Film coating equipment

Abstract

The utility model discloses film coating equipment which comprises a bearing piece and a clamping mechanism, and the bearing piece is used for bearing an insulating film and an electrode assembly; the clamping mechanism comprises a clamping part and a driving assembly, the clamping part is used for clamping the insulating film, the driving assembly is used for driving the clamping part to horizontally move in the first direction and horizontally move and rotate in the second direction, a rotating shaft of the clamping part is parallel to the third direction, and the first direction, the second direction and the third direction are arranged in a pairwise intersecting mode. According to the film coating equipment provided by the embodiment of the invention, the processing efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a coating device. Background Art

[0002] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0003] The development of battery technology must take into account multiple design factors at the same time. For example, how to improve the processing efficiency of battery cells is an important research direction in the battery field. Utility Model Content

[0004] The present application provides a coating device, which can improve the processing efficiency of battery cells.

[0005] In the first aspect, the present application provides a coating device, including a supporting member and a clamping mechanism, the supporting member is used to carry an insulating film and an electrode assembly; the clamping mechanism includes a clamping part and a driving component, the clamping part is used to clamp the insulating film, the driving component is used to drive the clamping part to translate along a first direction, translate along a second direction, and rotate, the rotating axis of the clamping part is parallel to the third direction, and the first direction, the second direction, and the third direction are arranged to intersect each other.

[0006] In the technical solution of the embodiment of the present application, a supporting member for carrying a battery cell and a clamping mechanism for clamping and driving the insulating film to move are provided in the coating device, wherein the clamping mechanism includes a clamping part and a driving component, and the driving component can drive the clamping part to move in two different directions, and can also drive the clamping part to rotate around another direction, thereby being able to flexibly adjust the moving trajectory of the insulating film, and independently and conveniently completing the coating of the insulating film through the clamping mechanism, thereby reducing the process steps and processing time required for coating, and thus improving the processing efficiency.

[0007] According to some embodiments of the present application, the film coating device includes a plurality of clamping mechanisms, which are respectively arranged on two opposite sides of the supporting member in the third direction. The plurality of clamping mechanisms work together to further improve the flexibility of the insulating film movement.

[0008] According to some embodiments of the present application, in the third direction, a plurality of clamping mechanisms are symmetrically arranged to improve the synchronization of the movement of the clamping parts and reduce the possibility of wrinkling and tilting of the insulating film.

[0009] According to some embodiments of the present application, the driving assembly includes a first driving part and a second driving part, the second driving part is movably connected to the first driving part, and the second driving part can move relative to the first driving part in a first direction; the clamping part is movably connected to the second driving part, and the clamping part can move relative to the second driving part in a second direction. The driving assembly realizes movement in two directions in sequence through the two driving parts, making it easy to control.

[0010] According to some embodiments of the present application, the first driving part and the second driving part are respectively provided with a first slide rail and a second slide rail, the second driving part and the clamping part are respectively provided with a first sliding part and a second sliding part, the first sliding part is slidably matched with the first slide rail, and the second sliding part is slidably matched with the second slide rail. The cooperation between the slide rail and the sliding part makes the movement smooth and reduces the possibility of shaking during the movement.

[0011] According to some embodiments of the present application, the supporting member has a supporting surface, a fixing member is disposed on a side of the supporting member close to the supporting surface, and the fixing member is at least partially located on a side of the supporting surface in the second direction and is spaced apart from the supporting surface. A fixing member is disposed on a side close to the insulating film and the battery cell to limit the insulating film and / or the battery cell and improve the alignment accuracy of the two.

[0012] According to some embodiments of the present application, the fixing member is located at one end of the supporting surface in the first direction, and the supporting member is provided with multiple fixing members, which are spaced apart along the third direction. The multiple fixing members are provided at the same time to reduce the possibility of floating and wrinkling of the insulating film.

