KR20230044623A - Electrode drying apparatus - Google Patents

Abstract

The present invention relates to an electrode drying apparatus. The electrode drying apparatus heating and drying an electrode for a battery of the present invention comprises: a heating chamber in which the electrode travels in a roll-to-roll status; a plurality of direction change rollers disposed within the heating chamber and changing the direction of the traveling electrode; and a pair of heating members including a first heating member disposed opposite to the surface of the electrode to heat the electrode surface, and a second heating member disposed to face the rear surface of the electrode to heat the electrode surface. One of the first and second heating members is installed to be movable with respect to the electrode. Provided is the electrode drying apparatus which can quickly discharge a residual heat in the heating chamber.

Description

Electrode drying apparatus

The present invention relates to an electrode drying device. Specifically, the present invention relates to an electrode drying apparatus capable of removing residual heat inside a heating chamber for drying electrodes.

More specifically, the present invention relates to an electrode drying device capable of reducing the output of a heating member and preventing overdrying by increasing a driving drying path while removing internal residual heat.

A secondary battery includes an electrode assembly having a laminated structure of a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode.

1 is a schematic diagram showing a conventional notching and electrode drying system of a secondary battery, and FIG. 2 is a diagram showing a heating unit in the system of FIG. 1 .

As shown in FIG. 1, the conventional notching and electrode drying system of a secondary battery includes a notching unit 100' for notching an electrode 10' and an electrode 10' processed by the notching unit 100'. and a heating unit 200' for drying and a recovery unit 300' for recovering the heated electrode 10'. Reference numeral 110' denotes an unwinder unit, 120' a film feeder unit, 130' a notching processing unit forming an electrode pattern, and 140' a vision inspection unit photographing and inspecting the electrode.

As shown in FIG. 2, the heating unit 200' transfers the electrode 10' passing through the inlet portion 212' through the roller 231 and simultaneously heats both sides of the electrode 10'. A plurality of paired heating members 220' are disposed along the three walls of the main body 210'. The interior of the heating body 210' provides a chamber 250'. The first heating set 221' and the second heating set 222' are provided on the wall of the inlet 212', and the third heating set 223' and the fourth heating set are placed on the wall of the outlet 213'. 224') and a fifth heating set 225' and a sixth heating set 226' are disposed on the upper wall surface. The electrode 10' passing through the heating set passes through the outlet part 213' and is wound around a rewinder 302' rotating around a shaft 303'. The heating member 220' sprays hot air or irradiates infrared rays (IR). Reference numeral 240' is a shelf supporting a part of the heating set.

However, the prior art has the following problems.

First, when the equipment is stopped, the electrode is overdried due to residual heat inside the heating unit (heating chamber). Specifically, there is a problem in that residual heat is not completely discharged due to excessive radiant heat in the chamber, so that thermal shock continuously occurs in the electrodes in the chamber.

Second, as the driving speed of the electrode increases gradually to improve productivity, the output of the heating member (eg, infrared (IR) unit) is increased, and there are problems such as over-drying of the electrode and damage to the cable due to the excessive output of the heating member.

Korean Patent Publication No. 10-2019-0087157

The present invention has been made to solve the above problems, by installing a heating member disposed on one side of a heating member for heating both sides of an electrode to be movable with respect to the electrode, through a space in which the heating member moves, in the heating chamber. It is to provide an electrode drying device capable of quickly discharging residual heat.

In addition, another object of the present invention is to provide an electrode drying apparatus capable of reducing the output of a heating member by increasing the traveling path of the electrode in the heating chamber to increase the traveling drying path of the electrode.

An electrode drying apparatus for heating and drying battery electrodes of the present invention includes a heating chamber in which electrodes travel in a roll-to-roll state; a plurality of direction changing rollers disposed in the heating chamber and changing the direction of the traveling electrode; And a pair of heating members consisting of a first heating member disposed opposite to the surface of the electrode to heat the electrode surface and a second heating member disposed opposite to the back surface of the electrode to heat the back surface of the electrode, wherein the One of the first and second heating members is characterized in that it is installed to be movable with respect to the electrode.

As an example, the plurality of direction changing rollers are disposed so that the horizontal and vertical traveling portions have electrode travel paths alternately formed, and the pair of heating members are disposed on at least one of the horizontal and vertical traveling portions. can be installed

Specifically, one of the first heating member and the second heating member disposed on the surface and back surface of the horizontal running part of the electrode is installed to be movable in the vertical direction with respect to the electrode of the horizontal running part, and the surface and back surface of the vertical running part of the electrode One of the first heating member and the second heating member disposed on may be installed to be movable in a horizontal direction with respect to the electrode of the vertical traveling part.

