Battery pack film apparatus and battery production system

Abstract

The embodiment of the application provides a battery film wrapping device and a battery production system, and relates to the technical field of batteries. The battery film wrapping device comprises a conveying device, a cutting device, a film wrapping device and a pressing device. The conveying device is used for conveying an insulating film. The cutting device is used for cutting the insulating film in the conveying process. The film wrapping device is used for bearing a battery monomer and wrapping the cut insulating film on the battery monomer. The pressing device is used for being arranged towards the battery monomer on the film wrapping device and pressing the free end of the cut and pre-wrapped insulating film to be attached to the battery monomer. Before the insulating film is wrapped, the free end of the cut insulating film is pressed to be attached to the battery monomer by the pressing device, the possibility that the free end of the insulating film is separated from the battery monomer after cutting and causes the insulating film to be partially raised is reduced, and the wrapping quality of the insulating film and the product yield of the battery monomer are improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery packing device and a battery production system. Background Technology

[0002] In the production process of battery devices, a coating process is required, such as coating the positive electrode of a cylindrical battery cell with an insulating film to reduce the possibility of short circuits in the battery cell and thus improve the reliability of the battery device.

[0003] However, when coating cylindrical battery cells with insulating film, the insulating film is prone to peeling up after coating, which affects the coating quality and product yield. Therefore, how to improve the quality of the positive electrode coating of cylindrical battery cells is a research direction in battery technology. Summary of the Invention

[0004] This application provides a battery coating device that can improve the quality of the positive electrode coating of cylindrical battery cells.

[0005] In a first aspect, embodiments of this application provide a battery coating device, including a conveying device, a cutting device, a coating device, and a pressure applying device. The conveying device is used to convey an insulating film; the cutting device is used to cut the insulating film during the conveying process; the coating device is used to carry a battery cell and to wrap the cut insulating film over the battery cell; the pressure applying device is disposed facing the coating device and is used to make the free end of the cut and uncoated insulating film adhere to the battery cell.

[0006] By adopting the above technical solution, by adding a pressure device, the free end formed after the insulating film is cut is pressed to fit with the battery cell before the insulating film is wrapped. This reduces the possibility that the free end of the insulating film will detach from the battery cell after cutting, causing the insulating film to lift up. This improves the wrapping quality of the insulating film and the product yield of the battery cell.

[0007] In some embodiments of this application, the pressure device includes a pneumatic element for supplying airflow to the free end, so that the free end adheres to the battery cell under the action of the airflow.

[0008] By adopting the above technical solution, the pressure device is designed to include a wind pressure component. The wind pressure component can use airflow to directly press the free end of the insulating film onto the surface of the battery cell at the moment the insulating film is cut. This not only increases efficiency and helps reduce bubbles and wrinkles, but also ensures that the free end maintains a tendency to move towards the battery cell at the moment the cutting device presses it down. At this time, the wind pressure component directly applies pressure to adhere it to the battery cell, which can further improve the adhesion effect between the free end and the battery cell.

[0009] In some embodiments of this application, the air pressure component has opposite first and second ends and a third surface located between the first and second ends, the third surface being provided with at least one air outlet for outputting the airflow.

[0010] The above technical solution has an air outlet on the air pressure component, which is used to output airflow. The structure is simple and easy to implement.

[0011] In some embodiments of this application, there are multiple air outlets, which are distributed on the third surface.

[0012] By adopting the above technical solution, the air outlet is designed to be multiple and dispersed, which can improve the airflow coverage area of ​​the wind pressure component and the wind pressure supplied to the insulating film.

[0013] In some embodiments of this application, the plurality of air outlets include multiple rows along a first direction and multiple columns along a second direction, with 2 to 4 air outlets in each row and 3 to 8 air outlets in each column. The first direction is the arrangement direction from the first end to the second end, the second direction intersects the first direction, and the first direction and the second direction intersect the conveying direction of the conveying device.

[0014] By adopting the above technical solution, the airflow coverage requirements of the wind pressure component can be met while taking into account processing costs.

[0015] In some embodiments of this application, the width direction of the air pressure component is arranged along a second direction, which intersects the arrangement direction from the first end to the second end and the conveying direction of the conveying device, and the width of the air pressure component is configured to be greater than the width of the insulating film.

[0016] By adopting the above technical solution, the width of the wind pressure component is designed to be greater than the width of the insulating film, which allows the airflow of the wind pressure component to cover the surface area of ​​the insulating film.

[0017] In some embodiments of this application, the width of the air pressure component ranges from 11 mm to 33 mm.

[0018] By adopting the above technical solution, the width of the wind pressure component can be larger than the width of the insulation film of general specifications, thereby enabling the airflow of the wind pressure component to better cover the insulation film and improve the film coating quality.

[0019] In some embodiments of this application, along the second direction, the air pressure component includes a central portion disposed opposite to the insulating film and side portions located on both sides of the central portion. Both the central portion and the side portions are provided with air outlets, and the airflow velocity of the air outlet of the central portion is greater than the airflow velocity of the air outlet of the side portions.

[0020] By adopting the above technical solution, the airflow direction in the middle part can be perpendicular to the insulating film. The airflow velocity in the middle part is designed to be greater than that in the side part, which can increase the pressure on the insulating film, reduce the possibility of wrinkles or bubbles being generated in the insulating film during the coating process, and improve the coating effect.

[0021] In some embodiments of this application, the airflow velocity of the air outlet located in the middle part is two to three times that of the airflow velocity of the air outlet located on the side part.

[0022] By adopting the above technical solution, the airflow velocity at the air outlet in the middle part is further increased to improve the wind pressure, thereby making it easier for the insulating film to adhere to the battery cell.

[0023] In some embodiments of this application, the airflow direction of the air outlet located in the middle part is perpendicular to the second direction, and the airflow direction of the air outlet located on the side part forms an angle of less than 90° with the second direction and is inclined towards the middle part.

[0024] By adopting the above technical solution, the direction of the side air outlet is designed to be at an angle to the width direction of the air pressure component and tilted towards the middle, so that the airflow of the side air outlet can also converge towards the middle, thereby allowing the airflow of the side air outlet to act on the insulating film as much as possible.

[0025] In some embodiments of this application, the wind pressure component is configured to satisfy the following formula: tanB=H / [0.5(Dd)], where B is the angle between the air outlet direction of the side portion and the width direction of the wind pressure component, H is the minimum distance between the wind pressure component and the battery cell along their arrangement direction, D is the width of the wind pressure component, and d is the width of the insulating film.

