Rolling device

Abstract

The utility model discloses a rolling device which comprises an installation frame, an upper roller and a lower roller, a crack for a pole piece to pass through is arranged between the upper roller and the lower roller, two ends of the upper roller are respectively connected with a first bearing seat, the two first bearing seats are installed on the installation frame in a sliding mode, two ends of the lower roller are respectively connected with a second bearing seat, and the second bearing seats are installed on the installation frame in a sliding mode. The two second bearing seats are installed on an installation frame, the upper roller and the lower roller are in transmission through a gear transmission mechanism, an ultrasonic transducer is arranged on the installation frame, the output end of the ultrasonic transducer is connected with the first bearing seat, and the ultrasonic transducer is used for driving the first bearing seat to vibrate up and down. According to the rolling device disclosed by the utility model, under the action of inertia force generated by high-frequency vibration of the upper roller, the pole piece is rolled and generates plastic deformation, particles in a coating displace, and pores are reduced, so that the surface density of the pole piece is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery pole piece processing, and particularly relates to a rolling device. Background Art

[0002] With the development of science and the progress of society, power batteries have become one of the essential products in our lives. Their thickness and surface density directly affect the energy density and charge-discharge performance of power batteries. During the production process of power battery pole pieces, to ensure that the power battery pole pieces have a certain thickness and surface density, it is necessary to roll the power battery pole pieces through a rolling device to achieve the use effect of the power battery.

[0003] When the existing rolling device rolls the pole piece, the pole piece is rolled through the extrusion force of the upper roller and the lower roller, and the surface density of the pole piece is relatively low, which cannot meet the requirements of higher pole piece processes. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a rolling device. Under the action of the inertial force generated by the high-frequency vibration of the upper roller, the pole piece is rolled, undergoes plastic deformation, the particles in the coating are displaced, and the pores are reduced, thereby increasing the surface density of the pole piece.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A rolling device includes a mounting frame, an upper roller, and a lower roller. There is a gap for the pole piece to pass between the upper roller and the lower roller. Both ends of the upper roller are connected with a first bearing seat, and the two first bearing seats are slidably mounted on the mounting frame. Both ends of the lower roller are connected with a second bearing seat, and the two second bearing seats are mounted on the mounting frame. An ultrasonic transducer is arranged on the mounting frame, and the output end of the ultrasonic transducer is connected with the first bearing seat. The ultrasonic transducer is used to drive the first bearing seat to vibrate up and down.

[0007] As a further improvement of the above technical solution, there are at least two ultrasonic transducers, and the output ends of the two ultrasonic transducers are respectively connected with the two first bearing seats.

[0008] As a further improvement of the above technical solution, the ultrasonic transducers are provided with two groups. The two groups of ultrasonic transducers are respectively connected with the two first bearing seats. Each group of ultrasonic transducers includes at least two ultrasonic transducers, and the two ultrasonic transducers are symmetrically connected to both sides of the top of the first bearing seat with respect to the axis of the upper roller.

[0009] As a further improvement of the above technical solution, the mounting bracket includes a bottom plate, a wall plate and a top plate. There are multiple wall plates which are connected between the bottom plate and the top plate. The first bearing seat and the second bearing seat are mounted on the wall plate, and the ultrasonic transducer is mounted on the top plate.

[0010] As a further improvement of the above technical solution, the first bearing seat is slidably connected with the wall plate in an opening formed between two wall plates, and the second bearing seat is fixedly connected in the opening.

[0011] As a further improvement of the above technical solution, a guide plate is fixedly connected to the wall plate. One side of the guide plate extends into the opening, and the first bearing seat is slidably connected with the guide plate.

[0012] As a further improvement of the above technical solution, a cushion block is arranged between the second bearing seat and the bottom plate, and the cushion block is fixedly connected with the second bearing seat.

[0013] As a further improvement of the above technical solution, the upper roller and the lower roller are driven by a gear transmission mechanism.

[0014] As a further improvement of the above technical solution, the gear transmission mechanism includes a first gear fixedly connected to one end of the upper roller and a second gear fixedly connected to one end of the lower roller, and the first gear meshes with the second gear.

[0015] The beneficial effects of the present utility model are as follows: When rolling the battery pole piece, the electric energy of the ultrasonic transducer is converted into mechanical energy. The output end of the ultrasonic transducer drives the first bearing seat to vibrate at a high frequency, and then drives the upper roller to vibrate at a high frequency. Under the action of the inertial force generated by the high-frequency vibration of the upper roller, the pole piece is rolled, plastic deformation occurs, the particles in the coating are displaced, and the pores are reduced, thereby increasing the surface density of the pole piece. Description of the Drawings

[0016] The following further illustrates the present utility model in conjunction with the drawings and embodiments.

