Coating device and battery production system

Abstract

The utility model discloses a coating device and a battery production system. The coating device comprises a coating die head and a cleaning part. And a discharge hole is formed in one side of the coating die head along the first direction. The cleaning part comprises a first cleaning part and a second cleaning part, the second cleaning part is arranged on at least one side, in the second direction, of the first cleaning part, part of the first cleaning part is configured to be inserted into the discharging opening, the second cleaning part is configured to abut against the end of the discharging opening, and the cleaning part is configured to move relative to the coating die head in the third direction; and the first cleaning piece is used for cleaning the discharging opening. The first cleaning part can scrape off particles clamped at the discharge port, so that slurry can uniformly flow out of the discharge port for coating during coating, and dry slurry at the end part of the discharge port is removed through the second cleaning part, so that the condition that the dry slurry falls off to the surface of the current collector during coating is reduced, and the coating quality is improved. And the probability that part of the slurry coated on the surface of the current collector is scraped off due to falling of the dry slurry is reduced, so that the uniformity of the coating thickness is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a battery manufacturing device, in particular to a coating device and a battery production system. BACKGROUND

[0002] In the process of battery production, it is necessary to form an active material layer by coating on the surface of the current collector. The coating die for coating the current collector is prone to be blocked by particles in the slurry at the discharge port during the coating process, and dry slurry exists at the end of the discharge port, which affects the uniformity of the coating thickness. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the present application provides a coating device and a battery production system, which can improve the cleaning effect of the discharge port and the end of the discharge port.

[0004] In a first aspect, the present application provides a coating device, comprising:

[0005] a coating die, the coating die being provided with a discharge port on one side along a first direction;

[0006] a cleaning component, comprising a first cleaning piece and a second cleaning piece, the first cleaning piece being provided with the second cleaning piece on at least one side along a second direction, part of the first cleaning piece being configured to be inserted into the discharge port, and the second cleaning piece being configured to abut against the end of the discharge port, the cleaning component being configured to be movable relative to the coating die along a third direction so as to clean the discharge port by the first cleaning piece and clean the end of the discharge port by the second cleaning piece, the first direction and the second direction intersecting, and the plane where the first direction and the second direction lie intersecting the third direction.

[0007] The first cleaning piece is inserted into the interior of the discharge port, and by driving the first cleaning piece to move along the third direction, the particles stuck at the discharge port can be scraped off, so that the slurry can flow out of the discharge port more uniformly for coating when the coating die is coating, and the dry slurry at the end of the discharge port is removed by the second cleaning piece, so as to reduce the situation that the dry slurry falls off to the surface of the current collector during the coating process, and reduce the probability that the dry slurry falling off scrapes off the part of the slurry coated on the surface of the current collector, thereby improving the uniformity of the coating thickness.

[0008] In some embodiments, the first cleaning piece comprises a first edge and a second edge, the first edge and the second edge being spaced apart along the third direction, the first cleaning piece having a first cross section perpendicular to the third direction and located between the first edge and the second edge, the size of the first edge to the first cross section along the third direction being W1, and the size of the second edge to the first cross section along the third direction being W2, at least one of W1 and W2 showing a decreasing trend along the insertion direction of the first cleaning piece.

[0009] When the first cleaning member moves to the limit position in the discharge port along the third direction, due to the distance between the first edge and the second edge and the first section decreasing, the first cleaning member is subjected to the force of the edge of the discharge port, generating a force in the opposite direction of the insertion direction, so that the first cleaning member retreats and slides out of the discharge port, reducing the local damage caused by the impact of the first cleaning member with the discharge port, and improving the service life of the first cleaning member.

[0010] In some embodiments, at least one of the first edge and the second edge is a straight edge.

[0011] When the first cleaning member exits the discharge port, the first cleaning member and the edge of the discharge port generate sliding friction, and since at least one of the first edge and the second edge is a straight edge, it is convenient to manufacture, and compared with a curved edge, the probability of jamming during the exit of the first cleaning member can be reduced.

[0012] In some embodiments, the cleaning component further comprises a resilient member and a seat member, the first cleaning member is slidably connected to the seat member along the first direction, one end of the resilient member abuts against the seat member, and the other end of the resilient member abuts against the first cleaning member, and the elastic force of the resilient member has a tendency to move the first cleaning member along the first direction towards the discharge port.

[0013] By providing the resilient member and the seat member, the first cleaning member can be slidably connected to the seat member along the first direction, and the elastic force of the resilient member tends to move the first cleaning member away from the seat member along the first direction. During cleaning, when the first cleaning member is inserted into the discharge port and encounters different degrees of resistance, such as uneven thickness of the slurry accumulation in the discharge port, particles of different sizes blocking, etc., the resilient member can adaptively adjust the position of the first cleaning member according to the resistance, so that the first cleaning member can better adapt to the actual conditions inside the discharge port for cleaning, to improve the cleaning effect.

