Film folding mechanism and film wrapping device

Abstract

The present invention discloses a film wrapping and folding mechanism and a film wrapping device. The film wrapping and folding mechanism includes: a translation assembly; a folding knife assembly, wherein the folding knife assembly and the translation assembly are fixedly connected, and the translation assembly is used to drive the folding knife assembly to move in a first direction, wherein the folding knife assembly has an initial position and a folding position. When the folding knife assembly is in the initial position, it is tilted relative to the first direction, and when it is in the folding position, it is parallel to the short side of the battery cell. When the folding knife assembly descends to a height close to the short side of the battery cell and the translation assembly drives the folding knife assembly to extend, the folding knife assembly rotates to ensure that when the battery cell has a poorly fitted side panel, the folding knife assembly will not hit the arched side panel.

Description

Technical Field

[0001] The present invention relates to the technical field of film wrapping devices, in particular to a film wrapping folding mechanism and a film wrapping device. Background Art

[0002] The wrapping mechanism adopts a parallel folding method. After the wrapping turntable wraps the film on the other three sides, it rotates the battery cell to the folding station. At this time, the wrapping folding knife is driven by the electric cylinder to descend to the folding position. The cylinder installed with the folding knife extends to press the insulating film against the short side of the battery cell.

[0003] However, since the folding knife is only 1mm away from the upper surface of the battery cell side panel when it descends to the folding working position, when the battery cell side panel is not well fitted, the folding knife will hit the battery cell side panel, causing the battery cell to be damaged and scrapped and the wrapping device to alarm and shut down. The equipment needs to be turned manually and then manually enter the wrapping device to remove the damaged battery cell and restart the machine, which will not only cause the battery cell to be scrapped but also affect the stability of the equipment and the production capacity of the entire line. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a film folding mechanism. When a translation assembly drives a folding knife assembly to extend, the folding knife assembly rotates to ensure that the folding knife assembly does not hit the arched side panel when the battery cell is not properly attached to the side panel.

[0005] The present invention further provides a film coating device.

[0006] According to the embodiment of the first aspect of the present invention, the membrane folding mechanism includes: a translation assembly; a folding knife assembly, the folding knife assembly and the translation assembly are fixedly connected, and the translation assembly is used to drive the folding knife assembly to move in a first direction, wherein the folding knife assembly has an initial position and a folding position, and the folding knife assembly is tilted relative to the first direction when it is in the initial position, and is parallel to the short side of the battery cell when it is in the folding position.

[0007] According to the film folding mechanism of an embodiment of the present invention, when the folding knife assembly descends to a height close to the short side of the battery cell and the translation assembly drives the folding knife assembly to extend, the folding knife assembly rotates to ensure that the folding knife assembly does not hit the arched side panel when the battery cell is not well fitted with the side panel.

[0008] According to some embodiments of the present invention, the film wrapping and folding mechanism further includes: a rotating assembly, the rotating assembly is transmission-connected to the folding knife assembly, and the rotating assembly drives the folding knife assembly to move between an initial position and the folding position.

[0009] According to some embodiments of the present invention, the rotating assembly includes: a mounting seat and a rotating member, the rotating member and the folding knife assembly are rotatably fixed on the mounting seat, one end of the rotating member is in contact with the folding knife assembly, and the rotating member drives the folding knife assembly to rotate from an initial position to a folding position when rotating.

[0010] According to some embodiments of the present invention, the rotating assembly includes: a reset member, one end of which is fixed to the mounting seat and the other end is fixed to the folding knife assembly, and the reset member is used to drive the folding knife assembly to rotate from the folding position to the initial position.

[0011] According to some embodiments of the present invention, the reset element is a spring.

[0012] According to some embodiments of the present invention, a transmission plate is provided at the lower end of the lifting assembly, and a curved surface is provided on the transmission plate. The other end of the rotating member abuts against the curved surface to make the rotating member rotate counterclockwise.

[0013] According to some embodiments of the present invention, the rotating assembly further comprises: a follower, wherein the follower is fixed at both ends of the rotating member, wherein one end of the follower abuts against the folding knife assembly, and the other end abuts against the follower and the curved surface.

