Battery production system and coating device

Abstract

The utility model relates to the technical field of battery production, in particular to a battery production system and a coating device. The battery production system comprises a coating device and a coating roller, the coating device comprises a material groove and a stirring assembly, a material storage cavity used for storing slurry is formed in the material groove, the stirring assembly comprises a driving part and a stirring part connected with the output end of the driving part, and the driving part is used for driving the stirring part to move in the material storage cavity; at least part of the coating roller is arranged in the material storage cavity and used for coating the base material with the slurry in the material storage cavity. According to the battery production system, the coating roller is arranged in the material storage cavity and used for coating the base material with the slurry in the material storage cavity, so that coating of the base material is achieved, in the coating process of the base material, the driving part can drive the stirring part to move in the material storage cavity, and therefore the slurry in the material storage cavity is driven to move through movement of the stirring part; and the flocculation phenomenon caused by standing of the slurry is reduced, so that the continuous coating process of the base material is realized.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a battery manufacturing system and coating apparatus. Background Technology

[0002] Currently, the production of electrodes for lithium iron phosphate batteries typically involves coating a substrate (aluminum foil) with conductive carbon to increase the electrode's conductivity. This coating process generally employs gravure coating. Gravure coating involves partially immersing a single coating roller (gravure roller) wrapped with a substrate into a slurry bath. The coating roller and the substrate rotate at a specific speed to coat the slurry from the bath onto the electrode sheet. During gravure coating, some of the slurry in the bath may flocculate due to settling, leading to increased viscosity and making continuous coating impossible. This results in the slurry in the bath becoming unusable and requiring replacement before coating can begin again, thus impacting electrode production efficiency. Utility Model Content

[0003] In view of the deficiencies of the prior art, the purpose of this application is to provide a battery production system and coating device that can effectively solve the problem of slurry flocculation during the gravure coating process.

[0004] The first aspect of this application discloses a battery manufacturing system, including:

[0005] A coating apparatus includes a trough and a mixing assembly. The trough has a storage cavity for storing slurry. The mixing assembly includes a drive and a mixing element connected to the output end of the drive. The drive is used to drive the mixing element to move within the storage cavity.

[0006] A coating roller, at least part of which is disposed within a storage chamber, is used to coat the slurry in the storage chamber onto a substrate.

[0007] According to the battery production system of this application, a coating roller is disposed in a storage chamber and is used to coat the slurry in the storage chamber onto the substrate, thereby achieving coating of the substrate. During the coating process of the substrate, the driving component can drive the stirring component to move in the storage chamber, thereby driving the slurry in the storage chamber to move through the movement of the stirring component, reducing flocculation caused by the static standing of the slurry, reducing the viscosity of the slurry, and thus achieving a continuous coating process for the substrate.

[0008] In some embodiments of this application, the stirring assembly further includes a mounting base and a first connecting member. The mounting base is located inside the material trough and connected to the material trough. The first connecting member is rotatably connected to the mounting base. The main body of the driving member is located outside the material trough. The output end of the driving member is inserted into the storage cavity and drives the stirring member to rotate through the first connecting member.

[0009] The output end of the drive unit can be connected to the agitator through the first connector, thereby driving the agitator to rotate and agitate the slurry in the storage chamber. At the same time, the agitator can also be connected to the mounting base through the first connector, thereby connecting to the trough and being placed inside the trough.

[0010] In some embodiments of this application, the stirring member includes a blade portion and a support portion. The two ends of the support portion along its own axial direction are respectively connected to the driving member and the blade portion. The driving member is used to drive the support portion to rotate around its own axial direction. At least a portion of the blade portion is set at an angle to the support portion and is capable of rotating around the axial direction of the support portion.

[0011] Since the blade section and the support section are set at an angle and can rotate around the axis of the support section, when the drive component drives the support section to rotate around its own axis, the blade section can also rotate around the axis of the support section and drive the slurry in the storage chamber to move, thereby achieving the function of stirring the slurry.

[0012] In some embodiments of this application, the blade portion includes a first connecting portion and a second connecting portion. The first connecting portion includes a first end and a second end disposed opposite to each other. The first end is connected to the support portion, and the second end is disposed on the side of the first end near the drive member and spaced apart from the support portion. The second connecting portion is connected to the second end and is spaced apart from the support portion.

[0013] By placing the second end of the first connecting part on the side of the first end close to the driving member and spaced apart from the support part, the first connecting part and the support part are arranged at an acute angle, which increases the force of the stirring member in the direction perpendicular to the axial direction of the support part, thereby increasing the fluidity of the slurry in the storage chamber. At the same time, the second connecting part is connected to the second end and is spaced apart from the support part, so that during the rotation of the second connecting part around the axial direction of the support part, the slurry can be driven to move in the direction parallel to the axial direction of the support part, thereby driving the slurry in the range of the direction parallel to the axial direction of the support part to move together.

[0014] In some embodiments of this application, the material trough includes a bottom plate and side plates disposed around the edge of the bottom plate. The bottom plate and the side plates together form a material storage cavity. The output end of the drive unit passes through the bottom plate and is connected to the agitator.

[0015] By passing the output end of the drive unit through the base plate and connecting it to the agitator, the agitator can be inserted into the slurry along the depth direction of the storage chamber, thereby agitating the slurry in the depth direction of the storage chamber and reducing the flocculation phenomenon of the slurry at the bottom of the storage chamber.

[0016] In some embodiments of this application, the top of the storage chamber is provided with an opening, and the coating device also includes a baffle plate. The baffle plate is located on the side of the agitator facing the opening, and along the direction from the agitator to the baffle plate, the projection of the agitator in the plane where the baffle plate is located at least partially coincides with the baffle plate.

[0017] Since one end of the storage chamber has an opening, in order to reduce the splashing of slurry to the outside of the storage chamber during the mixing process of the agitator, a baffle plate is set on the side of the agitator facing the opening and is used to block the slurry.

[0018] In some embodiments of this application, the surface of the baffle plate facing the agitator is provided with protrusions or grooves.

