CN115106259A

CN115106259A - Coating device and coating process

Info

Publication number: CN115106259A
Application number: CN202210816260.0A
Authority: CN
Inventors: 罗云峰; 瞿新华; 邓文辉
Original assignee: Huizhou Yinghe Technology Co Ltd
Current assignee: Huizhou Yinghe Technology Co Ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-09-27

Abstract

The invention relates to the technical field of lithium ion battery production equipment, and specifically discloses a coating device, comprising: a return valve, which is provided with a feed port and a return port; a coating valve, the feed end of the coating valve and the return valve The discharge end of the valve is connected, and the coating valve is provided with a discharge port; the return channel, the return channel is connected with the return port, the return channel is provided with multiple groups, the multiple groups of return channels are arranged in parallel, and the multiple groups of return channels are all provided with diaphragms valve; control valve, the control valve is arranged on the backflow channel to open or close multiple groups of backflow channels; die head, the die head communicates with the discharge port. By switching and opening different return passages by controlling the valve, the blanking operation of different blanking sizes can be performed without the need to adjust the diaphragm valve, which can effectively shorten the adjustment time of the return pressure in the return passage and realize the return pressure. The fast switching adjustment of the fuselage can improve its stability, which is conducive to the accurate control of the size of the blank space.

Description

Coating device and coating process

Technical Field

The invention relates to the technical field of lithium ion battery production equipment, in particular to a coating device and a coating process.

Background

The lithium battery industry is taken as a new development direction of new energy technology, and the lithium battery technology is widely applied to the fields of digital code, power, energy storage and the like. In the field of lithium battery production, the requirement of improving the performance of lithium batteries, particularly large-capacity power batteries, is that a plurality of small batteries are connected in series or in parallel, so that the requirement on the performance consistency of single batteries is very high. As the most critical coating link influencing the performance of the battery, the quality of the coating directly influences the capacity of the battery.

In the coating operation, an intermittent coating operation is often used so that a margin gap of a predetermined size is formed in the copper foil or the aluminum foil, and a required return pressure in the return line is different due to the difference in the margin size. All be provided with single group's return line usually among the current coating device, then when carrying out the coating operation of multiple different size of remaining white, just need adjust the diaphragm valve in this return line in real time, just can form different back flow pressure, so make back flow pressure's regulation time longer to be unfavorable for the clearance to leave white accurate control of size, back flow pressure's stability also not good, the promotion of intermittent type coating efficiency and quality of being not convenient for.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a coating device, which solves the problems that in the prior art, the regulation time of the reflux pressure is longer, so that the accurate control of the gap blank size is not facilitated, the stability of the reflux pressure is not good, and the intermittent coating efficiency and the quality are not facilitated to be improved.

In order to achieve the above purpose, the present invention provides the following technical solutions:

a coating apparatus, comprising:

the backflow valve is provided with a feeding hole and a backflow hole;

the feed end of the coating valve is communicated with the discharge end of the reflux valve, and a discharge hole is formed in the coating valve;

the backflow channels are communicated with the backflow port and provided with a plurality of groups, the plurality of groups of backflow channels are arranged in parallel, and diaphragm valves are arranged on the plurality of groups of backflow channels;

the control valve is arranged on the backflow channels to open or close the multiple groups of backflow channels;

the die head is communicated with the discharge hole.

Optionally, two sets of return channels are provided.

Optionally, the control valve comprises a pneumatic three-way ball valve.

Optionally, the control valve is provided with two control valves, and the two control valves are arranged in one-to-one correspondence with the two sets of backflow channels.

Optionally, the coating apparatus further comprises a first pressure sensor for detecting the pressure of the cavity in the die head.

Optionally, the coating apparatus further comprises a second pressure sensor for detecting a return pressure of the return channel.

Optionally, the coating device further comprises a return pipe, wherein a return port is formed in the die head, and the return pipe is communicated with the return port.

Optionally, the backflow valve and the coating valve both include a valve body, a valve core and a linear motor, the valve body is provided with the backflow port/the discharge port, the valve core is arranged in the valve body, and the linear motor is in driving connection with the valve core to drive the valve core to open or close the backflow port and the discharge port.

The invention also provides a coating process, which comprises the following steps:

and (3) feeding operation: adding the slurry from the feed inlet;

coating operation: closing the backflow port and opening the discharge port to enable the slurry to enter the die head for coating operation;

white leaving operation: and opening the backflow port, closing the discharge port, and opening a preset group of backflow channels or a plurality of groups of backflow channels through the control valve so as to enable the slurry to flow into the storage tank.