[0014] According to some embodiments of the present invention, the rotating assembly includes: a first power source and a transmission gear, the transmission gear is fixed on the folding knife assembly, the first power source and the transmission gear are in transmission cooperation, and the first power source drives the folding knife assembly to rotate through the transmission gear.

[0015] According to some embodiments of the present invention, the rotating assembly includes: a second power source, a transmission member and a wheel disc, the wheel disc is fixed on the folding knife assembly, the transmission member is mounted on the wheel disc and the second power source, and the second power source drives the folding knife assembly to rotate through the transmission member and the wheel disc.

[0016] According to some embodiments of the present invention, the transmission member is a chain or a belt.

[0017] According to some embodiments of the present invention, the rotating assembly further comprises: a limiting member, wherein the limiting member is fixed on the mounting seat, and the limiting member is used to abut against the folding knife assembly when the folding knife assembly is located at the folding position.

[0018] According to some embodiments of the present invention, the mounting seat includes: a bearing seat and a rotating seat, the bearing seat and the rotating seat are connected to each other, the rotating member is rotatably fixed on the rotating seat, and the folding knife assembly is rotatably fixed on the bearing seat.

[0019] According to some embodiments of the present invention, the folding knife assembly includes: a rib plate and a folding knife, the folding knife is fixed to the rib plate, and rotating shafts are provided at both ends of the rib plate, and the rotating shafts cooperate with the bearing seat.

[0020] According to some embodiments of the present invention, the angle between the folding knife assembly and the first direction when the folding knife assembly is in the initial position is α, and α satisfies the relationship: 2.5°<α<3.5°.

[0021] According to some embodiments of the present invention, the membrane folding mechanism further includes: a lifting assembly, which is used to drive the translation assembly to move in the second direction; wherein, the lifting assembly includes: a first driving member, a first mounting plate and a lifting plate, the first driving member is fixed on the first mounting plate, and the first driving member is used to drive the lifting plate to move in the second direction, and the translation assembly is fixed on the lifting plate.

[0022] According to some embodiments of the present invention, the translation assembly includes: a second driving member, a second mounting plate and a connecting plate, the second mounting plate is fixed to the lifting plate, the second driving member is fixed to the second mounting plate, the connecting plate and the folding knife assembly are fixedly connected, and the second driving member is used to drive the connecting plate to move in the first direction.

[0023] The film wrapping device according to the second embodiment of the present invention includes the film wrapping folding mechanism.

[0024] It can be seen from the above technical solution that the present invention has the following beneficial effects: when the folding knife assembly descends to a height close to the short side of the battery cell and the translation assembly drives the folding knife assembly to extend, the folding knife assembly rotates to ensure that the folding knife assembly will not hit the arched side panel when the battery cell is not well fitted with the side panel.

[0025] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0027] Figure 1 2 is a schematic structural diagram of a film wrapping and folding mechanism according to an embodiment of the present invention;

[0028] Figure 2 2. It is a schematic structural diagram of a film folding mechanism and a battery cell according to an embodiment of the present invention;

[0029] Figure 3 yes Figure 2 A partial schematic diagram in FIG.

[0030] Figure 4 is a side view of a film folding mechanism and a battery cell according to an embodiment of the present invention;

[0031] Figure 5 2 is a side view of a folding knife assembly, a rotating assembly and a battery cell according to an embodiment of the present invention.

[0032] Reference numerals:

[0033] 100. Film folding mechanism;

[0034] 10. Lifting assembly; 11. First driving member; 12. First mounting plate; 13. Lifting plate; 14. Transmission plate;

[0035] 20. Translation assembly; 21. Second driving member; 23. Connecting plate;

[0036] 30. Folding knife assembly; 31. Rib plate; 32. Folding knife; 33. Rotating shaft; 34. Reset member mounting column;

[0037] 40. Rotating assembly; 41. Mounting seat; 411. Bearing seat; 412. Rotating seat; 42. Rotating member; 43. Resetting member; 44. Follower; 45. Limiting member;

[0038] 200. Battery cell. DETAILED DESCRIPTION

[0039] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0040] Reference below Figure 1-Figure 5 The following describes a film wrapping and folding mechanism 100 according to an embodiment of the present invention. The present invention also provides a film wrapping device.

