Follow-up pole piece calendering device and coating machine
By using a follow-up electrode calendering device to adjust the tension using gravity, the wrinkling problem caused by the difference in extension between the coating area and the tab area of the lithium-ion battery electrode is solved, thereby improving production quality and reducing equipment costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-17
AI Technical Summary
The difference in stretching between the coating area and the tab area of lithium-ion battery electrodes causes wrinkles, affecting production quality.
A follow-up electrode calendering device is adopted, which works in concert with the first traction mechanism, the extension mechanism and the tail traction mechanism to ensure that the electrode tab area is always under pressure and extended, and uses gravity to adjust the tension to avoid wrinkles.
This improved the flatness and production quality of the electrode sheets while reducing equipment costs.
Smart Images
Figure CN223996928U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrode production technology, and in particular to a follow-up electrode rolling device. Background Technology
[0002] Lithium-ion battery electrodes are battery components in which the surface of metal foil is coated with battery active materials. The uncoated area is the tab area. Since the tab area is not coated, the total thickness of the tab area is less than that of the coated area. As a result, the tab area is not compressed and does not stretch during rolling. The stretching of the coated area and the lack of stretching of the tab area cause the electrode surface to appear wrinkled, which affects subsequent production. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a follow-up electrode calendering device and a coating machine. The follow-up electrode calendering device ensures that the tab area of the electrode is always under pressure and stretched, avoiding the problem of wrinkles appearing on the electrode surface due to the stretching of the coating area and the lack of stretching in the tab area. The coating machine utilizes the aforementioned follow-up electrode calendering device, thereby improving product quality.
[0004] In a first aspect, the follow-up electrode rolling device according to an embodiment of the present utility model includes: a first traction mechanism, an extension mechanism, and a tail traction mechanism arranged sequentially along the electrode conveying direction, wherein at least one of the first traction mechanism, the extension mechanism, and the tail traction mechanism is provided with a protrusion that can abut against the tab area of the electrode.
[0005] Both the first traction mechanism and the tail traction mechanism include a first roller and a second roller arranged in a vertical direction. The electrode sheet can pass through the gap between the first roller and the second roller, and the outer circumferential walls of the first roller and the second roller can always be pressed against the electrode sheet.
[0006] The extension mechanism can pull down the electrode located between the first traction mechanism and the last traction mechanism under the action of gravity.
[0007] The follow-up electrode calendering apparatus according to the embodiments of this utility model has at least the following beneficial effects: The follow-up electrode calendering apparatus provided in this application mainly consists of a first traction mechanism, an extension mechanism, and a tail traction mechanism. At least one of the first traction mechanism, extension mechanism, and tail traction mechanism is provided with a protrusion that can abut against the tab area of the electrode sheet. Both the first traction mechanism and the tail traction mechanism include a first roller and a second roller arranged vertically. The electrode sheet passes through the gap between the two rollers, and the outer walls of the two rollers always press the electrode sheet tightly. The extension mechanism, under the action of gravity, ensures that the middle electrode sheet is subjected to sufficient tension.
[0008] Specifically, the tail traction mechanism and the head traction mechanism work together to guide and press the electrode sheet into place. The electrode sheet moves under the traction of the main traction mechanism, while the tail traction mechanism and the head traction mechanism rotate without power under the pull of the electrode sheet. The extension mechanism of this application applies tension to the electrode sheet by gravity and can automatically adjust the tension on the electrode sheet to maintain the flatness of the electrode sheet during the calendering process. Even if the speed difference between the tail traction mechanism and the head traction mechanism causes fluctuations in the length of the electrode sheet between them and changes in the vertical position of the electrode sheet, the extension mechanism provided by this application can follow the position change of the electrode sheet under the action of gravity, always pressing the tab area of the electrode sheet, automatically adjusting the electrode sheet tension to adapt to dynamic needs, and ensuring that the tab area of the electrode sheet can always be pressed and extended. This avoids the problem of wrinkles on the surface of the electrode sheet caused by the extension of the coating area and the lack of extension of the tab area, while also reducing the cost of the equipment.