[0014] In some embodiments, the first cleaning member comprises a first part and a second part, the first part is configured to be inserted into the discharge port, the second part is located outside the discharge port, and the side of the first part away from the second part has a recess structure.

[0015] During the movement of the first cleaning member along the third direction, the recess structure rubs against the particles stuck in the discharge port, making the particles more easily move in the recess structure, and thus removing the particles stuck in the discharge port, thereby improving the uniformity of the coating thickness.

[0016] In some embodiments, the coating device further comprises a driving mechanism, the driving mechanism is in transmission connection with the cleaning component, and the driving mechanism is used to drive the cleaning component to move along the third direction.

[0017] The driving mechanism is in transmission connection with the cleaning component and can drive the cleaning component to automatically move along the third direction to complete the cleaning work on the discharge port of the coating die and the end of the discharge port. Compared with the manual operation of the cleaning component, the automatic driving greatly reduces the labor input, improves the cleaning efficiency, shortens the time consumed by the whole cleaning process, and enables the coating die to be quickly put into the coating operation.

[0018] In some embodiments, the coating device further comprises an adapter, the adapter is in rotational connection with the coating die around the first axis, the first axis is the same as the third direction, and the driving mechanism is in adjustable connection with the adapter in the direction perpendicular to the first axis.

[0019] After the cleaning is completed, the driving mechanism can move relative to the coating die in the direction perpendicular to the first axis, so that the first cleaning component exits the discharge port, and then the adapter is rotated to flip the driving mechanism, so that the cleaning component moves out from the side opposite to the discharge port, so that the coating die can be put into work to coat the current collector. When there is a blockage in the discharge port or dry paste at the end of the discharge port, the coating operation can be paused, the driving mechanism is rotated to move the cleaning component to the position opposite to the discharge port, and then the driving mechanism is moved in the direction perpendicular to the first axis, so that the first cleaning component is inserted into the discharge port, and the second cleaning component abuts against the end of the discharge port to perform cleaning operation. Therefore, the driving mechanism can move relative to the coating die in the direction perpendicular to the first axis, the adapter is in rotational connection with the coating die around the first axis, the switching between coating and cleaning is facilitated, the working efficiency of the coating device is improved, the idle time of the equipment caused by the complicated switching process is reduced, and the production process is more smooth.

[0020] In some embodiments, the adapter is a telescopic piece, which can be telescoped in the direction perpendicular to the first axis; or the driving mechanism is in sliding connection with the adapter in the direction perpendicular to the first axis.

[0021] The adapter is a telescopic piece, or the driving mechanism is in sliding connection with the adapter in the direction perpendicular to the first axis, so that the first cleaning component can be more accurately inserted into the discharge port when switching to the cleaning mode, thereby reducing the probability that the first cleaning component deviates from the predetermined position and collides with the coating die during the insertion process, causing damage to the first cleaning component.

[0022] In some embodiments, the driving mechanism comprises:

[0023] a guide piece in sliding connection with the cleaning component along the third direction;

[0024] The transmission component is in transmission connection with the cleaning component, the guide member is arranged on the transmission component, the transmission component is connected with the adapter in a position-adjustable manner relative to the coating die in a direction perpendicular to the first axis, and the transmission component is arranged to be driven to drive the cleaning component to slide relative to the guide member in the third direction.

[0025] Since the discharge port of the coating die is relatively narrow, the guide member is in sliding connection with the cleaning component in the third direction, which provides a clear and fixed movement path for the movement of the cleaning component, reduces the deviation of the cleaning component from the preset trajectory, and thus reduces the occurrence of jamming during cleaning. Meanwhile, the guide member is arranged on the transmission component, so that the guide member can rotate with the transmission component relative to the coating die during the rotation of the driving mechanism relative to the coating die, so that the coating die can be quickly switched between the cleaning and working modes, and the working efficiency of the coating device is improved.

[0026] In some embodiments, the coating device further comprises a cleaning head arranged on at least one side of the second cleaning member in the third direction, and the cleaning head is used to spray cleaning liquid to the second cleaning member.

[0027] The cleaning head can spray cleaning liquid to the second cleaning member, and when the second cleaning member wipes the end of the discharge port, the cleaning liquid can better dissolve and flush away the slurry remaining on the end of the discharge port, so that the cleaning is more thorough and the uniformity of the coating thickness in the subsequent coating process is improved.

[0028] In some embodiments, the coating device further comprises a driving mechanism and an adapter, the driving mechanism is in transmission connection with the cleaning component, the driving mechanism is used to drive the cleaning component to move in the third direction, the adapter is rotatably connected with the coating die around the first axis, the first axis is the same as the third direction, the driving mechanism is connected with the adapter in a position-adjustable manner relative to the coating die in a direction perpendicular to the first axis, and the coating die is provided with a cleaning head on at least one side in the third direction, and the cleaning head is arranged on the driving mechanism.

