Coating pad, coating die, and coating apparatus

Abstract

The utility model discloses a kind of coating gasket, coating die and coating equipment, it is related to battery manufacturing technical field, wherein, coating gasket includes gasket body, gasket body is equipped with mutually independent first material outlet runner and second material outlet runner, first material outlet runner is second material outlet runner and blank area respectively in the opposite sides along material outlet direction;Wherein, the side wall of first material outlet runner close to blank area is first side wall, first side wall is configured as the first slurry in first material outlet runner is guided to the direction of direction away from blank area.This utility model technical scheme can prevent slurry from leaking to blank area when coating, to improve product yield.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a coating pad, a coating die, and a coating equipment. Background Technology

[0002] The battery manufacturing process includes the coating of electrode sheets. To provide higher quality batteries, an extrusion coating die is often used. A certain flow rate of slurry enters the die cavity from the feed port and forms a stable pressure. Then, it flows out from the discharge port of the coating die and is coated onto the substrate.

[0003] However, in the related technologies, the coating die head is prone to leakage of slurry into the blank areas of the substrate during coating, causing contamination of the blank areas and resulting in defective products. Utility Model Content

[0004] The main purpose of this invention is to provide a coating pad that prevents the slurry from leaking into the blank area during coating, thereby improving product yield.

[0005] To achieve the above objectives, the present invention proposes a coating pad, which includes a pad body. The pad body is provided with a first discharge channel and a second discharge channel that are independent of each other. The second discharge channel and a blank area are respectively located on opposite sides of the first discharge channel along the discharge direction.

[0006] Wherein, the side wall of the first discharge channel near the blank area is the first side wall, and the first side wall is configured to guide the first slurry in the first discharge channel in a direction away from the blank area.

[0007] In the coating pad of this utility model, an independent first discharge channel and a second discharge channel are set on the pad body. The side of the first discharge channel away from the groove of the second discharge channel along the discharge direction is a blank area. By configuring the first sidewall of the first discharge channel close to the blank area to guide the first slurry in the direction away from the blank area, the first slurry tends to flow in the direction away from the blank area when it is discharged, reducing the possibility of the first slurry penetrating into the blank area. This can reduce the defective products caused by the contamination of the blank area and improve the yield of battery manufacturing.

[0008] In one embodiment of this application, the first sidewall is an inclined surface, configured to be inclined in the direction away from the blank area along the discharge direction.

[0009] With this design, when the first slurry flows through the inclined first sidewall, the flow direction is forcibly adjusted to be consistent with the extension direction of the inclined surface, so that the first slurry flows away from the blank area until it flows out from the outlet of the first discharge channel, effectively avoiding slurry retention or lateral diffusion into the blank area, thereby improving coating quality and product yield.

[0010] In one embodiment of this application, the gasket body is further provided with a first flow channel cavity, and the inlet end of the first discharge flow channel is connected to the outlet end of the first flow channel cavity;

[0011] The first flow channel cavity is provided with a buffer section, which is configured to buffer and depressurize the first slurry in the first flow channel cavity.

[0012] This design can effectively alleviate pressure fluctuations in the first flow channel cavity and improve the stability of the first slurry flow. At the same time, the buffer section can reduce the impact force of the first slurry and prevent the first slurry from seeping out from the gap between the gasket body and the die head into the blank area.

[0013] In one embodiment of this application, the buffer section is disposed opposite to the inlet end of the first flow channel cavity and is configured to guide the first slurry in the first flow channel cavity toward the outlet end of the first flow channel cavity.

[0014] This design allows the buffer section to buffer and depressurize the first slurry flowing in along the inlet end of the first flow channel, so that the first slurry flows toward the outlet end of the first flow channel and smoothly flows into the first discharge channel.

[0015] In one embodiment of this application, the buffer portion is a guide slope formed on the cavity wall of the first flow channel; the guide slope is located on the side of the first discharge flow channel near the blank area, and the outlet end of the guide slope is connected to the inlet end of the first discharge flow channel.

