KR20230078243A - Electrode coating device - Google Patents

Abstract

The present invention relates to an electrode coating device, and more particularly, to an electrode coating device for forming an electrode layer at once by spraying and compressing an electrode electrode slurry on an upper portion of an electrode sheet being transferred using an upper stamp including a plurality of electrode slurry spray holes It is about.

Description

Electrode coating device {ELECTRODE COATING DEVICE}

The present invention relates to an electrode coating apparatus, and more particularly, to an electrode coating apparatus for forming an electrode layer at once by spraying and compressing an electrode electrode slurry on an upper part of an electrode sheet being transferred using a coater frame including a plurality of electrode slurry spray holes It is about.

Among secondary batteries, lithium secondary batteries are widely used in various fields requiring energy storage technology.

The manufacturing process of such a lithium secondary battery includes an electrode active material layer forming process of forming an electrode active material layer on an electrode current collector. The electrode active material layer forming process includes applying an active material electrode slurry in which electrode active material particles are mixed in a binder solution to an electrode current collector, and drying the active material electrode slurry applied to the electrode current collector to remove the solution and moisture present in the active material electrode slurry and forming an electrode active material layer on the electrode current collector by removing the.

1 schematically shows a process diagram for manufacturing a conventional electrode layer 31'. Referring to FIG. 1, the active material slurry 30' is coated on the electrode current collector 20' that is continuously supplied and transported from the supply roll 50' using the spray coating device 10', and dried An electrode including the electrode layer 31' is manufactured by using the apparatus 40' to dry the coated active material slurry 30'. The electrode current collector 20' including the electrode layer 31' manufactured in this way is wound up and recovered by the recovery roll 60'.

Here, the coating device 10' manufactures the electrode layer 31' by applying the active material slurry 30' to the coating area provided at predetermined intervals on the electrode current collector 20'.

Since the electrode current collector 20' is continuously moving in a predetermined process direction while the active material slurry 30' is applied in the coating device 10', the process speed is fast, but the entire coating area There is also a disadvantage that the active material slurry 30 'is not uniformly applied to the surface. Specifically, when the active material slurry 30' is applied, a loading amount of the active material slurry 30' in the edge portion B' of the coating area is extremely reduced.

Conventionally, in order to solve such a problem, there are cases in which an attempt is made to apply an additional active material electrode slurry by moving the coating device or the like horizontally in a manner of moving to a portion where the loading amount is reduced, but this is also an active material electrode slurry to the entire coating area There is a limit to adjusting the loading amount uniformly, and there is a problem that the efficiency of the process decreases due to irregular changes in the process time.

Korean Patent Registration No. 10-1877101

The present invention is to solve the problems of the prior art described above, to provide an electrode coating device having an improved structure so that non-uniformity in the coating thickness of the electrode slurry does not occur when the electrode slurry is coated on the electrode current collector There is a purpose.

In addition, an object of the present invention is to provide an electrode coating device that uniformly coats the electrode slurry on the coating area of the electrode current collector without delaying the process time.

According to the present invention, the coater frame is installed to be able to move up and down on the electrode sheet transported in a roll-to-roll state and has an electrode slurry storage space communicating with an electrode slurry supply source formed therein; and a slurry dispensing plate coupled to a lower portion of the coater frame and having a plurality of slurry dispensing holes arranged at regular intervals. And, the coater frame descends and injects the electrode slurry from the slurry spray hole in a state where the electrode sheet is spaced apart from the electrode sheet to collectively coat the electrode slurry in a predetermined area on the electrode sheet. Electrode coating device provides

Specifically, the area coated with the electrode slurry may not exceed the area of the slurry dispensing plate.

In addition, an electrode slurry tube connecting the electrode slurry storage space and an electrode slurry supply source and installed on the coater frame may be further included.

On the other hand, the electrode slurry pipe may be provided with a valve for adjusting the transfer amount of the electrode slurry.

According to an embodiment, the electrode sheet is stopped after moving a predetermined distance, and the coater frame descends when the electrode sheet is stopped to collectively coat the electrode slurry in a predetermined area.

On the other hand, the electrode coating device further includes a spraying control panel having a second spraying hole aligned to match the slurry spraying hole and slidably coupled to the slurry spraying plate, and according to the sliding movement of the spraying control panel When the slurry injection hole and the second injection hole are aligned in a line, electrode slurry is discharged from the slurry injection hole and the second injection hole, and when the second injection hole is not aligned with the slurry injection hole, discharge of the electrode slurry may be blocked.

