CN215656073U

CN215656073U - Coating die head and coating equipment

Info

Publication number: CN215656073U
Application number: CN202121367564.0U
Authority: CN
Inventors: 杨杰; 庄龙龙; 李亚军; 蔡昌
Original assignee: Ningde Amperex Technology Ltd
Current assignee: Ningde Amperex Technology Ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-01-28
Anticipated expiration: 2031-06-18

Abstract

The application discloses coating die head and coating equipment. The coating die head comprises a sealing gasket, a first die head and a second die head, the sealing gasket is clamped between the first die head and the second die head, and the sealing gasket, the first die head and the second die head form a slit together; the second die head is provided with a plurality of first cavities which are communicated with the slits, the first cavities are arranged at intervals along a first direction, and the first direction is the length direction of the second die head; the second die head is also provided with a plurality of feed inlets, and at least one feed inlet is communicated with the first die cavity. Through the mode, the problem that the transverse weight consistency in the coating area of the base material is poor due to the fact that the pressure of each area in the cavity of the feeding cavity is inconsistent can be solved.

Description

Coating die head and coating equipment

Technical Field

The application relates to the technical field of coating equipment, in particular to a coating die head and coating equipment.

Background

Extrusion coating is widely applied to the field of lithium battery production and manufacturing due to the characteristic of high coating precision, and refers to a method for coating slurry on the surface of a substrate through a slit of a coating die head under the pressure action of a hydraulic device to obtain a finished pole piece. The coating slurry is obtained by mixing active materials, a binder, a conductive additive and other materials according to a preset proportion.

In the production process of the lithium battery, the quality of the extrusion coating process greatly influences the quality of a finished pole piece product, and the quality of the extrusion coating process is influenced by the internal structure of the coating die head, so the design of the coating die head is very important. At present, a coating die head on the market is generally provided with a feeding cavity and a feeding hole communicated with the feeding cavity, however, the whole cavity is long and narrow, and the situation that the pressure of each area in the cavity is inconsistent is easy to occur when coating slurry is filled in the long and narrow cavity, so that the consistency of the transverse weight in the coating area of a substrate is poor.

SUMMERY OF THE UTILITY MODEL

An object of the embodiments of the present application is to provide a coating die head and a coating apparatus, which aim to solve the problem of poor lateral weight uniformity in a coating region of a substrate caused by inconsistent pressure in each region of a cavity of a feeding cavity.

In order to solve the above technical problem, one technical solution adopted by the embodiments of the present application is: providing a coating die comprising a sealing gasket, a first die, and a second die; the sealing gasket is clamped between the first die head and the second die head, and the sealing gasket, the first die head and the second die head form a slit together; the second die head is provided with a plurality of first cavities which are communicated with the slits, the first cavities are arranged at intervals along a first direction, and the first direction is the length direction of the second die head; the second die head is also provided with a plurality of feed inlets, and at least one feed inlet is communicated with the first die cavity.

In a possible embodiment, the second die head is further provided with a plurality of second cavities, the plurality of second cavities are all located on one side, close to the slit, of the second die head, a second cavity and a first cavity are arranged at intervals along a second direction, and the second direction is the width direction of the second die head.

In a possible embodiment, the coating die further comprises a slot adjustment assembly and a stop. The slit adjusting assembly is connected with the stop block and can be rotatably arranged on the first die head; the stop block moves between the gaps of the slits under the rotating action of the slit adjusting assembly.

In a possible embodiment, the first die comprises a first surface facing the second die and a second surface facing away from the first die. The first die head is provided with a through hole which penetrates through the first surface and the second surface; the slit adjusting assembly comprises a micrometer fixing seat and a micrometer, the micrometer fixing seat is arranged on the second surface, the micrometer is rotatably arranged on the micrometer fixing seat, and a screw rod of the micrometer penetrates through the through hole to be connected with the stop block, so that the stop block moves between the gap of the slit.

In a possible embodiment, the number of the slit adjusting assembly and the stoppers is plural, one slit adjusting assembly is connected to one stopper, and the plurality of stoppers are sequentially arranged along the first direction.

In order to solve the above technical problem, another technical solution adopted by the embodiments of the present application is: the coating equipment comprises a support, a feeding tank, the coating die head, a pumping assembly and a main control unit, wherein the feeding tank, the coating die head and the pumping assembly are all arranged on the support, and the coating die head is provided with a plurality of feeding holes; the pump assembly is respectively connected with the feeding tank and the feeding hole, the pump assembly is used for conveying the coating slurry stored in the feeding tank to the coating die head, and the coating die head is used for coating a base material; the pump material assembly is also in communication connection with the main control unit.