[0026] By adopting the above technical solution, the airflow from the side outlet can act on the insulating film as much as possible, and work together with the airflow from the middle outlet to press the insulating film, thereby increasing the pressing force.

[0027] In some embodiments of this application, the battery cell is cylindrical, and the wind pressure component is arranged radially opposite to the battery cell.

[0028] By adopting the above technical solution, the air pressure component and the battery cell are designed to be arranged opposite each other along the radial direction of the battery cell, so that the airflow of the air pressure component can directly act on the insulating film on the battery cell.

[0029] In some embodiments of this application, the airflow generated by the wind pressure component is configured to cover the central angle corresponding to the outer peripheral surface of the battery cell in an angle range of 45 degrees to 90 degrees.

[0030] By adopting the above technical solution, the airflow of the wind pressure component can cover most of the area of ​​the battery cell facing the wind pressure component.

[0031] In some embodiments of this application, the battery cell is cylindrical, and the wind pressure component is an arc component arranged in an arc from the first end to the second end.

[0032] By adopting the above technical solution, the arc-shaped wind pressure component can provide uniform, close-fitting, and efficient clamping force, which enables the insulating film to tightly and undamagedly cover the cylindrical battery, thereby improving production efficiency and reliability.

[0033] In some embodiments of this application, the air pressure component is configured to satisfy the following formula: C=A*(R+H), where C is the arc length of the arc component, A is the radian of the central angle corresponding to the outer peripheral surface of the battery cell where the airflow generated by the air pressure component is configured to cover the outer peripheral surface of the battery cell, R is the radius of the battery cell, and H is the minimum distance between the air pressure component and the battery cell along their arrangement direction.

[0034] By adopting the above technical solution, the design of C=A*(R+H) can make the circle where the wind pressure component is located and the circle where the battery cell is located concentric, which can further improve the coverage area of ​​the airflow of the wind pressure component on the battery cell and provide more comprehensive coating pressure.

[0035] In some embodiments of this application, the coating device is configured to rotate the battery cell during the coating process so that the insulating film is rolled up and covered around the battery cell.

[0036] By adopting the above technical solution, the insulating film is wound and wrapped by rotating the battery cell. During the entire wrapping process, the air outlet can drive the wound insulating film to press against the surface of the battery cell, realizing pressure output on the insulating film throughout the wrapping process, thereby improving the wrapping effect.

[0037] In some embodiments of this application, the pressure application device further includes a moving drive mechanism connected to the air pressure component and used to drive the air pressure component to move in a direction away from or towards the coating device.

[0038] By adopting the above technical solution, the mobile drive mechanism can be used to easily move the air pressure component, thereby facilitating the adjustment of the air pressure component's position.

[0039] In some embodiments of this application, the battery cell is cylindrical, the coating device includes a drive roller and a carrier, the carrier is used to support the battery cell, the drive roller is located above the carrier and is disposed opposite to the carrier, the drive roller is used to drive the battery cell to rotate on the carrier about its own axis, and the top of the pressure device is 5mm to 10mm lower than the bottom of the drive roller.

[0040] By adopting the above technical solution, the top of the pressure device is designed to be 5mm to 10mm away from the bottom of the drive roller. This distance is the same as or similar to the distance between the top of the pressure device and the insulating film, so that the pressure device will not interfere with the insulating film or the structure used to limit the insulating film.

[0041] Secondly, embodiments of this application provide a battery production system, including battery packing equipment as described in any of the above technical solutions. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the structure of a battery pack film device provided in some embodiments of this application;

[0044] Figure 2 This is a partial structural diagram of a battery pack film device provided in some embodiments of this application after the insulating film has been cut.

[0045] Figure 3 A partial structural schematic diagram of the battery packing device provided in some embodiments of this application during the packing process;

[0046] Figure 4 This is a schematic diagram of the structure of a first type of air pressure component in a battery pack film device provided in some embodiments of this application;

[0047] Figure 5 This is a schematic diagram of the structure of a second type of air pressure component in a battery pack film device provided in some embodiments of this application;

[0048] Figure 6 This is a structural schematic diagram of a third type of air pressure component in a battery pack film device provided in some embodiments of this application;

[0049] Figure 7 This is a structural schematic diagram of a fourth type of air pressure component in a battery pack film device provided in some embodiments of this application;

[0050] Figure 8 This is a structural schematic diagram of a fifth type of air pressure component in a battery pack film device provided in some embodiments of this application;

[0051] Figure 9 A schematic diagram showing the relative positions of the air pressure component and the individual battery cells in a battery pack film device provided in some embodiments of this application;

[0052] Figure 10 This is a schematic diagram showing the relative positions of the air pressure component and the insulating film in a battery pack film device provided in some embodiments of this application;

[0053] Figure 11 This is a top view of the air pressure component and the cut insulating film of the battery pack film device provided in some embodiments of this application.

[0054] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0055] 100. Battery packing equipment;

[0056] 10. Conveying device; 11. Gripper mechanism; 12. Limiting mechanism; 13. Steering mechanism;

[0057] 20. Cutting device; 21. Mounting component; 22. Elastic pressing component; 23. Cutting blade;

[0058] 30. Coating device; 31. Coating drive mechanism; 311. Drive roller; 32. Carrying mechanism; 321. Carrying component;

[0059] 40. Pressurizing device; 41. Air pressure component; 411. First end; 412. Second end; 413. Third surface; 414. Air outlet; 415. Air inlet; 416. Middle part; 417. Side part;

[0060] 50. Insulating film; 51. First surface; 52. Second surface; 53. Free end;

[0061] 200. Battery cell;

[0062] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0064] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "including," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0065] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0066] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0068] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0069] In this application, "multiple" means two or more (including two).

[0070] The embodiments of this application will now be described in detail.

[0071] Currently, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace, among other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0072] In the production process of battery devices, an insulating film coating process is required. For example, an insulating film is coated on the positive electrode of a cylindrical battery cell using a coating equipment. The coating equipment includes a conveying device, a coating device, and a cutting device. The conveying device carries the insulating film, and the cutting device cuts the insulating film on the conveying device. The battery cell lies horizontally on the coating device located on the conveying path. The cutting device generally includes a cutting blade and an elastic pressing element (such as foam) located on one side of the cutting blade. When cutting the insulating film, the cutting blade cuts the insulating film, making the insulating film form a free end. At the same time, the elastic pressing element presses the insulating film down onto the battery cell. The coating operation is carried out as the battery cell rotates.