As a specific example, one of the first heating member and the second heating member disposed on the surface and the back surface of the vertical traveling part of the electrode may be installed to be movable in a left-right direction or a front-back direction with respect to the electrode of the vertical traveling part.

As an embodiment of the present invention, two vertical traveling parts located on both sides of one horizontal traveling part extend in the same direction in an upward or downward direction based on the horizontal traveling part, so that the horizontal traveling part and the two vertical traveling parts are upwardly looped. A loop or a downward loop type of electrode travel path may be formed.

As a specific example, the electrode travel path includes one up loop or one down loop, and the horizontal travel portion extending from the electrode inlet of the heating chamber at both ends of the vertical travel portion constituting the up loop or down loop and the heating chamber. The electrode traveling paths may be formed such that the horizontal traveling parts extending to the electrode outlets are connected to each other.

As a more specific example, a first heating member and a second heating member for heating the surface and the back surface of the horizontal traveling portion electrode are disposed on the upper and lower portions of the horizontal traveling portion forming the upward loop or the downward loop, respectively, and the upward loop or downward A first heating member and a second heating member for heating the surface and back surface of the vertical traveling portion electrode are disposed on the left and right sides of the vertical traveling portion forming the loop, respectively, and the outer and lower sides of the up loop or down loop among the first and second heating members Heating members disposed on one of the inner sides may be movably installed with respect to the electrode, and heating members disposed on the other one of the outer and inner sides of the upper loop or the lower loop may be fixedly installed with respect to the electrode.

As an example, a heating member disposed outside the up loop or down loop among heating members for heating the horizontal running portion, and a heating member disposed outside the up loop or down loop among heating members for heating the vertical running portion. The members may be moved in a direction perpendicular to each other.

Here, the heating members disposed inside the upper loop or the lower loop may be fixed to a common frame.

As another embodiment of the present invention, the up loop and the down loop may share one vertical travel part and have alternately repeated electrode travel paths.

As a specific example of this, in the heating chamber, a first loop forming a central upward loop or downward loop; a second loop sharing one vertical traveling portion with the first loop on one of the left and right sides of the first loop and forming a downward or upward loop in which a vertical extending direction is opposite to that of the first loop; and three loops of a second loop sharing one vertical traveling portion with the first loop on the other side of the left and right sides of the first loop and forming a downward or upward loop in which the vertical extension direction is opposite to that of the first loop. An electrode travel path may be formed.

As an example, the second loop and the third loop may be symmetrically disposed around the first loop.

As a specific example, a first heating member and a second heating member for heating the surface and the back surface of the horizontal traveling portion electrode are disposed above and below at least one electrode of the horizontal traveling portions forming the first to third loops, respectively. And, a first heating member and a second heating member for heating the surface and the back of the vertical traveling portion electrode may be respectively disposed on the left and right sides of at least one electrode of the vertical traveling portions forming the first to third loops.

As an example, the heating members disposed outside the second and third loops are movably disposed with respect to the electrodes, and the heating members disposed inside the second and third loops are fixedly installed with respect to the electrodes. can

As another example, the heating members disposed inside the second and third loops may be movably disposed with respect to the electrodes, and the heating members disposed outside the second and third loops may be fixedly installed with respect to the electrodes. there is.

According to the present invention, since residual heat in the heating chamber can be quickly discharged through the space where the heating member has moved, overdrying of the electrode due to residual heat can be prevented.

In addition, since the drying travel path in the heating chamber can be increased and more heating members can be disposed, the problem of quality deterioration due to excessive heating and drying of the electrode can be solved by lowering the output of the heating source (heating member). there is.

In addition, according to the present invention, layout improvement is easy, space utilization is efficient, and since the shapes of the frames in which the electrodes are installed are similar, the design and production of the members are easy.

1 is a schematic diagram showing a notching and electrode drying system of a conventional secondary battery.
2 is a diagram showing a heating unit in the system of FIG. 1;
3 is a perspective view showing an embodiment of the electrode drying apparatus of the present invention.
4 and 5 are perspective views illustrating the operation of the electrode drying apparatus of FIG. 3 .
6 and 7 are schematic views of main parts of the embodiment of FIG. 3 and schematic views of main parts of a modified example of the embodiment of FIG. 3 .
8 is a schematic view of main parts of another embodiment of the electrode drying apparatus of the present invention.
Fig. 9 is a schematic diagram of main parts of a modified example of the embodiment shown in Fig. 7;
Fig. 10 is a perspective view of the embodiment of Fig. 8;
11 and 12 are perspective views illustrating the operation of the electrode drying apparatus of FIG. 8 .

