Pole piece calendering device and coating machine

Abstract

The utility model discloses a pole piece calendering device and a coater, the pole piece calendering device comprises a swing mechanism arranged in a pole piece calendering conveying area and an extension mechanism used for calendering a pole lug area of a pole piece, the swing mechanism comprises an inductor, a first swing roller and a second swing roller, and the first swing roller and the second swing roller are arranged along pole piece conveying. The sensor is electrically connected with the first swing roller and the second swing roller, the pole piece can be wound around the first swing roller and the second swing roller, the first swing roller and the second swing roller can swing so as to move in the vertical direction, and the sensor can obtain the swing amplitude of the first swing roller and the second swing roller so as to adjust the conveying speed of the pole piece or the rolling speed of the pole piece. The pole piece conveying tension is monitored in real time through vertical movement of the first swing roller or the second swing roller of the swing mechanism, the sensor detects the swing amplitude of the swing rollers to form closed-loop control, the conveying speed is automatically adjusted, the problem of pole piece wrinkling or breakage caused by tension fluctuation in traditional equipment is solved, and the yield is increased.

Description

Technical Field

[0001] This utility model relates to the field of coating machine technology, and in particular to an electrode calendering device and a coating machine. Background Technology

[0002] After coating and drying, the peel strength between the active material and the current collector foil is very low, requiring rolling to enhance the adhesion between the active material and the foil, preventing peeling during electrolyte immersion and battery use. Simultaneously, electrode rolling compresses the cell volume, increasing the cell's energy density, and reduces the porosity between the active material, conductive agent, and binder within the electrode, thereby lowering battery resistance and improving battery performance. To improve the density and thickness consistency of the battery electrode surface material, both positive and negative electrodes must undergo rolling after the coating process; this process is called battery electrode rolling.

[0003] Currently, in lithium-ion battery production, due to the different thicknesses of the coating area and the tab area, wrinkles are easily caused by the different elongation of the coating area and the tab area after the electrode is rolled. Generally, the tab area is rolled to make its elongation equal to that of the coating area after rolling, which can eliminate wrinkles. However, in actual production, the actual rolling speed of the rolling surface of the tab area will differ from the preset rolling speed or the actual conveying speed of the electrode as a whole, so the effect of eliminating wrinkles still needs to be improved. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes an electrode calendering apparatus and a coating machine. The electrode calendering apparatus can improve the wrinkle elimination effect of the electrode during rolling, thereby improving the quality of the electrode. The coating machine utilizes the electrode calendering apparatus provided in this application.

[0005] In a first aspect, the electrode calendering apparatus according to an embodiment of the present invention includes a swing mechanism disposed in the electrode calendering conveying area and an extension mechanism for the tab area of ​​the calendered electrode. The swing mechanism includes a sensor, a first swing roller and a second swing roller disposed along the electrode conveying area. The sensor is electrically connected to the first swing roller and the second swing roller. The electrode can pass around the first swing roller and the second swing roller. The first swing roller and the second swing roller can swing to displace in the vertical direction. The sensor can obtain the swing amplitude of the first swing roller and the second swing roller to adjust the conveying speed or the calendering speed of the electrode.

[0006] The electrode calendering apparatus according to the present invention has at least the following beneficial effects: When the electrode in the waiting tab area passes through the electrode calendering conveying area, if there is a difference between the calendering speed and the actual conveying speed during the calendering conveying process, tension fluctuations will occur in the electrode segment near the first swing roller or the second swing roller. At this time, the first swing roller or the second swing roller will swing along with the electrode segment due to the change in tension of the electrode segment. At this time, the sensor monitors and obtains the amplitude of the swing of the first swing roller or the second swing roller, and then feeds back the information to the conveying device or the extension mechanism used to convey the electrode. The conveying device adjusts the conveying speed according to the information, or the extension mechanism adjusts the calendering speed according to the information, so that the electrode can always maintain stable tension when calendering the tab area, effectively eliminating wrinkles and unevenness in the tab area, enhancing the bonding force between the active material and the current collector, and improving the battery cycle life and safety.

