Die head for coating slurry and device thereof

Abstract

The utility model discloses a die head for coating slurry and a device thereof, the die head comprises a die head shell and a flow guide part, the first surface of the shell of the die head shell is recessed inwards to form a first cavity, the die head shell is provided with a feed port and a discharge port which are communicated with the first cavity, and the first cavity comprises a cavity bottom and a cavity wall; the flow guide part extends in the first cavity in the first direction, and a gap is formed between the flow guide part and the cavity bottom, so that the slurry can be uniformly distributed in the first direction, and the pressure of the slurry in each position in the first direction is balanced; the first direction is perpendicular to the flowing direction of the slurry from the feed port to the discharge port. According to the technical scheme, the flow guide body can be independently replaced according to production requirements while uniform distribution of slurry is guaranteed, inconvenience and extra cost caused by simultaneous replacement of the flow guide body and the die head are avoided, meanwhile, the effect of removing magnetic particles can be improved, and the quality of a pole piece coating can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates generally to the technical field of lithium battery manufacturing. More specifically, the present disclosure relates to a lithium battery pole piece coating device. BACKGROUND

[0002] With the development of lithium battery technology, lithium batteries are widely used in battery energy storage fields. In the manufacturing process of lithium batteries, one of the steps is to coat the pole piece, which mainly involves uniformly coating the uniformly stirred slurry on the pole piece and drying the organic solvent in the slurry. Moreover, the quality of the pole piece coating layer also affects the performance of the lithium battery.

[0003] In the pole piece coating process, if the positive and negative pole piece slurry coating thicknesses at different positions are inconsistent, it is easy to cause the battery capacity to be too low or too high, affecting the lithium precipitation phenomenon in the battery cycle process, thereby affecting the battery life. During the coating process, it is necessary to ensure that no particles, impurities, dust, etc. are mixed into the pole piece, otherwise it will cause internal short circuit of the battery, and in severe cases it may cause the battery to catch fire and explode. In the pole piece coating process, the pole piece coating layer parameters need to be consistent to reduce the battery capacity difference and cycle life difference, and to ensure the consistency of the battery performance. The large difference between the slurry before and after coating, the mixing of dust into the pole piece, and the uneven thickness of the pole piece on the left and right will affect the electrochemical performance of the battery, and further affect the life of the battery. Therefore, the pole piece coating step has an important influence on the performance and safety of the lithium battery, and it is necessary to ensure the uniformity of the pole piece coating layer.

[0004] In order to make the pole piece coating uniform, a flow guide is usually provided to make the slurry uniformly distributed. In the prior art, the flow guide is designed in a specific shape and fixedly connected with the die to make the slurry uniformly distributed. Different flow guides and dies need to be replaced for different slurries and different pole pieces, and the disassembly and assembly are relatively cumbersome. Moreover, when the flow guide is damaged, it needs to be replaced together with the die, which has a high use cost.

[0005] In addition, in order to prevent magnetic particles in the slurry from being coated on the pole piece to affect the performance of the battery, an additional strong magnetic component needs to be provided, but in the prior art, the strong magnetic component is generally provided in the slurry conveying pipeline. The slurry flows through the strong magnetic field in the pipeline during conveying to remove the magnetic particles in the slurry. However, this scheme requires the pipeline through which the slurry flows to be long enough to enable the magnetic particles in the pipeline to be fully removed, and the longer the pipeline, the greater the pressure drop of the slurry transmission, which makes it more difficult for the slurry to be transmitted into the die. Secondly, since the strong magnetic component in this technical scheme is provided in the pipeline before the slurry is transmitted to the die, the position is relatively forward, and it cannot handle the magnetic particles introduced in the die.

[0006] Therefore, there is an urgent need to provide a die for coating slurry and a device thereof technical solution, while making the slurry evenly distributed, the flow guide can be replaced individually according to the production requirements, avoid the inconvenience and additional cost caused by the flow guide and the die are replaced at the same time, but also can improve the effect of removing magnetic particles, improve the quality of the pole piece coating. Utility model content

[0007] In order to at least solve one or more technical problems as mentioned above, the present disclosure proposes a cutting device and its equipment in various aspects.

