CN220444235U - Coating gasket and slurry coating device - Google Patents

Abstract

The utility model provides a coating the gasket and the slurry coating device are arranged on the surface of the gasket, relates to the technical field of slurry coating, wherein the coating gasket comprises: the gasket body and the baffle convex strips are arranged on the gasket body; the gasket body comprises a transverse main board is arranged on the upper surface of the main board, is arranged on the transverse main board vertical plates at two ends; the transverse main plate and the vertical plate are surrounded to form a collecting tank; the baffle convex strips are connected with the gasket body, are arranged in the collecting groove and correspond to the feeding holes of the die head, and the length of the baffle convex strips is smaller than that of the vertical plates. The coated gasket provided by the utility model ensures the stability of the pressure inside the collecting tank, further, the stability of the density of the coated surface is ensured, the problems that the pressure in the cavity of the collecting tank is not easy to stabilize and the surface density is not easy to stabilize caused by the fact that the fluid slurry is directly sprayed out from the front opening are avoided.

Description

Coating gasket and slurry coating device

Technical Field

The utility model relates to the technical field of slurry coating, in particular to a coating gasket and a slurry coating device.

Background

At present, the current time of the process, the prior battery pole piece is prepared, the double-sided coating method is mostly adopted, and is based on a double-sided coater. The double-sided coating machine is provided with a coating device, namely a coating head. The structure can include: an upper die, a lower die, and a gasket.

After the slurry is input, the slurry enters a die cavity of a coating device through a feed inlet of the die, and the coating width of the pole piece is determined by the opening size of the gasket.

The sizing agent is fed into a die head after being pressurized by a screw pump, and is sprayed onto the aluminum foil through the position of the hollow opening of the gasket. The faster the coating speed, the greater the pump speed and the greater the pressure in the chamber.

The slurry belongs to fluid, and the higher the fluidity is, the lower the transverse surface density and the longitudinal surface density are, the less stable is. The gasket in the existing coating device has the problems of high fluidity, unstable transverse surface density and longitudinal surface density, unstable pole piece surface density, and consequent lithium precipitation, unstable capacity, difficult module assembly and the like of the battery, so that the battery cannot be shipped.

Disclosure of Invention

To solve the above-mentioned drawbacks, the present utility model provides a coated gasket comprising:

the gasket comprises a gasket body and a baffle convex strip arranged on the gasket body;

the gasket body comprises a transverse main plate and vertical plates arranged at two ends of the transverse main plate;

the transverse main plate and the vertical plate are surrounded to form a collecting tank;

the baffle convex strips are connected with the gasket body, are arranged in the collecting groove and correspond to the feeding holes of the die head, and the length of the baffle convex strips is smaller than that of the vertical plates.

Preferably, at least 2 barrier ribs arranged in parallel are arranged in the coating gasket.

Preferably, the coating shim corresponds to a feed port in the die to which it is attached; wherein, on the horizontal mainboard of coating gasket, respectively be provided with in the both ends of the corresponding position department of feed inlet separate the shelves sand grip.

Preferably, the collection tank comprises a separation zone, and an overflow zone outside the separation zone;

the separation area is an area formed by taking two adjacent separation convex strips as side edges, taking the transverse main board as a bottom boundary and taking parallel lines of the end heads of the two separation convex strips as a top boundary;

the overflow area is an area which is surrounded by the side edges of the vertical plates from the transverse main plate to the opening of the coating gasket and is outside the separation area, and the slurry entering from the feeding hole can overflow to the overflow area after entering the separation area.

Preferably, the length of the baffle rib is not more than one half of the length of the vertical riser.

The width of the baffle convex strips is not more than one eighth of the distance between the inner sides of the two vertical risers and is more than one tenth of the distance between the inner sides of the two vertical risers.

Preferably, the baffle convex strip comprises a baffle body connected with the transverse main board and a baffle head arranged at the end of the baffle body far away from the transverse main board;

the baffle head is arc-shaped.

Preferably, two lateral sides of the baffle body of the baffle convex strip are respectively provided with an arc-shaped slurry groove extending along the length direction of the baffle body.