[0029] During the switching of the coating device from the cleaning mode to the coating mode, the cleaning head can rotate with the driving mechanism relative to the coating die, so as to reduce the influence of the cleaning head on the coating during the coating process.

[0030] In some embodiments, the discharge port comprises a first discharge port and a second discharge port, and the first discharge port and the second discharge port are arranged at intervals in the second direction. The number of the first cleaning members is multiple, and a part of the number of the first cleaning members are used to clean the first discharge port, and another part of the number of the first cleaning members are used to clean the second discharge port.

[0031] For the coating die with the first discharge port and the second discharge port, a plurality of first cleaning members are arranged, and by driving the movement of the cleaning component, the first discharge port and the second discharge port can be cleaned at the same time, so as to improve the cleaning efficiency.

[0032] In a second aspect, the present application provides a battery production system including the coating device of the first aspect, the coating die being used to coat the paste to the surface of the current collector of the battery to form an active material layer on the surface of the current collector.

[0033] Since the battery production system includes all the technical features of the coating device of the first aspect, the effects are the same as described above, and will not be repeated here.

[0034] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application, and to implement it according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0035] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments, and are not meant to limit the present application. Moreover, the same reference numerals in all the drawings represent the same or similar elements. In the drawings:

[0036] Figure 1 is a first perspective view of a coating device according to an embodiment of the present application;

[0037] Figure 2 is a first perspective view of a coating device according to an embodiment of the present application; Figure 1 is a partial enlarged view of I of the coating device according to an embodiment of the present application;

[0038] Figure 3 is a second perspective view of a coating device according to an embodiment of the present application;

[0039] Figure 4 is a perspective view of a first cleaning member in a coating device according to an embodiment of the present application;

[0040] Figure 5 is a top view of a first cleaning member in a coating device according to an embodiment of the present application;

[0041] Figure 6 is a perspective view of a cleaning member in a coating device according to an embodiment of the present application;

[0042] Figure 7 is a structural view of a cleaning member in a coating device according to an embodiment of the present application;

[0043] Figure 8 is a sectional view of A-A of the coating device according to an embodiment of the present application. Figure 7

[0044] Reference numerals in the detailed description of the embodiments are as follows:

[0045] ​100, coating device;

[0046] 10, coating die; 11, discharge opening;

[0047] 20, cleaning member; 21, first cleaning element; 211, first portion; 212, second portion; 2111, first edge; 2112, second edge; 2113, recessed structure; 22, second cleaning element; 23, seat member; 231, guide hole; 24, elastic element;

[0048] 30, driving mechanism; 31, guide element; 32, transmission member; 321, transmission connecting element; 322, transmission wheel;

[0049] 40, adapter;

[0050] 50, cleaning head;

[0051] X, first direction; X1, insertion direction; Y, second direction; Z, third direction; P, first cross section. DETAILED DESCRIPTION

[0052] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0054] 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 "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0055] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0056] 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, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0057] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0058] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0059] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0060] In the process of producing a battery, it is necessary to form an active material layer by coating on the surface of the current collector. The coating die for coating the current collector is easy to be blocked by the particles in the slurry during the coating process, so that the discharge amount of the discharge port at different positions is different, and then the thickness consistency of the active material layer coated on the surface of the current collector is poor. At the same time, there is dry slurry at the end of the discharge port, and the gap between the end of the discharge port and the current collector affects the uniformity of the coating thickness.

[0061] In view of this, the application provides a coating device, a first cleaning member is inserted into the inside of the discharge port, by driving the first cleaning member to move along the third direction, the particles stuck at the discharge port can be scraped off, the slurry can be more uniformly discharged from the discharge port for coating when the coating die is coating, and the dry slurry at the end of the discharge port is removed by the second cleaning member, so as to reduce the situation that the dry slurry falls off to the surface of the current collector in the coating process, and reduce the probability that the dry slurry falls off and scrapes off the part of the slurry coated on the surface of the current collector, thereby improving the uniformity of the coating thickness.

[0062] The coating device provided by the application can be used for, but is not limited to, the coating of the current collector of a battery.

[0063] The following embodiments are for the convenience of illustration, please refer to Figures 1-8 A coating device 100 according to some embodiments of the application is taken as an example for description.