[0008] In a first aspect, the present disclosure provides a die for coating slurry, comprising a die shell and a flow guide component, the shell first surface of the die shell is inwardly recessed to form a first cavity, the die shell is provided with a feed port and a discharge port communicating with the first cavity, the first cavity comprises a cavity bottom and a cavity wall; the flow guide component is arranged in the first cavity along the first direction, the flow guide component and the cavity bottom have a gap, which can make the slurry evenly distributed along the first direction, so that the slurry pressure is balanced at each position in the first direction, the first direction is perpendicular to the direction of the slurry flowing along the feed port to the discharge port.

[0009] In some embodiments, the first surface of the first cavity is provided with a first guide rail, the second surface is provided with a second guide rail, the first guide rail and the second guide rail are oppositely arranged, and the two ends of the flow guide are respectively detachably connected to the first guide rail and the second guide rail, so that the flow guide is movably connected with the die shell.

[0010] In some embodiments, the die further comprises a strong magnetic component, which is arranged on the surface and / or inside of the flow guide component, for adsorbing magnetic particles in the slurry.

[0011] In a second aspect, the present disclosure provides a device for coating slurry, comprising a first die, the first die is any one of the dies according to the embodiments of the present disclosure, the device further comprises a second die, and a gasket located between the first die and the second die, the first die, the gasket and the second die are tightly connected in a third direction perpendicular to the first direction, the gasket side forms a first gap, and the slurry in the first cavity can flow out from the first gap.

[0012] The embodiments of the present disclosure provided above by the die head and the device for coating slurry achieve uniform distribution of the slurry along the first direction by arranging the flow guide component in the first cavity. Further, in some embodiments, by arranging the first guide rail and the second guide rail corresponding to each other in the first cavity, the flow guide body is in sliding connection with the die head shell and the flow guide body and the die head shell can be separated from each other, realizing separate replacement of the flow guide body. Still further, in some embodiments, by arranging the strong magnetic component on the surface and / or inside of the flow guide component in the first cavity, the pressure drop of slurry transmission caused by arranging the strong magnetic component is avoided, the effect of removing magnetic particles is improved, and thus the quality of the pole piece coating is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which several embodiments of the present disclosure are shown by way of example, and wherein the same or similar components are referred to with the same or similar reference numerals, in which:

[0014] Figure 1 A structural schematic diagram of the die head for coating slurry according to an embodiment of the present disclosure is shown;

[0015] Figure 2 A structural schematic diagram of the die head for coating slurry according to an embodiment of the present disclosure is shown;

[0016] Figure 3 A structural schematic diagram of the die head for coating slurry according to an embodiment of the present disclosure is shown;

[0017] Figure 4 A structural schematic diagram of the device for coating slurry according to an embodiment of the present disclosure is shown;

[0018] Figure 5 A structural schematic diagram of the gasket according to an embodiment of the present disclosure is shown.

[0019] BRIEF DESCRIPTION OF DRAWINGS

[0020] 1 - first die head, 6 - second die head, 69 - second surface of the shell, 691 - second protrusion, 7 - gasket, 71 - first notch;

[0021] 10 - die head shell, 11 - first cavity, 111 - first surface, 1111 - first guide rail, 112 - second surface, 1121 - second guide rail, 113 - third surface, 19 - first surface of the shell, 191 - first protrusion;

[0022] 20 - flow guide component, 21 - flow guide body;

[0023] 30 - feed port;

[0024] 91 - first direction, 92 - second direction, 93 - third direction. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present disclosure will be described clearly and completely in combination with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present disclosure.

[0026] It should be understood that the terms "comprise" and "include" used in the specification and claims of the present disclosure indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0027] It should also be understood that the terms used in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. As used in the specification and claims of the present disclosure, the singular forms "a", "an" and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should be further understood that the term "and / or" used in the specification and claims of the present disclosure means any combination of one or more of the associated listed items and all possible combinations thereof, and includes these combinations.