[0073] However, since elastic pressing components such as foam require a certain amount of deformation space, a certain gap (3mm to 5mm) needs to be reserved between the elastic pressing component and the cutting blade to facilitate the deformation of the elastic pressing component. Moreover, since the cutting blade itself has a certain thickness, the elastic pressing component cannot cover the free end of the insulating film, causing the free end to lift up when the battery cell rotates. Furthermore, the free end is prone to interfering with the V-groove of the coating device used to place the battery cell, making it easier for the insulating film to detach from the battery cell, resulting in poor coating of the battery cell and affecting the yield of the battery cell.

[0074] Therefore, reducing the phenomenon of the free end of the insulating film curling up in the battery coating is an important issue in battery manufacturing.

[0075] In view of this, this application provides a technical solution that solves the above-mentioned technical problem by applying pressure to the free end of the cut insulating film using an additional pressure device, so that the film is attached to the battery cell.

[0076] The following is in conjunction with the appendix Figure 1-11 The battery pack film device 100 provided in this application will be described.

[0077] Combined with appendix Figure 1The present application provides a battery coating device 100, including a conveying device 10, a cutting device 20, a coating device 30, and a pressure device 40. The conveying device 10 is used to convey an insulating film 50; the cutting device 20 is used to cut the insulating film 50 during the conveying process; the coating device 30 is used to carry a battery cell 200 and wrap the cut insulating film 50 around the battery cell 200; the pressure device 40 is arranged facing the coating device 30 and is used to make the free end 53 of the cut and uncoated insulating film 50 adhere to the battery cell 200.

[0078] The conveying device 10 in this embodiment is used to convey the insulating film 50. In some embodiments, the conveying device 10 may include a gripper mechanism 11, a limiting mechanism 12, a turning mechanism 13, and an unwinding mechanism (not shown in the figure). The gripper mechanism 11, the limiting mechanism 12, and the turning mechanism 13 may be arranged sequentially at intervals along the third direction Z. In some embodiments, the third direction Z is a horizontal direction.

[0079] The gripper mechanism 11 is used to grip one end of the unwound insulating film 50 and to drive the insulating film 50 for conveying along the direction away from the steering mechanism 13. The limiting mechanism 12 may include two limiting members arranged opposite to each other along a first direction. The limiting members may be roller-shaped or plate-shaped structures, etc. The limiting mechanism 12 is used to limit the displacement of the insulating film 50 along the first direction X, which may be a vertical direction. The steering mechanism 13 may include a steering roller for steering the insulating film 50, and the unwinding mechanism is used to unwind the wound insulating film 50.

[0080] During conveying, the gripper mechanism 11 clamps one end of the insulating film 50 and drives the insulating film 50 to be conveyed along the guide of the turning mechanism 13 and the limiting mechanism 12. At the same time, the unwinding roller of the unwinding mechanism rotates to provide the insulating film 50.

[0081] Of course, the conveying device 10 in this embodiment is not limited to the structure described above, and may also be other conveying devices capable of conveying the insulating film 50. These will not be listed one by one in this embodiment.

[0082] The cutting device 20 of this embodiment may include a cutting drive (not shown in the figure), a mounting member 21, an elastic pressing member 22, and a cutting blade 23. The integral structure composed of the mounting member 21, the elastic pressing member 22, and the cutting blade 23 is located between the gripper mechanism 11 and the limiting mechanism 12, and is on the conveying path of the conveying device 10.

[0083] In this embodiment, the elastic pressing member 22 can be an elastic structure such as foam or sponge. The elastic pressing member 22 and the cutting blade 23 are respectively mounted on the mounting member 21, and the two are arranged along the conveying direction of the insulating film 50 (e.g., the third direction Z in the figure). There is a certain gap between the elastic pressing member 22 and the cutting blade 23 so that the elastic pressing member 22 can have a certain deformation space when it is pressed down.

[0084] It should be noted that the third direction Z (the conveying direction of the conveying device 10) is... Figure 1 The conveying direction of the insulating film 50 before it is cut is not indicated. Figure 2 and Figure 3 The winding direction of the insulating film 50 after it has been cut.

[0085] During the cutting action, the cutting drive component moves the mounting component 21, the elastic pressing component 22, and the cutting blade 23 along the first direction X, causing the cutting blade 23 to cut the insulating film 50 below. Simultaneously, the elastic pressing component 22 presses down on the insulating film 50, allowing it to adhere to the battery cell 200. The cutting drive component can be a linear telescopic component such as an electric cylinder, hydraulic cylinder, or pneumatic cylinder, or other linear motion structures; these will not be listed individually in this embodiment.

[0086] Of course, the cutting device 20 in this embodiment is not limited to the pressing cutting structure described above, but can also be a cutting structure similar to scissors (this embodiment is not shown in the figure).

[0087] When the battery cell 200 is cylindrical, the coating device 30 in this embodiment may include a coating driving mechanism 31 and a supporting mechanism 32. The coating driving mechanism 31 is used to drive the battery cell 200 to rotate, and the supporting mechanism 32 is used to place the battery cell 200 and allow the battery cell 200 to rotate on it.

[0088] The coating drive mechanism 31 and the carrying mechanism 32 are located near the conveying path of the insulating film 50 and on one side of the insulating film 50. The coating drive mechanism 31 and the carrying mechanism 32 can also be located between the limiting mechanism 12 and the gripper mechanism 11.

[0089] In some embodiments, the coating drive may include a drive (not shown) and a drive roller 311. The carrying mechanism 32 includes two carriers 321. The drive roller 311 is driven to rotate by a drive such as a motor. The two carriers 321 are located below the insulating film 50 and are spaced apart along the second direction Y in the figure. The two carriers 321 are respectively used to carry the opposite ends of the battery cell 200. The drive roller 311 is located above the two carriers 321. After the cutting device 20 cuts the insulating film 50, the drive roller 311 drives the battery cell 200 to rotate on the two carriers 321, so that the insulating film 50, which has been partially attached to the battery cell 200, can be wound around the battery cell 200 as the battery cell 200 rotates.

[0090] The pressure device 40 in this embodiment can be a device that generates mechanical contact pressure that directly contacts the insulating film 50, or it can be a device that generates wind pressure.

