Coating device and battery production system

Abstract

The embodiments of the present application provide a coating device and a battery production system, which relate to the field of battery technology. The coating device includes a coating die, and the coating die includes a die assembly, a first fastener, a first limit assembly, and an adjustment assembly. The first limit assembly of the present application can limit the movement of the first die relative to the first fastener and the second die along the first direction. When it is necessary to adjust the position of the first die on the second die, the restriction on the first die along the first direction is released by the action of the first limit assembly, and then the first die is driven to move along the first direction by the adjustment assembly, thereby realizing the automatic adjustment of the position of the first die. Compared with the related art of manually releasing the limit and adjusting the position of the first die, the adjustment efficiency and accuracy are higher, and manpower can be liberated.

Description

Technical Field

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

[0002] In the production process of the pole pieces of the battery device, the pole pieces need to be coated by a coating device. Taking the extrusion coating device as an example, during coating, the position of the upper die head needs to be adjusted so as to adjust the distance between the upper die head and the coating roller.

[0003] The related technology realizes the adjustment of the upper die position through manual adjustment, but the adjustment efficiency is low and the adjustment accuracy is poor. Therefore, how to improve the efficiency and accuracy of the upper die position adjustment is a research direction in battery technology. Utility Model Content

[0004] The present application provides a coating device and a battery production system, which can improve the efficiency and accuracy of upper die position adjustment.

[0005] In the first aspect, an embodiment of the present application provides a coating device, including a coating die head, wherein the coating die head includes a die head assembly, a first fastener, a first limit assembly and an adjustment assembly, wherein the die head assembly includes a first die head and a second die head, wherein the first die head is installed on the second die head and is provided with a first adjustment hole; the first fastener is passed through the first adjustment hole and is connected to the second die head, and there is a first adjustment gap along a first direction between the first fastener and the hole wall of the first adjustment hole, and the first direction intersects with the arrangement direction from the first die head to the second die head; the first limit assembly is connected to the first die head, and the first limit assembly is connected to the first fastener in a first locked state to limit the movement of the first die head along the first direction, and is disconnected from the first fastener in a first unlocked state to enable the first die head to move along the first direction; the adjustment assembly is installed on the second die head and connected to the first die head, and the adjustment assembly is used to drive the first die head to move along the first direction.

[0006] The above technical solution is configured with a first limit component and an adjustment component. The first limit component can limit the movement of the first die head relative to the first fastener and the second die head along the first direction. When it is necessary to adjust the position of the first die head on the second die head, the restriction on the first direction of the first die head is released through the action of the first limit component, and then the first die head is driven to move along the first direction through the adjustment component, thereby realizing automatic adjustment of the position of the first die head. Compared with the related art of manually releasing the limit and adjusting the position of the first die head, the adjustment efficiency and accuracy are higher, and manpower can be liberated.

[0007] In some embodiments of the present application, the first limiting assembly includes a first motion mechanism and a first limiting mechanism, the first motion mechanism is connected to the first die head, the first limiting mechanism is connected to the first motion mechanism, and moves driven by the first motion mechanism, in the first locking state, the first limiting mechanism and the first fastener are limited in the first direction, and in the first unlocking state, the first limiting mechanism and the first fastener are released from the limiting cooperation.

[0008] By adopting the above technical solution, the first limiting assembly is designed to include a first motion mechanism and a first limiting mechanism. The first motion mechanism drives the first limiting mechanism to move to a locked position or an unlocked position, thereby achieving limiting or releasing the limiting of the first die head in a first direction. The structure is simple and easy to implement.

[0009] In some embodiments of the present application, the first limiting mechanism includes a first limiting member and a second limiting member, the first limiting member is used to abut against one of the opposite sides of the first fastener, and the second limiting member is used to abut against the other side of the first fastener.

[0010] By adopting the above technical solution, the first limit member and the second limit member can be used to limit the opposite sides of the first fastener respectively, so as to fix the position of the first die head in the first direction. Not only is the structure simple, but the first limit member and the second limit member can form a clamping space matching the first fastener, which is beneficial to the connection and release of the first limit mechanism and the first fastener.

[0011] In some embodiments of the present application, the first limiting mechanism further includes a first mounting member, the first mounting member is connected to the first motion mechanism, and the first limiting member and the second limiting member are connected to the first mounting member.

[0012] By adopting the above technical solution, a first mounting member is configured, and the first limiting member and the second limiting member are conveniently connected to the first motion mechanism respectively through the first mounting member.

[0013] In some embodiments of the present application, the first motion mechanism is a linear reciprocating motion mechanism.

[0014] By adopting the above technical solution, the first motion mechanism is designed as a linear reciprocating motion mechanism, and the first limiting mechanism is driven to move to connect or release the connection with the first fastener through the linear reciprocating motion of the first motion mechanism. Compared with other motion modes, the linear motion stroke is shorter, the action is faster, and it occupies less working space.

[0015] In some embodiments of the present application, the first limiting assembly further includes a first mounting frame, the first mounting frame is connected to the first die head, and the first motion mechanism is mounted on the first mounting frame.

[0016] By adopting the above technical solution, the first movement mechanism and the first die head are conveniently connected via the first mounting frame.

[0017] In some embodiments of the present application, the first adjustment gap is a circumferential gap between the first fastener and the first adjustment hole.

[0018] By adopting the above technical solution, a circumferential adjustment gap is provided between the first fastener and the hole wall of the first adjustment hole, so that the first die head can be adjusted in multiple directions with better adjustment freedom.