[0016] This design avoids direct impact from the first slurry, reduces the flow resistance of the first slurry, mitigates the impact pressure, and prevents the first slurry from seeping out from the gap between the gasket body and the die head; at the same time, it allows the first slurry to directly enter the first discharge channel after depressurization.

[0017] In one embodiment of this application, the first discharge channel is a groove structure formed on the surface of the gasket body, and the first channel cavity is a hollow structure that penetrates the thickness direction of the gasket body.

[0018] With this design, the two side walls of the first discharge channel allow the first slurry to flow stably along a predetermined path, and the first channel cavity facilitates the rapid entry of the first slurry into the first discharge channel, serving as a buffer and pressure relief mechanism to avoid the risk of leakage caused by pressure buildup in the first slurry.

[0019] In one embodiment of this application, the gasket body includes:

[0020] Plate; and

[0021] At least two side plates are spaced apart on one side of the plate, and a second discharge channel is defined between two adjacent side plates;

[0022] The first discharge channel is located on the side plate, and the area of ​​the side plate located in the first discharge channel away from the second discharge channel is the blank area.

[0023] With this design, when the two slurries flow through the first discharge channel and the second discharge channel respectively, the solid part of the side plate blocks the contact path of the two slurries. The first slurry is restricted to flow in the first discharge channel on the surface of the side plate, while the second slurry flows directionally in the gap between adjacent side plates in the second discharge channel, which can avoid interference and mixing of the two slurries.

[0024] In one embodiment of this application, the blank area of ​​the side plate is provided with a mounting groove for installing a seal.

[0025] This design, by installing a seal at the mounting groove, allows the coating gasket to fit tightly with the die head, preventing slurry leakage.

[0026] In one embodiment of this application, the number of side plates is three or more, wherein the two side plates located at both ends of the plate body are side plates, and the side plates other than the two side plates are flow dividers; a flow divider is provided between two adjacent second discharge channels, and two first discharge channels are respectively provided on both sides of the flow divider corresponding to the two second discharge channels, and a blank area is formed between two adjacent first discharge channels; the mounting groove is provided between two adjacent first discharge channels.

[0027] With this design, when the first slurry is discharged from the first discharge channel, the first discharge channels on both sides guide the first slurry away from the blank area, so that the first slurry flowing out of the two first discharge channels of each diverter plate is used to seal the second slurry of the second discharge channels on both sides. The mounting groove is located in the blank area between adjacent first discharge channels, which utilizes the structural area of ​​the diverter plate and improves the structural compactness.

[0028] In one embodiment of this application, a thinning member is provided on the side of the side plate near the second discharge channel, and the thinning member is located at the outlet of the second discharge channel; the thinning member includes a first thinning part and a second thinning part connected in a stepped manner, the first thinning part is connected to the side plate, and the second thinning part is located on the side of the first thinning part away from the side plate; wherein, the thickness of the first thinning part is greater than the thickness of the second thinning part.

[0029] With this design, when the second slurry flows through the outlet of the second discharge channel, the thickness of the first thinning part is greater than that of the second thinning part, making the slurry thickness thinner closer to the edge of the second slurry. This ensures the consistency of the second slurry edge when the electrode is squeezed in subsequent processes.

[0030] In one embodiment of this application, the first discharge channel has a second sidewall close to the second discharge channel, the second sidewall being configured as an inclined surface oriented towards the second discharge channel; the outlet of the second discharge channel is provided with an inclined surface oriented towards the first discharge channel; the outlet of the first discharge channel and the outlet of the second discharge channel are spaced apart.

[0031] This design allows the two slurries to match at the edges, while the outlets of the first and second discharge channels are spaced apart to avoid direct proximity between the two outlets, thus creating isolation and preventing the two slurries from mixing and interfering.

[0032] To achieve the above objectives, this application also provides a coating die head, including an upper die head, a lower die head, and the aforementioned coating pad, wherein the coating pad is sandwiched between the upper die head and the lower die head; the upper die head is provided with a first slurry channel communicating with the first discharge channel; and the lower die head is provided with a second slurry channel communicating with the second discharge channel.

