Battery pole piece rolling device
By setting circumferential coil units inside the rolls to generate magnetic attraction for uniform rolling, the problems of uneven thickness and roll bending during the rolling process of battery electrode sheets are solved, resulting in more efficient rolling effect and extended equipment life.
Patent Information
- Application Number
- CN202520084117.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-13
AI Technical Summary
In the existing technology, there are problems such as uneven electrode thickness, easy wrinkling of empty foil at the edges, and easy breakage of the strip during the rolling process of battery electrode sheets. In addition, the rollers are prone to bending and deformation, which affects the quality of the electrode sheets and the life of the equipment.
Multiple coil units arranged circumferentially are set inside the roll. By energizing, magnetic attraction force is generated to uniformly press the roll, avoiding unevenness and roll bending caused by hydraulic thrust. A current regulating device is used to ensure constant roll pressure.
It achieves thickness uniformity and edge stability during the battery electrode rolling process, improves the service life and rolling effect of the equipment, and adapts to different rolling pressure requirements.
Smart Images
Figure CN223771101U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of battery manufacturing technology, and more specifically, to a battery electrode rolling device. Background Technology
[0002] Electrode rolling is a crucial step in lithium-ion battery production. This process aims to obtain electrodes of the required thickness while enhancing the adhesion between the active material and the current collector, preventing peeling during electrolyte immersion or battery use. Ideally, the electrodes should have uniform thickness and a smooth, even appearance in both the coated and uncoated areas. In related technologies, rolling primarily utilizes hydraulic cylinders supported by shafts at both ends of the rolls to apply pressure, allowing the electrodes to be rolled between the upper and lower rolls. However, this results in higher rolling pressure near the hydraulic cylinders and lower pressure in the middle, easily leading to uneven stress across the electrode width. This results in uneven electrode thickness, wrinkling of the uncoated edges, and increased risk of breakage during rolling. Furthermore, long-term use can cause the rollers to bend and deform, exacerbating these problems and affecting the electrode defect rate. Utility Model Content
[0003] The purpose of this disclosure is to provide a battery electrode rolling device to at least partially solve the problems existing in the related art.
[0004] To achieve the above objectives, this disclosure provides a battery electrode rolling device, comprising:
[0005] Base frame; and
[0006] Two rollers are respectively mounted on the base frame, and there is a roller gap between the two rollers for the battery electrode to extend into.
[0007] The two rolls contain at least one of a plurality of coil units arranged sequentially along the circumference. Each coil unit includes at least one coil. When the coil unit is energized, a magnetic attraction is generated between the two rolls.
[0008] Optionally, each of the two rolls is provided with a plurality of the coil units.
[0009] Optionally, each of the coil units includes a plurality of coils distributed radially.
[0010] Optionally, in the axial direction of the roll, each of the coils extends from one end of the roll to the other.
[0011] Optionally, the coil includes two straight segments extending along the axial direction and two arc segments connecting the corresponding ends of the two straight segments, wherein the arc segments are parallel to the cylindrical surface of the roll, and the straight segments of two adjacent coils in the circumferential direction are in contact with each other.
[0012] Optionally, it also includes a current regulating section disposed on the base frame, wherein a plurality of the coils are respectively slidably electrically connected to the current regulating section.
[0013] Optionally, the base frame includes a base plate and two vertical plates erected on the base plate, and the two rollers are rotatably mounted between the two vertical plates.
[0014] Optionally, the two rollers are arranged in a vertical direction, wherein at least one of the two rollers is movable relative to the vertical plate in the vertical direction.
[0015] Optionally, each end of the roll is provided with a rotating shaft. The rotating shaft corresponding to the lower roll is mounted on the vertical plate via a first bearing assembly. The rotating shaft corresponding to the upper roll is mounted on the vertical plate via a second bearing assembly. At least one of the first bearing assembly and the second bearing assembly can slide on the vertical plate in the vertical direction.
[0016] Optionally, the opposing surfaces of the two vertical plates are respectively provided with slide rails so that the first bearing assembly and / or the second bearing assembly can slide along the vertical direction.