[0019] In some embodiments of the present application, the coating device also includes a second fastener and a second limiting assembly, the first die head is provided with a second adjustment hole, the second fastener is passed through the second adjustment hole and is connected to the second die head, a second circumferential adjustment gap is provided between the second fastener and the hole wall of the second adjustment hole, the second limiting assembly is connected to the first die head, the second limiting assembly is connected to the second fastener in the second locked state to limit the movement of the first die head along the second direction, and is disconnected from the second fastener in the second unlocked state to enable the first die head to move along the second direction, the second direction intersects with the arrangement direction from the first die head to the second die head, and intersects with the first direction.

[0020] By adopting the above technical solution, the coating device is designed to also include a second fastener and a second limiting assembly. The second limiting assembly can limit the movement of the first die head relative to the first fastener and the second die head along the second direction. When it is necessary to adjust the position of the first die head along the second direction, the restriction on the first die head along the second direction is released through the action of the second limiting assembly, thereby locking the position of the first die head in the second direction. Moreover, when it is necessary to adjust the position of the first die head in the second direction, the second limiting assembly can be used to automatically unlock the device.

[0021] In some embodiments of the present application, the second limiting assembly includes a second motion mechanism and a second limiting mechanism, the second motion mechanism is connected to the first die head, the second limiting mechanism is connected to the second motion mechanism, and moves driven by the second motion mechanism, in the second locked state, the second limiting mechanism cooperates with the second fastener to limit the position in the second direction, and in the second unlocked state, the second limiting mechanism releases the limiting cooperation with the second fastener.

[0022] By adopting the above technical solution, the second limiting assembly is designed to include a second motion mechanism and a second limiting mechanism. The second motion mechanism drives the second limiting mechanism to move to a locked position or an unlocked position, thereby realizing limiting or releasing the limiting of the first die head in the second direction. The structure is simple and easy to implement.

[0023] In some embodiments of the present application, the second motion mechanism is a linear reciprocating motion mechanism.

[0024] By adopting the above technical solution, the second motion mechanism is designed as a linear reciprocating motion mechanism, and the second limiting mechanism is driven to move to connect or release the connection with the second fastener through the linear reciprocating motion of the second motion mechanism. Compared with other motion modes, the linear motion stroke is shorter, the action is faster, and it occupies less working space.

[0025] In some embodiments of the present application, the adjustment assembly includes a third motion mechanism, which is installed on the second die head and connected to the first die head, and the third motion mechanism is used to drive the first die head to move along the first direction.

[0026] By adopting the above technical solution, the third motion mechanism is used to drive the first die head to move along the first direction, thereby achieving the adjustment of the position of the first die head along the first direction.

[0027] In some embodiments of the present application, the third motion mechanism is a linear reciprocating motion mechanism.

[0028] By adopting the above technical solution, the third motion mechanism is designed as a linear reciprocating motion mechanism, which drives the first die head to adjust its position through linear reciprocating motion. Compared with other motion modes, the linear motion stroke is shorter, the action is faster, and it occupies less working space.

[0029] In some embodiments of the present application, the coating device further includes a displacement measuring device, and the displacement measuring device is used to measure and display the displacement of the third motion mechanism performing linear motion.

[0030] By adopting the above technical solution, the displacement measuring member is used to measure the displacement of the third motion mechanism, so that the motion stroke of the third motion mechanism can be controlled more accurately.

[0031] In some embodiments of the present application, the coating device further includes a feeding structure and a conveying structure, wherein the feeding structure is used to provide coating slurry to the coating die head, and the conveying structure is used to provide the substrate to be coated to the coating die head.

[0032] By adopting the above technical solution, the coating slurry is provided to the coating die head by the feeding structure, and the substrate to be coated is provided to the coating die head by the conveying structure. The coating die head can coat the substrate, thereby achieving substrate coating.

[0033] In a second aspect, an embodiment of the present application provides a battery production system, comprising a coating device as described in the above technical solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0035] Figure 1 A side view of a coating die head of a coating device provided in some embodiments of the present application;

[0036] Figure 2 A rear view of a coating die head of a coating device provided in some embodiments of the present application;

[0037] Figure 3 A partial cross-sectional view of a coating die head of a coating device provided in some embodiments of the present application;

[0038] Figure 4 A schematic diagram of the structure of a first adjustment hole and a first fastener of a coating device provided in some embodiments of the present application;

[0039] Figure 5 A schematic diagram of the structure of a second adjustment hole and a second fastener of a coating device provided in some embodiments of the present application;

[0040] Figure 6 A schematic diagram of the structure of the first limit assembly and the second limit assembly of the coating die head provided in some embodiments of the present application in their respective locked states;

[0041] Figure 7 for Figure 6 A magnified view of part a;

[0042] Figure 8 A schematic diagram of the structure of the first limit assembly and the second limit assembly of the coating die head provided in some embodiments of the present application in their respective unlocked states;

[0043] Fig. 9 for Figure 8 A magnified view of part b;

[0044] Fig.10 A schematic diagram of the structure of a coating device provided in some embodiments of the present application.

[0045] The reference numerals of the specific embodiments are as follows:

[0046] 1000. coating device;

[0047] 100. Coating die head;

[0048] 10. die assembly; 11. first die; 111. first adjustment hole; 112. second adjustment hole; 113. first adjustment gap; 114. second adjustment gap; 12. second die; 13. third die; 14. movable hinge; 15. connecting back plate; 16. first gasket; 17. second gasket; 18. first feed pipe; 19. second feed pipe;

[0049] 20. A first fastener;

[0050] 30. First limiting assembly; 31. First motion mechanism; 311. First driving unit; 312. First linear motion unit; 32. First limiting mechanism; 321. First limiting member; 322. Second limiting member; 323. First mounting member; 33. First mounting frame;

[0051] 40. Adjustment assembly; 41. Third motion mechanism; 411. Second drive unit; 412. Transmission unit; 413. Second linear motion unit; 42. Third mounting bracket;

[0052] 50. A second fastener;

[0053] 60, second limiting assembly; 61, second movement mechanism; 62, second limiting mechanism; 621, second mounting member; 622, third limiting member; 623, fourth limiting member; 63, second mounting frame;

[0054] 70. Displacement measuring parts;

[0055] 200, feeding structure;

[0056] 300. Conveying structure;

[0057] X, first direction; Y, second direction; Z, width direction. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0059] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0060] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0061] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0063] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0064] The term “plurality” used in this application refers to two or more (including two).

