Pole piece coating device

Abstract

The utility model discloses a pole piece coating device. The pole piece coating device comprises a first lifting mechanism and a die holder, the movable end of the first lifting mechanism can do reciprocating rectilinear motion in the first direction. The die holder comprises a first part and a second part, a material groove is formed in the second part, and the first part is arranged on the outer surface of the second part in a sleeving mode. The movable end of the first lifting mechanism can do reciprocating rectilinear motion, so that the size of the first discharge port a in the first direction C1 is adjusted, or the size of the second discharge port b in the first direction C1 is adjusted, the thickness, the flow velocity, the flow rate and other parameters of a slurry coating are adjusted, and adjustment is convenient and simple; and a series of tedious operations such as related design and replacement of the gasket related to different standards of coating slurry are avoided, and meanwhile, the cost of the coating device is reduced.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery pole piece manufacturing equipment, in particular to a pole piece coating device. Background Art

[0002] In the production of battery pole pieces, it is necessary to coat a slurry on the pole piece substrate, and the slurry forms a slurry coating on the surface of the pole piece to improve the performance of the pole piece.

[0003] The coating device includes a coating die head, and the coating die head is provided with a slurry outlet. According to different performance requirements of the pole piece, by precisely controlling the slurry outlet, parameters such as the thickness, flow rate, and flow volume of the slurry coating can be adjusted, so as to coat the required slurry coating on the surface of the pole piece.

[0004] In the related art, a gasket is placed to control parameters such as the thickness, flow rate, and flow volume of the slurry coating. In the above method, the debugging process takes a long time and is complex; at the same time, the installation of the gasket mainly relies on human experience and feel, and the feel of a person has too much instability, often resulting in non-parallel installation of the gasket, affecting the parameter accuracy of the slurry coating. In addition, gaskets with different thicknesses need to be set, resulting in an increase in the cost of the coating device. Summary of the Utility Model

[0005] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a pole piece coating device, which can adjust parameters such as the thickness, flow rate, and flow volume of the slurry coating, and the adjustment is convenient and simple; a series of cumbersome operations related to gasket design, replacement, etc. due to different slurry coating standards are avoided, and at the same time, it helps to reduce the cost of the coating device.

[0006] A pole piece coating device according to an embodiment of the utility model includes: a first lifting mechanism and a die base.

[0007] The movable end of the first lifting mechanism can perform a reciprocating linear motion along a first direction;

[0008] The die base includes a first part and a second part. A material groove is provided on the second part, and the first part is arranged around the material groove and sleeved on the outer surface of the second part.

[0009] A first discharge port is provided on the first part, and a slurry overflow part is provided on the material groove. The slurry overflow part can be partially located in the first discharge port in the first direction. One of the first part and the second part is connected to the movable end of the first lifting mechanism, and the movable end of the first lifting mechanism moves to adjust the size of the first discharge port in the first direction; or,

[0010] The second part is provided with a second discharge port, which is communicatively connected to the material tank. One of the first part and the second part is connected to the movable end of the first elevator, and the movable end of the first lifting mechanism moves to adjust the size of the second discharge port in the first direction.

[0011] In this embodiment, the movable end of the first lifting mechanism can perform a reciprocating linear motion to realize the adjustment of the size of the first discharge port a in the first direction C1, or realize the adjustment of the size of the second discharge port b in the first direction C1, thereby adjusting parameters such as the thickness, flow rate, and flow of the slurry coating. The adjustment is convenient and simple; it avoids a series of cumbersome operations such as the design and replacement of gaskets related to different slurry coating standards. At the same time, it helps to reduce the cost of the coating device.

[0012] According to some embodiments of the present invention, the first part is provided with the first discharge port.

[0013] The second part is further provided with at least two guiding holes, which are arranged around the material tank. The first lifting mechanisms correspond to the guiding holes one by one. The movable end of the first lifting mechanism passes through the guiding holes and is connected to the first part, and the first lifting mechanism drives the first part to move to realize the adjustment of the size of the first discharge port in the first direction.

