Dry-method membrane-making calendering continuous rolling system

Abstract

The utility model relates to a dry-method film-making calendaring continuous rolling system which comprises a continuous rolling roller unit, at least one positioning roller is installed at each of the two ends of the continuous rolling roller unit in a matched mode, and the positioning rollers prevent the continuous rolling roller unit from deviating. The continuous rolling roller unit comprises a feeding roller set and a covering roller set, and a plurality of continuous rolling working rollers arranged in an arrayed mode are connected between the covering roller set and the feeding roller set. The feeding end of the feeding roller set is connected with the discharging end of the feeding device, the feeding device feeds a material to the feeding roller set, the continuous rolling working roller continuously extrudes and thinns the material to form a membrane, and the covering roller set covers the membrane and a current collector. By arranging the continuous roller unit, film forming, thinning and covering of the film can be achieved, the manufacturing process can be effectively shortened, the film thickness precision can be improved, the production efficiency can be improved, the production time can be saved, and the production cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dry electrode manufacturing, in particular to a dry film making calendering and continuous rolling system. Background Art

[0002] The diaphragm is an important raw material for preparing lithium battery electrode sheets, which is prepared by a diaphragm preparation system. The diaphragm preparation system includes a calendering roller group and a thinning roller group arranged at intervals. The calendering roller group calenders the raw materials into a film, and the thinning roller group thins the diaphragm.

[0003] The calendering roller group and the thinning roller group in the prior art usually adopt the form of two symmetrically arranged working rollers, and the discharge end of the calendering roller group is discontinuous with the feed end of the thinning roller group. The process is long, the film forming accuracy is not high, and the film is easy to break during the transmission process, resulting in low production efficiency, long production time and high production cost. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned existing production technologies, the applicant provides a dry film-making calendering and rolling system. By setting up a continuous rolling roller unit, it is possible to achieve film forming, thinning and lamination of the membrane, which can effectively shorten the process, improve the thickness accuracy of the membrane, improve production efficiency, save production time and reduce production costs.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A dry film-making calendering system comprises a continuous rolling roller unit, at least one positioning roller is respectively installed at both ends of the continuous rolling roller unit, and the positioning roller prevents the continuous rolling roller unit from deflecting;

[0007] The continuous rolling roller unit comprises a feeding roller group and a laminating roller group, and a plurality of arranged continuous rolling working rollers are connected between the laminating roller group and the feeding roller group;

[0008] The feeding end of the feeding roller group is connected to the discharging end of the feeding device, the feeding device feeds the material to the feeding roller group, the continuous rolling working roller continuously squeezes and thins the material to form a membrane, and the laminating roller group laminates the membrane with the current collector.

[0009] As a further improvement of the above technical solution:

[0010] The current collector is unwound by an unwinding device, and a discharge end of the unwinding device is connected with a feed end of a winding device through the current collector.

[0011] A plurality of rollers, a plurality of tension rollers, a plurality of swing roller groups, and a plurality of partition roller groups are arranged between the unwinding device and the rewinding device.

[0012] The passing roller changes the conveying direction of the current collector, and the tension roller, the swing roller group and the partition roller group adjust the tension of the current collector.

[0013] The single swing roller group includes a fixed roller and a swing roller that swings relative to the fixed roller.

[0014] The unwinding device's discharge port, the continuous roller unit's feed port, and the winding device's feed port are all equipped with deviation correction sensors.

[0015] A thickness measuring device is installed between the continuous rolling roller unit and the winding device.

[0016] The feeding roller group, the laminating roller group and a plurality of continuous rolling working rollers are arranged along the normal direction of the end surface of the current collector and are located between the unwinding device and the winding device.

[0017] Multiple continuous rolling work rolls are driven independently.

[0018] The beneficial effects of the utility model are as follows:

[0019] The utility model has a compact and reasonable structure and is easy to operate. By arranging a continuous rolling roller unit, the dry film making calendering and continuous rolling system integrates film, thinning and laminating functions, and can achieve high-quality and high-efficiency preparation of lithium battery pole pieces.

[0020] The utility model also has the following advantages:

[0021] (1) In the present invention, by providing positioning rollers, the working rollers in the continuous rolling unit can be prevented from being offset, thereby effectively preventing the current collector and the membrane from deviating and improving the membrane making accuracy.

