are gradually reduced.

6. The pole piece film forming device according to any one of claims 1 to 5, characterized in that:

The diameters of the input roller, the thinning roller and the output roller are smaller than the diameter of the center roller; and/or the number of the groups of groups,

And heating parts are arranged in the input roller and the central roller.

7. A pole piece processing system, characterized in that:

a transport device for transporting a current collector, at least one side of the current collector transport path being provided with a pole piece film forming device according to any one of claims 1 to 6, the current collector and the pole piece film being capable of being rolled together.

8. The pole piece processing system of claim 7, wherein:

The two sides of the current collector are respectively provided with the pole piece film forming device, and the two output rollers can roll the two pole piece films and the current collector positioned between the two pole piece films together.

9. The pole piece processing system of claim 7, wherein:

The pole piece film forming devices are arranged on two sides of the current collector at intervals along the conveying direction of the current collector;

corresponding to each output roller, a compression roller is rotatably arranged on the other side of the current collector.

10. The pole piece processing system of any of claims 7 to 9, wherein:

the conveying device comprises an unreeling roller for unreeling the current collector and a reeling roller for reeling the current collector and the pole piece film pressed together by the reeling roller.