Preferably, the baffle head comprises an arc part at the front end and connecting grooves with two side surfaces connected with the slurry groove;

the connecting grooves are connected with the slurry grooves on the corresponding side surfaces and are in the same straight line, so that the slurry can flow from the slurry grooves to the connecting grooves of the baffle head.

Preferably, the baffle head comprises a head body and an arc-shaped groove arranged on the head body;

the arc-shaped groove surrounds the head body, is arranged in a semicircular arc shape at the front end of the baffle head, and is respectively connected with the slurry grooves at two sides.

In addition, in order to solve the above problems, the present utility model also provides a slurry coating apparatus comprising:

an upper die, a lower die, and a feed inlet, and a coated gasket as described above;

wherein the upper end die head and the lower end die head can be correspondingly combined; the coating gasket can be placed between the upper end die and the lower end die when the upper end die and the lower end die are correspondingly combined;

the slurry coating device comprises at least one feeding hole, and in the coating gasket, two ends of each feeding hole, which correspond to the positions, are respectively provided with one baffle convex strip.

A coated gasket and slurry coating device, wherein the coated gasket comprises: the gasket comprises a gasket body and a baffle convex strip arranged on the gasket body; the gasket body comprises a transverse main plate and vertical plates arranged at two ends of the transverse main plate; the transverse main plate and the vertical plate are surrounded to form a collecting tank; the baffle convex strips are connected with the gasket body, are arranged in the collecting groove and correspond to the feeding holes of the die head, and the length of the baffle convex strips is smaller than that of the vertical plates. According to the utility model, the baffle convex strips with the length smaller than that of the vertical plates are arranged in the collecting tank, so that the slurry input by the feed inlet flows to other areas after being separated by the baffle convex strips in the collecting tank before being sprayed to the front opening of the gasket, the stability of the internal pressure of the collecting tank is ensured, the stability of the coating surface density is further ensured, and the problems that the internal pressure of a cavity of the collecting tank is not easy to stabilize and the surface density is not easy to stabilize due to the fact that the fluid slurry is directly sprayed out from the front opening are avoided.

Drawings

FIG. 1 is a schematic plan view of a coated gasket of the present utility model (1 inlet, 2 ribs);

FIG. 2 is a schematic plan view of a coated gasket of the present utility model (2 feed inlets, 3 barrier ribs);

FIG. 3 is a schematic view of the structure of a collecting tank of the coated gasket of the present utility model;

FIG. 4 is a schematic view of a spacer rib structure of a coated gasket according to the present utility model;

FIG. 5 is a schematic view of the structure of a spacer body of the coated gasket of the present utility model;

FIG. 6 is a schematic view of a spacer head of a spacer bead of a novel conventional coating spacer;

FIG. 7 is a schematic view of another spacer head structure in the spacer ribs of the coated gasket of the present utility model;

fig. 8 is an exploded view of the slurry coating apparatus of the present utility model.

Reference numerals:

100, a slurry coating device; 1, coating a gasket; 11, a gasket body; 111, a transverse main board; 112, vertical risers; 113, a collection tank; 1131, a separation region; 1132, an overflow region; 12, a baffle convex strip; 121, a spacer body; 1211, slurry tank; 122, a spacer head; 1221, a circular arc portion; 1222, connecting grooves; 1223, a head body; 1224, arcuate slots; 2, a feed inlet; 3, an upper die head; 4, a lower end die head.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, 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 orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples:

referring to fig. 1, in this embodiment, there is provided a coated gasket 1 comprising:

a gasket body 11 and a spacer protruding strip 12 provided on the gasket body 11;

the gasket body 11 includes a transverse main board 111, and vertical risers 112 provided at two ends of the transverse main board 111;

the transverse main plate 111 and the vertical plate 112 are surrounded to form a collecting tank 113;

the baffle protruding strips 12 are connected with the gasket body 11, are arranged in the collecting groove 113 and correspond to the feeding hole 2 of the die head, and the length of the baffle protruding strips 12 is smaller than that of the vertical riser 112.

In the above-mentioned lithium ion battery production process, the coating process is one of the important processes, and this process means that the slurry is uniformly coated on the current collector and dried, and the effect of the coating has an important influence on the performance of the battery. At present, extrusion coating is widely adopted in production, and a gasket is required to be arranged at a die head in the coating mode, so that the gasket has extremely important influence on the density, uniformity, edge thinning and the like of a coating surface.