[0017] Figure 1 is the front view of a rolling device according to an embodiment of the present utility model;

[0018] Figure 2 is the axonometric view of a rolling device according to an embodiment of the present utility model;

[0019] Figure 3 is the structural exploded view of a rolling device according to an embodiment of the present utility model.

[0020] Reference numerals: 1, mounting bracket; 11, bottom plate; 12, wall plate; 13, top plate; 2, lower roller; 3, upper roller; 4, ultrasonic transducer; 5, gear transmission mechanism; 51, first gear; 52, second gear; 6, second bearing block; 7, first bearing block; 8, guide plate; 9, spacer block; 10, bolt. Detailed implementation manners

[0021] The following will clearly and completely describe the concept, specific structure and technical effects generated by the present utility model in combination with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present utility model. In addition, all connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the more optimal connection structure that can be formed by adding or reducing connection accessories according to specific implementation situations. For example, fixed connection / installation can be connected by accessories such as screws and bolts, or can be directly connected by welding, bonding and other methods. Each technical feature in the present utility model can be combined interactively without conflicting with each other.

[0022] Referring to Figures 1 - 3 , an embodiment of the present utility model discloses a rolling device, which includes a mounting bracket 1, an upper roller 3 and a lower roller 2. The upper roller 3 is located directly above the lower roller 2, and there is a slit for the electrode sheet to pass between the upper roller 3 and the lower roller 2. Both ends of the upper roller 3 are connected with a first bearing block 7, and the two first bearing blocks 7 are slidably installed on the mounting bracket 1, so that the upper roller 3 can move in the vertical direction, so as to approach or move away from the lower roller 2. Both ends of the lower roller 2 are connected with a second bearing block 6, and the two second bearing blocks 6 are fixedly installed on the mounting bracket 1. An ultrasonic transducer 4 is arranged on the mounting bracket 1, and the output end of the ultrasonic transducer 4 is connected with the first bearing block 7. The ultrasonic transducer 4 is used to drive the first bearing block 7 to vibrate up and down, and then drive the upper roller 3 to vibrate at a high frequency. Under the action of the inertial force generated by the high-frequency vibration of the upper roller 3, the electrode sheet is rolled, plastic deformation occurs, the particles in the coating move, and the pores decrease, thereby increasing the surface density of the electrode sheet.

[0023] In some embodiments, there are at least two ultrasonic transducers 4. Taking two ultrasonic transducers 4 as an example, the output ends of the two ultrasonic transducers 4 are respectively connected with the two first bearing blocks 7, so as to drive the two ends of the upper roller 3 to vibrate synchronously and at the same frequency, so that the force on the electrode sheet during rolling is uniform, and the rolling effect of the electrode sheet is improved.

[0024] In a more preferred embodiment, the ultrasonic transducer 4 has two groups, and the two groups of ultrasonic transducers 4 are respectively connected to the two first bearing seats 7, thereby driving the two ends of the upper roller 3 to vibrate synchronously at the same frequency; in addition, each group of ultrasonic transducers 4 includes at least two ultrasonic transducers 4. Taking two ultrasonic transducers 4 as an example, the two ultrasonic transducers 4 are symmetrically connected to the top two sides of the first bearing seat 7 with the axis of the upper roller 3, so that the force on the first bearing seat 7 and the upper roller 3 is stable, thereby making the high-frequency vibration of the upper roller 3 more stable, thereby improving the quality of the pole piece rolling.

[0025] In this embodiment, the mounting frame 1 includes a base plate 11, a wall panel 12 and a top plate 13, wherein the wall panel 12 has multiple pieces and is connected between the base plate 11 and the top plate 13. Specifically, the wall panels 12 have four pieces, wherein two wall panels 12 are arranged on one side of the base plate 11, an opening is formed between the two wall panels 12, one end of the first bearing seat 7 is slidably connected to the opening, and one end of the second bearing seat 6 is fixedly connected to the opening; the other two wall panels 12 are arranged on the other side of the base plate 11, an opening is also formed between the two wall panels 12, the other end of the first bearing seat 7 is slidably connected to the opening, and the other end of the second bearing seat 6 is fixedly connected to the opening; in this way, the first bearing seat 7 and the second bearing seat 6 are installed on the mounting frame 1, the ultrasonic transducer 4 is installed on the top plate 13, and the output pipe of the ultrasonic transducer 4 passes through the mounting hole provided on the top plate 13 and is connected to the first bearing seat 7 through bolts 10.