Hereinafter, the present invention will be described in detail. Prior to this, terms or words used in this specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventor appropriately uses the concept of terms in order to describe his/her invention in the best way. It should be interpreted as a meaning and concept consistent with the technical spirit of the present invention based on the principle that it can be defined in the following way.

In the present invention, terms such as "comprise" or "having" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof. In addition, when a part is said to be "connected" to another part, it includes being physically connected directly or indirectly.

In the present invention, terms such as "upper" or "lower" "front" or "rear" or "arrangement" or "arrangement" are not meant to be limiting and should be interpreted as exemplifying words indicating positions or orientations.

Hereinafter, the present invention will be described in detail.

(First Embodiment)

First, the electrode drying apparatus 100 according to the first embodiment of the present invention will be described.

An electrode drying apparatus 100 for heating and drying battery electrodes of the present invention includes a heating chamber 10 in which an electrode 1 travels in a roll-to-roll state; a plurality of direction changing rollers 20 disposed in the heating chamber 10 and changing the direction of the traveling electrode 1; And a first heating member disposed opposite to the surface of the electrode 1 to heat the electrode surface F, and disposed opposite to the back surface B of the electrode 1 to heat the back surface B of the electrode It includes a pair of heating members 30 made of a first heating member 32, wherein one of the first and first heating members 31 and 32 is installed to be movable relative to the electrode 1 do.

The conventional electrode heating apparatus shown in FIGS. 1 and 2 includes a heating member for heating and drying the electrodes on both surfaces of the front surface (F) and the back surface (B) of the electrode. However, the heating member is fixed to the inner wall or frame of the heating chamber and is thus immovable. In this way, since the heating member is fixedly disposed on both sides of the electrode, it is difficult to discharge residual heat or excessive radiant heat from the electrode when the operation of the heating device is stopped or when the electrode is excessively overdried due to excessive power during operation of the device. it was structured

In contrast, in the electrode drying apparatus 100 of the present invention, one of the first and second heating members 31 and 32 for heating the surface F and the back surface B of the electrode 1 is applied to the electrode 1. It is characterized in that it is installed to be movable with respect to. Therefore, the electrode drying apparatus 100 of the present invention can move one of the first and second heating members 31 and 32 away from the electrode 1 when the operation is stopped, and accordingly, the inside of the heating chamber 10 Residual heat can be quickly discharged to the spaced space in which the heating member is spaced apart.

3 is a perspective view showing an embodiment of an electrode drying apparatus 100 of the present invention.

In FIG. 3 , the X axis represents the horizontal direction, the Y axis represents the vertical (up and down) direction, and the Z axis represents the forward and backward directions. The X-axis direction and the Z-axis direction are horizontal to the Y-axis.

The electrode drying apparatus 100 of the present invention includes a heating chamber 10, a direction changing roller 20, and a pair of heating members 30 composed of first and second heating members 31 and 32.

The heating chamber 10 is a space for heating and drying the electrode 1 in which the electrode 1, the heating member 30 and the direction changing roller 20 are embedded. In FIG. 3 , a chamber wall 11 is shown and the interior of said chamber wall 11 becomes a heating chamber 10 . For convenience of illustration, the chamber wall 11 on the front surface of the heating chamber 10 is omitted from the illustration, but the chamber wall 11 is also formed on the front surface of the heating chamber 10, and thus the heating chamber 10 A closed heating and drying space is formed. An entrance door (not shown) may be formed on one side of the chamber wall 11 to enter the heating chamber 10 or perform maintenance of equipment. In the heating chamber 10, an electrode inlet through which the electrode 1 is introduced and an electrode outlet 11b through which the dried electrode is discharged are formed. In FIG. 3, the electrode inlet 11a and the electrode outlet 11b are formed on the lower side of the heating chamber 10, but the electrode inlet 11a and the electrode outlet 11b are formed on the upper side of the heating chamber 10. may be formed, and the formation positions of the electrode inlet 11a and the electrode outlet 11b are not limited thereto. However, when considering the heating member in the heating chamber 10, the frame supporting the heating member, the arrangement relationship of the driving unit for driving the frame, and the connection relationship with other devices outside the heating chamber 10, the heating chamber ( 10), it is preferable that the electrode 1 is transported along a symmetrically shaped travel path. Therefore, it may be desirable to form the electrode inlet 11a and the electrode outlet 11b to face and align with each other on both sides of the upper or lower portion of the heating chamber wall 11 so as to conform to the symmetrical electrode traveling path. there is.