In the production of lithium ion batteries, extrusion coating refers to coating electrode materials, such as cathode materials and anode materials, on an electrode foil by extrusion. Extrusion coating can uniformly cover the electrode material on the electrode foil, and the thickness of the electrode material can be controlled.

The specific process of extrusion coating is as follows: the cathode or anode material is placed in an extrusion coater and then pressed into the electrode foil by high pressure so that the material is uniformly distributed on the foil. The extrusion coater can be adjusted according to the production requirements to control the thickness of the electrode material.

In extrusion coating, the die and shim are one of the main components of the coater.

The die is the core component of the coater that is used to produce the coating of the material. The shape and size of the die head can be adjusted according to the production requirements so as to adapt to different coating tasks. The die head may include upper and lower splice components with a gasket mounted therebetween for receiving the slurry and coating through the front opening. The shims are typically replaceable and may be adjusted according to the production requirements.

The die and shim mounting method is as follows: the die and shim were prepared and checked for any damage. Suitable dies and shims are selected according to the production requirements. The die was mounted at the front end of the coater and the shim was mounted in the die. The die and shim connection was checked to ensure that they were firmly mounted in place.

The methods of use of the die and gasket are as follows: cathode or anode material is placed in a coater. The coater is opened and the pressure is adjusted to suit the production requirements. The electrode foil is placed in a coater and the material is coated onto the electrode foil through a die and a gasket. The coating effect is checked and the pressure can be adjusted again if necessary.

The coater may be of an existing brand and model, and may include, for example, but not limited to: heraeus Group: various types of extrusion coaters are provided, including Heraeus H1140 and Heraeus H600.EBRO ARMATUREN: various types of extrusion coaters are provided, including EBRO E8 and EBRO E9.JH DAY: various types of extrusion coaters are provided, including JH Day TFA-3 and JH Day TFA-5.XG Sciences: various types of extrusion coaters are provided, including XG Sciences XGE-200 and XG Sciences XGE-500.

When the gasket adopted by the existing coating machine is used, the gasket is firstly placed between the upper die head and the lower die head, is aligned to the bolt hole and is fixed on the die head through the positioning bolt. Slurry enters the die cavity through the die feed port 2 (typically the die opens a single cavity feed port 2 in the middle), and the size of the pole piece coating width is determined by the size of the shim opening. The slurry is fed into the die head after being pressurized by the screw pump, and is sprayed onto the aluminum foil through the position of the hollow opening of the gasket.

The faster the coating speed, the greater the pump speed and the greater the pressure within the chamber will be. The slurry belongs to fluid, and the higher the fluidity is, the lower the transverse surface density and the longitudinal surface density are, the less stable is.

If the surface density of the coated pole piece is unstable, the problems of lithium precipitation, unstable capacity, difficult module assembly and the like of the battery can be caused, so that the battery can not be delivered.

Especially when the flow rate is large, the slurry input by the feeding port 2 directly enters the accommodating area of the slurry in the gasket, and the slurry does not reach a stable state in the accommodating area due to the too high flow rate, and is directly sprayed out through the front opening of the gasket, so that the problem of unstable surface density of the coated pole piece is caused.

To solve the above-described problems, in the present embodiment, the coated gasket 1 is provided to include two major parts: a gasket body 11 and a spacer rib 12.

The gasket body 11 and the spacer protruding strips 12 have the same thickness. The spacer convex strips 12 are connected with the gasket body 11.

The gasket body 11 includes a transverse main plate 111 disposed transversely, and vertical risers 112 disposed at two ends of the transverse main plate 111.

The number of vertical risers 112 is 2, and the vertical risers 112 are connected to two ends of the transverse main board 111 and are perpendicular to the transverse main board 111, and the extending directions of the two vertical risers 112 are the same and parallel.

The transverse main plate 111 and the 2 vertical plates 112 are positioned on the same plane, and have equal thickness, thus forming the whole gasket body 11.

