A ceramic pressure roller

Abstract

This utility model relates to the field of lithium battery manufacturing technology, specifically to a ceramic pressure roller, comprising: a roller made of ceramic material; two flanges, respectively connected to both ends of the roller by first screws; a plurality of protrusions evenly distributed around the axial direction on the side of the flange facing the roller, and a first groove corresponding to the protrusions at the end of the roller; a mandrel coaxially inserted inside the roller; a plurality of second grooves evenly distributed around the axial direction on the inner sidewall of the roller, the second grooves being arranged through the axial direction; a protrusion corresponding to each second groove on the outer periphery of the mandrel; and the end of the mandrel inserted inside the flange and connected to the flange by second screws. This invention solves the technical problems of existing pressure rollers where the roller material is steel, resulting in low elastic modulus, deformation during long-term use, and coating peeling leading to rust and affecting the quality of battery electrodes.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing technology, specifically to a ceramic pressure roller. Background Technology

[0002] Pressing into a film is a key process in the preparation of dry electrodes. The fibrous material is compacted into a continuous film by the first pressure roller, and then the film is pressed evenly onto the foil by the second pressure roller to form a dry positive electrode film, a dry negative electrode film, and a solid electrolyte film.

[0003] In related technologies, pressure rollers generally include a roller and a roller core. Both the roller and the roller core are made of steel. The roller has a low elastic modulus and deforms during long-term use. The coating on the roller peels off, leading to rust and affecting the quality of the battery electrode sheets. Utility Model Content

[0004] This utility model provides a ceramic pressure roller that solves the technical problems of existing pressure rollers, which are made of steel, have low elastic modulus, deform during long-term use, and have coating peeling leading to rust, thus affecting the quality of battery electrodes.

[0005] In view of this, the present invention provides a ceramic pressure roller, comprising:

[0006] The rollers are made of ceramic.

[0007] Two flanges are respectively connected to the two ends of the roller by a first screw; a plurality of protrusions are evenly provided around the axial direction of the flanges facing the roller, and the end of the roller is provided with a first groove that matches the protrusions;

[0008] A mandrel is coaxially inserted inside the roller; the inner sidewall of the roller is uniformly provided with a plurality of second grooves around its axial direction, and the second grooves are arranged to pass through the roller along its axial direction; a protrusion is adapted to each second groove on the outer periphery of the mandrel; the end of the mandrel is inserted into the flange and connected to the flange by a second screw.

[0009] Optionally, the flange and the protrusion are integrally formed.

[0010] Optionally, the cross-section of the protrusion is formed in a semi-circular shape.

[0011] Optionally, the mandrel is bonded to the roller.

[0012] Optionally, the flange is a steel flange.

[0013] Optionally, the mandrel is a steel mandrel.

[0014] Optionally, the end of the roller is provided with a first screw hole corresponding to the first screw, and a threaded sleeve is threaded into the first screw hole, the threaded sleeve being connected to the first screw.

[0015] Optionally, the threaded sleeve is bonded to the first screw hole.

[0016] The technical solution of this utility model has the following advantages:

[0017] 1. The roller of this utility model is made of ceramic material. Compared with the roller made of metal material, it can avoid the contamination of the lithium battery film by metal impurities on the metal roller surface, thereby improving the performance and safety of the lithium battery. The density of ceramic material is less than that of metal material and the elastic modulus is greater than that of metal material, which effectively improves the deformation resistance of the roller and reduces the overall weight. The torque and inertia required for driving are also effectively reduced, thus significantly improving the driving performance and control performance, which is conducive to the precise control of the whole machine.

[0018] 2. The flange of this utility model cooperates with the first groove of the roller through the protrusion, and the mandrel cooperates with the second groove through the protrusion, which improves the integrity of the connection of the three and forms a stable rigid body. The double nested structure improves the firmness of the connection and the structural strength, prevents the roller from sliding radially due to pressure and radial shear force during the rolling process, and improves the service life.

[0019] 3. This utility model uses a first screw and a second screw for connection, which facilitates the disassembly and maintenance of the roller, avoids the problems of high assembly difficulty and easy deformation of the mandrel caused by welding, and improves assembly accuracy. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of the ceramic pressure roller provided by this utility model from a first perspective;

[0022] Figure 2 A schematic diagram of the structure of the ceramic pressure roller provided by this utility model from a second perspective;

[0023] Figure 3 for Figure 2 Sectional view at point AA;

[0024] Figure 4 A schematic diagram of the mandrel provided by this utility model from a first perspective;

[0025] Figure 5 A partial structural schematic diagram of the mandrel provided by this utility model from a third perspective;

[0026] Figure 6 A schematic diagram of the mandrel provided by this utility model from a second perspective;