[0065] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a battery box for encapsulating one or more battery cells. The battery box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0066] The battery cells mentioned in the embodiments of the present application may be lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells or magnesium-ion battery cells, etc., which are not limited in the embodiments of the present application. The battery cells may be cylindrical, flat, cuboid or other shapes, which are not limited in the embodiments of the present application.

[0067] The battery cell mentioned in the embodiments of the present application may include an electrode assembly and an electrolyte, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector; the positive current collector includes a positive electrode coating area and a positive electrode ear connected to the positive electrode coating area, the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode ear is not coated with a positive electrode active material layer. Taking a lithium-ion battery cell as an example, the material of the positive current collector can be aluminum, and the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, and the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with a negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.

[0068] The battery cells described in the embodiments of the present application are suitable for batteries and electrical devices using batteries. Electrical devices may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0069] Below, the embodiments of the present application are described in detail.

[0070] At present, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0071] During the production process of the battery device, it is necessary to coat the pole piece through a coating device. The coating die may include a first die and a second die connected to each other. The first die and the second die are connected by fasteners such as fastening screws. There is a circumferential adjustment gap between the first die and the fastener, and the first die and the fastener are connected by a fastening structure.

[0072] During the coating process, the distance between the first die head and the coating roller needs to be adjusted to adjust the width of the film area where the upper slurry is coated on the current collector. When adjusting the position of the first die head, it is necessary to manually release the connection between the fastening structure and the fastener, and then manually adjust the position of the first die head, which is not only inefficient and wastes manpower, but also has poor adjustment accuracy.

[0073] Therefore, how to improve the efficiency and accuracy of the first die position adjustment is an important issue in battery production and processing.

[0074] In view of this, the present application provides a technical solution, which is equipped with a first limit component and an adjustment component. When the position of the first die head needs to be adjusted, the first limit component is unlocked to make the position of the first die head adjustable, and the position of the first die head is adjusted by the adjustment component. After the adjustment, the first die head can be locked again by the first limit component, thereby realizing the automation of the position adjustment of the first die head and improving the adjustment efficiency. Moreover, compared with the manual adjustment method, the mechanized adjustment has better adjustment accuracy.

[0075] The following is combined with Figure 1-10 The coating device provided in this embodiment is introduced.

[0076] Combined with Figure 1-5 As shown, the embodiment of the present application provides a coating device 1000, including a coating die 100, the coating die 100 includes a die assembly 10, a first fastener 20, a first limit assembly 30 and an adjustment assembly 40, the die assembly 10 includes a first die 11 and a second die 12, the first die 11 is installed on the second die 12, and is provided with a first adjustment hole 111; the first fastener 20 is passed through the first adjustment hole 111 and connected to the second die 12, and a first adjustment hole 111 is provided between the first fastener 20 and the hole wall of the first adjustment hole 111 along the first direction X The gap 113, the first direction X intersects with the arrangement direction from the first die head 11 to the second die head 12; the first limit assembly 30 is connected to the first die head 11, and the first limit assembly 30 is connected to the first fastener 20 in the first locked state to limit the movement of the first die head 11 along the first direction X, and is disconnected from the first fastener 20 in the first unlocked state to enable the first die head 11 to move along the first direction X; the adjustment assembly 40 is installed on the second die head 12 and connected to the first die head 11, and the adjustment assembly 40 is used to drive the first die head 11 to move along the first direction X.

[0077] The coating die 100 is mainly used to coat the slurry on the substrate. The substrate can be the shape of the battery device pole piece before processing, and the coating die 100 can adjust the coating parameters such as the width and speed.

[0078] The coating die 100 of this embodiment may be an extrusion die. In addition to the above-mentioned first die 11 and second die 12, in some embodiments, the coating die 100 may also include a third die 13. The first die 11, the second die 12 and the third die 13 are arranged in sequence from top to bottom.

[0079] like Figure 2 As shown in FIG, the first die head 11 and the third die head 13 can be connected via a movable hinge 14, which can connect the first die head 11 and the third die head while allowing the first die head 11 to move.

[0080] The first die head 11 and the second die head 12 can be connected via a connecting back plate 15, which allows the first die head 11 to move within a certain range relative to the second die head 12 to achieve a movable connection. For example, the connecting back plate 15 can be plugged into the first die head 11 and the second die head 12 via a plug-in component, thereby allowing the first die head 11 to move along the plug-in direction (for example, the first direction X).

[0081] A first gasket 16 is connected to the lower side of the first die 11 and can move on the second die 12 along with the movement of the first die 11. The first gasket 16 is provided with an upper coating opening (not shown in the figure). A second gasket 17 is connected to the lower side of the second die 12 and is provided with a lower coating opening.

[0082] The coating die 100 also includes a first feed tube 18 and a second feed tube 19. The feed from the first feed tube 18 enters between the first die 11 and the second die 12, and flows out from the gap between the first die 11 and the second die 12 through the upper coating opening. The feed from the second feed tube 19 enters between the second die 12 and the third die 13, and flows out from the gap between the second die 12 and the third die 13 through the lower coating opening.