[0007] In other words, it can be understood that during electrode conveying, the sensors of the oscillating mechanism monitor the oscillation amplitude of the first and second oscillating rollers to obtain information on changes in electrode tension. This information is then fed back to the control system to adjust the conveying speed, achieving dynamic speed compensation and ensuring stable tension. Real-time monitoring of electrode conveying tension is achieved through the vertical movement of the first or second oscillating roller of the oscillating mechanism. The sensors detect the oscillation amplitude of the rollers to form a closed-loop control, automatically adjusting the conveying speed. This solves the problem of electrode wrinkling or breakage caused by tension fluctuations in traditional equipment, improving the yield rate.

[0008] According to the electrode calendering apparatus of this utility model embodiment, the swing mechanism further includes a mounting bracket. The middle part of the mounting bracket is mounted on the frame via a connecting shaft. The connecting shaft is rotatably connected to the frame or the mounting bracket is rotatably connected to the connecting shaft. The two ends of the first swing roller and the second swing roller are respectively rotatably connected to the mounting bracket. A sensor is mounted on the connecting shaft to obtain the swing amplitude of the mounting bracket, thereby obtaining the swing amplitude of the first swing roller and the second swing roller.

[0009] According to the electrode calendering apparatus of this utility model embodiment, the stretching mechanism is located between the first swing roller and the second swing roller. The stretching mechanism includes stretching rollers, and the two stretching rollers are arranged at intervals in the vertical direction, so that the electrode can pass between the two stretching rollers.

[0010] According to the electrode calendering apparatus of this utility model embodiment, the width of the stretching roller is the same as the width of the electrode sheet.

[0011] According to the electrode calendering apparatus of this utility model embodiment, the stretching mechanism further includes a driving member for driving the stretching roller to rotate. The driving member is electrically connected to the sensor, and the driving member can adjust the calendering speed of the electrode according to the amplitude information of the swing of the first swing roller and the second swing roller obtained by the sensor.

[0012] According to the electrode rolling apparatus of this utility model embodiment, the driving member can increase the rotation speed of the stretching roller based on the amplitude information when the sensor detects that the first swing roller swings downward and the second swing roller swings upward, so as to increase the rolling speed of the electrode.

[0013] and / or;

[0014] The drive unit can reduce the rotational speed of the stretching roller to reduce the rolling speed of the electrode sheet based on the amplitude information when the sensor detects that the first oscillating roller is swinging upward and the second oscillating roller is swinging downward.

[0015] According to the electrode calendering apparatus of this utility model embodiment, the stretching mechanism further includes guide rollers. Guide rollers are provided between the first swing roller and the stretching roller, and between the second swing roller and the stretching roller. The first swing roller and the second swing roller abut against the front side of the electrode, and the guide roller abuts against the back side of the electrode to restrict the travel path of the electrode.

[0016] According to the electrode calendering apparatus of this utility model embodiment, a calendering part is provided on the outer circumferential wall of the guide roller, the calendering part can abut against the tab area of ​​the electrode sheet, and the width of the calendering part is the same as the width of the tab area.

[0017] According to the embodiment of the present utility model, the electrode rolling apparatus includes a rolling section located on one or both of the first and second swing rollers. The rolling section is disposed outside the first or second swing roller and is used to roll the tab area of ​​the electrode sheet.

[0018] Alternatively; the stretching mechanism includes a calendering section and an stretching roller located on one or both of the first and second sway rollers. The calendering section is located outside the first or second sway roller, and the stretching roller is located on one side of the calendering section. The electrode sheet can pass between the stretching roller and the calendering section. The stretching roller and the calendering section respectively calender the tab areas on both sides of the electrode sheet.

[0019] According to the electrode calendering apparatus of this utility model embodiment, the calendering part is a calendering ring sleeved on the outside of the first swing roller or the second swing roller, and the calendering ring is an adhesive layer;

[0020] The calendering ring is detachably connected to the first oscillating roller and / or the second oscillating roller, or the calendering ring is an integral structure with the first oscillating roller and / or the second oscillating roller; the width of the calendering ring is the same as the width of the tab area.

