Coating equipment and battery production equipment

Abstract

The utility model relates to coating equipment and battery production equipment. The coating equipment comprises a coating platform used for placing a to-be-coated product; the moving device can reciprocate in the first direction relative to the coating platform; and the multiple die heads are all arranged on the moving device, the die heads are used for coating the product to be coated, and the heights of the die heads relative to the coating platform in the second direction intersecting with the first direction can be independently adjusted. Due to the fact that the multiple die heads are integrated on the same moving device to be arranged, and the height of each die head relative to the coating platform can be independently adjusted, when a product to be coated needs to be coated with various different solutions, only the height of the corresponding die head needs to be controlled on the moving device, and the same moving device is used for moving, so that the coating efficiency is greatly improved. Therefore, the same product to be coated can be coated with different solutions in a short time, the coating process time is shortened, and the coating efficiency is improved.

Description

Technical Field

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

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] At present, the slit coater is the mainstream equipment used for the preparation of large-area perovskite solar cell thin films. Slit coating is a process in which the coating die head moves precisely relative to the substrate, and the liquid chemical material is squeezed out from the gap between the upper and lower dies and coated on the substrate to form a thin film. However, the slit coater in the related art cannot coat different solutions on the same substrate in a short time, and there are problems such as long coating process time and low coating efficiency. Summary of the invention

[0004] In view of the problem, the present application provides a coating device and a battery production device, which can alleviate the problem of long coating process time and low coating efficiency.

[0005] In a first aspect, the present application provides a coating device, comprising:

[0006] A coating platform for placing the product to be coated;

[0007] A moving device capable of reciprocating along a first direction relative to the coating platform; and

[0008] A plurality of die heads are arranged on a mobile device, and the die heads are used to coat the product to be coated;

[0009] The height of each die head relative to the coating platform along a second direction intersecting the first direction can be adjusted independently.

[0010] In the above-mentioned coating equipment, since multiple die heads are integrated on the same mobile device and the height of each die head relative to the coating platform can be independently adjusted, when a variety of different solutions need to be coated on the product to be coated, it is only necessary to control the height of the corresponding die head on the mobile device and use the same mobile device to move and then carry out coating. Therefore, the space occupied by the equipment is reduced, and different solutions can be coated on the same product to be coated in a short time, thereby shortening the coating process time and improving the coating efficiency.

[0011] In some embodiments, the moving device includes a first pre-coating position and a second pre-coating position during the moving process, and the first pre-coating position and the second pre-coating position are respectively located at two ends of the coating platform along the first direction;

[0012] When in the first pre-coating position, one of the die heads can be lowered to the first coating position relative to the other die heads;

[0013] When in the second pre-coating position, another die head can be lowered to the second coating position relative to the remaining die heads.

[0014] When the mobile device is in the first pre-coating position, after one of the die heads descends to the first coating position, the mobile device can move along the first direction toward the second pre-coating position to coat the product to be coated once during the movement. When the mobile device is in the second coating position, another die head can descend to the second coating position, and the mobile device can move along the first direction toward the first pre-coating position to coat the product to be coated after the first coating during the movement. By using the die heads alternately in this way, the coating of different solutions can be completed more quickly. In addition, the descending die head can be closer to the product to be coated, and the extruded solution can be reduced during the coating process. The position of other die heads is affected and the uneven coating phenomenon occurs.

[0015] In some embodiments, the coating apparatus further includes a first pre-coating device and a second pre-coating device located at both ends of the coating platform along the first direction;

[0016] When in the first pre-coating position, the first pre-coating device can perform pre-coating treatment on the die head in the first coating position;

[0017] When in the second pre-coating position, the second pre-coating device can perform pre-coating treatment on the die head in the second coating position.

[0018] By providing the first pre-coating device and the second pre-coating device, the uniformity of coating the product to be coated by the die head during the coating process can be improved.

[0019] In some embodiments, the first pre-coating device includes a first pre-coating roller, the axial direction of the first pre-coating roller intersects both the first direction and the second direction, and the first pre-coating roller can perform pre-coating treatment on the die head in the first coating position; and / or

[0020] The second pre-coating device comprises a second pre-coating roller, the axial direction of the second pre-coating roller intersects both the first direction and the second direction, and the second pre-coating roller can perform pre-coating treatment on the die head at the second coating position.