[0083] The first fastener 20 may be a bolt, a screw, an anchor or other fasteners. This embodiment is described by taking a screw as an example.

[0084] The first die head 11 is provided with a first adjustment hole 111, the first fastener 20 is passed through the first adjustment hole 111 and is connected to the second die head 12, and a first adjustment gap 113 is provided between the first fastener 20 and the hole wall of the first adjustment hole 111 along the first direction X. For example, the size of the first adjustment hole 111 along the first direction X can be designed to be larger than the first fastener 20, or the first adjustment hole 111 can be designed to have a larger aperture than the first fastener 20, so that the first adjustment hole 111 and the first fastener 20 form a circumferential gap including the first direction X.

[0085] The first direction X intersects with the arrangement direction of the first die head 11 to the second die head 12. It can be understood that the first direction X and the arrangement direction of the first die head 11 to the second die head 12 ( Figure 1 The angle between the upper and lower directions (in the direction from top to bottom) is greater than zero and less than or equal to ninety degrees.

[0086] In some embodiments, the first direction X depends on the inclination angle of the lower side of the first die head 11. When the lower side of the first die head 11 is in an inclined state as shown in the figure, the first direction X is consistent with the inclination direction of the lower side of the first die head 11, and the projection of the first direction X in the horizontal direction is Figure 2 The width direction Z of the middle coating die head 100 is consistent.

[0087] The first direction X may be a direction having two opposite sub-directions, or may be a direction having only one sub-direction (this form is not shown in the figure). This embodiment is described by taking the first direction X having two opposite sub-directions as an example, that is, the adjustment component 40 of this embodiment can drive the first die head 11 to move back and forth along the two opposite sub-directions of the first direction X.

[0088] The first limiting assembly 30 is connected to the first die head 11 , and the connection mode may be direct connection or indirect connection. The first limiting assembly 30 is configured to be able to move between a first locking state and a first unlocking state.

[0089] Combined with Figure 5 As shown, in the first locking state, the first limit assembly 30 is connected to the first fastener 20, forming an indirect connection between the first limit member 321 and the first fastener 20, so that the first die head 11 cannot move relative to the first fastener 20 along the first direction X, and the first fastener 20 cannot produce relative movement with the first adjustment gap 113 along the first direction X, thereby achieving the locking of the position of the first die head 11 in the first direction X.

[0090] Combined with Figure 6 As shown, in the first unlocking state, the first limit assembly 30 and the first fastener 20 are disconnected, so that the first die head 11 can move along the first direction X, and then the first die head 11 is driven to move along the first direction X by the adjustment assembly 40. At this time, the first fastener 20 and the first adjustment gap 113 produce relative movement in the first direction X, thereby realizing automatic adjustment of the position of the first die head 11. Compared with the related art of manually releasing the limit and adjusting the position of the first die head 11, the adjustment efficiency and accuracy are higher, and manpower can be liberated.

[0091] In some examples, optionally, the first limiting assembly 30 includes a first moving mechanism 31 and a first limiting mechanism 32, the first moving mechanism 31 is connected to the first die head 11, the first limiting mechanism 32 is connected to the first moving mechanism 31, and moves driven by the first moving mechanism 31. In the first locked state, the first limiting mechanism 32 and the first fastener 20 are limited in the first direction X, and in the first unlocked state, the first limiting mechanism 32 and the first fastener 20 are released from the limiting cooperation.

[0092] The number of the first limiting components 30 can be one or more. For example, one first limiting component 30 can be located on one side of the coating die 100 along the length direction. For another example, the two first limiting components 30 in the figure can be located on both sides of the coating die 100 along the length direction respectively.

[0093] Correspondingly, the first fastener 20 may also be located on one side or both sides of the coating die head 100 along the length direction.

[0094] The first movement mechanism 31 refers to a structure that can drive the first limiting mechanism 32 to move along the first direction X and the second direction Y.

[0095] The first limiting mechanism 32 refers to a mechanism that can form a limiting fit with the first fastener 20 along the first direction X when it moves to connect with the first fastener 20, so that the first movement mechanism 31 and the first limiting mechanism 32 form an intermediate structure connecting the first fastener 20 and the first die 11, thereby allowing the first die 11 to be fixed relative to the first fastener 20.

[0096] The first movement mechanism 31 drives the first limiting mechanism 32 to move to the locking position or the unlocking position, thereby limiting or releasing the first die head 11 in the first direction X. The structure is simple and easy to implement.

[0097] Combined with Figure 6-9 As shown, in some examples, optionally, the first limiting mechanism 32 includes a first limiting member 321 and a second limiting member 322, the first limiting member 321 is used to abut against one of the opposite sides of the first fastener 20, and the second limiting member 322 is used to abut against the other side of the first fastener 20.

[0098] The first limiting member 321 and the second limiting member 322 may be directly mounted on the first motion mechanism 31 , or may be mounted on the first motion mechanism 31 via an intermediate structure (eg, the first mounting member 323 described below).

[0099] The first stopper 321 and the second stopper 322 may be arranged along the first direction X, or as shown in FIG. Figure 6 and 8 The coating die heads 100 shown in FIG. 1 are arranged along the width direction Z of the entire coating die head 100 and are disposed opposite to each other.

[0100] When the first limiting mechanism 32 moves to Figure 6 When the coating die 100 is in the locking position, the first limit member 321 and the second limit member 322 are respectively located on both sides of the first fastener 20 along the width direction Z of the coating die 100, thereby limiting the movement of the first die 11 along the width direction Z, and at the same time limiting the movement of the first die 11 along the first direction X, because the horizontal projection of the first direction X is consistent with the width direction Z of the first die 11.

