CN210647071U

CN210647071U - Coating die and coating equipment

Info

Publication number: CN210647071U
Application number: CN201921252153.XU
Authority: CN
Inventors: ***; 陈文�; 吴灏
Original assignee: Ningde Amperex Technology Ltd
Current assignee: Ningde Amperex Technology Ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-06-02
Anticipated expiration: 2029-08-02

Abstract

The application provides a coating mould, coating mould include the die head and with go up the lower die head that the die head set up relatively, go up the die head with form the coating region between the die head down, wherein, the die head be provided with down with the first dashpot that the coating region is linked together to seted up with a plurality of first passageways that first dashpot is linked together, a plurality of first passageways be used for to first dashpot feed. The application also provides a coating device comprising the coating die. The application provides a coating die and coating equipment through setting up a plurality of first passageways that are linked together with first dashpot, makes by a plurality of first passageways are carried the whole pressure distribution of the thick liquids in the first dashpot is even, has improved the uniformity of the horizontal thickness of coating film.

Description

Coating die and coating equipment

Technical Field

The application relates to the technical field of battery manufacturing, in particular to an electrode plate coating die and coating equipment.

Background

An important process in the production process of the battery is to coat the cathode and anode slurry on the surface of a current collector. There is a coating apparatus which is provided with one or two buffer tanks of large volume and is fed from the center. However, when the slurry is fed from the center to the buffer tank, the slurry flows from the center to both sides, resulting in pressure attenuation, and when wide coating is performed, the thickness of the coating film gradually decreases from the center to both sides in the transverse direction, resulting in poor transverse uniformity.

SUMMERY OF THE UTILITY MODEL

Based on the defects of the prior art, the application provides a coating die and coating equipment with good transverse consistency of coating film thickness.

The application provides a coating mould, coating mould include the die head and with go up the lower die head that the die head set up relatively, go up the die head with form the coating region between the die head down, wherein, the die head be provided with down with the first dashpot that the coating region is linked together to seted up with a plurality of first passageways that first dashpot is linked together, a plurality of first passageways be used for to first dashpot feed.

The present application also provides a coating apparatus comprising: a container for storing a slurry; the coating die described above; and a plurality of first conduits, each first conduit communicating the vessel with a respective first channel for transporting the slurry from the vessel to the first buffer tank.

The application provides a coating die and coating equipment through setting up a plurality of first passageways that are linked together with first dashpot, makes by a plurality of first passageways are carried the whole pressure distribution of the thick liquids in the first dashpot is even, has improved the uniformity of the horizontal thickness of coating film.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic perspective view of a coating die according to an embodiment of the present disclosure.

Fig. 2 is a partially exploded view of the coating die of fig. 1.

Fig. 3 is a partial schematic view of the coating die of fig. 1.

Fig. 4 is a functional block diagram of a coating apparatus according to an embodiment of the present application.

Description of the main elements

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

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 apparent that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive effort based on the embodiments in the present application are within the scope of protection of the present application.

It is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application.

Referring to fig. 1 to 3, a coating die 100 for coating a slurry on a workpiece to be coated is provided in the present embodiment. The coating die 100 includes an upper die 10, a lower die 30, a plurality of partitions 50, and a shim 70. The lower die 30 is disposed opposite to the upper die 10, the shim 70 is disposed between the upper die 10 and the lower die 30, and the plurality of partitions 50 are disposed on the lower die 30 and abut against the upper die 10.

The lower die 30 has a substantially rectangular block shape. The lower die 30 is provided with a receiving groove 31, and a plurality of first passages 33 and a plurality of second passages 35 communicated with the receiving groove 31 are opened. The housing groove 31 extends in the longitudinal direction of the lower die 30. The plurality of first channels 33 and the plurality of second channels 35 are arranged at intervals along the length direction of the lower die 30, wherein the plurality of first channels 33 are located at the middle portion of the lower die 30, and the plurality of second channels 35 are located at both sides of the lower die 30.