[0033] In one embodiment of this application, the coating die head further includes a sealing element, and the blank area of ​​the coating gasket is provided with a mounting groove. The sealing element is installed in the mounting groove and is sealed to the upper die head or the lower die head.

[0034] This design eliminates gaps caused by process or assembly issues, ensuring a tight fit between the coating pad and the upper or lower die head, preventing slurry leakage.

[0035] To achieve the above objectives, this application also provides a coating apparatus, including a feeding assembly and the above-mentioned coating die head, wherein the feeding assembly is configured to feed material to the first slurry channel and / or the second slurry channel.

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

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of an embodiment of the coated gasket of this utility model;

[0039] Figure 2 for Figure 1 A magnified view of a section at point M;

[0040] Figure 3 for Figure 1 A magnified view of a portion of point N in the middle;

[0041] Figure 4 for Figure 1 Back view of the embodiment;

[0042] Figure 5 for Figure 1 A perspective view of the embodiment.

[0043] Explanation of icon numbers:

[0044] label name label name 1 gasket body 102 Second discharge channel 11 plate body 103 blank area 12 Side panel 104 First flow channel cavity 12a Side plate 1041 Buffer section 12b Distributor 105 Mounting slot 101 First discharge channel 2 Thinned parts 1011 First side wall 21 First thinning section 1012 Second side wall 22 Second thinning section

[0045] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0047] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0048] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0049] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0050] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0051] The coating process described in this application is a crucial part of the production of electrode assemblies for power batteries. These electrode assemblies are the components within a single battery cell where electrochemical reactions occur. A single battery cell may contain one or more electrode assemblies. Electrode assemblies are primarily formed by winding or stacking positive and negative electrode sheets. During electrode assembly production, the positive or negative electrode sheets undergo a coating process. In this process, positive and negative electrode slurries are applied to the battery electrode sheets. After coating, the positive or negative electrode sheet includes a coated portion and an uncoated portion. The coated portion forms the main body through winding or stacking, while the uncoated portions are stacked to form tabs. The positive and negative electrode tabs can be located together at one end of the main body or separately at both ends. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop.

[0052] In related technologies, when the coating die is applied to the substrate under the pressure inside the die cavity, the slurry may spread laterally to the blank area or stick to the lip of the blank area of ​​the die. This can easily cause the slurry to leak into the blank area of ​​the substrate. The residue in the blank area of ​​the substrate may react with the electrolyte during the battery formation stage, resulting in lithium plating at the edge of the negative electrode or local deactivation of the positive electrode active material, producing defective products.

[0053] Therefore, this utility model proposes a coating pad, which aims to improve the structure of the slurry outlet channel so that the slurry flows away from the blank area, preventing the slurry from seeping into the blank area and causing contamination. The structure of this coating pad will be described below by way of embodiments.

[0054] like Figures 1 to 3 As shown, the coating pad includes a pad body 1. The pad body 1 has a first discharge channel 101 and a second discharge channel 102 that are independent of each other. The first discharge channel 101 has a second discharge channel 102 and a blanking area 103 on opposite sides along the discharge direction, respectively. The side wall of the first discharge channel 101 near the blanking area 103 is a first side wall 1011. The first side wall 1011 is configured to guide the first slurry in the first discharge channel 101 in a direction away from the blanking area 103.

[0055] The gasket body 1 can be made of a wear-resistant and corrosion-resistant metal material. The gasket body 1 has two independent discharge channels 101 and 102. The two slurry flow paths are isolated and not interconnected. This can be achieved by creating separate grooves or perforated structures on the gasket body 1, physically isolating different slurries to prevent mixing or interference during flow. Optionally, the first slurry flowing in the first discharge channel 101 is a ceramic slurry with insulating properties; the second slurry flowing in the second discharge channel 102 is a slurry containing active substances. During coating, the second slurry containing active substances flowing out of the second discharge channel 102 coats the surface of the substrate (such as aluminum foil) to form an active substance layer, while the first slurry flowing out of the first discharge channel 101 coats both sides of the active substance layer to form an insulating layer.