The electrode 1 of the present invention is driven in a roll-to-roll state in the heating chamber 10 . That is, the electrode 1 is transported in a roll-to-roll state along a predetermined travel path while being supported and changed in direction by a plurality of direction changing rollers 20 . In addition, predetermined unwinders and rewinders (not shown) are disposed outside the heating chamber 10 so that the electrodes travel in a roll-to-roll state. Since the electrode 1 has no supporting part other than the direction changing roller 20, heating members are installed on both sides of the surface F and the back surface B of the electrode 1 extending between the direction changing rollers 20. can In addition, the present invention is premised on heating both sides of the electrode 1. That is, the drying apparatus 100 of the present invention is for heating and drying the double-sided electrode in which the active material is formed on both the front (F) and the back (B) of the electrode (1).

The present invention includes a plurality of direction changing rollers 20 disposed in the heating chamber 10 and changing the direction of the traveling electrode 1 . The direction changing roller 20 is a guide roller for guiding the electrode 1 . In order to increase the travel path of the electrode 1 in a limited space such as the heating chamber 10, the electrode 1 must not travel in one direction. In the present embodiment, the direction changing rollers 20 are arranged so that the electrode 1 has an electrode travel path in which the horizontal travel portion H and the vertical travel portion V are alternately formed. For example, as shown in FIG. 3 , the direction of the electrode 1 is changed to horizontal travel-vertical travel-horizontal travel-vertical travel-horizontal travel by the four direction changing rollers 20 installed at each of the top, bottom, left and right vertices. It is transported along an inverted U-shaped path. Accordingly, since the electrode 1 is transported along an increased travel path while changing direction within the limited space of the heating chamber 10, drying efficiency is increased. In addition, since the space in which the heating member can be placed is expanded when the traveling route is lengthened, the heating effect can be increased by arranging more heating members. The arrangement of the direction changing rollers 20 and the electrode traveling path configured accordingly are not limited to the example of FIG. 3, and, contrary to FIG. 3, configured to follow a U-shaped path or configured to repeat a U-shaped path. You may.

The present invention is also arranged to face the surface (F) of the electrode (1) and the first heating member 31 for heating the electrode surface (F), and the back surface (B) of the electrode (1) is disposed to face It includes a pair of heating members 30 consisting of a first heating member 32 for heating the back surface of the electrode (B). Since the active material is formed on both sides of the electrode 1 in the double-sided electrode, the front and back surfaces may change depending on which side the electrode 1 is viewed from. That is, in the present invention, the front and rear surfaces of the electrode 1 are relative concepts. In this specification, for convenience, the upper surface of the electrode 1 when viewed from the vertical direction is referred to as the front surface F, and the lower surface is referred to as the rear surface B.

When the electrode traveling path has a path in which the horizontal traveling portion H and the vertical traveling portion V are alternately formed, as shown in FIG. It may be installed on one or more of the traveling parts (V). In the embodiment of FIG. 3 , a pair of heating members 30 are installed in both the horizontal traveling part H and the vertical traveling part V of the electrode traveling path to improve the heating effect. The heating member may be an infrared source, for example, an IR unit that heats the electrode 1 by irradiating infrared rays. The heating member is disposed to face the front surface (F) and the back surface (B) of the electrode 1, and may be installed in one or a plurality of units. In the example of FIG. 3 , a plurality of first and second heating members 31 and 32 for heating the horizontal traveling portion H of the electrode traveling path are disposed, and the first and second heating members 31 and 32 for heating the horizontal traveling portion H. As for the members 31 and 32, one pair is provided. However, the number of the first and second heating members or the number of pairs of heating members composed of the first and second heating members may be appropriately changed.

A characteristic feature of the present invention is that one of the first and first heating members 31 and 32 is installed to be movable with respect to the electrode 1. That is, since one of the first and first heating members 31 and 32 is installed to be movable with respect to the electrode 1, when the device operation is stopped or the electrode 1 is overdried, the heating member 31 and 32 ), by moving one of them to be spaced apart from the electrode 1, it is possible to rapidly discharge excess radiation heat or residual heat through the spaced apart space.