[0041] The first direction is the front-to-back direction, and the second direction is the up-down direction.

[0042] like Figure 1-Figure 5 As shown, the film wrapping and folding mechanism 100 of the embodiment of the present invention includes: a translation component 20 and a rotation component 40.

[0043] The translation assembly 20 is fixed to the lower end of the lifting assembly 10. The lifting assembly 10 is used to drive the translation assembly 20 to move in the second direction. The folding knife assembly 30 is fixedly connected to the translation assembly 20. In other words, the lifting assembly 10 is used to drive the translation assembly 20 and the folding knife assembly 30 to move in the second direction. That is, after the turntable is rotated to the folding position, the lifting assembly 10 can drive the folding knife assembly 30 to descend to a height of 1 mm from the short side of the battery cell 200.

[0044] And, the translation assembly 20 is used to drive the folding knife assembly 30 to move in the first direction. That is, when the folding knife assembly 30 moves in the first direction, it will push the protective film to be attached to the short side of the battery core 200.

[0045] Specifically, the folding knife assembly 30 has an initial position and a folding position. When the folding knife assembly 30 is in the initial position, it is tilted relative to the first direction. The rotating assembly 40 is used to drive the folding knife assembly 30 to rotate between the initial position and the folding position.

[0046] That is to say, when the folding knife assembly 30 is in the initial position, the folding knife assembly 30 is tilted relative to the first direction, that is, the folding knife assembly 30 and the battery cell 200 are set at an angle. When the translation assembly 20 drives the folding knife assembly 30 to move in the first direction, the rotating assembly 40 will rotate counterclockwise, so that the rotating assembly 40 pushes the folding knife assembly 30 and rotates clockwise until the folding knife assembly 30 is parallel to the short side of the battery cell 200, so that when the battery cell 200 is not tightly fitted with the side panel, the folding knife assembly 30 will not push the side panel to cause the coating device to alarm and the battery cell 200 to be scrapped, which can improve the stability of the coating device and the first-time yield of the coating device.

[0047] As a result, the folding knife assembly 30 descends to a height close to the short side of the battery cell 200, and when the translation assembly 20 drives the folding knife assembly 30 to extend, the folding knife assembly 30 rotates to ensure that the folding knife assembly 30 will not hit the arched side panel when the side panel of the battery cell 200 is not well fitted.

[0048] Furthermore, the rotating assembly 40 is in transmission connection with the folding knife assembly 30. That is, the rotating assembly 40 drives the folding knife assembly 30 to rotate. Because the folding knife assembly 30 is tilted relative to the first direction when in its initial position, the rotating assembly 40 drives the folding knife assembly 30 to rotate when wrapping the short side of the battery cell 200. This allows the folding knife assembly 30 to avoid the side panels that are not tightly attached to the battery cell 200 while attaching the protective film to the short side of the battery cell 200.

[0049] like Figure 2 and Figure 3 As shown, the rotating assembly 40 includes a mounting base 41 and a rotating member 42. The rotating member 42 and the folding knife assembly 30 are rotatably fixed to the mounting base 41. One end of the rotating member 42 abuts against the folding knife assembly 30, and the rotating member 42 drives the folding knife assembly 30 to rotate from the initial position to the folding position when rotating. In other words, the rotating assembly 40 is composed of the mounting base 41 and the rotating member 42. The rotating member 42 and the folding knife assembly 30 are both rotatably fixed to the mounting base 41. In this way, when the rotating member 42 rotates, it will drive the folding knife assembly 30 to rotate.

[0050] Among them, the mounting seat 41 is fixed on the translation assembly 20, so that when the translation assembly 20 drives the folding knife assembly 30 to move in the first direction, the mounting seat 41 can move in the first direction together, thereby causing the rotating member 42 to move in the first direction together.