Optionally, the backflow pressures in the plurality of sets of backflow channels are different.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides a coating device, which can adjust the reflux pressure of a plurality of groups of reflux channels to different set values by adjusting a diaphragm valve; when the coating die is used, slurry is added from the feeding hole, and then the slurry can flow into the die head from the discharging hole by closing the backflow hole and opening the discharging hole, so that the coating use requirement can be met; otherwise, when the blank leaving operation is required, the blank leaving operation can be realized by opening the backflow port, closing the discharge port, then opening a group of backflow channels matched with the blank leaving size through the control valve, and closing the other backflow channels; moreover, switch through the control valve and open different return channels, then can carry out the white operation of leaving of different white sizes, and need not to adjust the diaphragm valve again to can effectively subtract the regulation time of return pressure among the short return channel, and can realize return pressure's fast switch and adjust, with improve its stability, and then be favorable to leaving the accurate control of white clearance size, and be convenient for promote intermittent type coating efficiency and coating quality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of 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 invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a schematic view of an overall structure of a coating apparatus according to the present invention;

FIG. 2 is a cross-sectional view of the positions of a reflux valve and a coating valve of a coating apparatus provided by the present invention;

fig. 3 is an enlarged schematic view of a portion a in fig. 2 according to the present invention.

In the above figures: 2. a reflux valve; 21. a feed inlet; 22. a return port; 3. a coating valve; 31. a discharge port; 4. a return channel; 41. a diaphragm valve; 5. a control valve; 6. a die head; 7. a first sensor; 8. a second sensor; 9. a return pipe.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the detailed description of the invention is intended to be illustrative of the invention and is not intended to limit the invention. Wherein the exemplary embodiments are described as processes or methods depicted as flowcharts; although a flowchart may describe the operations or processing of steps in a certain order, many of the operations or steps can be performed in parallel, concurrently or simultaneously, and the order of the operations can be re-arranged. When its operations or steps are completed, the corresponding process may be terminated, with additional steps not included in the figures. The aforementioned processes may correspond to methods, functions, procedures, subroutines, and the like, and the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

The term "include" and variations thereof as used herein are intended to be open-ended, i.e., "including but not limited to". The term "based on" is "based, at least in part, on". The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings; it is to be understood that only some of the structures associated with the present invention are shown in the drawings for convenience of description, not all of the structures.

Referring to fig. 1 to 3 in combination, an embodiment of the invention provides a coating apparatus, including:

the return valve 2, the return valve 2 is equipped with feed inlet 21 and return port 22;

the feeding end of the coating valve 3 is communicated with the discharging end of the reflux valve 2, and the coating valve 3 is provided with a discharging hole 31;

the backflow channel 4 is communicated with the backflow port 22, the backflow channel 4 is provided with a plurality of groups, the plurality of groups of backflow channels 4 are arranged in parallel, and diaphragm valves 41 are arranged on the plurality of groups of backflow channels 4; the diaphragm valve 41 is prior art and will not be described herein;

the control valve 5 is arranged on the return channels 4, and is used for opening or closing the plurality of groups of return channels 4;

and the die head 6 is communicated with the discharge port 31.

According to the scheme, the backflow pressure of the multiple groups of backflow channels 4 can be adjusted to different set values by adjusting the diaphragm valves 41; when the coating die is used, slurry is added from the feeding hole 21, then the backflow hole 22 is closed, and the discharging hole 31 is opened, so that the slurry can flow into the die head 6 from the discharging hole 31, and the coating use requirement can be met; on the contrary, when the blank leaving operation is required, the blank leaving operation can be realized by opening the return port 22 and closing the discharge port 31, then opening a group of return channels 4 matched with the blank leaving size through the control valve 5, and closing the other return channels 4; moreover, switch through control valve 5 and open different return channel 4, then can carry out the blank operation of different blank sizes, and need not to adjust diaphragm valve 41 again to can effectively shorten return channel 4 in return pressure's accommodate time, and can realize return pressure's quick switch adjustment, with improve its stability, and then be favorable to leaving the accurate control of blank clearance size, and be convenient for promote intermittent type coating efficiency and coating quality.

In this embodiment, when in use, the thickness of the head and tail positions of the coating can be further processed by the time difference between the opening and closing of the return opening 22 and the discharge opening 23, so as to improve the coating quality.

Specifically, in order to enable the control valve 5 to open or close the backflow channel 4 more quickly so as to improve the coating efficiency and the coating quality, two groups of backflow channels 4 are provided; the control valve 5 comprises a pneumatic three-way ball valve.

In this embodiment, pneumatic tee bend ball valve is equipped with one, and the reflux pressure in both return channels 4 is also different, then opens one of them group return channel 4 through pneumatic tee bend ball valve fast and just can satisfy the white clearance size processing demand of leaving that corresponds.

In addition, the control valves 5 may be provided in two pieces, and the two pieces of control valves 5 are provided in one-to-one correspondence with the two sets of return passages 4. Realize opening and closing operation of two sets of return channels 4 respectively through two piece control valve 5, and then just can select to open a set of return channel 4 that reflux pressure and margin size match according to the size of margin size to satisfy the operation user demand that leaves white.

Of course, the control valve 5 may also be a solenoid valve or a hydraulic valve.