[0028] As used in the specification and claims of this document, the term "if' can be interpreted as meaning "when" or "once" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if [a described condition or event] is detected" can be interpreted to mean "once it is determined" or "in response to determining" or "once [a described condition or event] is detected" or "in response to detecting [a described condition or event]", depending on the context.

[0029] The specific embodiments of the present disclosure will be described in detail below in combination with the drawings.

[0030] Figure 1 - Figure 3 A structural schematic diagram of a die for coating slurry according to an embodiment of the present disclosure is shown.

[0031] As Figure 1 - Figure 3As shown, a die head for coating slurry includes a die head housing 10 and a flow guiding component 20. The first surface 19 of the die head housing 10 is recessed inward to form a first cavity 11. The die head housing is provided with an inlet 30 and an outlet communicating with the first cavity 11. The first cavity 11 includes a cavity bottom and a cavity wall. The flow guiding component 20 extends along a first direction 91 and is disposed in the first cavity 11. There is a gap between the flow guiding component 20 and the cavity bottom, which enables the slurry to be evenly distributed along the first direction 91, thereby making the pressure of the slurry even at each position in the first direction 91. The first direction 91 is perpendicular to the direction in which the slurry flows from the inlet to the outlet.

[0032] Specifically, the die head can apply the slurry inside the die head to the surface of the object to be coated. The die head includes a die head housing 10 and a flow guiding component 20, which is located inside the die head housing 10.

[0033] The overall shape of the die head housing 10 is not limited and can be a cube, so that a fixing device can be set on the surface of the die head to fix the die head. The first surface 19 of the die head housing 10 is recessed inward to form a first cavity 11, that is, the first cavity 11 is recessed in the opposite direction of the third direction 93. The first cavity 11 can be a cylinder with the axial direction of the first direction 91. The shape of the cross-section of the first cavity 11 perpendicular to the first direction 91 is not limited and can be rectangular or semi-circular, preferably semi-circular, to facilitate the adjustment of the angle of the flow guiding component 20 within the first cavity 11 and to facilitate manufacturing. The first cavity 11 includes a cavity bottom and a cavity wall, and the first cavity 11 composed of the cavity bottom and the cavity wall is used to contain slurry.

[0034] The first cavity 11 includes a first surface 111, a second surface 112, and a third surface 113. The first surface 111 and the second surface 112 are identical in shape and size, and are parallel to each other and perpendicular to the first direction 91. The axis of the third surface 113 is perpendicular to the first surface 111 and the second surface 112, and the first surface 111, the second surface 112, and the third surface 113 are interconnected to form the first cavity 11.

[0035] A flow guiding component 20 is provided inside the first cavity 11. The specific structure of the flow guiding component 20 is not limited. There is a gap between the flow guiding component 20 and the bottom of the cavity. Its function is to distribute the slurry in the first cavity 11 evenly along the first direction 91, so that the pressure of the slurry is even at all positions in the first direction 91. When such slurry is applied to the surface of the object to be coated, the slurry will form a more uniform coating, thereby improving the coating quality.

[0036] like Figure 1As shown, the first direction 91 is perpendicular to the direction in which the slurry flows from the inlet to the outlet, and the first direction 91, the second direction 92, and the third direction 93 are all perpendicular to each other.

[0037] In some embodiments, the cavity wall includes a first surface 111 and a second surface 112 disposed opposite to each other and perpendicular to the first direction 91, the cavity bottom includes a third surface 113 connecting the first surface 111 and the second surface 112, the flow guiding component 20 includes a flow guiding fluid 21, the flow guiding fluid 21 extends along the first direction 91 and is disposed in the first cavity 11, the two ends of the flow guiding fluid 21 along the first direction are respectively connected to the first surface 111 and the second surface 112, and there is a gap between the flow guiding fluid 21 and the third surface 113.

