Cutting mechanism of packaging film for secondary battery and secondary battery film coating device

Abstract

The utility model provides a cutting mechanism of a packaging film for a secondary battery and a secondary battery film coating device, and relates to the technical field of batteries. The utility model provides a cutting mechanism of a packaging film for a secondary battery. The cutting mechanism comprises a support, a first mounting part, a second mounting part and a cutter. Wherein the first mounting piece is in sliding connection with the support in the first direction; the second mounting piece is rotationally connected with the first mounting piece, and the relative rotating axis is parallel to the first direction; the cutter is fixedly connected with the second installation part, and the cutting direction of the cutter intersects with the first direction. The cutting mechanism for the packaging film for the secondary battery is used for cutting the packaging film for the secondary battery, and the efficiency of adjusting the position and posture of the cutter can be improved.

Description

Technical Field

[0001] The present application relates to the technical field, and in particular to a cutting mechanism for a packaging film for a secondary battery and a secondary battery packaging device. Background Art

[0002] During secondary battery production, the outer surface of the electrode is covered with a protective film. After the film is applied, it must be cut to separate the portion covering the electrode from the rest of the film. To improve cutting efficiency, the position of the cutter relative to the film often needs to be adjusted. However, in the prior art, this adjustment is inefficient. Summary of the Invention

[0003] The present application provides a cutting mechanism for a packaging film for a secondary battery and a secondary battery packaging device, which can improve the efficiency of adjusting the position of the cutter.

[0004] In a first aspect, the present application provides a cutting mechanism for secondary battery packaging film, comprising a support, a first mounting member, a second mounting member, and a cutter. The first mounting member is slidably connected to the support along a first direction; the second mounting member is rotatably connected to the first mounting member, with the axis of relative rotation parallel to the first direction; and the cutter is fixedly connected to the second mounting member, with the cutting direction of the cutter intersecting the first direction.

[0005] In some implementations of the present application, the cutting mechanism for the packaging film for secondary batteries further includes a first gear and a rack, the rack extending in a first direction and fixedly connected to the first mounting member, the first gear rotatably connected to the support, and the first gear meshes with the rack; and / or, the cutting mechanism for the packaging film for secondary batteries further includes a screw, the axial direction of the screw is the first direction; the screw is rotatably connected to the support, and the screw is spirally engaged with the first mounting member.

[0006] In some implementations of the present application, the cutting mechanism for the secondary battery packaging film further includes a first operating handle, which is rotatably connected to the support and transmission-connected to at least one of the first gear and the screw to drive the first mounting member to slide relative to the support.

[0007] In some implementations of the present application, a first scale is provided on the support, and the first scale is arranged circumferentially along the axis of rotation of the first operating handle relative to the support.

[0008] In some implementations of the present application, the cutting mechanism for the packaging film for secondary batteries also includes a second gear and a third gear, the second gear is fixedly connected to the second mounting member, the axis of the second gear is the same as the axis of rotation of the second mounting member relative to the first mounting member, the third gear is rotatably connected to the support, the axial direction of the third gear is the same as the axial direction of the second gear, and the third gear is meshed with the second gear; and / or, the cutting mechanism for the packaging film for secondary batteries also includes a connecting shaft and a connecting sleeve, the connecting shaft is splined with the connecting sleeve, and the axis of the spline cooperation is the same as the axis of rotation of the second mounting member relative to the first mounting member; of the connecting shaft and the connecting sleeve, one is fixedly connected to the second mounting member, and the other is rotatably connected to the support, and the relative rotation is the same as the axis of the spline cooperation.

[0009] In some implementations of the present application, the cutting mechanism for the packaging film for secondary batteries also includes a second operating handle, which is rotatably connected to the support, and the second operating handle is transmission-connected to the third gear, or is transmission-connected to the other of the connecting shaft and the connecting sleeve to drive the second mounting member to rotate relative to the first mounting member.

[0010] In some implementations of the present application, the cutting mechanism of the packaging film for secondary batteries also includes a fourth gear, which is rotatably connected to the support, the axial direction of the fourth gear intersects with the axial direction of the third gear, the fourth gear is transmission-connected to the third gear, and the second operating handle is fixedly connected to the fourth gear.

[0011] In some implementations of the present application, a second scale is provided on the support, and the second scale is arranged circumferentially along the axis of rotation of the second operating handle relative to the support.

[0012] In some implementations of the present application, the cutting mechanism for the packaging film for secondary batteries also includes a base and a driving mechanism. The driving mechanism is arranged on the base, and the output end of the driving mechanism is transmission-connected to the support to drive the support to move relative to the base along a second direction, where the second direction intersects with the first direction.