Meanwhile, it may be considered that the other one of the first and second heating members 31 and 32 is also installed to be movable with respect to the electrode 1 . However, considering the narrow space within the heating chamber 10, it is difficult to substantially provide a space within the heating chamber 10 for moving the other heating member. Therefore, in the present embodiment, the non-moving heating member among the first and second heating members is fixedly installed in the heating chamber 10 . In addition, the moving direction of the moving heating member is not necessarily limited to only one direction. Considering the limited space of the chamber 10, as will be described later, heating members disposed at different positions along the travel path of the electrode 1 can move relative to each other along different directions selected from among X, Y, and Z directions. there is. In order to install the heating member in the heating chamber 10 and move it with respect to the electrode 1, the heating member may be installed in a predetermined frame, respectively. The first and second heating members 31 and 32 on the front (F) and back (B) side of the electrode 1 are installed and supported on the respective frames 51, and the frames of the first heating member 31 And one of the frames of the second heating member 32 is installed to move relative to the electrode (1). A predetermined driving unit 40 may be connected to the frame to move the frame. In FIG. 3 , it is shown that the movable arms S1 and S2 of the frames 51 and 61 are connected to the main drive unit 40 . The main driving unit 40 functions as a control unit as a main servo motor. The movable arms S1 and S2 may be pneumatic or hydraulic cylinders. As shown in FIG. 3, the main drive unit 40 can control the driving of each frame 51 and 61, but each frame 51 and 61 independently controls each axial movement as needed. It is also possible to have a driving unit (for example, a servomotor).

Since the heating chamber 10 rises to a high temperature, for example, 200 degrees, by the heating member, it is preferable to install the main driving unit 40 and the like outside the heating chamber 10 to protect the driving unit. 3, it is shown that the main driver 40 is installed outside the heating chamber 10, and only the movable arms S1 and S2 for moving the respective frames 51 and 61 are installed inside the heating chamber 10. .

One of the first and second heating members 31 and 32 disposed on the surface (F) and the back surface (B) of the horizontal traveling part (H) in the traveling path of the electrode (1) is the electrode of the horizontal traveling part (H). It is installed to be movable in the vertical direction with respect to (1). In FIG. 3, the first and second heating members 31 and 32 are respectively disposed on the surface F and the back surface B of the horizontal running portion H of the electrode 1, and the first and second heating members 31 and 32 on the surface F side An upper frame 61 in which one heating member 31 is installed is movable in a vertical direction (Y direction) with respect to the electrode 1.

One of the first and second heating members 31 and 32 disposed on the surface (F) and the back surface (B) of the vertical traveling part (V) in the traveling path of the electrode (1) is the electrode of the vertical traveling part (V). It is installed to be movable in the horizontal direction with respect to (1). In FIG. 3, first and second heating members 31 and 32 are disposed on the surface F and the back surface B of the vertical running portion V of the electrode 1, respectively, and the first heating member on the surface side Side frames 51 provided with 31 are movable in the horizontal direction (left and right direction: X direction) with respect to the electrode 1 . As will be described later, one of the heating members disposed on both sides of the electrode of the vertical traveling part V can also move in the horizontal direction forming the forward and backward direction (Z direction) with respect to the vertically extending electrode 1.

In order to increase the travel path of the electrode 1 within the limited chamber space, it is preferable that the travel path has a loop shape. That is, the two vertical traveling parts (V) located on both sides of one horizontal traveling part (H) extend in the same direction upward or downward with respect to the horizontal traveling part (H), so that the horizontal traveling part (H) And when the two vertical traveling parts V form an electrode traveling path in the form of an upward loop or a downward loop, the electrode 1 can be dried by efficiently utilizing space. In FIG. 3 , vertical traveling portions V on both sides of the horizontal traveling portion H located at the center of the heating chamber 10 form a downwardly extending loop. In this case, with the central horizontal running part H as a reference, it takes the form of an upward loop. Conversely, the electrode traveling path may be configured in the form of a downward loop in which the vertical traveling portions V on both sides extend upward from the central horizontal traveling portion H.

The electrode traveling path of FIG. 3 includes the horizontal traveling portion H extending from the electrode inlet 11a of the heating chamber 10 at the ends of both vertical traveling portions V forming an upward loop and the electrodes of the heating chamber 10. The horizontal traveling parts H extending to the discharge port 11b form a path in the form of being connected to each other.

In addition, the first heating member 31 and the first heating member 32 are respectively installed on the electrode surface (F) and the back surface (B) side of the vertical running part (V) on both sides constituting the upward loop, and the first ,2 heating member is installed in each of the frames (first side frame 51, second side frame 52). The first side frame 51 installed on the surface side of the both sides of the vertical running part V is movable in the X-axis direction by each movable arm S1. That is, the first side frame 51 on the left side with respect to the central loop is moved to the left by the movable arm S1 installed on the side opposite to the side on which the first heating member 31 is installed, and the first side frame on the right side ( 51) can be horizontally moved to the right by the movable arm S1 installed on the side opposite to the side where the heating member 31 is installed.