In a possible embodiment, the pump assembly includes a first multi-directional manifold, a plurality of supply pumps, and a plurality of second multi-directional manifolds. The first multidirectional shunt tubes, the plurality of feed pumps and the plurality of second multidirectional shunt tubes are all installed on the support. The first multidirectional shunt tubes comprise first liquid inlet ends and a plurality of first liquid outlet ends, the first liquid inlet ends are communicated with the feeding tank, the first liquid outlet ends are communicated with a feeding pump, the feeding pump is further communicated with a second multidirectional shunt tube, and the second multidirectional shunt tubes are connected with the feeding port.

In a possible embodiment, the second multi-directional diversion pipe comprises a second liquid inlet end and a plurality of second liquid outlet ends, the second liquid inlet end is communicated with the feeding pump, and a second liquid outlet end is communicated with a feeding hole. The coating equipment further comprises a plurality of flow regulating valves, one flow regulating valve is arranged between one second liquid outlet end and one feed inlet, and the plurality of flow regulating valves are in communication connection with the main control unit.

In a possible embodiment, the coating apparatus further comprises a plurality of filters, a filter being disposed between a supply pump and a second multidirectional shunt tube.

In a possible embodiment, the coating equipment further comprises a return line and a plurality of return valves, the return line is arranged between the feeding tank and the feeding holes, the plurality of return valves correspond to the plurality of feeding holes one to one, and the plurality of return valves are all in communication connection with the main control unit.

The beneficial effects of the embodiment of the application are that: the embodiment of the application provides a coating die head and coating equipment. By arranging a plurality of first cavities independent of each other in the second die and arranging the plurality of first cavities at intervals along the first direction of the second die, the cavity with larger volume in the coating die in the prior art is divided into a plurality of cavities with smaller volume. When the pressure of the coating slurry flowing out of the feed inlet is the same, compared with a single cavity with a large volume in the prior art, the multiple cavities with small volumes of the coating die head are less influenced by the flow characteristics of the coating slurry, so that the situation that the pressures of the coating slurry in different areas of the cavities are inconsistent is improved, and the transverse weight consistency in the coating area of the base material is also improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings based on the drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a coating apparatus according to an embodiment of the present disclosure;

FIG. 2 is a top view of the coating apparatus shown in FIG. 1;

FIG. 3 is an exploded view of the construction of the coating die of the coating apparatus shown in FIG. 1;

FIG. 4 is an exploded view of another angle configuration of the coating die shown in FIG. 3;

FIG. 5 is a cross-sectional view of the assembled coating die shown in FIG. 3;

FIG. 6 is an enlarged partial view of the coating die of FIG. 5 at the die tip;

FIG. 7 is a schematic view of the construction of a gasket seal of the coating die shown in FIG. 3.

Detailed Description

In order to facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is referred to as being "fixed to" or "affixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like as used herein are for descriptive purposes only.

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 description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, a coating apparatus according to an embodiment of the present invention includes a frame 10, a supply tank 20, a pump assembly 30, a coating die 40, and a main control unit (not shown). The supply tank 20 and the pumping assembly 30 are mounted to the frame 10. The pump assembly 30 is connected to the supply tank 20 and the coating die 40, respectively, and the pump assembly 30 is communicatively connected to the main control unit. Wherein the pump assembly 30 delivers the coating slurry stored in the supply tank to the coating die 40 under the control of the main control unit. Wherein the coating slurry is sprayed onto the surface of the substrate through a coating die 40.

Next, specific structures of the supply tank 20, the pump assembly 30, and the coating die 40 will be described in order.