[0064] The coating device 100 comprises a coating die 10 and a cleaning member 20. The coating die 10 is provided with a discharge port 11 on one side along a first direction X. The cleaning member 20 comprises a first cleaning member 21 and a second cleaning member 22, the first cleaning member 21 is provided with the second cleaning member 22 on at least one side along a second direction Y, part of the first cleaning member 21 is configured to be inserted into the discharge port 11, and the second cleaning member 22 is configured to abut against the end of the discharge port 11. The cleaning member 20 is configured to be movable relative to the coating die 10 along a third direction Z, so that the first cleaning member 21 cleans the discharge port 11, and the second cleaning member 22 cleans the end of the discharge port 11. The first direction X and the second direction Y intersect, and the plane where the first direction X and the second direction Y are located intersects the third direction Z.

[0065] The first cleaning member 21 can be a cleaning sheet, so that the first cleaning member 21 can be inserted into the narrow discharge port 11.

[0066] The second cleaning member 22 can be, but is not limited to, a cleaning cloth or cleaning cotton, etc.

[0067] The first cleaning member 21 and the second cleaning member 22 can be fixed by adhesion, screw connection or clamping member.

[0068] The first cleaning member 21 is inserted into the inside of the discharge port 11, by driving the first cleaning member 21 to move along the third direction Z, the particles stuck at the discharge port 11 can be scraped off, the slurry can be more uniformly discharged from the discharge port 11 for coating when the coating die 10 is coating, and the dry slurry at the end of the discharge port 11 is removed by the second cleaning member 22, so as to reduce the situation that the dry slurry falls off to the surface of the current collector in the coating process, and reduce the probability that the dry slurry falls off and scrapes off the part of the slurry coated on the surface of the current collector, thereby improving the uniformity of the coating thickness.

[0069] In some embodiments, please refer to Figure 4 and Figure 5 The first cleaning element 21 includes a first edge 2111 and a second edge 2112. The first edge 2111 and the second edge 2112 are spaced apart along the third direction Z. The first cleaning element 21 has a first cross section P, which is perpendicular to the third direction Z and located between the first edge 2111 and the second edge 2112. The dimension of the first edge 2111 along the third direction Z to the first cross section P is W1, and the dimension of the second edge 2112 along the third direction Z to the first cross section P is W2. Along the insertion direction X1 of the first cleaning element 21, at least one of W1 and W2 decreases.

[0070] Both the first edge 2111 and the second edge 2112 can be concave arc-shaped edges, convex arc-shaped edges, or straight edges.

[0071] When the first cleaning component 21 moves to its limit position within the discharge port 11 along the third direction Z, since the distance from at least one of the first edge 2111 and the second edge 2112 to the first cross section P decreases, the first cleaning component 21 is subjected to the force of the edge of the discharge port 11, generating an opposite force along the insertion direction X1, causing the first cleaning component 21 to retract and slide out of the discharge port 11, thereby reducing the local damage caused by the collision between the first cleaning component 21 and the discharge port 11 and improving the service life of the first cleaning component 21.

[0072] In some embodiments, please refer to Figure 4 and Figure 5 At least one of the first edge 2111 and the second edge 2112 is a straight edge.

[0073] When the first cleaning component 21 exits from the discharge port 11, sliding friction occurs between the first cleaning component 21 and the edge of the discharge port 11. Since at least one of the first edge 2111 and the second edge 2112 is a straight edge, it is easy to process and manufacture. Compared with the edge being a curved edge, the probability of jamming can be reduced during the exit of the first cleaning component 21.

[0074] In some embodiments, please refer to Figures 6-8 The cleaning component 20 also includes an elastic element 24 and a seat component 23. The first cleaning component 21 is slidably connected to the seat component 23 along the first direction X. One end of the elastic element 24 abuts against the seat component 23, and the other end of the elastic element 24 abuts against the first cleaning component 21. The elastic force of the elastic element 24 has a tendency to move the first cleaning component 21 toward the discharge port 11 along the first direction X.

[0075] The base component 23 can be a single piece or an integral part formed by fixing and connecting multiple pieces.

[0076] The elastic element 24 can be, but is not limited to, a spring or a sheet, such as a compression spring.

[0077] As an example, the second cleaning component 22 is connected to the seat component 23, specifically by adhesive bonding or screw connection. The seat component 23 is provided with the second cleaning component 22 on both sides along the second direction Y.

[0078] As an example, the first cleaning component 21 has a first part 211 and a second part 212, which are connected, specifically by welding, bonding, screw connection, or integral molding. The second part 212 is slidably connected to the seat component 23 along a first direction X. Specifically, the seat component 23 has a guide groove extending along the first direction X, and the second part 212 slides in conjunction with the guide groove along the first direction X. The end of the second part 212 facing away from the first part 211 is limited in conjunction with the seat component 23 to restrict the movement distance of the second part 212 along the first direction X. The elastic element 24 can be a compression spring, which is sleeved on the second part 212. One end of the compression spring abuts against the second part 212, and the other end abuts against the seat component 23. The compression spring can also be replaced by a spring sheet, one end of which is connected to the second part 212, and the other end of which is connected to the seat component 23. The seat component 23 can be configured with a cavity structure, and the compression spring can be disposed within the cavity.