The plurality of partitions 50 are disposed on the lower die 30, are accommodated in the accommodating grooves 31, and protrude from the surface of the lower die 30. The plurality of partitions 50 partition the storage tub 31 into a first buffer tub 311 and a plurality of second buffer tubs 313. The first buffer groove 311 is located at the middle of the lower die 30 and corresponds to the plurality of first passages 33. The plurality of first passages 33 are communicated with the first buffer tank 311 to supply the first buffer tank 311 with a material. The plurality of second buffer grooves 313 are positioned at both sides of the lower die 30 and correspond to the plurality of second passages 35. Each of the second passages 35 communicates with a corresponding second buffer tank 313 for supplying the corresponding second buffer tank 313. The size of the second buffer grooves 313 is smaller than that of the first buffer grooves 311, and the pipe diameters of the second channels 35 are smaller than that of each first channel 33.

In this embodiment, the plurality of first channels 33 are uniformly spaced along the length direction of the lower die head 30, and the pipe diameters of the plurality of first channels 33 are the same; the plurality of second buffer grooves 313 are disposed at both side edges of the lower die 30 in two groups. According to an embodiment of the present application, each group of the second buffer grooves 313 is four, and the pipe diameters of the plurality of second passages 35 are the same. Those skilled in the art will appreciate that according to other embodiments of the present application, the number of the second buffer grooves 313 in each group may have other values; the number can be flexibly adjusted according to the width of the edge area of the coating film and the fluid parameters. According to an embodiment of the present application, each second buffer tank 313 communicates with one second passage 35; of course, according to other embodiments of the present application, each second buffer groove 313 may also communicate with a plurality of second passages 35.

In the length direction of the lower die 30, the width of the second buffer groove 313 adjacent to the first buffer groove 311 in each set of second buffer grooves 313 is greater than the width of the second buffer groove 313 distant from the first buffer groove 311. Specifically, the widths of two second buffer slots 313 adjacent to the first buffer slot 311 in the four second buffer slots 313 are all greater than the widths of the other two second buffer slots 313 far from the first buffer slot 311, wherein the widths of the two second buffer slots 313 adjacent to the first buffer slot are equal, and the widths of the other two second buffer slots 313 far from the first buffer slot 311 are equal.

Each of the partitions 50 includes a first portion 51 and a second portion 53. The first portion 51 is fixedly accommodated in the accommodating groove 31, and the second portion 53 extends from the first portion and protrudes from the surface of the lower die 30.

The upper die 10 is substantially rectangular block-shaped, is disposed above the lower die 30, abuts against the plurality of partitions 50, and covers the receiving groove 31.

The shim 70 is disposed between the upper die 10 and the lower die 30, and forms a coating region 20 and a discharge port 40 together with the upper die 10 and the lower die 30. The coating region 20 is formed between the upper die 10 and the lower die 30, and is communicated with the first buffer groove 311 and the plurality of second buffer grooves 313, respectively. The discharge port 40 is formed between the side edges of the upper die 10 and the lower die 30, and communicates with the coating region 20, so as to discharge from the coating region 20 to the workpiece to be coated.

The gasket 70 includes a first surface and a second surface disposed opposite to each other, and a plurality of side surfaces connecting the first surface and the second surface. The first surface is attached to the lower surface of the upper die 10 and the second surface is attached to the upper surface of the lower die 30. The gasket 70 is provided with an opening 71, and the opening 71 penetrates through the first surface, the second surface and the first side surface of the gasket 70. The sides of the opening 71, the lower surface of the upper die 10, and the upper surface of the lower die 30 collectively form the coating region 20. The side edges 711 of the opening 71 abut against the side edges of the second portions 53 of the plurality of separators 50. The thickness of the shim 70 is equal to the thickness of the second portion 53 in the thickness direction of the coating die 100, so that the second portion 53 abuts against the lower surface of the upper die 10.

Referring to fig. 4, the present application also provides a coating apparatus 200, which includes the coating mold 100, a container 210, a plurality of first pipes 220, and a plurality of second pipes 230. The container 210 is used to store slurry. Each first pipe 220 communicates the vessel 210 with the corresponding first channel 33 for transporting the slurry from the vessel 210 to the first buffer tank 311. Each second conduit 230 communicates the vessel 210 with the respective second channel 35 for transporting the slurry from the vessel 210 to the respective second buffer tank 313.

Further, the coating apparatus 200 further includes a plurality of first control members 240 and a plurality of second control members 250. Each first control member 240 is disposed in a corresponding first pipe 220 for controlling the flow rate of the slurry in the first pipe 220. Each second control member 250 is disposed in a corresponding second pipe 230 for controlling the flow rate of the slurry in the second pipe 230. The first and

second control members

240 and 250 may be regulating valves.