[0009] According to the follow-up electrode calendering apparatus of the present invention, the first roller includes a first main roller body and a first protruding ring disposed on the outer circumferential wall of the first main roller body. The first protruding ring is a protrusion that abuts against the tab area of the electrode sheet. The first protruding ring can be embedded into the tab area of the electrode sheet, and the first protruding ring can make the tab area of the electrode sheet abut against the roller body of the second roller.
[0010] According to the follow-up electrode rolling device of this utility model embodiment, the width of the first protrusion ring is the same as the width of the electrode tab area of the electrode.
[0011] According to the follow-up electrode calendering device of this utility model embodiment, the first protruding ring is a rubber ring wrapped around the outer circumference of the first main roller. When the first protruding ring abuts against the electrode tab area, the height of the first protruding ring is the same as the thickness of the coating area of the electrode.
[0012] or;
[0013] The outer circumference of the first protruding ring is provided with an adhesive layer. When the first protruding ring abuts against the tab area, the sum of the thickness of the first protruding ring and the thickness of the adhesive layer is equal to the thickness of the tab area.
[0014] According to the follow-up electrode calendering device of the present invention, the second roller includes a second main roller body and a second protruding ring disposed on the outer circumferential wall of the second main roller body. The second protruding ring is a protrusion that abuts against the tab area of the electrode sheet. The second protruding ring can be pressed against the tab area of the embedded electrode sheet. The first protruding ring can keep the tab area of the electrode sheet and the second protruding ring in a pressed state.
[0015] According to the follow-up electrode rolling device of this utility model embodiment, the width of the second protrusion ring is the same as the width of the electrode tab area of the electrode.
[0016] According to the follow-up electrode calendering device of this utility model embodiment, the second protruding ring is a rubber ring wrapped around the outer circumference of the second main roller. When the second protruding ring abuts against the electrode tab area, the height of the second protruding ring is the same as the thickness of the coating area of the electrode.
[0017] or;
[0018] The outer circumference of the second protruding ring is provided with an adhesive layer. When the second protruding ring abuts against the tab area, the sum of the thickness of the second protruding ring and the thickness of the adhesive layer is equal to the thickness of the tab area.
[0019] According to the embodiment of the present utility model, the follow-up electrode calendering device includes an extension mechanism including an extension roller and a third protruding ring disposed on the outer circumference of the extension roller. The third protruding ring is a protrusion that abuts against the tab area of the electrode sheet and can be embedded into the tab area of the electrode sheet.
[0020] According to the follow-up electrode rolling device of this utility model embodiment, the width of the third protrusion ring is the same as the width of the electrode tab area.
[0021] According to the follow-up electrode calendering device of this utility model embodiment, the third protruding ring is a rubber ring wrapped around the outer wall of the circumference of the stretching roller. When the third protruding ring abuts against the tab area, the height of the third protruding ring is the same as the thickness of the tab area of the electrode sheet.
[0022] or;
[0023] The outer circumference of the third protrusion ring is provided with an adhesive layer. When the third protrusion ring abuts against the tab area, the sum of the thickness of the third protrusion ring and the thickness of the adhesive layer is equal to the thickness of the tab area.
[0024] According to the follow-up electrode calendering device of this utility model embodiment, the first roller is a rubber roller;
[0025] And / or;
[0026] The second roller is a steel roller.
[0027] Secondly, the coating machine according to the embodiments of the present invention includes the above-mentioned follow-up electrode calendering device.
[0028] The coating machine according to the embodiments of this utility model has at least the following beneficial effects: The coating machine of this application uses the above-mentioned follow-up electrode calendering device. The follow-up electrode calendering device provided in this application mainly consists of a first traction mechanism, an extension mechanism, and a tail traction mechanism. At least one of the first traction mechanism, extension mechanism, and tail traction mechanism is provided with a protrusion that can abut against the tab area of the electrode sheet. Both the first traction mechanism and the tail traction mechanism include a first roller and a second roller arranged vertically. The electrode sheet passes through the gap between the two rollers, and the outer walls of the two rollers always press the electrode sheet tightly. The extension mechanism, under the action of gravity, ensures that the middle electrode sheet is subjected to sufficient tension.