[0101] The spacing between the first limiting member 321 and the second limiting member 322 can be the same as the radial dimension of the first fastener 20 or slightly larger than the radial dimension of the first fastener 20 (for example, the difference between the two is not greater than 2 mm), so that the first limiting mechanism 32 can be more conveniently detached from the first fastener 20 or inserted into the first fastener 20.

[0102] The above structure can use the first limit member 321 and the second limit member 322 to limit the opposite sides of the first fastener 20 respectively, so as to fix the position of the first die head 11 in the first direction X=. Not only is the structure simple, but also the first limit member 321 and the second limit member 322 can form a clamping space matching the first fastener 20, which is beneficial to the connection and disconnection of the first limit mechanism 32 and the first fastener 20.

[0103] In some examples, optionally, the first limiting mechanism 32 further includes a first mounting member 323 , the first mounting member 323 is connected to the first motion mechanism 31 , and the first limiting member 321 and the second limiting member 322 are connected to the first mounting member 323 .

[0104] The first mounting member 323 can be a mounting plate, a mounting block, a mounting strip or other structures, and its main function is to install the first limiting member 321 and the second limiting member 322 mentioned above, and to connect the first motion mechanism 31. The first mounting member 323 facilitates the connection between the first limiting member 321 and the second limiting member 322 and the first motion mechanism 31 respectively.

[0105] In some embodiments, the number of first limiting mechanisms 32 of this embodiment can be multiple, for example, two in the figure. At this time, the first limiting member 321 and the second limiting member 322 form two groups of first limiting mechanisms 32, and both groups of first limiting mechanisms 32 are installed on the first mounting member 323.

[0106] Correspondingly, the number of the first fasteners 20 corresponding to the first limiting mechanism 32 located on one side in the length direction of the coating die head 100 is also two, and the two first limiting mechanisms 32 can lock or unlock the two first fasteners 20 at the same time.

[0107] In some examples, optionally, the first motion mechanism 31 is a linear reciprocating motion mechanism.

[0108] The linear reciprocating motion mechanism refers to a movable structure in the first limiting mechanism 32 that can move in two opposite directions. For example, the first motion mechanism 31 drives the first limiting mechanism 32 to reciprocate along the length direction of the coating die head 100 .

[0109] There are various structural forms of the first motion mechanism 31 that can drive the first limiting mechanism 32 to perform linear reciprocating motion. For example, a structure that drives a crank slider mechanism, a connecting rod mechanism, an eccentric wheel mechanism, etc. to achieve reciprocating motion through a driving member such as a motor. It can also be a cylinder, an electric cylinder, a hydraulic cylinder and other structures. This embodiment does not list them one by one, as long as the structure can drive the first limiting mechanism 32 to perform linear reciprocating motion along the length direction in the figure, it can be used.

[0110] The first motion mechanism 31 is designed as a linear reciprocating motion mechanism, and the linear reciprocating motion of the first motion mechanism 31 drives the first limiting mechanism 32 to move to connect with or disconnect from the first fastener 20. Compared with other motion modes, the linear motion stroke is shorter, the action is faster, and it occupies less working space.

[0111] In some embodiments, the first motion mechanism 31 includes a first driving part 311 and a first linear motion part 312 . The first driving part 311 is connected to the first die head 11 . The first linear motion part 312 is connected to the first driving part 311 and is used to drive the first limiting mechanism 32 to move.

[0112] The first driving part 311 can be a cylinder structure of a pneumatic cylinder, a hydraulic cylinder or an electric cylinder, and the first linear motion part 312 can be a piston rod structure. The cylinder body drives the piston rod to perform linear motion through pneumatic, hydraulic or electric drive.

[0113] The first driving part 311 is used to drive the first linear motion part 312 to perform linear motion, thereby driving the first limiting mechanism 32 to move between the locking position and the unlocking position. The structure is simple and easy to implement.

[0114] In some examples, optionally, the first limiting assembly 30 further includes a first mounting frame 33 , the first mounting frame 33 is connected to the first die head 11 , and the first driving unit 311 is mounted on the first mounting frame 33 .

[0115] The main function of the first mounting frame 33 is to mount the first motion mechanism 31 of this embodiment. The shape of the first mounting frame 33 is not limited. For example, its cross-sectional shape may be a straight line, an L shape, a U shape, etc.

[0116] The first mounting frame 33 can be connected to the first die head 11 by mechanical connection methods such as welding, bonding, and bolt connection, and the first motion mechanism 31 can also be connected to the first mounting frame 33 by the above-mentioned mechanical connection methods, thereby realizing the assembly of the first motion mechanism 31 on the first die head 11.

[0117] Combined with the attachment again Figure 4 and 5 As shown, in some examples, optionally, the first adjustment gap 113 is a circumferential gap between the first fastener 20 and the first adjustment hole 111 .

[0118] The circumferential first adjustment gap 113 enables the first die head 11 to be adjusted in multiple directions, thus providing a better degree of adjustment freedom.

[0119] In order to restrict the first die head 11 and reduce unnecessary movement of the first die head 11 due to the existence of the first circumferential adjustment gap 113 , this embodiment is further improved.

[0120] In some examples, optionally, the coating device 1000 also includes a second fastener 50 and a second limiting assembly 60, the first die 11 is provided with a second adjustment hole 112, the second fastener 50 is passed through the second adjustment hole 112 and is connected to the second die 12, and a circumferential second adjustment gap 114 is provided between the second fastener 50 and the hole wall of the second adjustment hole 112, the second limiting assembly 60 is connected to the first die 11, and the second limiting assembly 60 is connected to the first die 11 in the second locking state to limit the movement of the first die 11 along the second direction Y, and is disconnected from the second fastener 50 in the second unlocking state to enable the first die 11 to move along the second direction Y, and the second direction Y intersects with the arrangement direction from the first die 11 to the second die 12, and intersects with the first direction X.