[0014] According to some embodiments of the present invention, the first discharge port includes a notch provided on the annular first part, and the notch makes the first part have a first end and a second end arranged at intervals. The distance between the first end and the second end in the second direction is the size of the first discharge port in the second direction, and the second direction is perpendicular to the first direction.

[0015] According to some embodiments of the present invention, the polar plate coating device further includes a second lifting mechanism, and the movable end of the second lifting mechanism can perform a reciprocating linear motion in the first direction;

[0016] The mold base further includes a third part, and the movable end of the second lifting mechanism is connected to the third part, so that the third part is in contact with the first end or the second end to adjust the size of the first discharge port in the second direction.

[0017] According to some embodiments of the present invention, there are multiple third parts, and the third parts correspond to the second lifting mechanisms one by one.

[0018] A part of the plurality of the third parts is disposed at the first end portion, and any two adjacent third parts in the part are in contact with each other; the remaining parts of the plurality of the third parts are disposed at the second end portion, and any two adjacent third parts in the remaining parts are in contact with each other.

[0019] According to some embodiments of the present invention, the third part includes a first surface and a second surface which are oppositely arranged, the second surface is in contact with the first end portion or the second end portion, and the second surface includes a second curved surface;

[0020] The first surface is in contact with the slurry flowing out from the first discharge port, and the first surface includes a first curved surface.

[0021] According to some embodiments of the present invention, the distance between the first surface at the first end portion and the first surface at the second end portion gradually decreases along the slurry flow direction.

[0022] According to some embodiments of the present invention, the third part further includes a third surface connecting the first surface and the second surface, the third surface is in contact with the external environment, a first corner is formed at the connection between the third surface and the first surface or the second surface, and an insertion notch is provided at the first corner.

[0023] According to some embodiments of the present invention, the mold base further includes an insertion block, and the insertion block is in insertion fit with the insertion notch.

[0024] According to some embodiments of the present invention, the first lifting mechanism or the second lifting mechanism includes a lead screw lifting mechanism, a hydraulic lifting mechanism, and a pneumatic lifting mechanism.

[0025] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0027] Figure 1 is a schematic diagram of a pole piece coating device according to an embodiment of the present invention;

[0028] Figure 2 is Figure 1 a cross-sectional view taken along the A-A direction of

[0029] Figure 3 is an exploded schematic diagram of a pole piece coating device according to an embodiment of the present invention;

[0030] Figure 4 is a partial schematic view of a pole piece coating device according to an embodiment of the present utility model;

[0031] Figure 5 is Figure 4 a top view of

[0032] Figure 6 is Figure 5 an enlarged schematic view of part B of

[0033] Figure 7 is Figure 5 an enlarged schematic view of part C of

[0034] Figure 8 is a schematic view of another die holder according to an embodiment of the present utility model;

[0035] Figure 9 is an exploded schematic view of another die holder according to an embodiment of the present utility model;

[0036] Reference numerals:

[0037] die head 10, die holder 20, notch 201, material groove 202, slurry overflow part 2021, through hole 203, first part 21, first end 211, second end 212;

[0038] second part 22, inlet 221, outlet 222, partition 223, guide hole 224;

[0039] third part 23, first surface 231, second surface 232, third surface 233, fourth surface 234, insertion notch 2301, first unit 230a, second unit 230b, third right part 23a, third middle part 23b, third left part 23c;

[0040] first lifting mechanism 30, movable end 31 of the first lifting mechanism;

[0041] second lifting mechanism 40, movable end 41 of the second lifting mechanism;

[0042] chamfer adjustment block 50, first chamfer 51, second chamfer 52, third chamfer 53, fourth chamfer 54;

[0043] first seal 61, second seal 62, first discharge port a, second discharge port b. Detailed implementation manners

[0044] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0045] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the applicability of other processes and / or the use of other materials.

[0046] In the production of battery electrodes, it is necessary to coat a slurry on the electrode substrate, and the slurry forms a slurry coating on the surface of the electrode to improve the performance of the electrode.