Specifically, the coater frame may rise after discharge of the electrode slurry is blocked by sliding of the spray control panel.

According to another embodiment, in the electrode coating device, after spraying the electrode slurry through the slurry spray hole, the coater frame may further descend.

Meanwhile, the electrode coating apparatus may further include a support plate supporting the electrode sheet at a lower portion of the electrode sheet facing the coater frame.

According to the present invention, the coater frame is installed to be able to move up and down on the electrode sheet transported in a roll-to-roll state and has an electrode slurry storage space communicating with an electrode slurry supply source formed therein; and a slurry dispensing plate coupled to a lower portion of the coater frame and having a plurality of slurry dispensing holes arranged at regular intervals. And, in a state in which the coater frame descends and contacts the electrode sheet, the electrode slurry is sprayed from the slurry spray hole to collectively coat the electrode slurry in a predetermined area on the electrode sheet Provide an electrode coating device do.

On the other hand, the electrode coating device further includes a spraying control panel having a second spraying hole aligned to match the slurry spraying hole and slidably coupled to the slurry spraying plate, and according to the sliding movement of the spraying control panel When the slurry injection hole and the second injection hole are aligned in a line, electrode slurry is discharged from the slurry injection hole and the second injection hole, and when the second injection hole is not aligned with the slurry injection hole, discharge of the electrode slurry may be blocked.

According to one embodiment, the coater frame may rise after discharging of the electrode slurry is blocked by sliding of the spray control panel.

According to the present invention, when the electrode layer is formed by applying the electrode electrode slurry to the entire coating area of the current collector, the electrode layer having a uniform thickness in all areas can be manufactured.

In addition, the present invention has the effect of increasing the efficiency of the process by uniformly applying the electrode slurry and not performing additional follow-up work to adjust the loading amount of the electrode slurry.

1 is a process chart for a conventional electrode active material layer manufacturing process.
Figure 2 shows the configuration of the electrode coating device of the present invention.
3 is a modification of the slurry tube of the present invention.
4 is a perspective view and a rear view of a coater frame and an electrode slurry dispensing plate included in the electrode coating apparatus of the present invention.
5 shows a coater frame of the present invention and an electrode layer manufactured by the coater frame.
6 shows the operation of the electrode coating device according to the first embodiment of the present invention.
Figure 7 shows the operation of the electrode coating device having the structure of Figure 4.
8 shows a control diagram for the electrode coating device of the present invention.
9 is a perspective view of the injection control panel of the present invention.
10 is a cross-sectional view of a coater frame to which a spray control panel is applied.
11 shows the operation of the injection control panel.
12 shows a control diagram for the electrode coating device and the spray control panel of the present invention.
13 shows an example in which a support plate is applied.
14 shows the operation of the electrode coating device according to the second embodiment of the present invention.

Hereinafter, detailed configurations of the present invention will be described in detail with reference to the accompanying drawings and various embodiments. The embodiments described below are shown by way of example to help understanding of the present invention, and the accompanying drawings are not drawn to scale and the dimensions of some components may be exaggerated to help understanding of the present invention. .

Since the present invention may have various changes and various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, it should be understood that this is not intended to limit the present invention to the specific disclosed form, and includes all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

The present invention relates to an electrode coating device 100 for forming an electrode layer 210 by applying the electrode slurry 200 on an upper portion of an electrode sheet 300 transported in a roll-to-roll state, and more specifically, a plurality of electrode slurries 200 ) Electrode coating device for forming the electrode layer 210 at once by spraying or compressing the electrode electrode slurry 200 on the upper part of the electrode sheet 300 being transported using the coater frame 110 including the spray hole 121 ( 100) is about.

Figure 2 shows the configuration of the electrode coating device 100 of the present invention.

Referring to FIG. 2, the coater frame 110 is installed to be able to move up and down on the electrode sheet 300 transported in a roll-to-roll state, and the storage space for the electrode slurry 200 communicating with the slurry supply source 140 is provided inside. It can be seen that it contains In addition, it can be seen that a slurry dispensing plate 120 having a plurality of electrode slurry 200 dispensing holes 121 arranged at regular intervals is coupled to the lower portion of the coater frame 110 .