[0017] Optionally, it also includes a clearance adjustment part for driving the first bearing assembly and / or the second bearing assembly to slide along the vertical direction.
[0018] Optionally, the gap adjustment part includes:
[0019] Two motors are respectively installed on the corresponding vertical plates;
[0020] Two first inclined blocks are respectively connected to the corresponding motors and have first inclined surfaces;
[0021] Two second inclined blocks, each having a second inclined surface, are respectively attached to the corresponding first inclined surface; and
[0022] Two support rods, the lower end of which is connected to the corresponding second inclined block, and the upper end of which is connected to the corresponding second bearing assembly.
[0023] When the motor drives the first inclined block to move, the first inclined surface can press the second inclined surface to cause the second inclined block to drive the second bearing assembly to move along the vertical direction.
[0024] Optionally, the vertical plate is provided with a horizontal stepped surface, and the first inclined block is movably disposed on the horizontal stepped surface.
[0025] The above technical solution involves arranging multiple coil units sequentially along the circumference within the roll. When these coil units are energized, they generate a magnetic field due to electromagnetic principles, creating a magnetic attraction that draws the two rolls closer together, thus providing the necessary roll pressure for the battery electrode. Furthermore, as the roll rotates, these circumferential coil units sequentially rotate to positions close to the roll gap, continuously providing a constant magnetic attraction. Compared to hydraulic thrust at the ends of the roll, this magnetic attraction acts more evenly and directly on the roll body, resulting in more uniform roll pressure across the roll gap. This avoids problems such as inconsistent roll thickness in the width direction (roll axis), wrinkled edges, and easy breakage of the battery electrode during the roll pressing process. This method of roll pressure formation also avoids the bending deformation caused by directly applying hydraulic thrust at both ends, improving the roll's service life. Furthermore, the roller pressing device provided in this disclosure can adjust the current of the coil according to the actual roller pressure requirements, so that it can meet different roller pressure requirements and has greater applicability.
[0026] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description
[0027] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0028] Figure 1 This is a schematic diagram of a first type of battery electrode rolling device exemplarily shown according to this disclosure;
[0029] Figure 2 This is a schematic diagram of a second type of battery electrode rolling device exemplarily shown according to this disclosure;
[0030] Figure 3 yes Figure 1 The side view of the battery rolling device shown in the figure;
[0031] Figure 4 This is a schematic diagram of the coil unit distribution of two rolls as exemplarily shown in this disclosure.
[0032] Explanation of reference numerals in the attached figures
[0033] 1-Base frame; 11-Base plate; 12-Vertical plate; 121-Slide rail; 122-Horizontal step surface; 2-Roller; 3-Roller gap; 4-Coil unit; 41-Coil; 411-Straight section; 412-Circular arc section; 5-Current adjustment unit; 6-Rotating shaft; 70-Second bearing assembly; 8-Gap adjustment unit; 81-Motor; 82-First inclined block; 83-Second inclined block; 84-Support rod; 91-First inclined surface; 92-Second inclined surface. Detailed Implementation
[0034] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.
[0035] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer," "upper" and "lower" may refer to the structure of the corresponding component itself, or they may be defined based on the actual direction of use of the corresponding component. For example, "two rolls each have multiple coil units inside" means that the coil units are located inside the roll body; "two rolls arranged in an "upper and lower" direction" means that when the rolling device is in use, the two rolls are arranged one above the other in the height direction. The terms "circumferential," "radial," and "axial" mentioned in this disclosure are based on the definition of the roll. "Axial" refers to the length direction of the roll, "radial" refers to the diameter direction of the roll, and "circumferential" refers to the direction of the circumferential surface of the roll.
[0036] In addition, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.
[0037] Reference Figures 1-4 This disclosure provides an exemplary battery electrode rolling device, including a base frame 1 and two rollers 2 respectively mounted on the base frame 1, the rollers 2 being rotatable relative to the base frame 1. A rolling gap 3 is provided between the two rollers 2 for the battery electrode to extend into. At least one of the two rollers 2 contains a plurality of coil units 4 arranged sequentially along the circumference, for example in... Figure 1 In the illustrated embodiment, each of the two rollers 2 may contain a plurality of coil units 4. Figure 2In the illustrated embodiment, the lower roller 2 may contain a coil unit 4. Alternatively, in other embodiments, the upper roller 2 may contain a coil unit 4, which is not a limitation of this disclosure. Each coil unit 4 includes at least one coil 41, and when energized, the coil unit 4 can generate a magnetic attraction between the two rollers 2. It should be noted that when only one roller 2 contains the coil unit 4, the other roller 2 needs to be made of a magnetic material to generate a magnetic attraction with the coil unit 4.