[0047] The coating device includes a coating die head, and the coating die head is provided with a slurry outlet. According to different performance requirements of the electrode, by precisely controlling the slurry outlet, parameters such as the thickness, flow rate, and flow of the slurry coating can be adjusted, so as to coat the required slurry coating on the surface of the electrode.

[0048] In the related art, a gasket placement method is used to control parameters such as the thickness, flow rate, and flow of the slurry coating. In the above method, the debugging process takes a long time and is complex; at the same time, the installation of the gasket mainly depends on human experience and feel during the installation process, and the feel of a person has too much instability, and the gasket is often installed unevenly, affecting the parameter accuracy of the slurry coating. In addition, gaskets of different thicknesses need to be set, resulting in an increase in the cost of the coating device.

[0049] Based on this, this embodiment proposes a pole piece coating device, as Figures 1-9 shown, including: a first lifting mechanism 30 and a die holder 20. As Figure 3 shown, the movable end 31 of the first lifting mechanism 30 can perform a reciprocating linear motion along the first direction C1. The die holder 20 includes a first part 21 and a second part 22. A material tank 202 is provided on the second part 22, and the first part 21 is disposed around the material tank 202 and sleeved on the outer surface of the second part 22.

[0050] A first discharge port a is provided on the first part 21, and a slurry overflow part 2021 is provided on the material tank 202. The slurry overflow part 2021 can be partially located at the first discharge port a in the first direction C1. One of the first part 21 and the second part 22 is connected to the movable end 31 of the first lifting mechanism 30, and the movable end 31 of the first lifting mechanism 30 moves to adjust the size of the first discharge port a in the first direction C1. Or,

[0051] A second discharge port b is provided on the second part 22, and the second discharge port b is communicated with the material tank 202. One of the first part 21 and the second part 22 is connected to the movable end 31 of the first lifting mechanism 30, and the movable end 31 of the first lifting mechanism 30 moves to adjust the size of the second discharge port b in the first direction C1.

[0052] It should be noted that: The first lifting mechanism 30 can be a screw lifting mechanism. For example, the ball screw lifting mechanism has point-contact rolling motion, with small frictional resistance, high sensitivity, no tremor during startup, and no crawling phenomenon at low speeds during operation. Therefore, it can precisely control micro-feeding. The first lifting mechanism 30 can be a hydraulic lifting mechanism. The hydraulic lifting mechanism runs smoothly, can precisely control micro-feeding, and is convenient for quick startup, braking, and frequent commutation. The first lifting mechanism 30 can be a pneumatic lifting mechanism. The pneumatic lifting mechanism runs smoothly, can precisely control micro-feeding, and is convenient for quick startup, braking, and frequent commutation.

[0053] As Figures 1-3 shown, in the first embodiment, the movable end 31 of the first lifting mechanism 30 can make a reciprocating linear motion along the first direction C1.

[0054] As Figure 3 shown, the die holder 20 includes a first part 21 and a second part 22. Among them, the first part 21 can be connected to the movable end 31 of the first lifting mechanism 30, and the first lifting mechanism 30 drives the first part 21 to move to realize the adjustment of the size of the first discharge port a in the first direction C1.

[0055] The first part 21 is an annular part with a notch 201, and the notch 201 serves as the first discharge port a. The notch 201 makes the first part 21 have a first end 211 and a second end 212 arranged at intervals. Of course, it can be understood that in addition to the notch 201 serving as the first discharge port a, a through hole can also serve as the first discharge port a. For example, the first part 21 is an annular part with a through hole, and the through hole penetrates the inner wall and the outer wall of the first part 21.

[0056] A material tank 202 is provided on the second part 22. Among them, the die head 10 covers the opening of the material tank 202 so that the material tank 202 is a closed space.

[0057] The first part 21 is arranged around the material trough 202 and sleeved on the outer surface of the second part 22. As Figure 3 shown, since the notch 201 on the first part 21 is adapted to the shape of the slurry overflow part 2021 of the material trough 202, and the slurry overflow part 2021 can be partially located in the notch 201 in the first direction C1.