The electrode slurry 200 transferred from the slurry supply source 140 through the slurry pipe 150 may be temporarily stored in the slurry storage space 111 in the coater frame 110 . The electrode slurry 200 stored in the slurry storage space 111 may be ejected to the outside through the slurry spray hole 121 when pressure is applied. At this time, the pressure may be applied by a pump (not shown) installed in the slurry source 140 or the slurry pipe 150, but the present invention is not specifically limited thereto.

It can be seen that the electrode layer 210 is formed on the electrode sheet 300 by the coater frame 110 moving up and down on the electrode sheet 300 .

The coater frame 110 is connected to a servomotor (not shown) and a shaft (not shown) and can move up and down by the operation of the servomotor, but the operation method of the coater frame 110 does not need to be limited by this. does not exist. However, any operation method capable of lifting the coater frame 110 without interfering with spraying of the electrode slurry 200 through the coater frame 110 can be used.

When spraying the electrode slurry 200 onto the electrode sheet 300, the coater frame 110 may adjust the spray amount of the electrode slurry 200. Specifically, the injection amount of the electrode slurry 200 can be adjusted through a valve 151 or the like, and the valve 151 can be installed in the slurry pipe 150 . That is, the transfer amount of the electrode slurry 200 transferred through the slurry tube 150 is controlled through the valve 151 installed in the slurry tube 150, and the injection amount is also adjusted by adjusting the transfer amount of the electrode slurry 200 this becomes possible

In the electrode coating device 100 of the present invention, one coater frame 110 may be connected to the slurry supply source 140 through one slurry tube 150, but the above through a plurality of slurry tubes 150 as necessary. A slurry source 140 may also be connected.

3 shows a modification of the slurry tube 150 of the present invention.

Referring to FIG. 3, it can be seen that a plurality of slurry tubes 150 are connected to one coater frame 110. In addition, a valve 151 capable of adjusting the amount of the electrode slurry 200 transferred through the corresponding slurry tube 150 may be installed in each slurry tube 150 .

Each of the slurry tubes 150 may be connected to at least one slurry injection hole 121, and the injection and injection amount of the electrode slurry 200 injected through each slurry injection hole 121 by adjusting the valve 151 It becomes possible to control the back.

Through the connection structure of the slurry tube 150 as described above, it is possible to control the size of the area of the electrode layer 210 formed on the electrode sheet 300, and also to control the shape of the electrode layer 210. In addition, the injection amount of the electrode slurry 200 in the region where the loading amount of the electrode slurry 200 is chronically low in the electrode layer 210 is increased, or conversely, the amount of electrode slurry 200 injected in the region where the loading amount of the electrode slurry 200 is high is reduced. It is also possible. Furthermore, it may also be possible to form a plurality of electrode layers 210 on one electrode sheet 300 at once. Specifically, by individually adjusting the valves 151 installed in each of the slurry tubes 150, movement of the electrode slurry 200 to a portion of the slurry injection hole 121 connected to the corresponding slurry tube 150 may be blocked. That is, the injection of the electrode slurry 200 through the slurry injection hole 121 can be blocked.

As described above, through the configuration of the plurality of slurry spray holes 121, the plurality of slurry tubes 150, and the valve 151, it is possible to manufacture electrode layers 210 having various shapes and sizes, and also spaced electrode layers 210 ) It becomes possible to manufacture a plurality at once.

4 is a perspective view and a rear view of the coater frame 110 and the slurry dispensing plate 120 included in the electrode coating device 100 of the present invention.

Referring to FIG. 4 (a), an example of the external shape of the coater frame 110 is shown. However, the coater frame 110 of the present invention does not have to be limited by FIG. 4 (a), and includes a slurry storage space 111 capable of storing the electrode slurry 200 therein, and the electrode sheet 300 ), a shape capable of providing a lower portion of the slurry dispensing plate 120 sufficient to form a large area of the electrode layer 210 at once is sufficient.

Referring to FIG. 4(b), it can be seen that the slurry dispensing plate 120 including a plurality of slurry dispensing holes 121 is provided at the bottom of the coater frame 110. The slurry dispensing plate 120 may be mounted under the coater frame 110 as a separate structure, or may be designed integrally with the coater frame 110 .