[0013] In a second aspect, the present application provides a secondary battery film packaging device, which includes a cutting mechanism for the secondary battery packaging film provided in the first aspect of the present application.

[0014] The cutting mechanism for secondary battery packaging film provided in the present application has a cutter mounted on a support via a first mounting member and a second mounting member, the first mounting member being slidably connected to the support along a first direction; the second mounting member being rotatably connected to the first mounting member. When the position of the cutter needs to be adjusted, it is only necessary to slide the first mounting member relative to the support, or to rotate the second mounting member relative to the first mounting member. Adjustment is more convenient and efficient.

[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 This is one of the structural schematic diagrams of a cutting mechanism for a secondary battery packaging film in some embodiments of the present application;

[0018] Figure 2 This is a second structural schematic diagram of a cutting mechanism for a secondary battery packaging film in some embodiments of the present application;

[0019] Figure 3 This is one of the structural diagrams of the cooperation between the first gear, the rack, the second gear and the third gear in some embodiments of the present application;

[0020] Figure 4 This is the second structural diagram of the cooperation among the first gear, rack, second gear and third gear in some embodiments of the present application.

[0021] Reference numerals:

[0022] 1-base; 2-driving mechanism; 3-cutting mechanism; 31-support; 311-mounting cavity; 32-cutter; 33-first gear; 34-rack; 35-first operating handle; 36-second gear; 37-third gear; 38-second operating handle; x-first direction; y-second direction. DETAILED DESCRIPTION

[0023] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and are not to be construed as limiting the present invention. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of this application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0025] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. In the description of the present invention, unless otherwise specified, "at least two" means two or more. Furthermore, the term "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "left", "right", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0028] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary 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 any one or at least two embodiments or examples.

[0029] During secondary battery production, the outer surface of the electrode is covered with a protective film. After the film is applied, it must be cut to separate the portion covering the electrode from the rest of the film. To improve cutting efficiency, the position of the cutter relative to the film often needs to be adjusted. However, in the prior art, this adjustment is inefficient.

[0030] The following is an analysis of the reasons for the low efficiency of cutter posture adjustment in related technologies. The analysis process and conclusions are part of the creativity of this application.

[0031] In the related art, the cutter is mounted on the cutter holder via screws. The cutter holder is provided with multiple mounting holes, and the screws are respectively installed in the multiple mounting holes to adjust the position of the cutter relative to the cutter holder. During the process of adjusting the position of the cutter, the screws need to be repeatedly removed, resulting in low efficiency.

[0032] The present application provides a secondary battery film coating device for applying a packaging film to the outer surface of a pole piece. The packaging film in the embodiments of the present application has the same meaning as commonly understood by those skilled in the art. It can protect the pole piece and also insulate it from the secondary battery casing. Generally, the casing forms an energy storage cavity, and the pole piece is disposed within the energy storage cavity. The packaging film can separate the pole piece from the inner surface of the casing, thereby insulating the pole piece from the casing. Exemplarily, the packaging film can be made of a material such as polytetrafluoroethylene.

[0033] The secondary battery in the embodiments of the present application has the same meaning as commonly understood by those skilled in the art of the present application, and refers to a battery that can be recharged after the battery is discharged to activate the active material and continue to be used. The secondary battery can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited to this. In addition, according to the packaging method classification, the secondary battery in the embodiments of the present application can be a cylindrical battery or a square-shell battery, etc., and the embodiments of the present application are not limited to this.

[0034] Please refer to Figure 1 and Figure 2 The secondary battery film coating device in this application includes a cutting mechanism 3 for a secondary battery film coating. After the outer surface of the electrode is coated with the coating film, the cutting mechanism 3 cuts the coating film to separate the portion of the coating film coated on the outer surface of the electrode from the rest of the coating film.

[0035] Please refer to Figure 1 and Figure 2 The cutting mechanism 3 for secondary battery packaging film provided in this application includes a support 31, a first mounting member, a second mounting member, and a cutter 32. The first mounting member is slidably connected to the support 31 along a first direction x; the second mounting member is rotatably connected to the first mounting member, with the axis of relative rotation parallel to the first direction x; and the cutter 32 is fixedly connected to the second mounting member, with the cutting direction of the cutter 32 intersecting the first direction x.