[0058] When the movable end 31 of the first lifting mechanism 30 moves, driving the first part 21 to reciprocate in the first direction C1, the first part 21 moves relative to the second part 22, so that the slurry overflow part 2021 can completely or partially block the notch 201 in the first direction C1. When partially blocked, a slit is formed between the notch 201 and the slurry overflow part 2021 in the first direction C1, as Figure 1 indicated by the position pointed by the serial number a in. In the first direction C1, the size of the slit can be changed, that is, the thickness dimension of the slit can be changed, so as to realize the size adjustment of the first discharge port a in the first direction C1, and further accurately control the slurry outlet, and accurately adjust parameters such as the thickness, flow rate, and flow of the coating slurry.

[0059] Of course, it can be understood that in this embodiment, the movable end 31 of the first lifting mechanism 30 can also be connected to the second part 22.

[0060] As Figure 8 and Figure 9 shown, in the second embodiment, the movable end 31 of the first lifting mechanism 30 can reciprocate linearly in the first direction C1.

[0061] The die base 20 includes a first part 21 and a second part 22. Among them, the first part 21 can be connected to the movable end 31 of the first lifting mechanism 30, and the first lifting mechanism 30 drives the first part 21 to move to realize the size adjustment of the first discharge port a in the first direction C1.

[0062] The die base 20 includes a first part 21 and a second part 22. The difference from the first embodiment is that the first part 21 is in a closed ring shape and no notch 201 (the first discharge port a) is opened. Instead, a discharge port is opened on the second part 22, that is, a material trough 202 and a second discharge port b are provided on the second part 22. The die head 10 covers the opening of the material trough 202 to make the material trough 202 a closed space. Among them, the second discharge port b includes a through hole 203 on the outer side wall of the second part 22, and the through hole 203 is communicated with the material trough 202. Of course, it can be understood that the second discharge port b also includes a notch on the outer side wall of the second part 22, and the notch is communicated with the material trough 202.

[0063] The annular inner wall of the first part 21 is adapted to the outer peripheral wall of the second part 22, so that the annular first part 21 is sleeved on the outer side wall of the second part 22. When the movable end 31 of the first lifting mechanism 30 moves, driving the first part 21 to reciprocate in the first direction C1, the first part 21 moves relative to the second part 22, and the annular inner wall of the first part 21 can partially or completely block the through hole 203. When partially blocked, a slit is formed between the annular inner wall of the first part 21 and the through hole 203 in the first direction C1, as shown in Figure 8 the position indicated by the serial number b in. In the first direction C1, the size of the slit can be changed, that is, the thickness dimension of the slit can be changed. In this way, the size of the second discharge port b in the first direction C1 can be adjusted, and then the slurry outlet can be accurately controlled, and the parameters such as the thickness, flow rate, and flow of the coating slurry can be accurately adjusted.

[0064] The following embodiments are exemplified by the first embodiment:

[0065] According to some embodiments of the present invention, the lead screw lifting mechanism is provided with a scale for adjusting the movement stroke of the first part 21; the hydraulic lifting mechanism or the pneumatic lifting mechanism is provided with a pressure sensor for adjusting the movement stroke of the first part 21. Such a setting can quantify the movement of the first part 21, further improve the parameter accuracy of adjusting the slurry coating; reduce the operation links and adjustment difficulty, and improve the production efficiency and coating quality.

[0066] According to some embodiments of the present invention, referring to Figure 3 as shown, at least two guide holes 224 are further provided on the second part 22. The guide holes 224 are arranged around the material tank 202, and the first lifting mechanism 30 corresponds to the guide holes 224 one by one. The movable end 31 of the first lifting mechanism 30 passes through the guide hole 224 and is connected to the first part 21, so that the first lifting mechanism 30 drives the first part 21 to move, so as to realize the size adjustment of the first discharge port a in the first direction C1.

[0067] In a specific embodiment, as shown in Figure 3 as shown, a plurality of guide holes 224 are provided on the second part 22, and the plurality of guide holes 224 are arranged around the material tank 202. The first lifting mechanism 30 corresponds to the guide holes 224 one by one, and the movable end 31 of the first lifting mechanism 30 passes through the guide hole 224 and is connected to the first part 21. The movable ends 31 of each first lifting mechanism 30 rise or fall synchronously, so that the slit formed by the notch 201 and the slurry overflow part 2021 has the same thickness dimension in the second direction C2, that is, the thickness of each position of the slit in the second direction C2 is equal, which helps to ensure the consistency of the thickness (the dimension in the second direction) of the first discharge port a and realize the accurate control of the slurry outlet.