[0051] Moreover, when the rotating member 42 moves in the first direction, it rotates counterclockwise, thereby enabling the rotating member 42 to drive the folding knife assembly 30 to rotate clockwise, that is, to rotate from the initial position to the folding position, so that when the battery cell 200 is not tightly fitted to the side panel, the folding knife assembly 30 will not hit the side panel, causing the wrapping device to alarm and the battery cell 200 to be scrapped.

[0052] In addition, if Figure 3 As shown, the rotating assembly 40 includes a reset member 43, one end of which is fixed to the mounting base 41, and the other end of which is fixed to the folding knife assembly 30. The reset member 43 is used to drive the folding knife assembly 30 to rotate from the folding position to the initial position. In other words, the reset member 43 is disposed between the folding knife assembly 30 and the mounting base 41, and the reset member 43 can be used to drive the folding knife assembly 30 to rotate from the folding position to the initial position. That is, after the battery cell 200 is coated, the lifting assembly 10 and the translation assembly 20 are reset. At this time, the folding knife assembly 30 is not subjected to the pressure of the rotating member 42. Therefore, under the reset force of the reset member 43, the folding knife assembly 30 rotates from the folding position to the initial position, thereby facilitating the next folding film coating.

[0053] Furthermore, if Figure 3 and Figure 5 As shown, a reset member mounting column 34 is provided on both the folding knife assembly 30 and the mounting seat 41, that is, the two ends of the reset member 43 are respectively connected to the reset member mounting column 34 of the folding knife assembly 30 and the reset member mounting column 34 of the mounting seat 41.

[0054] The reset member 43 may be a spring.

[0055] In addition, if Figure 2-Figure 5 As shown, the lower end of the lifting assembly 10 is provided with a transmission plate 14. This transmission plate 14 is provided with a curved surface, and the other end of the rotating member 42 abuts against the curved surface, causing the rotating member 42 to rotate counterclockwise. Because the transmission plate 14 has one or more protruding curved surfaces, the rotating member 42 abuts against these surfaces. Rotation of the rotating member 42 drives the movement of the rotating member 42, and the curved surface on the transmission plate 14 drives the rotating member 42 to move accordingly. In other words, a cam structure is formed between the transmission plate 14 and the rotating member 42.

[0056] In this way, the rotation action of the folding knife assembly 30 is realized by a cam structure, which is lower in cost than a cylinder or a motor, and the synchronization with the extension action of the translation assembly 20 does not require high program requirements. When the translation assembly 20 is extended, the rotating part 42 rotates synchronously, so there is no need to constantly adjust the time difference between the rotation action and the extension action, and debugging is simple.

[0057] In addition, the rotating part 42 is locked on the rotating shaft, and the rotating shaft is locked on the mounting seat 41 through deep groove ball bearings at both ends so that when one end of the rotating part 42 is pressed down, the other end presses against the folding knife assembly 30, causing the folding knife assembly 30 to rotate, thereby causing the folding knife assembly 30 to rotate until it is close to the short side of the battery cell 200.

[0058] like Figure 3 As shown, the rotating assembly 40 further includes followers 44, which are fixed to both ends of the rotating member 42. One end of the followers 44 abuts against the folding knife assembly 30, and the other end of the followers 44 abuts against the curved surface. In this way, the followers 44 can effectively reduce the wear between the rotating member 42 and the transmission plate 14, and can also reduce the wear between the rotating member 42 and the folding knife assembly 30.

[0059] According to another embodiment of the present invention, the rotating assembly 40 includes: a first power source and a transmission gear, the transmission gear is fixed to the folding knife assembly 30, the first power source and the transmission gear are in transmission cooperation, and the first power source drives the folding knife assembly 30 to rotate through the transmission gear. In other words, the folding knife assembly 30 is rotated by the transmission cooperation between the first power source and the transmission gear. That is, when the folding knife assembly 30 is close to the short side of the battery cell 200, the first power source is running and drives the transmission gear to rotate through the first power source. Since the transmission gear and the folding knife assembly 30 are fixedly connected, the folding knife assembly 30 rotates.