The slurry spraying hole 121 may be formed while maintaining a constant arrangement in the horizontal and vertical directions of the slurry spraying plate 120, but is not limited thereto and may be formed randomly. However, since the outermost slurry spraying holes 121 located on the rim of the slurry spraying plate 120 are directly involved in the appearance of the electrode layer 210 formed of the electrode slurry 200 to be sprayed, the outermost slurry portion The position of the hole 121 should be arranged considering the area and shape of the target electrode layer 210 .

The distance between adjacent slurry spray holes 121 is the degree to which the electrode slurries 200 sprayed from each slurry spray hole 121 can be connected to each other on the electrode sheet 300 to form one electrode layer 210. should be designed with this in mind. For example, if the separation distance of the slurry injection hole 121 becomes too far, the electrode slurry 200 may be injected relatively less than the distance, and as a result, the manufactured electrode layer 210 is The loading amount of the electrode slurry 200 may be different.

The opened shape of the slurry spraying hole 121 may be circular or polygonal, but is not particularly limited thereto in the present invention. That is, as long as the electrode layer 210 can be completely formed on the electrode sheet 300 through one operation of the coater frame 110, the slurry spray hole 121 of any shape can be designed.

The electrode coating device 100 of the present invention is characterized in that the electrode layer 210 is formed so that the loading amount of the electrode slurry 200 is uniform throughout the coating area 310 set on the electrode sheet 300.

5 shows the coater frame 110 and the electrode layer 210 manufactured by the coater frame 110 of the present invention.

Referring to FIG. 5, the coater frame 110 is located on top of the electrode sheet 300 that is transported in one direction, and when the preset coating area 310 is placed in place, the electrode slurry ( 200) to form the electrode layer 210 having a predetermined area. At this time, it is preferable that the area on which the electrode slurry 200 is coated does not exceed the area of the slurry dispensing plate 120 .

The method of forming the electrode layer 210 by spraying the electrode slurry 200 on the electrode sheet 300 by the electrode coating device 100 of the present invention can be largely divided into two methods.

That is, the coater frame 110 sprays the electrode slurry 200 through the slurry spray hole 121 while being spaced apart from the electrode sheet 300 by a predetermined distance, and then sprays the electrode slurry 200 onto the electrode sheet 300 with the coater frame 110. The sprayed electrode slurry 200 may be compressed, or the electrode slurry 200 may be sprayed through the slurry spray hole 121 while the electrode sheet 300 is pressed with the coater frame 110 .

Hereinafter, two embodiments will be described as examples.

(First Embodiment)

The electrode coating device 100 of the present invention sprays the electrode slurry 200 from the electrode slurry 200 injection hole 121 in a state where the coater frame 110 descends and is spaced apart from the electrode sheet 300 at a predetermined interval. The electrode slurry 200 may be collectively coated on the electrode sheet 300 in a predetermined area.

6 shows the operation of the electrode coating device 100 according to the first embodiment of the present invention.

Referring to FIG. 6, the transport of the electrode sheet 300 is stopped when the coating area 310 on which the electrode layer 210 is to be formed is placed in the correct position under the coater frame 110 (FIG. 6( a)). Then, the coater frame 110 moves downward toward the coating area 310 (FIG. 6(b)), and when the coater frame 110 is spaced apart from the electrode sheet 300 by a certain distance, the slurry tube ( When the valve 151 installed in 150 is opened, the electrode slurry 200 is sprayed onto the electrode sheet 300 through the slurry spray hole 121 (FIG. 6(c)). Thereafter, the coater frame 110 moves downward again and presses the electrode slurry 200 applied to the electrode sheet 300 to manufacture the electrode layer 210 (FIG. 6(d)). At this time, the loading amount of the electrode slurry 200 applied on the electrode sheet 300 may be adjusted uniformly over the entire coating area 310 by compression of the coater frame 110 . Then, the coater frame 110 rises again (FIG. 6(e)), and the electrode sheet 300 is transported again.

As described above in FIGS. 5 and 6 , the electrode sheet 300 is stopped after moving a predetermined distance, and the coater frame 110 descends when the electrode sheet 300 is stopped to form the electrode slurry 200 is collectively coated in a predetermined area.

FIG. 7 shows the operation of the electrode coating device 100 having the structure of FIG. 3 .

Referring to FIG. 7, by blocking the transfer of the electrode slurry 200 through the slurry tube 150 of some of the slurry tubes 150, the electrode slurry 200 is spaced apart at a predetermined interval through the slurry spray hole 121 It can be seen that it was adjusted to be sprayed in the state. It can be seen that the electrode layer 210 having a relatively small area is formed compared to FIG. 6 . That is, it can be seen that a plurality of electrode layers 210 are manufactured on the electrode sheet 300 by one operation of the coater frame 110 .