The transverse main plate 111 and the vertical riser plate 112 are surrounded to form a half-open collecting tank 113. The transverse main board 111 and the two vertical risers 112 form a structure, the front end of the transverse main board is a front opening formed by the two vertical risers 112, and the middle part of the transverse main board is a surrounding collecting tank 113 for collecting the input slurry. The feed port 2 is connected to the upper die and/or the lower die, and slurry is fed from the rear end of the lateral main plate 111 through the feed port 2 and can enter the collecting tank 113.

The front opening of the applicator pad 1 is also commonly referred to as a "front groove" or a "front slit". The front opening is an opening designed at the front end of the coating pad 1, and is generally used for the entry and exit of the coating liquid. During the coating process, the coating liquid flows out from the front opening to achieve uniform coating.

The spacer ribs 12 are in a strip-like structure, and the spacer ribs 12 are connected to the gasket body 11 and provided in the collecting groove 113.

The barrier ribs 12 correspond to the feed inlets 2 of the die head, and the length of the barrier ribs 12 is smaller than the length of the vertical riser 112.

After entering the collection tank 113, the slurry can flow back through the barrier of the barrier rib 12 in the area where the barrier rib 12 is located, and can flow and overflow in the area where the barrier rib 12 is located until the entire collection tank 113 is filled.

In this embodiment, the baffle convex strips 12 with the length smaller than that of the vertical riser 112 are arranged in the collecting tank 113, so that the slurry input by the feed inlet 2 flows to other areas after being baffle through the baffle convex strips 12 in the collecting tank 113 before being sprayed out to the front opening of the gasket, the stability of the internal pressure of the collecting tank 113 is ensured, the stability of the coating surface density is further ensured, and the problems that the fluid slurry is directly sprayed out from the front opening, the internal pressure of the cavity of the collecting tank 113 is not easy to stabilize, and the surface density is not easy to reach stability are avoided.

Further, at least 2 barrier ribs 12 arranged in parallel are provided in the coating pad 1.

The spacer ribs 12 are parallel to the vertical risers 112 and are also connected vertically to the gasket body 11.

The number of the baffle convex strips 12 is at least two, and the baffle convex strips are connected on the gasket body 11 in parallel.

Further, the coating gasket 1 corresponds to a feed inlet 2 in the die head which is installed and connected; wherein, on the transverse main board 111 of the coating gasket 1, one baffle protruding strip 12 is respectively arranged at two ends of the corresponding position of the feeding hole 2.

The feed ports 2 are correspondingly connected to the dies and correspond to the transverse main plates 111 of the coated gasket 1.

Two ends of the horizontal main plate 111 are respectively provided with a baffle convex strip 12 at the corresponding position of the feeding hole 2. That is, two baffle ribs 12 are required to be provided at the corresponding positions of each of the feed inlets 2, and provided at both ends thereof to constitute a specific slurry stabilizing region. If there are two inlets 2 located closer together, it is possible to share the middle barrier rib 12.

For example, the following arrangement is possible:

1. referring to fig. 1, there are 1 feed inlet 2: a baffle convex strip 12A, a feed inlet 2 and a baffle convex strip 12B;

2. 2 feed inlets 2, the distance is farther: barrier ribs 12A, feed ports 21, barrier ribs 12B, barrier ribs 12C, feed ports 22, barrier ribs 12D;

3. referring to fig. 2, the number of the feed inlets 2 is 2, and the distance is closer: the barrier ribs 12A, the feed inlet 21, the barrier ribs 12B, the feed inlet 22, and the barrier ribs 12C.

Further, referring to fig. 3, the collecting tank 113 includes a separation zone 1131, and an overflow zone 1132 outside the separation zone 1131;

the separation area 1131 is an area surrounded by two adjacent separation convex strips 12 as side edges, the transverse main board 111 as a bottom boundary, and parallel lines at the end heads of the two separation convex strips 12 as top boundaries;

the overflow area 1132 is an area surrounded by the vertical risers 112 on both sides and outside the separation area 1131 from the bottom boundary of the transverse main board 111 to the opening of the coating gasket 1, and the slurry entering from the feeding port 2 can overflow to the overflow area 1132 after entering the separation area 1131.

The collecting tank 113 includes the separation region 1131 and the overflow region 1132, wherein the separation region 1131 is the outside of the overflow region 1132.

Further, referring to the distance indicia of fig. 1, the length of the spacer ribs 12 is no greater than one-half the length of the vertical riser 112.