With respect to the supply tank 20, and with continued reference to FIG. 1, the supply tank 20 is mounted to the frame 10. The supply tank 20 is provided with a chamber (not shown) and a feed end and a discharge end which are communicated with the chamber. The feed tank 20 has a feed end for the coating slurry transferred from the outside to flow into the chamber, and the discharge end of the feed tank 20 is for the coating slurry stored in the chamber to flow to the pump assembly. Specifically, the feed end of the feed tank 20 is disposed on one side of the sidewall of the feed tank 20 near the top of the feed tank 20, and the discharge end of the feed tank 20 is disposed at the bottom of the feed tank 20. So set up, the coating thick liquids that transfer from the external world can follow the lateral wall internal surface that supplies feed tank 20 and fall into the bottom of feed tank 20, has reduced effectively that the coating thick liquids because of the risk of the viscosity increase that the pressure is too big causes when the pump-in. It should be noted that the top and bottom of the supply tank 20 are relative to the orientation the supply tank 20 has when mounted in the stand when the coating apparatus is in use. In the present embodiment, the top of the supply tank 20 is an end of the supply tank 20 away from the frame 10, and the bottom of the supply tank 20 is an end of the supply tank 20 close to the frame 10.

To ensure the slurry stability of the coating slurry in the cavity. Optionally, the coating apparatus further comprises a stirring assembly (not shown). Specifically, the stirring subassembly includes stirring rake, servo motor and speed reducer. The speed reducer and the servo motor are both installed on the feeding tank 20, the servo motor is connected with the speed reducer, the stirring paddle is sleeved on the rotor of the speed reducer, one end, far away from the rotor of the speed reducer, of the stirring paddle stretches into the containing cavity, and the paddle of the stirring paddle stretches into the containing cavity. Wherein, servo motor and main control unit communication connection. The main control unit can drive the servo motor to rotate, and the servo motor uniformly stirs the coating slurry in the cavity at a preset rotating speed so as to ensure the slurry stability of the coating slurry.

To monitor the remaining capacity of the coating slurry in the chamber. Optionally, the coating apparatus further includes a liquid level sensor (not shown) communicatively connected to the main control unit, and the liquid level sensor is disposed in the cavity and is configured to collect a liquid level value of the coating slurry stored in the supply tank 20.

With respect to the pump assembly 30, and with continued reference to fig. 2, the pump assembly 30 includes a first multi-directional manifold 31, a plurality of feed pumps 32, and a plurality of second multi-directional manifolds 33. A first plurality of manifold tubes 31, a plurality of feed pumps 32, and a plurality of second plurality of manifold tubes 33 are mounted to the frame 10. The first multi-directional shunt tube 31 comprises a first liquid inlet end and a plurality of first liquid outlet ends. The first liquid inlet end of the first multi-directional diversion pipe 31 is communicated with the discharge end of the supply tank 20. A first outlet end of the first multi-directional branch pipe 31 is communicated with a supply pump 32, and the supply pump 32 is also communicated with a second multi-directional branch pipe 33. Namely, the first outlet ends of the first multi-directional diversion pipes 31, the feeding pumps 32 and the second multi-directional diversion pipes 33 are in one-to-one correspondence. Further, the second multi-directional branch pipe 33 includes a second inlet end and a plurality of second outlet ends. A second inlet end of a second multi-directional shunt 33 is in communication with a feed pump 32 and a plurality of second outlet ends of a second multi-directional shunt 33 are in communication with the coating die 40. Wherein, a plurality of feed pumps 32 all are connected with master control unit communication. Preferably, the feed pump 32 is a high precision speed adjustable miniature screw pump.

For convenience of illustration, in the following embodiments of the present application, the second outlet end of the second multi-directional diversion pipe 33 can be understood as an outlet of the pumping assembly 30.

Referring to fig. 5, referring to fig. 3 and 4, the coating die 40 has a first cavity 433, and a feed inlet 40a and a slit 40b communicating with the first cavity. Specifically, coating die 40 includes a sealing gasket 42, a first die 41, and a second die 43. The sealing gasket 42 is sandwiched between the first die head 41 and the second die head 43, and the sealing gasket 42, the first die head 41 and the second die head 43 cooperate to form the slit 40 b. The second die head 43 is provided with a plurality of first cavities 433 communicated with the slit 40b, the plurality of first cavities 433 are arranged at intervals along a first direction X, and the first direction X is a length direction of the second die head 43 (i.e., a length direction of the first die head 41, the second die head 43, and the sealing gasket 42). Second die 43 is also provided with a plurality of feed ports 40 a. At least one feed port 40a communicates with a first cavity 433. In other words, the plurality of feed openings 40a of the coating die head 40 and the plurality of second outlet ends of the plurality of second multi-directional branch pipes 33 are in a one-to-one correspondence relationship.

