Roller press and lithium battery pole piece production system

Abstract

The utility model belongs to the field of lithium batteries, and particularly relates to a roller press and a lithium battery pole piece production system, and the roller press comprises a roller press body and a rolling mechanism; the rolling mechanism comprises N fixed rollers and N-1 movable rollers, and N is larger than or equal to 2; the N fixed rollers are fixedly arranged on the roller press body side by side; a movable roller is arranged below every two adjacent fixed rollers, and an adjusting assembly is fixed to each movable roller. According to the technical scheme, a structural design framework of 2N-2 calendaring is realized by using 2N-1 rollers, namely, when a double-rolling structure is also realized, only three rollers are needed in the application, and four rollers are needed in the related technology to realize double rolling, so that the equipment cost of the roller press is reduced, and the requirement on the number of times of pole piece calendaring is met. Meanwhile, by arranging the adjusting assembly, the position of the movable roller is adjusted, so that the requirement for the mounting precision of the movable roller is lowered, and meanwhile, the pressure during rolling is conveniently adjusted.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery production, and in particular to a roller press and a lithium battery pole piece production system. Background Art

[0002] Rolling is a key process for controlling the thickness of lithium battery pole pieces during production.

[0003] Most roller presses used in the related art are single roller presses, which use two rollers, one roller for rolling and one roller for support. For pole pieces with severe rebound, a double roller press is used, that is, two single roller presses are used in sequence for rolling.

[0004] For a single-rolling machine, if the rebound is serious, it needs to be re-machined and calendered twice, which greatly reduces the production efficiency. For a double-rolling machine, since the roller is the core component of the roller press, four rollers are needed for two calenderings, and the equipment cost is relatively high.

[0005] How to reduce equipment costs while completing two calendering operations is currently an urgent issue to be solved. Utility Model Content

[0006] The utility model aims to provide a roller press and a lithium battery pole piece production system.

[0007] In order to solve the above technical problems, the utility model provides a roller press, comprising:

[0008] Roller press body and roller press mechanism;

[0009] The roller pressing mechanism is fixedly arranged on the roller pressing machine body;

[0010] The rolling mechanism includes N fixed rollers and N-1 movable rollers, wherein N is greater than or equal to 2;

[0011] N fixed rollers are fixedly arranged side by side on the roller press body;

[0012] A movable roller is arranged below two adjacent fixed rollers, and the movable rollers are respectively abutted against the corresponding fixed rollers;

[0013] The fixed roller is fixedly arranged on the roller press body;

[0014] An adjustment component is fixed on each of the movable rollers;

[0015] The adjusting assembly is suitable for adjusting the position of the movable roller, thereby adjusting the pressure of the two fixed rollers abutting against the movable roller.

[0016] Further, the adjustment assembly includes a first driving part, a second driving part and a third driving part;

[0017] The driving directions of the first driving part and the second driving part are parallel to the connecting line of the axes of the two fixed rollers abutted by the corresponding movable rollers;

[0018] The driving direction of the third driving part is parallel to the central axis of the line connecting the axes of the two fixed rollers abutted by the corresponding movable roller.

[0019] Furthermore, the first driving unit, the second driving unit and the third driving unit are all hydraulic cylinders.

[0020] Further, the adjustment assembly includes a first driving part and a second driving part;

[0021] A line connecting the intersection of the driving directions of the first driving unit and the second driving unit and the axis of the corresponding movable roller is parallel to a line connecting the axes of the two fixed rollers abutted by the movable roller.

[0022] Furthermore, the diameters of the N fixed rollers are all the same.

[0023] Furthermore, a first backing roller is provided between two adjacent fixed rollers;

[0024] The first backing roller is tangent to the corresponding movable roller.

[0025] Furthermore, tension isolation components are provided below the fixed rollers at both ends of the N fixed rollers.

[0026] Further, the tension-breaking assembly includes a second backing roller and a third backing roller;

[0027] The second back roller and the third back roller are arranged tangentially.

[0028] Furthermore, the N fixed rollers are arranged on the same horizontal line.

[0029] The embodiment of the utility model also provides a lithium battery pole piece production system, including: a pole piece conveying device and a roller press as described above;

[0030] The pole pieces output by the pole piece conveying device enter into the rolling mechanism of the rolling machine.