[0021] Since the first pre-coating roller and the second pre-coating roller rotate at a uniform speed, the solution extruded from the die head can be made more uniform by arranging the first pre-coating roller and the second pre-coating roller to pre-coat the die head, thereby improving the coating quality in the subsequent coating process.

[0022] In some embodiments, the coating equipment further includes a plurality of lifting drive mechanisms all mounted on the mobile device, and the plurality of lifting drive mechanisms are connected to the plurality of die heads in a one-to-one correspondence.

[0023] By setting up a lifting drive mechanism, each die head can be independently controlled to move up and down relative to the coating platform along the second direction, so that the height of each die head relative to the coating platform along the second direction can be independently controlled more accurately and reliably.

[0024] In some embodiments, the coating apparatus further comprises a control device, which is communicatively connected to the plurality of die heads and is used to independently control the height of each die head relative to the coating platform along the second direction.

[0025] By setting the control device, the height of the die head can be automatically adjusted, making the height adjustment more accurate.

[0026] In some embodiments, the coating device further includes a control device, which is communicatively connected to the moving device to control the moving speed of the moving device along the first direction when different die heads coat the product to be coated.

[0027] In this way, the moving speed of each die head along the first direction during the coating process can be controlled, thereby achieving requirements such as different coating thicknesses and making the coating more uniform.

[0028] In some embodiments, the coating equipment also includes a control device and multiple injection devices, the multiple injection devices are connected to the multiple die heads one by one, and the control device is communicatively connected to the multiple injection devices to independently control the injection speed of each die head when coating the product to be coated.

[0029] By controlling the injection speed of each die head during the coating process, injection of different solutions is achieved, so that the die head can extrude the solution more stably.

[0030] In some embodiments, the coating apparatus further comprises an infrared lamp, which is mounted on the moving device and located between at least two adjacent die heads.

[0031] By arranging an infrared lamp between at least two adjacent die heads and installing the infrared lamp on a mobile device, the wet film formed on the product to be coated after coating can be heated in time to quickly solidify the wet film.

[0032] In some embodiments, the moving device includes a gantry moving device, and the plurality of die heads are mounted on the gantry moving device.

[0033] The structure of the gantry moving device is stable, so the die head thereon can move more stably during the coating process, resulting in better coating effect.

[0034] In a second aspect, a battery production device is provided, comprising the coating device in any of the above embodiments.

[0035] In the above-mentioned battery production equipment, since multiple die heads are integrated on the same mobile device and the control device can independently control the height of each die head relative to the coating platform, when it is necessary to coat the product to be coated with a variety of different solutions, it is only necessary to control the height of the corresponding die head on the mobile device and use the same mobile device to move and then carry out coating. Therefore, the space occupied by the equipment is reduced, and different solutions can be coated on the same product to be coated in a short time, thereby shortening the coating process time and improving the coating efficiency.

[0036] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0038] Figure 1 Schematic diagram of the structure of a coating device according to one or more embodiments.

[0039] Figure 2 for Figure 1 The cross-sectional structural schematic diagram of the coating equipment is shown.

[0040] Figure 3 for Figure 2 A partial enlarged view of the coating equipment shown.

[0041] Figure 4 for Figure 1 A schematic diagram of the side structure of the coating equipment is shown.

[0042] Figure 5 It is a schematic diagram of the cross-sectional structure when the No. 1 die head is in the first pre-coating position according to one or more embodiments.

[0043] Figure 6 for Figure 5 The cross-sectional structure diagram of die head No. 1 during coating is shown.

[0044] Figure 7 for Figure 5 The cross-sectional structure diagram of die head No. 2 when it is in the second pre-coating position is shown.

[0045] Figure 8 for Figure 7The cross-sectional structure diagram of the No. 2 die head during coating is shown.

[0046] The reference numerals in the specific implementation manner are as follows:

[0047] Coating equipment 100, coating platform 10, moving device 20, die head 30, cutter head 31, cutter head hanger 32, support base 35, first pre-coating device 40, first pre-coating roller 41, second pre-coating device 50, second pre-coating roller 51, lifting drive mechanism 60, lifting drive member 61, transmission assembly 62, screw rod 621, slider 622, guide rail 70, infrared lamp 80. DETAILED DESCRIPTION

[0048] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0050] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0051] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, 1 and / or 2 may represent: 1 exists alone, 1 and 2 exist at the same time, and 2 exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0053] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0054] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0055] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0056] At present, the main methods for preparing perovskite solar cells on a large scale include spray coating, scraper coating, slot coating, ink printing and inkjet printing, etc. Slot die coating is one of the simplest methods for industrial large-scale preparation of perovskite solar cells, with the advantages of short preparation process cycle, raw material saving and simple process operation.