[0056] The blank area 103 is located on the side of the first discharge channel 101 away from the second discharge channel 102. It can be understood that the first slurry flowing out of the first discharge channel 101 plays a sealing role for the second slurry flowing out of the second discharge channel 102. During coating, the blank area 103 corresponds to the uncoated part of the electrode sheet and can be stacked to form an electrode tab.

[0057] The sidewall of the first discharge channel 101 near the blank area 103 is a first sidewall 1011. The first sidewall 1011 is configured to guide the first slurry in the first discharge channel 101 in a direction away from the blank area 103. It can be understood that the first sidewall 1011 is formed as a guiding surface for the first slurry, which can be achieved by using a slope or arc-shaped surface structure, etc. By changing the flow direction of the first slurry in the first discharge channel 101 to guide it in a direction away from the blank area 103, the first slurry has a tendency to flow in a direction away from the blank area 103 when it is discharged, thereby preventing the first slurry from diffusing towards the blank area 103.

[0058] In summary, in the coating pad of this utility model, by setting an independent first discharge channel 101 and a second discharge channel 102 on the pad body 1, wherein the first discharge channel 101 has a blank area 103 on the side away from the groove of the second discharge channel 102 along the discharge direction, by configuring the first sidewall 1011 of the first discharge channel 101 close to the blank area 103 to guide the first slurry in the direction away from the blank area 103, the first slurry has a tendency to flow in the direction away from the blank area 103 when it is discharged, reducing the possibility of the first slurry penetrating into the blank area 103, thereby reducing the defective products caused by the contamination of the blank area 103 and improving the yield of battery manufacturing.

[0059] Please see Figure 2 and Figure 3 In one embodiment of this application, the first sidewall 1011 is an inclined surface and is configured to be inclined in the direction away from the blank area 103 along the discharge direction.

[0060] Understandably, the slope of the first sidewall 1011 can be achieved in various ways, such as a planar slope or a curved slope. Optionally, the slope surface can also be provided with a flow guide texture.

[0061] With this design, when the first slurry flows through the inclined first sidewall 1011, the flow direction is forcibly adjusted to be consistent with the extension direction of the inclined surface, so that the first slurry flows away from the blank area 103 until it flows out from the outlet of the first discharge channel 101, effectively avoiding slurry retention or lateral diffusion to the blank area 103, thereby improving coating quality and product yield.

[0062] Please see Figures 2 to 4 In one embodiment of this application, the gasket body 1 is further provided with a first flow channel cavity 104, the inlet end of the first discharge flow channel 101 is connected to the outlet end of the first flow channel cavity 104; a buffer part 1041 is provided in the first flow channel cavity 104, which is configured to buffer and depressurize the first slurry in the first flow channel cavity 104.

[0063] The first flow channel cavity 104 can be understood as an auxiliary cavity on the gasket body 1 for the flow of the first slurry. The first slurry first flows into the first flow channel cavity 104 and then into the first discharge channel 101. The first flow channel cavity 104 can buffer and equalize the pressure of the first slurry, allowing the first slurry to enter the first discharge channel 101 more evenly. A buffer section 1041 is provided in the first flow channel cavity 104. The buffer section 1041 can buffer and relieve pressure on the first slurry, preventing the pressure of the first slurry flowing into the first flow channel cavity 104 from being too high and leaking out from the gap between the gasket body 1 and the die head. Optionally, the buffer section 1041 can be a baffle, a guide surface, a cavity expansion structure, or some other structure.

[0064] This design can effectively alleviate pressure fluctuations in the first flow channel cavity 104 and improve the stability of the first slurry flow. At the same time, the buffer part 1041 can reduce the impact force of the first slurry and prevent the first slurry from seeping out from the gap between the gasket body 1 and the die head into the blank area 103.