[0027] Figure 7 A schematic diagram of the roller provided by this utility model from a first perspective;

[0028] Figure 8 A schematic diagram of the roller provided by this utility model from a second perspective;

[0029] Figure 9 for Figure 8 Sectional view at point BB in the middle;

[0030] Figure 10 A structural schematic diagram of the flange provided by this utility model from a first-view perspective;

[0031] Figure 11 A structural schematic diagram of the flange provided by this utility model from a second perspective;

[0032] Figure 12 for Figure 11 Sectional view at point CC.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Roller; 2. Flange; 3. First screw; 4. Protrusion; 5. First groove; 6. Mandrel; 7. Second groove; 8. Protrusion; 9. Second screw. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0039] The following is combined Figures 1 to 12 The following describes embodiments of the present invention.

[0040] According to an embodiment of the present invention, a ceramic pressure roller is provided, comprising: a roller 1 made of ceramic material; two flanges 2, respectively connected to the two ends of the roller 1 by first screws 3; a plurality of protrusions 4 are uniformly provided around the side of the flanges 2 facing the roller 1 along its axial direction, and a first groove 5 adapted to the protrusions 4 is provided at the end of the roller 1; a mandrel 6 is coaxially inserted inside the roller 1; a plurality of second grooves 7 are uniformly provided around the inner sidewall of the roller 1 along its axial direction, and the second grooves 7 are arranged through the axial direction; a protrusion 8 is adapted to each second groove 7 on the outer periphery of the mandrel 6; and the end of the mandrel 6 is inserted inside the flange 2 and connected to the flange 2 by second screws 9.

[0041] It should be noted that roller 1, flange 2 and mandrel 6 are arranged coaxially.

[0042] In this embodiment, by using a ceramic roller 1, compared to a metal roller 1, the contamination of the lithium battery film by metal impurities on the metal roller surface can be avoided, thereby improving the performance and safety of the lithium battery. The ceramic material has a lower density and a higher elastic modulus than the metal material, thus effectively improving the deformation resistance of the roller 1 and reducing the overall weight. Consequently, the torque and inertia required for driving are effectively reduced, resulting in significantly improved driving and control performance, which is beneficial for precise control of the entire machine. Furthermore, the flange 2 is tightly fitted into the first groove 5 at the end of the roller 1 by the protrusion 4, enhancing the overall clamping force in the rotational direction. The roller 1 is fixedly connected by the first screw 3. The mandrel 6 passes through the roller 1 and engages with the second groove 7 through the protrusion 8. The end of the mandrel 6 is fixedly connected to the flange 2 by the second screw 9. This improves the overall integrity of the connection and forms a stable rigid body. The double nested structure improves the connection firmness and structural strength, prevents the roller 1 from radially slipping due to pressure and radial shear force during the rolling process, and improves its service life. The connection of the first screw 3 and the second screw 9 facilitates the disassembly and maintenance of the roller 1, avoids the problems of high assembly difficulty and easy deformation of the mandrel 6 caused by welding, and improves the assembly accuracy.

[0043] In one embodiment, such as Figures 10 to 12 As shown, flange 2 and protrusion 4 are integrally formed.

[0044] In this embodiment, the flange 2 and the protrusion 4 are integrally formed, which improves the structural strength and integrity, and has high reliability. During the rotation process, the torque can be transmitted through the protrusion 4, reducing the force borne by the first screw 3. The flange 2 is fixedly connected to the spindle 6, and the two flanges 2 are limited at both ends of the roller 1 to prevent the roller 1 from moving axially.

[0045] In one embodiment, such as Figures 4 to 6 As shown, the cross-section of the protrusion 8 is semi-circular.

[0046] In this embodiment, the cross-section of the protrusion 8 is semi-circular, and the cross-section of the second groove 7 is also adapted to be semi-circular, so that the two fit together tightly, making the roller 1 and the mandrel 6 firmly fixed, effectively preventing the roller 1 from sliding radially due to pressure and radial shear force during the rolling process, and the ceramic roller 1 and the mandrel 6 are combined into a rigid body.

[0047] Specifically, such as Figure 2 and Figure 6 As shown, there are four protrusions 8 and four corresponding second grooves 7.

[0048] In one embodiment, the mandrel 6 is bonded to the roller 1.

[0049] In this embodiment, the roller 1 needs to withstand a large pressure during use. After the mandrel 6 is glued to the roller 1, the mandrel 6 is tightly attached to the inner wall of the roller 1, which can provide a strong support and prevent the roller 1 from sliding radially during the rolling process, thereby improving the rolling effect and service life.

[0050] In one embodiment, flange 2 is a steel flange 2.