[0013] According to some embodiments of the present application, the film coating device further comprises a fixing member, the fixing member is used to support the supporting member, and the supporting member is detachably connected to the fixing member. Different supporting members can be conveniently replaced through the detachable connection to adapt to battery cells and insulating films of different sizes.

[0014] According to some embodiments of the present application, the driving assembly includes a rotating motor, the clamping part is connected to the rotating motor, and the rotating motor can drive the clamping part to rotate to a preset position. The rotation of the clamping part is controlled by the rotating motor, thereby improving the control accuracy.

[0015] According to some embodiments of the present application, the clamping part includes a cylinder and two clamping jaws arranged opposite to each other, and the cylinder is used to drive the two clamping jaws to open and close. The insulating film is fixed by the cooperation between the cylinder and the clamping jaws, so that the clamping is stable and reliable and not easy to loosen.

[0016] According to some embodiments of the present application, a buffer layer is provided on each side of the two clamping jaws close to each other, and the buffer layer is used to press the insulating film tightly, thereby reducing the possibility of damaging the insulating film.

[0017] According to some embodiments of the present application, the film coating device further comprises a controller, which is respectively connected to the driving assembly and the clamping part in communication. The controller is provided to control the movement and rotation of the clamping part.

[0018] According to some embodiments of the present application, the film coating device further comprises a hot press, which is arranged downstream of the clamping mechanism and is used to weld the insulating film. The two ends of the insulating film are connected by the hot press to form a tight package. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0020] Figure 1 A schematic diagram of the structure of a coating device provided in some embodiments of the present application;

[0021] Figure 2 A schematic diagram of the structure of a supporting member provided in some embodiments of the present application;

[0022] Figure 3 A schematic diagram of the structure of a clamping mechanism provided in some embodiments of the present application;

[0023] Figure 4 A schematic diagram of the structure of the clamping portion provided in some embodiments of the present application.

[0024] Reference numerals:

[0025] 100-Encapsulation equipment;

[0026] 10-supporting member; 20-clamping mechanism;

[0027] 11-supporting surface; 12-fixing member; 21-clamping portion; 22-driving assembly;

[0028] 211-cylinder; 212-gripper; 221-first drive unit; 222-second drive unit; 223-rotating motor;

[0029] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0032] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0033] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0035] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0036] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0039] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0040] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0041] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0042] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0043] As an example, the positive electrode current collector may be a metal foil or a composite current collector.

[0044] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0045] As an example, the negative electrode current collector may be a metal foil, a foamed metal, or a composite current collector.

[0046] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0047] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0048] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc.

[0049] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0050] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0051] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0052] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0053] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0054] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0055] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0056] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0057] In some embodiments, the housing may be provided with functional components such as electrode terminals, etc. The electrode terminals may be used to electrically connect to the electrode assembly to output or input electrical energy of the battery cell.

[0058] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in this application.

[0059] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0060] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0061] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0062] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0063] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0064] In the process of processing battery cells, it is usually necessary to wrap an insulating film onto the outer surface of an electrode assembly or a battery housing, which requires the use of a wrapping device. The wrapping device can wrap the insulating film once or multiple times, and during the wrapping process, the wrapping can be achieved by moving the insulating film and / or the wrapped object.

[0065] However, the existing coating equipment requires more steps and longer processing time during the coating process. In addition, since the insulating film is soft, it is prone to breakage or wrinkling, resulting in low processing efficiency and poor product yield.

[0066] In view of this, an embodiment of the present application provides a technical solution, which can improve processing efficiency by providing a driving component that provides freedom of movement in multiple directions.

[0067] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical equipment using batteries, such as mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys and electric tools, etc., wherein spacecrafts include airplanes, rockets, space shuttles and spacecraft, etc., electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and electric tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.

[0068] The battery cells described in the embodiments of the present application are not limited to the electrical equipment described above, but for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0069] Next, combine with Figure 1 To Attachment Figure 4 The structure of the coating device 100 will be described.

