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CN-121973494-A - Roller body fixing structure and system for pole piece rolling working section of lithium battery

CN121973494ACN 121973494 ACN121973494 ACN 121973494ACN-121973494-A

Abstract

The application discloses a roller body fixing structure and a roller body fixing system for a rolling section of a lithium battery pole piece, and relates to the technical field of rolling of lithium battery pole pieces. The roller body fixing structure comprises a roller body and two roller necks respectively arranged at two ends of the roller body, wherein the two roller body fixing structure is respectively arranged on the two roller necks and comprises a bearing seat, a bearing, a locking piece, a power device and a locking piece, wherein the bearing is arranged in a hole formed in the bearing seat, the roller necks are rotatably connected in the bearing, one end of the locking piece is movably arranged in the bearing and is abutted to the roller necks, the power device is connected to the other end of the locking piece, the locking piece is acted through the power device to apply force, so that the axial locking force applied to the roller necks by the locking piece can be adjusted, the axial movement is effectively restrained, the stress uniformity of a pole piece can be improved, and the impact of an active coating is reduced. The application solves the problems of uneven pressure and large coating impact caused by axial movement.

Inventors

  • WU CHUNYA
  • Kuai Lijuan
  • ZHOU QINGZE

Assignees

  • 江苏远航锦锂新能源科技有限公司

Dates

Publication Date
20260505
Application Date
20260402

Claims (10)

  1. 1. The roller body fixing structure of the lithium battery pole piece rolling working section is characterized in that the roller body (1) comprises a roller body (11) and two roller necks (12) respectively arranged at two ends of the roller body (11), the two roller body (1) fixing structures are respectively arranged on the two roller necks (12), and the roller body (1) fixing structure comprises: a bearing block (21); the bearing (22) is arranged in a hole formed in the bearing seat (21), and the roll neck (12) is rotationally connected in the bearing (22); one end of the locking piece (23) is movably arranged in the bearing (22) and is abutted against the roll neck (12); a power device (24) connected to the other end of the locking member (23); Wherein the locking member (23) is forced by the action of the power device (24), so that the axial locking force applied by the locking member (23) to the roll neck (12) can be adjusted.
  2. 2. The roll body fixing structure according to claim 1, further comprising a damping circuit (25), an accumulator (26) and a magnetic field isolation tube (27), wherein the accumulator (26) is connected to the damping circuit (25) through the magnetic field isolation tube (27), and wherein the damping circuit (25) is mounted on a roll press apparatus.
  3. 3. The roll body fixing structure according to claim 2, characterized in that the damping circuit (25) is composed of four dampers (251), the four dampers (251) being provided on four side walls of the bearing housing (21), respectively, and the ends thereof being mounted on a roll press apparatus; the rod cavities and the rodless cavities of the two dampers (251) which are symmetrically distributed on the same bearing seat (21) are in cross connection through a first liquid path pipeline; Rod cavities of two dampers (251) with the same directions on two sides of the same roller body (1) are connected through a second liquid path pipeline, rod-free cavities are connected through a third liquid path pipeline, and the energy accumulator (26) is connected to the third liquid path pipeline through the magnetic field isolation pipe (27); and when the electromagnetic coil (252) is electrified, the magnetorheological fluid flowing through the second liquid path pipeline can be subjected to liquid-solid phase change.
  4. 4. The roller fixing structure according to claim 1, wherein the locking member (23) is a biasing lever (231).
  5. 5. The roll body fixing structure according to claim 1, wherein the locking member (23) comprises a force application rod (231), a swivel base (232) and two conical sleeves (233), wherein one end of the force application rod (231) is rotatably provided with the swivel base (232), the swivel base (232) is symmetrically provided with the two conical sleeves (233), a gap is reserved between the two conical sleeves (233), a groove matched with the roll neck (12) is formed on the inner side of one end of the conical sleeve (233), and a taper hole matched with the outer conical surfaces of the two conical sleeves (233) is formed on the inner ring of the bearing (22).
  6. 6. A roller fixing structure according to claim 1, characterized in that the power means (24) is a hydraulic cylinder or a pneumatic cylinder.
  7. 7. The roll body fixing structure according to claim 1, wherein the roll body (11) is a composite release coating layer formed by a high heat conduction functional layer, a bonding layer, a surface layer and a monomolecular film.
  8. 8. The roll body fixing system of the lithium battery pole piece rolling section is characterized by comprising the roll body fixing structure of the lithium battery pole piece rolling section and a central controller, wherein the roll body fixing structure of the lithium battery pole piece rolling section is as set forth in any one of claims 3 to 7; the central processing unit (3) is electrically connected with the power device (24) and the electromagnetic coil (252) and is used for controlling the actions of the power device (24) and the electromagnetic coil (252) according to a preset instruction.
  9. 9. Roller fixing system according to claim 8, characterized in that the bearing housing (21) is further provided with a vibration sensor (4); the central controller is connected with the vibration sensor (4) and is used for receiving vibration acceleration signals acquired by the vibration sensor (4); Performing fast Fourier transform analysis on the vibration acceleration signal to obtain a vibration frequency spectrum; Judging whether the vibration energy of the specific frequency band exceeds a preset safety threshold according to the vibration frequency spectrum, if yes, controlling the power device (24) to act to raise the axial locking force to a preset value, and simultaneously controlling the energizing current of the electromagnetic coil (252) to change to a state that the magnetorheological fluid can be subjected to liquid-solid phase change.
  10. 10. The roll body fixing system according to claim 8, wherein the number of the roll body fixing structures (2) is two, and the two sets of the roll body fixing structures (2) are axially arranged along the roll body (1) and are respectively arranged at two ends of the roll body (1).