[0038] This disclosure does not limit the number of coils 41 included in each coil unit 4, for example in Figure 4 In the illustrated embodiment, each coil unit 4 may include five coils 41. When the coils 41 are energized, the coils 41 of the two rollers 2 can respectively form magnetic fields. The two magnetic fields can interact to generate a magnetic attraction force, which can cause the two rollers 2 to tend to move closer to each other, thereby rolling the battery electrode sheets located within the rolling gap 3. Furthermore, in some other embodiments, each coil unit 4 may include one, two, three, six, or other coils 41. This disclosure does not limit the number of coils 41 included in all coil units 4 to be equal; some coil units 4 may include five coils 41, while the remaining coil units 4 may include four coils 41. In addition, in the embodiments of this disclosure, the shape and size of each coil 41 may be the same or different. The current magnitude and direction of the multiple coils 41 can be adjusted independently, thereby ensuring that when the two rollers 2 rotate to any position, the magnetic attraction force between the two rollers 2 remains constant by adjusting the current of each coil 41 in real time. This current adjustment process can be tested and simulated during the production stage and ultimately preset so that the current can be periodically adjusted according to the rotation of the rollers 2 during use. This disclosure does not limit the specific adjustment process of the current of each coil 41, as long as it can ensure that the magnetic attraction between the two rollers 2 remains constant during the rotation of the roller 2. Of course, it is more beneficial to adjust the current and keep the magnetic attraction constant by designing that the number of coils 41 included in all coil units 4 is the same, and that all coils 41 are of the same shape and size, and that all coil units 4 can be evenly arranged in the circumferential direction.
[0039] In the embodiments of this disclosure, the number of coil units 4 can be 6, 8, etc., which can be integrally embedded in the roll 2 during the forming process. Alternatively, an installation position can be reserved in the roll 2 so that the coil units 4 can be installed inside the roll 2 later. Multiple coils 41 can be individually embedded in the roll 2, or they can be formed into a whole (e.g., a coil frame) and then embedded into the roll 2.
[0040] By using the above scheme, multiple coil units 4 arranged sequentially along the circumference are set inside the roll 2. When the coil unit 4 is energized, it generates a magnetic field due to electromagnetic principles, thereby forming a magnetic attraction that causes the two rolls 2 to move closer to each other, thus providing the necessary roll pressure for the battery electrode. Furthermore, as the roll 2 rotates, the multiple coil units 4 along the circumference will sequentially rotate to a position close to the roll gap 3, thereby continuously providing a constant magnetic attraction force during the rotation of the roll 2. Compared to setting hydraulic thrust at the rotating shafts at both ends of the roll 2, this magnetic attraction force can act more evenly and directly on the roll body, resulting in a more uniform roll pressure at various positions in the roll gap 3. This avoids problems such as inconsistent roll thickness in the width direction (axial direction of the roll 2), wrinkled edges, and easy breakage of the battery electrode during the roll pressing process. Moreover, this method of forming roll pressure also avoids the bending deformation problem of the roll 2 caused by directly setting hydraulic thrust at both ends, thus improving the service life of the roll 2. Furthermore, the roller pressing device provided in this disclosure can adjust the current of coil 41 according to the actual roller pressure requirements, so that it can meet different roller pressure requirements and has greater applicability.
[0041] Reference Figure 4 In the embodiments of this disclosure, each of the two rollers 2 may contain a plurality of coil units 4. Providing multiple coil units 4 within each of the two rollers 2 increases the magnetic attraction between them. Furthermore, it offers more options for adjusting the current of the coils 41, resulting in a wider range of magnetic attraction adjustment between the two rollers 2 and making it easier to ensure that the magnetic attraction remains constant during the rotation of the rollers 2.