[0022] (2) In the present invention, by arranging a continuous rolling roller unit between the winding device and the unwinding device, the membrane can be directly laminated on the current collector, thus shortening the manufacturing process, greatly saving production time and improving production efficiency.

[0023] (3) In the present invention, by changing the number of feed roller groups, single-sided or double-sided coating of the current collector can be achieved, and the use flexibility is high.

[0024] (4) In the utility model, by providing a plurality of continuous rolling working rolls, the powder material fed by the feeding device can be rolled into a film and continuously thinned to ensure the thickness and surface density of the film, and the formed film is not easy to break.

[0025] (5) In the utility model, by setting a roller, a tension roller, a swing roller group, and a partition roller group, the tension, guidance, support and traction of the current collector and the electrode sheet can be controlled, and the tension accuracy of each tension zone can be effectively controlled to prevent the membrane from being damaged during the traction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The structure of the utility model is shown in FIG. Figure 1 .

[0027] Figure 2 The structure of the utility model is shown in FIG. Figure 2 .

[0028] Figure 3 The structure of the utility model is shown in FIG. Figure 3 .

[0029] Figure 4 The structure of the utility model is shown in FIG. Figure 4 .

[0030] Among them: 1. Positioning roller; 2. Continuous rolling roller unit; 3. Feeding device; 4. Unwinding device; 5. Winding device; 6. Overroller; 7. Tension roller; 8. Swing roller group; 9. Break roller group; 10. Correction sensor; 11. Thickness measuring device;

[0031] 201. Feeding roller group; 202. Continuous rolling working roller; 203. Laminating roller group. DETAILED DESCRIPTION

[0032] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0033] like Figure 1-Figure 4 As shown, a dry film-making calendering and rolling system includes a rolling roller unit 2, at both ends of which are respectively equipped with at least one positioning roller 1, and the positioning roller 1 prevents the rolling roller unit 2 from shifting; the rolling roller unit 2 includes a feeding roller group 201 and a laminating roller group 203, and a plurality of arranged rolling working rollers 202 are connected between the laminating roller group 203 and the feeding roller group 201; the feeding end of the feeding roller group 201 is connected to the discharging end of the feeding device 3, and the feeding device 3 feeds the material to the feeding roller group 201, and the rolling working roller 202 continuously squeezes and thins the material to form a film, and the laminating roller group 203 laminates the film with the current collector. The dry film-making calendering and rolling system of the utility model can squeeze and thin the material, so that the material forms a film, and can laminate the film-forming material with the current collector to complete the high-efficiency preparation of lithium battery pole pieces.

[0034] The positioning roller 1 can ensure that the continuous rolling working roller 202, the working rollers in the feeding roller group 201 and the laminating roller group 203 are not offset, and can ensure the overall rigidity of the dry film forming calendering continuous rolling system;

[0035] The continuous rolling unit 2 can roll the powder material fed by the feeding device 3 into a film, and continuously thin it to ensure the thickness and surface density of the film, and the film is not easy to break;

[0036] The continuous rolling unit 2 includes a feeding roll group 201, a continuous rolling working roll group 202 and a laminating roll group 203;

[0037] The feeding roller group 201 can be provided with one or two groups according to actual use requirements;

[0038] The laminating roller group 203 can realize single-sided laminating or double-sided laminating according to the arrangement number of the feeding roller group 201;

[0039] The structures of the feeding roller group 201 and the laminating roller group 203 are both in the form of two symmetrically arranged working rollers;

[0040] The multiple continuous rolling working rolls 202 are independently driven, and have good control flexibility.

[0041] The current collector is unwound through the unwinding device 4, and the discharge end of the unwinding device 4 is connected with the feed end of the winding device 5 through the current collector;

[0042] A plurality of rollers 6, a plurality of tension rollers 7, a plurality of swing roller groups 8, and a plurality of partition roller groups 9 are arranged between the unwinding device 4 and the rewinding device 5;

[0043] A plurality of rollers 6, a plurality of tension rollers 7, a plurality of swing roller groups 8, and a plurality of partition roller groups 9 are arranged between the unwinding device 4 and the rewinding device 5; the partition roller group 9 can separate the tension of the front and rear ends;

[0044] The single swing roller set 8 includes a fixed roller and a swing roller swinging relative to the fixed roller.