[0070] Please also read Figures 1 to 3 , Figure 1 A schematic diagram of the structure of the film coating device provided in some embodiments of the present application, Figure 2 A schematic diagram of the structure of a supporting member provided in some embodiments of the present application, Figure 3 A schematic diagram of the structure of the clamping mechanism provided in some embodiments of the present application.

[0071] In the first aspect, the present application provides a coating device 100, including a supporting member 10 and a clamping mechanism 20, the supporting member 10 is used to carry an insulating film and an electrode assembly; the clamping mechanism 20 includes a clamping portion 21 and a driving component 22, the clamping portion 21 is used to clamp the insulating film, and the driving component 22 is used to drive the clamping portion 21 to translate along a first direction X, translate along a second direction Y, and rotate, the rotation axis of the clamping portion 21 is parallel to a third direction Z, and the first direction X, the second direction Y, and the third direction Z are arranged to intersect each other.

[0072] The embodiment of the present application provides a coating device 100, which includes a support 10 for carrying a part to be processed and a clamping mechanism 20 for driving the film material to move. It is understandable that the following embodiments of the present application are described by applying the coating device 100 to the processing of battery cells as an example, but it should be understood that the coating device 100 provided in the embodiment of the present application is not limited to this, and can also be applied to other processing steps that require the surrounding coating material and provide protection.

[0073] Optionally, the support member 10 may be in the form of a tray structure with a relatively flat upper surface, used to support the electrode assembly and the insulating film. In order to facilitate the coating, when placing the aforementioned workpiece to be processed, the insulating film can be laid flat on the support member 10, and then the electrode assembly can be placed on the insulating film so that it covers part of the insulating film, that is, the bottom surface of the electrode assembly is first against the insulating film. Then, the insulating film can be folded and covered on the upper surface and side surface of the electrode assembly by the clamping mechanism 20 to complete the encircling of the insulating film, further improving the processing efficiency.

[0074] The clamping mechanism 20 further includes a clamping portion 21 and a driving assembly 22, wherein the clamping portion 21 is used to clamp and fix the insulating film to be coated, and the driving assembly 22 is used to drive the clamping portion 21 to move and rotate along a preset trajectory, thereby driving the insulating film to wrap the electrode assembly.

[0075] Specifically, the driving component 22 is used to drive the clamping portion 21 to move in the first direction X, to move in the second direction Y, and to drive the clamping portion 21 to rotate at least partially around the third direction Z as the rotation axis, wherein the first direction X can be selected as the length direction of the insulating film, that is, the direction in which the circumferential wrapping is required, the second direction Y can be selected as the vertical direction, and the third direction Z can be selected as the width direction of the insulating film, so that the clamping portion 21 can drive the insulating film to rise and fall and fold in the first direction X.

[0076] In the process of using the coating device 100 to wrap the insulating film around the electrode assembly, the insulating film and the electrode group can be first placed on the support member 10 according to the preset position, and then the clamping part 21 is moved to the position corresponding to the insulating film by the driving component 22, and the clamping part 21 is driven to clamp and fix the insulating film, and then the clamping part 21 is driven to rotate 90° to make the insulating film stand up. Then the clamping part 21 is driven to rotate 90° again, so that the insulating film is bent to be parallel to the partial area below the electrode assembly, and the clamping part 21 is driven to move along the first direction X, and the insulating film is dragged until its folded part is against the side of the electrode assembly. Then the clamping part 21 is driven to rotate 90° again and descend so that the insulating film fits the other side of the electrode assembly, and the end of the insulating film clamped by the clamping part 21 is optionally inserted under the electrode assembly to form a complete annular coating. During the film coating process, the position of the clamping part 21 can be flexibly adjusted by the driving component 22, and the travel distance in each direction after the clamping part 21 clamps the insulating film can be adjusted accordingly according to the size of the electrode assembly. By adjusting the difference between the moving size and the size of the electrode assembly to be coated, the tension of the wrapped insulating film can also be adjusted accordingly.