[0019] By providing protrusions or grooves on the surface of the baffle plate facing the agitator, some of the slurry can come into contact with the protrusions or grooves on the baffle plate during its movement toward the opening, thereby slowing down the flow rate of the slurry along the surface of the baffle plate and reducing the amount of slurry flowing out of the storage chamber in a direction parallel to the surface of the baffle plate.

[0020] In some embodiments of this application, the baffle is connected to the trough, and the top of the agitator is rotatably connected to the baffle.

[0021] The top of the agitator is rotatably connected to the baffle plate, which supports the top of the agitator, thereby improving the stability of the agitator during rotation and reducing deformation caused by the resistance of the slurry.

[0022] In some embodiments of this application, the coating apparatus includes a plurality of driving members and a plurality of stirring members, the number of driving members and the number of stirring members being the same, and the plurality of driving members and the plurality of stirring members being connected one-to-one to form a plurality of stirring assemblies; or, the coating apparatus includes at least one driving member and a plurality of stirring members, the number of driving members being less than the number of stirring members, and at least two stirring members being connected to the same driving member to form a stirring assembly.

[0023] Multiple driving components and multiple stirring components are connected one-to-one to form multiple stirring assemblies. These assemblies can then separately stir the slurry at different locations within the storage chamber, thereby reducing flocculation. Alternatively, at least two stirring components can be connected to the same driving component to form a stirring assembly. One driving component can drive two stirring components to rotate independently, thus separately stirring the slurry at different locations within the storage chamber, further reducing flocculation. This also reduces the number of driving components required, thereby lowering costs.

[0024] In some embodiments of this application, the coating apparatus further includes a liquid level sensor, which is located outside the storage chamber and is positioned opposite and spaced apart from the slurry in the storage chamber. The liquid level sensor is used to detect the liquid level height of the slurry in the storage chamber.

[0025] The liquid level sensor is used to detect the liquid level height of the slurry in the storage chamber, so as to determine whether to drive the agitator. At the same time, since the slurry has a certain viscosity, in order to reduce the amount of slurry adhering to the liquid level sensor and affecting the detection results, the liquid level sensor can be placed outside the storage chamber and placed opposite and spaced apart from the slurry in the storage chamber.

[0026] A second aspect of this application provides a coating apparatus, comprising:

[0027] The trough has a storage cavity for storing slurry;

[0028] The mixing assembly includes a drive unit and a mixing element connected to the output end of the drive unit. The drive unit is used to drive the mixing element to move within the storage chamber.

[0029] According to the coating apparatus of this application, the coating roller is disposed in the storage chamber and is used to coat the slurry in the storage chamber onto the substrate, thereby achieving coating of the substrate. During the coating process of the substrate, the driving component can drive the stirring component to move in the storage chamber, thereby driving the slurry in the storage chamber to move through the movement of the stirring component, reducing the flocculation phenomenon caused by the static standing of the slurry, reducing the viscosity of the slurry, and thus achieving a continuous coating process on the substrate.

[0030] In some embodiments of this application, the stirring assembly further includes a mounting base and a first connecting member. The mounting base is located inside the material trough and connected to the material trough. The first connecting member is rotatably connected to the mounting base. The main body of the driving member is located outside the material trough. The output end of the driving member is inserted into the storage cavity and drives the stirring member to rotate through the first connecting member.

[0031] The output end of the drive unit can be connected to the agitator through the first connector, thereby driving the agitator to rotate and agitate the slurry in the storage chamber. At the same time, the agitator can also be connected to the mounting base through the first connector, thereby connecting to the trough and being placed inside the trough.

[0032] In some embodiments of this application, the stirring member includes a blade portion and a support portion. The two ends of the support portion along its own axial direction are respectively connected to the driving member and the blade portion. The driving member is used to drive the support portion to rotate around its own axial direction. The blade portion includes a first connecting portion and a second connecting portion. The first connecting portion includes a first end and a second end disposed opposite to each other. The first end is connected to the support portion. The second end is disposed on the side of the first end close to the driving member and spaced apart from the support portion. The second connecting portion is connected to the second end and is spaced equally from the support portion.

[0033] By placing the second end of the first connecting part on the side of the first end close to the driving member and spaced apart from the support part, the first connecting part and the support part are arranged at an acute angle, which increases the force of the stirring member in the direction perpendicular to the axial direction of the support part, thereby increasing the fluidity of the slurry in the storage chamber. At the same time, the second connecting part is connected to the second end and is spaced apart from the support part, so that during the rotation of the second connecting part around the axial direction of the support part, the slurry can be driven to move in the direction parallel to the axial direction of the support part, thereby driving the slurry in the range of the direction parallel to the axial direction of the support part to move together.

[0034] In some embodiments of this application, the top of the storage chamber is provided with an opening, and the coating device also includes a baffle plate. The baffle plate is located on the side of the agitator facing the opening, and along the direction from the agitator to the baffle plate, the projection of the agitator in the plane where the baffle plate is located at least partially coincides with the baffle plate.

[0035] Since one end of the storage chamber has an opening, in order to reduce the splashing of slurry to the outside of the storage chamber during the mixing process of the agitator, a baffle plate is set on the side of the agitator facing the opening and is used to block the slurry.

[0036] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0038] Figure 1 This is a partial structural schematic diagram of a battery production system provided in one embodiment of this application;

[0039] Figure 2 yes Figure 1 A schematic diagram of the coating device in the diagram;

[0040] Figure 3 yes Figure 2 A schematic diagram of the coating device from another angle;

[0041] Figure 4 yes Figure 3 A perspective structural diagram of the coating device in the diagram;

[0042] Figure 5 yes Figure 4 Exploded view of the coating device in the diagram;

[0043] Figure 6 yes Figure 4 A schematic diagram of the connection structure between part of the stirring component and the second connector;

[0044] Figure 7 yes Figure 6 A schematic diagram of the stirring component in the process.