[0065] Please see Figure 2 and Figure 3 In one embodiment of this application, the buffer section 1041 is disposed opposite to the inlet end of the first flow channel cavity 104 and is configured to guide the first slurry in the first flow channel cavity 104 toward the outlet end of the first flow channel cavity 104.

[0066] With this design, the buffer section 1041 can buffer and depressurize the first slurry flowing in along the inlet end of the first flow channel cavity 104, so that the first slurry flows toward the outlet end of the first flow channel cavity 104 and flows smoothly into the first discharge channel 101.

[0067] Please see Figure 2 and Figure 3 In one embodiment of this application, the buffer portion 1041 is a guide slope formed on the cavity wall of the first flow channel cavity 104; the guide slope is located on the side of the first discharge flow channel 101 near the blank area 103, and the outlet end of the guide slope is connected to the inlet end of the first discharge flow channel 101.

[0068] Understandably, the guide slope can be a planar inclined wall or a curved inclined wall. The guide slope is disposed opposite to the inlet end of the first flow channel cavity 104. When the first slurry enters the first flow channel cavity 104 from the inlet end, the guide slope can force the first slurry to flow toward the outlet end of the first flow channel cavity 104. Compared with the parallel and facing walls in related technologies, this embodiment can avoid the first slurry from impacting the front, reduce the flow resistance of the first slurry, and reduce the impact pressure, thereby preventing the first slurry from seeping out from the gap between the gasket body 1 and the die head.

[0069] In addition, the guide slope is located on the side of the first discharge channel 101 near the blank area 103, so that the first slurry can directly enter the first discharge channel 101 after depressurization, avoiding the slurry from overflowing into the blank area 103 due to path deviation or pressure fluctuation. This not only buffers the depressurization but also controls the flow path of the slurry and improves the coating quality.

[0070] Please see Figure 1 , Figure 4 and Figure 5 In one embodiment of this application, the first discharge channel 101 is a groove structure formed on the surface of the gasket body 1, and the first channel cavity 104 is a hollow structure that penetrates the thickness direction of the gasket body 1.

[0071] Understandably, the first discharge channel 101 can be a U-shaped groove structure on the surface of the gasket body 1, having opposing first sidewalls 1011 and second sidewalls 1012, and a bottom wall connecting the first sidewalls 1011 and second sidewalls 1012. The opening of the first discharge channel 101 is opposite to the bottom wall. Optionally, this groove structure can be directly formed on the surface of the gasket body 1 by machining, creating a groove extending along the discharge direction.

[0072] The first flow channel cavity 104 can be designed as a hollow structure that extends through the thickness direction of the gasket body 1. For example, holes can be drilled or cut in the gasket body 1 so that the first flow channel cavity 104 extends from one side of the gasket body 1 to the other side. This through-type hollow design not only facilitates the rapid entry of slurry into the first discharge channel 101, but also enhances the pressure relief effect through the through structure.

[0073] With this design, the two side walls of the first discharge channel 101 enable the first slurry to flow stably along a predetermined path, and the first channel cavity 104 facilitates the rapid entry of the first slurry into the first discharge channel 101, serving as a buffer and pressure relief mechanism to avoid the risk of leakage caused by pressure buildup in the first slurry.

[0074] Please see Figures 1 to 4 In one embodiment of this application, the gasket body 1 includes a plate 11 and at least two side plates 12. The at least two side plates 12 are spaced apart on one side of the plate 11, and a second discharge channel 102 is defined between two adjacent side plates 12. A first discharge channel 101 is provided on the side plate 12, and the area of ​​the side plate 12 located in the first discharge channel 101 away from the second discharge channel 102 is a blank area 103.