[0031] The beneficial effect of the utility model is that the utility model provides a roller press and a lithium battery pole piece production system, wherein the roller press includes: a roller press body and a roller pressing mechanism; the roller pressing mechanism is fixedly arranged on the roller press body; the roller pressing mechanism includes N fixed rollers and N-1 movable rollers, wherein N is greater than or equal to 2; the N fixed rollers are fixedly arranged side by side on the roller press body; a movable roller is arranged below two adjacent fixed rollers, and the movable rollers are respectively abutted against the corresponding fixed rollers, and an adjustment component is fixed on each movable roller; the adjustment component is suitable for adjusting the position of the movable roller, thereby adjusting the pressure of the two fixed rollers abutting against the movable rollers. A structural design framework for realizing 2N-2 calenderings using 2N-1 rollers, that is, when realizing the same double-rolling structure, the roller press of the present application only needs to use 3 rollers, while the related art needs to use 4 rollers to realize double-rolling, thereby reducing the equipment cost of the roller press and meeting the demand for the number of pole piece calenderings. At the same time, by setting the adjustment component, the position of the movable roller is adjusted, thereby reducing the requirements for the installation accuracy of the movable roller, and at the same time, it is convenient to adjust the pressure during rolling. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Figure 1 It is a structural schematic diagram of a roller press provided by an embodiment of the utility model.

[0034] Figure 2 It is a partial structural schematic diagram of the rolling mechanism provided in the embodiment of the utility model.

[0035] In the figure: 100, roller press body; 200, roller pressing mechanism; 210, fixed roller; 220, movable roller; 230, adjustment assembly; 240, first back roller; 250, tension isolation assembly; 251, second back roller; 252, third back roller. DETAILED DESCRIPTION

[0036] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0037] For examples, see Figure 1-Figure 2At least one embodiment provides a roller press, comprising: a roller press body 100 and a roller pressing mechanism 200; the roller pressing mechanism 200 is fixedly arranged on the roller press body 100; the roller pressing mechanism 200 comprises N fixed rollers 210 and N-1 movable rollers 220, wherein N is greater than or equal to 2; the N fixed rollers 210 are fixedly arranged side by side on the roller press body 100; a movable roller 220 is arranged below two adjacent fixed rollers 210, and the movable rollers 220 are respectively abutted against the corresponding fixed rollers 210. A structural design framework for realizing 2N-2 calenderings using 2N-1 rollers, that is, when realizing the same double-rolling structure, only three rollers are needed by using the roller press of the present application, while four rollers are needed to realize double-rolling in the related art, thereby reducing the equipment cost of the roller press and meeting the demand for the number of electrode calenderings. At the same time, by setting the adjustment component, the position of the movable roller is adjusted, thereby reducing the requirements for the installation accuracy of the movable roller, and at the same time, it is convenient to adjust the pressure during rolling.

[0038] It should be noted that the diameters of the N fixed rollers 210 are the same. In some embodiments, the diameters of the N-1 movable rollers 220 are also the same and are the same as the diameter of the fixed roller 210 .

[0039] In order to adjust the pressure between the fixed roller 210 and the movable roller 220, in some embodiments, the fixed roller 210 is fixedly arranged on the roller press body 100; the adjusting assembly 230 is suitable for adjusting the position of the movable roller 220, so as to adjust the pressure of the two fixed rollers 210 abutting against the movable roller 220. By setting the adjusting assembly 230 to adjust the position of the movable roller 220, the pressure between the two fixed rollers 210 tangent to the movable roller 220 is kept the same, and the pressure value meets the rolling requirements.

[0040] In at least one embodiment, the adjustment assembly 230 includes a first drive unit, a second drive unit and a third drive unit; the driving directions of the first drive unit and the second drive unit are parallel to the line connecting the axes of the two fixed rollers 210 abutted by the corresponding movable roller 220; the driving direction of the third drive unit is parallel to the central axis of the line connecting the axes of the two fixed rollers 210 abutted by the corresponding movable roller 220.

[0041] The driving direction of the first driving unit is F1, the driving direction of the second driving unit is F2, and the driving direction of the third driving unit is F3.

[0042] Wherein, the first driving part, the second driving part and the third driving part are all hydraulic cylinders.

[0043] The adjustment process of making the pressure of adjacent fixed rollers 210 and dynamic rollers 220 the same is as follows: take the structure of three-roller double-rolling as an example, control the first drive unit and the second drive unit to operate first, adjust the pressure between the dynamic pressure roller and the two fixed pressure rollers to the same, and then adjust the third drive unit to adjust the pressure value.

[0044] In other embodiments, the adjustment assembly 230 includes a first driving unit and a second driving unit; a line connecting the intersection of the driving direction of the first driving unit and the driving direction of the second driving unit and the axis of the corresponding movable roller 220 is parallel to a line connecting the axes of the two fixed rollers 210 against which the movable roller 220 is abutted.