[0060] According to another embodiment of the present invention, the rotating assembly 40 includes: a second power source, a transmission member and a wheel disc, the wheel disc being fixed on the folding knife assembly 30, the transmission member being sleeved on the wheel disc and the second power source, and the second power source driving the folding knife assembly 30 to rotate through the transmission member and the wheel disc. In other words, the folding knife assembly 30 is rotated by the transmission cooperation of the second power source, the transmission member and the wheel disc. That is, when the folding knife assembly 30 is close to the short side of the battery cell 200, the second power source is operated and drives the transmission member to rotate through the second power source, and the transmission member drives the wheel disc to rotate, and because the wheel disc is fixedly connected to the folding knife assembly 30, the folding knife assembly 30 is rotated.

[0061] Furthermore, the transmission member may be a chain or a belt.

[0062] like Figure 5As shown, the rotating assembly 40 further includes a stopper 45, which is fixed to the mounting base 41. The stopper 45 is used to abut against the folding knife assembly 30 when the folding knife assembly 30 is in the folding position. That is, the folding knife assembly 30 is limited by providing the stopper 45 so that the folding knife assembly 30 stops rotating when it rotates to the folding position.

[0063] Among them, the limiting member 45 can be a limiting block, and a slope is provided on the limiting block, which can selectively abut against the folding knife assembly 30. In this way, when the folding knife assembly 30 rotates to the folding position, the folding knife assembly 30 can cooperate with the limiting block to prevent the folding knife assembly 30 from continuing to rotate, so that the folding of the protective film can be achieved.

[0064] Of course, the limiting member 45 can also be a limiting cross bar, that is, the limiting cross bar extends in the third direction, and the limiting cross bar can selectively limit and cooperate with the rotating member 42, so that when the rotating member 42 is limited and cooperates with the limiting cross bar, the rotating member 42 cannot continue to rotate, so that the folding knife assembly 30 also stops rotating, so that the protective film can be folded.

[0065] Among them, such as Figure 3 As shown, the mounting base 41 includes: a bearing base 411 and a rotating base 412, the bearing base 411 and the rotating base 412 are connected to each other, the rotating member 42 is rotatably fixed on the rotating base 412, and the folding knife assembly 30 is rotatably fixed on the bearing base 411. In other words, the mounting base 41 is composed of the bearing base 411 and the rotating base 412 connected to each other, wherein the rotating member 42 can be rotatably fixed on the rotating base 412 via the rotating shaft 33, and the folding knife assembly 30 can be rotatably fixed on the bearing base 411 via the rotating shaft 33.

[0066] A bearing is sandwiched between the rotating shaft 33 and the rotating seat 412 , and a bearing is also sandwiched between the rotating shaft 33 and the bearing seat 411 , which can reduce the rotation resistance of the rotating shaft 33 and the rotating shaft 33 .

[0067] In addition, if Figure 2 and Figure 3 As shown, the folding knife assembly 30 includes a rib plate 31 and a folding knife 32. The folding knife 32 is fixed to the rib plate 31. Rotating shafts 33 are provided at both ends of the rib plate 31. The rotating shafts 33 cooperate with the bearing seat 411. Specifically, the folding knife 32 is fixed to the rib plate 31, and the rib plate 31 can achieve rotational cooperation with the bearing seat 411 via the rotating shafts 33. Therefore, when the rotating member 42 rotates counterclockwise, it can drive the rib plate 31 to rotate clockwise, and in turn drive the folding knife 32 to rotate clockwise, thereby achieving the folding of the protective film.

[0068] The reset member mounting post 34 is disposed on the rib plate 31 .