[0038] Specifically, the die head housing is provided with an inlet 30 and an outlet that connect to the first cavity 11. The inlet 30 is used to input slurry into the first cavity 11, and the outlet is used to output slurry from the first cavity 11. The outlet is located on a third direction 93 of the first cavity 11.

[0039] The flow guiding component 20 may include one or more flow guiding fluids 21. The flow guiding fluids 21 are generally columnar. The specific number of flow guiding fluids 21 is not limited. In this embodiment, the flow guiding component 20 includes one flow guiding fluid 21, and the axis of the flow guiding fluid is perpendicular to the first surface 111 and the second surface 112. The flow guiding fluid 21 is disposed within the first cavity 11 and is completely submerged within the first cavity 11. Simultaneously, the flow guiding fluid 21 extends along the first direction 91 within the first cavity 11. The flow guiding fluid 21 is connected to the die head housing 10, wherein the first end of the flow guiding fluid 21 along the first direction 91 is connected to the first surface 111, and the second end of the flow guiding fluid 21 along the first direction 91 is connected to the second surface 112. The first and second ends support the flow guiding fluid 21, ensuring that the flow guiding fluid 21 is in a non-contact state with the third surface 113.

[0040] In some embodiments, in the first direction 91, the cross-sectional dimension of the fluid guide 21 along the direction perpendicular to the first direction 91 first decreases and then increases; or the cross-sectional dimension of the fluid guide 21 along the direction perpendicular to the first direction 91 first increases and then decreases; or the cross-sectional dimension of the fluid guide 21 along the direction perpendicular to the first direction 91 remains unchanged.

[0041] Specifically, the cross-sections of the fluid guide 21 perpendicular to the first direction 91 can be different or the same, without restriction. When the cross-sections of the fluid guide 21 perpendicular to the first direction 91 are different, the cross-sectional dimensions of the fluid guide 21 perpendicular to the first direction 91 can first decrease and then increase, first increase and then decrease, first decrease and then increase and finally decrease, or first increase and then decrease and finally increase, without restriction on the specific pattern of cross-sectional dimension change; when the cross-sections of the fluid guide 21 perpendicular to the first direction 91 are the same, the cross-sectional dimensions of the fluid guide 21 perpendicular to the first direction 91 can remain unchanged. Based on the slurry fluid state and coating process, selecting a suitable cross-sectional dimension change pattern for the fluid guide 21 allows the slurry to form a more uniform coating, thereby improving coating quality.

[0042] In some embodiments, the third surface 113 is an arc-shaped surface, the inlet 30 is located at the middle position of the third surface 113 along the first direction 91, the cross-sectional dimension of the guide fluid 21 along the first direction 91 is the largest at the inlet 30, the guide fluid 21 is symmetrically arranged along the first direction 91 with the cross-section at the inlet 30 as the plane of symmetry, and the cross-section gradually decreases from the inlet 30 to both sides along the first direction 91.

[0043] Specifically, the third surface 113 is an arc-shaped surface that facilitates the flow of fluid through it, thus facilitating the flow of slurry. The inlet 30 is located at the middle position of the third surface 113 along the first direction 91, so that the slurry entering the first cavity 11 from the inlet 30 can be evenly distributed along the first direction 91 when flowing to the outlet.

[0044] The cross-sectional dimensions of the guide fluid 21 can vary at different points along the first direction 91. The guide fluid 21 is generally spindle-shaped. The cross-sectional dimensions of the guide fluid 21 perpendicular to the first direction 91 are largest at the inlet 30, creating a slope that facilitates the flow of slurry in both directions: towards the first surface 111 and towards the second surface 112. The guide fluid 21 is symmetrically arranged along the first direction 91 with the cross-section at the inlet 30 as its plane of symmetry, and the cross-section gradually decreases from the inlet 30 towards both sides. This allows the slurry to flow to the edges in both directions (towards the first surface 111 and towards the second surface 112) and maintains uniform slurry distribution at all points along the first direction 91.