Description

Roller body fixing structure and system for pole piece rolling working section of lithium battery Technical Field The invention relates to the technical field of rolling of lithium battery pole pieces, in particular to a roller body fixing structure and a roller body fixing system of a rolling working section of a lithium battery pole piece. Background In the pole piece rolling process of the lithium ion battery, the stable operation of the roller body is a key for guaranteeing the quality of the pole piece and avoiding sticking the roller. The roller body fixing system of the traditional roller press is mainly simple in mechanical locking, micron-sized axial movement is easy to occur under high-pressure rolling (20-50 MPa), so that the pole piece is stressed unevenly, an active coating is impacted and falls off, the roller surface is in unstable contact with the pole piece, the overflow and adhesion of an adhesive are aggravated, the existing anti-sticking coating (such as chromeplate and Teflon) is easy to wear due to vibration impact, and the service life is shortened. For example, in the patent number CN112310338B, a pole piece calendaring system and pole piece calendaring process are provided, where the system only includes a base press roll and an anti-sticking oil coating device, the roll body is fixed by adopting a traditional mechanical locking structure (specific vibration damping design is not disclosed), and the sticking roll is only improved by anti-sticking oil, and the problems of uneven pressure and large coating impact caused by axial movement are not solved yet. Disclosure of Invention The application mainly aims to provide a roller body fixing structure and a roller body fixing system for a rolling working section of a lithium battery pole piece, so as to solve the problems of uneven pressure and large coating impact caused by vibration. In order to achieve the above object, according to one aspect of the present application, there is provided a roll body fixing structure of a roll pressing section of a lithium battery pole piece. The roller body fixing structure of the lithium battery pole piece rolling working section comprises a roller body and two roller necks respectively arranged at two ends of the roller body, wherein the two roller body fixing structures are respectively arranged on the two roller necks, the roller body fixing structure comprises a bearing seat, a bearing, a locking piece and a power device, the bearing is arranged in a hole formed in the bearing seat, the roller necks are rotatably connected in the bearing, one end of the locking piece is movably arranged in the bearing and is abutted against the roller necks, the power device is connected to the other end of the locking piece, and the power device acts to apply force to the locking piece, so that the axial locking force applied to the roller necks by the locking piece can be adjusted. Preferably, the hydraulic damping device further comprises a damping loop, an energy accumulator and a magnetic field isolation pipe, wherein the energy accumulator is connected to the damping loop through the magnetic field isolation pipe, and the damping loop is installed on the roller press equipment. Preferably, the damping loop is composed of four dampers, the four dampers are respectively arranged on four side walls of the bearing seat, the end parts of the four dampers are arranged on the roller press equipment, rod cavities of the two dampers symmetrically distributed on the same bearing seat are connected with rodless cavities through first liquid path pipelines in a cross mode, rod cavities of the two dampers with the same directions on two sides of the same roller body are connected through second liquid path pipelines, the rodless cavities are connected through third liquid path pipelines, the energy accumulator is connected to the third liquid path pipelines through the magnetic field isolation pipe, electromagnetic coils are tightly wound on the second liquid path pipelines, and when the electromagnetic coils are electrified, magnetorheological fluid flowing through the second liquid path pipelines can be subjected to liquid-solid phase change. Preferably, the locking member is a force applying rod. Preferably, the locking piece comprises a force application rod, a swivel seat and two conical sleeves, wherein one end of the force application rod is rotatably provided with the swivel seat, two conical sleeves are symmetrically arranged on the swivel seat, a gap is reserved between the two conical sleeves, a groove matched with the roll neck is formed in the inner side of one end of each conical sleeve, and a conical hole matched with the outer conical surfaces of the two conical sleeves is formed in the inner ring of the bearing. Preferably, the power device is a hydraulic cylinder or a pneumatic cylinder. Preferably, the roller body is a composite anti-sticking coating formed by arranging a high heat conduction functi