[0057] Slit coating mainly involves allowing the solution to flow out of the slit-shaped nozzle of the die under a certain pressure, fall onto the substrate like a curtain, and then be transported on the substrate to form a thin film. However, the slit coaters in the related art usually have independently operated die heads and require separate movement, injection and other devices. When a substrate needs to be coated with a variety of different solutions, multiple independently operated coaters are required. And because there are requirements for the deposition time between some films, if multiple independently operated coaters are used, the time for substrate transportation will be increased, which is not conducive to film preparation. This not only results in a large footprint for the equipment, but also the inability to coat the same substrate with different solutions in a short period of time, and there are problems with long coating process time and low coating efficiency.

[0058] In order to alleviate the problems of long coating process time and low coating efficiency in the related art, the embodiment of the present application designs a coating device, including a coating platform, a moving device and a plurality of die heads. The coating platform is used to place the product to be coated, the moving device can reciprocate along a first direction relative to the coating platform, and the plurality of die heads are arranged on the moving device, and the die heads are used to coat the product to be coated, wherein each die head can independently adjust the height relative to the coating platform along a second direction intersecting with the first direction.

[0059] In this way, since multiple die heads are integrated on the same mobile device and the height of each die head relative to the coating platform can be adjusted independently, when a substrate needs to be coated with a variety of different solutions, it is only necessary to control the height of the corresponding die head on the mobile device and use the same mobile device to move and then perform coating. Therefore, the space occupied by the equipment is reduced, and different solutions can be coated on the same substrate in a short time, thereby shortening the coating process time and improving the coating efficiency.

[0060] Figure 1 It is a structural schematic diagram of a coating device according to one or more embodiments. Referring to the drawings, an embodiment of the present application provides a coating device 100, including a coating platform 10, a mobile device 20 and a plurality of die heads 30. The coating platform 10 is used to place the product to be coated. The mobile device 20 can reciprocate along a first direction relative to the coating platform. A plurality of die heads 30 are all arranged on the mobile device 20, and the die heads 30 are used to coat the product to be coated. Among them, each die head 30 can independently adjust the height relative to the coating platform 10 along a second direction intersecting with the first direction.

[0061] The coating platform 10 refers to a platform that can support and fix the product to be coated. Generally, one side surface of the coating platform 10 is used to place the product to be coated, such as the upper surface. When the product to be coated is placed on the coating platform 10, the coating platform 10 can fix the product to be coated by mechanical positioning or vacuum adsorption.

[0062] The product to be coated referred to in the embodiments of the present application may be a substrate of a perovskite solar cell module, or a substrate of other types of battery modules, etc.

[0063] The moving device 20 can reciprocate along a first direction relative to the coating platform, for example, from one end to the other end in the length direction of the coating platform 10. The moving device 20 can be a robot, a truss moving device, a moving vehicle, etc.

[0064] The die 30 refers to a mechanism for coating the solution on the product to be coated. Typically, the die 30 includes an upper die and a lower die, which are relatively combined to form a fluid cavity and a coating opening, and the solution can enter the fluid cavity and be squeezed out from the coating opening. When the product to be coated needs to be coated, the coating opening can be located directly above the product to be coated so that the extruded solution can be evenly coated on the product to be coated. In an embodiment of the present application, the die 30 includes a cutter head 31 and a cutter head hanger 32, and the cutter head hanger 32 is used to mount the cutter head 31. In some cases, the cutter head 31 can also be disassembled from the cutter head hanger 32, for example, by rotating the cutter head hanger 32 to disassemble the cutter head 31.

[0065] In addition, the first direction in which the moving device 20 moves relative to the coating platform 10 may be as follows: Figure 1 The X direction shown, the second direction can be as Figure 1 The Z direction is shown.

[0066] In this way, since multiple die heads 30 are integrated on the same mobile device 20 and the height of each die head 30 relative to the coating platform 10 can be independently adjusted, when a variety of different solutions need to be coated on the product to be coated, it is only necessary to control the height of the corresponding die head 30 on the mobile device 20 and use the same mobile device 20 to move and then perform coating. Therefore, the space occupied by the equipment is reduced, and different solutions can be coated on the same product to be coated in a short time, thereby shortening the coating process time and improving the coating efficiency.