[0068] According to some embodiments of the present utility model, the pole piece coating device further includes a second lifting mechanism 40, and the movable end 41 of the second lifting mechanism 40 can perform reciprocating linear motion.

[0069] The die base 20 further includes a third part 23, the third part 23 is disposed at the first end 211 or the second end 212, and the third part 23 is in contact with the first end 211 or the second end 212. The movable end 41 of the second lifting mechanism 40 is connected to the third part 23, so that the third part 23 adjusts the size of the first discharge port a in the second direction C2.

[0070] It should be noted that the movable end 41 of the second lifting mechanism 40 can perform reciprocating linear motion along the second direction C2, or perform reciprocating linear motion along the first direction C1. By the reciprocating linear motion of the movable end 41 of the second lifting mechanism 40, the size adjustment of the first discharge port a in the second direction C2 is realized.

[0071] In a specific embodiment, as Figure 3 shown, the die base 20 includes a first part 21, a second part 22 and a third part 23. A notch 201 is formed on the first part 21, and the notch 201 makes the first part 21 have a first end 211 and a second end 212 which are spaced apart.

[0072] The second lifting mechanism 40 is connected to the first part 21, and the movable end 41 of the second lifting mechanism 40 performs reciprocating linear motion along the first direction C1. The movable end 41 of the second lifting mechanism 40 is connected to the third part 23, so that the third part 23 is in contact with the first end 211 or the second end 212.

[0073] As Figures 4-7 shown, the third part 23 includes a first surface 231 and a second surface 232 which are oppositely arranged in the second direction C2, the second surface 232 is in contact with the first end 211 or the second end 212, and the second surface 232 includes a second curved surface. The setting of the second curved surface, on the one hand, increases the contact area between the third part 23 and the first end 211 or the second end 212, which helps to inhibit the slurry in the material tank 202 from flowing out between the third part 23 and the first end 211 or the second end 212; on the other hand, the curved second surface increases the difficulty of the slurry in the material tank 202 flowing out between the third part 23 and the first end 211 or the second end 212.

[0074] The first surface 231 is in contact with the slurry flowing out of the first discharge port a, and the first surface 231 includes a first curved surface. The first curved surface reduces the resistance to the slurry flowing out of the first discharge port a, so that the flow rates of the slurry near the edge of the first discharge port a and the slurry located in the middle of the first discharge port a are approximately equal, which helps to improve the thick edge problem of the slurry coating.

[0075] Optionally, as Figure 6 shown, the third part 23 further includes a relatively arranged third surface 233 and a fourth surface 234, and the first surface 231, the third surface 233, the second surface 232, and the fourth surface 234 are connected end to end in sequence. Among them, the fourth surface 234 contacts the material tank 202, and the third surface 233 contacts the external environment.

[0076] A first corner is formed at the connection between the third surface 233 and the first surface 231, and an insertion notch 2301 is provided at the first corner. Of course, it can be understood that in some embodiments, the first corner is formed at the connection between the first surface 231 and the second surface 232.

[0077] In addition, the mold base 20 further includes an insertion block, and the insertion block is inserted and matched with the insertion notch 2301. The insertion block can be set as a chamfer adjustment block 50 or a seal.

[0078] In a specific embodiment, as Figure 6 and Figure 7 shown, the insertion block is set as the chamfer adjustment block 50. The chamfer adjustment block 50 is generally rectangular, and a first chamfer 51, a second chamfer 52, a third chamfer 53, and a fourth chamfer 54 are respectively provided at its four corners.