[0069] Among them, such as Figure 5 As shown, when the folding knife assembly 30 is in the initial position, the angle between it and the first direction is α, where α satisfies the relationship: 2.5° < α < 3.5°. That is, when the folding knife assembly 30 is in the initial position, the angle between it and the short side of the battery cell 200 is between 2.5° and 3.5°. This allows the folding knife assembly 30 to avoid interfering with the side panels of the battery cell 200 while maintaining a relatively short rotational stroke. For example, when the angle between the folding knife assembly 30 and the short side of the battery cell 200 is less than 2.5° when in the initial position, although the folding knife assembly 30 is tilted, the tilt angle is relatively small, so there is still a chance of interference with the side panels. For another example, when the angle between the folding knife assembly 30 and the short side of the battery cell 200 is greater than 3.5° when in the initial position, the rotational stroke of the folding knife assembly 30 is relatively long, which affects the folding efficiency of the folding knife assembly 30.

[0070] Preferably, the angle between the folding knife assembly 30 and the first direction when it is in the initial position is 3°.

[0071] Among them, such as Figure 2 As shown, the lifting assembly 10 includes: a first driving member 11, a first mounting plate 12, and a lifting plate 13. The first driving member 11 is fixed to the first mounting plate 12 and is used to drive the lifting plate 13 to move in the second direction. The translation assembly 20 is fixed to the lifting plate 13. In other words, the lifting assembly 10 is composed of the first driving member 11, the first mounting plate 12, and the lifting plate 13, wherein the translation assembly 20 is fixed to the lifting plate 13. Therefore, when the first driving member 11 drives the lifting plate 13 to move in the second direction, the translation assembly 20 can also move in the second direction.

[0072] A guide rail is provided between the first mounting plate 12 and the lifting plate 13 , that is, the guide rail can improve the smoothness of the relative movement between the mounting plate and the lifting plate 13 .

[0073] Furthermore, the first driving member 11 may be a driving motor or a driving cylinder.

[0074] As well as Figure 2 As shown, the translation assembly 20 includes a second driver 21, a second mounting plate, and a connecting plate 23. The second mounting plate is fixed to the lifting plate 13. The second driver 21 is fixed to the second mounting plate. The connecting plate 23 is fixedly connected to the folding knife assembly 30. The second driver 21 is used to drive the connecting plate 23 to move in the first direction. In other words, the translation assembly 20 is composed of the second driver 21, the second mounting plate, and the connecting plate 23. The second mounting plate is fixed to the lifting plate 13. Therefore, when the first driver 11 drives the lifting plate 13 to move in the second direction, the second mounting plate can also move in the second direction.

[0075] Furthermore, the second driving member 21 can drive the connecting plate 23 to move in the first direction, that is, the folding knife assembly 30 fixed on the connecting plate 23 can move in the first direction together with the connecting plate 23 .

[0076] Furthermore, the second driving member 21 may be a driving motor or a driving cylinder.

[0077] The following describes the working process of the film wrapping and folding mechanism 100 according to an embodiment of the present invention:

[0078] First, the first driving member 11 drives the lifting plate 13 to move in the second direction relative to the first mounting plate 12. When the lifting plate 13 moves in the second direction, it will drive the translation assembly 20 and the folding knife assembly 30 to move in the second direction, thereby causing the folding knife assembly 30 to move to 1 mm above the side panel of the battery cell 200.

[0079] Subsequently, the second driving member 21 drives the connecting plate 23 to move in the first direction, that is, the folding knife assembly 30 and the rotating assembly 40 move together in the first direction. Since the rotating member 42 of the rotating assembly 40 moves in the first direction, the rotating member 42 cooperates with the inclined surface on the transmission plate 14, that is, the rotating member 42 rotates counterclockwise, thereby driving the rib plate 31 to rotate clockwise, and at the same time, the folding knife 32 fixed on the rib plate 31 also rotates clockwise, so that the folding knife 32 also rotates downward when it is extended.

[0080] The film coating device according to the second embodiment of the present invention includes a film coating folding mechanism 100. Thus, the film coating device of the embodiment of the present invention is configured to have a rotatable film coating folding mechanism 100, so that the folding knife assembly 30 is driven by the lifting assembly 10 to descend to a height close to the short side of the battery cell 200. When the translation assembly 20 drives the folding knife assembly 30 to extend, the rotating assembly 40 drives the folding knife assembly 30 to rotate, ensuring that the folding knife assembly 30 does not hit the arched side panel when the side panel of the battery cell 200 is not properly fitted.