[0045] The reference numerals in the detailed embodiments are as follows:

[0046] 1000. Battery production system;

[0047] 100. Coating apparatus;

[0048] 10. Material trough; 11. Bottom plate; 12. Side plate; 101. Storage cavity; 102. Opening;

[0049] 20. Stirring assembly; 21. Drive component; 22. Stirring component; 221. Blade section; 2211. First connecting part; 22111. First end; 22112. Second end; 2212. Second connecting part; 222. Support part; 23. Mounting base; 24. First connecting component;

[0050] 30. Baffle; 31. Groove;

[0051] 40. Second connector;

[0052] 200. Coating roller. Detailed Implementation

[0053] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0054] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0055] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0056] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0057] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0058] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] Currently, the production of electrodes for lithium iron phosphate batteries typically involves coating a substrate (aluminum foil) with conductive carbon to increase the electrode's conductivity. This coating process generally employs gravure coating. Gravure coating involves partially immersing a single coating roller (gravure roller) wrapped with a substrate into a slurry bath. The coating roller and the substrate rotate at a specific speed to coat the slurry from the bath onto the electrode sheet. During gravure coating, some of the slurry in the bath may flocculate due to settling, leading to increased viscosity and making continuous coating impossible. This results in the slurry in the bath becoming unusable and requiring replacement before coating can begin again, thus impacting electrode production efficiency.

[0060] The slurry itself is an aqueous slurry, and the main component of the slurry is conductive carbon. This substance is not hydrophilic. It uses amphoteric molecules CMC as a dispersant and thickener. CMC is adsorbed on the surface of conductive carbon. CMC is hydrophilic and forms a slurry by combining conductive carbon and water. However, when the slurry is left to stand, the CMC in the slurry will agglomerate, causing the slurry to flocculate.

[0061] To address the problem of slurry flocculation during gravure coating, this application proposes a battery production system, coating device, and coating method. During the coating process on the substrate, the slurry in the storage chamber can be moved, reducing flocculation caused by slurry settling, lowering the viscosity of the slurry, and thus achieving a continuous coating process on the substrate.

[0062] Combination Figures 1 to 5 As shown, the first aspect of this application discloses a battery production system 1000. In some embodiments of this application, the battery production system 1000 includes a coating device 100 and a coating roller 200. The coating device 100 includes a material tank 10 and a stirring assembly 20. The material tank 10 forms a storage cavity 101 for storing slurry. The stirring assembly 20 includes a drive member 21 and a stirring member 22 connected to the output end of the drive member 21. The drive member 21 is used to drive the stirring member 22 to move within the storage cavity 101. At least a portion of the coating roller 200 is disposed within the storage cavity 101 and is used to coat the slurry in the storage cavity 101 onto the substrate.

[0063] Specifically, a storage cavity 101 is formed inside the material tank 10. The specific shape and structure of the material tank 10 and the storage cavity 101 are not limited. The storage cavity 101 is used to store the slurry. The coating roller 200 can be placed inside the storage cavity 101 and can contact the slurry. Thus, the slurry in the storage cavity 101 is coated onto the substrate by the rotation of the coating roller 200. During the process of the coating roller 200 coating the slurry onto the substrate, the slurry in the storage cavity 101 that is only in contact with or near the coating roller 200 is in motion and will not flocculate. However, the slurry far away from the coating roller 200 is prone to flocculation when left to stand for a long time, which leads to an increase in the viscosity of the slurry and makes it difficult to coat. Therefore, this application also provides a stirring assembly 20, which includes a driving member 21 and a stirring member 22 connected to the output end of the driving member 21. At least part of the stirring member 22 is disposed in the storage chamber 101 and in contact with the slurry. The driving member 21 is used to drive the stirring member 22 to move in the storage chamber 101, thereby driving the slurry in the storage chamber 101 to move through the stirring member 22, reducing the flocculation phenomenon caused by the slurry standing still, reducing the viscosity of the slurry, and thus realizing the continuous coating process of the substrate.

[0064] Optionally, the coating roller 200 is a gravure roller. Optionally, the agitator 22 is disposed in the storage chamber 101 in a linear reciprocating motion. Correspondingly, the drive component 21 can be a drive cylinder. The drive component 21 drives the agitator 22 to reciprocate linearly in the storage chamber 101, thereby agitating the slurry in the storage chamber 101 during the movement of the agitator 22, keeping the slurry in the storage chamber 101 in a continuous dynamic process and reducing slurry flocculation. Alternatively, the agitator 22 is disposed in the storage chamber 101 in a rotatable manner. Correspondingly, the drive component 21 can be a drive motor. The drive component 21 drives the agitator 22 to rotate in the storage chamber 101, thereby agitating the slurry in the storage chamber 101 during the movement of the agitator 22, keeping the slurry in the storage chamber 101 in a continuous dynamic process and reducing slurry flocculation. For ease of description, the embodiments of this application will only be described using the example of the driving component 21 as the driving motor and the stirring component 22 rotating in the storage chamber 101 under the action of the driving component 21.

[0065] Combination Figures 1 to 6 As shown, in some embodiments of this application, the stirring assembly 20 further includes a mounting base 23 and a first connecting member 24. The mounting base 23 is disposed inside the material trough 10 and connected to the material trough 10. The first connecting member 24 is rotatably connected to the mounting base 23. The main body of the driving member 21 is disposed outside the material trough 10. The output end of the driving member 21 is inserted into the storage chamber 101 and drives the stirring member 22 to rotate through the first connecting member 24.

[0066] Specifically, the stirring assembly 20 also includes a mounting base 23 and a first connecting member 24. The mounting base 23 is a seat structure and can be connected to the material trough 10, thereby mounting the stirring member 22 in the storage chamber 101. The first connecting member 24 is rotatably connected to the mounting base 23, so that the driving member 21 can be connected to the stirring member 22 through the first connecting member 24, and drive the first connecting member 24 and the stirring member 22 to rotate together. Optionally, when the driving member 21 is a drive motor, the motor body of the drive motor can be located outside the material trough 10 and fixedly connected to the material trough 10 by a bracket. The motor shaft of the drive motor can extend into the storage chamber 101 and pass through the mounting base 23 to connect to the first connecting member 24. The first connecting member 24 can be a coupling and is used to connect the stirring member 22 and the motor shaft. Optionally, the connection between the mounting base 23 and the material trough 10 is a sealed structure, and a receiving cavity is formed between the mounting base 23 and the material trough 10. The slurry in the storage chamber 101 will not enter the receiving chamber, thereby reducing the adhesion of slurry to the drive component 21 and improving the reliability of the operation of the drive component 21.