[0079] The chamfer adjustment block 50 is inserted and matched with the insertion notch 2301, so that the first chamfer 51 of the chamfer adjustment block 50 can connect the extension line of the first surface 231 and the extension line of the third surface 233; or, the second chamfer 52 can connect the extension line of the first surface 231 and the extension line of the third surface 233; or, the third chamfer 53 can connect the extension line of the first surface 231 and the extension line of the third surface 233; or, the fourth chamfer 54 can connect the extension line of the first surface 231 and the extension line of the third surface 233.

[0080] With such a setting, according to different slurries or different parameters of the slurry coating, a suitable chamfer can be selected to make the flow rates of the slurry near the edge of the first discharge port a and the slurry in the middle of the first discharge port a approximately equal, further improving the problem of thick edges of the slurry coating.

[0081] In a specific embodiment, as Figure 6 and Figure 7 shown, the insertion block is set as a seal, and the seal includes a first seal 61, a second seal 62, and a third seal 63.

[0082] At the first end portion 211, a first unit 230a is provided. The first unit 230a includes a plurality of third parts 23, and any two adjacent third parts 23 among the plurality of third parts 23 are in contact with each other. The outermost third part 23 in the first unit 230a is in contact with the first end portion 211. Among them, each third part 23 is matched with a second lifting mechanism 40.

[0083] At the second end portion 212, a second unit 230b is provided. The second unit 230b includes a plurality of third parts 23, and any two adjacent third parts 23 among the plurality of third parts 23 are in contact with each other. The outermost third part 23 in the second unit 230b is in contact with the second end portion 212. Among them, each third part 23 is matched with a second lifting mechanism 40.

[0084] As Figure 6 shown, the first unit 230a includes 3 third parts: a third right part 23a, a third middle part 23b, and a third left part 23c. The insertion notch 2301 on the third right part 23a is in insertion fit with the chamfer adjustment block 50.

[0085] The insertion notch 2301 on the third middle part 23b is in insertion fit with the first seal 61, and the first seal 61 fills the gap between the third middle part 23b and the third right part 23a. The insertion notch 2301 on the third left part 23c is in insertion fit with the second seal 62, and the second seal 62 fills the gap between the third left part 23c and the third middle part 23b.

[0086] In addition, an insertion part is also provided on the first end portion 211. The insertion part is in insertion fit with the third seal 63, and the third seal 63 fills the gap between the third right part 23a and the first end portion 211.

[0087] The second unit 230b is the same as the first unit 230a. The structure of the second unit 230b is described with reference to the first unit 230a, so it will not be elaborated here.

[0088] Of course, it can be understood that the number of the third parts 23 in the second unit 230b may be different from the number of the third parts 23 in the first unit 230a.

[0089] In addition, the distance between the first surfaces 231 at the first end portion 211 and the first surfaces 231 at the second end portion 212 gradually decreases along the slurry flow direction.

[0090] Specifically, as Figure 5 and Figure 6As shown, the distance d between the first surface 231 of the third left part 23c in the second unit 230b and the first surface 231 of the third right part 23a in the first unit 230a gradually decreases along the slurry flow direction. This setting makes the flow rates of the slurry near the edge of the first discharge port a and the slurry in the middle of the first discharge port a approximately equal, which helps to improve the problem of thick edges in the slurry coating.

[0091] According to some embodiments of the present invention, as Figure 2 and Figure 5 shown, a material tank 202 is provided on the second part 22. A partition 223 is provided in the material tank 202, and the partition 223 divides the material tank 202 into a front material chamber and a rear material chamber. An outlet 222 is provided at the bottom of the rear material chamber, and an inlet 221 communicating with the outlet 222 is provided on the outer surface of the second part 22. The coating enters the rear material chamber of the material tank 202 through the inlet 221 and the outlet 222, then enters the front material chamber of the material tank 202, and finally flows out from the first discharge port a. This setting helps the slurry to flow out evenly and improves the problem of inconsistent areal density in the transverse and longitudinal directions of the slurry coating.

[0092] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0093] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features.

[0094] In the description of the present invention, the meaning of "a plurality" is two or more.

[0095] In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0096] In the description of the present invention, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal width of the first feature is higher than that of the second feature.