The length of the spacer protruding strip 12 corresponds to the following relationship:

L≤H×(1/2)；

wherein, the length of the baffle convex strip 12 is L, and the length of the vertical riser 112 is H.

The width of the baffle ribs 12 is not more than one eighth of the distance between the inner sides of the two vertical risers 112 and more than one tenth of the distance between the inner sides of the two vertical risers 112

The width of the barrier ribs 12 corresponds to the following relationship:

A×(1/8)≥D＞A×(1/10)；

wherein, the width of the baffle convex strip 12 is D, and the distance between the inner sides of the two vertical risers 112 is A.

Only when the length of the barrier rib 12 is small enough to be one fifth or less of the length of the vertical riser 112, the slurry in the separation zone 1131 overflows into the overflow zone 1132, and a stable state can be better achieved.

Further, referring to fig. 4, the spacer protruding strip 12 includes a spacer body 121 connected to the transverse main board 111, and a spacer head 122 disposed at an end of the spacer body 121 away from the transverse main board 111;

the spacer head 122 is arc-shaped.

The above-mentioned spacer rib 12 includes two parts, i.e., a spacer body 121 at the rear end and a spacer head 122 at the front end, and the spacer body 121 is connected to the spacer head 122.

The baffle head 122 has an arc structure, so that slurry in the separation zone 1131 can overflow into the overflow zone 1132 more smoothly and stably.

Further, referring to fig. 5, two lateral sides of the spacer body 121 of the spacer protruding strip 12 are respectively provided with an arc-shaped slurry groove 1211 extending along the length direction of the spacer body 121.

The two sides of the barrier rib 12 can be contacted with the slurry, i.e. the two lateral sides.

Each of the lateral sides is provided with a slurry groove 1211, and the length of the slurry groove 1211 may be the same as or similar to the length of the spacer body 121, and the extending direction thereof is the same as the length direction of the spacer body 121.

By arranging the slurry groove 1211, the slurry in the separation zone 1131 can better overflow to the overflow zone 1132, the slurry in the overflow zone 1132 can continuously flow under the guidance of the arc-shaped groove after contacting the slurry groove 1211, and the slurry can not stay, adhere and generate dead volume, so that the fluidity and the stability of the slurry are further improved.

For the baffle head 122, in order to further improve the fluidity of the slurry, two embodiments are provided in this example, as follows:

(1) Referring to fig. 6, in one embodiment, the spacer head 122 includes a circular arc portion 1221 at a front end, and a connection groove 1222 having both sides connected to the slurry groove 1211;

the connection slots 1222 are connected to the slurry slots 1211 of the corresponding sides and are in the same line so that the slurry can flow from the connection slots 1222 along the slurry slots 1211 toward the spacer head 122.

The spacer head 122 includes a circular arc 1221 and a side attachment slot 1222.

The arcuate portion 1221 is a distal end of the spacer head 122. The connection slots 1222 are provided at both ends of the spacer 122, corresponding to and connected to the slurry slots 1211 at the rear end, respectively.

Two connecting grooves 1222 on the side surface of the arc part 1221 respectively correspond to one slurry groove 1211, and can be in the same straight line corresponding to the slurry groove 1211, and on each side edge, the slurry groove 1211 at the rear end and the connecting groove 1222 at the front end form a whole groove body, so that slurry can flow along the slurry groove 1211 after entering through the feeding hole 2, and can not be blocked by continuing to flow through the connecting groove 1222, and further overflows through the arc part 1221 at the front end, and reaches an overflow area 1132, the overflow smoothness is further improved, the fluidity is improved, and the slurry can be stabilized.

(2) Referring to fig. 7, in another embodiment, the spacer head 122 includes a head body 1223 and an arcuate slot 1224 provided on the head body 1223;

the arc-shaped grooves 1224 are formed around the head body 1223 in a semicircular arc shape at the front end of the baffle head 122, and are connected to the slurry grooves 1211 at both sides, respectively.

The arc-shaped groove 1224 is disposed on the head body 1223, surrounds the head body 1223, and is respectively communicated with the slurry grooves 1211 on two sides, so that after the slurry enters the separation zone 1131 from the feed inlet 2, the slurry continuously overflows upwards under the drainage of the connecting groove 1222, and enters the arc-shaped groove 1224, and continuously flows under the drainage of the arc-shaped groove 1224 until entering the overflow zone 1132, thereby further improving the fluidity of the slurry, reducing the dead volume, and enabling the slurry to reach stability smoothly.