[0042] Reference Figure 4 In the embodiments of this disclosure, each coil unit 4 may include multiple coils 41 distributed radially, for example, three, five, etc. By cooperating with multiple coils 41, the magnitude of the magnetic attraction between the two rolls 2 can be increased. Furthermore, the superimposed magnetic fields generated by the multiple coils 41 allow for a wider range of adjustment of the magnetic attraction between the two rolls 2. In addition, the more coils 41 there are, the more options there are for current adjustment in the rolling device, making it easier to ensure that the magnetic attraction remains constant during the rotation of the rolls 2. For example, the current of all coils 41 in the same coil unit 4 can be increased or decreased simultaneously, or the current of some coils 41 in the same coil unit 4 can be increased while the current of the remaining coils 41 in the coil unit 4 can be decreased. Alternatively, the current directions of the multiple coils 41 in the same coil unit 4 can be different from each other.
[0043] Reference Figure 1 and Figure 2In the embodiments of this disclosure, each coil 41 can extend from one end of the roll 2 to the other along its axial direction. This design allows the coil 41 to cover the roll 2 axially, maximizing the coverage of the magnetic field generated by the coil 41 on the roll 2. This, in turn, allows the aforementioned magnetic attraction force to act more evenly at various positions along the axial direction of the roll 2, thereby improving the consistency of axial rolling pressure when the roll 2 presses the battery electrode sheets and ensuring uniform thickness of the pressed battery electrode sheets. Furthermore, this distribution of magnetic attraction force across various axial positions of the roll 2 avoids the problem of axial bending caused by forces at both ends of the roll 2, thus improving the service life of the roll 2.
[0044] This disclosure does not limit the shape of coil 41, for example in Figure 4 In the illustrated embodiment, coil 41 may include two straight segments 411 extending along the axial direction, and two arc segments 412 connecting the corresponding ends of the two straight segments 411. The arc segments 412 are parallel to the cylindrical surface of the roll 2, and the straight segments 411 of two adjacent coils 41 in the circumferential direction are in close contact with each other. This design ensures that when multiple coil units 4 are distributed circumferentially, the magnetic field at adjacent positions of two coil units 4 is nearly identical to the magnetic field at the body position of the coil unit 4. This allows for the consistency of the magnetic field at various positions of the roll 2 during rotation, even with limited current adjustment. In other words, if the two arc segments 412 are also replaced with straight lines, a region of differing magnetic fields will appear between adjacent coil units 4, meaning the magnetic field at adjacent positions differs significantly from the magnetic field of the coil 41 body. This would require a wider range of current adjustments to maintain the consistency of the magnetic attraction force during the rotation of the roll 2, increasing the difficulty of adjustment.
[0045] In order to achieve real-time current adjustment of each coil 41, refer to Figure 1 and Figure 2In the embodiments of this disclosure, the battery electrode rolling device may further include a current regulating section 5 disposed on the base frame 1, with multiple coils 41 respectively slidably electrically connected to the current regulating section 5. By setting the coils 41 and the current regulating section 5 as "sliding electrically connected," the risk of the coils 41 being twisted off when rotating with the roller 2 can be avoided. The current regulating section 5 refers to a power source capable of providing variable current to the coils 41 according to actual needs, and its specific structure can be adaptively designed. Here, "sliding electrically connected" means that the coils 41 can rotate with the roller 2 relative to the current regulating section 5 and maintain electrical connection. Specifically, a conductive slip ring structure can be used, which can be composed of a stator and a rotor. The stator is fixed, and the rotor rotates with the coils 41. The stator and rotor each have corresponding conductive rings and brushes. The brushes are in close contact with the conductive rings. When the rotor rotates, the brushes slide on the conductive rings, thereby realizing the transmission of current from the fixed power source to the coils 41. Alternatively, a rolling rotary electrical transmission device can be used. This device mainly includes a rotating shaft, a housing, an inner conductive ring, an outer conductive ring, a flexible ring, an inner insulating ring, and an outer insulating ring. The inner conductive ring is mounted on the rotating shaft and rotates with the coil 41, while the outer conductive ring is mounted on the housing and remains stationary. Corresponding grooves are formed on the inner and outer conductive rings, and the flexible ring is installed between the grooves. Continuous electrical transmission from the coil 41 to the fixed part is achieved through the rolling contact of the flexible ring between the inner and outer conductive rings.