[0045] The passing roller 6 changes the transmission direction of the current collector, and the tension roller 7, the swing roller group 8 and the partition roller group 9 adjust the tension of the current collector; by setting the passing roller 6, the tension roller 7, the swing roller group 8 and the partition roller group 9, the tension, guidance, support and traction of the current collector and the electrode sheet can be controlled, and the tension accuracy of each tension zone can be effectively controlled to prevent the membrane from being damaged during the traction process.

[0046] The unwinding device 4, the continuous roller unit 2 and the winding device 5 are equipped with a deviation correction sensor 10. The deviation correction sensor 10 is used to control the transmission direction of the current collector and the electrode to ensure that they do not deviate during operation.

[0047] A thickness measuring device 11 is installed between the continuous rolling roller unit 2 and the winding device 5. The thickness measuring device 11 can be a thickness gauge, which is used to detect the thickness of the electrode sheet formed after the current collector and the membrane are laminated.

[0048] The feed roller group 201, the laminating roller group 203 and several continuous rolling work rollers 202 are arranged along the normal direction of the end surface of the current collector and are located between the unwinding device 4 and the winding device 5. This arrangement enables the current collector and the membrane to be rolled up after lamination, so there is no need to roll up and unwind the membrane separately, which can shorten the production time and improve the calendering film forming efficiency.

[0049] The following is the specific examples section.

[0050] In one embodiment of the present invention, Figure 2-Figure 3 As shown, the dry film-making calendering and rolling system of this embodiment includes a group of feeding rollers 201, a plurality of continuous rolling working rollers 202, a group of laminating rollers 203, a feeding device 3, a reeling device 4, a reeling device 5, a plurality of rollers 6, a plurality of tension rollers 7, two groups of swing rollers 8, two groups of partition rollers 9, three deviation correction sensors 10, and a thickness measuring device 11; wherein,

[0051] Figure 2-Figure 3 In the figure, the arrow indicates the direction of material transmission, the winding device 5 is located directly below the unwinding device 4 in the vertical direction, and the current collector is transmitted from the unwinding device 4 to the winding device 5;

[0052] A plurality of rollers 6, a plurality of tension rollers 7, and two groups of swing rollers 8 are arranged between the winding device 5 and the unwinding device 4, so that the current collector is roughly in the shape of "⊐", with a current collector transmission section arranged in the vertical direction, which is convenient for the subsequent arrangement of the continuous rolling roller unit 2 in the horizontal direction;

[0053] The current collector is unwound by the unwinding device 4 and passes through the laminating roller group 203;

[0054] The membrane is fed by the feeding device 3, thinned by the continuous roller unit 2, and then wound up together with the current collector by the winding device 5.

[0055] like Figure 2 As shown, two positioning rollers 1 may be provided, respectively located at the two ends of the continuous rolling roller unit 2;

[0056] like Figure 3 As shown, four positioning rollers 1 may also be provided, two in a group, and arranged at both ends of the continuous rolling roller group unit 2 respectively;

[0057] In addition, two sets of swing rollers 8 are arranged between the winding device 4 and the continuous rolling roller unit 2, and between the unwinding device 5 and the continuous rolling roller unit 2;

[0058] A group of partition roller groups 9 are arranged between the winding device 4 and the continuous rolling roller unit 2 and between the unwinding device 5 and the continuous rolling roller unit 2. The two groups of partition roller groups 9 are respectively located between the corresponding swing roller groups 8 and the passing rollers 6.

[0059] The working process of this embodiment is as follows:

[0060] Add the mixed film-making material to the feeding device 3, and feed it to the feeding end of the feeding roller group 201 through the feeding device 3;

[0061] The two working rollers in the feeding roller group 201 rotate in opposite directions to squeeze the film-making material into a film to form a film sheet;

[0062] The continuous rolling work roll 202 performs fine rolling and thinning on the film to achieve a suitable thickness and surface density of the film;

[0063] In the continuous rolling unit 2, the rotation directions of the two adjacent working rolls are opposite;

[0064] Subsequently, the thinned film is transferred to the laminating roller group 203, and the two working rollers in the laminating roller group 203 rotate in opposite directions to laminate the film and the current collector, thereby obtaining a single-sided laminated electrode.