[0029] Specifically, the tail traction mechanism and the head traction mechanism work together to guide and press the electrode sheet into place. The electrode sheet moves under the traction of the main traction mechanism, while the tail traction mechanism and the head traction mechanism rotate without power under the pull of the electrode sheet. The extension mechanism of this application applies tension to the electrode sheet by gravity and can automatically adjust the tension on the electrode sheet to maintain the flatness of the electrode sheet during the calendering process. Even if the speed difference between the tail traction mechanism and the head traction mechanism causes fluctuations in the length of the electrode sheet between them and changes in the vertical position of the electrode sheet, the extension mechanism provided by this application can follow the position change of the electrode sheet under the action of gravity, always pressing the tab area of the electrode sheet, automatically adjusting the electrode sheet tension to adapt to dynamic needs, and ensuring that the tab area of the electrode sheet can always be pressed and extended. This avoids the problem of wrinkles on the surface of the electrode sheet caused by the extension of the coating area and the lack of extension of the tab area, while also reducing the cost of the equipment.
[0030] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0031] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0032] Figure 1 This is a structural diagram of the follow-up electrode rolling device according to an embodiment of the present invention;
[0033] Figure 2 This is a top view of the follow-up electrode rolling apparatus according to an embodiment of the present invention;
[0034] Figure 3 This is a cross-sectional view of the electrode structure.
[0035] Explanation of reference numerals in the attached figures:
[0036] First traction mechanism 1;
[0037] Tail traction mechanism 2;
[0038] Extension mechanism 3;
[0039] First roller 100; First main roller body 110; First raised ring 120;
[0040] Second roller 200; Second main roller body 210; Second raised ring 220;
[0041] 300 stretching roller; 310 third raised ring;
[0042] Electrode area 400; Coating area 410; Tab area 420. Detailed Implementation
[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0044] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.
[0045] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.
[0046] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0047] This application provides a coating machine (not shown), wherein the coating machine uses the follow-up electrode calendering device provided in this application.
[0048] Among them, such as Figure 3 As shown, the electrode 400 includes a tab region 420 and coating regions 410 disposed on both sides of the tab region 420. As shown in the figure, the coating region 410 has a greater thickness than the tab region 420 after coating.
[0049] Specifically, refer to Figures 1 to 2The follow-up electrode calendering device includes a first traction mechanism 1, an extension mechanism 3, and a tail traction mechanism 2 arranged sequentially along the electrode 400 conveying direction. The first traction mechanism 1 and the tail traction mechanism 2 have the same structure. Both the first traction mechanism 1 and the tail traction mechanism 2 include a first roller 100 and a second roller 200 arranged vertically. The electrode 400 can pass through the gap between the first roller 100 and the second roller 200. The outer circumferential walls of the first roller 100 and the second roller 200 can always be pressed against the electrode 400. The extension mechanism 3 can make the electrode 400 located between the first traction mechanism 1 and the tail traction mechanism 2 subject to sufficient tension under the action of gravity.
[0050] The follow-up electrode 400 calendering apparatus provided in this application mainly consists of a first traction mechanism 1, an extension mechanism 3, and a tail traction mechanism 2. Preferably, the first traction mechanism 1 and the tail traction mechanism 2 have the same structure, both including a first roller 100 and a second roller 200 in a vertical direction. The electrode 400 can pass through the gap between the two rollers, and the outer walls of the two rollers always press the electrode 400 tightly. Under the action of gravity, the electrode 400 located between the first traction mechanism 1 and the tail traction mechanism 2 in the extension mechanism 3 is subjected to sufficient tension.