[0046] In the embodiments of this disclosure, the base frame 1 may include a base plate 11 and two vertical plates 12 erected on the base plate 11, and two rollers 2 are rotatably mounted between the two vertical plates 12.
[0047] Furthermore, in an embodiment of this disclosure, the two rollers 2 can be arranged vertically, wherein at least one of the two rollers 2 can move relative to the vertical plate 12 in the vertical direction. This design allows control of the vertical movement of at least one of the two rollers 2, thereby changing the roller gap 3 between the two rollers 2, enabling the roller pressing device to meet the roller pressing requirements for battery electrode sheets of different thicknesses.
[0048] In order to rotatably mount the two rollers 2 onto the vertical plate 12, refer to Figures 1-3In the embodiments of this disclosure, each end of the roller 2 may be provided with a rotating shaft 6. The rotating shaft 6 corresponding to the lower roller 2 can be mounted on the vertical plate 12 via a first bearing assembly; the rotating shaft 6 corresponding to the upper roller 2 can be mounted on the vertical plate 12 via a second bearing assembly 70. At least one of the first bearing assembly and the second bearing assembly 70 can slide on the vertical plate 12 in a vertical direction. Here, "bearing assembly" may include a bearing housing and a bearing mounted on the bearing housing. The bearing housing is mounted on the vertical plate 12, and the rotating shaft 6 is rotatably mounted on the bearing housing via the bearing. "At least one of the first bearing assembly and the second bearing assembly 70 can slide on the vertical plate 12 in a vertical direction" means that the bearing housing can slide on the vertical plate 12 in a vertical direction.
[0049] Reference Figure 3 In the embodiments of this disclosure, the opposing surfaces of the two vertical plates 12 can each be provided with a slide rail 121 for the first bearing assembly or the second bearing assembly 70 to slide in the vertical direction. Alternatively, the slide rail 121 can also allow the first bearing assembly and the second bearing assembly 70 to slide in the vertical direction simultaneously; this disclosure does not limit this. The slide rail 121 can be assembled with the vertical plates 12 or it can be integrally formed. By providing the slide rail 121, the horizontal movement of the bearing assembly can be restricted, allowing it to move only in the vertical direction, thus preventing the roller 2 from disengaging from between the two vertical plates 12.
[0050] In order to drive at least one of the two rollers 2 to move and thereby adjust the roller gap 3, in embodiments of this disclosure, the battery electrode rolling device may further include a gap adjusting part 8 for driving the first bearing assembly or the second bearing assembly 70 to slide in the vertical direction. Alternatively, the gap adjusting part 8 may also simultaneously drive the first bearing assembly and the second bearing assembly 70 to slide in the vertical direction.
[0051] This disclosure does not limit the specific structure of the gap adjustment section 8, for example, in Figures 1-3In the illustrated embodiment, the gap adjustment unit 8 may include two motors 81 respectively disposed on the corresponding vertical plates 12, two first inclined blocks 82 respectively connected to the corresponding motors 81 and having a first inclined surface 91, two second inclined blocks 83 respectively having a second inclined surface 92, and two support rods 84. The two second inclined surfaces 92 are respectively attached to the corresponding first inclined surfaces 91. The lower end of the support rod 84 can be connected to the corresponding second inclined block 83, and the upper end can be connected to the corresponding second bearing assembly 70. When the motors 81 drive the first inclined blocks 82 to move, the first inclined surfaces 91 can compress the second inclined surfaces 92, causing the second inclined blocks 83 to drive the second bearing assembly 70 to move in the vertical direction. Here, the motors 81 can be linear motors, which can directly drive the first inclined blocks 82 to move. Alternatively, the motors 81 can also be rotary motors, which can indirectly drive the first inclined blocks 82 to move through lead screws, cranks, sliders, etc. In addition to the above structure, in some other embodiments, the gap adjustment unit 8 may also be a lifting hydraulic cylinder or the like directly supported on both sides of the rotating shafts 6 of the roll 2.
