CN218078780U

CN218078780U - Split type coating gasket and coating device

Info

Publication number: CN218078780U
Application number: CN202222537775.5U
Authority: CN
Inventors: 张庆; 白方磊; 吴文兵
Original assignee: Fuyang Haina Technology Co ltd
Current assignee: Fuyang Haina Technology Co ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2022-12-20
Anticipated expiration: 2032-09-23

Abstract

The embodiment of the application provides a split type coating gasket and a coating device, and relates to the technical field of secondary battery production. The split type coating gasket comprises a gasket main body, wherein the gasket main body is provided with at least one U-shaped plate with an opening at the top end, each top end of each U-shaped plate is sequentially detachably connected with a width adjusting plate and a chamfer angle adjusting plate towards the inner side of the opening, and a chamfer angle is arranged at the position of the chamfer angle adjusting plate towards the inner side of the opening; through the type of buckling end plate that can the gomphosis together and the type of buckling breach realize detachable the connection between U template and the width regulating plate, through the type of buckling end plate that can the gomphosis together and the type of buckling breach realize detachable the connection between width regulating plate and the chamfer regulating plate. Split type coating gasket and coating device can change the combination to the regulating plate in the split type gasket to obtain the gasket of different chamfers and coating width, with the coating demand that adapts to different characteristic thick liquids, swell problem when solving the coating.

Description

Split type coating gasket and coating device

Technical Field

The application relates to the technical field of secondary battery production, in particular to a split type coating gasket and a coating device.

Background

Pole piece coating is a key process in the production process of secondary batteries (lithium/sodium ion batteries and the like), and the subsequent use performance, safety and the like of products are directly influenced by the quality of the pole piece coating effect. Extrusion coating is a coating mode widely adopted in the industry at present, and specifically comprises the steps of enabling slurry to enter a cavity inside a die head from a feeding port to form stable pressure, extruding the slurry from a slit outlet of the die head to coat the slurry on a foil, and baking a wet coating formed by coating through an oven to obtain a solvent for drying. The coating mode can accurately control the load of the coating surface by adjusting the slurry feeding speed and the coating speed. When coating, under the influence of slurry with different flow characteristics, a half-moon-shaped coating is formed at the starting point, the ending point and two side edges of the coating, the thickness of the coating is thicker than that of a normal area, and the phenomenon of the thickness increase is called as 'edge bulging'. In particular, the thickness of the two side edges of the coating increases, and the edge thickness increases during the winding process, so that the edge of the roll is cracked.

The current solution of edge bulging is to adjust the chamfering proportion and the coating width of a coating gasket so as to improve the distribution of coating fluid, and in the actual production process, different slurry viscosities and flowability are different, and the requirements on the chamfering and the width of the coating gasket are inconsistent. However, the prior art adopts an integrated gasket, and a plurality of gaskets with different chamfers and coating widths need to be prepared to meet the flow characteristics of different slurries so as to meet the requirements of coating different slurries. However, the gasket has high precision requirement, long manufacturing period, high cost for customizing gaskets of different specifications and long waiting time.

SUMMERY OF THE UTILITY MODEL

An object of this application embodiment is to provide a split type coating gasket and coating device, can change the combination to the regulating plate in the split type gasket to obtain the gasket of different chamfers and coating width, with the coating demand that adapts to different characteristic thick liquids, the swell problem when solving the coating.

In a first aspect, an embodiment of the application provides a split type coating gasket, which comprises a gasket main body, wherein the gasket main body is provided with at least one U-shaped plate with an opening at the top end, each top end of each U-shaped plate is sequentially detachably connected with a width adjusting plate and a chamfer adjusting plate towards the inner side of the opening, and a chamfer is arranged at the position of the chamfer adjusting plate towards the inner side of the opening;

the U-shaped plate and the width adjusting plate are detachably connected through the bending type end plate and the bending type notch which can be embedded together, and the width adjusting plate and the chamfer adjusting plate are detachably connected through the bending type end plate and the bending type notch which can be embedded together.

