CN209985693U

CN209985693U - Extrusion coating gasket

Info

Publication number: CN209985693U
Application number: CN201920287287.9U
Authority: CN
Inventors: 何文杰; 顾朝阳; 王秀; 丁恒超; 张芳妍; 饶睦敏
Original assignee: Zhaoqing Aoyou Power Battery Co ltd
Current assignee: Huzhou Xinyuan Battery System Technology Co ltd
Priority date: 2019-03-06
Filing date: 2019-03-06
Publication date: 2020-01-24
Anticipated expiration: 2029-03-06

Abstract

The utility model discloses an extrusion coating gasket, which comprises a first main body and a pair of second main bodies formed by extending from two ends of the first main body, wherein a diversion trench is formed between the pair of second main bodies; each second main body comprises a drainage surface opposite to the other second main body, one end of each drainage surface, which is far away from the first main body, is protruded to form a guide protrusion, and an outlet of the flow guide groove is formed between the two guide protrusions; the guide bulge comprises a first guide surface and a second guide surface, wherein the first guide surface is inclined relative to the drainage surface, the second guide surface is connected with the drainage surface and the first guide surface, and the second guide surface is arc-shaped and is tangent to the drainage surface. The beneficial effects of the utility model reside in that: reduce the speed that thick liquids carried out the flow along the second main part through protruding first spigot surface of direction and second spigot surface to reduce the coating at the thick liquids volume at pole piece edge, and then reduce the thickness at pole piece edge, effectively avoid the pole piece phenomenon of bulging limit to appear.

Description

Extrusion coating gasket

[ technical field ] A method for producing a semiconductor device

The utility model relates to an extrusion coating machine technical field especially relates to an extrusion coating gasket.

[ background of the invention ]

The lithium ion battery has the outstanding advantages of high voltage, small volume, light weight, high specific energy, no memory effect, no pollution, small self-discharge, long service life and the like, and has been developed rapidly in recent decades since the development of the 20 th century and the 90 th era is successful. In the production process of the lithium ion battery, the foil needs to be subjected to a coating process. The coating die directly determines the weight, thickness, density, void and void distribution of the slurry on the foil, and how well these parameters are consistent directly determines the life and performance of the lithium battery. At present, the feeding mode of the traditional extrusion coating machine die head is that the materials are fed by a screw pump and then pass through a gap valve system, different valves are respectively opened during coating and gap, and the slurry enters a buffer cavity from a feeding pipe at the bottom or the back of the die head. However, the edge of the die head of the traditional extrusion coating machine is not provided with a dressing buffer area, and the slurry shrinks in the drying process to generate edge bulging, so that the uniformity of the coating surface and the quality of a pole piece are seriously influenced, frequent shutdown and machine adjustment are caused, a large amount of scrap is caused, and the production efficiency is reduced.

Accordingly, there is a need to provide an extrusion coated gasket that overcomes the above-mentioned deficiencies.

[ Utility model ] content

The utility model aims at providing an extrusion coating gasket for on extrusion coating machine aims at avoiding the pole piece to appear bulging limit phenomenon through the thick liquids volume that reduces the pole piece edge.

In order to achieve the above object, the present invention provides an extrusion coating gasket, including a first main body and a pair of second main bodies extending from two ends of the first main body, wherein a diversion trench is formed between the pair of second main bodies; each second body comprises a drainage surface opposite to the other second body, one end of each drainage surface, which is far away from the first body, is convexly provided with a guide bulge, and an outlet of the flow guide groove is formed between the two guide bulges; the guide bulge comprises a first guide surface and a second guide surface, wherein the first guide surface is inclined relative to the drainage surface, the second guide surface is connected with the drainage surface and the first guide surface, and the second guide surface is arc-shaped and is tangent to the drainage surface.

In a preferred embodiment, the ends of the two first guide surfaces facing away from the second guide surface are inclined in a direction toward each other.

In a preferred embodiment, the first body is rectangular and flat and includes a pair of parallel long side surfaces, the second body includes a first end surface away from the first body and parallel to the long side surfaces, and the two drainage surfaces are perpendicular to the long side surfaces and symmetrically arranged along a center line of the long side surfaces.

In a preferred embodiment, the first end face is arranged at an angle of 60 ° to 85 ° to the first guide surface.