[0045] In order to cut off the tension, in some embodiments, a first back roller 240 is disposed between two adjacent fixed rollers 210; the first back roller 240 is tangent to the corresponding movable roller 220. In some other embodiments, a first back roller 240 is also disposed between two adjacent movable rollers 220, and the first back roller 240 is tangent to the corresponding fixed roller 210.

[0046] Among them, tension isolation components 250 are provided below the fixed rollers 210 at both ends of the N fixed rollers 210.

[0047] Specifically, the tension isolation assembly 250 includes a second back roller 251 and a third back roller 252 ; the second back roller 251 and the third back roller 252 are tangentially arranged.

[0048] At least one embodiment further provides a lithium battery electrode production system, comprising: an electrode conveying device and a roller press as described above; the electrode output by the electrode conveying device enters the roller press mechanism 200 of the roller press. The electrode is fed into the roller press in a direction as follows: Figure 1 As shown in F4 in .

[0049] In summary, the utility model provides a roller press and a lithium battery pole piece production system, wherein the roller press comprises: a roller press body 100 and a roller pressing mechanism 200; the roller pressing mechanism 200 is fixedly arranged on the roller press body 100; the roller pressing mechanism 200 comprises N fixed rollers 210 and N-1 movable rollers 220, wherein N is greater than or equal to 2; the N fixed rollers 210 are fixedly arranged side by side on the roller press body 100; a movable roller 220 is arranged below two adjacent fixed rollers 210, and the movable rollers 220 are respectively abutted against the corresponding fixed rollers 210. A structural design framework of 2N-2 calendering is realized by using 2N-1 rollers, that is, when realizing the same double-rolling structure, only 3 rollers are needed by using the roller press of the present application, while 4 rollers are needed to realize double-rolling in the related art, thereby reducing the equipment cost of the roller press and meeting the demand for pole piece calendering times. At the same time, by setting the adjustment component, the position of the movable roller is adjusted, thereby reducing the requirements for the installation accuracy of the movable roller, and at the same time, it is convenient to adjust the pressure during rolling.

[0050] All devices (parts without specific structure) selected in this application are universal standard parts or parts known to those skilled in the art, and their structures and principles can be known by those skilled in the art through technical manuals or conventional experimental methods. In addition, the software programs involved in this application are all prior art, and this application does not involve any improvement to the software programs.

[0051] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0053] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0054] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0055] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0056] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A roller press, characterized in that: include: Roller press body and roller press mechanism; The roller pressing mechanism is fixedly arranged on the roller pressing machine body; The rolling mechanism includes N fixed rollers and N-1 movable rollers, wherein N is greater than or equal to 2; N fixed rollers are fixedly arranged side by side on the roller press body; A movable roller is arranged below two adjacent fixed rollers, and the movable rollers are respectively abutted against the corresponding fixed rollers; The fixed roller is fixedly arranged on the roller press body; An adjustment component is fixed on each of the movable rollers; The adjusting assembly is suitable for adjusting the position of the movable roller, thereby adjusting the pressure of the two fixed rollers abutting against the movable roller.

2. The roller press according to claim 1, characterized in that The adjustment assembly includes a first driving part, a second driving part and a third driving part; The driving directions of the first driving part and the second driving part are parallel to the connecting line of the axes of the two fixed rollers abutted by the corresponding movable rollers; The driving direction of the third driving part is parallel to the central axis of the line connecting the axes of the two fixed rollers abutted by the corresponding movable roller.

3. The roller press according to claim 2, characterized in that The first driving part, the second driving part and the third driving part are all hydraulic cylinders.

4. The roller press according to claim 2, characterized in that The adjustment assembly includes a first driving part and a second driving part; A line connecting the intersection of the driving directions of the first driving unit and the second driving unit and the axis of the corresponding movable roller is parallel to a line connecting the axes of the two fixed rollers abutted by the movable roller.

5. The roller press according to claim 1, characterized in that The diameters of the N fixed rollers are all the same.

6. The roller press according to claim 1, characterized in that A first backing roller is arranged between two adjacent fixed rollers; The first backing roller is tangent to the corresponding movable roller.

7. The roller press according to claim 6, characterized in that Tension isolation components are provided below the fixed rollers at both ends of the N fixed rollers.

8. The roller press according to claim 7, characterized in that The tension-breaking assembly includes a second backing roller and a third backing roller; The second back roller and the third back roller are arranged tangentially.

9. The roller press according to claim 1, characterized in that: The N fixed rollers are arranged on the same horizontal line.

10. A lithium battery pole piece production system, characterized in that: include: A pole piece conveying device and a roller press as claimed in any one of claims 1 to 9; The pole pieces output by the pole piece conveying device enter into the rolling mechanism of the rolling machine.

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