In the above implementation, the shape of the extrusion opening of the shim (opening width and chamfer) affects the velocity distribution of the fluid in the die head, and ultimately the morphology of the coating, especially the chamfer of the coating edge. This application will be originally the gasket of integral type and divide into 3 parts, including the gasket main part, width regulating plate and chamfer regulating plate, inboard on U template top sets up a detachable width regulating plate and detachable chamfer regulating plate, realize not changing the gasket main part, only need to change width regulating plate and chamfer regulating plate according to the thick liquid characteristic and can optimize the gasket and extrude the mouth shape, can change thick liquid flow velocity direction and size, reduce the tension of marginal thick liquid, weaken or eliminate the thick limit phenomenon of coating, realize adjusting coating width size and improve the mesh on drum limit, thereby the cost is greatly saved, and the waiting time is shortened. Specifically, the width of the coating extrusion port is changed by replacing width adjusting plates with different sizes, so that the purpose of adjusting the width size of the slurry coating is achieved; the chamfering adjusting plate with different chamfers is replaced to meet the coating requirements of slurry with different flow characteristics, the thickness of the edge of the slurry coating is compensated, the tension of the slurry at the edge is reduced, the edge thickness of the coating is consistent with the thickness of the middle coating, and the problems of edge bulging and thinning caused by the fluid characteristics of the slurry in the coating process are solved.

Especially, through the type of buckling end plate and the type of buckling breach realization detachable connection that can inlay together between U template and the width regulating plate, through the type of buckling end plate and the type of buckling breach realization detachable connection that can inlay together between width regulating plate and the chamfer regulating plate, the gasket main part, the connection between width regulating plate and the chamfer regulating plate is more firm, can not be easily alternate after linking together, and the split of also being convenient for is changed moreover.

In a possible implementation mode, the connecting positions of the U-shaped plate and the width adjusting plate are respectively provided with a bending type end plate and a bending type notch, the connecting positions of the width adjusting plate and the chamfer adjusting plate are respectively provided with a bending type end plate and a bending type notch, and the bending type is an L-shaped type.

In the implementation process, the structural design of the L-shaped end plate and the L-shaped notch is simple, the U-shaped plate and the width adjusting plate can be achieved, the width adjusting plate and the chamfer adjusting plate are detachably connected, and the L-shaped end plate and the L-shaped notch are not easy to separate after being connected.

In a possible implementation, every top of every U template is provided with first type of buckling breach towards the inboard position of opening, the width regulating plate sets up respectively to first type of buckling end plate and second type of buckling end plate towards the opening outside and the inboard position of opening, the chamfer regulating plate is provided with second type of buckling breach and chamfer respectively towards the opening outside and the inboard position of opening, the first type of buckling end plate of width regulating plate can be in the same place with the first type of buckling breach gomphosis, the type of buckling end plate of second can be in the same place with the type of buckling breach gomphosis of second.

In a possible implementation manner, the first bending type notch is a first transverse notch facing the inner side of the opening and a first longitudinal notch extending from the first transverse notch in an upward bending manner.

In a possible implementation, the width regulating plate comprises a main body plate, a first transverse plate extending from the bottom end of the main body plate to the outside of the opening, a first longitudinal plate extending from the first transverse plate in an upward bending manner, a second transverse plate extending from the top end of the main body plate to the inside of the opening, a second longitudinal plate extending from the second transverse plate in a downward bending manner, a first bending type end plate consisting of the first transverse plate and the first longitudinal plate, and a second bending type end plate consisting of the second transverse plate and the second longitudinal plate.

In the implementation process, the width adjusting plate is used as a replaceable part, different width sizes can be manufactured, and the width adjusting plates with the same structures of the first bending type end plate and the second bending type end plate are replaced to adapt to coating widths with different sizes, so that the production cost can be reduced.

In a possible implementation manner, the second bending type notch is a second transverse notch facing the outside of the opening and a second longitudinal notch extending from the second transverse notch in a downward bending manner.