[0079] By setting the elastic element 24 and the seat component 23, the first cleaning element 21 can be slidably connected to the seat component 23 along the first direction X, and the elastic force of the elastic element 24 causes the first cleaning element 21 to tend to move away from the seat component 23 along the first direction X. During the cleaning process, when the first cleaning element 21 encounters different degrees of resistance when it is inserted into the discharge port 11, such as uneven thickness of slurry accumulation in the discharge port 11 or blockage by particles of different sizes, the elastic element 24 can adaptively adjust the position of the first cleaning element 21 according to the magnitude of the resistance, so that the first cleaning element 21 can better adapt to the actual conditions inside the discharge port 11 for cleaning, thereby improving the cleaning effect.

[0080] In some embodiments, please refer to Figure 4 and Figure 5 The first cleaning component 21 includes a first part 211 and a second part 212. The first part 211 is configured to be inserted into the discharge port 11, and the second part 212 is located outside the discharge port 11. The side of the first part 211 opposite to the second part 212 has a recessed structure 2113.

[0081] The outline of the recessed structure 2113 can be an arc or a curve formed by any two or three of the following: arc, partial ellipse and partial circular arc. It can also be an outline formed by the intersection of multiple straight lines. This application does not make any specific limitation.

[0082] As the first cleaning component 21 moves along the third direction Z, the recessed structure 2113 rubs against the particles stuck in the discharge port 11, making it easier for the particles to move within the recessed structure 2113, thereby removing the particles stuck in the discharge port 11 and improving the uniformity of the coating thickness.

[0083] In some embodiments, please refer to Figures 1-3 The coating apparatus 100 also includes a drive mechanism 30, which is connected to the cleaning component 20 in a transmission manner. The drive mechanism 30 is used to drive the cleaning component 20 to move along a third direction Z.

[0084] The drive mechanism 30 can be an electric push rod, which is connected to the cleaning component 20 to drive the cleaning component 20 to move relative to the coating die head 10 in the third direction Z. In other examples, the drive mechanism 30 may also include a transmission component 32 and a motor. The rotation of the motor transmits power to the cleaning component 20 through the transmission component 32, causing the cleaning component 20 to move relative to the seat component 23 in the third direction Z.

[0085] The drive mechanism 30 is connected to the cleaning component 20 and can drive the cleaning component 20 to move automatically along the third direction Z to complete the cleaning work of the discharge port 11 and the end of the discharge port 11 of the coating die head 10. Compared with the manual operation of the cleaning component 20, the automated drive greatly reduces the manpower input, improves the cleaning efficiency, and shortens the time spent in the entire cleaning process, so that the coating die head 10 can be put into the coating operation more quickly.

[0086] In some embodiments, please refer to Figures 1-3 The coating apparatus 100 also includes an adapter 40, which is rotatably connected to the coating die head 10 around a first axis. The first axis is the same as the third direction Z. Along the direction perpendicular to the first axis, the drive mechanism 30 is connected to the adapter 40 in a position adjustable relative to the coating die head 10.

[0087] The adapter 40 can be, but is not limited to, a rod-shaped structure.

[0088] After cleaning, the drive mechanism 30 can move relative to the coating die head 10 in a direction perpendicular to the first axis, causing the first cleaning component 21 to exit from the outlet 11. Then, the adapter 40 is rotated to flip the drive mechanism 30, causing the cleaning component 20 to move out from the side opposite to the outlet 11, so that the coating die head 10 can be put into operation to coat the collector. When a blockage occurs in the outlet 11 or dry slurry appears at the end of the outlet 11, the coating operation can be paused. By rotating the drive mechanism 30, the cleaning component 20 is moved to a position opposite to the outlet 11. Then, the drive mechanism 30 is moved in a direction perpendicular to the first axis, causing the first cleaning component 21 to be inserted into the outlet 11, and the second cleaning component 22 to abut against the end of the outlet 11 to perform the cleaning operation. Therefore, the drive mechanism 30 can move relative to the coating die head 10 in a direction perpendicular to the first axis, and the adapter 40 is rotatably connected to the coating die head 10 around the first axis, which facilitates the switching between coating and cleaning, improves the working efficiency of the coating device 100, reduces the idle time of the equipment due to the cumbersome switching process, and makes the production process smoother.

[0089] In some embodiments, the adapter 40 is a telescopic member capable of extending and retracting in a direction perpendicular to the first axis; or, the drive mechanism 30 is slidably connected to the adapter 40 in a direction perpendicular to the first axis.

[0090] The telescopic component can be a telescopic rod or a telescopic slide rail.