[0097] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0098] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A pole piece coating device, characterized in that: include: A first lifting mechanism (30), wherein a movable end (31) of the first lifting mechanism is capable of reciprocating linear motion along a first direction; A mold base (20), the mold base (20) comprising a first part (21) and a second part (22), the second part (22) being provided with a material trough (202), the first part (21) being arranged around the material trough (202) and being sleeved on the outer surface of the second part (22), The first part (21) is provided with a first discharge port (a), the material trough (202) is provided with a slurry overflow portion (2021), the slurry overflow portion (2021) can be partially located at the first discharge port (a) in the first direction, one of the first part (21) and the second part (22) is connected to the movable end (31) of the first lifting mechanism, and the movable end (31) of the first lifting mechanism moves to adjust the size of the first discharge port (a) in the first direction; or, The second part (22) is provided with a second discharge port (b), and the second discharge port (b) is connected to the material trough (202). One of the first part (21) and the second part (22) is connected to the movable end (31) of the first lifting mechanism, and the movable end (31) of the first lifting mechanism moves to adjust the size of the second discharge port (b) in the first direction.

2. The electrode coating device according to claim 1, characterized in that: The first portion (21) is provided with the first discharge port (a), The second part (22) is also provided with at least two guide holes (224), and the guide holes (224) are arranged around the material trough (202). The first lifting mechanism (30) corresponds to the guide holes (224) one by one. The movable end (31) of the first lifting mechanism passes through the guide hole (224) and is connected to the first part (21). The first lifting mechanism (30) drives the first part (21) to move so as to realize the size adjustment of the first discharge port (a) in the first direction.

3. The electrode coating device according to claim 1, characterized in that: The first discharge port (a) comprises a notch (201) arranged on the first annular portion (21), the notch (201) enabling the first portion (21) to have a first end (211) and a second end (212) spaced apart from each other, the distance between the first end (211) and the second end (212) in a second direction being the dimension of the first discharge port (a) in the second direction, and the second direction being perpendicular to the first direction.

4. The pole piece coating device according to claim 3, characterized in that: The electrode coating device further comprises a second lifting mechanism (40), wherein a movable end (41) of the second lifting mechanism is capable of reciprocating linear motion in the first direction; The mold base (20) also includes a third part (23), and the movable end (41) of the second lifting mechanism is connected to the third part (23), so that the third part (23) fits with the first end (211) or the second end (212) to adjust the size of the first discharge port (a) in the second direction.

5. The pole piece coating device according to claim 4, characterized in that: The third part (23) includes a plurality of parts, and the third parts (23) correspond to the second lifting mechanisms (40) one by one. A portion of the plurality of third portions (23) is arranged at the first end portion (211), and any two adjacent third portions (23) in the portion are in contact with each other; the remaining portion of the plurality of third portions (23) is arranged at the second end portion (212), and any two adjacent third portions (23) in the remaining portion are in contact with each other.

6. The pole piece coating device according to claim 4, characterized in that: The third portion (23) comprises a first surface (231) and a second surface (232) which are arranged opposite to each other in the second direction, the second surface (232) is in contact with the first end (211) or the second end (212), and the second surface (232) comprises a second curved surface; The first surface (231) contacts the slurry flowing out from the first discharge port (a), and the first surface (231) includes a first curved surface.

7. The pole piece coating device according to claim 6, characterized in that: The distance between the first surface (231) located at the first end (211) and the first surface (231) located at the second end (212) tends to gradually decrease along the slurry flow direction.

8. The pole piece coating device according to claim 6, characterized in that: The third part (23) also includes a third surface (233) connecting the first surface (231) and the second surface (232), the third surface (233) is in contact with the external environment, and a first corner is formed at the connection between the third surface (233) and the first surface (231) or the second surface (232), and an insertion notch (2301) is provided at the first corner.

9. The pole piece coating device according to claim 8, characterized in that: The mold base (20) also includes an insert block, which is insertably matched with the insert notch (2301).

10. The electrode coating device according to any one of claims 4 to 9, characterized in that: The first lifting mechanism (30) or the second lifting mechanism (40) comprises a screw lifting mechanism, a hydraulic lifting mechanism, or a pneumatic lifting mechanism.

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