In the above-mentioned realization in-process, at the coating process, according to the thick liquids characteristic of difference, the opening size of the chamfer of extruding the mouth also needs to change correspondingly, only needs the chamfer regulating plate that the chamfer of preparation equidimension not, the type breach is the same to be buckled to the second to replace, just can change the opening size of chamfer, can reduce the tension of marginal thick liquids, weakens or eliminates coating thick limit phenomenon.

In a possible implementation manner, the gasket main body comprises a main board, two supporting plates are respectively connected to two ends and the middle of the main board, and the main board and all the supporting plates jointly form two U-shaped plates.

In the above-mentioned realization process, extrude mouthful design and be two, two width and the chamfer of extruding the mouth in addition all can be adjusted, satisfy complicated pole piece coating demand.

In one possible implementation, the thickness of all the gasket main bodies, the width adjusting plates and the chamfer adjusting plates are the same;

and/or, the gasket main body is provided with a mounting hole.

In the implementation process, all the gasket main bodies, the width adjusting plates and the chamfer angle adjusting plates are the same in thickness, so that the pressure stability and the environmental sealing of the cavity in the die head are facilitated, and the stability of extrusion coating work is improved. The mounting holes serve to secure the shim body between the upper and lower dies.

In a possible realization mode, the chamfer is positioned at the top angle of the chamfer regulating plate facing the inner side of the opening, and the chamfer is a fillet.

In the implementation process, the distance between the coating and the chamfer adjusting plate is gradually increased due to the arrangement of the fillet, the friction force is gradually reduced and disappears, and when the coating leaves the chamfer adjusting plate, the edge of the coating cannot be bulged due to the overlarge change degree of the friction force.

In a second aspect, embodiments of the present application provide a coating apparatus, which includes an upper die and a lower die, and the split coating shim provided in the first aspect, which is disposed between the upper die and the lower die.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a split coating pad provided in an embodiment of the present application;

FIG. 2 is a schematic structural view of the gasket body of FIG. 1;

FIG. 3 is a schematic view of the width adjustment plate of FIG. 1;

fig. 4 is a schematic structural view of the chamfer adjusting plate of fig. 1.

Icon: 110-a gasket body; 111-a main board; 112-a plate; 113-a first bending notch; 114-mounting holes; 120-width adjustment plate; 121-a first bending type end plate; 122-a second bending type end plate; 130-chamfer adjusting plate; 131-a second bending type notch; 132-chamfering.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally found in use of products of the application, and are used only for convenience in describing the present application and for simplification of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

Referring to fig. 1, the split coating gasket provided in this embodiment includes a gasket main body 110, the gasket main body 110 has at least one U-shaped plate with an open top end, each top end of each U-shaped plate is detachably connected to a width adjustment plate 120 and a chamfer adjustment plate 130 in sequence toward the inside of the open top end, a chamfer 132 is disposed on the chamfer adjustment plate 130 toward the inside of the open top end, and an extrusion opening is formed in an area between the two chamfer adjustment plates 130 connected to the top end of each U-shaped plate. The U-shaped plate and the width adjusting plate 120 are detachably connected through the bending type end plate and the bending type gap which can be embedded together, and the width adjusting plate 120 and the chamfer adjusting plate 130 are detachably connected through the bending type end plate and the bending type gap which can be embedded together.

Referring to fig. 2, in the present embodiment, the gasket main body 110 includes a main plate 111 disposed horizontally, two ends and a middle of the main plate 111 are respectively connected to a support plate 112 disposed vertically, the main plate 111 and all the support plates 112 together form two U-shaped plates, a width adjustment plate 120 and a chamfer adjustment plate 130 are connected to positions of top ends of the support plates 112 disposed at the two ends facing the inner sides of openings of the respective U-shaped plates, and a width adjustment plate 120 and a chamfer adjustment plate 130 are connected to positions of top ends of the support plates 112 disposed at the middle facing the inner sides of the openings of the two U-shaped plates. All gasket main part 110, width regulating plate 120 and chamfer regulating plate 130 in this application are the arrangement form that tiles, and all gasket main part 110, width regulating plate 120 and chamfer regulating plate 130's thickness is the same. The gasket body 110 is provided with a mounting hole 114. In other embodiments, the gasket body 110 may be only one U-shaped plate, and more support plates 112 may be connected in the same manner to form a greater number of U-shaped plates.