By providing a plurality of first cavities 433 independent of each other in the second die 43 and disposing the plurality of first cavities 433 at intervals along the length of the second die 43, the relatively large volume cavity in the prior art coating die 40 is divided into a plurality of relatively small volume cavities. When the pressure of the coating slurry flowing out from the feed port 40a is the same, compared with a single cavity with a larger volume in the prior art, the multiple cavities with smaller volumes of the coating die head provided in the embodiment of the present application are less affected by the flow characteristics of the coating slurry, so that the situation that the pressures of the coating slurries in different areas of the cavities are inconsistent is improved to a certain extent, that is, the transverse weight consistency in the coating area of the substrate is improved.

Next, referring to fig. 3 and fig. 4, the specific structure of the first die 41, the second die 43 and the sealing gasket 42 will be described in sequence.

With respect to the first die 41, please refer to fig. 3, the first die 41 is substantially hexahedral. Specifically, the first die 41 includes a first die body 411 and a first die lip 412. The first die body 411 includes a first surface facing the second die 43 and a second surface facing away from the second die 43, a first die lip 412 is formed extending from one end of the first surface along the second direction Y to the outside of the first die body 411, and the first die lip 412 is used for cooperating with the second die 43 to form a die nozzle of the coating die 40.

Further, the first die body 411 is opened with a first positioning hole 41 a. The first positioning hole 41a is at the other end of the first die body 411 in the second direction Y, that is, in the second direction Y, and the first positioning hole 41a is at the end of the first die body 411 away from the first die lip 412. The first positioning hole 41a penetrates the second surface and the first surface. The first positioning hole 41a is for passing a clamping screw, so that the clamping screw is connected to the sealing gasket 42 and the second die 43, respectively. The second direction Y is the width direction of the second die 41 (i.e., the width direction of the coating die 40, the second die 43, and the sealing gasket 42).

With the aforementioned second die 43, the second die 43 has a substantially hexahedral shape. Specifically, the second die includes a second die body 431 and a second die lip 432. The second die body 431 includes a third surface facing the first die 41 and a fourth surface facing away from the first die 41. The second die lip 432 is formed to extend from one end of the third surface in the second direction Y to the outside of the second die body 431. The second die lip 432 can cooperate with the first die lip 412 to form a die tip 40b having a slot 40b, the slot 40b being used for coating the surface of the substrate with the coating slurry.

Further, the second die head main body 431 is provided with a plurality of first cavities 433, and the plurality of first cavities 433 are arranged at intervals along the first direction X. Wherein the orifices of the plurality of first cavities 433 are all directed toward the second surface of the first die body 411. Preferably, the volumes of the first cavities 433 are all equal. With this arrangement, the process for manufacturing the second die can be simplified, and the coating slurry lateral weight uniformity can be further improved.

The second die body 431 also defines a plurality of feed ports 40 a. In the second direction Y, feed port 40a is on a side of second die body 431 away from second lip 432. One end of a feeding hole 40a is connected to a second liquid outlet end of a second multi-directional flow-dividing pipe 33, and the other end of the feeding hole 40a is communicated with the first cavity 433. Preferably, at least one feed port 40a communicates with a first cavity 433. For example, in the embodiment of the present application, three feed ports 40a are disposed at intervals in the same first cavity along the first direction X.

Further, the second die body 431 is opened with a second positioning hole 43a, the second positioning hole 43a penetrates through the third surface, and the second positioning hole 43a is used for passing a clamping screw to connect with the first die 41.

To further improve the coating paste cross direction weight consistency. Optionally, second die body 431 is further provided with a plurality of second cavities 434. The plurality of second cavities 434 are spaced apart along the first direction X. Along the second direction Y, a plurality of second cavities 434 are located on the side of the second die body 431 near the second die lip 432, that is, a second cavity 434 and a first cavity 433 are arranged at intervals along the second direction Y. Wherein a volume of a second cavity 434 is smaller than a volume of a first cavity 433. Preferably, the volumes of the second cavities 434 are equal. The second cavity 434 is disposed between the first cavity 433 of the coating die 40 and the slit 40b, and during the spraying process of the coating die 40, the coating slurry sprayed from the slit 40b is buffered by the second cavity 434 to reduce the flow rate of the coating slurry, which is beneficial to adjusting the lateral weight of the coating slurry sprayed from the slit 40 b.