[0067] The output end of the drive unit 21 can be connected to the agitator 22 through the first connector 24, thereby driving the agitator 22 to rotate and agitate the slurry in the storage chamber 101. At the same time, the agitator 22 can also be connected to the mounting base 23 through the first connector 24, thereby connecting to the material trough 10 through the mounting base 23 and being located inside the material trough 10.

[0068] Combination Figures 1 to 7 As shown, in some embodiments of this application, the stirring member 22 includes a blade portion 221 and a support portion 222. The two ends of the support portion 222 along its own axial direction are respectively connected to the driving member 21 and the blade portion 221. The driving member 21 is used to drive the support portion 222 to rotate around its own axial direction. At least a portion of the blade portion 221 is arranged at an angle with the support portion 222 and is able to rotate around the axial direction of the support portion 222.

[0069] Specifically, the support portion 222 can be a long strip structure with an axial direction, and the axial direction of the support portion 222 is consistent with the axial direction of the output end of the drive member 21 and is on the same straight line. When the output end of the drive member 21 rotates, the support portion 222 can rotate around its own axis and drive the blade portion 221 to rotate together, thereby stirring the slurry in the storage chamber 101 through the blade portion 221. The support portion 222 is mainly used to support the rotation of the blade portion 221 and transmit power to the blade portion 221. In order to reduce the resistance of the slurry when the support portion 222 rotates, the support portion 222 can be a round rod structure. At the same time, in order to improve the stirring force and range of the blade portion 221, at least a portion of the blade portion 221 is set at an angle to the support portion 222.

[0070] Since the blade portion 221 is set at an angle to the support portion 222 and can rotate around the axis of the support portion 222, when the drive member 21 drives the support portion 222 to rotate around its own axis, the blade portion 221 can also rotate around the axis of the support portion 222 and drive the slurry in the storage chamber 101 to move, thereby achieving the function of stirring the slurry.

[0071] Combination Figures 1 to 7 As shown, in some embodiments of this application, the blade portion 221 includes a first connecting portion 2211 and a second connecting portion 2212. The first connecting portion 2211 includes a first end portion 22111 and a second end portion 22112 disposed opposite to each other. The first end portion 22111 is connected to the support portion 222. The second end portion 22112 is disposed on the side of the first end portion 22111 near the drive member 21 and is spaced apart from the support portion 222. The second connecting portion 2212 is connected to the second end portion 22112 and is spaced equally from the support portion 222.

[0072] Specifically, the blade portion 221 includes a first connecting portion 2211 and a second connecting portion 2212. The first connecting portion 2211 and the second connecting portion 2212 are respectively disposed on one side of the support portion 222 along a direction perpendicular to the axial direction of the support portion 222, and form a gap between them, thereby facilitating the stirring of the slurry in the storage chamber 101 during rotation. The support portion 222, the first connecting portion 2211, and the second connecting portion 2212 are connected sequentially. The end of the first connecting portion 2211 connected to the support portion 222 is the first end portion 22111, and the other end of the first connecting portion 2211 connected to the second connecting portion 2212 is the second end portion 22112. Along the direction from the first end portion 22111 to the second end portion 22112, the gap between the first connecting portion 2211 and the support portion 222 gradually increases, thereby increasing the stirring range of the first connecting portion 2211. The second connecting portion 2212 is connected to the second end portion 22112 and is equally spaced from the support portion 222. This allows the slurry to move in a direction parallel to the axial direction of the support portion 222 during rotation, reducing splashing. Optionally, the first connecting portion 2211 and the second connecting portion 2212 can be an integral sheet structure or a flat plate structure, thereby increasing the contact area between the blade portion 221 and the slurry during rotation.

[0073] By placing the second end 22112 of the first connecting part 2211 on the side of the first end 22111 close to the driving member 21 and spaced apart from the support part 222, the first connecting part 2211 and the support part 222 are arranged at an acute angle, which increases the force of the stirring member 22 in the direction perpendicular to the axial direction of the support part 222, thereby increasing the fluidity of the slurry in the storage chamber 101. At the same time, the second connecting part 2212 is connected to the second end 22112 and is spaced apart from the support part 222, so that during the rotation of the second connecting part 2212 around the axial direction of the support part 222, the slurry can be driven to move in the direction parallel to the axial direction of the support part 222, thereby driving the slurry in the range of the direction parallel to the axial direction of the support part 222 to move together.

[0074] Combination Figures 1 to 7 As shown, in some embodiments of this application, the material trough 10 includes a bottom plate 11 and a side plate 12 disposed around the edge of the bottom plate 11. The bottom plate 11 and the side plate 12 together form a material storage cavity 101. The output end of the drive member 21 passes through the bottom plate 11 and is connected to the stirring member 22.

[0075] Specifically, the base plate 11 has a roughly rectangular structure, and multiple side plates 12 are arranged along the edge of the base plate 11 and connected end to end to form a storage cavity 101. The main body of the drive unit 21 is located on the side of the base plate 11 away from the storage cavity 101. The output end of the drive unit 21 passes through the base plate 11 and is connected to the agitator 22, and is used to drive the agitator 22 to rotate.

[0076] By passing the output end of the drive unit 21 through the base plate 11 and connecting it with the agitator 22, the agitator 22 can be inserted into the slurry along the depth direction of the storage chamber 101, thereby agitating the slurry in the depth direction of the storage chamber 101 and reducing the flocculation phenomenon of the slurry at the bottom of the storage chamber 101.

[0077] In some embodiments of this application, the main body of the drive member 21 may be located on the side of the side plate 12 away from the storage chamber 101, and the output end of the drive member 21 may pass through the side plate 12 and be connected to the agitator 22, and be used to drive the agitator 22 to rotate.

[0078] Combination Figures 1 to 6 As shown, in some embodiments of this application, the top of the storage chamber 101 is provided with an opening 102, and the coating device 100 also includes a baffle plate 30. The baffle plate 30 is disposed on the side of the stirring member 22 facing the opening 102. Along the direction from the stirring member 22 to the baffle plate 30, the projection of the stirring member 22 in the plane where the baffle plate 30 is located at least partially coincides with the baffle plate 30.