[0036] Please refer to Figure 1 and Figure 2The cutting mechanism 3 for secondary battery packaging film provided in the present application has a cutter 32 mounted on a support 31 through a first mounting member and a second mounting member. The first mounting member is slidably connected to the support 31 along a first direction x; the second mounting member is rotatably connected to the first mounting member. When the position of the cutter 32 needs to be adjusted, it is only necessary to slide the first mounting member relative to the support 31 or rotate the second mounting member relative to the first mounting member. The adjustment is more convenient and efficient.

[0037] Please refer to Figure 1 and Figure 2 In the embodiments of the present application, the sliding connection between the first mounting member and the support 31 can be implemented in various forms. For example, in some embodiments of the present application, a slide rail is formed on the support 31, and the slide rail extends along the first direction x. The first mounting member has a slider, and the slider and the slide rail slide along the first direction x to achieve a sliding connection between the first mounting member and the support 31. In some embodiments of the present application, a sliding hole is formed on the support 31, and the depth direction of the sliding hole is the first direction x. The first mounting member has a sliding post, and the sliding post extends in the first direction x. The sliding post slides in cooperation with the sliding hole to achieve a sliding connection between the first mounting member and the support 31.

[0038] Please refer to Figure 1 and Figure 2 In the embodiment of the present application, the cutting direction of the cutter 32, that is, the direction of the blade of the cutter 32. In some embodiments of the present application, the cutting direction of the cutter 32 is perpendicular to the first direction x, that is, the blade of the cutter 32 extends along the first direction x, which makes the cutting mechanism 3 occupy less space in the direction perpendicular to the first direction x.

[0039] Please refer to Figure 1 and Figure 2 Generally, the thickness direction of the packaging film is the first direction x. In this way, by sliding the first mounting member relative to the support 31, the blade of the cutter 32 can be more conveniently aligned with the packaging film, which is beneficial to improving the cutting effect.

[0040] Please refer to Figure 1 and Figure 2 In the embodiment of the present application, the first direction x can be implemented in various forms. For example, it can be a vertical direction or a horizontal direction, etc. The embodiment of the present application does not limit this.

[0041] Please refer to Figure 1 and Figure 2In some embodiments of the present application, a cutting mechanism 3 for a secondary battery packaging film further includes a base 1 and a drive mechanism 2. The drive mechanism 2 is disposed on the base 1, and the output end of the drive mechanism 2 is in transmission connection with the support 31 to drive the support 31 to move relative to the base 1 in a second direction y, where the second direction y intersects the first direction x. With this structural form, the cutter 32 can be rotated relative to the base 1 by rotating the second mounting member relative to the first mounting member, making adjustment of the position of the cutter 32 relative to the base 1 more convenient and more efficient. During the adjustment process, the cutting direction of the cutter 32 can be easily aligned with the second direction y. In this way, the drive mechanism 2 can drive the cutter 32 to move in the cutting direction to cut the packaging film, which is beneficial for improving the cutting effect and reducing burrs on the cut edges.

[0042] In some embodiments of the present application, the second direction y is perpendicular to the first direction. In this way, by rotating the second mounting member relative to the first mounting member, the cutting direction of the cutter 32 can be easily made the same as the second direction y, which is conducive to making the adjustment process more convenient.

[0043] Please refer to Figure 1 and Figure 2 In the embodiment of the present application, the driving member can be implemented in various forms. For example, it can be a cylinder or a linear motor, and the cylinder can be a rodless cylinder or a rod cylinder.

[0044] Please refer to Figure 1 and Figure 2 Generally, the base 1 is fixed relative to the packaging film, and the driving mechanism 2 drives the cutter 32 to move relative to the packaging film to cut the packaging film.

[0045] Please refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments of the present application, the cutting mechanism 3 for secondary battery packaging film further includes a first gear 33 and a rack 34. The rack 34 extends in a first direction x and is fixedly connected to the first mounting member. The first gear 33 is rotatably connected to the support 31 and meshes with the rack 34. With this structure, the rotation of the first gear 33 relative to the base 1 drives the sliding of the first mounting member relative to the base 1, thereby adjusting the position of the cutter 32 relative to the packaging film. This adjustment can be performed step by step, allowing the relative position of the cutter 32 and the packaging film to be precisely controlled.

[0046] In the present application, refer to Figure 3 and Figure 4 The rack 34 moves relative to the base 1 along the first direction x driven by the first gear 33, so that the rack 34 has a first position and a second position relative to the base 1. The rack 34 is in the first position relative to the base 1. Figure 3 , in the second position, you can refer to Figure 4 .