[0045] In some embodiments, the shape of the guide fluid 21 along the cross-section perpendicular to the first direction is circular, rhomboid, or wedge-shaped.

[0046] Specifically, the shape of the cross-section of the guide fluid 21 perpendicular to the first direction 91 is not limited; for example, it can be circular, rhomboid, or wedge-shaped. A suitable cross-sectional shape is selected based on the slurry fluid state and the coating process to form a more uniform coating and improve coating quality.

[0047] In some embodiments, a first guide rail 1111 is provided on the first surface 111 of the first cavity 11, and a second guide rail 1121 is provided on the second surface 112. The first guide rail 1111 and the second guide rail 1121 are arranged opposite to each other. The two ends of the guide fluid 21 are detachably connected to the first guide rail 1111 and the second guide rail 1121, respectively, so that the guide fluid 21 is movably connected to the mold head housing 10.

[0048] Specifically, within the first cavity 11, a first guide rail 1111 is formed on the first surface 111 in the opposite direction to the first direction 91, and a second guide rail 1121 is formed on the second surface 112 in the first direction 91. Both the first guide rail 1111 and the second guide rail 1121 penetrate the first surface 19 of the housing along the third direction 93. The two guide rails 1111 and 1121 are arranged opposite to each other. The first end of the guide fluid 21 along the first direction 91 is detachably connected to the first guide rail 1111, and the second end of the guide fluid 21 along the first direction 91 is detachably connected to the second guide rail 1121, so that the guide fluid 21 and the mold housing 10 are slidably connected through the two guide rails, and when the guide fluid 21 slides, it is ensured that the axis of the guide fluid 21 remains parallel to the first direction 91. In addition, since both the first guide rail 1111 and the second guide rail 1121 penetrate the first surface 19 of the housing along the third direction 93, the first guide rail 1111 and the second guide rail 1121 are not closed guide rails. The guide fluid 21 can slide along the track towards the third direction 93 and eventually detach from the first guide rail 1111 and the second guide rail 1121, thus separating the guide fluid 21 from the mold housing 10. When the slurry fluid state and coating process change, the problem of uneven cavity pressure can be solved simply by replacing the corresponding guide fluid 21, so that the slurry in the first cavity 11 is once again evenly distributed along the first direction 91, and the pressure of the slurry is balanced at all positions in the first direction 91. When such a slurry is coated on the surface of the object to be coated, the slurry will form a more uniform coating, thereby improving the coating quality.

[0049] In some embodiments, the first guide rail 1111 includes a first groove formed by the recess of the first surface 111, and the second guide rail 1121 includes a second groove formed by the recess of the second surface 112. The first groove and the second groove are disposed opposite to each other and have the same shape. The two ends of the fluid guide 21 are respectively detachably embedded in the first groove and the second groove.

[0050] Specifically, within the first cavity 11, a first surface 111 is recessed along a first direction 91 to form a first groove, which can serve as a guide rail. A second surface 112 is also recessed along the first direction 91 to form a second groove, which can also serve as a guide rail. In this embodiment, the first groove forms the first guide rail 1111, and the second groove forms the second guide rail 1121. The two ends of the fluid guide 21 are detachably embedded in the first groove and the second groove, respectively; that is, the two ends of the fluid guide 21 are detachably connected to the first guide rail 1111 and the second guide rail 1121, respectively.

[0051] In some embodiments, rotating support members are symmetrically provided on the first surface 111 and the second surface 112, and the two ends of the fluid guide 21 are rotatably connected to the rotating support members.

[0052] Specifically, rotating supports are provided on the first surface 111 and the second surface 112 of the first cavity 11. The rotating supports are symmetrically arranged, and the guide fluid 21 is rotatably connected to the first surface 111 and the second surface 112 through the rotating supports. Because of the rotating supports, the rotation angle of the guide fluid 21 about the first direction 91 can be adjusted, while keeping the axis of the guide fluid 21 unchanged. This allows for adjustment of the contact surface between the slurry entering the first cavity 11 from the feed inlet 30 and the guide fluid 21. Therefore, the guiding effect of the guide fluid 21 can be adjusted according to the properties of the slurry, such as its composition, fluidity, and temperature, to meet production needs.