[0067] According to some embodiments of the present application, the coating device 100 further includes a control device, which is communicatively connected to the plurality of die heads 30 and is used to independently control the height of each die head 30 relative to the coating platform 10 along the second direction.

[0068] The control device may be any suitable device capable of realizing the control function, for example, a PLC, a single chip microcomputer, etc. The control device may independently control the height of each die head 30 so that the die head 30 can move to a corresponding height position, thereby realizing coating or not coating so as not to affect coating of other die heads 30.

[0069] By providing a control device, the height of the die head 30 can be automatically adjusted, making the height adjustment more accurate.

[0070] In other embodiments, the height of the die head 30 may also be adjusted manually.

[0071] According to some embodiments of the present application, the moving device 20 includes a gantry moving device, and the plurality of die heads 30 are all installed on the gantry moving device.

[0072] The structure of the gantry moving device is stable, so the die head 30 thereon can move more stably during the coating process, resulting in a better coating effect.

[0073] Specifically, the gantry moving device includes a gantry driving mechanism and a gantry frame, a plurality of die heads 30 are mounted on the gantry frame, and the gantry driving mechanism is connected to the gantry frame to drive the gantry frame to move along the first direction.

[0074] The gantry frame includes a horizontal frame and two vertical frames, the two vertical frames are connected to the two ends of the horizontal frame, and the gantry drive mechanism is located on both sides of the coating platform 10 along the third direction and is connected to the two vertical frames respectively. The first direction, the second direction and the third direction intersect each other. Specifically, the third direction is Figure 3 Y direction shown.

[0075] In the embodiment of the present application, the coating device 100 further includes a support base 35, and the mobile device 20 is supported on the support base 35. Specifically, the support base 35 may be a marble base.

[0076] According to some embodiments of the present application, the moving device 20 includes a first pre-coating position and a second pre-coating position during the movement process, and the first pre-coating position and the second pre-coating position are respectively located at two ends of the coating platform 10 along the first direction. When in the first pre-coating position, one of the die heads 30 can be lowered to the first coating position relative to the other die heads 30. When in the second pre-coating position, another of the die heads 30 can be lowered to the second coating position relative to the other die heads 30.

[0077] The first pre-coating position and the second pre-coating position are positions where the die head 30 is ready to coat the product to be coated.

[0078] Specifically, when the moving device 20 moves to the first pre-coating position and the second pre-coating position, the projections of the plurality of die heads 30 along the second direction are outside the coating platform 10. In this way, it is possible to avoid the solution flowing from the die head 30 to the product to be coated on the coating platform 10 before coating, causing coating failure of the product to be coated.

[0079] The first coating position and the second coating position are height positions at which the corresponding die head 30 can coat the product to be coated.

[0080] When the mobile device 20 is in the first pre-coating position, after one die head 30 is lowered to the first coating position, the mobile device 20 can move along the first direction toward the second pre-coating position to coat the product to be coated once during the movement. When the mobile device 20 is in the second coating position, another die head 30 can be lowered to the second coating position, and the mobile device 20 can move along the first direction toward the first pre-coating position to coat the product to be coated after the first coating during the movement. By using the die head 30 alternately in this way, the coating of different solutions can be completed more quickly. In addition, the descending die head 30 can be closer to the product to be coated, and the extruded solution can reduce the influence of the position of other die heads 30 during the coating process to produce uneven coating.

[0081] Specifically, when in the first pre-coating position, the control device can control one of the die heads 30 to descend to the first coating position relative to the other die heads 30. When in the second pre-coating position, the control device can control another of the die heads 30 to descend to the second coating position relative to the other die heads 30.

[0082] In other embodiments, the moving device 20 may also have a pre-coating position only at one end of the coating platform 10 along the first direction, and each die head 30 needs to return to the same pre-coating position to perform a descending movement to perform a coating operation.

[0083] Further, when in the first pre-coating position, one of the die heads 30 can be lowered to the first coating position relative to the other die heads 30, and the other die heads 30 can be raised or maintained at the first uncoated position. When in the second pre-coating position, another of the die heads 30 can be lowered to the second coating position relative to the other die heads 30, and the other die heads 30 can be raised or maintained at the second uncoated position.

[0084] The first uncoated position and the second uncoated position are height positions at which the corresponding die head 30 cannot coat the product to be coated.