[0047] Please refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments of the present application, the cutting mechanism 3 for secondary battery packaging film further includes a screw, the axial direction of which is in the first direction x; the screw is rotatably connected to the support 31 and is screw-engaged with the first mounting member. With this structure, the rotation of the screw relative to the base 1 drives the first mounting member to slide relative to the base 1. The precise screw engagement allows for precise control of the relative position of the cutter 32 and the packaging film. Furthermore, the screw engagement has a self-locking function, ensuring that after adjusting the position of the cutter 32 relative to the packaging film, the cutter 32 remains securely in that position, thereby improving the cutting effect.

[0048] Please refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments of the present application, the cutting mechanism 3 for secondary battery packaging film further includes a first operating handle 35. The first operating handle 35 is rotatably connected to the support 31 and is in transmission connection with at least one of the first gear 33 and the screw to drive the first mounting member to slide relative to the support 31. With this structure, a person can control the rotation of the first gear 33 and the screw relative to the support 31 using the first operating handle 35, facilitating operation.

[0049] Please refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments of the present application, at least one of the first gear 33 and the screw rod is fixedly connected to the first operating handle 35. Such a structural form is relatively simple, easy to manufacture, and has low cost.

[0050] Please refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments of the present application, a first scale is provided on the support 31, and the first scale is arranged circumferentially along the axis of rotation of the first operating handle 35 relative to the support 31. This structure allows a person to more precisely control the rotation range of the operating handle through the first scale, so that the relative position of the cutter 32 and the packaging film can be precisely controlled.

[0051] Please refer to Figure 1 、 Figure 2 and Figure 3In some embodiments of the present application, the cutting mechanism 3 for secondary battery packaging film further includes a second gear 36 and a third gear 37. The second gear 36 is fixedly connected to the second mounting member, and its axis is aligned with the axis of rotation of the second mounting member relative to the first mounting member. The third gear 37 is rotatably connected to the support 31, and its axial direction is aligned with the axial direction of the second gear 36, meshing with the second gear 36. With this structure, the rotation of the third gear 37 relative to the base 1 drives the rotation of the second mounting member relative to the first mounting member, thereby adjusting the position of the cutter 32 relative to the packaging film. This adjustment can be achieved in stages, allowing the relative position of the cutter 32 and the packaging film to be precisely controlled.

[0052] Please refer to Figure 3 and Figure 4 In the embodiment of the present application, it can be understood that, in the embodiment of the present application, during the process of the rack 34 moving relative to the base 1 along the first direction x driven by the first gear 33, that is, during the process of the first mounting member sliding relative to the second mounting member, the second gear 36 slides axially relative to the third gear 37, and during the sliding process, the second gear 36 and the third gear 37 can always be in a meshing state.

[0053] In some embodiments of the present application, the cutting mechanism 3 for secondary battery packaging film further includes a connecting shaft and a connecting sleeve. The connecting shaft and the connecting sleeve are splined together, and the axis of the splined engagement is the same as the axis of rotation of the second mounting member relative to the first mounting member. One of the connecting shaft and the connecting sleeve is fixedly connected to the second mounting member, while the other is rotatably connected to the support 31, and the axis of relative rotation is the same as the axis of the splined engagement. With this structural form, as the first mounting member slides relative to the second mounting member, the connecting shaft and the connecting sleeve also slide relative to each other in the first direction x, and they remain engaged during this sliding process. Thus, as the other of the connecting shaft and the connecting sleeve rotates relative to the base 1, it can drive the second mounting member to rotate relative to the first mounting member, thereby adjusting the position of the cutter 32 relative to the packaging film. Furthermore, the splined engagement is relatively stable, which helps improve the reliability of the cutting mechanism 3.

[0054] Please refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments of the present application, the cutting mechanism 3 for secondary battery packaging film further includes a second operating handle 38, which is rotatably connected to the support 31 and is in transmission connection with the third gear 37. With this structure, a person can control the rotation of the third gear 37 relative to the support 31 using the second operating handle 38, facilitating operation.

[0055] Please refer to Figure 1 、 Figure 2 and Figure 3In some embodiments of the present application, the secondary battery packaging film cutting mechanism 3 further includes a second operating handle 38. The second operating handle 38 is rotatably connected to the support 31 and is in transmission connection with the other of the connecting shaft and the connecting sleeve to drive the second mounting member to rotate relative to the first mounting member. This structure allows a person to control the rotation of the other of the connecting shaft and the connecting sleeve relative to the support 31 using the second operating handle 38, facilitating operation.