[0053] In some embodiments, the die head further includes at least one feed port 30, which is disposed on the side of the die head housing 10, and the slurry enters the first cavity 11 from the feed port 30.

[0054] Specifically, under pressure, the slurry is fed into the first cavity 11 inside the die head housing 10 through the inlet 30. In this embodiment, the die head housing 10 is provided with an inlet 30, the inlet 30 has a circular cross-section, the inlet 30 is located on the side of the die head housing 10 in the second direction 92, and penetrates the third surface 113 along the second direction 92 to enter the first cavity 11.

[0055] In some embodiments, the first protrusion 191 is formed on the first surface 19 of the mold housing 10 along the second direction 92 perpendicular to the first direction 91.

[0056] Specifically, the first surface 19 of the mold head housing 10 forms a first protrusion 191 along the second direction 92. The first protrusion 191 is generally sheet-like. The width of the first protrusion 191 along the first direction 91 is the same as the width of the mold head housing 10 along the first direction 91.

[0057] In some embodiments, the die head further includes a strong magnetic component (not shown in the figure), which is placed on the surface and / or inside the flow guide component 20 for adsorbing magnetic particles in the slurry.

[0058] Specifically, the die head also includes a strong magnetic component for adsorbing magnetic particles in the slurry. In this embodiment, the strong magnetic component is disposed on the surface and / or inside the flow guiding component 20, so that the strong magnet is placed in the slurry, and its magnetic field strength is generally greater than 7000 Gauss. By adsorbing magnetic particles in the slurry with a strong magnetic field, the performance degradation of lithium batteries caused by magnetic particles is reduced.

[0059] In existing technologies, strong magnetic components are typically installed in the slurry delivery pipeline. During the slurry's transport through the pipeline, it flows through a strong magnetic field to remove magnetic particles. However, this approach has some drawbacks. First, it requires a sufficiently long pipeline to ensure adequate removal of magnetic particles. The longer the pipeline, the greater the pressure drop during slurry transport, making it more difficult to transfer the slurry into the die. Second, because the strong magnetic component is positioned relatively far forward in the pipeline before the die, it cannot effectively handle magnetic particles introduced into the die.

[0060] Figure 4 A schematic diagram of the apparatus for coating slurry according to an embodiment of this disclosure is shown.

[0061] like Figure 4 As shown, an apparatus for coating slurry includes a first die head 1, which is any type of die head in the embodiments disclosed herein. The apparatus also includes a second die head 6 and a gasket 7 located between the first die head 1 and the second die head 6. The first die head 1, the gasket 7, and the second die head 6 are tightly connected in a third direction 93 perpendicular to the first direction 91. A first notch 71 is formed on the side of the gasket 7, through which slurry in the first cavity 11 can flow out.

[0062] Specifically, the device includes a first mold head 1, a second mold head 6, and a gasket 7. The first mold head 1 can be any type of mold head in this disclosure embodiment, while the second mold head 6 is not limited. The gasket 7 is located between the first mold head 1 and the second mold head 6, and the first mold head 1, the gasket 7, and the second mold head 6 are arranged sequentially in a third direction 93. The contact surfaces of the first mold head 1 and the gasket 7, and the contact surfaces of the gasket 7 and the second mold head 6 and the gasket 7 are all the same in shape and size. The first mold head 1, the second mold head 6, and the gasket 7 are tightly connected in the third direction 93. The method of achieving a tight connection is not limited; for example, threaded through holes or blind holes can be provided on the first mold head 1, the second mold head 6, and the gasket 7, and fasteners with corresponding threads can be used to connect and secure the three together. The upper surface of the third direction 93 of the gasket 7 is in contact with the lower surface of the third direction 93 of the second mold head 6, and the lower surface of the third direction 93 of the gasket 7 is in contact with the upper surface of the third direction 93 of the first mold head 1, and the above four planes are parallel to each other. At the same time, a first notch 71 is formed on the side of the gasket 7, and the slurry in the first cavity 11 can flow out from the first notch 71 to form a sheet-like coating along the first direction 91.