[0121] The second limiting assembly 60 can limit the movement of the first die head 11 relative to the second fastener 50 and the second die head 12 along the second direction Y. When it is necessary to adjust the position of the first die head 11 along the second direction Y, the restriction on the first die head 11 along the second direction Y is released through the action of the second limiting assembly 60, thereby improving the range and freedom of movement and adjustment of the first die head 11.

[0122] The second direction Y may also be a direction having two opposite sub-directions, or the second direction Y may have only one direction. In some embodiments, the second direction Y is the length direction of the coating die 100 .

[0123] The second fastener 50 has the same or similar structure as the aforementioned first fastener 20. In some embodiments, the first fastener 20 is located on both sides of the coating die 100 along the width direction Z, and when the number of first fasteners 20 on each side of the first die 11 along the second direction Y is multiple, the multiple first fasteners 20 located on the same side can be spaced apart along the width direction Z.

[0124] The second fastener 50 is located in the middle area of ​​the coating die 100 along the width direction Z, and when there are multiple second fasteners 50, the multiple second fasteners 50 can be arranged at intervals along the length direction or the second direction Y of the coating die 100.

[0125] In some embodiments, the structure of the second limiting assembly 60 is similar to or the same as the structure of the aforementioned first limiting assembly 30 .

[0126] In some examples, optionally, the second limiting assembly 60 includes a second moving mechanism 61 and a second limiting mechanism 62, the second moving mechanism 61 is connected to the first die head 11, and the second limiting mechanism 62 is connected to the second moving mechanism 61 and moves driven by the second moving mechanism 61. In the second locked state, the second limiting mechanism 62 is limitedly engaged with the second fastener 50 in the second direction Y, and in the second unlocked state, the second limiting mechanism 62 and the second fastener 50 are released from the limiting engagement.

[0127] The third moving mechanism 41 is used to drive the second limiting mechanism 62 to move along the width direction Z of the coating die 100. The second limiting mechanism 62 includes a second mounting member 621 and a third limiting member 622 and a fourth limiting member 623 installed on the second mounting member 621. After the third limiting member 622 and the fourth limiting member 623 are plugged into the second fastener 50, they can limit the movement of the first die 11 along the second direction Y.

[0128] The second limiting assembly 60 is different from the first limiting assembly 30 in that the movement direction and the limiting direction are different.

[0129] In some embodiments, the first limit member 321 and the second limit member 322 can be arranged at intervals along the width direction Z of the coating die 100 to form a clamping space for clamping the first fastener 20, and the third limit member 622 and the fourth limit member 623 can be arranged at intervals along the length direction of the coating die 100 to form a clamping space for clamping the second fastener 50.

[0130] And the length direction of the first mounting member 323 is arranged along the width direction Z of the coating die head 100 , and the length direction of the second mounting member 621 is arranged along the length direction of the coating die head 100 .

[0131] The second mounting member 621 may also be provided with a plurality of second limiting mechanisms 62 , and each second limiting mechanism 62 may correspondingly lock a second fastening member 50 .

[0132] In addition, the number of second limit assemblies 60 can also be multiple. Taking the two second limit assemblies 60 in the figure as an example, the two second limit assemblies 60 are arranged at intervals along the length direction of the coating die 100, one of the second limit assemblies 60 is used to cooperate with a part of the multiple second fasteners 50, and the other second limit assembly 60 is used to cooperate with the rest of the multiple second fasteners 50 to lock the first die 11 in the second direction Y.

[0133] When the locking of the first die head 11 along the second direction Y is released by the second limiting assembly 60 , the position of the first die head 11 along the length direction can be adjusted by a manual or mechanical adjustment device (not shown in the figure).

[0134] In addition, the second limiting assembly 60 may further include a second mounting frame 63 , the second mounting frame 63 is mounted on the first die head 11 by means of mechanical connection, and the third motion mechanism 41 is mounted on the second mounting frame 63 by means of mechanical connection.

[0135] In some examples, optionally, the second motion mechanism 61 is a linear reciprocating motion mechanism.

[0136] The second motion mechanism 61 has the same or similar structure as the aforementioned first motion mechanism 31 , except that the linear motion direction of the second motion mechanism 61 is perpendicular to that of the first motion mechanism 31 . The specific structure of the second motion mechanism 61 is not described in detail in this embodiment.

[0137] Combined with the attachment again Figure 1 and attached Figure 3 As shown, in some examples, optionally, the adjustment assembly 40 includes a third motion mechanism 41, which is installed on the second die 12 and connected to the first die 11, and the third motion mechanism 41 is used to drive the first die 11 to move along the first direction X.

[0138] The third motion mechanism 41 can be directly installed on the second die head 12 and connected to the first die head 11. The structure of the third motion mechanism 41 can be the same as or different from the aforementioned first motion mechanism 31, as long as it can drive the first die head 11 to move along the first direction X.

[0139] When the adjustment assembly 40 releases the lock on the position of the first die head 11 , the third motion mechanism 41 of this embodiment drives the first die head 11 to move along the first direction X, thereby adjusting the distance between the first die head 11 and the coating roller.

[0140] Compared with other motion modes, the linear reciprocating motion of the third motion mechanism 41 has a shorter stroke, a faster motion, and occupies less working space.

[0141] In some examples, optionally, the third motion mechanism 41 is a linear reciprocating motion mechanism.

[0142] The third motion mechanism 41 may include a second driving part 411, a transmission part 412 and a second linear motion part 413. The second driving part 411 is installed on the second die head 12. The second linear motion part 413 is connected to the second driving part 411 through the transmission part 412. The second linear motion part 413 is connected to the first die head 11 and is used to drive the first die head 11 to move.