It should be noted that, in the embodiments of the present application, "the inside of the opening" and "the outside of the opening" are both described with reference to the opening of the U-shaped plate.

In order to realize the detachable connection, the connection position between the U-shaped plate and the width adjusting plate 120 is respectively provided with a bending-type end plate and a bending-type gap, the connection position between the width adjusting plate 120 and the chamfer adjusting plate 130 is respectively provided with a bending-type end plate and a bending-type gap, and the bending type is an L-type. The top end of the U-shaped plate is provided with a bending type end plate or a bending type gap which is used for being connected with the width adjusting plate 120 at the position facing the inner side of the opening, and the width adjusting plate 120 is provided with a corresponding bending type gap or a corresponding bending type end plate which is embedded and matched at the position facing the outer side of the opening; the width adjustment plate 120 is provided with a bending type end plate or a bending type notch for connecting with the chamfer adjustment plate 130 at a position facing the inner side of the opening, and the chamfer adjustment plate 130 is provided with a corresponding jogged and matched bending type notch or bending type end plate at a position facing the outer side of the opening.

Specifically, a first bending notch 113 is arranged at a position, facing the inner side of the opening, of each top end of each U-shaped plate, and the first bending notch 113 is a first transverse notch facing the inner side of the opening and a first longitudinal notch extending from the first transverse notch in an upward bending manner.

Referring to fig. 3, the position of the width adjustment plate 120 facing the opening outer side and the opening inner side is respectively provided with a first bending type end plate 121 and a second bending type end plate 122, the width adjustment plate 120 includes a main body plate, a first transverse plate extending from the bottom end of the main body plate to the opening outer side, a first longitudinal plate extending from the first transverse plate by bending upwards, a second transverse plate extending from the top end of the main body plate to the opening inner side, a second longitudinal plate extending from the second transverse plate by bending downwards, the first bending type end plate 121 is formed by the first transverse plate and the first longitudinal plate, and the second bending type end plate 122 is formed by the second transverse plate and the second longitudinal plate.

Referring to fig. 4, the positions of the chamfer adjusting plate 130 facing the opening outer side and the opening inner side are respectively provided with a second bending type notch 131 and a chamfer 132, the second bending type notch 131 is a second transverse notch facing the opening outer side and a second longitudinal notch bent and extended downward from the second transverse notch, the chamfer 132 is located at the top angle position of the chamfer adjusting plate 130 facing the opening inner side, and the chamfer 132 is a fillet.

In this embodiment, the first bending type end plate 121 of the width adjustment plate 120 can be embedded with the first bending type notch 113, and the second bending type end plate 122 can be embedded with the second bending type notch 131. Specifically, the first transverse plate is embedded into the first transverse notch, and the first longitudinal plate is embedded into the first longitudinal notch; the second transverse plate is embedded into the second transverse notch, and the second longitudinal plate is embedded into the second longitudinal notch.

In other embodiments, each top end of each U-shaped plate is provided with a bent end plate facing the inner side of the opening; the positions of the width adjusting plate 120 facing the outside of the opening and the inside of the opening are respectively provided with bending notches; the chamfer adjusting plate 130 is provided with a bending type end plate toward the opening outside.

The embodiment of the application also provides a coating device, which comprises an upper die head, a lower die head and the split type coating gasket, wherein the lower die head is provided with a film feeding cavity, the film feeding cavity is communicated with the film material pipeline, the upper die head is fixed above the lower die head during operation, and the split type coating gasket is fixed between the upper die head and the lower die head.