On the other hand, the second side frames 52 in which the second heating members 32 are installed inside the vertical traveling part V are fixedly installed with respect to the electrode 1.

In FIG. 3, first and second heating members 31 and 32 are respectively installed on the electrode surface F and the back surface B of the central horizontal running part H forming the upward loop, respectively. The heating members 31 and 32 are installed on the respective frames (the first upper frame 61 and the second upper frame 62). The first upper frame 61 installed on the surface side of the horizontal traveling part H is movable in the Y-axis direction by the movable arm S2 connected to the main driving part 40. On the other hand, the second upper frame 62 in which the second heating member 32 is installed is installed on the back side B of the horizontal running part H, that is, on the inside of the upward loop, and is fixed to the electrode 1. In this embodiment, the first side frames 51 and the first heating member 31 on both sides move in the X-axis direction, and the first upper frame 51 and the first heating member 31 on the upper side move in the Y-axis direction. Since it moves in a direction, it is possible to efficiently utilize space by moving in a vertical direction with respect to each other.

On the other hand, the second heating members located inside the vertical running part (V) on both sides of the up loop are fixed to the two second side frames 52 spaced apart from each other, and are located inside the horizontal running part (H) at the center of the up loop. The second heating member 52 is fixed to the second upper frame 62 . Since these second heating members do not move, the two second side frames 51 and the second upper frame 62 in which the second heating members are installed are integrated to form one common frame (F1) in order to secure frame rigidity. ) can be done. Of course, if necessary, the second heating members may be installed in separate frames. However, as shown in FIG. 3, when the heating members inside the roof are installed in the integrally formed frame F1, the second heating members can be installed collectively, so the installation work is convenient and the frame rigidity can be increased.

4 and 5 are perspective views illustrating the operation of the electrode drying apparatus 100 of FIG. 3 .

Normally, when drying the electrode 1, the main drive unit 40 does not operate. However, when the electrode 1 is overheated or residual heat is present and it is necessary to discharge heat to the outside or cool it, the transfer of the electrode 1 is stopped, and power supply to the heating member is cut off. And as shown in FIG. 4 , each movable arm S1 is operated so that the first heating members 31 are spaced apart from the electrode 1 . That is, by moving the first side frames 51 on both sides in the left and right X-axis directions, respectively, the first heating members are spaced apart from the electrodes 1 of the vertical traveling parts V on both sides, and the first upper frame at the top 61 is moved in the Y-axis direction to separate the first heating member 31 from the electrode 1 of the central horizontal running part H. Residual heat can be quickly discharged to a space formed by the first heating members 31 spaced apart from the electrode 1 .

5 illustrates a state in which the electrode 1 is dried by restarting the device after residual heat is discharged. As shown, the first side frames 51 on both sides move inward in the X-axis direction to approach the surface side of the electrode 1, and the first upper frame 61 approaches the surface side of the electrode 1 The electrode 1 may be heated and dried by moving in the Y-axis direction so as to be. The movement stroke of the frames is appropriately determined within a range in which the electrode can be quickly dried without overdrying in consideration of the size of the heating chamber, the size of the electrode, the drying temperature of the heating chamber, the traveling speed of the electrode, and the output of the heating member. can

6 and 7 are schematic diagrams of main parts of the embodiment 100 of FIG. 3 and schematic views of main parts of a modified example 200 of the embodiment of FIG. 3 .

The drying apparatus 100 of FIG. 6 is a front view schematically showing only the heating chamber 10, the electrode travel path, the heating member 30, and the movable arms S1 and S2 in the embodiments of FIGS. 3 to 5, as described above. Likewise, it shows that the horizontal traveling part H in the center and the vertical traveling parts V on both sides form the electrode traveling path of the upward loop.

On the other hand, in the drying apparatus 200 of FIG. 7, the horizontal running part H in the center and the vertical running parts V on both sides form a downward loop electrode driving path. In the example of FIG. 7, the second heating member 32 installed on the back side (B) of the electrodes of both vertical running parts (V) is installed to be horizontally movable in the X-axis direction, and the surface side of the vertical running part (V) The first heating member installed in is fixedly installed. That is, the second heating member 32 outside the electrode 1 forming a downward loop and the second side frames 52 in which the second heating member 32 is installed are X by each movable arm S1'. It is installed so that it can move horizontally outward in the axial direction. In addition, contrary to FIG. 6, the second heating member 32 and the second lower frame 62' installed on the lower part (rear side) of the electrode 1 of the central horizontal running part H are the movable arm S2' It is designed to move downward in the Y-axis direction. Here, 61' denotes a first lower frame in which the first heating member 31 is installed. Here, the heating members disposed inside the central loop may be fixed to a common frame F1'.