[0077] Optionally, after completing the step of bonding the insulating film to the last side edge of the electrode assembly, the clamping portion 21 may be loosened and reset to move it to an initial position or other position spaced apart from the electrode assembly and the insulating film, thereby reducing the possibility that the clamping mechanism 20 hinders subsequent process steps of the electrode assembly.

[0078] Optionally, when setting the clamping mechanism 20, the clamping portion 21 can also have the freedom of movement to extend and retract in the third direction Z, so as to facilitate the alignment of the clamping portion 21 and the insulating film and to separate the clamping portion 21 from the insulating model after the coating is completed.

[0079] In the technical solution of the embodiment of the present application, a supporting member 10 for carrying a battery cell and a clamping mechanism 20 for clamping and driving the insulating film to move are provided in the coating device 100, wherein the clamping mechanism 20 includes a clamping portion 21 and a driving component 22, and the driving component 22 can drive the clamping portion 21 to move in two different directions, and can also drive the clamping portion 21 to rotate around another direction, thereby being able to flexibly adjust the moving trajectory of the insulating film, and the insulating film can be wrapped independently and conveniently through the clamping mechanism 20, thereby reducing the process steps and processing time required for coating, thereby improving processing efficiency.

[0080] In some optional embodiments, the film coating device 100 includes a plurality of clamping mechanisms 20, and the plurality of clamping mechanisms 20 are respectively disposed on two opposite sides of the supporting member in the third direction Z.

[0081] Optionally, a plurality of clamping mechanisms 20 may be provided in the film coating device 100, and these clamping mechanisms 20 may be used to fix different positions of the insulating film, so as to facilitate folding the insulating film into a preset structural shape. Exemplarily, the plurality of clamping mechanisms 20 may be respectively provided on opposite sides of the support member, and during the film coating process, at least part of the plurality of clamping mechanisms 20 may be respectively clamped on opposite ends of the insulating film to tighten the insulating film, or at least part of the clamping mechanisms 20 may be clamped on opposite corners of the same end of the insulating film in the third direction Z, so as to make the insulating film more evenly stressed and facilitate the adjustment of the tension when coating the insulating film.

[0082] Optionally, each clamping mechanism 20 may have the same or similar structure, and can independently adjust the position and movement trajectory of the corresponding clamping portion 21 to make it more flexible. Through the coordinated action of multiple clamping mechanisms 20, the insulating film can be folded and moved more accurately and flexibly.

[0083] In some optional embodiments, in the third direction Z, a plurality of clamping mechanisms 20 are symmetrically arranged.

[0084] In an embodiment in which the coating device 100 includes a plurality of clamping mechanisms 20, the number of the clamping mechanisms 20 can be selected to be an even number and they are symmetrically arranged on both sides of the supporting member 10 along the third direction Z, and each pair of symmetrically arranged clamping mechanisms 20 can be selected to make the movement trajectory of their respective clamping portions 21 mirror-symmetrically arranged, so that the insulating film can move synchronously at two opposite positions in the third direction Z, further reducing the possibility of wrinkles or tilts on the insulating film.

[0085] Exemplarily, the film wrapping device 100 may include two clamping mechanisms 20, which are symmetrically arranged in the third direction Z and synchronously move and rotate their respective clamping parts 21, thereby being able to act on both side edges of the insulating film at the same time to facilitate folding.

[0086] By symmetrically arranging a plurality of clamping mechanisms 20, it is possible to improve the synchronization of the movement of each clamping portion 21 and reduce the possibility of wrinkling and tilting of the insulating film.

[0087] In some optional embodiments, the driving assembly 22 includes a first driving portion 221 and a second driving portion 222, the second driving portion 222 is movably connected to the first driving portion 221, and the second driving portion 222 can move along the first direction X relative to the first driving portion 221; the clamping portion 21 is movably connected to the second driving portion 222, and the clamping portion 21 can move along the second direction Y relative to the second driving portion 222.