[0085] By controlling only the die head 30 that needs to be coated to descend to the coating position and raising or maintaining the remaining die heads 30 at the coating position, the influence of the remaining die heads 30 on the position of the die head 30 that needs to be coated can be further reduced.

[0086] According to some embodiments of the present application, the coating device 100 further includes a first pre-coating device 40 and a second pre-coating device 50 located at both ends of the coating platform 10 along the first direction. When in the first pre-coating position, the first pre-coating device 40 can perform pre-coating treatment on the die head 30 in the first coating position. When in the second pre-coating position, the second pre-coating device 50 can perform pre-coating treatment on the die head 30 in the second coating position.

[0087] The first pre-coating device 40 and the second pre-coating device 50 are devices for homogenizing the solution extruded from the die head 30 before the die head 30 performs main coating.

[0088] By providing the first pre-coating device 40 and the second pre-coating device 50 , the uniformity of coating the product to be coated by the die head 30 during the coating process can be improved.

[0089] Specifically, the first pre-coating device 40 includes a first pre-coating roller 41, the axial direction of the first pre-coating roller 41 intersects both the first direction and the second direction, and the first pre-coating roller 41 can perform pre-coating treatment on the die head 30 in the first coating position. In actual application, the first pre-coating roller 41 will contact the bottom of the die head 30 in the first coating position to perform pre-coating treatment.

[0090] In addition, the first pre-coating roller 41 is a cylindrical structure that can rotate around its axis.

[0091] The axial direction of the first pre-coating roller 41 can be Figure 1 The first direction, the second direction and the axial direction of the first pre-coating roller 41 may be perpendicular to each other.

[0092] Similarly, the second pre-coating device 50 may also include a second pre-coating roller 51, the axial direction of the second pre-coating roller 51 intersects both the first direction and the second direction, and the second pre-coating roller 51 can perform pre-coating treatment on the die head 30 in the second coating position. In actual application, the second pre-coating roller 51 will contact the bottom of the die head 30 in the second coating position for pre-coating treatment.

[0093] Since the first pre-coating roller 41 and the second pre-coating roller 41 rotate at a uniform speed, the solution extruded from the die head 30 can be made more uniform by setting the first pre-coating roller 41 and the second pre-coating roller 41 to pre-coat the die head 30, thereby improving the coating quality in the subsequent coating process.

[0094] See also Figure 2 and Figure 3 According to some embodiments of the present application, the coating device 100 further includes a plurality of lifting drive mechanisms 60 which are all installed on the mobile device 20 , and the plurality of lifting drive mechanisms 60 are connected to the plurality of die heads 30 in a one-to-one correspondence.

[0095] Combination Figure 4 The lifting drive mechanism 60 refers to a mechanism that can drive an object to perform lifting motion. The lifting drive mechanism 60 generally includes a lifting drive member 61 and a transmission assembly 62. The transmission assembly 62 is connected to the die head 30. The lifting drive member 61 is connected to the transmission assembly 62 to drive the transmission assembly 62 to drive the die head 30 to perform lifting motion.

[0096] By providing the lifting drive mechanism 60 , each die head 30 can be controlled to move up and down relative to the coating platform 10 along the second direction, so that the height of each die head 30 relative to the coating platform 10 along the second direction can be independently controlled more accurately and reliably.

[0097] Specifically, the control device is connected to the plurality of lifting drive mechanisms 60 for independently controlling each die head 30 to move up and down relative to the coating platform 10 along the second direction.

[0098] In other embodiments, the lifting drive mechanism 60 may also be replaced by a rotating drive mechanism, etc., to change the height of the die head 30 relative to the coating platform 10 along the second direction.

[0099] Specifically in the embodiment of the present application, the transmission assembly 62 includes a screw rod 621 and a slider 622. The die head 30 is connected to the slider 622. The screw rod 621 cooperates with the slider 622. The lifting drive member 61 is connected to the screw rod 621. The lifting drive member 61 can drive the screw rod 621 to rotate to drive the slider 622 to move along the second direction, thereby driving the die head 30 to perform lifting movement along the second direction.

[0100] The lifting drive member 61 , the screw rod 621 and the slider 622 are arranged to cooperate to realize the lifting movement of the die head 30 , which is simple and reliable.