[0063] The device can distribute the slurry in the first cavity 11 of the first mold head 1 evenly along the first direction 91 by setting the guide component 20 in the first cavity 11 of the first mold head 1. This makes the pressure of the slurry in the first cavity 11 of the first mold head 1 even at each position in the first direction 91. When such slurry is applied to the surface of the object to be coated, the slurry will form a more uniform coating, thereby improving the coating quality.

[0064] The device can also slide the guide fluid 21 to the mold head housing 10 by setting corresponding first guide rails 1111 and second guide rails 1121 in the first cavity 11 of the first mold head 1, and the guide fluid 21 and the mold head housing 10 can be separated from each other, thus realizing the individual replacement of the guide fluid 21.

[0065] The device can also improve the effect of removing magnetic particles by placing a strong magnetic component on the surface and / or inside the flow guide component 20 in the first cavity 11 of the first mold head 1, thereby avoiding the pressure drop in slurry transmission caused by the strong magnetic component and improving the quality of the electrode coating.

[0066] Figure 5 A schematic diagram of the structure of a gasket according to an embodiment of this disclosure is shown.

[0067] like Figure 5 As shown, in some embodiments, the notch direction of the first notch 71 on the side of the gasket 7 is the second direction 92.

[0068] Specifically, the notch direction of the first notch 71 on the side of the gasket 7 in the second direction 92 is the second direction 92. At this time, the notch direction of the first notch 71 on the side of the gasket 7 and the first protrusion 191 of the first surface 19 of the housing of the first mold head 1 both face the second direction 92. The slurry in the first cavity 11 flows out from the first notch 71 along the first protrusion 191 towards the second direction 92, forming a sheet-like coating along the first direction 91.

[0069] In some embodiments, the side of the second mold head 6 opposite to the first surface 19 of the housing of the first mold head 1 is the second surface 69 of the housing. The second surface 69 of the housing forms a second protrusion 691 opposite to the first protrusion 191 along the second direction 92. The slurry in the first cavity 11 flows out from the first notch 71 along the gap between the first protrusion 191 and the second protrusion 691 toward the second direction 92.

[0070] At this time, the first surface 19 of the housing of the first mold head 1 and the second surface 69 of the housing of the second mold head 6 are opposite each other and clamp the gasket 7 along the third direction 93, making the three relatively stationary. A second protrusion 691 opposite to the first protrusion 191 is formed on the second surface 69 of the housing along the second direction 92. The length of the first protrusion 191 and the width of the second protrusion 691 along the first direction 91 and along the second direction 92 are the same. The size and shape of the cross-section of the first protrusion 191 and the second protrusion 691 perpendicular to the third direction 93 are the same, so a slit is formed between the first protrusion 191 and the second protrusion 691. The slurry in the first cavity 11 flows out from the first notch 71 along the slit between the first protrusion 191 and the second protrusion 691 into the second direction 92, forming a sheet-like coating along the first direction 91.

[0071] This disclosure discloses a die head and its apparatus for coating slurry, as provided above. In this embodiment, a flow guiding component is disposed within a first cavity, allowing the slurry to be uniformly distributed along the first direction. Further, in some embodiments, corresponding first and second guide rails are provided within the first cavity, enabling the flow guiding component to slide in connection with the die head housing, and allowing the flow guiding component to be separated from the die head housing, thus achieving individual replacement of the flow guiding component. Even further, in some embodiments, a strong magnetic component is disposed on the surface and / or inside the flow guiding component within the first cavity, avoiding pressure drop in slurry transport caused by the strong magnetic component, improving the removal of magnetic particles, and thereby improving the quality of the electrode coating.