[0075] Understandably, the plate 11 is the main structure of the gasket body 1, equivalent to a basic support structure, providing a stable carrier for the arrangement of the side plates 12. Optionally, the plate 11 can be made of a metal material, such as stainless steel or aluminum alloy, to provide sufficient strength and stability. At least two side plates 12 are spaced apart on one side of the plate 11, and the side plates 12 can be made of the same or different material as the plate 11. Optionally, the number of side plates 12 can be determined according to the actual situation, for example, there can be two, three or more.

[0076] A second discharge channel 102 is defined between two adjacent side plates 12. It is understood that the two adjacent second discharge channels 102 are separated by the side plates 12. A first discharge channel 101 is located on the side plate 12 and can be directly formed on the surface of the side plate 12 by machining or molding. A blank area 103 is located on the side plate 12 away from the second discharge channels 102, and is isolated by the solid structure of the side plate 12.

[0077] With this design, when the two slurries flow through the first discharge channel 101 and the second discharge channel 102 respectively, the solid part of the side plate 12 blocks the contact path of the two slurries. The first slurry is confined to flow within the first discharge channel 101 on the surface of the side plate 12, while the second slurry flows directionally within the gap between adjacent side plates 12 in the second discharge channel 102, which can prevent the two slurries from interfering with and mixing.

[0078] Please see Figure 2 and Figure 3 In one embodiment of this application, the blank area 103 of the side plate 12 is provided with a mounting groove 105 for installing a seal.

[0079] Understandably, when the coating gasket is installed inside the coating die, gaps may exist between the coating gasket and the die wall due to process or assembly errors, potentially causing slurry leakage. Therefore, in this embodiment, a mounting groove 105 is provided on the side plate 12. By installing a sealant in the mounting groove 105, the coating gasket can fit tightly with the die, preventing slurry leakage.

[0080] In practical applications, the mounting groove 105 can be formed on the surface of the side plate 12, and can be located on the same surface or a different surface of the side plate 12 as the first discharge channel 101. Optionally, the cross-sectional shape of the mounting groove 105 can be rectangular, semi-circular, or trapezoidal, etc., to accommodate different types of seals. Optionally, the seal can be a sealing strip with a certain degree of elasticity, such as rubber or silicone, which forms a compression seal when the side plate 12 is assembled with the die head.

[0081] By placing the mounting groove 105 in the blank area 103, the fit between the side plate 12 and the die head near the discharge port can be improved, preventing the first slurry in the first flow channel cavity 104 from seeping out from the gap between the coating pad and the die head into the blank area 103.

[0082] Please see Figures 1 to 4 In one embodiment of this application, the number of side plates 12 is three or more, wherein the two side plates 12 located at both ends of the plate body 11 are side plates 12a, and the side plates 12 other than the two side plates 12a are diversion plates 12b; a diversion plate 12b is provided between two adjacent second discharge channels 102, and two first discharge channels 101 are respectively provided on both sides of the two second discharge channels 102, and a blank area 103 is formed between two adjacent first discharge channels 101; the mounting groove 105 is provided between two adjacent first discharge channels 101.

[0083] In this embodiment, side plates 12a are arranged at both ends of the plate body 11 to fix the overall structure. The number of diversion plates 12b is determined according to the number of second discharge channels 102. For example, when there are three second discharge channels 102, the number of diversion plates 12b is two. The first discharge channels 101 on both sides of the diversion plate 12b can be configured as a symmetrical structure, and the blank area 103 is located between the two first discharge channels 101. The mounting groove 105 can extend along the transverse direction of the diversion plate 12b to make the force on the diversion plate 12b more uniform. In practical applications, the mounting groove 105 can also be provided on the side plate 12a.

[0084] With this design, when the first slurry is discharged from the first discharge channel 101, the first discharge channels 101 on both sides guide the first slurry away from the blank area 103, so that the first slurry flowing out of the two first discharge channels 101 of each diverter plate 12b is used to seal the edges of the second discharge channels 102 on both sides. The mounting groove 105 is located in the blank area 103 between adjacent first discharge channels 101, utilizing the structural area of ​​the diverter plate 12b to improve the structural compactness.