[0052] Reference Figure 1 In the embodiments of this disclosure, the vertical plate 12 may be provided with a horizontal stepped surface 122, and the first inclined block 82 is movably disposed on the horizontal stepped surface 122. With this design, the gravity of the upper roller 2 can be applied to the horizontal stepped surface 122 through the support rod 84, the second inclined block 83, and the first inclined block 82, avoiding the gravity from directly acting on the output shaft of the motor 81, thus protecting the motor 81 and improving its service life.
[0053] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.
[0054] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.
[0055] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.
Claims
1. A battery electrode sheet rolling device, characterized by, The utility model relates to a battery pole piece rolling device, including: a base frame; and two rollers, which are respectively installed on the base frame and have a rolling gap between the two rollers for the battery pole piece to extend into, wherein at least one of the two rollers is provided with a plurality of coil units arranged in sequence in the circumferential direction, each coil unit comprising at least one coil, and when the coil unit is powered, a magnetic attraction force is generated between the two rollers.
2. The battery pole piece rolling device according to claim 1, wherein Each of the two rollers is provided with a plurality of coil units.
3. The battery pole piece rolling apparatus of claim 1, wherein, Each coil unit comprises a plurality of coils distributed in the radial direction.
4. The battery pole piece rolling apparatus of claim 1, wherein, In the axial direction of the roller, each coil extends from one end of the roller to the other end.
5. The battery pole piece rolling apparatus according to claim 4, wherein The coil comprises two straight segments extending in the axial direction and two circular arc segments connected between the corresponding ends of the two straight segments, wherein the circular arc segments are parallel to the cylindrical surface of the roller, and the straight segments of two adjacent coils in the circumferential direction are in contact with each other.
6. The battery pole piece rolling apparatus according to any one of claims 1-5, wherein, Further comprising a current adjusting part provided on the base frame, and a plurality of coils are respectively electrically connected to the current adjusting part in a sliding manner.
7. The battery pole piece rolling apparatus according to any one of claims 1-5, wherein, The base frame comprises a bottom plate and two vertical plates erected on the bottom plate, and two rollers are rotatably mounted between the two vertical plates.
8. The battery pole piece rolling apparatus of claim 7, wherein, The two rollers are arranged in the up-down direction, wherein at least one of the two rollers can move relative to the vertical plate in the up-down direction.
9. The battery pole piece rolling apparatus of claim 8, wherein, Both ends of the roller are respectively provided with a rotating shaft, and the rotating shaft corresponding to one of the two rollers on the lower side is mounted on the vertical plate through a first bearing assembly; the rotating shaft corresponding to one of the two rollers on the upper side is mounted on the vertical plate through a second bearing assembly, wherein at least one of the first bearing assembly and the second bearing assembly can slide on the vertical plate in the up-down direction.
10. The battery pole piece rolling apparatus of claim 9, wherein, The opposite surfaces of the two vertical plates are respectively provided with sliding rails for the first bearing assembly and / or the second bearing assembly to slide in the up-down direction.
11. The battery pole piece rolling apparatus of claim 9, wherein, Further comprising a gap adjusting part for driving the first bearing assembly and / or the second bearing assembly to slide in the up-down direction.
12. The battery pole piece rolling apparatus of claim 11, wherein, The gap adjusting part comprises: two motors respectively provided on the corresponding vertical plates; two first inclined blocks respectively connected to the corresponding motors and having first inclined surfaces; two second inclined blocks respectively having second inclined surfaces, and the two second inclined surfaces are respectively attached to the corresponding first inclined surfaces; and two support rods, the lower end of the support rod is connected to the corresponding second inclined block, and the upper end is connected to the corresponding second bearing assembly, wherein when the motor drives the first inclined block to move, the first inclined surface can press the second inclined surface to drive the second inclined block to move in the up-down direction.
13. The battery pole piece rolling apparatus of claim 12, wherein, The vertical plate is provided with a water platform step surface, and the first inclined block is movably arranged on the water platform step surface.