Specifically, in order to facilitate real-time detection of the cavity pressure in the die head 6 to ensure the coating quality, the coating device further comprises a first pressure sensor 7, and the first pressure sensor 7 is used for detecting the cavity pressure in the die head 6.

Specifically, in order to facilitate real-time detection of the backflow pressure in the backflow channel 4 to ensure the quality of the blank leaving operation, the coating device further comprises a second pressure sensor 8, and the second pressure sensor 8 is used for detecting the backflow pressure of the backflow channel 4.

Specifically, when in order to make 6 completion coating operations of die head, can with remaining thick liquids in the die head 6 backward flow to the storage tank in to can enough practice thrift the thick liquids, the coating operation of next time of can being convenient for again, this coating device still includes back flow 9, is equipped with the feed back mouth on the die head 6, back flow 9 and feed back mouth intercommunication.

Specifically, for more convenient realization open or close return opening 22 and discharge gate 31 to satisfy coating operation or leave white operation demand, return valve 2 and coating valve 3 all include valve body, case and linear electric motor, are equipped with return opening 22/discharge gate 31 on the valve body, and the case is located in the valve body, and linear electric motor is connected with the case drive, opens or closes return opening 22 and discharge gate 31 with order about the case.

In this embodiment, also can change linear electric motor for the cylinder to can realize again carrying out quick drive to the case and adjust, in order to satisfy the user demand.

The embodiment of the invention also provides a coating process, which comprises the following steps:

and (3) feeding operation: the slurry is added from the feed port 21;

coating operation: the return opening 22 is closed and the discharge opening 31 is opened to allow the slurry to enter the die head 6 for coating operation;

white leaving operation: the return port 22 is opened, the discharge port 31 is closed, and a predetermined set of return channels 4 or sets of return channels 4 are opened by the control valve 5 to allow the slurry to flow into the storage tank.

In this embodiment, the sequence of the coating operation and the blank leaving operation is not only fixed, and the coating operation may be performed first and then the blank leaving operation may be performed, or the blank leaving operation may be performed first and then the coating may be performed, and the corresponding sequence may be selected according to the processing requirement of time during processing; meanwhile, the coating operation and the blank leaving operation can also be circularly operated according to the actual processing requirement so as to meet the use and use requirements.

Specifically, the reflux pressures in the plurality of sets of reflux channels 4 are different. Different return channels 4 are opened by the control valve 5, so that the processing requirements of different blank sizes can be met.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. a coating device, is characterized in that, comprises:

a return valve (2), the return valve (2) is provided with a feed port (21) and a return port (22);

A coating valve (3), the feeding end of the coating valve (3) communicates with the discharging end of the return valve (2), and the coating valve (3) is provided with a discharging port (31) ;

A return passage (4), the return passage (4) communicates with the return port (22), the return passage (4) is provided with multiple groups, and the multiple groups of the return passages (4) are arranged in parallel, and the multiple groups are arranged in parallel. Diaphragm valves (41) are provided on the return passages (4);

a control valve (5), the control valve (5) is arranged on the return passage (4) to open or close multiple groups of the return passage (4);

A die head (6), the die head (6) communicates with the discharge port (31).

2 . The coating device according to claim 1 , characterized in that, there are two groups of the return passages ( 4 ). 3 .

3. The coating device according to claim 2, wherein the control valve (5) comprises a pneumatic three-way ball valve.

4 . The coating device according to claim 2 , wherein the control valve ( 5 ) is provided with two pieces, and the two pieces of the control valve ( 5 ) and the two sets of the return passages ( 4 ) are one by one. 5 . corresponding settings.

5 . The coating device according to claim 1 , further comprising a first pressure sensor ( 7 ), the first pressure sensor ( 7 ) being used to detect the cavity pressure in the die head ( 6 ). 6 . .

6 . The coating device according to claim 1 , further comprising a second pressure sensor ( 8 ), the second pressure sensor ( 8 ) being used to detect the return pressure of the return channel ( 4 ). 7 .

7 . The coating device according to claim 1 , further comprising a return pipe ( 9 ), the die head ( 6 ) is provided with a material return port, and the return pipe ( 9 ) is connected to the return pipe ( 9 ). The feed port is connected.

8. The coating device according to claim 1, wherein the return valve (2) and the coating valve (3) both comprise a valve body, a valve core and a linear motor, and the valve body is provided with a There is the return port (22)/the discharge port (31), the valve core is arranged in the valve body, and the linear motor is drivingly connected with the valve core to drive the valve core to open or close The return port (22) and the discharge port (31).

9. a coating technique, is characterized in that, comprises the steps:

Feeding operation: feed the slurry from the feed port (21);

Coating operation: close the return port (22), and open the discharge port (31), so that the slurry enters the die head (6) for the coating operation;

Blank operation: open the return port (22), close the discharge port (31), and open a preset set of return channels (4) or multiple sets of return channels (4) through the control valve (5), so that the The slurry flows into the storage tank.

10 . The coating device according to claim 9 , wherein the return pressures in the multiple groups of the return channels ( 4 ) are all different. 11 .