[0085] Please see Figures 2 to 3 In one embodiment of this application, a thinning member 2 is provided on the side of the side plate 12 near the second discharge channel 102. The thinning member 2 is located at the outlet of the second discharge channel 102. The thinning member 2 includes a first thinning part 21 and a second thinning part 22 connected in a stepped manner. The first thinning part 21 is connected to the side plate 12, and the second thinning part 22 is located on the side of the first thinning part 21 away from the side plate 12. The thickness of the first thinning part 21 is greater than the thickness of the second thinning part 22.

[0086] Understandably, the thickness of the thinning part 2 is less than the thickness of the side plate 12. When the second slurry passes through the thinning part 2, it can be thinned, thus enabling the edge of the second slurry to form a thinning zone when it is coated on the electrode through the second discharge channel 102. The stepped first thinning part 21 and the second thinning part 22 can adopt a stepped structure with right-angle or rounded transitions. The first thinning part 21 and the side plate 12 can be integrally formed or welded together, and the second thinning part 22 and the first thinning part 21 can be integrally formed or welded together.

[0087] With this design, when the second slurry flows through the outlet of the second discharge channel 102, the thickness of the first thinning part 21 is greater than that of the second thinning part 22, making the slurry thickness thinner closer to the edge of the second slurry. This ensures the consistency of the second slurry edge when the electrode is squeezed in subsequent processes.

[0088] Please see Figures 2 to 3In one embodiment of this application, the first discharge channel 101 has a second sidewall 1012 near the second discharge channel 102, and the second sidewall 1012 is configured as an inclined surface inclined toward the second discharge channel 102; the outlet of the second discharge channel 102 is provided with an inclined surface inclined toward the first discharge channel 101; the outlet of the first discharge channel 101 and the outlet of the second discharge channel 102 are spaced apart.

[0089] In this embodiment, by setting the second sidewall 1012 as an inclined surface sloping towards the second discharge channel 102, and correspondingly setting the outlet edge of the second discharge channel 102 as a reverse inclined surface sloping towards the first discharge channel 101, the first slurry and the second slurry can interact when they flow out, forming a counteracting flow field, so that the first slurry can seal the second slurry; at the same time, the outlet of the first discharge channel 101 and the outlet of the second discharge channel 102 are spaced apart to avoid the two outlets being directly adjacent, forming isolation and avoiding interference between the two slurries.

[0090] This utility model also proposes a coating die head, which includes an upper die head, a lower die head, and a coating pad. The specific structure of the coating pad is as described in the above embodiments. Since this coating die head adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0091] The coating pad is sandwiched between the upper die head and the lower die head; the upper die head is provided with a first slurry channel communicating with the first discharge channel 101; the lower die head is provided with a second slurry channel communicating with the second discharge channel 102.

[0092] In this embodiment, when the coating gasket is assembled between the upper and lower die heads, the upper and lower die heads can encapsulate the first discharge channel 101, the second discharge channel 102, the second slurry channel, and the first slurry channel to prevent slurry leakage.

[0093] In one embodiment of this application, the coating die head further includes a sealing element. The blank area 103 of the coating gasket is provided with a mounting groove 105. The sealing element is installed in the mounting groove 105 and is sealed to the upper die head or the lower die head.

[0094] In this embodiment, by providing a seal between the coating gasket and the upper or lower die head, gaps caused by process or assembly reasons can be eliminated, ensuring a tight fit between the coating gasket and the upper or lower die head and preventing slurry leakage.

[0095] This utility model also proposes a coating device, which includes a feeding assembly and a coating die. The specific structure of the coating die is as described in the above embodiments. Since this coating device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The feeding assembly is configured to feed material to the first slurry channel and / or the second slurry channel.

[0096] Understandably, the feeding assembly is the slurry supply source, and the slurry output from the feeding assembly can be introduced into the first slurry channel and / or the second slurry channel through pipelines.