[0065] The pole piece is rolled up by the rolling device 5 , and the thickness is measured by the thickness measuring device 11 before rolling up.

[0066] In another embodiment of the present invention, Figure 4 As shown, two groups of feeding roller groups 201, one group of laminating roller group 203 and a plurality of continuous rolling working rollers 202 may be arranged, the two groups of feeding roller groups 201 are arranged symmetrically and spaced apart, the laminating roller group 203 is located between the two feeding roller groups 201, and the laminating roller group 203 and the feeding roller groups 201 on both sides are connected by a plurality of continuous rolling working rollers 202 respectively;

[0067] Correspondingly, there are two feeding devices 3 arranged;

[0068] This embodiment can laminate the membrane on both end surfaces of the current collector, thereby preparing a double-sided laminated electrode.

[0069] The working process of this embodiment is as follows:

[0070] The mixed film-making materials are added to two feeding devices 3 respectively, and are fed to corresponding feeding roller groups 201 through the feeding devices 3;

[0071] Two groups of feeding rollers 201 extrude the film-making materials respectively, and the corresponding continuous rolling working rollers 202 perform fine rolling and thinning on the film sheets;

[0072] Subsequently, the two membranes are transported to the laminating roller group 203 to be laminated with the current collector, thereby obtaining a double-sided laminated electrode.

[0073] The pole piece is rolled up by the rolling device 5 , and the thickness is measured by the thickness measuring device 11 before rolling up.

[0074] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A dry film-making calendering and rolling system, characterized in that: It comprises a continuous rolling roller unit (2), at both ends of which are respectively equipped with at least one positioning roller (1), and the positioning roller (1) prevents the continuous rolling roller unit (2) from deflecting; The continuous rolling roller unit (2) comprises a feeding roller group (201) and a laminating roller group (203), and a plurality of arranged continuous rolling working rollers (202) are connected between the laminating roller group (203) and the feeding roller group (201); The feeding end of the feeding roller group (201) is connected to the discharging end of the feeding device (3), the feeding device (3) feeds material to the feeding roller group (201), the continuous rolling working roller (202) continuously extrude and thin the material to form a membrane, and the laminating roller group (203) laminates the membrane with the current collector.

2. A dry film-making calendering and rolling system according to claim 1, characterized in that: The current collector is unwound through an unwinding device (4), and the discharge end of the unwinding device (4) is connected to the feed end of the winding device (5) through the current collector.

3. A dry film-making calendering and rolling system as claimed in claim 2, characterized in that: A plurality of rollers (6), a plurality of tension rollers (7), a plurality of swing roller groups (8), and a plurality of partition roller groups (9) are arranged between the unwinding device (4) and the rewinding device (5).

4. A dry film-making calendering and rolling system as claimed in claim 3, characterized in that: The transfer roller (6) changes the transmission direction of the current collector, and the tension roller (7), the swing roller group (8) and the partition roller group (9) adjust the tension of the current collector.

5. A dry film-making calendering and rolling system as claimed in claim 3, characterized in that: The single swing roller group (8) comprises a fixed roller and a swing roller swinging relative to the fixed roller.

6. A dry film-making calendering and rolling system as claimed in claim 2, characterized in that: The discharge point of the unwinding device (4), the feed point of the continuous rolling roller unit (2), and the feed point of the winding device (5) are all equipped with deviation correction sensors (10).

7. A dry film-making calendering and rolling system as claimed in claim 2, characterized in that: A thickness measuring device (11) is installed between the continuous rolling roller unit (2) and the winding device (5).

8. A dry film-making calendering and rolling system as claimed in claim 2, characterized in that: The feeding roller group (201), the laminating roller group (203) and the plurality of continuous rolling working rollers (202) are arranged along the normal direction of the end surface of the current collector and are located between the unwinding device (4) and the winding device (5).

9. A dry film-making calendering and rolling system as claimed in claim 1, characterized in that: A plurality of continuous rolling working rolls (202) are independently driven.

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