Meanwhile, in FIGS. 6 and 7, the heating members disposed outside the up loop and the down loop move relative to the electrode 1, but the heating members disposed inside each loop move relative to the electrode 1. Possibly can be installed. In this case, the heating members disposed on the outside of each loop are fixedly installed with respect to the electrode 1. However, when moving the heating members disposed inside each loop, since the movement path in the left and right directions and the vertical direction is restricted by the electrode loop, they are moved in the forward and backward direction (Z-axis direction) to be separated from the electrode 1. can make it

(Second Embodiment)

8 is a front view showing a main part of another embodiment 300 of the electrode drying apparatus of the present invention, and FIG. 9 is a front view showing a main part 400 of the embodiment of FIG. 8 .

As described above, in order to improve productivity, the traveling speed of the electrode is gradually increased, and accordingly, the output of the heating member such as the IR unit is excessively increased, and the electrode 1 is overdried or the cable is damaged due to the excessive output. . If the drying process is performed at the same moisture spec and driving speed as in the prior art, excessive output of the heating member can be prevented if the contact time between the electrode 1 and the heating member can be increased. Alternatively, since a margin is generated in the output of the heating member, there is room for increasing the traveling speed. In order to increase the contact time with the electrode 1, a heating member must be additionally installed, but it is difficult to install an additional heating member with the current heating chamber structure.

The present embodiment is intended to solve this problem, and is intended to increase the contact time between the electrode 1 and the heating member by increasing the electrode travel path. To this end, in addition to the heating member movable in the X and Y axes, a heating member movable in the Z axis was installed to maximize the use of the limited space of the heating chamber 10 .

In this embodiment, the up loop and the down loop share one vertical traveling part (V) and have an alternately repeated electrode travel path.

Specifically, unlike the first embodiment, in the present embodiment, a plurality of electrode travel paths forming a plurality of loops are installed in the heating chamber 10 . That is, the present embodiment, in the heating chamber 10, a first loop forming a central upward loop or downward loop; a second loop sharing one vertical running part (V) with the first loop on one of the left and right sides of the first loop and forming a downward or upward loop in which a vertical extending direction is opposite to that of the first loop; and 3 of a second loop that shares one vertical running part (V) with the first loop on the other side of the left and right sides of the first loop and forms a downward or upward loop in which the vertical extension direction is opposite to that of the first loop. An electrode travel path including two loops is formed.

Referring to FIGS. 8 and 9 , a direction changing roller 20 is disposed in the heating chamber 10 to form an electrode traveling path in which an upward loop and a downward loop are repeated. In FIG. 8 , an electrode travel path of an up loop-down loop-up loop is formed, and in FIG. 9 an electrode travel path of a down loop-up loop-down loop is formed. The electrodes 1 of each successive loop share one vertical traveling portion V. Theoretically, it is also possible to repeat the up loop and the down loop three or more times. However, in this case, since the heating chamber 10 increases in the X-axis direction, the installation space of the facility should also be considered. In the present embodiment, since the size of the heating chamber 10 needs to be increased in the left-right direction while maintaining the size in the front-back direction or the vertical direction, layout improvement is easy and space utilization is efficient. Furthermore, since the shapes of the frames 51 installed in the heating chamber 10 are similar, the design and installation of the members are easy.

In FIG. 8, at the ends of the loops disposed on the left and right sides of the central upward or downward loop, a horizontal running part H extending from the electrode inlet 11a of the heating chamber 10 and a horizontal running part H extending to the electrode outlet 11b The electrode 1 of the part (H) is connected to form the entire electrode traveling path. An unwinder and a rewinder (not shown) are installed outside the heating chamber 10 to advance the electrode 1 roll-to-roll. In the form of FIG. 8, the electrode inlet 11a and the electrode outlet 11b are disposed below the heating chamber 10, and in the form of FIG. 9, the electrode inlet 11a and the electrode outlet 11b are disposed in the heating chamber ( 10) is placed at the top. In any form, the second and third loops are symmetrically arranged around the first loop in the center of the electrode travel path in the chamber. Accordingly, the inlet port 11a and the outlet port 11b of the electrode 1 connected to the second and third loops are also formed to face each other and be aligned on both sides of the upper or lower portion of the heating chamber wall 11. In this way, if the electrode traveling path is formed symmetrically, it is easy to arrange the heating member inside the heating chamber 10, the frame supporting the heating member, and the movable arm, and the unwinder or rewinder outside the heating chamber 10 Connection with can also be done conveniently. In addition, by making the electrode travel path symmetrical, it is easy to standardize the shape of the heating member and the support frame.