The electrode sheet 300 of the present invention is supplied from a supply roller and wound up by a recovery roll 500. The electrode sheet 300 may be transported by the supply roll 400 and the recovery roll 500. That is, the electrode sheet 300 is affected by tension generated by a difference in rotation speed between the supply roll 400 and the recovery roll 500 and the speed at which the recovery roll 500 winds the electrode sheet 300. can be transported At this time, when the rotational speed of the recovery roll 500, that is, the winding speed of the electrode sheet 300 increases, the transfer speed of the electrode sheet 300 may increase, and when the recovery roll 500 stops rotating, the The movement of the electrode sheet 300 may also be stopped.

The operation of the electrode coating device 100 of the present invention can be controlled according to the transport speed of the electrode sheet 300 and the stopping interval.

8 shows a control diagram for the electrode coating device 100 of the present invention.

Referring to FIG. 8, the control unit is electrically connected to each component of the supply roll 400, the recovery roll 500, and the electrode coating device 100 to control all processes of manufacturing the electrode layer 210. Specifically, the control unit may control the operation of the valve 151 of the electrode coating device 100 and the elevation of the coater frame 110 .

When the coating area 310 of the electrode sheet 300 is positioned above the coater frame 110, the control unit stops the rotation of the recovery roll 500 to stop the movement of the electrode sheet 300. (At this time, the speed of the supply roll 400 may be continuously controlled by the control unit so that the electrode sheet 300 maintains a constant tension, and from now on, for convenience of understanding, description of the supply roll 400 will be excluded. After), a servo motor (not shown) connected to the coater frame 110 is operated to elevate the coater frame 110, and when the coater frame 110 reaches a desired position, the coater frame ( 110) is stopped. Thereafter, the control unit opens the valve 151 to transfer and spray a desired amount of the electrode slurry 200 .

The coating device of the present invention may further include a spray control panel 130 capable of adjusting the final spray amount of the electrode slurry 200.

9 shows a perspective view of the injection control panel 130.

Referring to FIG. 9 , it can be seen that the injection control panel 130 has a flat plate shape and includes a plurality of open second injection holes 131 .

Guide members 132 extending in the lateral direction may be further provided on both sides of the injection control panel 130 . One end of the guide member 132 may be connected to the spray control panel 130, and the other end may be coupled to a driving device 133 capable of moving the spray control panel 130 in a horizontal direction.

10 is a cross-sectional view of the coater frame 110 to which the spray control panel 130 is applied.

Referring to FIG. 10 , it can be seen that the spray control panel 130 is slidably coupled to the inside of the corner frame, that is, to the top of the slurry spray plate 120 .

Specifically, the spraying control panel 130 having second spraying holes 131 arranged to match each slurry spraying hole 121 arranged on the slurry spraying plate 120 is formed, and the slurry is sprayed from the top of the slurry spraying plate 120 It can be seen that it is coupled to be slidable with respect to the plate 120.

The guide member 132 connected to the injection control panel 130 is connected to a driving device 133 that provides a driving force for sliding the injection control panel 130 in a horizontal direction. The spraying control panel 130 can be moved relative to the slurry dispensing plate 120 by the operation of the driving device 133 .

The driving device 133 may be coupled to and fixed to the coater frame 110 so as to move in line with the coater frame 110 . 10 shows that the driving device 133 is coupled to the outside of the coater frame 110, but it is not necessary to be limited thereto, and the driving device 133 may be located inside the coater frame 110. there is.

11 shows the operation of the injection control panel 130.

Referring to FIG. 11 (a), the spraying control panel 130 is slid so that the second spraying hole 131 of the spraying control panel 130 and the slurry spraying hole 121 of the slurry spraying plate 120 coincide. Able to know. At this time, the electrode slurry 200 may be sprayed to the outside through the second spray hole 131 and the slurry spray hole 121 . That is, when the slurry injection hole 121 and the second injection hole 131 are aligned in a line, the electrode slurry 200 may be discharged from the slurry injection hole 121 and the second injection hole 131 .