[0021] Secondly, the coating machine according to the embodiments of the present invention utilizes the aforementioned electrode calendering device.

[0022] The coating machine according to the present invention has at least the following beneficial effects: When the electrode sheet waiting to be calendered passes through the electrode sheet calendering and conveying area, if there is a difference between the calendering speed and the actual conveying speed during the calendering and conveying process, tension fluctuations will occur in the electrode segment near the first swing roller or the second swing roller. At this time, the first swing roller or the second swing roller will swing along with the electrode segment due to the change in tension of the electrode segment. At this time, the sensor monitors and obtains the amplitude of the swing of the first swing roller or the second swing roller, and then feeds back the information to the conveying device or the extension mechanism used to convey the electrode sheet. The conveying device adjusts the conveying speed according to the information, or the extension mechanism adjusts the calendering speed according to the information, so that the electrode sheet can always maintain stable tension when calendering the electrode sheet in the electrode sheet area, effectively eliminating wrinkles and unevenness in the electrode sheet area, enhancing the bonding force between the active material and the current collector, and improving the battery cycle life and safety.

[0023] In other words, it can be understood that during electrode conveying, the sensors of the oscillating mechanism monitor the oscillation amplitude of the first and second oscillating rollers to obtain information on changes in electrode tension. This information is then fed back to the control system to adjust the conveying speed, achieving dynamic speed compensation and ensuring stable tension. Real-time monitoring of electrode conveying tension is achieved through the vertical movement of the first or second oscillating roller of the oscillating mechanism. The sensors detect the oscillation amplitude of the rollers to form a closed-loop control, automatically adjusting the conveying speed. This solves the problem of electrode wrinkling or breakage caused by tension fluctuations in traditional equipment, improving the yield rate.

[0024] 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

[0025] 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:

[0026] Figure 1 This is a schematic diagram of the structure of the first embodiment of the electrode calendering apparatus of this utility model;

[0027] Figure 2 This is a front view of the electrode rolling apparatus according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the third embodiment of the electrode rolling apparatus of this utility model;

[0029] Figure 4 This is a cross-sectional view of the structure of the second embodiment of the first swing roller of this utility model;

[0030] Figure 5 This is a cross-sectional view of the electrode structure.

[0031] Explanation of reference numerals in the attached figures:

[0032] First swing roller 100;

[0033] Second swing roller 200;

[0034] Sensor 300;

[0035] Mounting bracket 400;

[0036] Connecting shaft 500;

[0037] 600 stretching roller;

[0038] Guide roller 700;

[0039] 800 mm in the rolling mill section;

[0040] Electrode 900; Coating area 910; Tab area 920. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] This utility model embodiment provides a coating machine, wherein the coating machine is equipped with an electrode calendering device. Specifically, the electrode calendering device is disposed between the coating device and the slitting device of the coating machine, and utilizes the viscosity of the coating slurry when it is not completely dry to improve the uniformity of the tab region 920.

[0046] Specifically, such as Figure 5 As shown, electrode 900 includes a coating area 910 and a tab area 920.

[0047] Furthermore, the coating machine can be equipped with a detection device to measure the thickness and width of the tab area 920 before calendering online, so as to adjust the stretching pressure on the tab area 920 and select the appropriate calendering mechanism.

[0048] Furthermore, the coating machine can also be equipped with a detection device to measure the thickness and width of the tab area 920 after calendering online, so as to realize automated detection of whether the calendered electrode sheet 900 meets the product quality requirements without manual inspection, thereby improving production efficiency.

[0049] Among them, reference Figure 1 Regarding the electrode calendering apparatus provided in this application, it includes a swing mechanism disposed in the calendering and conveying area of ​​the electrode 900. The swing mechanism includes a sensor 300, a first swing roller 100 and a second swing roller 200 disposed along the electrode 900. The sensor 300 is electrically connected to the first swing roller 100 and the second swing roller 200. The electrode 900 can move around the first swing roller 100 and the second swing roller 200 in the vertical direction. The sensor 300 can obtain the swing amplitude of the first swing roller 100 and the second swing roller 200 to adjust the conveying speed of the electrode 900.