[0079] Specifically, the opening 102 and the base plate 11 are respectively located on opposite sides of the storage chamber 101. The coating roller 200 can extend into the storage chamber 101 through the opening 102 and coat the substrate. The baffle plate 30 is located on the side of the agitator 22 facing the opening 102 and is used to block splashing droplets generated by the agitator 22. Optionally, the baffle plate 30 can be connected to the side plate 12 of the trough 10 and placed above the agitator 22. Alternatively, the baffle plate 30 can be placed above the agitator 22 and connected to the agitator 22, and can rotate together with the agitator 22 under the action of the drive member 21. Optionally, along the direction from the agitator 22 to the baffle plate 30, that is, along the direction perpendicular to the surface of the baffle plate 30, the projection of the agitator 22 in the plane of the baffle plate 30 is completely within the surface area of ​​the baffle plate 30.

[0080] Since one end of the storage chamber 101 has an opening 102, in order to reduce the splashing of slurry to the outside of the storage chamber 101 during the stirring process of the agitator 22, a baffle plate 30 is provided on the side of the agitator 22 facing the opening 102 and is used to block the splashed slurry.

[0081] Combination Figures 1 to 6 As shown, in some embodiments of this application, the surface of the baffle plate 30 facing the agitator 22 is provided with protrusions or grooves 31.

[0082] Specifically, the surface of the baffle plate 30 facing the agitator 22 has an uneven structure, including protrusions or grooves 31. Optionally, to facilitate the installation of the baffle plate 30, the two opposite surfaces of the baffle plate 30 are respectively provided with protrusions and grooves 31, so that either the upper or lower surface of the baffle plate 30 can be facing the agitator 22 during installation.

[0083] By providing protrusions or grooves 31 on the surface of the baffle plate 30 facing the agitator 22, some of the slurry can come into contact with the protrusions or grooves 31 on the baffle plate 30 during its movement toward the opening 102, thereby slowing down the flow rate of the slurry along the surface of the baffle plate 30 and reducing the amount of slurry flowing out of the storage chamber 101 in a direction parallel to the surface of the baffle plate 30.

[0084] Combination Figures 1 to 6 As shown, in some embodiments of this application, the baffle plate 30 is connected to the trough 10, and the top of the agitator 22 is rotatably connected to the baffle plate 30.

[0085] Specifically, the baffle plate 30 is connected to the side plate 12 of the material trough 10, which can be by welding or bolting. The bottom of the support part 222 is rotatably connected to the first connecting member 24, and the top of the support part 222 is rotatably connected to the baffle plate 30, so that the two ends of the support part 222 are supported and fixed respectively, improving the stability of the support part 222 when rotating. Optionally, for easy connection, the surface of the baffle plate 30 facing the stirring member 22 is provided with a second connecting member 40, and the top of the support part 222 is rotatably connected to the second connecting member 40. Optionally, the second connecting member 40 can be a rolling bearing.

[0086] The top of the agitator 22 is rotatably connected to the baffle plate 30, which supports the top of the agitator 22, thereby improving the stability of the agitator 22 when rotating and reducing the deformation caused by the resistance of the slurry when the agitator 22 rotates.

[0087] Combination Figures 1 to 5 As shown, in some embodiments of this application, the coating apparatus 100 includes a plurality of driving members 21 and a plurality of stirring members 22, the number of driving members 21 and the number of stirring members 22 are the same, and the plurality of driving members 21 and the plurality of stirring members 22 are connected one-to-one to form a plurality of stirring assemblies 20; or, the coating apparatus 100 includes at least one driving member 21 and a plurality of stirring members 22, the number of driving members 21 is less than the number of stirring members 22, and at least two stirring members 22 are connected to the same driving member 21 to form a stirring assembly 20.

[0088] Specifically, with Figures 1 to 5 The following example is used for illustration. The coating apparatus 100 includes five driving elements 21 and five stirring elements 22. The five driving elements 21 and five stirring elements 22 are connected one-to-one to form five stirring assemblies 20. Each driving element 21 in any stirring assembly 20 independently drives one of its connected stirring elements 22 to rotate. Alternatively, the coating apparatus 100 includes one driving element 21 and two stirring elements 22. One driving element 21 is connected to two stirring elements 22 via synchronous pulleys to form a stirring assembly 20. When the driving element 21 operates, it can simultaneously drive the two connected stirring elements 22 to rotate together. Optionally, the driving element 21 can be connected to the stirring element 22 via a first connecting member 24, and the first connecting member 24 is rotatably connected to a mounting base 23, which is fixedly connected inside the material tank 10.

[0089] Multiple driving components 21 and multiple stirring components 22 are connected one-to-one to form multiple stirring assemblies 20. These multiple stirring assemblies 20 can stir the slurry at different locations within the storage chamber 101, thereby reducing flocculation of the slurry within the storage chamber 101. Alternatively, at least two stirring components 22 can be connected to the same driving component 21 to form a stirring assembly 20. One driving component 21 can drive two stirring components 22 to rotate, thereby stirring the slurry at different locations within the storage chamber 101, reducing flocculation of the slurry within the storage chamber 101, and also reducing the number of driving components 21 required, thus lowering costs.

[0090] Combination Figures 1 to 5 As shown, in some embodiments of this application, the coating apparatus 100 further includes a liquid level sensor (not shown in the figure). The liquid level sensor is located outside the storage chamber 101 and is positioned opposite to and spaced apart from the slurry in the storage chamber 101. The liquid level sensor is used to detect the liquid level height of the slurry in the storage chamber 101.

[0091] Specifically, the liquid level sensor can be located above the side of the storage chamber 101 with the opening 102, and is positioned opposite and spaced apart from the slurry in the storage chamber 101. Optionally, the liquid level sensor can be an infrared sensor. The infrared light emitted by the infrared sensor can illuminate the surface of the slurry in the storage chamber 101, and is received again by the infrared sensor due to the reflection of the slurry. The liquid level height of the slurry can be calculated based on the time difference between the emission and reception of the infrared light by the infrared sensor.

[0092] The liquid level sensor is used to detect the liquid level height of the slurry in the storage chamber 101, so as to determine whether to drive the agitator 22 to operate based on the liquid level height. At the same time, since the slurry has a certain viscosity, in order to reduce the amount of slurry adhering to the liquid level sensor and affecting the detection result of the liquid level sensor, the liquid level sensor can be set outside the storage chamber 101 and set opposite to and at intervals with the slurry in the storage chamber 101.