[0091] Combined with appendix Figure 2 As shown, after the cutting device 20 performs the cutting, the end of the cut insulating film 50 that faces away from the gripper mechanism 11 is a free end 53. No structure can exert pressure on this free end 53, therefore, this free end 53 will exhibit a warping phenomenon on the battery cell 200. It should be noted that in this embodiment, the "free end" refers to an end with a certain length, and not an end face.

[0092] To address this issue, in this embodiment, before wrapping the insulating film 50, the pressure applying device 40 applies pressure to the free end 53 formed after the insulating film 50 is cut, pressing it until it adheres to the battery cell 200. After the free end 53 is adhered to the battery cell 200, the wrapping device 30 is used to wrap the battery cell 200. The intermediate wrapping process can be as follows: Figure 3 As shown in the image.

[0093] In this way, the possibility of the free end 53 of the insulating film 50 detaching from the battery cell 200 after cutting is reduced, which causes the insulating film 50 to partially lift up, thus improving the coating quality of the insulating film 50 and the product yield of the battery cell 200.

[0094] In some embodiments, the battery packing equipment 100 of this embodiment may further include a frame (not shown in the figure), and the conveying device 10, cutting device 20, packing device 30 and pressing device 40 described above may all be mounted on the frame, thereby improving the overall integrity of the equipment.

[0095] Combined with appendix Figure 4-8 As shown, in some examples, the pressure device 40 may optionally include a pressure member 41 for delivering airflow to the free end 53 so that the free end 53 is in contact with the battery cell 200 under the action of the airflow.

[0096] In addition, the pressure device 40 may also include an air source (not shown in the figure) connected to the air pressure component 41. The function of the air source is to provide a stable and controllable high-pressure or high-speed airflow to the air pressure component 41 to generate sufficient air pressure so that the insulating film 50 adheres to the surface of the battery cell 200. The air source may be a structure such as an air pump or an air compressor.

[0097] The wind pressure component 41 refers to a structure that can emit airflow and form wind pressure on the insulating film 50 through the airflow. The wind pressure component 41 is provided with an air inlet 415, which can be connected to an air source through a pipeline. The wind pressure component 41 can be a wind knife, nozzle or other structure. The wind pressure component 41 uses airflow power to press the free end 53 of the insulating film 50 onto the surface of the battery cell 200.

[0098] In some embodiments, the wind pressure component 41 can be located below the limiting mechanism 12. The airflow output by the wind pressure component 41 can form a uniform and controllable wind pressure, so that the insulating film 50 is tightly attached to the curved surface of the battery cell 200 in a non-contact state. Compared with mechanical contact, this can reduce the possibility of insulation damage or wrinkling.

[0099] Moreover, at the instant when the free end 53 is pressed down and cut by the cutting blade 23, the free end 53 maintains a tendency to move towards the battery cell 200 (downward) under the drive of the elastic pressing member 22. Since the wind pressure member 41 has the ability to apply pressure instantly, it can directly apply pressure to the free end 53 when the elastic pressing member 22 has just been lifted off the insulating film 50 and the free end 53 has not yet shown an upward tendency. This allows the free end 53 to better adhere to the battery cell 200, which is a technical effect that cannot be achieved by mechanical contact.

[0100] In some examples, the air pressure component 41 may optionally have a first end 411 and a second end 412 opposite to each other and a third surface 413 located between the first end 411 and the second end 412, the third surface 413 being provided with at least one air outlet 414 for outputting airflow.

[0101] The insulating film 50 includes a first surface 51 and a second surface 52 arranged in opposite directions along its own thickness direction. The first surface 51 of the insulating film 50 is the contact surface that adheres to the battery cell 200, and the second surface 52 is the surface that faces away from the battery cell 200.

[0102] The wind pressure component 41 has a first end 411 facing the first surface 51 and a second end 412 facing away from the first surface 51. In some embodiments, the first surface 51 of the insulating film 50 may be the lower surface and the second surface 52 may be the upper surface. Accordingly, the first end 411 of the wind pressure component 41 may be the upper end and the second end 412 may be the lower end.

[0103] The third surface 413 of the wind pressure component 41 is set to face the battery cell 200. An air outlet 414 is provided on the third surface 413. The air outlet 414 is used to output airflow to directly blow the insulating film 50. The structure is simple and easy to implement.

[0104] Referring again to 4-8, in some examples, optionally, there are multiple air outlets 414, which are distributed on the third surface 413.

[0105] In some embodiments, a plurality of air outlets 414 are arranged at intervals along a first direction X and / or a second direction Y, wherein the first direction X is the arrangement direction from the first end 411 to the second end 412, and the second direction Y intersects the first direction X.

[0106] Multiple air outlets 414 refer to two or more air outlets 414. For example, the number of air outlets 414 can be two, three, five, ten, fifteen, etc. This embodiment will not list them in detail.

[0107] Multiple air outlets 414 are arranged at intervals along the first direction X and / or the second direction Y, meaning that the multiple air outlets 414 can, as Figure 4 The arrangement shown is spaced out along the first direction X, but there are no multiple spaced-out arrangements along the second direction Y. Alternatively, the arrangement can be spaced out only along the second direction Y, without spaced out along the first direction X (this embodiment is not shown in the figure).

[0108] It can also be like Figure 5-8 As shown, multiple air outlets 414 are arranged at intervals along the first direction X, and multiple air outlets 414 are also arranged at intervals along the second direction Y.

[0109] In some embodiments, the first direction X is a vertical direction, and the second direction Y is a horizontal direction perpendicular to the aforementioned third direction Z.

[0110] In this embodiment, the air outlet 414 is designed as a plurality of outlets arranged along the first direction X and / or the second direction Y, which can increase the coverage area of ​​the airflow of the wind pressure component 41 and the wind pressure supplied to the insulating film 50.

[0111] In some examples, optionally, the plurality of air outlets 414 include multiple rows along a first direction X and multiple columns along a second direction Y, with each row having 2 to 4 air outlets 414 and each column having 3 to 8 air outlets 414, the first direction X being the arrangement direction from the first end 411 to the second end 412, the second direction Y intersecting the first direction X, and the first direction X and the second direction Y intersecting the conveying direction of the conveying device 10 respectively.

[0112] "Column" refers to the linear arrangement of multiple air outlets 414 along the first direction X (the length direction of the air pressure component 41), and "row" refers to the spaced distribution of multiple air outlets 414 along the second direction Y (the width direction). By arranging 2-4 outlets per row and 3-8 outlets per column in a regular pattern, an equally spaced matrix layout is formed.