[0091] As an example, the drive mechanism 30 includes a mounting base along a direction perpendicular to the first axis. The positionally adjustable connection between the mounting base and the adapter 40 can be achieved via a slide rail and slider structure. A slide rail is mounted on the adapter 40, and the mounting base engages with the slide rail via a slider, which is equipped with a fastening bolt. When the vertical position of the drive mechanism 30 needs adjustment, the fastening bolt is loosened, the drive mechanism 30 is pushed along the slide rail to the desired position, and then the bolt is tightened to achieve the position adjustment.

[0092] The adapter 40 is a telescopic component, or the drive mechanism 30 is slidably connected to the adapter 40 in a direction perpendicular to the first axis. When switching to the cleaning mode, the first cleaning component 21 can be inserted into the discharge port 11 more accurately, so as to reduce the probability that the first cleaning component 21 will deviate from the predetermined position during the insertion process and hit the coating die head 10, causing damage to the first cleaning component 21.

[0093] In some embodiments, please refer to Figures 1-3The drive mechanism 30 includes a guide member 31 and a transmission component 32. The guide member 31 is slidably connected to the cleaning component 20 along a third direction Z. The transmission component 32 is drively connected to the cleaning component 20. The guide member 31 is disposed on the transmission component 32 along a direction perpendicular to the first axis. The transmission component 32 is connected to the adapter 40 in a position adjustable relative to the coating die head 10. The transmission component 32 is configured to be driven so that the cleaning component 20 slides relative to the guide member 31 along a third direction Z.

[0094] The transmission component 32 can be, but is not limited to, a ball screw mechanism, a belt drive mechanism, or a sprocket drive mechanism.

[0095] The guide member 31 has a guide structure along the third direction Z. The guide structure can be a guide protrusion, a guide groove, a guide rail, or a guide rod, etc. As an example, the guide member 31 is a guide rod extending along the third direction Z. The seat member 23 is provided with a guide hole 231, which passes through both ends of the seat member 23 along the third direction Z. The guide rod slides in conjunction with the guide hole 231.

[0096] As an example, the drive mechanism 30 also includes a motor, and the transmission component 32 includes a transmission connector 321 and two transmission wheels 322. The two transmission wheels 322 are spaced apart along a first direction X. The transmission connector 321 is wound around the two transmission wheels 322. At least one transmission wheel 322 is driven to the motor shaft of the motor through a bushing. The guide 31 is rotatably connected to the bushing, so that the guide 31 can remain stationary when the bushing rotates. In other examples, the drive mechanism 30 also includes a support base. Each transmission wheel 322 is rotatably connected to the support base. The motor shaft is driven to the transmission wheel 322, and the guide 31 is disposed on the support base, specifically connected to the support base by screws or welding. The transmission connector 321 can be a transmission belt or a chain. If the transmission connector 321 is a transmission belt, it can be fixedly connected to the seat component 23 by screws or adhesive.

[0097] Because the outlet 11 of the coating die head 10 is relatively narrow, the guide member 31 is slidably connected to the cleaning member 20 along the third direction Z, providing a clear and fixed movement path for the cleaning member 20, reducing the possibility of the cleaning member 20 deviating from the preset trajectory, thereby reducing the possibility of jamming during the cleaning process; at the same time, by setting the guide member 31 on the transmission member 32, during the rotation of the drive mechanism 30 relative to the coating die head 10, the guide member 31 can rotate together with the transmission member 32 relative to the coating die head, so that the coating die head 10 can quickly switch between the cleaning and working modes, improving the working efficiency of the coating device 100.

[0098] In some embodiments, please refer to Figure 2The coating apparatus 100 also includes a cleaning head 50, and the second cleaning member 22 is provided with the cleaning head 50 on at least one side along the third direction Z. The cleaning head 50 is used to spray cleaning liquid onto the second cleaning member 22.

[0099] As an example, the cleaning head 50 may be disposed on the base member 23 so that the cleaning head 50 may move together with the cleaning component 20 along a third direction Z.

[0100] The cleaning head 50 can be connected to a pipeline containing cleaning fluid. The pipeline is equipped with a pump and an on / off valve, which is used to open and close the pipeline so that the cleaning head 50 can spray cleaning fluid onto the second cleaning component 22.

[0101] The cleaning solution can be, but is not limited to, water, alcohol, or other solvents that dissolve slurries, depending on the composition of the slurry.

[0102] The cleaning head 50 can spray cleaning fluid onto the second cleaning component 22. When the second cleaning component 22 wipes and cleans the end of the outlet 11, the cleaning fluid can better dissolve and rinse away the slurry remaining at the end of the outlet 11, making the cleaning more thorough and improving the uniformity of the coating thickness in the subsequent coating process.

[0103] In some embodiments, please refer to Figure 1 and Figure 2 The coating die head 10 has a cleaning head 50 on at least one side along the third direction Z, and the cleaning head 50 is disposed on the drive mechanism 30.