By adjusting and controlling the plurality of first controls 240, the flow rate of the slurry delivered by the plurality of first pipes 220 into the plurality of first channels 33 is kept consistent; the overall pressure of the slurry conveyed into the first buffer tank 311 is distributed uniformly, and the problem of pressure attenuation caused by the slurry flowing from the center to the two sides in the prior art is solved; so that the thickness of the coating film in the middle region formed by the slurry conveyed from the first buffer tank 311 to the coating region 20 and discharged to the workpiece to be coated through the discharge port 40 is uniform throughout the length direction of the coating die 100, thereby improving the transverse uniformity.

By controlling the plurality of second control members 250, the flow rates of the slurry conveyed into the corresponding second passages 35 through the plurality of second pipelines 230 are respectively adjusted, and then the thickness of the coating film in the edge area formed by conveying the slurry from the plurality of second buffer grooves 313 to the coating area 20 is adjusted, so that the thickness of the coating film in the edge area is consistent with that of the coating film in the middle area, the problem of thickness reduction caused by coating edge flaring in the prior art is solved, and the transverse consistency is further improved.

The application provides a coating die 100 and coating equipment 200, through setting up a plurality of first passageways 33 that are linked together with first dashpot 311, make by a plurality of first passageways 33 carry the overall pressure distribution of the thick liquids in first dashpot 311 is even, has improved the uniformity of the horizontal thickness of coating film. In addition, the plurality of second buffer grooves 313 which are separated from the first buffer grooves 311 and are positioned at two sides of the first buffer grooves 311 and the plurality of second channels 35 which are matched with the plurality of second buffer grooves 313 are arranged, so that the thickness of the coating film positioned in the edge area is adjusted, the thickness of the edge area of the coating film is kept consistent with that of the middle area, and the consistency of the transverse thickness of the coating film is further improved.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.

Claims

1. A coating die is characterized by comprising an upper die head and a lower die head arranged opposite to the upper die head, wherein a coating area is formed between the upper die head and the lower die head,

the lower die head is provided with a first buffer groove communicated with the coating area, and is provided with a plurality of first channels communicated with the first buffer groove, and the first channels are used for supplying materials to the first buffer groove.

2. The coating die of claim 1 wherein the first plurality of channels are evenly spaced along the length of the lower die.

3. The coating die of claim 1, wherein the lower die head is further provided with a plurality of second buffer grooves communicating with the coating region, and a plurality of second passages; the plurality of second buffer grooves are positioned on two sides of the first buffer groove and are arranged at intervals along the length direction of the lower die head, and each second channel is communicated with the corresponding second buffer groove and is used for supplying materials to the corresponding second buffer groove; wherein the first buffer tank is located at the middle of the lower die and the plurality of second buffer tanks are located at the edge of the lower die.

4. A coating die as in claim 3, wherein the size of each of said second plurality of buffer slots is smaller than the size of said first buffer slot, and the pipe diameter of each of said second plurality of passages is smaller than the pipe diameter of each of said first passages.

5. A coating die as claimed in claim 3, wherein a width of the second buffer slot adjacent to the first buffer slot is greater than a width of the second buffer slot remote from the first buffer slot in a length direction of the coating die.

6. A coating die as set forth in claim 3, further comprising a plurality of partitions provided to the lower die for forming the plurality of second buffer grooves, the plurality of partitions respectively protruding from the surface of the lower die.

7. The coating die of claim 6 further comprising a shim disposed between the upper die and the lower die, the shim having an opening, the upper die, and the lower die collectively forming the coating region.

8. The coating die of claim 7 wherein the side edges of said plurality of baffles abut the side edges of said opening, each of said baffles comprising a first portion disposed in said lower die and a second portion extending from said first portion and protruding above the surface of said lower die; the thickness of the second portion is equal to the thickness of the spacer in the thickness direction of the coating die.

9. A coating die according to claim 7, wherein the side of the opening, the side of the upper die and the side of the lower die enclose a discharge opening.

10. A coating apparatus, comprising:

a container for storing a slurry;

the coating die of any one of claims 1-9; and

a plurality of first conduits, each first conduit communicating the vessel with a respective first channel for transporting the slurry from the vessel to the first buffer tank.

11. A coating apparatus as in claim 10, further comprising a plurality of first controls, each of the first controls being disposed in a respective one of the first conduits and controlling a flow rate of the slurry in the first conduit.