[0088] Optionally, in order to enable the clamping portion 21 to have the freedom of movement in the first direction X and the second direction Y, the driving component 22 may include at least a first driving portion 221 and a second driving portion 222, wherein the second driving portion 222 is movably connected to the first driving portion 221, and the clamping portion 21 is movably connected to the second driving portion 222, thereby, the second driving portion 222 and the clamping portion 21 can move along the first direction X, and the clamping portion 21 can move alone along the second direction Y, and the desired movement function is achieved through the cooperation of the two driving portions.

[0089] Optionally, the first drive part 221 and the second drive part 222, and the second drive part 222 and the clamping part 21 may be connected in the same or different manners. For example, relative movement may be achieved by a telescopic rod, a rack and pinion assembly, a threaded screw, or a gear-track combination.

[0090] By providing the first driving part 221 and the second driving part 222 , the clamping part 21 can be moved in two directions in a convenient and concise manner, so that the coating device 100 is easy to operate.

[0091] In some optional embodiments, the first driving part 221 and the second driving part 222 are respectively provided with a first slide rail and a second slide rail, the second driving part 222 and the clamping part 21 are respectively provided with a first sliding part and a second sliding part, the first sliding part slides in cooperation with the first slide rail, and the second sliding part slides in cooperation with the second slide rail.

[0092] Optionally, in an embodiment where the driving component 22 includes a first driving part 221 and a second driving part 222, the two driving parts may be optionally provided with a first slide rail and a second slide rail, respectively, wherein the first slide rail extends along a first direction X and the second slide rail extends along a second direction Y. Correspondingly, the second driving part 222 and the clamping part 21 may be respectively provided with a first sliding part and a second sliding part, and the sliding part may be selected as a structural form such as a slider that matches the shape and size of the slide rail.

[0093] The first slide rail and the first sliding part are slidably matched with each other, and the second slide rail and the second sliding part are slidably matched with each other to achieve a corresponding sliding connection relationship. The slide rail and the sliding part can define the movement track of the second driving part 222 and the clamping part 21, so that the movement of the clamping part 21 in two directions is more stable, the possibility of shaking or offsetting during the movement is reduced, and the accuracy of the movement track is improved, thereby further improving the coating effect.

[0094] In some optional embodiments, the supporting member 10 has a supporting surface 11 , and a fixing member 12 is provided on one side of the supporting member 10 close to the supporting surface 11 . The fixing member 12 is at least partially located on one side of the supporting surface 11 in the second direction Y and is spaced apart from the supporting surface 11 .

[0095] The supporting member 10 in the coating device 100 is used to carry the electrode assembly and the insulating film, that is, before the coating process starts, the insulating film and the electrode assembly are at least partially placed on the supporting surface 11 of the supporting member 10. On this basis, a fixing member 12 can be provided on the side of the supporting member 10 close to the supporting surface 11. The fixing member 12 can be selected to have a certain gap with the supporting surface 11 at least partially, so that the insulating film and / or the electrode assembly can be partially clamped in the gap, thereby assisting in achieving the limitation of the insulating film and / or the electrode assembly in the second direction Y.

[0096] Optionally, the fixing member 12 may include a first part and a second part, wherein the first part may optionally extend along the second direction Y and be connected between the supporting member 10 and the second part, the second part may optionally extend along the first direction X, and the end of the second part may at least extend above the insulating film to make its structure simple and reliable.

[0097] By providing a fixing member 12 on one side close to the insulating film and the battery cell, the insulating film and / or the electrode assembly can be limited, the possibility of wrinkling and misalignment of the insulating film can be reduced, and the alignment accuracy of the clamping mechanism 20 and the insulating film and / or the electrode assembly can be improved.

[0098] In some optional embodiments, the fixing member 12 is located at one end of the supporting surface 11 in the first direction X, and the supporting member 10 is provided with a plurality of fixing members 12 , which are spaced apart along the third direction Z.