[0101] Specifically, each lifting drive mechanism 60 may include two sets of lifting drive members 61 and transmission components 62, and the two sets of lifting drive members 61 and transmission components 62 are arranged at intervals along the extension direction of the die head 30, so that the die head 30 is evenly stressed and more stable during the lifting movement. The extension direction of the die head 30 may be a third direction, which intersects both the first direction and the second direction. For example, the third direction is Figure 1 Y direction shown.

[0102] In some embodiments, in order to make the lifting process of the die head 30 more stable, a guide rail 70 is further provided on one side of the screw rod 621, and the guide rail 70 cooperates with the die head 30 to guide the die head 30 to move up and down along the second direction. Specifically, the guide rail 70 is arranged parallel to the screw rod 621.

[0103] According to some embodiments of the present application, the coating device further includes a control device, which is communicatively connected to the mobile device 20 to control the moving speed of the mobile device 20 along the first direction when different die heads 30 coat the coated product.

[0104] In this way, the moving speed of each die head 30 along the first direction during the coating process can be controlled, thereby achieving requirements such as different coating thicknesses and making the coating more uniform.

[0105] According to some embodiments of the present application, the coating equipment 100 also includes a control device and multiple liquid injection devices, the multiple liquid injection devices are connected to the multiple die heads 30 in a one-to-one correspondence, and the control device is communicatively connected to the multiple liquid injection devices to independently control the injection speed of each die head 30 when coating the product to be coated.

[0106] The liquid injection device is a device for injecting a solution into the die head 30. Specifically, the liquid injection device may include a storage tank, a liquid injection pump, a feed pipe and a control valve, and the feed pipe is sequentially connected to the storage tank, the liquid injection pump and the control valve and then connected to the die head 30. The control device may be communicatively connected to the control valve and the liquid injection pump to control the solution in the storage tank to be added to the die head 30.

[0107] The embodiment of the present application can control the injection speed of each die head 30 during the coating process, thereby achieving the injection of different solutions, so that the die head 30 can extrude the solution more stably.

[0108] According to some embodiments of the present application, the coating device 100 further includes an infrared lamp 80 , which is installed on the moving device 20 and located between at least two adjacent die heads 30 .

[0109] The infrared lamp 80 refers to a lamp structure capable of emitting infrared light. The infrared lamp 80 may be a single one or may include a plurality of lamps to form a lamp group structure.

[0110] By arranging an infrared lamp 80 between at least two adjacent die heads 30 and mounting the infrared lamp 80 on the moving device 20 , the wet film formed on the product to be coated after coating can be heated in time so that the wet film can be cured quickly.

[0111] Furthermore, the infrared lamp 80 is communicatively connected to the control device, and the control device is used to control the on and off of the infrared lamp 80 .

[0112] In some cases, when the wet film thickness is thin or the solution material can be cured quickly after encountering air, the control device can turn off the infrared lamp 80 to heat and cure the wet film. In some cases, when the wet film thickness is thick or the solution material is not easy to cure, the control device can turn on the infrared lamp 80 to heat and cure the wet film.

[0113] In order to more clearly understand the embodiments of the present application, the use process of the coating device 100 of a specific embodiment is described as follows:

[0114] Figure 5 This is a schematic diagram of the cross-sectional structure when the die head No. 1 is in the first pre-coating position according to one or more embodiments. When the die head No. 1 30 is ready to coat the solution 1, the lifting drive mechanism 60 raises the die head No. 2 30 and lowers the die head No. 1 30 to the first pre-coating device 40 for pre-coating preparation.

[0115] Figure 6 for Figure 5 The cross-sectional structure diagram of die head No. 1 during coating is shown, and the gantry moving device drives die head No. 1 and die head No. 2 30 to perform coating movement. At this time, the heights of the two die heads 30 are kept consistent with the previous pre-coating, and the injection mechanism injects liquid into die head No. 1 30 to coat solution 1. Figure 7 for Figure 5 The cross-sectional structure diagram of the second die head in the second pre-coating position is shown. After the coating of the first die head 30 is completed, the lifting drive mechanism 60 lifts the first die head 30 and lowers the second die head 30 to the second pre-coating device 50 to prepare the second die head 30 for pre-coating. Figure 8 for Figure 7 The cross-sectional structure diagram of the No. 2 die head during coating is shown in FIG. The gantry moving device drives the No. 1 and No. 2 die heads 30 to perform coating movements. Figure 6 The gantry moving device moves in the opposite direction, the height of the die head 30 is kept consistent with the previous pre-coating, and the injection mechanism injects liquid into the second die head 30 to apply solution 2. The coating of solutions 1 and 2 is carried out back and forth to complete a double-layer coating action.