[0051] Specifically, the tail traction mechanism 2 has the same structure as the first traction mechanism 1, and they work together to guide the electrode 400 into and press it. The electrode 400 moves under the traction of the main traction mechanism, while the tail traction mechanism 2 and the first traction mechanism 1 achieve unpowered rotation under the pull of the electrode 400. The extension mechanism 3 of this application applies tension to the electrode 400 by gravity and can also automatically adjust the tension on the electrode 400 to maintain the flatness of the electrode 400 during the rolling process. Even if the speed difference between the tail traction mechanism 2 and the head traction mechanism 1 causes fluctuations in the length of the electrode 400 between them, and changes in the vertical position of the electrode 400, the extension mechanism 3 provided in this application can still follow the position change of the electrode 400 under the action of gravity, always pressing the tab area 420 of the electrode 400, automatically adjusting the tension of the electrode 400, adapting to dynamic needs, and ensuring that the tab area 420 of the electrode 400 can always be compressed and extended. This avoids the problem of wrinkles appearing on the surface of the electrode 400 due to the extension of the coating area 410 and the lack of extension of the tab area 420. At the same time, it can also reduce the cost of the equipment.
[0052] According to some embodiments of this application, the first roller 100 includes a first main roller body 110 and a first protruding ring 120 disposed on the outer circumferential wall of the first main roller body 110. The first protruding ring 120 is capable of engaging with the tab area 420 of the embedded electrode 400, and the first protruding ring 120 is capable of causing the tab area 420 of the electrode 400 to abut against the roller body of the second roller 200.
[0053] The width of the first protruding ring 120 is the same as the width of the tab region 420 of the electrode 400. Simultaneously, the height of the first protruding ring 120 is the same as the thickness of the coating region 410 of the electrode 400.
[0054] Furthermore, the second roller 200 includes a second main roller body 210 and a second protruding ring 220 disposed on the outer circumferential wall of the second main roller body 210. The second protruding ring 220 is capable of engaging with the tab area 420 of the embedded electrode 400, and the first protruding ring 120 is capable of keeping the tab area 420 of the electrode 400 pressed against the second protruding ring 220. Similar to the first roller 100, the width of the second protruding ring 220 is the same as the width of the tab area 420 of the electrode 400, and the height of the second protruding ring 220 is the same as the thickness of the coating area 410 of the electrode 400.
[0055] As can be understood, as shown in the figure, when the first roller 100 and the second roller 200 press the electrode sheet 400, the first protruding ring 120 and the second protruding ring 220 are correspondingly inserted into the tab area 420 of the electrode sheet 400, while the part of the roller body outside the protruding ring is pressed against the coating area of the electrode sheet 400. This ensures that during the rolling and conveying process, the roller body can not only avoid squeezing the coating area of the electrode sheet 400, but also that the cooperation between the protruding ring and the tab area 420 can play a positioning role for the electrode sheet 400 during the rolling and conveying process.
[0056] According to some embodiments of this application, the stretching mechanism 3 includes an stretching roller 300 and a third protruding ring 310 disposed on the outer circumferential wall of the stretching roller 300. The third protruding ring 310 can be embedded into the tab region 420 of the electrode 400 and can abut against the tab region 420 of the electrode 400. Similarly, like the first roller 100 and the second roller 200, the width of the third protruding ring 310 of the stretching roller 300 is the same as the width of the tab region 420 of the electrode 400. However, the thickness of the third protruding ring 310 of the stretching roller 300 is adjustable.
[0057] That is, since the first traction mechanism 1 and the tail traction mechanism 2 simultaneously press the coating area 410 and the tab area 420 of the electrode sheet 400 together, the conveyor path length between the tab area 420 and the coating area 410 between the first traction mechanism 1 and the tail traction mechanism 2 is fixed. Assuming the path of the coating area 410 is L1 and the path of the tab area 420 is L2, the user can change the path L2 of the tab area 420 by adjusting the thickness of the third protruding ring 310 on the extension roller 300.
[0058] Understandably, as shown in the figure, the electrode sheets 400 of the first traction mechanism 1 and the tail traction mechanism 2 hang naturally under gravity. Simultaneously, the stretching roller 300 is held in place by the electrode sheets 400 under gravity, and the stretching mechanism 3 applies pressure to the electrode sheets 400, causing them to be subjected to tension. As can be seen from the figure, the electrode sheet 400 partially surrounds the stretching roller 300. Therefore, when the user adjusts the thickness of the third protruding ring 310, the third protruding ring 310 can generate a greater thrust on the tab area 420 of the electrode sheet 400, thus subjecting the tab area 420 to greater tension than before. The increase in L2 causes the tab area 420 to be tightened by excess tension. When the force exceeds its plastic deformation strength, it will cause plastic extension and lengthening, making the path length of the tab area 420 equal to that of the coating area 410 after rolling and extension.