[0050] Specifically, such as Figure 1 and Figure 2 As shown, the electrode calendering apparatus includes an extension mechanism and a swing mechanism. The swing mechanism consists of a mounting bracket 400, a connecting shaft 500, a first swing roller 100, a second swing roller 200, and a sensor 300. Specifically, the connecting shaft 500 is mounted on the mounting bracket 400 and is rotatably connected to the frame of the coating machine. The first swing roller 100 and the second swing roller 200 are respectively located at both ends of the mounting bracket 400 and are rotatably connected to the mounting bracket 400. The electrode 900 can pass through the first swing roller 100 and the second swing roller 200.

[0051] Optionally, the sensor 300 can be disposed on the connecting shaft 500, or both the first swing roller 100 and the second swing roller 200 can be provided with the sensor 300. Optionally, the sensor 300 can be an encoder or a displacement sensor. The sensor 300 transmits the swing signals of the first swing roller 100 and the second swing roller 200 to the control system, and the control system adjusts the speed of the drive motor to achieve dynamic speed compensation.

[0052] According to some embodiments of this application, such as Figure 1 As shown, this application provides a first embodiment of an extension mechanism. Specifically, the extension mechanism is located between the first swing roller 100 and the second swing roller 200. The extension mechanism includes an extension roller 600, with two extension rollers 600 forming a group. The two extension rollers 600 are spaced apart in the vertical direction, and the electrode 900 can pass between the two extension rollers 600.

[0053] It is understood that the first swing roller 100 and the second swing roller 200 form a lever-type swing mechanism. When the sensor 300 detects that the first swing roller 100 swings downward and the second swing roller 200 swings upward, the sensor 300 obtains the swing amplitude of the first swing roller 100 and the second swing roller 200 and feeds it back to the drive (not shown in the figure). The drive (not shown in the figure) can increase the rotation speed of the stretching roller 600, so as to restore the electrode 900 between the first swing roller 100 and the stretching mechanism to a sufficient tension state, so as to avoid insufficient tension between the second swing roller 200 and the stretching mechanism, which would affect the stretching quality of the tab area 920. At the same time, it restores the first swing roller 100 and the second swing roller 200 to a balanced state to ensure the stretching quality of the tab area 920.

[0054] Alternatively, when sensor 300 detects that the first swing roller 100 swings upward and the second swing roller 200 swings downward, sensor 300 acquires the swing amplitude of the first swing roller 100 and the second swing roller 200 and feeds it back to the drive (not shown). The drive (not shown) can reduce the rotational speed of the stretching roller 600, thereby restoring sufficient tension to the electrode 900 between the second swing roller 200 and the stretching mechanism, so as to avoid insufficient tension between the second swing roller 200 and the stretching mechanism, which would affect the stretching quality of the tab area 920.

[0055] By using the oscillation amplitude of the oscillating roller to adjust the rotation speed of the stretching roller 600 in real time, dynamic tension adjustment and closed-loop control can be formed in the calendering tab area 920, automatically adjusting the conveying speed, solving the problem of electrode 900 wrinkles or breakage caused by tension fluctuations in traditional equipment, and improving the yield rate.

[0056] Of course, in practical applications, the number of 600 sets of stretching rollers can be set according to actual production needs.

[0057] Furthermore, the stretching mechanism can also be equipped with an adjustment component, on which the stretching roller 600 is mounted. The adjustment component can be used to adjust the distance between the two stretching rollers 600 to accommodate tab areas 920 of different thicknesses.