Further, referring to fig. 8, the present embodiment also provides a slurry coating apparatus 100 including:

an upper die 3, a lower die 4 and a feed inlet 2, and a coated gasket 1 as described above;

wherein the upper end die head 3 and the lower end die head 4 can be correspondingly combined; the coated gasket 1 can be placed between the upper end die 3 and the lower end die 4 when the upper end die 3 and the lower end die 4 are correspondingly combined;

the slurry coating device 100 includes at least one feed inlet 2, and in the coating pad 1, two ends of each feed inlet 2 corresponding to the position are respectively provided with one baffle protruding strip 12.

The slurry coating apparatus 100 includes two dies, namely, an upper die 3 and a lower die 4, and is connected to the inlet 2.

When combined, the upper end die 3 and the lower end die 4 can be correspondingly combined, and the coated gasket 1 is installed therebetween.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. A coated gasket comprising:

the gasket comprises a gasket body and a baffle convex strip arranged on the gasket body;

the gasket body comprises a transverse main plate and vertical plates arranged at two ends of the transverse main plate;

the transverse main plate and the vertical plate are surrounded to form a collecting tank;

the baffle convex strips are connected with the gasket body, are arranged in the collecting groove and correspond to the feeding holes of the die head, and the length of the baffle convex strips is smaller than that of the vertical plates.

2. The coated gasket of claim 1 wherein at least 2 of said barrier ribs are disposed in parallel.

3. The coated gasket of claim 2 wherein said coated gasket corresponds to a feed port in a die to which it is attached; wherein,

and one baffle convex strip is respectively arranged at two ends of the corresponding position of the feeding hole on the transverse main plate of the coating gasket.

4. The coated gasket of claim 3,

the collecting tank comprises a separation area and an overflow area outside the separation area;

the separation area is an area formed by taking two adjacent separation convex strips as side edges, taking the transverse main board as a bottom boundary and taking parallel lines of the end heads of the two separation convex strips as a top boundary;

the overflow area is an area which is surrounded by the side edges of the vertical plates from the transverse main plate to the opening of the coating gasket and is outside the separation area, and the slurry entering from the feeding hole can overflow to the overflow area after entering the separation area.

5. The coated gasket of claim 1 wherein,

the length of the baffle convex strips is not more than one half of the length of the vertical riser;

the width of the baffle convex strips is not more than one eighth of the distance between the inner sides of the two vertical risers and is more than one tenth of the distance between the inner sides of the two vertical risers.

6. The coated gasket of claim 1 wherein,

the baffle convex strips comprise baffle bodies connected with the transverse main boards and baffle heads arranged at the ends of the baffle bodies far away from the transverse main boards;

the baffle head is arc-shaped.

7. The coated gasket of claim 6 wherein,

the transverse two sides of the baffle body of the baffle convex strip are respectively provided with an arc-shaped slurry groove extending along the length direction of the baffle body.

8. The coated gasket of claim 7 wherein said spacer head includes a rounded portion at a front end and a connecting slot having two sides connected to said slurry slot;

the connecting grooves are connected with the slurry grooves on the corresponding side surfaces and are in the same straight line, so that the slurry can flow from the slurry grooves to the connecting grooves of the baffle head.

9. The applicator pad of claim 7, wherein the spacer head comprises a head body and an arcuate slot provided in the head body;

the arc-shaped groove surrounds the head body, is arranged in a semicircular arc shape at the front end of the baffle head, and is respectively connected with the slurry grooves at two sides.

10. A slurry coating apparatus, comprising:

an upper die, a lower die and a feed inlet, a coated gasket according to any one of claims 1-9;

wherein the upper end die head and the lower end die head can be correspondingly combined; the coating gasket can be placed between the upper end die and the lower end die when the upper end die and the lower end die are correspondingly combined;

the slurry coating device comprises at least one feeding hole, and in the coating gasket, two ends of each feeding hole, which correspond to the positions, are respectively provided with one baffle convex strip.