[0113] The above-mentioned design of the air outlet 414 as a regularly arranged structure can make the airflow pressure field have a uniform gradient distribution, reducing the fitting defects caused by uneven local pressure; and can meet the airflow coverage area requirements of the wind pressure component 41 while taking into account the processing cost.

[0114] In some examples, optionally, the width direction of the air pressure component 41 is set along the second direction Y, which intersects the arrangement direction of the first end 411 to the second end 412 and the conveying direction of the conveying device 10, and the width of the air pressure component 41 is configured to be greater than the width of the insulating film 50.

[0115] The width of the air pressure component 41 is greater than or equal to the width of the insulating film 50, the width direction of the air pressure component 41 is consistent with the width direction of the insulating film 50, and the air pressure component 41 can be located directly below the insulating film 50 during transportation.

[0116] In this way, the width of the wind pressure component 41 can be completely matched with the width of the free end 53 formed after the insulation film 50 is cut, and the coverage area of ​​the airflow of the wind pressure component 41 on the insulation film 50 during the subsequent wrapping process is increased, thereby applying better pressure to the insulation film 50, so that the insulation film 50 can adhere tightly to the surface of the battery cell 200, and reducing the possibility of bubbles and wrinkles appearing on the insulation film 50.

[0117] In some examples, the width of the air pressure component 41 may optionally range from 11 mm to 33 mm.

[0118] The width of the air pressure component 41 is 11mm to 33mm. For example, the air pressure component 41 can be 11mm, 15mm, 20mm, 25mm, 30mm and 33mm, etc. This embodiment will not list them one by one.

[0119] The width of the air pressure component 41 with the above dimensions is larger than the width of the insulating film 50 of general specifications. When the air pressure component 41 faces the insulating film 50 directly, the airflow of the air pressure component 41 can better cover the insulating film 50, thereby improving the film coating quality.

[0120] Combined with appendix Figure 10As shown, in some examples, optionally, along the second direction Y, the air pressure component 41 includes a central portion 416 disposed opposite to the insulating film 50 and side portions 417 located on both sides of the central portion 416. Both the central portion 416 and the side portions 417 are provided with air outlets 414, and the airflow velocity of the air outlet 414 of the central portion 416 is greater than the airflow velocity of the air outlet 414 of the side portions 417.

[0121] The width of the middle portion 416 can be less than, greater than or equal to the width of the side portion 417. For ease of understanding, the middle portion 416 and the side portion 417 are separated by a dashed line in this embodiment.

[0122] It should be noted that the air outlet 414 of the middle part 416 refers to the air outlet 414 that is partially or entirely located in the middle part 416. Similarly, the air outlet 414 of the side part 417 refers to the air outlet 414 that is partially or entirely located in the side part 417. When a part of an air outlet 414 is located in the middle part 416 and another part is located in the side part 417, the part to which the air outlet 414 belongs is determined by the larger area of ​​that part.

[0123] For example, if one-third of an air outlet 414 is located in the middle part 416 and the other two-thirds is located in one of the side parts 417, then it can be determined that the air outlet 414 is located in the side part 417.

[0124] The airflow velocity refers to the wind speed at the air outlet 414. By setting the wind speed at the air outlet 414, which is perpendicular to the middle part 416 of the insulating film 50, to be greater than the wind speed at the air outlet 414, which is inclined to blow towards both sides of the insulating film 50, the vertical airflow can exert greater positive pressure on the insulating film 50, so that the main body area of ​​the insulating film 50 is preferentially and tightly attached to the surface of the battery cell 200. Meanwhile, the lower-velocity inclined airflow can gently guide the two sides of the insulating film 50 to gradually extend and attach, reducing the wrinkling or displacement of the film material caused by excessive lateral wind force.

[0125] This differentiated wind speed design allows for efficient bonding of the central area of ​​the insulating film 50, while also enabling the film edges to naturally expand under the influence of smaller lateral wind forces, effectively eliminating edge bubbles and wrinkles. At the same time, by optimizing airflow distribution, it reduces the possibility of edge stress concentration that may occur with uniform high-speed airflow, thereby improving the flatness of the film bonding process, as well as improving process reliability and energy efficiency.

[0126] In some examples, optionally, the airflow velocity of the outlet 414 located in the middle portion 416 is two to three times that of the airflow velocity of the outlet 414 located in the side portion 417.

[0127] The ratio of the airflow velocity at the air outlet 414 of the middle part 416 to the airflow velocity at the air outlet 414 of the side part 417 can be (2:1), (2.2:1), (2.5:1), (2.8:1), and (3:1), etc. This embodiment will not list them in detail.

[0128] Experiments have shown that, under the airflow velocity design within the above ratio range, vertical airflow can efficiently drive the insulating film 50 to quickly adhere to the battery cell 200, while inclined airflow gently guides the edge extension of the insulating film 50, effectively improving the overall adhesion flatness and reducing energy consumption.

[0129] In some examples, optionally, the airflow direction of the air outlet 414 located in the middle portion 416 is perpendicular to the second direction Y, and the airflow direction of the air outlet 414 located in the side portion 417 forms an angle of less than 90° with the second direction Y and is inclined towards the middle portion 416.

[0130] In this embodiment, "intersection" refers to two directions forming an angle of less than or equal to 90°. Therefore, in some embodiments, "intersection" refers to two directions being perpendicular to each other.

[0131] With this design, the airflow direction of the middle part 416 can be perpendicular to the insulating film 50. The airflow velocity of the middle part 416 is designed to be greater than that of the side part 417, which can increase the pressure on the insulating film 50, reduce the possibility of wrinkles or bubbles being generated in the insulating film 50 during the coating process, and improve the coating effect.

[0132] Combined with appendix Figure 11 As shown, in some examples, the wind pressure component 41 is optionally configured to satisfy the following formula: tanB=H / [0.5(Dd)], where B is the angle between the air outlet 414 of the side 417 and the width direction of the wind pressure component 41, H is the minimum distance between the wind pressure component 41 and the battery cell 200 along their arrangement direction, D is the width of the wind pressure component 41, and d is the width of the insulating film 50.