[0056] Please refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments of the present application, the cutting mechanism 3 for secondary battery packaging film further includes a fourth gear, which is rotatably connected to the support 31. The axial direction of the fourth gear intersects the axial direction of the third gear 37. For example, the axial direction of the fourth gear can be perpendicular to the axial direction of the third gear 37. The fourth gear is in transmission connection with the third gear 37, and the second operating handle 38 is fixedly connected to the fourth gear. With this structure, the position of the second operating handle 38 on the support 31 can be adjusted by adjusting the axial direction of the fourth gear, allowing for greater flexibility in the position of the second operating handle 38 on the support 31.

[0057] Please refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments of the present application, a second scale is provided on the support 31, and the second scale is arranged circumferentially along the axis of rotation of the second operating handle 38 relative to the support 31. This structure allows the operator to more accurately control the rotation range of the operating handle through the second scale, so that the relative position of the cutter 32 and the packaging film can be precisely controlled.

[0058] Please refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments of the present application, a mounting cavity 311 is formed on the support 31, and the first mounting member, the second mounting member, the transmission connection structure between the first operating handle 35 and the first mounting member, such as the first gear 33 and the rack 34, and the transmission connection structure between the second operating handle 38 and the second mounting member, such as the third gear 37 and the fourth gear, can be arranged in the mounting cavity 311 to obtain protection of the support 31, which is conducive to improving the reliability of the cutting mechanism 3.

[0059] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application.

[0060] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions, and alterations may be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A cutting mechanism for a secondary battery packaging film, characterized in that: include: Support; a first mounting member, slidably connected to the support along a first direction; a second mounting member rotatably connected to the first mounting member, with an axis of relative rotation parallel to the first direction; A cutter is fixedly connected to the second mounting member, and a cutting direction of the cutter intersects with the first direction.

2. The cutting mechanism for secondary battery packaging film according to claim 1, wherein: It also includes a first gear and a rack, wherein the rack extends along the first direction and is fixedly connected to the first mounting member, the first gear is rotatably connected to the support, and the first gear is meshed with the rack; And / or, it further includes a screw rod, the axial direction of the screw rod is the first direction; the screw rod is rotatably connected to the support, and the screw rod is spirally engaged with the first mounting member.

3. The cutting mechanism for secondary battery packaging film according to claim 2, wherein: It also includes a first operating handle, which is rotatably connected to the support and transmission-connected to at least one of the first gear and the screw rod to drive the first mounting member to slide relative to the support.

4. The cutting mechanism for secondary battery packaging film according to claim 3, wherein: The support is provided with a first scale, and the first scale is arranged along the circumference of the axis of rotation of the first operating handle relative to the support.

5. The cutting mechanism for secondary battery packaging film according to claim 1, wherein: The second gear is fixedly connected to the second mounting member, the axis of the second gear is the same as the axis of rotation of the second mounting member relative to the first mounting member, the third gear is rotatably connected to the support, the axial direction of the third gear is the same as the axial direction of the second gear, and the third gear is meshed with the second gear; And / or, it also includes a connecting shaft and a connecting sleeve, the connecting shaft is spline-fitted to the connecting sleeve, and the axis of the spline fit is the same as the axis of rotation of the second mounting member relative to the first mounting member; among the connecting shaft and the connecting sleeve, one is fixedly connected to the second mounting member, and the other is rotatably connected to the support, and the axis of relative rotation is the same as the axis of the spline fit.

6. The cutting mechanism for secondary battery packaging film according to claim 5, characterized in that: It also includes a second operating handle, which is rotatably connected to the support. The second operating handle is transmission-connected to the third gear, or transmission-connected to the other of the connecting shaft and the connecting sleeve to drive the second mounting member to rotate relative to the first mounting member.

7. The cutting mechanism for secondary battery packaging film according to claim 6, wherein: It also includes a fourth gear, which is rotatably connected to the support, the axial direction of the fourth gear intersects with the axial direction of the third gear, the fourth gear is transmission-connected to the third gear, and the second operating handle is fixedly connected to the fourth gear.

8. The cutting mechanism for secondary battery packaging film according to claim 6, wherein: The support is provided with a second scale, and the second scale is arranged along the circumference of the axis of rotation of the second operating handle relative to the support.

9. The cutting mechanism for a secondary battery packaging film according to any one of claims 1 to 8, wherein: It also includes a base and a driving mechanism, wherein the driving mechanism is arranged on the base, and the output end of the driving mechanism is transmission-connected with the support to drive the support to move relative to the base along a second direction, where the second direction intersects with the first direction.

10. A secondary battery coating device, characterized in that: A cutting mechanism comprising the secondary battery packaging film according to any one of claims 1 to 9.

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