Conversely, referring to FIG. 11 (b), the spray control panel 130 is slid so that the second spray hole 131 of the spray control panel 130 and the slurry spray hole 121 of the slurry spray plate 120 do not match. can know that At this time, the electrode slurry 200 is blocked by the spray control panel 130 and is not sprayed to the outside. That is, when the second spraying hole 131 is not aligned with the slurry spraying hole 121, the discharge of the electrode slurry 200 may be blocked.

The spray control panel 130 may control whether or not to spray the electrode slurry 200, but after the spray is finished, the excess electrode slurry 200 remaining in the slurry storage space 111 of the coater frame 110 It also has the purpose of preventing leakage to the outside through the slurry injection hole 121.

12 shows a control diagram for the electrode coating device 100 and the recovery roll 500 when the spray control panel 130 is applied.

Referring to FIG. 12, the control unit C is electrically connected to each component of the supply roll 400, the recovery roll 500, and the electrode coating device 100 to control all processes of manufacturing the electrode layer 210. do. Specifically, the controller C may control the operation of the valve 151 of the electrode coating device 100, the sliding of the spray control panel 130, and the elevation of the coater frame 110.

When the coating area 310 of the electrode sheet 300 is positioned above the coater frame 110, the control unit C stops the rotation of the recovery roll 500 to stop the movement of the electrode sheet 300. Thereafter, a servomotor (not shown) connected to the coater frame 110 is operated to lower the coater frame 110, and when the coater frame 110 reaches a desired position, the coater frame 110 stop the movement of Thereafter, the control unit C opens the valve 151 to transfer a desired amount of electrode slurry 200 to the slurry storage space 111 to prepare for injection. Thereafter, the control unit C operates the driving device 133 so that the second spraying hole of the spraying control panel 130 coincides with the slurry spraying hole 121 of the slurry spraying plate 120 to slide the spraying control panel 130 While moving, the electrode slurry 200 is sprayed. After forming the electrode layer 210 on the electrode sheet 300, the control unit C operates the driving device 133 again to return the spray control panel 130 to its original position. As described above, when the spraying control panel 130 is returned to its original position, the slurry spraying hole 121 of the slurry spraying plate 120 is blocked, so that the discharge of the electrode slurry 200 through the slurry spraying hole 121 is blocked. Finally, after the discharge of the electrode slurry 200 is blocked, the control unit C raises the coater frame 110 .

The electrode coating device 100 of the present invention may further include a support plate 160 supporting the electrode sheet 300 .

13 shows an example in which the support plate 160 is applied.

Referring to FIG. 13, the electrode coating apparatus 100 of the present invention further includes a support plate 160 supporting the electrode sheet 300 at a position facing the coater frame 110 at the lower part of the electrode sheet 300. It can be seen that it is available. That is, by the configuration of the electrode coating device 100 as described above, the electrode sheet 300 is transferred while being interposed between the coater frame 110 and the support plate 160, and the coater frame 110 and the support plate 160 ), the upper and lower surfaces may be compressed.

The upper surface of the support plate 160 is flat and is preferably level with the electrode sheet 300 or the slurry dispensing plate 120 of the coater frame 110. If the upper surface of the support plate 160 is not level with the coater frame 110 or the electrode sheet 300, there is a risk that the electrode sheet 300 may be damaged due to compression of the stamp.

In addition, the area of the support plate 160 is preferably equal to or larger than the area of the slurry dispensing plate 120 . This is because when the coater frame 110 descends in the direction of the electrode sheet 300 and presses the upper surface of the electrode sheet 300 with the slurry dispensing plate 120, all parts of the electrode sheet 300 being pressed This is to fully support the support plate 160.

(Second Embodiment)

The electrode coating device 100 of the present invention sprays the electrode slurry 200 from the slurry spray hole 121 in a state in which the coater frame 110 descends and contacts the electrode sheet 300, thereby forming the electrode sheet 300 The electrode slurry 200 may be collectively coated on a predetermined area.

14 shows the operation of the electrode coating device 100 according to the second embodiment of the present invention.

Referring to FIG. 14, the coater frame 110 (FIG. 14(a)) spaced a certain distance from the electrode sheet 300 moves downward toward the coating area 310 (FIG. 14(b) ), when the coater frame 110 contacts the electrode sheet 300, the valve 151 installed in the slurry pipe 150 opens, so that the electrode slurry 200 passes through the slurry spray hole 121 to the electrode sheet 300 The electrode layer 210 is manufactured by spraying on it (FIG. 14(c)). Then, the coater frame 110 moves upward again (FIG. 14(d)).