[0133] By precisely controlling the air outlet direction (angle B) of the side 417 air outlet 414, the airflow can efficiently act on the insulating film 50. The physical meaning of the formula tanB=H / [0.5(Dd)] is:

[0134] The denominator 0.5 (Dd) represents half the difference between the width of the air pressure component 41 and the width of the insulating film 50; the numerator H is the minimum distance between the air pressure component 41 and the battery cell 200, representing the longitudinal distance that the airflow needs to cross. When the battery cell 200 is cylindrical and the air pressure component 41 is an arc concentric with the battery cell 200, this minimum distance is the difference between the radius of the battery cell 200 and the radius of the air pressure component 41. The ratio of the two (tanB) determines the airflow inclination angle B of the side 417, so that after the airflow is ejected from the air outlet 414 of the side 417, its lateral velocity component can just cover the edge of the insulating film 50.

[0135] During air discharge, the airflow from the outlet 414 of the middle section 416 is vertically downward, directly pressing the middle of the insulating film 50; the airflow from the outlet 414 of the side section 417 is sprayed obliquely at an angle B, supplementing the pressing force in the edge area. Through the optimization of angle B, the landing points of the airflow on both sides and the airflow in the middle are seamlessly connected, reducing the phenomenon of local pressure loss.

[0136] When tanB = H / [0.5(Dd)], the trajectory of the airflow on the side 417 can be decomposed into longitudinal velocity (overcoming the gap H) and lateral velocity (covering 0.5(Dd)). Under this condition, when the airflow reaches the edge of the insulating membrane 50, the lateral kinetic energy is just exhausted, reducing the possibility of airflow overflowing or failing to reach the target area, thereby optimizing the pressure transmission efficiency.

[0137] The central airflow and the side airflow (417) form a "center-edge" composite pressure field. If the tilt angle B is too small, the side airflow (417) cannot reach the edge of the insulating membrane 50; if B is too large, the airflow will excessively impact the edge, resulting in insufficient pressure in the center. The B value defined by the formula ensures that the pressure distribution of the two airflows is superimposed, resulting in a more uniform overall clamping force and reducing the risk of warping of the insulating membrane 50.

[0138] Combined with appendix Figure 9 As shown, in some examples, optionally, the battery cell 200 is cylindrical, and the air pressure member 41 is arranged opposite to the battery cell 200 along the radial direction of the battery cell 200. The airflow generated by the air pressure member 41 is configured to cover the central angle corresponding to the outer peripheral surface of the battery cell 200 in the range of 45 degrees to 90 degrees.

[0139] In some embodiments, the cylindrical battery cell 200 is a lithium-ion battery with a cylindrical metal casing (such as steel or aluminum).

[0140] The air pressure component 41 and the battery cell 200 are designed to be arranged opposite each other along the radial direction of the battery cell 200, so that the airflow of the air pressure component 41 can directly act on the insulating film 50 on the battery cell 200.

[0141] The central angle corresponding to the portion of the outer periphery of the battery cell 200 covered by the airflow generated by the wind pressure component 41 is α, and the angle range of α is 45 degrees to 90 degrees.

[0142] The reason for adopting the above-mentioned angle range design is that when the battery cell 200 is installed between the bearing mechanism 32 and the coating driving mechanism 31, the maximum angle of the battery cell 200 facing the wind pressure component 41 is less than 180 degrees. If the airflow generated by the wind pressure component 41 covers all areas of the battery cell 200 facing the wind pressure component 41, the size of the wind pressure component 41 needs to be increased, thereby increasing the production cost. Moreover, the wind pressure component 41 interferes with the limiting mechanism 12. Therefore, the airflow of the wind pressure component 41 will not cover all areas of the battery cell 200 facing the wind pressure component 41.

[0143] Moreover, since the battery cell 200 rotates dynamically during the coating process, as long as the area of ​​the battery cell 200 facing the air pressure component 41 is covered, the insulating film 50 on all areas of the battery cell 200 can be pressed by air pressure. When the angle of α is in the range of 45 degrees to 90 degrees, the production cost of the air pressure component 41 and the coverage area of ​​the airflow on the battery cell 200 can be balanced.

[0144] Combined again with the appendix Figure 9 As shown, in some examples, optionally, the battery cell 200 is cylindrical, and the wind pressure component 41 is an arc component arranged in an arc from the first end 411 to the second end 412.

[0145] The use of airflow from the arc-shaped air pressure component 41 to press the insulating film over the battery cell 200 has the following advantages: the arc surface can match the curved surface of the cylindrical battery cell, ensuring that the insulating film is subjected to uniform force and tightly adhered throughout the circumference, reducing wrinkles or gaps. This lowers the risk of localized stress concentration leading to insulation film damage or battery damage.

[0146] In some examples, the air pressure component 41 is optionally configured to satisfy the following formula: C=A*(R+H), where C is the arc length of the air pressure component 41, A is the radian of the central angle corresponding to the outer peripheral surface of the battery cell 200 where the airflow generated by the air pressure component 41 is configured to cover the outer peripheral surface of the battery cell 200, R is the radius of the battery cell 200, and H is the minimum distance between the air pressure component 41 and the battery cell 200 along their respective orientations.

[0147] The above technical solution designs the arc length of its wind pressure component 41 to satisfy the formula C=A*(R+H), where A is the radian of α mentioned above, and the specific formula can be: A=α×π / 180. R is the battery radius, and H is the difference between the radius of the wind pressure component 41 and the radius R of the battery cell 200.

[0148] When the above formula is satisfied, (R+H) is exactly equal to the radius of the arc where the wind pressure component 41 is located, so that the wind pressure component 41 is designed as an arc structure with the same center as the cylindrical battery.

[0149] In this way, the airflow generated by the air pressure component 41 can be evenly diffused along the radial direction of the battery, ensuring that the airflow direction is always perpendicular to the battery surface. This optimizes the impact angle of the airflow on the insulating film 50, reduces the possibility of film wrinkles or edge lifting caused by uneven local pressure, and improves the flatness of the film application. Moreover, it can further increase the coverage area of ​​the airflow from the air pressure component 41 on the battery cell 200, providing more comprehensive coating pressure.

[0150] In some examples, the coating device 30 is optionally configured to rotate the battery cell 200 during the coating process so that the insulating film 50 is wound around and covered on the battery cell 200.

[0151] Regarding the coating device 30 driving the battery cell 200 to rotate, it can be driven by the aforementioned drive roller 311 driving the battery cell 200 located on the support member 321 to rotate, or the coating device 30 can be designed to include a mounting frame with two rotating members that can move closer to or further away from each other (this embodiment is not shown in the figure). The two rotating members abut against the two ends of the axial direction of the battery cell 200 respectively, and the rotation of at least one of the two rotating members drives the rotation of the battery cell 200.