[0059] Furthermore, the third protruding ring 310 on the stretching roller 300 further fixes the tab area 420, ensuring that the tab area 420 deforms synchronously with the coating area during the stretching process, preventing tab wrinkles or coating cracks.
[0060] Optionally, the first raised ring 120, the second raised ring 220 and the third raised ring 310 can all be detachably connected to the roller body so that the user can change to a suitable size according to the specifications of the electrode 400.
[0061] Optionally, the first protruding ring 120, the second protruding ring 220, and the third protruding ring 310 are all rubber rings. Because the rubber rings are elastic, they can adapt to minor fluctuations on the surface of the electrode 400 (such as uneven coating thickness or undulations at the edges of the electrode 400), ensuring that the tab area 420 is always uniformly pressed, avoiding excessive local pressure or poor contact that may be caused by rigid protrusions. At the same time, the contact surface between the rubber rings and the electrode 400 is a flexible contact, which can avoid scratches or indentations on the coating area caused by rigid protrusions, avoid damage to the electrode 400, and adapt to minor fluctuations on the surface of the electrode 400 (such as uneven coating thickness or undulations at the edges of the electrode 400), ensuring that the tab area 420 is always uniformly pressed, avoiding excessive local pressure or poor contact that may be caused by rigid protrusions.
[0062] Furthermore, under the follow-up tension control, the rubber ring can finely adjust the compression amount according to the tension change of the electrode 400. That is, when the tension increases, the friction force is automatically increased to prevent the tab area 420 from slipping; when the tension decreases, the clamping force is reduced to avoid deformation of the electrode 400.
[0063] Alternatively, an adhesive layer may be added to the surface of one or all of the first raised ring 120, the second raised ring 220, and the third raised ring 310. However, it should be noted that when an adhesive layer is added to the surface of the first raised ring 120 and the second raised ring 220, the sum of the thickness of the adhesive layer and the height of the raised ring in this application should be equal to the thickness of the tab area 420 to ensure that the rollers on both sides of the raised ring can abut against and press the coating area.
[0064] Optionally, the first roller 100 is a rubber roller, and the roller body of the second roller 200 is made of metal. Preferably, the second roller 200 is a steel roller. The rubber roller is lighter and will not exert excessive pressure on the electrode 400, thus preventing damage during transport. Furthermore, the initial traction mechanism 1 and the final traction mechanism 2 of this application are unpowered. That is, after the first roller 100 and the second roller 200 clamp the electrode, the rolling mechanism of the coating machine traction and transports the electrode 400. During transport, the electrode 400 simultaneously drives the first roller 100 and the second roller 200 to rotate. Therefore, when the second roller 200 is a steel roller, because of its greater mass, the combination of the rubber roller and the steel roller can ensure that the electrode 400 receives sufficient clamping force and tension when passing through the initial traction mechanism 1 and the final traction mechanism 2, without causing damage to the electrode 400.
[0065] According to some embodiments of this application, the coating machine may also be provided with a guiding mechanism for guiding the stretching mechanism 3. Specifically, the stretching roller 300 is provided with a connecting shaft, and the frame of the coating machine is provided with an adjusting bracket. The adjusting bracket is provided with a movable groove extending in the vertical direction, and the end of the connecting shaft away from the stretching roller 300 passes through the movable groove. The movable groove of the adjusting bracket can constrain the vertical movement of the stretching roller 300. The movable groove and the connecting shaft of the stretching roller 300 form a "shaft-groove" fit, constraining the stretching roller 300 to move only in the vertical direction, suppressing lateral or rotational offset, and achieving precise guidance of the stretching roller 300 through simple mechanical constraints. In the description of this specification, the reference to the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., means that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0066] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A trolley pole calendering device characterized by, The application relates to a polar plate conveying device. The first traction mechanism (1) and the tail traction mechanism (2) each comprise a first roller (100) and a second roller (200) arranged in the vertical direction, the polar plate (400) can pass through the gap between the first roller (100) and the second roller (200), and the circumferential outer wall of the first roller (100) and the second roller (200) can always be in pressure contact with the polar plate (400). The first roller (100) comprises a first main roller body (110) and a first protruding ring (120) arranged on the circumferential outer wall of the first main roller body (110), the first protruding ring (120) is the protruding part in pressure contact with the tab area (420) of the polar plate (400), the first protruding ring (120) can be embedded in the tab area (420) of the polar plate (400), and the first protruding ring (120) can make the tab area (420) of the polar plate (400) in pressure contact with the roller body of the second roller (200). The width of the first protruding ring (120) is the same as that of the tab area (420) of the polar plate (400).