[0072] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A die head for applying slurry, characterized in that, Includes a mold housing (10) and a flow guiding component (20), The first surface (19) of the die head housing (10) is recessed inward to form a first cavity (11). The die head housing is provided with an inlet (30) and an outlet that communicate with the first cavity (11). The first cavity (11) includes a cavity bottom and a cavity wall. The flow guiding component (20) extends along the first direction (91) and is disposed in the first cavity (11). There is a gap between the flow guiding component (20) and the bottom of the cavity, which enables the slurry to be evenly distributed along the first direction (91), thereby making the pressure of the slurry at each position in the first direction (91) uniform. The first direction (91) is perpendicular to the direction in which the slurry flows from the inlet to the outlet.

2. The die head according to claim 1, characterized in that, The cavity wall includes a first surface (111) and a second surface (112) that are opposite to each other and perpendicular to the first direction (91). The cavity bottom includes a third surface (113) that connects the first surface (111) and the second surface (112). The flow guiding component (20) includes a flow guiding fluid (21). The flow guiding fluid (21) extends along the first direction (91) and is disposed in the first cavity (11). The two ends of the flow guiding fluid (21) along the first direction are respectively connected to the first surface (111) and the second surface (112), and there is a gap between the flow guiding fluid (21) and the third surface (113).

3. The die head according to claim 2, characterized in that, The cross-sectional dimension of the guide fluid (21) along the direction perpendicular to the first direction (91) first decreases and then increases; or The cross-sectional dimension of the guide fluid (21) along the direction perpendicular to the first direction (91) first increases and then decreases; or The cross-sectional dimension of the fluid guide (21) remains unchanged along the direction perpendicular to the first direction (91).

4. The die head according to claim 2, characterized in that, The third surface (113) is an arc-shaped surface. The feed inlet (30) is located at the middle position of the third surface (113) along the first direction (91). The cross-sectional dimension of the guide fluid (21) along the first direction (91) is the largest at the feed inlet (30). The guide fluid (21) is symmetrically arranged in the first direction (91) with the cross-section at the feed inlet (30) as the plane of symmetry. The cross-section gradually decreases from the feed inlet (30) to both sides along the first direction (91).

5. The die head according to claim 2, characterized in that, The shape of the guide fluid (21) along the cross-section perpendicular to the first direction is circular, rhomboid, or wedge-shaped.

6. The die head according to claim 2, characterized in that, The first cavity (11) has a first guide rail (1111) on its first surface (111) and a second guide rail (1121) on its second surface (112). The first guide rail (1111) and the second guide rail (1121) are arranged opposite to each other. The two ends of the guide fluid (21) are detachably connected to the first guide rail (1111) and the second guide rail (1121) respectively, so that the guide fluid (21) is movably connected to the mold head housing (10).

7. The die head according to claim 6, characterized in that, The first guide rail (1111) includes a first groove formed by the recess of the first surface (111), and the second guide rail (1121) includes a second groove formed by the recess of the second surface (112). The first groove and the second groove are arranged opposite to each other and have the same shape. The two ends of the fluid guide (21) are respectively detachably embedded in the first groove and the second groove.

8. The die head according to claim 2, characterized in that, Rotary support members are symmetrically provided on the first surface (111) and the second surface (112), and the two ends of the guide fluid (21) are rotatably connected to the rotary support members.

9. The die head according to claim 1, characterized in that, The die head also includes a strong magnetic component, which is disposed on the surface and / or inside the flow guide component (20) for adsorbing magnetic particles in the slurry.

10. An apparatus for applying a coating slurry, characterized in that, The device includes a first mold head (1), which is the mold head according to any one of claims 1-9. The device also includes a second mold head (6) and a gasket (7) located between the first mold head (1) and the second mold head (6). The first mold head (1), the gasket (7) and the second mold head (6) are tightly connected in a third direction (93) perpendicular to the first direction (91). A first notch (71) is formed on the side of the gasket (7), and the slurry in the first cavity (11) can flow out from the first notch (71).

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