[0097] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A coated gasket, characterized in that, Includes a gasket body, the gasket body having a first discharge channel and a second discharge channel that are independent of each other, the first discharge channel having the second discharge channel and a blank area on opposite sides along the discharge direction respectively; Wherein, the side wall of the first discharge channel near the blank area is the first side wall, and the first side wall is configured to guide the first slurry in the first discharge channel in a direction away from the blank area.

2. The coated gasket as described in claim 1, characterized in that, The first sidewall is an inclined surface and is configured to be inclined in the direction away from the blank area along the discharge direction.

3. The coated gasket as described in claim 1, characterized in that, The gasket body is further provided with a first flow channel cavity, and the inlet end of the first discharge flow channel is connected to the outlet end of the first flow channel cavity. The first flow channel cavity is provided with a buffer section, which is configured to buffer and depressurize the first slurry in the first flow channel cavity.

4. The coated gasket as described in claim 3, characterized in that, The buffer section is disposed opposite to the inlet end of the first flow channel cavity and is configured to guide the first slurry in the first flow channel cavity toward the outlet end of the first flow channel cavity.

5. The coated gasket as described in claim 4, characterized in that, The buffer section is a guide slope formed on the cavity wall of the first flow channel; The guide ramp is located on the side of the first discharge channel near the blank area, and the outlet end of the guide ramp is connected to the inlet end of the first discharge channel.

6. The coated gasket as described in any one of claims 3 to 5, characterized in that, The first discharge channel is a groove structure formed on the surface of the gasket body, and the first channel cavity is a hollow structure that penetrates the thickness direction of the gasket body.

7. The coated gasket as described in any one of claims 1 to 5, characterized in that, The gasket body includes: Plate; and At least two side plates are spaced apart on one side of the plate, and a second discharge channel is defined between two adjacent side plates; The first discharge channel is located on the side plate, and the area of ​​the side plate located in the first discharge channel away from the second discharge channel is the blank area.

8. The coated gasket as described in claim 7, characterized in that, The blank area of ​​the side plate is provided with a mounting groove for installing a seal.

9. The coated gasket as described in claim 8, characterized in that, The number of side plates is three or more, wherein the two side plates located at both ends of the plate body are side plates, and the side plates other than the two side plates are diversion plates; A flow divider is provided between two adjacent second discharge channels. The flow divider is provided with two first discharge channels on each side of the two second discharge channels. The space between two adjacent first discharge channels is set as the blank area. The mounting slot is located between two adjacent first discharge channels.

10. The coated gasket as described in claim 7, characterized in that, The side plate is provided with a thinning part on the side near the second discharge channel, and the thinning part is located at the outlet of the second discharge channel; The thinning part includes a first thinning section and a second thinning section connected in a stepped manner. The first thinning section is connected to the side plate, and the second thinning section is located on the side of the first thinning section opposite to the side plate. The thickness of the first thinned portion is greater than the thickness of the second thinned portion.

11. The coated gasket as described in any one of claims 1 to 5, characterized in that, The first discharge channel has a second sidewall close to the second discharge channel, and the second sidewall is configured as an inclined surface sloping toward the second discharge channel; The outlet of the second discharge channel is provided with an inclined surface that slopes toward the first discharge channel; The outlet of the first discharge channel and the outlet of the second discharge channel are spaced apart.

12. A coating die head, characterized in that, It includes an upper die head, a lower die head, and a coating pad as described in any one of claims 1 to 11, wherein the coating pad is sandwiched between the upper die head and the lower die head; The upper die head is provided with a first slurry channel communicating with the first discharge channel; the lower die head is provided with a second slurry channel communicating with the second discharge channel.

13. The coating die head as described in claim 12, characterized in that, The coating die head also includes a sealing element. The blank area of ​​the coating gasket is provided with a mounting groove. The sealing element is installed in the mounting groove and is sealed to the upper die head or the lower die head.

14. A coating apparatus, characterized in that, It includes a feeding assembly and a coating die as described in claim 12 or 13, wherein the feeding assembly is configured to feed material into the first slurry channel and / or the second slurry channel.

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