[0152] A portion of the multiple vents 414 is used to attach the free end 53 to the battery cell 200, and another portion of the multiple vents 414 is used to press the insulating film 50 during the winding process onto the surface of the rotating battery cell 200.

[0153] The number of air outlets 414 is designed to be multiple. During the wrapping process, after the cutting device 20 cuts the insulating film 50, a portion of the air outlets 414 are used to directly attach the free end 53 of the insulating film 50 to the battery cell 200. Then, as the battery cell 200 rotates, the aforementioned portion of the air outlets 414 is also used to press the wound insulating film 50 against the surface of the rotating battery cell 200. The other portion is only used to press the wound insulating film 50 against the surface of the rotating battery cell 200, thus realizing pressure output on the insulating film 50 throughout the wrapping process, thereby improving the wrapping effect.

[0154] In some examples, the pressure device 40 may optionally include a moving drive mechanism (not shown) connected to the air pressure component 41 and used to move the air pressure component 41 in a direction away from or towards the coating device 30.

[0155] The mobile drive mechanism facilitates the movement of the air pressure component 41, thereby making it easy to adjust the position of the air pressure component 41. It can also adjust the range and force of the air blowing from the air pressure component 41. When the film wrapping is not required, the pressure device 40 can be moved outside the conveying path of the insulating film 50 without affecting the conveying of the insulating film 50. It can also be used for pressure application in other processes.

[0156] The wind pressure component 41 can be located in a direction away from or close to the coating device 30, which can be at least one of the three directions shown in the figure: the first direction X, the second direction Y, and the third direction Z. Therefore, the structural form of the mobile drive mechanism in this embodiment is also varied.

[0157] When it is only necessary to drive the air pressure component 41 to move in one direction, the moving drive mechanism can be any kind of linear motion mechanism.

[0158] When it is necessary to drive the air pressure component 41 to move in two directions, the moving drive mechanism can be a second linear motion component connected to the first linear motion component. In this case, the first linear motion component is used to drive the second linear motion component to reciprocate along one of the two directions, and the second linear motion component is used to drive the air pressure component 41 to reciprocate along the other of the two directions.

[0159] When it is necessary to drive the air pressure component 41 to move in three directions, a third linear motion component can be added. The first linear motion component is used to drive the second linear motion component to perform linear reciprocating motion in the first of the three directions. The second linear motion component is used to drive the third linear motion component to perform linear reciprocating motion in the second of the three directions. The third linear motion component drives the air pressure component 41 to perform linear reciprocating motion in the third of the three directions.

[0160] Of course, in addition to linear motion, the air pressure component 41 can also be rotated around a circumference by a rotating structure, which can also achieve position adjustment of the air pressure component 41 in two directions.

[0161] Combined again with the appendix Figure 9 As shown, in some examples, optionally, the battery cell 200 is cylindrical, and the coating device 30 includes a drive roller 311 and a carrier 321. The carrier 321 is used to carry the battery cell 200, and the drive roller 311 is located above the carrier 321 and is disposed opposite to the carrier 321. The drive roller 311 is used to drive the battery cell 200 to rotate around its own axis on the carrier 321. The top of the pressure device 40 is 5 mm to 10 mm lower than the bottom of the drive roller 311.

[0162] The bottom of the drive roller 311 abuts against the top of the battery cell 200, so that the two are level or nearly level. When the top of the pressure device 40 is 5mm to 10mm lower than the bottom of the drive roller 311, the top of the pressure device 40 can be 5mm to 10mm lower than the top of the battery cell 200.

[0163] The top of the pressure device 40 is 5mm to 10mm lower than the top of the battery cell 200. This means that the difference L between the height of the battery cell 200 mounted on the coating device 30 and the height of the pressure device 40 is 5mm to 10mm. Specifically, it can be 5mm, 6mm, 7mm, 8mm, 9mm and 10mm, etc. This embodiment will not list them in detail.

[0164] The top of the pressure device 40 is designed to be 5mm to 10mm away from the top of the battery cell 200. This distance is the same as or similar to the distance between the top of the pressure device 40 and the insulating film 50, so that the pressure device 40 will not interfere with the conveying of the insulating film 50. In particular, when the conveying device 10 includes the aforementioned limiting roller, the pressure device 40 will not interfere with the limiting roller.

[0165] Secondly, embodiments of this application provide a battery production system, including a battery packing device 100 as described in any of the above technical solutions.