Referring to fig. 6, the sealing gasket 42 is substantially rectangular plate-shaped. Specifically, the sealing gasket 42 includes a gasket main body 421, a first frame 422, and a second frame 423. The gasket main body 421, the first frame 422 and the second frame 423 jointly enclose a flow channel 42a, the flow channel 42a is located at one end of the sealing gasket 42 along the second direction Y, one end of the flow channel 42a close to the slit 40b is communicated with the slit 40b, and the flow channel 42a is used for allowing the coating slurry to flow out of the slit 40 b. The first frame 422 and the second frame 423 are formed by extending the gasket main body 421 in the same direction along the second direction Y. In the embodiment of the present application, there are a plurality of flow channels, and the plurality of flow channels 42a correspond to the plurality of first cavities 433 one to one. The coating slurry flowing out of the first cavity 433 flows into the flow path 42a, and then flows out of the flow path 42a to the slit 40 b. It should be noted that the gap size of the slit 40b of the coating die 40 depends on the thickness size of the sealing gasket 42.

Further, the gasket main body 421 is provided with a third positioning hole 42a, and the third positioning hole 42a is used for passing a clamping screw to connect with the first die 41 and the second die 43. Preferably, the hole axes of the third positioning hole 42a, the second positioning hole 43a, and the first positioning hole 41a are coaxially arranged.

To facilitate adjustment of the transverse weight consistency of the coating slurry, the coating die 40 optionally further includes a slot adjustment assembly 44 and a stop 45. The slit adjusting assembly 44 is connected to the stopper 45, and the slit adjusting assembly 44 is rotatably provided to the first die body 411. The position of the stop 45 relative to the slot 40b can be adjusted by rotating the slot adjustment assembly 44. Specifically, the second die 43 is provided with a through hole 43a, the through hole 43a penetrates through the second surface and the first surface, the slit adjusting assembly 44 includes a micrometer fixing seat 441 and a micrometer 442, the micrometer 442 is rotatably mounted on the micrometer fixing seat 441, the micrometer fixing seat 441 is fixed on the second surface of the first die body 411, and a screw of the micrometer 442 penetrates through the through hole 43a to be connected with the stopper 45, so that the stopper 45 moves through the slit 40b between the first surface and the third surface. The number of the slit adjusting assemblies 44 and the stoppers 45 is plural, one slit adjusting assembly 44 is connected to one stopper 45, and the plural stoppers 45 are sequentially arranged along the first direction X, and preferably, along the first direction X, the distance between two adjacent stoppers 45 is equal to the distance between the first bending portion 424 and the second bending portion 425.

Further, one end of the first frame 422 of the sealing gasket 42 close to the die lip extends to one side in the first direction X to form a first bending portion 424, and one end of the second frame 423 of the sealing gasket 42 close to the die lip extends to two sides in the first direction X to form a second bending portion 425.

In order to filter out the metal impurities with larger particle size remained in the coating slurry during the production process, optionally, the coating apparatus further comprises a plurality of filters 50, the number of the filters 50 is equal to the number of the supply pumps 32, and a filter 50 is disposed between one of the supply pumps 32 and the first outlet end of the first multi-directional diversion pipe 31. Preferably, the filter 50 is a multi-stage filter cartridge.

To improve the flow fluctuation of the coating slurry flowing out from the first outlet ends of the first multidirectional shunt tubes 31. Optionally, the coating apparatus includes a plurality of flow regulating valves 60, the number of the flow regulating valves 60 corresponds to the number of the second liquid outlet ends of the second multi-directional branch pipes 33, wherein one flow regulating valve 60 is disposed between one second liquid outlet end of one second multi-directional branch pipe 33 and the coating die head 40. Preferably, the flow regulating valve 70 is a speed regulating valve.

To reduce the waste of coating slurry in the first cavity 433 of the coating die 40. Optionally, the coating apparatus further comprises a return line 70 and a plurality of return valves 80. One end of the return line 70 is connected to the supply tank 20, the other end of the return line 70 is connected to a second outlet end of a second multi-directional shunt 33, and a return valve 80 is connected to a line between a second outlet end of the second multi-directional shunt 33 and a supply port 40a of the coating die 40. In use, the flow control valve 60 may be closed and the return valve 80 may be opened, so that the coating slurry remaining in each of the first cavities 433 may flow into the supply tank 20 through the corresponding return line 70.