[0104] As an example, the cleaning head 50 can be mounted on the aforementioned support base, or it can be fixed to the aforementioned motor by adhesive bonding.

[0105] During the switching process from cleaning mode to coating mode, the cleaning head 50 can rotate relative to the coating die head 10 along with the drive mechanism 30 to reduce the impact of the cleaning head 50 on the coating process.

[0106] In some embodiments, the discharge port 11 includes a first discharge port 11 and a second discharge port 11. The first discharge port 11 and the second discharge port 11 are arranged at intervals along the second direction Y. The number of first cleaning members 21 is multiple. A portion of the first cleaning members 21 are used to clean the first discharge port 11, and another portion of the first cleaning members 21 are used to clean the second discharge port 11.

[0107] As an example, there are two first cleaning components 21, one of which is used to clean the particles blocked in the first discharge port 11, and the other is used to clean the particles blocked in the second discharge port 11.

[0108] For a coating die head 10 having a first discharge port 11 and a second discharge port 11, a plurality of first cleaning components 21 are provided. By driving the movement of the cleaning components 20, the first discharge port 11 and the second discharge port 11 can be cleaned simultaneously to improve cleaning efficiency.

[0109] For ease of explanation, the following embodiments use a battery production system from some embodiments of this application as an example.

[0110] The battery production system includes the coating apparatus 100 of the above embodiment, and the coating die 10 is used to coat the surface of the current collector of the battery with a slurry so that an active material layer is formed on the surface of the current collector.

[0111] Since the battery production system includes all the technical features of the coating apparatus 100 in the above embodiments, the effect is the same as described above, and will not be repeated here.

[0112] In an optional embodiment of the coating apparatus 100, the coating apparatus 100 includes a coating die 10 and a cleaning component 20. The coating die 10 has a discharge port 11 on one side along a first direction X. The cleaning component 20 includes a first cleaning element 21 and a second cleaning element 22. The first cleaning element 21 has second cleaning elements 22 on both sides along a second direction Y. A portion of the first cleaning element 21 is configured to be inserted into the discharge port 11, and the second cleaning element 22 is configured to abut against the end of the discharge port 11. The cleaning component 20 is configured to move relative to the coating die 10 along a third direction Z, so that the first cleaning element 21 cleans the discharge port 11 and the second cleaning element 22 cleans the end of the discharge port 11. The first direction X and the second direction Y intersect, and the plane containing the first direction X and the second direction Y intersects with the third direction Z. The first cleaning element 21 includes a first edge 2111 and a second edge 2112, which are spaced apart along a third direction Z. The first cleaning element 21 has a first cross section P, which is perpendicular to the third direction Z and located between the first edge 2111 and the second edge 2112. The dimension of the first edge 2111 along the third direction Z to the first cross section P is W1, and the dimension of the second edge 2112 along the third direction Z to the first cross section P is W2. Along the insertion direction X1 of the first cleaning element 21, at least one of W1 and W2 decreases, and both the first edge 2111 and the second edge 2112 are straight edges. The cleaning component 20 also includes an elastic element 24 and a seat member 23. The first cleaning component 21 is slidably connected to the seat member 23 along a first direction X. One end of the elastic element 24 abuts against the seat member 23, and the other end of the elastic element 24 abuts against the first cleaning component 21. The elastic force of the elastic element 24 has a tendency to move the first cleaning component 21 towards the discharge port 11 along the first direction X. The first cleaning component 21 includes a first part 211 and a second part 212. The first part 211 is configured to be inserted into the discharge port 11, and the second part 212 is located outside the discharge port 11. The side of the first part 211 facing away from the second part 212 has a recessed structure 2113. The coating apparatus 100 also includes a drive mechanism 30 and an adapter 40. The drive mechanism 30 is drively connected to the cleaning component 20 and is used to drive the cleaning component 20 to move along a third direction Z. The adapter 40 is rotatably connected to the coating die 10 around a first axis, which is the same as the third direction Z. Along a direction perpendicular to the first axis, the drive mechanism 30 is connected to the adapter 40 in a position adjustable relative to the coating die 10. The adapter 40 is a telescopic component, capable of extending and retracting along a direction perpendicular to the first axis. The discharge port 11 includes a first discharge port 11 and a second discharge port 11, spaced apart along a second direction Y. There are two first cleaning components 21: one for cleaning the first discharge port 11 and the other for cleaning the second discharge port 11.The coating die head 10 is provided with cleaning heads 50 on both sides along the third direction Z, and the cleaning heads 50 are disposed on the drive mechanism 30.