[0058] Furthermore, as an improvement to the design, a guide roller 700 is also provided. Specifically, such as... Figure 1 As shown, two guide rollers 700 are respectively disposed on both sides of the stretching roller group 600. After the electrode sheet 900 is output from the first swing roller 100, it enters the stretching roller group 600 through the first guide roller 700 for calendering. After the tab area 920 completes the calendering process, the electrode sheet 900 is conveyed to the second guide roller 700, and then conveyed to the second swing roller 200 through the second guide roller 700. Through the guide roller 700, the electrode sheet 900 is guided to accurately enter the stretching roller 600 for calendering, preventing deviation and ensuring the stretching quality of the tab area 920.

[0059] Specifically, the first swing roller 100 and the second swing roller 200 abut against the front side of the electrode 900, and the guide roller 700 abuts against the back side of the electrode 900 to restrict the travel path of the electrode 900.

[0060] Optionally, a calendering portion 800 is provided on the outer circumferential wall of the guide roller 700. The calendering portion 800 can abut against the tab area 920 of the electrode sheet 900, and the width of the calendering portion 800 is the same as the width of the tab area 920. By providing a calendering portion 800 on the guide roller 700 with the same width as the tab area 920, the electrode sheet 900 can be positioned and conveyed during the conveying process, preventing the electrode sheet 900 from shifting during the conveying process.

[0061] Preferably, the calendered portion 800 may be a rubber ring sleeved on the outside of the guide roller 700 or an annular calendered portion 800 formed by externally wrapping rubber tape on the outside of the guide roller 700, so as to avoid scratching the tab area 920 during the conveying process.

[0062] According to some embodiments of this application, as shown in the figures, this application provides a second embodiment regarding the stretching mechanism. Specifically, either the first oscillating roller 100 or the second oscillating roller 200 is provided with a calendering portion 800, or both the first oscillating roller 100 and the second oscillating roller 200 are provided with calendering portions 800. When the electrode sheet 900 is wound around the first oscillating roller 100 or the second oscillating roller 200, the tab region 920 can be stretched simultaneously.

[0063] As shown in the figure, the calendering section 800 is a calendering ring located outside the swing roller.

[0064] Optionally, the calendering ring and the swing roller are fitted together, and the calendering ring and the swing roller are detachable, so that the user can replace the calendering ring after it wears out.

[0065] Similarly, the calendering ring can be a rubber ring fitted outside the guide roller 700 or an annular calendering portion 800 formed by externally wrapping rubber tape outside the guide roller 700, so as to avoid scratching the tab area 920 during conveying.

[0066] Furthermore, because the rubber ring is elastic, it can adapt to the slight fluctuations on the surface of the electrode 900, ensuring that the tab area 920 is always uniformly pressed, avoiding excessive local pressure or poor contact that may be caused by traditional rigid protrusions. At the same time, the contact surface between the rubber ring and the electrode 900 is flexible, which can avoid scratches or indentations on the coating area caused by rigid protrusions, avoid damage to the electrode 900, and adapt to the slight fluctuations on the surface of the electrode 900, ensuring that the tab area 920 is always uniformly pressed, avoiding excessive local pressure or poor contact that may be caused by traditional rigid protrusions.

[0067] Additionally, it should be noted that the width of the calendering section 800 is the same as the width of the tab region 920 to avoid the calendering section 800 being too wide and squeezing the coating region 910, or too narrow and failing to guarantee the stretching quality of the tab region 920.

[0068] Or, alternatively, such as Figure 4 As shown, the calendering section 800 is a protruding portion on the outer circumferential wall of the oscillating roller, and the calendering section 800 and the oscillating roller are of the same material and integral structure. The integral manufacturing of the calendering section 800 and the oscillating roller ensures stretching stability and guarantees the processing quality of the tab area 920 of the electrode sheet 900. Optionally, an adhesive coating or adhesive tape can be added to the outer wall of the calendering section 800 to prevent scratching of the tab area 920 during transport.

[0069] According to some embodiments of this application, this application provides a third embodiment regarding the stretching mechanism. Specifically, as shown in the figure, either the first oscillating roller 100 or the second oscillating roller 200 is provided with a calendering portion 800, or both the first oscillating roller 100 and the second oscillating roller 200 are provided with calendering portions 800. Further, a stretching roller 600 is also provided on the opposite side of the electrode sheet 900, and the calendering portion 800 of the oscillating roller and the stretching roller 600 together constitute the stretching mechanism for calendering the tab region 920.