2. The on-the-fly pole piece calendering apparatus of claim 1, wherein, The first protruding ring (120) is a rubber ring wound on the circumferential outer wall of the first main roller body (110), when the first protruding ring (120) is in pressure contact with the tab area (420), the height of the first protruding ring (120) is the same as the thickness of the coating area (410) of the polar plate (400).
3. The on-the-fly pole piece calendering apparatus of claim 2, wherein, Or; 4. The on-the-fly pole piece calendering apparatus of claim 2, wherein, The circumferential outer wall of the first protruding ring (120) is provided with a rubber layer, when the first protruding ring (120) is in pressure contact with the tab area (420), the sum of the thickness of the first protruding ring (120) and the thickness of the rubber layer is equal to the thickness of the tab area (420). The second roller (200) comprises a second main roller body (210) and a second protruding ring (220) arranged on the circumferential outer wall of the second main roller body (210), the second protruding ring (220) is the protruding part in pressure contact with the tab area (420) of the polar plate (400), the second protruding ring (220) can be embedded in the tab area (420) of the polar plate (400), and the first protruding ring (120) can make the tab area (420) of the polar plate (400) in pressure contact with the second protruding ring (220). The width of the second protruding ring (220) is the same as that of the tab area (420) of the polar plate (400).
5. The on-the-fly pole piece calendering apparatus of claim 2, wherein, 6. The pilot pole calendering apparatus of claim 5 wherein, 7. The on-the-fly pole piece calendering apparatus of claim 5, wherein, The second protruding ring (220) is a rubber ring wound on the circumferential outer wall of the second main roller body (210), and the height of the second protruding ring (220) is the same as the thickness of the coating area (410) of the pole piece (400) when the second protruding ring (220) abuts against the tab area (420). Or; The circumferential outer wall of the second protruding ring (220) is provided with a rubber layer, and the thickness of the second protruding ring (220) and the thickness of the rubber layer are equal to the thickness of the tab area (420) when the second protruding ring (220) abuts against the tab area (420).
8. The on-the-fly pole piece calendering apparatus of claim 1, wherein, The extension mechanism (3) comprises an extension roller (300) and a third protruding ring (310) provided on the circumferential outer wall of the extension roller (300), and the third protruding ring (310) is a protruding part abutting against the tab area (420) of the pole piece (400), and the third protruding ring (310) can be embedded into the tab area (420) of the pole piece (400).
9. The on-the-fly pole piece calendering apparatus of claim 8, wherein, The width of the third protruding ring (310) is the same as the width of the tab area (420) of the pole piece (400).
10. The pilot pole calendering apparatus of claim 8 wherein, The third protruding ring (310) is a rubber ring wound on the circumferential outer wall of the extension roller (300), and the height of the third protruding ring (310) is the same as the thickness of the tab area (420) of the pole piece (400) when the third protruding ring (310) abuts against the tab area (420). Or; The circumferential outer wall of the third protruding ring (310) is provided with a rubber layer, and the thickness of the third protruding ring (310) and the thickness of the rubber layer are equal to the thickness of the tab area (420) when the third protruding ring (310) abuts against the tab area (420).
11. The on-the-fly pole piece calendering apparatus of claim 1, wherein, The first roller (100) is a rubber roller. And / or; The second roller (200) is a steel roller.
12. Coating machine, characterized in that The follow-up type pole piece calendering device. The follow-up type pole piece calendering device.