[0093] Combination Figures 1 to 5 As shown, in some embodiments of this application, the coating apparatus 100 further includes a controller (not shown), and a liquid level sensor and a drive unit 21 are electrically connected to the controller. The controller can determine whether to start the drive unit 21 to drive the stirring unit 22 to operate based on the detection signal from the liquid level sensor.

[0094] Combination Figures 1 to 5 As shown, a second aspect of this application provides a coating apparatus 100, which includes a material tank 10 and a stirring assembly 20. The material tank 10 is formed with a storage cavity 101 for storing slurry. The stirring assembly 20 includes a drive member 21 and a stirring member 22 connected to the output end of the drive member 21. The drive member 21 is used to drive the stirring member 22 to move within the storage cavity 101.

[0095] Specifically, a storage cavity 101 is formed inside the material tank 10. The specific shape and structure of the material tank 10 and the storage cavity 101 are not limited. The storage cavity 101 is used to store the slurry. The coating roller 200 can be placed inside the storage cavity 101 and can contact the slurry. Thus, the slurry in the storage cavity 101 is coated onto the substrate by the rotation of the coating roller 200. During the process of the coating roller 200 coating the slurry onto the substrate, the slurry in the storage cavity 101 that is only in contact with or near the coating roller 200 is in motion and will not flocculate. However, the slurry far away from the coating roller 200 is prone to flocculation when left to stand for a long time, which leads to an increase in the viscosity of the slurry and makes it difficult to coat. Therefore, this application also provides a stirring assembly 20, which includes a driving member 21 and a stirring member 22 connected to the output end of the driving member 21. At least part of the stirring member 22 is disposed in the storage chamber 101 and in contact with the slurry. The driving member 21 is used to drive the stirring member 22 to move in the storage chamber 101, thereby driving the slurry in the storage chamber 101 to move through the stirring member 22, reducing the flocculation phenomenon caused by the slurry standing still, reducing the viscosity of the slurry, and thus realizing the continuous coating process of the substrate.

[0096] Optionally, the coating roller 200 is a gravure roller. Optionally, the agitator 22 is disposed in the storage chamber 101 in a linear reciprocating motion. Correspondingly, the drive component 21 can be a drive cylinder. The drive component 21 drives the agitator 22 to reciprocate linearly in the storage chamber 101, thereby agitating the slurry in the storage chamber 101 during the movement of the agitator 22, keeping the slurry in the storage chamber 101 in a continuous dynamic process and reducing slurry flocculation. Alternatively, the agitator 22 is disposed in the storage chamber 101 in a rotatable manner. Correspondingly, the drive component 21 can be a drive motor. The drive component 21 drives the agitator 22 to rotate in the storage chamber 101, thereby agitating the slurry in the storage chamber 101 during the movement of the agitator 22, keeping the slurry in the storage chamber 101 in a continuous dynamic process and reducing slurry flocculation. For ease of description, the embodiments of this application will only be described using the example of the driving component 21 as the driving motor and the stirring component 22 rotating in the storage chamber 101 under the action of the driving component 21.

[0097] According to the coating apparatus 100 of this application, the coating roller 200 is disposed in the storage chamber 101 and is used to coat the slurry in the storage chamber 101 onto the substrate, thereby achieving coating of the substrate. During the coating process of the substrate, the driving member 21 can drive the stirring member 22 to move in the storage chamber 101, thereby driving the slurry in the storage chamber 101 to move through the movement of the stirring member 22, reducing the flocculation phenomenon caused by the static standing of the slurry, reducing the viscosity of the slurry, and thus achieving a continuous coating process on the substrate.

[0098] Combination Figures 1 to 6As shown, in some embodiments of this application, the stirring assembly 20 further includes a mounting base 23 and a first connecting member 24. The mounting base 23 is disposed inside the material trough 10 and connected to the material trough 10. The first connecting member 24 is rotatably connected to the mounting base 23. The main body of the driving member 21 is disposed outside the material trough 10. The output end of the driving member 21 is inserted into the storage chamber 101 and drives the stirring member 22 to rotate through the first connecting member 24.

[0099] Specifically, the stirring assembly 20 also includes a mounting base 23 and a first connecting member 24. The mounting base 23 is a seat structure and can be connected to the material trough 10, thereby mounting the stirring member 22 in the storage chamber 101. The first connecting member 24 is rotatably connected to the mounting base 23, so that the driving member 21 can be connected to the stirring member 22 through the first connecting member 24, and drive the first connecting member 24 and the stirring member 22 to rotate together. Optionally, when the driving member 21 is a drive motor, the motor body of the drive motor can be located outside the material trough 10 and fixedly connected to the material trough 10 by a bracket. The motor shaft of the drive motor can extend into the storage chamber 101 and pass through the mounting base 23 to connect to the first connecting member 24. The first connecting member 24 can be a coupling and is used to connect the stirring member 22 and the motor shaft. Optionally, the connection between the mounting base 23 and the material trough 10 is a sealed structure, and a receiving cavity is formed between the mounting base 23 and the material trough 10. The slurry in the storage chamber 101 will not enter the receiving chamber, thereby reducing the adhesion of slurry to the drive component 21 and improving the reliability of the operation of the drive component 21.

[0100] The output end of the drive unit 21 can be connected to the agitator 22 through the first connector 24, thereby driving the agitator 22 to rotate and agitate the slurry in the storage chamber 101. At the same time, the agitator 22 can also be connected to the mounting base 23 through the first connector 24, thereby connecting to the material trough 10 through the mounting base 23 and being located inside the material trough 10.

[0101] Combination Figures 1 to 7 As shown, in some embodiments of this application, the stirring member 22 includes a blade portion 221 and a support portion 222. The two ends of the support portion 222 along its own axial direction are respectively connected to the driving member 21 and the blade portion 221. The driving member 21 is used to drive the support portion 222 to rotate around its own axial direction. The blade portion 221 includes a first connecting portion 2211 and a second connecting portion 2212. The first connecting portion 2211 includes a first end portion 22111 and a second end portion 22112 arranged oppositely. The first end portion 22111 is connected to the support portion 222. The second end portion 22112 is located on the side of the first end portion 22111 close to the driving member 21 and is spaced apart from the support portion 222. The second connecting portion 2212 is connected to the second end portion 22112 and is spaced equally from the support portion 222.