[0143] The second driving part 411 may be a structure for outputting torque such as an electric motor, the transmission part 412 is a transmission structure for decelerating or changing the direction or mode of movement, and the second linear motion part 413 may include a piston rod.

[0144] In some embodiments, the transmission part 412 of this embodiment is a structure that converts rotational motion into linear motion. For example, the transmission part 412 may include a ball screw transmission structure, a crank-connecting rod transmission structure, a gear rack transmission structure, and a cam transmission structure.

[0145] The third motion mechanism 41 is designed to include a second driving part 411, a transmission part 412 and a second linear motion part 413. The transmission part 412 can transmit and convert the motion of the second driving part 411 into speed, thereby driving the second linear motion to move more stably.

[0146] Of course, the structure of the third motion mechanism 41 is not limited thereto. For example, the third motion mechanism 41 may also be a structure such as an electric cylinder, a hydraulic cylinder or a pneumatic cylinder.

[0147] In addition, the adjustment assembly 40 may further include a third mounting frame 42 , and the third motion mechanism 41 mentioned above and the displacement measuring member 70 described below may be mounted on the third mounting frame 42 .

[0148] In some examples, optionally, the coating device 1000 further includes a displacement measuring device 70, and the displacement measuring device 70 is used to measure and display the displacement of the third motion mechanism 41 in linear motion.

[0149] The displacement measuring member 70 may include a micrometer, or may include a displacement sensor for detecting the distance of a certain point of the second linear motion portion 413 .

[0150] The micrometer can be mounted on the third mounting bracket 42, and the measuring rod of the micrometer is adjusted so that its axis is perpendicular to the measuring surface of the second linear motion part 413. During measurement, the stroke of the piston rod is determined according to the reading of the micrometer.

[0151] Combined with Fig.10 As shown, in some examples, optionally, the coating device 1000 further includes a supply structure 200 and a conveying structure 300, wherein the supply structure 200 is used to provide the coating slurry to the coating die 100, and the conveying structure 300 is used to provide the substrate to be coated to the coating die 100.

[0152] The feeding structure 200 is used to provide a substrate to the coating die 100. The feeding structure 200 may include structures such as a conveying roller and an extrusion roller. The feeding structure 200 can be connected to the aforementioned first feeding pipe 18 and the second feeding pipe 19, and is used to provide coating slurry to the first feeding pipe 18 and the second feeding pipe 19. Since the improvement of the coating device 1000 of this embodiment mainly lies in the coating die 100, the above-mentioned feeding structure 200, conveying structure 300, etc. are not described in detail and illustrated.

[0153] Finally, please see the attached Figure 1-10As shown, the embodiment of the present application provides a coating device 1000, including a coating die 100, the coating die 100 includes a die assembly 10, a first fastener 20, a first limit assembly 30 and an adjustment assembly 40, the die assembly 10 includes a first die 11 and a second die 12, the first die 11 is installed on the second die 12, and is provided with a first adjustment hole 111; the first fastener 20 is passed through the first adjustment hole 111 and connected to the second die 12, and a first adjustment hole 111 is provided between the first fastener 20 and the hole wall of the first adjustment hole 111 along a first direction X The gap 113, the first direction X intersects the arrangement direction of the first die head 11 to the second die head 12; the first limit assembly 30 is connected to the first die head 11, the first limit assembly 30 is connected to the first fastener 20 in the first locking state to limit the movement of the first die head 11 along the first direction X, and is disconnected from the first fastener 20 in the first unlocking state so that the first die head 11 can move along the first direction X; the adjustment assembly 40 is installed on the second die head 12 and connected to the first die head 11, and the adjustment assembly 40 is used to drive the first die head 11 to move along the first direction X. The first limit assembly 30 includes a first motion mechanism 31 and a first limit mechanism 32, the first motion mechanism 31 is connected to the first die head 11, the first limit mechanism 32 is connected to the first motion mechanism 31, and moves under the drive of the first motion mechanism 31, in the first locking state, the first limit mechanism 32 cooperates with the first fastener 20 to limit the first direction X, and in the first unlocking state, the first limit mechanism 32 and the first fastener 20 are released from the limit cooperation. The first limiting mechanism 32 includes a first limiting member 321 and a second limiting member 322, wherein the first limiting member 321 is used to abut against one of the opposite sides of the first fastener 20, and the second limiting member 322 is used to abut against the other side of the first fastener 20. The first limiting mechanism 32 also includes a first mounting member 323, wherein the first mounting member 323 is connected to the first motion mechanism 31, and the first limiting member 321 and the second limiting member 322 are connected to the first mounting member 323. The first motion mechanism 31 is a linear reciprocating motion mechanism. The first limiting assembly 30 also includes a first mounting frame 33, wherein the first mounting frame 33 is connected to the first die head 11, and the first motion mechanism 31 is mounted on the first mounting frame 33. The first adjustment gap is the circumferential gap between the first fastener 20 and the first adjustment hole 111.The coating device 1000 also includes a second fastener 50 and a second limiting assembly 60. The first die head 11 is provided with a second adjustment hole 112. The second fastener 50 is passed through the second adjustment hole 112 and is connected to the second die head 12. A circumferential second adjustment gap 114 is provided between the second fastener 50 and the hole wall of the second adjustment hole 112. The second limiting assembly 60 is connected to the first die head 11. The second limiting assembly 60 is connected to the second fastener 50 in the second locking state to limit the movement of the first die head 11 along the second direction Y, and is disconnected from the second fastener 50 in the second unlocking state to enable the first die head 11 to move along the second direction Y. The second direction Y intersects with the arrangement direction from the first die head 11 to the second die head 12, and intersects with the first direction X. The second limiting assembly 60 includes a second motion mechanism 61 and a second limiting mechanism 62. The second motion mechanism 61 is connected to the first die head 11. The second limiting mechanism 62 is connected to the second motion mechanism 61 and moves under the drive of the second motion mechanism 61. In the second locked state, the second limiting mechanism 62 cooperates with the second fastener 50 in the second direction Y. In the second unlocked state, the second limiting mechanism 62 releases the limiting cooperation with the second fastener 50. The second motion mechanism 61 is a linear reciprocating motion mechanism. The adjustment assembly 40 includes a third motion mechanism 41. The third motion mechanism 41 is installed on the second die head 12 and connected to the first die head 11. The third motion mechanism 41 is used to drive the first die head 11 to move along the first direction X. The third motion mechanism 41 is a linear reciprocating motion mechanism. The coating device 1000 also includes a displacement measuring member 70, which is used to measure the displacement of the third motion mechanism 41 in linear motion and display it. The coating device 1000 further includes a supply structure 200 and a conveying structure 300 . The supply structure 200 is used to provide coating slurry to the coating die 100 , and the conveying structure 300 is used to provide a substrate to be coated to the coating die 100 .