[0070] Alternatively, the stretching roller 600 may have the same structure as the swing roller.

[0071] That is, such as Figure 3 As shown, two first swing rollers 100 can be set as a group. The two first swing rollers 100 are respectively located on both sides of the electrode 900. After the electrode 900 passes around the first swing roller 100, it can pass through the gap between the two first swing rollers 100 and be conveyed to the second swing roller 200.

[0072] Furthermore, two second swing rollers 200 can be set as a group, and their installation method is the same as that of the first swing roller 100, which will not be described in detail here. By setting two extension mechanisms, the rolling efficiency of the tab region 920 can be improved.

[0073] Furthermore, the mounting bracket 400 is provided with an adjustment structure for adjusting the gap between the swing rollers, so as to accommodate electrode sheets 900 of different thicknesses.

[0074] It should be noted that in the second and third embodiments of the extension mechanism, when the swing roller swings, the extension roller 600 on the same side as the swing roller also swings, and the rotation speed of the swing roller is the same as that of the extension roller 600 on the same side, so as to avoid damage to the tab area 920 due to speed difference.

[0075] The working principle of the electrode calendering device provided in this application is as follows: When the electrode 900 waiting to be calendered in the tab area 920 passes through the electrode 900 calendering and conveying area, if there is a difference between the calendering speed and the actual conveying speed during the calendering and conveying process, the section of the electrode 900 near the first swing roller 100 or near the second swing roller 200 will experience tension fluctuations. At this time, the first swing roller 100 or the second swing roller 200 will swing along with the change in tension of the section of the electrode 900. At this time, the sensor 300 monitors and obtains the amplitude of the swing of the first swing roller 100 or the second swing roller 200, and feeds back the information to the conveying device or the extension mechanism used to convey the electrode 900. The conveying device adjusts the conveying speed according to the information, or the extension mechanism adjusts the calendering speed according to the information, so that the electrode 900 can always maintain stable tension when calendering the tab area 920, effectively eliminating wrinkles and unevenness in the tab area 920, enhancing the bonding force between the active material and the current collector, and improving the battery cycle life and safety.

[0076] In other words, it can be understood that during the conveying of electrode 900, the sensor 300 of the oscillating mechanism monitors the oscillation amplitude of the first oscillating roller 100 and the second oscillating roller 200 to obtain information on the tension change of electrode 900. This information is then fed back to the control system to adjust the conveying speed, achieving dynamic speed compensation and thus ensuring tension stability. Real-time monitoring of the conveying tension of electrode 900 is achieved through the vertical movement of the first oscillating roller 100 or the second oscillating roller 200. The sensor 300 detects the oscillation amplitude of the rollers to form a closed-loop control, automatically adjusting the conveying speed. This solves the problem of electrode 900 wrinkles or breakage caused by tension fluctuations in traditional equipment, improving the yield rate.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. 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.

[0078] 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. An electrode calendering apparatus, comprising a oscillating mechanism disposed in the electrode (900) calendering conveying area and an extension mechanism for the tab region (920) of the calendered electrode (900), characterized in that: The oscillation mechanism includes a sensor (300), a first oscillation roller (100) and a second oscillation roller (200) disposed along the electrode sheet (900). The sensor (300) is electrically connected to the first oscillation roller (100) and the second oscillation roller (200). The electrode sheet (900) can pass around the first oscillation roller (100) and the second oscillation roller (200). The first oscillation roller (100) and the second oscillation roller (200) can oscillate to displace in the vertical direction. The sensor (300) can obtain the amplitude of the oscillation of the first oscillation roller (100) and the second oscillation roller (200) to adjust the conveying speed of the electrode sheet (900) or the rolling speed of the electrode sheet (900).