In the embodiment of the application, the coating equipment can effectively improve the problem of poor transverse weight consistency among different zebra stripes by primary regulation of the feeding pump 32, secondary regulation of the flow regulating valve 60 and tertiary regulation of the slit regulating assembly 44, and the feeding pump 32 is replaced by a single large-flow low-precision pump to form a plurality of small-flow high-precision pumps, so that the feeding fluctuation is reduced, and the weight consistency of longitudinal coating slurry is improved. In addition, the coating die head 40 is optimized to be a plurality of sub-cavity structures from an integral single-cavity structure, each sub-cavity is optimized to be a plurality of feed inlets 40a from a single feed inlet and is combined with independent sub-cavity to independently feed, and the problem of poor transverse weight consistency in the same zebra stripes is effectively solved.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A coating die head comprises a sealing gasket, a first die head and a second die head, wherein the sealing gasket is clamped between the first die head and the second die head, and the sealing gasket, the first die head and the second die head together form a slit,

the second die head is provided with a plurality of first cavities, the first cavities are communicated with the slits, the first cavities are arranged at intervals along a first direction, and the first direction is the length direction of the second die head; the second die head is also provided with a plurality of feed inlets, and at least one feed inlet is communicated with the first die cavity.

2. The coating die of claim 1,

the second die head is also provided with a plurality of second cavities which are all positioned on one side of the second die head close to the slit; the second cavity and the first cavity are arranged at intervals along a second direction, and the second direction is the width direction of the second die head.

3. The coating die of claim 2,

the coating die head also comprises a slit adjusting component and a stop block;

the slit adjusting assembly is connected with the stop block, the slit adjusting assembly is rotatably arranged on the first die head, and the stop block moves between the gaps of the slits under the rotating action of the slit adjusting assembly.

4. The coating die of claim 3,

the first die head comprises a first surface facing the second die head and a second surface facing away from the first die head, and is provided with a through hole which penetrates through the first surface and the second surface;

the slit adjusting assembly comprises a micrometer fixing seat and a micrometer, the micrometer fixing seat is arranged on the second surface, the micrometer is rotatably arranged on the micrometer fixing seat, and a screw rod of the micrometer penetrates through the through hole to be connected with the stop block, so that the stop block moves between gaps of the slit.

5. The coating die of claim 3, wherein the number of the slit adjusting assembly and the stoppers is plural, one slit adjusting assembly is connected to one stopper, and the plural stoppers are arranged in sequence along the first direction.

6. A coating apparatus, comprising:

a support;

the feeding tank is arranged on the bracket;

the coating die of any one of claims 1-5, mounted to the frame, the coating die having a plurality of feed ports;

the pump assembly is arranged on the bracket, is respectively connected with the feed tank and the feed inlet, and is used for conveying the coating slurry stored in the feed tank to the coating die head which is used for coating a substrate; and

and the main control unit is in communication connection with the pumping assembly.

7. Coating apparatus according to claim 6,

the pump material assembly comprises a first multi-directional flow dividing pipe, a plurality of supply pumps and a plurality of second multi-directional flow dividing pipes;

the first multidirectional flow dividing pipe, the plurality of feeding pumps and the plurality of second multidirectional flow dividing pipes are all arranged on the bracket;

the first multidirectional flow dividing pipe comprises a first liquid inlet end and a plurality of first liquid outlet ends, the first liquid inlet end is communicated with the feeding tank, one first liquid outlet end is communicated with the feeding pump, and the feeding pump is also communicated with the second multidirectional flow dividing pipe; wherein, a plurality of the multidirectional shunt tubes of second all with the feed inlet is connected.

8. Coating apparatus according to claim 7,

the second multidirectional flow dividing pipe comprises a second liquid inlet end and a plurality of second liquid outlet ends, the second liquid inlet end is communicated with the feeding pump, and one second liquid outlet end is communicated with one feeding hole;

the coating equipment further comprises a plurality of flow regulating valves, one flow regulating valve is arranged between the second liquid outlet end and the feed inlet, and the flow regulating valves are in communication connection with the main control unit.

9. A coating apparatus as in claim 7, further comprising a plurality of filters, one said filter being disposed between one said feed pump and one said second multidirectional shunt.

10. The coating apparatus of claim 7, further comprising a return line and a plurality of return valves, wherein the return line is disposed between the supply tank and the feed ports, the plurality of return valves are in one-to-one correspondence with the plurality of feed ports, and the plurality of return valves are all in communication connection with the master control unit.