In a preferred embodiment, a junction between the first end surface and the first guide surface is provided with a rounded corner.

In a preferred embodiment, the radius of the rounded corners is 1-3 mm.

In a preferred embodiment, a middle portion of the first body extends to form a third body which is located in the diversion trench and has a rectangular shape.

In a preferred embodiment, the third body comprises the second end face remote from the first body, and the second end face is flush with the first end face of the second body.

In a preferred embodiment, the first body and the second body are respectively provided with a plurality of positioning holes arranged at intervals.

The utility model provides an extrusion coating gasket reduces the speed that thick liquids carried out the flow along the second main part through bellied first spigot surface of direction and second spigot surface to reduce the coating at the thick liquids volume at pole piece edge, and then reduce the thickness at pole piece edge, effectively avoid the pole piece phenomenon of bulging limit to appear.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

[ description of the drawings ]

Fig. 1 is a perspective view of the extrusion coating gasket provided by the present invention installed between an upper die head and a lower die head;

FIG. 2 is a perspective view of the extrusion coated gasket of FIG. 1 attached to a lower die;

FIG. 3 is a front view of the extrusion coated gasket of FIG. 1;

fig. 4 is an enlarged view of the area a shown in fig. 3.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration only and not by way of limitation.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1 and 2, the present invention provides an extrusion coating gasket 100 for coating production of a pole piece, i.e. coating slurry on a pole piece foil through the extrusion coating gasket 100, mainly solving the problem of edge bulging at the edge of the pole piece.

The embodiment of the utility model provides an in, extrusion coating gasket 100 is installed between last die head 200 and lower die head 300, and lower die head 300 has feed inlet 3001 and communicates with feed inlet 3001 and is used for acceping the chamber 3002 of acceping of thick liquids, and extrusion coating gasket 100 then forms and accepts the guiding gutter 13 of chamber 3002 intercommunication for thick liquids loop through feed inlet 3001, accept chamber 3002 and guiding gutter 13 and scribble again on the pole piece foil material. It will be appreciated that extrusion coated gasket 100 is coated with channels 13 to control the amount of slurry applied to the pole piece foil.

Specifically, referring to fig. 3, the extrusion coating gasket 100 includes a first body 11 and a pair of second bodies 12 extending from two ends of the first body 11 and disposed in parallel, a diversion trench 13 is formed between the pair of second bodies 12, and a plurality of positioning holes 101 disposed at intervals are respectively formed on the first body 11 and the second bodies 12, and the extrusion coating gasket 100 is fixed between the upper die 200 and the lower die 300 through the positioning holes 101. Preferably, the first body 11 has a rectangular flat plate shape, and a pair of first bodies 11 are disposed in parallel and vertically connected to both ends of the first body 11, so that the processing and manufacturing can be facilitated.

Each second body 12 comprises a flow guiding surface 121 opposite to the other second body 12, one end of each flow guiding surface 121 far away from the first body 11 is protruded to form a guiding protrusion 1211, and an outlet 131 of the flow guiding groove 13 is formed between the two guiding protrusions 1211 for slurry to flow out. In this embodiment, the guide protrusion 1211 may increase a contact area between the second body 12 and the slurry, so that a resistance of the slurry at the edge of the guiding groove 13 flowing out of the guiding groove 13 along a side of the second body 12 close to the guiding groove 13 is increased, so as to reduce a speed of the slurry flowing out of the guiding groove 13, thereby reducing a slurry amount at the edge of the pole piece foil, further reducing a thickness of the pole piece edge, and improving a phenomenon of edge bulging of the pole piece.

Further, in one embodiment, the guide projection 1211 includes a first guide surface 1212 inclined opposite to the drainage surface 121 and a second guide surface 1213 connecting the drainage surface 121 and the first guide surface 1212, and the second guide surface 1213 is arc-shaped and tangent to the drainage surface 121. In this embodiment, the ends of the two first guide surfaces 1212 far from the second guide surface 1213 are inclined toward the direction close to each other, so that the width of the outlet 131 of the guiding groove 13 is gradually reduced along the flowing direction of the slurry, and the flow speed of the slurry at the edge of the guiding groove 13 flowing out of the guiding groove 13 along the first guide surface 1212 can be gradually reduced, thereby further reducing the amount of the slurry at the edge of the pole piece foil, and further improving the edge bulging phenomenon of the pole piece. In addition, the second guide surface 1213 is tangent to the drainage surface 121, so that the second guide surface 1213 can prevent the slurry from flowing in the guiding groove 13 and causing a dead zone, i.e. prevent a part of the slurry from being accumulated on the side of the guiding protrusion 1211 close to the first main body 11, thereby increasing the smoothness of the slurry flowing in the guiding groove, preventing the slurry from being deposited and piled up, and improving the coating effect of the pole piece.