[0102] Specifically, the support portion 222 can be a long strip structure with an axial direction, and the axial direction of the support portion 222 is consistent with the axial direction of the output end of the drive member 21 and is on the same straight line. When the output end of the drive member 21 rotates, the support portion 222 can rotate around its own axis and drive the blade portion 221 to rotate together, thereby stirring the slurry in the storage chamber 101 through the blade portion 221. The support portion 222 is mainly used to support the rotation of the blade portion 221 and transmit power to the blade portion 221. In order to reduce the resistance of the slurry when the support portion 222 rotates, the support portion 222 can be a round rod structure. At the same time, in order to improve the stirring force and range of the blade portion 221, at least a portion of the blade portion 221 is set at an angle to the support portion 222.

[0103] The blade portion 221 includes a first connecting portion 2211 and a second connecting portion 2212. The first connecting portion 2211 and the second connecting portion 2212 are respectively disposed on one side of the support portion 222 in a direction perpendicular to the axial direction of the support portion 222, thereby facilitating the stirring of the slurry in the storage chamber 101 by the blade portion 221 during rotation. The support portion 222, the first connecting portion 2211, and the second connecting portion 2212 are connected sequentially. The end of the first connecting portion 2211 connected to the support portion 222 is the first end portion 22111, and the end of the first connecting portion 2211 connected to the second connecting portion 2212 is the second end portion 22112. Along the direction from the first end portion 22111 to the second end portion 22112, the distance between the first connecting portion 2211 and the support portion 222 gradually increases, thereby increasing the stirring range of the first connecting portion 2211. The second connecting portion 2212 is connected to the second end portion 22112 and is equally spaced from the support portion 222. This allows the slurry to move in a direction parallel to the axial direction of the support portion 222 during rotation, reducing splashing. Optionally, the first connecting portion 2211 and the second connecting portion 2212 can be an integral sheet structure or a flat plate structure, thereby increasing the contact area between the blade portion 221 and the slurry during rotation.

[0104] By placing the second end 22112 of the first connecting part 2211 on the side of the first end 22111 close to the driving member 21 and spaced apart from the support part 222, the first connecting part 2211 and the support part 222 are arranged at an acute angle, which increases the force of the stirring member 22 in the direction perpendicular to the axial direction of the support part 222, thereby increasing the fluidity of the slurry in the storage chamber 101. At the same time, the second connecting part 2212 is connected to the second end 22112 and is spaced apart from the support part 222, so that during the rotation of the second connecting part 2212 around the axial direction of the support part 222, the slurry can be driven to move in the direction parallel to the axial direction of the support part 222, thereby driving the slurry in the range of the direction parallel to the axial direction of the support part 222 to move together.

[0105] Combination Figures 1 to 5 As shown, in some embodiments of this application, the top of the storage chamber 101 is provided with an opening 102, and the coating device 100 also includes a baffle plate 30. The baffle plate 30 is disposed on the side of the stirring member 22 facing the opening 102. Along the direction from the stirring member 22 to the baffle plate 30, the projection of the stirring member 22 in the plane where the baffle plate 30 is located at least partially coincides with the baffle plate 30.

[0106] Specifically, the opening 102 and the base plate 11 are respectively located on opposite sides of the storage chamber 101. The coating roller 200 can extend into the storage chamber 101 through the opening 102 and coat the substrate. The baffle plate 30 is located on the side of the agitator 22 facing the opening 102 and is used to block splashing droplets generated by the agitator 22. Optionally, the baffle plate 30 can be connected to the side plate 12 of the trough 10 and placed above the agitator 22. Alternatively, the baffle plate 30 can be placed above the agitator 22 and connected to the agitator 22, and can rotate together with the agitator 22 under the action of the drive member 21. Optionally, along the direction from the agitator 22 to the baffle plate 30, that is, along the direction perpendicular to the surface of the baffle plate 30, the projection of the agitator 22 in the plane of the baffle plate 30 is completely within the surface area of ​​the baffle plate 30.

[0107] Since one end of the storage chamber 101 has an opening 102, in order to reduce the splashing of slurry to the outside of the storage chamber 101 during the stirring process of the agitator 22, a baffle plate 30 is provided on the side of the agitator 22 facing the opening 102 and is used to block the splashed slurry.

[0108] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0109] Combination Figures 1 to 7 As shown, this application proposes a battery production system 1000, which includes a coating device 100 and a coating roller 200. The coating device 100 includes a material tank 10 and a stirring assembly 20. The material tank 10 has a storage cavity 101 for storing slurry. The stirring assembly 20 includes a drive member 21 and a stirring member 22 connected to the output end of the drive member 21. The drive member 21 is used to drive the stirring member 22 to move in the storage cavity 101. At least a portion of the coating roller 200 is disposed in the storage cavity 101 and is used to coat the slurry in the storage cavity 101 onto the substrate.

[0110] The coating apparatus 100 includes multiple driving elements 21 and multiple stirring elements 22. The number of driving elements 21 and stirring elements 22 are the same, and the multiple driving elements 21 and stirring elements 22 are connected one-to-one to form multiple stirring assemblies 20. The material tank 10 includes a bottom plate 11 and side plates 12 arranged around the edge of the bottom plate 11. The bottom plate 11 and the side plates 12 together form a material storage cavity 101. The output end of the driving element 21 passes through the bottom plate 11 and is connected to the stirring element 22. The top of the material storage cavity 101 is provided with an opening 102. The coating apparatus 100 also includes a baffle plate 30, which is connected to the material tank 10 and is located on the side of the stirring element 22 facing the opening 102. The top of the stirring element 22 is rotatably connected to the baffle plate 30. Along the direction from the stirring element 22 to the baffle plate 30, the projection of the stirring element 22 in the plane of the baffle plate 30 at least partially coincides with the baffle plate 30. The baffle plate 30 has a groove 31 on its surface facing the agitator 22.