[0154] In the second aspect, the embodiment of the present application provides a battery production system, including the coating device 1000 as described in the above technical solution, and the battery production system of this embodiment may also include a drying device and a pressing device (not shown in the figure). The drying device is used to dry the coated substrate, and the pressing device is used to press the dried substrate to form a pole piece structure.

[0155] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0156] 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 it. 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 make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A coating device, comprising a coating die head, characterized in that: The coating die comprises: A die assembly, comprising a first die and a second die, wherein the first die is mounted on the second die and is provided with a first adjustment hole; A first fastener is inserted into the first adjustment hole and connected to the second die head, wherein a first adjustment gap is provided between the first fastener and the hole wall of the first adjustment hole along a first direction, and the first direction intersects with an arrangement direction from the first die head to the second die head; a first limiting assembly connected to the first die head, the first limiting assembly being connected to the first fastener in a first locked state to limit the movement of the first die head along the first direction, and being disconnected from the first fastener in a first unlocked state to enable the first die head to move along the first direction; and An adjusting component is installed on the second die head and connected to the first die head, and the adjusting component is used for driving the first die head to move along the first direction.

2. The coating device according to claim 1, characterized in that: The first limiting assembly includes a first motion mechanism and a first limiting mechanism, the first motion mechanism is connected to the first die head, the first limiting mechanism is connected to the first motion mechanism and moves driven by the first motion mechanism, in the first locking state, the first limiting mechanism cooperates with the first fastener in the first direction for limiting positioning, and in the first unlocking state, the first limiting mechanism releases the limiting cooperation with the first fastener.

3. The coating device according to claim 2, characterized in that: The first limiting mechanism includes a first limiting member and a second limiting member, wherein the first limiting member is used to abut against one of the opposite sides of the first fastener, and the second limiting member is used to abut against the other side of the first fastener.

4. The coating device according to claim 3, characterized in that: The first limiting mechanism further includes a first mounting member, the first mounting member is connected to the first movement mechanism, and the first limiting member and the second limiting member are connected to the first mounting member.

5. The coating device according to claim 2, characterized in that: The first motion mechanism is a linear reciprocating motion mechanism.

6. The coating device according to claim 2, characterized in that: The first limiting assembly also includes a first mounting frame, the first mounting frame is connected to the first die head, and the first motion mechanism is installed on the first mounting frame.

7. The coating device according to any one of claims 1 to 6, characterized in that: The first adjustment gap is a circumferential gap between the first fastener and the first adjustment hole.

8. The coating device according to claim 7, characterized in that: The coating device also includes a second fastener and a second limiting assembly, the first die head is provided with a second adjustment hole, the second fastener is passed through the second adjustment hole and is connected to the second die head, a circumferential second adjustment gap is provided between the second fastener and the hole wall of the second adjustment hole, the second limiting assembly is connected to the first die head, the second limiting assembly is connected to the second fastener in a second locked state to limit the movement of the first die head along a second direction, and is disconnected from the second fastener in a second unlocked state to enable the first die head to move along the second direction, the second direction intersects with the arrangement direction from the first die head to the second die head, and intersects with the first direction.

9. The coating device according to claim 8, characterized in that: The second limiting assembly includes a second motion mechanism and a second limiting mechanism, the second motion mechanism is connected to the first die head, the second limiting mechanism is connected to the second motion mechanism, and moves driven by the second motion mechanism, in the second locking state, the second limiting mechanism and the second fastener are limited in the second direction, and in the second unlocking state, the second limiting mechanism and the second fastener are released from the limiting cooperation.

10. The coating device according to claim 9, characterized in that: The second motion mechanism is a linear reciprocating motion mechanism.

11. The coating device according to any one of claims 1 to 6, characterized in that: The adjustment assembly includes a third motion mechanism, which is installed on the second die head and connected to the first die head. The third motion mechanism is used to drive the first die head to move along the first direction.

12. The coating device according to claim 11, characterized in that: The third motion mechanism is a linear reciprocating motion mechanism.

13. The coating device according to claim 12, characterized in that: The coating device further comprises a displacement measuring device, and the displacement measuring device is used to measure and display the displacement of the third motion mechanism in linear motion.

14. The coating device according to any one of claims 1 to 6, characterized in that: The coating device further comprises a feeding structure and a conveying structure, wherein the feeding structure is used to provide coating slurry to the coating die head, and the conveying structure is used to provide the substrate to be coated to the coating die head.

15. A battery production system, characterized in that: Comprising a coating device as described in any one of claims 1-14.

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