2. The electrode rolling apparatus according to claim 1, characterized in that, The swing mechanism further includes a mounting bracket (400), the middle part of which is mounted on the frame via a connecting shaft (500). The connecting shaft (500) is rotatably connected to the frame, or the mounting bracket (400) is rotatably connected to the connecting shaft (500). The two ends of the first swing roller (100) and the second swing roller (200) are respectively rotatably connected to the mounting bracket (400). The sensor (300) is mounted on the connecting shaft (500) to obtain the swing amplitude of the mounting bracket (400), and thus obtain the swing amplitude of the first swing roller (100) and the second swing roller (200).

3. The electrode rolling apparatus according to claim 1, characterized in that, The extension mechanism is located between the first swing roller (100) and the second swing roller (200). The extension mechanism includes an extension roller (600). The two extension rollers (600) are arranged at intervals in the vertical direction. The electrode (900) can pass between the two extension rollers (600). The extension roller (600) can abut against the tab area (920) of the electrode (900).

4. The electrode rolling apparatus according to claim 3, characterized in that, The width of the stretching roller (600) is the same as the width of the electrode (900).

5. The electrode rolling apparatus according to claim 3, characterized in that, The stretching mechanism also includes a drive member for rotating the stretching roller (600). The drive member is electrically connected to the sensor (300). The drive member can adjust the rolling speed of the electrode sheet (900) according to the amplitude information of the swing of the first swing roller (100) and the second swing roller (200) obtained by the sensor (300).

6. The electrode rolling apparatus according to claim 5, characterized in that, The drive unit can increase the rotational speed of the stretching roller (600) to increase the rolling speed of the electrode sheet (900) based on amplitude information when the sensor (300) detects that the first swing roller (100) swings downward and the second swing roller (200) swings upward. and / or; The drive unit can reduce the rotational speed of the stretching roller (600) to reduce the rolling speed of the electrode sheet (900) based on amplitude information when the sensor (300) detects that the first oscillating roller (100) swings upward and the second oscillating roller (200) swings downward.

7. The electrode rolling apparatus according to claim 3, characterized in that, The extension mechanism further includes guide rollers (700). Guide rollers (700) are provided between the first swing roller (100) and the extension roller (600) and between the second swing roller (200) and the extension roller (600). The first swing roller (100) and the second swing roller (200) abut against the front side of the electrode (900), and the guide rollers (700) abut against the back side of the electrode (900) to restrict the travel path of the electrode (900).

8. The electrode rolling apparatus according to claim 7, characterized in that, The guide roller (700) has a calendering section (800) on its outer circumferential wall. The calendering section (800) can abut against the tab area (920) of the electrode sheet (900). The width of the calendering section (800) is the same as the width of the tab area (920).

9. The electrode rolling apparatus according to claim 1, characterized in that, The stretching mechanism includes a rolling portion (800) located on one or both of the first oscillating roller (100) and the second oscillating roller (200), the rolling portion (800) being disposed outside the first oscillating roller (100) or the second oscillating roller (200), and the rolling portion (800) being used to roll the tab region (920) of the electrode sheet (900). or; The stretching mechanism includes a rolling section (800) and a stretching roller (600) located on one or both of the first oscillating roller (100) and the second oscillating roller (200). The rolling section (800) is disposed outside the first oscillating roller (100) or the second oscillating roller (200). The stretching roller (600) is located on one side of the rolling section (800). The electrode sheet (900) can pass between the stretching roller (600) and the rolling section (800). The stretching roller (600) and the rolling section (800) respectively roll the tab areas (920) on both sides of the electrode sheet (900).

10. The electrode rolling apparatus according to claim 9, characterized in that, The calendering section (800) is a calendering ring sleeved on the outside of the first oscillating roller (100) or the second oscillating roller (200), and the calendering ring is an adhesive layer; The calendering ring is detachably connected to the first oscillating roller (100) and / or the second oscillating roller (200), or the calendering ring is an integral structure with the first oscillating roller (100) and / or the second oscillating roller (200); The width of the calendering ring is the same as the width of the tab region (920).

11. A coating machine, characterized in that, Includes the electrode rolling apparatus according to any one of claims 1 to 10.

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