In the process of manufacturing the battery, the width of the coating is different, and the thickness of the coating edge is changed correspondingly according to the width of the coating. Coating unit is at the during operation, and the coating thick liquids that advance the membrane intracavity are extrudeed from extruding the mouth and are formed the coating, and width regulating plate 120 and chamfer regulating plate 130 have been add on gasket main part 110 to this application, as long as make a standard gasket main part 110, then go to replace width regulating plate 120 and chamfer regulating plate 130 according to the demand of difference and satisfy different coating demands. The width adjusting plate 120 corresponding to the width is selected according to different coating widths, the chamfer adjusting plate 130 corresponding to the chamfer 132 is selected according to different requirements of the chamfer 132, different angles of the chamfer 132 play a very critical role in slurry shunting so as to change the edge thinning capability, so that different coating requirements of slurries with different characteristics can be met, the replacement operation is simple, the workload is reduced, and the replacement cost can be saved.

To sum up, the combination can be changed to the regulating plate in the split type gasket to split type coating gasket and coating unit of this application embodiment to obtain the gasket of different chamfers and coating width, with the coating demand that adapts to different characteristic thick liquids, the swell problem when solving the coating.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A split type coating gasket is characterized by comprising a gasket main body, wherein the gasket main body is provided with at least one U-shaped plate with an opening at the top end, each top end of each U-shaped plate is sequentially detachably connected with a width adjusting plate and a chamfer adjusting plate towards the inner side of the opening, and a chamfer is arranged at the position of each chamfer adjusting plate towards the inner side of the opening;

u template with realize detachable the connection through the type of buckling end plate and the type of buckling breach that can the gomphosis be in the same place between the width regulation board, the width regulation board with realize detachable the connection through the type of buckling end plate and the type of buckling breach that can the gomphosis be in the same place between the chamfer regulation board.

2. The split type coating gasket of claim 1, wherein the connecting positions of the U-shaped plate and the width adjusting plate are respectively provided with a bending type end plate and a bending type gap, the connecting positions of the width adjusting plate and the chamfer adjusting plate are respectively provided with a bending type end plate and a bending type gap, and the bending type is L-shaped.

3. The split type coating gasket of claim 1, wherein a first bending type notch is formed at a position facing the inside of the opening at each top end of each U-shaped plate, a first bending type end plate and a second bending type end plate are respectively formed at positions facing the outside of the opening and the inside of the opening at each width adjusting plate, a second bending type notch and a chamfer are respectively formed at positions facing the outside of the opening and the inside of the opening at each chamfer adjusting plate, the first bending type end plate of each width adjusting plate can be embedded with the first bending type notch, and the second bending type end plate can be embedded with the second bending type notch.

4. The split coating shim of claim 3, wherein the first bending notch is a first transverse notch facing the inside of the opening and a first longitudinal notch extending upward from the first transverse notch.

5. The split type coating gasket of claim 3, wherein the width adjustment plate comprises a main body plate, a first transverse plate extending from the bottom end of the main body plate to the outside of the opening, a first longitudinal plate extending from the first transverse plate by bending upward, a second transverse plate extending from the top end of the main body plate to the inside of the opening, and a second longitudinal plate extending from the second transverse plate by bending downward, wherein the first transverse plate and the first longitudinal plate form a first bending type end plate, and the second transverse plate and the second longitudinal plate form a second bending type end plate.

6. The split coating shim of claim 3, wherein the second bending type notch is a second transverse notch facing the outside of the opening and a second longitudinal notch extending from the second transverse notch in a downward bending manner.

7. The split coated gasket of claim 1, wherein the gasket body comprises a main plate, two support plates are respectively connected to two ends and the middle of the main plate, and the main plate and all the support plates jointly form two U-shaped plates.

8. The split coating shim of claim 1, wherein all of the shim body, the width adjustment plate, and the chamfer adjustment plate have the same thickness;

and/or the gasket main body is provided with a mounting hole.

9. The split coating shim of claim 1, wherein the chamfer is at a top corner of the chamfer-adjusting plate facing inward of the opening, the chamfer being a rounded corner.

10. A coating apparatus comprising an upper die and a lower die, and the split coating shim of any one of claims 1 to 9 disposed between the upper die and the lower die.