[0051] In this embodiment, flange 2 is a steel flange 2, which improves structural strength.

[0052] In one embodiment, the mandrel 6 is a steel mandrel 6.

[0053] In this embodiment, flange 2 is a steel mandrel 6, which improves the support strength.

[0054] In one embodiment, the end of the roller 1 is provided with a first screw hole corresponding to the first screw 3, and a threaded sleeve is connected to the first screw hole, and the threaded sleeve is connected to the first screw 3.

[0055] In this embodiment, by setting a threaded sleeve in the first screw hole of the roller 1, the bonding strength is high, and the direct contact between the first screw 3 and the first screw hole is avoided, which would cause the ceramic thread in the first screw hole to break.

[0056] Specifically, the threaded sleeve is made of PEEK material.

[0057] In one embodiment, the threaded sleeve is bonded to the first screw hole.

[0058] In this embodiment, the threaded sleeve is bonded to the first screw hole to further improve the connection strength, prevent the threaded sleeve from falling off, and improve the bonding strength.

[0059] Specifically, such as Figure 4 , Figure 5 , Figure 10 and Figure 12 As shown, the flange 2 is provided with a through hole for fitting onto the mandrel 6. The flange 2 is provided with a plurality of second screw holes evenly arranged around its axial direction for the second screw 9 to pass through. The second screw holes are arranged radially along the flange 2. The mandrel 6 is provided with a plurality of third screw holes corresponding to the second screw 9, which are connected to the third screw holes on the mandrel 6 through the second screw holes, facilitating installation and disassembly.

[0060] Specifically, such as Figure 3 , Figure 10 and Figure 11 As shown, the flange 2 is provided with multiple fourth screw holes along the axial direction for the first screw 3 to pass through, and the first screw 3 passes through the fourth screw holes and connects with the first screw holes.

[0061] The specific installation process of the ceramic pressure roller provided in this embodiment includes the following steps:

[0062] Step 1: Inject high-strength adhesive into the first screw hole of roller 1;

[0063] Step 2: Screw the high-strength PEEK threaded insert into the first screw hole, scrape off the excess adhesive, and let it stand for 2-3 hours to cure.

[0064] Step 3: Apply a layer of adhesive to the inside of the steel mandrel 6 and the roller 1 respectively, then insert the steel mandrel 6 into the roller 1, let it stand for 2-3 hours to cure, and then put the steel flange 2 into the mandrel 6.

[0065] Step 4: Assemble the steel flange 2 onto both ends of the roller 1 and tighten it using the first screw 3;

[0066] Step 5: Secure the steel flange 2 to the mandrel 6 by tightening it with the second screw 9, and then perform fine grinding on the outer cylindrical grinder to make the circular runout within 2μm. Leave a margin of 0.2-0.5mm on the outer diameter of the roller 1.

[0067] In practical applications, two assembled ceramic pressure rollers can be fixed to the rolling equipment. The positive or negative electrode sheet of the battery is conveyed through the gap between the two ceramic pressure rollers. By adjusting the gap between the two ceramic pressure rollers, the battery electrode sheet can be compacted.

[0068] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A ceramic press roller, characterized by include; The roller (1) is made of ceramic material; Two flanges (2) are connected to the two ends of the roller (1) by first screws (3); a plurality of protrusions (4) are evenly provided on the side of the flange (2) facing the roller (1) around its axial direction, and the end of the roller (1) is provided with a first groove (5) that matches the protrusions (4). A mandrel (6) is coaxially inserted into the roller (1); the inner sidewall of the roller (1) is uniformly provided with a plurality of second grooves (7) around its axial direction, and the second grooves (7) are provided through the axial direction; a protrusion (8) is provided on the outer periphery of the mandrel (6) corresponding to each second groove (7); the end of the mandrel (6) is inserted into the flange (2) and connected to the flange (2) by a second screw (9).

2. The ceramic press roll according to claim 1, characterized in that The flange (2) and the protrusion (4) are integrally formed.

3. The ceramic press roll of claim 1, wherein, The cross-section of the protrusion (8) is semi-circular.

4. The ceramic press roll of claim 1, wherein, The mandrel (6) is bonded to the roller (1).

5. The ceramic press roll of claim 1, wherein, The flange (2) is a steel flange (2).

6. The ceramic press roll of claim 1, wherein, The mandrel (6) is a steel mandrel (6).

7. The ceramic press roll according to any one of claims 1 to 6, characterized in that The end of the roller (1) is provided with a first screw hole corresponding to the first screw (3), and a threaded sleeve is threaded into the first screw hole, and the threaded sleeve is connected to the first screw (3).

8. The ceramic press roll according to claim 7, characterized in that The threaded sleeve is bonded to the first screw hole.

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