Unlike the first embodiment, the second embodiment sprays the electrode slurry 200 while the coater frame 110 is in contact with the coating area 310 of the electrode sheet 300, so the accuracy is further increased. characteristic.

In the above, the present invention has been described in more detail through drawings and examples. However, since the configurations described in the drawings or embodiments described in this specification are only one embodiment of the present invention and do not represent all of the technical spirit of the present invention, various equivalents and It should be understood that variations may exist.

10': (prior art) coating device
20 ': (prior art) electrode current collector
30': (prior art) active material slurry
31 ': (prior art) electrode layer
40': (prior art) drying device
50': (prior art) supply roll
60': (prior art) recovery roll
B': (prior art) frame
100: electrode coating device
110: coater frame
111: slurry storage space
120: slurry spraying plate
121: slurry injection hole
130: injection control panel
131: second injection hole
132: guide member
133: driving device
140: slurry source
150: slurry pipe
151: valve
160: support plate
200: electrode slurry
210: electrode layer
300: electrode sheet
310: coating area
400: supply roll
500: recovery roll
C: control part

Claims (12)

A coater frame installed to be liftable on top of an electrode sheet transported in a roll-to-roll state and having an electrode slurry storage space communicating with an electrode slurry supply source formed therein; and
a slurry dispensing plate coupled to a lower portion of the coater frame and having a plurality of slurry dispensing holes arranged at regular intervals; including,
Electrode coating device for spraying the electrode slurry from the slurry spraying hole in a state where the coater frame descends and is spaced apart from the electrode sheet at a predetermined distance to collectively coat the electrode slurry in a predetermined area on the electrode sheet. According to claim 1,
An electrode coating device in which the area on which the electrode slurry is coated does not exceed the area of the slurry dispensing plate. According to claim 1,
Electrode coating device further comprising an electrode slurry tube connected to the electrode slurry storage space and an electrode slurry supply source and installed on the coater frame. According to claim 3,
The electrode coating device is provided with a valve for adjusting the electrode slurry transfer amount in the electrode slurry tube. According to claim 1,
The electrode sheet is stopped after moving a predetermined distance, and the coater frame descends when the electrode sheet is stopped to collectively coat the electrode slurry in a predetermined area. According to claim 1,
The electrode coating device further includes a spraying control panel having a second spraying hole aligned to match the slurry spraying hole and slidably coupled to the slurry spraying plate,
When the slurry injection hole and the second injection hole are aligned in a line according to the sliding movement of the injection control panel Electrode When the slurry is discharged from the slurry injection hole and the second injection hole and the second injection hole is not aligned with the slurry injection hole Electrode Electrode coating device, characterized in that the discharge of the slurry is blocked. According to claim 6,
The electrode coating device in which the coater frame rises after the discharge of the electrode slurry is blocked by the sliding of the spray control panel. According to claim 1,
The electrode coating device is an electrode coating device in which the electrode slurry is sprayed through the slurry spray hole, and then the coater frame is further lowered to compress the electrode sheet. According to claim 1,
The electrode coating device further comprises a support plate supporting the electrode sheet at a lower portion of the electrode sheet facing the coater frame. A coater frame installed to be liftable on top of an electrode sheet transported in a roll-to-roll state and having an electrode slurry storage space communicating with an electrode slurry supply source formed therein; and
a slurry dispensing plate coupled to a lower portion of the coater frame and having a plurality of slurry dispensing holes arranged at regular intervals; including,
Electrode coating device for spraying the electrode slurry from the slurry injection hole in a state in which the coater frame descends and contacts the electrode sheet to collectively coat the electrode slurry in a predetermined area on the electrode sheet. According to claim 10,
The electrode coating device further includes a spraying control panel having a second spraying hole aligned to match the slurry spraying hole and slidably coupled to the slurry spraying plate,
When the slurry injection hole and the second injection hole are aligned in a line according to the sliding movement of the injection control panel Electrode When the slurry is discharged from the slurry injection hole and the second injection hole and the second injection hole is not aligned with the slurry injection hole Electrode Electrode coating device, characterized in that the discharge of the slurry is blocked. According to claim 11,
The electrode coating device, wherein the coater frame rises after discharge of the electrode slurry is blocked by sliding of the spray control panel.

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