[0166] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0167] Combined with appendix Figure 1-11As shown in the illustration, this application provides a battery coating device 100, including a conveying device 10, a cutting device 20, a coating device 30, and a pressing device 40. The conveying device 10 is used to convey an insulating film 50; the cutting device 20 is used to cut the insulating film 50 during the conveying process; the coating device 30 is used to carry a battery cell 200 and wrap the cut insulating film 50 around the battery cell 200; the pressing device 40 is positioned facing the coating device 30 and is used to make the free end 53 of the cut and uncoated insulating film 50 adhere to the battery cell 200. The pressing device 40 includes a pneumatic member 41, which is used to deliver airflow to the free end 53 so that the free end 53 adheres to the battery cell 200 under the action of the airflow. The pneumatic member 41 has a first end 411 and a second end 412 opposite to each other and a third surface 413 located between the first end 411 and the second end 412. The third surface 413 is provided with at least one air outlet 414 for outputting airflow. Multiple air outlets 414 are distributed on the third surface 413. The multiple air outlets 414 include multiple rows along a first direction X and multiple columns along a second direction Y. Each row contains 2 to 4 air outlets 414, and each column contains 3 to 8 air outlets 414. The first direction X is the arrangement direction from the first end 411 to the second end 412. The second direction Y intersects the first direction X, and both the first direction X and the second direction Y intersect the conveying direction of the conveying device 10. The width of the air pressure component 41 is arranged along the second direction Y, which intersects the arrangement direction from the first end 411 to the second end 412 and the conveying direction of the conveying device 10. The width of the air pressure component 41 is configured to be greater than the width of the insulating film 50. The width of the air pressure component 41 ranges from 11 mm to 33 mm. Along the second direction Y, the air pressure component 41 includes a central portion 416 disposed opposite to the insulating film 50 and side portions 417 located on both sides of the central portion 416. Both the central portion 416 and the side portions 417 are provided with air outlets 414. The airflow velocity at the air outlet 414 of the central portion 416 is greater than the airflow velocity at the air outlet 414 of the side portions 417. The airflow velocity at the air outlet 414 of the central portion 416 is two to three times the airflow velocity at the air outlet 414 of the side portions 417. The airflow direction at the air outlet 414 of the central portion 416 is perpendicular to the second direction Y, and the airflow direction at the air outlet 414 of the side portions 417 forms an angle of less than 90° with the second direction Y and is inclined towards the central portion 416. The air pressure component 41 is configured to satisfy the following formula: tanB=H / [0.5(Dd)], where B is the angle between the air outlet 414 of the side 417 and the width direction of the air pressure component 41, H is the minimum distance between the air pressure component 41 and the battery cell 200 along their arrangement direction, D is the width of the air pressure component 41, and d is the width of the insulating film 50.The battery cell 200 is cylindrical, and the air pressure component 41 is arranged radially opposite to the battery cell 200. The airflow generated by the air pressure component 41 is configured to cover the central angle corresponding to the outer peripheral surface of the battery cell 200, with an angle ranging from 45 degrees to 90 degrees. The battery cell 200 is cylindrical, and the air pressure component 41 is an arc-shaped component arranged from the first end 411 to the second end 412. The air pressure component 41 is configured to satisfy the following formula: C=A*(R+H), where C is the arc length of the arc component, A is the radian of the central angle corresponding to the outer peripheral surface of the battery cell 200, R is the radius of the battery cell 200, and H is the minimum distance between the air pressure component 41 and the battery cell 200 along their arrangement direction. The coating device 30 is configured to drive the battery cell 200 to rotate during the coating process, so that the insulating film 50 is rolled up and wrapped around the battery cell 200. The pressure application device 40 also includes a moving drive mechanism, which is connected to the air pressure component 41 and is used to drive the air pressure component 41 to move in a direction away from or towards the coating device 30. The battery cell 200 is cylindrical. The coating device 30 includes a drive roller 311 and a support component 321. The support component 321 is used to support the battery cell 200. The drive roller 311 is located above the support component 321 and is arranged opposite to the support component 321. The drive roller 311 is used to drive the battery cell 200 to rotate around its own axis on the support component 321. The top of the pressure application device 40 is 5 mm to 10 mm lower than the bottom of the drive roller 311.

[0168] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0169] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A battery packing device, characterized in that, include: A conveying device used to convey insulating film; A cutting device for cutting the insulating film during the conveying process; A coating device for carrying a battery cell and configured to rotate the battery cell during the coating process so that the cut insulating film is rolled up and wrapped around the battery cell; as well as A pressure device, facing the coating device, includes a pressure component and a moving drive mechanism. The pressure component is used to deliver airflow to the free end of the insulating film formed after cutting and before coating, so that the free end adheres to the battery cell under the action of the airflow, and is used to press the insulating film on the surface of the rotating battery cell during the winding process. The moving drive mechanism is connected to the pressure component and is used to drive the pressure component to move in a direction away from or towards the coating device, so as to adjust the position of the pressure component relative to the battery cell and the blowing range. The air pressure component has opposite first and second ends and a third surface located between the first and second ends, the third surface being provided with at least one air outlet for outputting the airflow; The width direction of the air pressure component is arranged along a second direction, which intersects the arrangement direction from the first end to the second end and the conveying direction of the conveying device. Along the width direction of the air pressure component, the air pressure component includes a middle part for being disposed opposite to the insulating film and side parts located on both sides of the middle part. Both the middle part and the side parts are provided with air outlets. The airflow velocity of the air outlet of the middle part is greater than the airflow velocity of the air outlet of the side parts.

2. The battery packing equipment according to claim 1, characterized in that, The number of air outlets is multiple, and the multiple air outlets are distributed on the third surface.

3. The battery packing equipment according to claim 2, characterized in that, The plurality of air outlets include multiple rows along a first direction and multiple columns along a second direction. Each row has 2 to 4 air outlets, and each column has 3 to 8 air outlets. The first direction is the arrangement direction from the first end to the second end. The second direction intersects the first direction, and the first direction and the second direction intersect the conveying direction of the conveying device.

4. The battery pack film equipment according to claim 1, characterized in that, The width of the air pressure component is configured to be greater than the width of the insulating film.

5. The battery packing equipment according to claim 4, characterized in that, The width of the air pressure component ranges from 11 mm to 33 mm.

6. The battery packing equipment according to claim 1, characterized in that, The airflow velocity of the air outlet located in the middle part is two to three times that of the airflow velocity of the air outlet located on the side part.

7. The battery packing equipment according to claim 6, characterized in that, The airflow direction of the air outlet located in the middle part is perpendicular to the second direction, and the airflow direction of the air outlet located on the side part forms an angle of less than 90° with the second direction and is inclined towards the middle part.

8. The battery packing equipment according to claim 7, characterized in that, The wind pressure component is configured to satisfy the following formula: tanB=H / [0.5(Dd)], where B is the angle between the air outlet direction of the side portion and the second direction, H is the minimum distance between the wind pressure component and the battery cell along their arrangement direction, D is the width of the wind pressure component, and d is the width of the insulating film.

9. The battery packing equipment according to any one of claims 2-8, characterized in that, The battery cell is cylindrical, and the air pressure component is arranged radially opposite to the battery cell. The airflow generated by the air pressure component is configured to cover the central angle corresponding to the outer peripheral surface of the battery cell, which is in the range of 45 degrees to 90 degrees.

10. The battery packing equipment according to any one of claims 1-8, characterized in that, The battery cell is cylindrical, and the wind pressure component is an arc-shaped component that extends from the first end to the second end.

11. The battery packing equipment according to claim 10, characterized in that, The air pressure component is configured to satisfy the following formula: C=A*(R+H), where C is the arc length of the arc component, A is the radian of the central angle corresponding to the outer peripheral surface of the battery cell where the airflow generated by the air pressure component is configured to cover the outer peripheral surface of the battery cell, R is the radius of the battery cell, and H is the minimum distance between the air pressure component and the battery cell along their arrangement direction.

12. The battery packing equipment according to any one of claims 1-8, characterized in that, The battery cell is cylindrical. The coating device includes a drive roller and a carrier. The carrier is used to support the battery cell. The drive roller is located above the carrier and is opposite to the carrier. The drive roller is used to drive the battery cell to rotate around its own axis on the carrier. The top of the pressure device is 5mm to 10mm lower than the bottom of the drive roller.

13. A battery production system, characterized in that, Includes the battery packing device as described in any one of claims 1-12.

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