[0099] Optionally, in an embodiment in which a fixing member 12 is provided, a plurality of fixing members 12 may be provided on the supporting member 10 at the same time, and these fixing members 12 may be optionally all provided at one end of the supporting surface 11 in the first direction X.

[0100] As mentioned above, when the electrode assembly and the insulating film are placed on the supporting member 10, the electrode assembly can press part of the insulating film underneath, and the rest of the insulating film can be exposed to the outside, and the exposed part of the insulating film and the electrode assembly can be arranged along the first direction X, so as to fold the insulating film over the electrode assembly. On this basis, the fixing member 12 can be arranged at one end of the insulating film exposed to the outside in the first direction X, so as to fix the insulating film by clamping or the like.

[0101] Optionally, a plurality of fixing members 12 may be provided on the supporting member 10 at the same time. These fixing members 12 may be arranged at intervals along the third direction Z at the aforementioned end to further flatten the insulating film and reduce the possibility of the insulating film wrinkling or being unable to accurately align with the clamping mechanism 20.

[0102] In some optional embodiments, the film coating device 100 further includes a fixing member 12 , and the fixing member 12 is used to support the supporting member 10 , and the supporting member 10 and the fixing member 12 are detachably connected.

[0103] Optionally, the coating device 100 may further include a fixing member 12 for forming the supporting member 10. The fixing member 12 may be a supporting rod, a supporting beam or a supporting bracket, etc., as long as it can provide stable support. The supporting member 10 is arranged on the fixing member 12, and the relative position of the two may be relatively fixed, so as to facilitate the correction of the position of the supporting member 10. Alternatively, the fixing member 12 may be provided with a conveying structure, so as to facilitate the movement of the electrode assembly and the insulating film waiting to be processed materials between different processes, thereby improving the processing efficiency.

[0104] Optionally, the support member 10 and the fixing member 12 may be detachably connected. In the process of using the coating device 100 to process battery cells, the movement mode and movement size of the clamping portion 21 should be compatible with the size and wrapping mode of the electrode assembly, insulating film and other components to be processed. Similarly, in order to support and fix the workpiece to be processed, the size of the support member 10 can be selected to be compatible with it. The support member 10 is arranged to be detachably connected to the fixing member 12, which can facilitate the replacement of support members 10 of different sizes, so that the coating device 100 can be applied to the processing technology of battery cells of various sizes or models, thereby improving the applicability of the coating device 100.

[0105] See also Figure 4 , Figure 4 A schematic diagram of the structure of the clamping portion provided in some embodiments of the present application. In some optional embodiments, the driving assembly 22 includes a rotating motor 223, the clamping portion 21 is connected to the rotating motor 223, and the rotating motor 223 can drive the clamping portion 21 to rotate to a preset position.

[0106] Optionally, the driving component 22 may further include a rotating motor 223, which is used to realize the rotation of the clamping part 21. The rotating motor 223 may be a servo motor, which can control the speed and has high position accuracy. It can accurately convert the voltage signal into torque and rotation speed to drive the clamping part 21. By adopting a servo motor, the control accuracy of the rotation of the clamping part 21 can be further improved.

[0107] Optionally, in an embodiment where the driving component 22 includes a first driving part 221 and a second driving part 222, the rotating motor 223 can be connected between the second driving part 222 and the clamping part 21, so that the first driving part 221 and the second driving part 222 can respectively control the rotating motor to move in the first direction X and the second direction Y, and at the same time, the rotating motor 223 can control the rotation of the clamping part 21, thereby comprehensively realizing the control of the clamping part 21.

[0108] In some optional embodiments, the clamping portion 21 includes a cylinder 211 and two clamping jaws 212 disposed opposite to each other, and the cylinder 211 is used to drive the two clamping jaws 212 to open and close.