[0113] The first cleaning component 21 is inserted into the discharge port 11. By driving the first cleaning component 21 to move along the third direction Z, the first cleaning component 21 has a concave edge 2223, which can scrape off particles stuck at the discharge port 11, so that the slurry can flow out from the discharge port 11 more evenly during coating by the coating die head 10. The second cleaning component 22 removes the dry slurry at the end of the discharge port 11, thereby reducing the occurrence of dry slurry falling onto the surface of the collector during the coating process and reducing the probability of dry slurry falling off and scraping off part of the slurry coated on the surface of the collector, thereby improving the uniformity of the coating thickness. At the same time, the drive mechanism 30 rotates relative to the coating die head 10, which enables the coating die head 10 to quickly switch between cleaning mode and working mode, thereby improving the working efficiency of the coating device 100.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not 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 modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A coating apparatus, characterized in that, include: A coating die head, wherein the coating die head has a discharge port on one side along a first direction; A cleaning component includes a first cleaning element and a second cleaning element. The first cleaning element has the second cleaning element disposed on at least one side along a second direction. A portion of the first cleaning element is configured to be inserted into the discharge port. The second cleaning element is configured to abut against the end of the discharge port. The cleaning component is configured to be movable relative to the coating die head along a third direction, so that the first cleaning element cleans the discharge port and the second cleaning element cleans the end of the discharge port. The first direction and the second direction intersect, and the plane containing the first direction and the second direction intersects with the third direction.

2. The coating apparatus according to claim 1, characterized in that, The first cleaning component includes a first edge and a second edge, which are spaced apart along the third direction. The first cleaning component has a first cross section, which is perpendicular to the third direction and located between the first edge and the second edge. The dimension of the first edge along the third direction to the first cross section is W1, and the dimension of the second edge along the third direction to the first cross section is W2. At least one of W1 and W2 decreases along the insertion direction of the first cleaning component.

3. The coating apparatus according to claim 2, characterized in that, At least one of the first edge and the second edge is a straight edge.

4. The coating apparatus according to claim 2, characterized in that, The cleaning component further includes an elastic element and a seat component. The first cleaning component is slidably connected to the seat component along the first direction. One end of the elastic element abuts against the seat component, and the other end of the elastic element abuts against the first cleaning component. The elastic force of the elastic element has a tendency to cause the first cleaning component to move toward the discharge port along the first direction.

5. The coating apparatus according to claim 1, characterized in that, The first cleaning component includes a first part and a second part, the first part being configured to be inserted into the discharge port, the second part being located outside the discharge port, and the first part having a recessed structure on the side opposite to the second part.

6. The coating apparatus according to any one of claims 1-5, characterized in that, The coating apparatus further includes a drive mechanism, which is connected to the cleaning component and is used to drive the cleaning component to move along the third direction.

7. The coating apparatus according to claim 6, characterized in that, The coating apparatus further includes an adapter, which is rotatably connected to the coating die head about a first axis. The first axis is the same as the third axis and is perpendicular to the first axis. The drive mechanism is connected to the adapter in a position adjustable relative to the coating die head.

8. The coating apparatus according to claim 7, characterized in that, The adapter is a telescopic component that can extend and retract in a direction perpendicular to the first axis; or, the drive mechanism is slidably connected to the adapter in a direction perpendicular to the first axis.

9. The coating apparatus according to claim 7, characterized in that, The drive mechanism includes: The guide member is slidably connected to the cleaning component along the third direction; A transmission component is connected to the cleaning component in a transmission manner. The guide is disposed on the transmission component in a direction perpendicular to the first axis. The transmission component is connected to the adapter in a manner that is adjustable relative to the coating die head. The transmission component is configured to be driven so that the cleaning component slides relative to the guide in the third direction.

10. The coating apparatus according to any one of claims 1-5, characterized in that, The coating apparatus further includes a cleaning head, which is provided on at least one side of the second cleaning component along the third direction, and the cleaning head is used to spray cleaning liquid onto the second cleaning component.

11. The coating apparatus according to claim 10, characterized in that, The coating apparatus further includes a drive mechanism and an adapter. The drive mechanism is drively connected to the cleaning component and is used to drive the cleaning component to move along the third direction. The adapter is rotatably connected to the coating die head about a first axis. The first axis is the same as the third direction. Along a direction perpendicular to the first axis, the drive mechanism is connected to the adapter in a position adjustable relative to the coating die head. The coating die head is provided with the cleaning head on at least one side along the third direction, and the cleaning head is disposed on the drive mechanism.

12. The coating apparatus according to any one of claims 1-5, characterized in that, The discharge port includes a first discharge port and a second discharge port. Along the second direction, the first discharge port and the second discharge port are spaced apart. The number of the first cleaning components is multiple. A portion of the first cleaning components are used to clean the first discharge port, and another portion of the first cleaning components are used to clean the second discharge port.

13. A battery production system, characterized in that, The apparatus includes a coating device as described in any one of claims 1-12, wherein the coating die is used to coat a slurry onto the surface of the current collector of the battery to form an active material layer on the surface of the current collector.

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