[0026] In the above embodiment, a guide plate 8 is fixedly connected to each of the wall panels 12 by screws. The guide plate 8 is located on the side of the wall panel 12 away from the upper roller 3. One side of the guide plate 8 extends into the opening, and the first bearing seat 7 is slidably connected to the guide plate 8. In this way, the outer wall of the first bearing seat 7 is limited and guided to ensure that the first bearing seat 7 slides stably in the vertical direction to improve the stability of its up and down vibration.

[0027] A cushion block 9 is arranged between the second bearing seat 6 and the bottom plate 11, and the cushion block 9 is fixedly connected to the second bearing seat 6. The impact force of the second bearing seat 6 and the lower roller 2 when the upper roller 3 vibrates is transmitted to the bottom plate 11 through the cushion block 9, thereby preventing the second bearing seat 6 and the lower roller 2 from being damaged and improving their service life.

[0028] In some embodiments, the upper roller 3 and the lower roller 2 are driven by a gear transmission mechanism 5. When the external motor drives the lower roller 2 to rotate, the gear transmission structure drives the upper roller 3 to rotate synchronously, so as to realize the tape walking of the pole piece during the banding. In other embodiments, the upper roller 3 and the lower roller 2 can be driven by a belt transmission mechanism, a chain transmission mechanism or other transmission mechanisms.

[0029] Furthermore, the gear transmission mechanism 5 includes a first gear 51 fixedly connected to one end of the upper roller 3 and a second gear 52 fixedly connected to one end of the lower roller 2. The first gear 51 meshes with the second gear 52. When the external motor drives the lower roller 2 to rotate, the first gear 51 is driven to rotate by the rotation of the second gear 52, so as to drive the upper roller 3 and the lower roller 2 to rotate synchronously, realizing the tape running during pole piece rolling. In this embodiment, the tooth height of the teeth of the first gear 51 and the second gear 52 is much larger than the amplitude of the up-and-down vibration of the upper roller 3, which can realize the function of meshing rotation under continuous collision. Moreover, both the first gear 51 and the second gear 52 are made of high-strength metal, and are not easily damaged when not colliding, having a long service life.

[0030] The above is a specific description of the preferred embodiment of the present invention, but the present invention is not limited to the described embodiment. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A rolling device, comprising a mounting frame, an upper roller and a lower roller, wherein a gap is provided between the upper roller and the lower roller for the pole piece to pass through, characterized in that: Both ends of the upper roller are connected to a first bearing seat, and the two first bearing seats are slidably installed on the mounting frame. Both ends of the lower roller are connected to a second bearing seat, and the two second bearing seats are installed on the mounting frame. An ultrasonic transducer is arranged on the mounting frame, and the output end of the ultrasonic transducer is connected to the first bearing seat. The ultrasonic transducer is used to drive the first bearing seat to vibrate up and down.

2. A rolling device according to claim 1, characterized in that: The ultrasonic transducers have at least two, and the output ends of the two ultrasonic transducers are respectively connected to the two first bearing seats.

3. A rolling device according to claim 1, characterized in that: There are two groups of ultrasonic transducers, which are respectively connected to the two first bearing seats. Each group of ultrasonic transducers includes at least two ultrasonic transducers, and the two ultrasonic transducers are symmetrically connected to the top two sides of the first bearing seats with the axis of the upper roller.

4. A rolling device according to claim 1, characterized in that: The mounting frame includes a bottom plate, a wall plate and a top plate. The wall plate has multiple pieces and is connected between the bottom plate and the top plate. The first bearing seat and the second bearing seat are installed on the wall plate, and the ultrasonic transducer is installed on the top plate.

5. A rolling device according to claim 4, characterized in that: The first bearing seat and the wall panel are slidably connected in an opening formed between two wall panels, and the second bearing seat is fixedly connected in the opening.

6. A rolling device according to claim 5, characterized in that: A guide plate is fixedly connected to the wall plate, one side of the guide plate extends into the opening, and the first bearing seat is slidably connected to the guide plate.

7. A rolling device according to claim 5, characterized in that: A cushion block is arranged between the second bearing seat and the bottom plate, and the cushion block is fixedly connected to the second bearing seat.

8. A rolling device according to claim 1, characterized in that: The upper roller and the lower roller are driven by a gear transmission mechanism.

9. A rolling device according to claim 8, characterized in that: The gear transmission mechanism comprises a first gear fixedly connected to one end of the upper roller and a second gear fixedly connected to one end of the lower roller, and the first gear is meshed with the second gear.

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