[0116] According to some embodiments of the present application, referring to Figures 4 to 8 , provides a battery production device, including the coating device 100 in any of the above embodiments.

[0117] In this way, since the multiple die heads 30 of the coating equipment 100 are integrated on the same mobile device 20 and the height of each die head 30 relative to the coating platform 10 can be independently adjusted, when a variety of different solutions need to be coated on the product to be coated, it is only necessary to control the height of the corresponding die head 30 on the mobile device 20 and use the same mobile device 20 to move and then perform coating. Therefore, the space occupied by the equipment is reduced, and different solutions can be coated on the same product to be coated in a short time, thereby shortening the coating process time and improving the coating efficiency.

[0118] In the embodiment of the present application, the product to be coated may be a substrate of a pole piece, and the substrate of the pole piece may form a pole piece after being coated by the coating device 100. The pole piece may form a positive pole piece or a negative pole piece of a battery after die cutting and slitting.

[0119] Specifically, the battery production equipment also includes a substrate unwinding mechanism for conveying the substrate to the coating equipment 100; the battery production equipment also includes a drying equipment for drying the coated substrate to form a pole piece; the battery production equipment also includes a pole piece winding mechanism for winding the dried pole piece.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A coating device, characterized in that: include: A coating platform for placing the product to be coated; A moving device capable of reciprocating along a first direction relative to the coating platform; as well as A plurality of die heads, each of which is disposed on the mobile device, and the die heads are used to coat the product to be coated; Wherein, the height of each die head relative to the coating platform along a second direction intersecting with the first direction can be adjusted independently.

2. The coating device according to claim 1, characterized in that: The moving device includes a first pre-coating position and a second pre-coating position during the moving process, wherein the first pre-coating position and the second pre-coating position are respectively located at two ends of the coating platform along the first direction; When in the first pre-coating position, one of the die heads can be lowered to the first coating position relative to the other die heads; When in the second pre-coating position, another one of the die heads can be lowered to the second coating position relative to the remaining die heads.

3. The coating device according to claim 2, characterized in that: The coating device further comprises a first pre-coating device and a second pre-coating device located at two ends of the coating platform along the first direction; When in the first pre-coating position, the first pre-coating device can perform pre-coating treatment on the die head in the first coating position; When located at the second pre-coating position, the second pre-coating device can perform pre-coating treatment on the die head located at the second coating position.

4. The coating device according to claim 3, characterized in that: The first pre-coating device comprises a first pre-coating roller, the axial direction of the first pre-coating roller intersects both the first direction and the second direction, and the first pre-coating roller can perform pre-coating treatment on the die head at the first coating position; and / or The second pre-coating device comprises a second pre-coating roller, the axial direction of the second pre-coating roller intersects both the first direction and the second direction, and the second pre-coating roller can perform pre-coating treatment on the die head at the second coating position.

5. The coating device according to any one of claims 1 to 4, characterized in that: The coating equipment further includes a plurality of lifting drive mechanisms which are all installed on the moving device, and the plurality of lifting drive mechanisms are connected to the plurality of die heads in a one-to-one correspondence.

6. The coating device according to any one of claims 1 to 4, characterized in that: The coating equipment further comprises a control device, which is communicatively connected with the plurality of die heads and is used for independently controlling the height of each die head relative to the coating platform along the second direction.

7. The coating device according to any one of claims 1 to 4, characterized in that: The coating equipment further includes a control device, which is communicatively connected with the moving device to control the moving speed of the moving device along the first direction when different die heads coat the product to be coated.

8. The coating device according to any one of claims 1 to 4, characterized in that: The coating equipment also includes a control device and multiple injection devices, the multiple injection devices are connected to the multiple die heads one by one, and the control device is communicatively connected to the multiple injection devices to independently control the injection speed of each die head when coating the product to be coated.

9. The coating device according to any one of claims 1 to 4, characterized in that: The coating equipment further comprises an infrared lamp, which is installed on the moving device and located between at least two adjacent die heads.

10. The coating device according to any one of claims 1 to 4, characterized in that: The moving device comprises a gantry moving device, and the plurality of die heads are all installed on the gantry moving device.

11. A battery production device, characterized in that: The coating device comprises the coating device as claimed in any one of claims 1 to 10.

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