[0109] Optionally, since the insulating film is usually thin and has a certain strength, it will generate a certain stress after bending. In order to enable the clamping portion 21 to tighten the insulating film and make it conform to the shape of the wrapped electrode assembly more strictly, the clamping portion 21 can be optionally configured in the form of a clamping claw 212.

[0110] Specifically, the holding member may include two clamping jaws 212 disposed opposite to each other and a cylinder 211 for driving at least one of the clamping jaws 212 to move. At least one of the two clamping jaws 212 may move toward the other to compress and clamp the insulating film. The cylinder 211 may be used to drive the clamping jaws 212 to move. By providing the cylinder 211, it is convenient to adjust and maintain the clamping force between the two clamping jaws 212, so that the clamping of the insulating film is stable and reliable.

[0111] In some optional embodiments, a buffer layer is provided on one side of the two clamping jaws 212 close to each other.

[0112] In an embodiment in which two jaws 212 are provided, the jaws 212 may be optionally moved toward each other to close and clamp on both sides of the insulating film. Optionally, a buffer layer may be optionally provided at the clamping surfaces of the jaws 212 facing each other. The buffer layer may be optionally made of a material with a certain flexibility such as plastic, resin, rubber, etc., so that it has a certain elastic deformation space in the direction in which the jaws 212 are facing each other, thereby further stabilizing the clamping and reducing the possibility of the jaws 212 causing damage to the insulating film.

[0113] Optionally, the buffer layer may be connected to the main body of the clamp 212 by bonding, snapping, or by fasteners, etc., and the present application does not make any specific limitation on this.

[0114] In some optional embodiments, the coating device 100 further includes a controller, which is communicatively connected to the driving assembly 22 and the clamping portion 21 respectively.

[0115] Optionally, in order to facilitate the control of the processing process, the coating device 100 may further include a controller, which may include a human-machine interface for controlling the drive assembly 22 and the clamping portion 21, and may be used to display the processing status and processing time required by the coating device 100. The controller may be selectively connected to the drive assembly 22 and the clamping portion 21 for communication, that is, may be directly electrically connected through a signal line, or may be remotely transmitted through the cooperation of a signal transmitting module and a signal receiving module.

[0116] Optionally, the controller may be disposed at a support structure other than the clamping mechanism 20 and the supporting member 10 to reduce the possibility of interference with the various moving parts during operation and to facilitate timely operation.

[0117] By providing a controller, the movement and rotation of the clamping portion 21 can be easily controlled, thereby improving the accuracy of movement / rotation of the component during the coating process.

[0118] In some optional embodiments, the film coating device 100 further includes a hot press, which is disposed downstream of the clamping mechanism 20 and is used to weld the insulating film.

[0119] Optionally, the film coating device 100 may further include a hot press for the next process, which may be arranged downstream of the clamping mechanism 20 and used to connect and fix the insulating film that has been wrapped to a preset position. Specifically, the hot press may have a press head that can be heated, and during operation, the press head may be heated to a preset temperature, and then pressed at the position where the insulating film is to be connected, so that the insulating film is at least partially melted and connected to each other.

[0120] Optionally, the hot pressing part can be arranged adjacent to the clamping mechanism 20, so as to facilitate hot pressing and welding the insulating film without moving the supporting member 10. Alternatively, the hot pressing part can be arranged on one side of the clamping mechanism 20 in the first direction X, so as to facilitate moving the workpiece to be processed or the workpiece to be processed and the supporting member to a position convenient for the hot pressing process after the insulating film is encircled by the clamping mechanism 20.

[0121] By providing a hot pressing piece, a preset connection position on the insulating film can be welded, thereby allowing the insulating film to tightly and stably wrap the electrode assembly.