[0111] The stirring assembly 20 also includes a mounting base 23 and a first connecting member 24. The mounting base 23 is located inside and connected to the material trough 10. The first connecting member 24 is rotatably connected to the mounting base 23. The main body of the driving member 21 is located outside the material trough 10. The output end of the driving member 21 is inserted into the storage chamber 101 and drives the stirring member 22 to rotate through the first connecting member 24. The stirring member 22 includes a blade portion 221 and a support portion 222. The two ends of the support portion 222 along its own axial direction are respectively connected to the driving member 21 and the blade portion 221. The driving member 21 is used to drive the support portion 222 to rotate around its own axial direction. At least a portion of the blade portion 221 is set at an angle to the support portion 222 and is capable of rotating around the axial direction of the support portion 222. The blade portion 221 includes a first connecting portion 2211 and a second connecting portion 2212. The first connecting portion 2211 includes a first end portion 22111 and a second end portion 22112 disposed opposite to each other. The first end portion 22111 is connected to the support portion 222. The second end portion 22112 is disposed on the side of the first end portion 22111 close to the drive member 21 and is spaced apart from the support portion 222. The second connecting portion 2212 is connected to the second end portion 22112 and is spaced equally from the support portion 222.

[0112] The coating apparatus 100 also includes a liquid level sensor, which is located outside the storage chamber 101 and is positioned opposite and spaced apart from the slurry in the storage chamber 101. The liquid level sensor is used to detect the liquid level height of the slurry in the storage chamber 101.

[0113] 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 various 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 battery production system, characterized in that, include: A coating apparatus, the coating apparatus including a material tank and a stirring assembly, the material tank forming a storage cavity for storing slurry, the stirring assembly including a driving member and a stirring member connected to the output end of the driving member, the driving member being used to drive the stirring member to move within the storage cavity; A coating roller, at least a portion of which is disposed within the storage chamber, is used to coat the slurry in the storage chamber onto a substrate.

2. The battery production system according to claim 1, characterized in that, The stirring assembly further includes a mounting base and a first connecting member. The mounting base is located inside the material trough and connected to the material trough. The first connecting member is rotatably connected to the mounting base. The main body of the driving member is located outside the material trough. The output end of the driving member is inserted into the storage cavity and drives the stirring member to rotate through the first connecting member.

3. The battery production system according to claim 1, characterized in that, The stirring component includes a blade portion and a support portion. The two ends of the support portion along its own axial direction are respectively connected to the driving component and the blade portion. The driving component is used to drive the support portion to rotate around its own axial direction. At least a portion of the blade portion is set at an angle to the support portion and is capable of rotating around the axial direction of the support portion.

4. The battery production system according to claim 3, characterized in that, The blade portion includes a first connecting portion and a second connecting portion. The first connecting portion includes a first end and a second end that are disposed opposite to each other. The first end is connected to the support portion. The second end is disposed on the side of the first end near the drive member and is spaced apart from the support portion. The second connecting portion is connected to the second end and is spaced equally from the support portion.

5. The battery production system according to any one of claims 1 to 4, characterized in that, The material trough includes a bottom plate and side plates arranged around the edge of the bottom plate. The bottom plate and the side plates together form the material storage cavity. The output end of the drive unit passes through the bottom plate and is connected to the stirring unit.

6. The battery production system according to claim 5, characterized in that, The top of the storage chamber is provided with an opening, and the coating device also includes a baffle plate. The baffle plate is located on the side of the stirring member facing the opening. Along the direction from the stirring member to the baffle plate, the projection of the stirring member in the plane where the baffle plate is located at least partially coincides with the baffle plate.

7. The battery production system according to claim 6, characterized in that, The baffle plate has protrusions or grooves on the surface facing the agitator.

8. The battery production system according to claim 6, characterized in that, The baffle plate is connected to the material trough, and the top of the agitator is rotatably connected to the baffle plate.

9. The battery production system according to any one of claims 1 to 4, characterized in that, The coating apparatus includes a plurality of driving elements and a plurality of stirring elements, wherein the number of driving elements and the number of stirring elements are the same, and the plurality of driving elements and the plurality of stirring elements are connected in a one-to-one correspondence to form a plurality of stirring assemblies; or, the coating apparatus includes at least one driving element and a plurality of stirring elements, wherein the number of driving elements is less than the number of stirring elements, and at least two stirring elements are connected to the same driving element to form a stirring assembly.

10. The battery production system according to any one of claims 1 to 4, characterized in that, The coating apparatus further includes a liquid level sensor, which is located outside the storage chamber and is positioned opposite and spaced apart from the slurry in the storage chamber. The liquid level sensor is used to detect the liquid level height of the slurry in the storage chamber.

11. A coating apparatus, characterized in that, include: A trough having a storage cavity for storing slurry; A stirring assembly, comprising a driving member and a stirring element connected to the output end of the driving member, wherein the driving member is used to drive the stirring element to move within the storage chamber.

12. The coating apparatus according to claim 11, characterized in that, The stirring assembly further includes a mounting base and a first connecting member. The mounting base is located inside the material trough and connected to the material trough. The first connecting member is rotatably connected to the mounting base. The main body of the driving member is located outside the material trough. The output end of the driving member is inserted into the storage cavity and drives the stirring member to rotate through the first connecting member.

13. The coating apparatus according to claim 12, characterized in that, The stirring component includes a blade portion and a support portion. The two ends of the support portion along its own axial direction are respectively connected to the driving component and the blade portion. The driving component is used to drive the support portion to rotate around its own axial direction. The blade portion includes a first connecting portion and a second connecting portion. The first connecting portion includes a first end and a second end that are arranged oppositely. The first end is connected to the support portion. The second end is located on the side of the first end near the driving component and is spaced apart from the support portion. The second connecting portion is connected to the second end and is spaced equally from the support portion.

14. The coating apparatus according to claim 11, characterized in that, The top of the storage chamber is provided with an opening, and the coating device also includes a baffle plate. The baffle plate is located on the side of the stirring member facing the opening. Along the direction from the stirring member to the baffle plate, the projection of the stirring member in the plane where the baffle plate is located at least partially coincides with the baffle plate.

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