Referring to fig. 4, in a further embodiment, the first body 11 includes a pair of parallel long side surfaces 102, the second body 12 includes a first end surface 122 far away from the first body 11 and parallel to the long side surfaces 102, such that the pair of first bodies 11 are disposed in parallel and perpendicularly connected to two ends of the first body 11, such that the two guiding surfaces 121 are perpendicular to the long side surfaces 102 and symmetrically disposed along a center line of the long side surfaces 102, and when one ends of the two first guiding surfaces 1212 far away from the second guiding surfaces 1213 are inclined toward each other, the first guiding surfaces 1212 and the first end surface 122 are disposed at an included angle, specifically, the included angle between the first guiding surfaces 1212 and the first end surface 122 is 60 ° -85 °. Preferably, the connecting portion of the first end surface 122 and the first guide surface 1212 is further provided with a fillet 1221, the fillet 1221 disperses the slurry before contacting the edge of the pole piece foil, so as to reduce the thickness of the pole piece edge, and further improve the edge bulging phenomenon of the pole piece, and preferably, the radius of the fillet 1221 is 1-3 mm.

Further, in one embodiment, a middle portion of the first body 11 extends to form a third body 14 located in the guiding groove 13 and having a rectangular shape, and the third body 14 includes a second end surface 141 far from the first body 11, and the second end surface 141 is flush with the first end surface 122 of the second body 12. In the present embodiment, the third body 14 divides the guiding groove 13 into two parts and forms a blank area on the pole piece foil, and then cuts the coated pole piece foil along the blank area to form two pole pieces, so that the production efficiency can be improved.

To sum up, the utility model discloses an extrusion coating gasket 100 reduces the speed that thick liquids flow along second main part 12 through the first spigot surface 1212 and the second spigot surface 1213 of the protruding 1211 of direction to reduce the coating at the thick liquids volume at pole piece edge, and then reduce the thickness at pole piece edge, effectively avoid the pole piece phenomenon of drum limit to appear.

The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims

1. The extrusion coating gasket is characterized by comprising a first main body and a pair of second main bodies formed by extending from two ends of the first main body, wherein a flow guide groove is formed between the pair of second main bodies; each second body comprises a drainage surface opposite to the other second body, one end of each drainage surface, which is far away from the first body, is convexly provided with a guide bulge, and an outlet of the flow guide groove is formed between the two guide bulges; the guide bulge comprises a first guide surface and a second guide surface, wherein the first guide surface is inclined relative to the drainage surface, the second guide surface is connected with the drainage surface and the first guide surface, and the second guide surface is arc-shaped and is tangent to the drainage surface.

2. The extrusion coated gasket of claim 1 wherein the ends of the two first guide surfaces distal from the second guide surface are inclined toward each other.

3. The extrusion coated gasket as set forth in claim 2 wherein said first body is generally rectangular and planar and includes a pair of parallel long side surfaces, said second body includes a first end surface remote from said first body and parallel to said long side surfaces, and both of said flow directing surfaces are perpendicular to said long side surfaces and are symmetrically disposed along a center line of said long side surfaces.

4. The extrusion coated gasket of claim 3 wherein said first end surface is disposed at an angle of between 60 ° and 85 ° to said first guide surface.

5. The extrusion coated gasket of claim 4 wherein the junction of the first end face and the first guide surface is rounded.

6. The extrusion coated gasket of claim 5 wherein the radius of the rounded corners is 1-3 mm.

7. The extrusion coated gasket of claim 3 wherein the middle portion of the first body extends to form a third body having a rectangular shape that is positioned in the channel.

8. The extrusion coated gasket of claim 7 wherein the third body includes a second end face distal from the first body, and the second end face is flush with the first end face of the second body.

9. The extrusion coated gasket as set forth in claim 1 wherein said first body and said second body each define a plurality of spaced locating holes.