[0081] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships 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 operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0082] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0083] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A film folding mechanism, characterized in that: include: A translation assembly, the translation assembly comprising: a second driving member, a second mounting plate, and a connecting plate, the second driving member being fixed to the second mounting plate, the second driving member being configured to drive the connecting plate to move in a first direction; A folding knife assembly, wherein the folding knife assembly is fixedly connected to the connecting plate, and the translation assembly is used to drive the folding knife assembly to move in a first direction, wherein the folding knife assembly has an initial position and a folding position, wherein the folding knife assembly is tilted relative to the first direction when in the initial position, and is parallel to the short side of the battery cell when in the folding position; A rotating assembly, the rotating assembly is in transmission connection with the folding knife assembly, the rotating assembly drives the folding knife assembly to move between an initial position and the folding edge position, the rotating assembly comprises: a mounting seat and a rotating member, the rotating member and the folding knife assembly are rotatably fixed to the mounting seat, one end of the rotating member abuts against the folding knife assembly, and the rotating member drives the folding knife assembly to rotate from the initial position to the folding edge position when rotating; A lifting assembly, the lifting assembly is used to drive the translation assembly to move in the second direction, the lifting assembly includes: a first driving member, a first mounting plate and a lifting plate, the first driving member is fixed to the first mounting plate, the second mounting plate is fixed to the lifting plate, and the first driving member is used to drive the lifting plate to move in the second direction.

2. The film folding mechanism according to claim 1, characterized in that: The rotating assembly includes a reset member, one end of which is fixed on the mounting seat and the other end is fixed on the folding knife assembly, and the reset member is used to drive the folding knife assembly to rotate from the folding position to the initial position.

3. The film folding mechanism according to claim 2, characterized in that: The reset element is a spring.

4. The film folding mechanism according to claim 1, characterized in that: The rotating assembly further includes a transmission plate, wherein the transmission plate is provided with a curved surface, and the other end of the rotating member abuts against the curved surface to enable the rotating member to rotate counterclockwise.

5. The film folding mechanism according to claim 4, characterized in that: The rotating assembly further includes a follower, which is fixed at both ends of the rotating member, wherein one end of the follower abuts against the folding knife assembly, and the other end of the follower abuts against the curved surface.

6. The film folding mechanism according to claim 1, characterized in that: The rotating assembly includes: a first power source and a transmission gear, the transmission gear is fixed on the folding knife assembly, the first power source and the transmission gear are in transmission cooperation, and the first power source drives the folding knife assembly to rotate through the transmission gear.

7. The film folding mechanism according to claim 1, characterized in that: The rotating assembly includes: a second power source, a transmission member and a wheel disc, the wheel disc is fixed on the folding knife assembly, the transmission member is mounted on the wheel disc and the second power source, and the second power source drives the folding knife assembly to rotate through the transmission member and the wheel disc.

8. The film folding mechanism according to claim 7, characterized in that: The transmission member is a chain or a belt.

9. The film folding mechanism according to claim 1, characterized in that: The rotating assembly further comprises: a limiting member, which is fixed on the mounting seat and is used to abut against the folding knife assembly when the folding knife assembly is located at the folding position.

10. The film wrapping and folding mechanism according to claim 1, characterized in that: The mounting seat includes a bearing seat and a rotating seat, the bearing seat and the rotating seat are connected to each other, the rotating member is rotatably fixed on the rotating seat, and the folding knife assembly is rotatably fixed on the bearing seat.

11. The film folding mechanism according to claim 10, characterized in that: The folding knife assembly includes: a rib plate and a folding knife, the folding knife is fixed on the rib plate, and rotating shafts are provided at both ends of the rib plate, and the rotating shafts are matched with the bearing seat.

12. The film wrapping and folding mechanism according to claim 1, characterized in that: When the folding knife assembly is located at an initial position, the angle between the folding knife assembly and the first direction is α, and α satisfies the relationship: 2.5°<α<3.5°.

13. A coating device, characterized in that: include: The membrane folding mechanism according to any one of claims 1 to 12.

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