[0122] The embodiment of the present application provides a coating device 100, including a supporting member 10 and a clamping mechanism 20, the supporting member 10 is used to carry an insulating film and an electrode assembly; the clamping mechanism 20 includes a clamping portion 21 and a driving component 22, the clamping portion 21 is used to clamp the insulating film, the driving component 22 is used to drive the clamping portion 21 to translate along a first direction X, translate along a second direction Y, and rotate, the rotation axis of the clamping portion 21 is parallel to a third direction Z, and the first direction X, the second direction Y, and the third direction Z are arranged to intersect each other. The coating device 100 includes a plurality of clamping mechanisms 20, and the plurality of clamping mechanisms 20 are respectively arranged on opposite sides of the supporting member in the third direction Z.

[0123] The driving assembly 22 includes a first driving portion 221 and a second driving portion 222. The second driving portion 222 is movably connected to the first driving portion 221, and the second driving portion 222 can move relative to the first driving portion 221 along a first direction X; the clamping portion 21 is movably connected to the second driving portion 222, and the clamping portion 21 can move relative to the second driving portion 222 along a second direction Y. The driving assembly 22 also includes a rotating motor. The rotating motor 223 is connected between the second driving portion 222 and the clamping portion 21, and the rotating motor 223 can drive the clamping portion 21 to rotate to a preset position.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A coating device, characterized in that: include: A supporting member, used for supporting the insulating film and the electrode assembly; The clamping mechanism includes a clamping part and a driving component, wherein the clamping part is used to clamp the insulating film, and the driving component is used to drive the clamping part to translate along a first direction, translate along a second direction, and rotate. The rotating axis of the clamping part is parallel to a third direction, and the first direction, the second direction, and the third direction are arranged to intersect each other.

2. The coating device according to claim 1, characterized in that: The film coating device comprises a plurality of the clamping mechanisms, and the plurality of the clamping mechanisms are respectively arranged on two opposite sides of the supporting member in the third direction.

3. The coating device according to claim 2, characterized in that: In the third direction, a plurality of the clamping mechanisms are symmetrically arranged.

4. The coating device according to claim 1, characterized in that: The driving assembly comprises a first driving part and a second driving part, the second driving part is movably connected to the first driving part, and the second driving part can move along the first direction relative to the first driving part; The clamping portion is movably connected to the second driving portion, and the clamping portion can move along a second direction relative to the second driving portion.

5. The coating device according to claim 4, characterized in that: The first driving part and the second driving part are respectively provided with a first slide rail and a second slide rail, the second driving part and the clamping part are respectively provided with a first sliding part and a second sliding part, the first sliding part is slidably matched with the first slide rail, and the second sliding part is slidably matched with the second slide rail.

6. The coating device according to claim 1, characterized in that: The supporting member has a supporting surface. A fixing member is disposed on one side of the supporting member close to the supporting surface. The fixing member is at least partially located on one side of the supporting surface in the second direction and is spaced apart from the supporting surface.

7. The coating device according to claim 6, characterized in that: The fixing member is located at one end of the supporting surface in the first direction, and the supporting member is provided with a plurality of the fixing members, which are distributed at intervals along the third direction.

8. The coating device according to claim 1, characterized in that: The film coating device further comprises a fixing member, wherein the fixing member is used to support the supporting member, and the supporting member is detachably connected to the fixing member.

9. The coating device according to claim 1, characterized in that: The driving assembly includes a rotating motor, the clamping portion is connected to the rotating motor, and the rotating motor can drive the clamping portion to rotate to a preset position.

10. The coating device according to claim 9, characterized in that: The clamping part comprises a cylinder and two clamping jaws arranged opposite to each other, and the cylinder is used for driving the two clamping jaws to open and close.

11. The coating device according to claim 10, characterized in that: A buffer layer is respectively arranged on one side of the two clamping jaws close to each other.

12. The coating device according to claim 1, characterized in that: The film coating device further comprises a controller, which is communicatively connected with the driving assembly and the clamping part respectively.

13. The coating device according to claim 1, characterized in that: The film coating device further comprises a hot press, which is arranged downstream of the clamping mechanism and is used for welding the insulating film.

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