As shown in FIG. 8 , in the heating chamber 10 in which three loop electrode travel paths are installed, at least one electrode 1 of the horizontal travel parts forming the first to third loops travels horizontally on the upper and lower portions. A first heating member 31 and a second heating member 32 for heating the front surface F and the rear surface B of the negative electrode may be respectively disposed.

In addition, heating the surface (F) and the back surface (B) of the vertical traveling portion (V) electrode on the left and right of at least one electrode (1) of the vertical traveling portions (V) forming the first to third loops The first heating member 31 and the second heating member 32 may be respectively disposed.

In FIG. 8, except for the surface/rear side of the horizontal running part of the central downward loop and the horizontal running part of the upper central upward loop in FIG. 9, all other horizontal running parts H and vertical running parts V have heating members. is installed. The arrangement of the heating member and the support frame 51 according to the electrode travel path is not limited to those disclosed in FIGS. 8 and 9, and may be arranged in other forms.

In this embodiment, one of the first and second heating members installed on the front surface F and the back surface B of the electrode 1 is installed to be movable relative to the electrode 1, and has a structure capable of discharging residual heat. . To this end, each heating member is installed on each support frame, and the movable support frame among the support frames is movable in one of the X, Y, and Z axis directions by each movable arm.

Referring to FIG. 8 , heating members disposed outside the left and right second and third loops (upward loops) are disposed to be movable with respect to the electrode 1, and the heating members disposed inside the second and third loops are electrodes. It is fixedly installed for (1). That is, the first side frame 51 and the first heating member 31 disposed opposite to the surface F of the electrode of the vertical traveling part V located outside the second and third loops move left and right in the X-axis direction. can In addition, the first upper frame 61 and the first heating member 31 located on the horizontal running part H at the center of the second and third roofs may move in the Y-axis direction. In particular, the first heating member 31 movable in the Z-axis direction, which is the forward and backward direction, and the forward and backward movement frame F2 supporting it are provided on the electrode surface F side of the inner side of the first loop in the center as the outer side of the second and third loops. installed The frames supporting the heating member inside each loop may be connected to each other to form one common frame (F1, F2). As a result, each movable heating member moves in different directions of X, Y, and Z while Residual heat can be released. At the same time, an electrode travel path extended by 50% or more compared to the first embodiment is formed, and the contact time between the electrode and the heating member is increased to prevent over-drying of the electrode and excessive power of the heating member.

Referring to FIG. 9 , heating members disposed outside the left and right second and third loops (downward loops) are disposed to be movable with respect to the electrode 1, and the heating members disposed inside the second and third loops are electrodes. It is fixedly installed for (1). That is, the second heating member 32 and the second side frame 51 disposed opposite to the back surface B of the electrode of the vertical traveling part V located outside the second and third loops move left and right in the X-axis direction. can In addition, the second lower frame 62' and the second heating member 32 located under the horizontal running part H at the center of the second and third roofs may move in the Y-axis direction. In particular, as the outer side of the second and third loops, the second heating member 32 movable in the Z-axis direction, which is the forward and backward direction, on the back side of the electrode 1 inside the central first loop, and the forward and backward movement frame F2' supporting it is installed Frames supporting the heating member inside each loop may be connected to each other to form one common frame (F1', F2'). Accordingly, each movable heating member may discharge residual heat while moving in different directions of X, Y, and Z.

Meanwhile, in FIGS. 8 and 9, the heating members disposed outside the second and third loops move with respect to the electrode 1, but the heating members disposed inside the second and third loops move toward the electrode 1. It can be installed movably relative to. In this case, the heating members disposed outside the second and third loops are fixedly installed with respect to the electrode 1. However, when the heating members disposed inside the second and third loops are moved, the moving paths in the left and right directions and the vertical direction are restricted by the electrode loops, so they are moved in the forward and backward directions (Z-axis direction) to be separated from the electrodes. can make it

10 is a perspective view showing the embodiment 300 of FIG. 8, and FIGS. 11 and 12 are perspective views showing the operation of the electrode drying apparatus 300 of FIG.

As the outer side of the second and third loops, the first heating member 31 and the first side frame 51 are on the surface side of the outer vertical running portion V of the second and third loops, and the second heating member on the back side (32) and the second side frame 52 are installed. The first heating member 31 and the first side frame 51 are coupled to a movable arm S1 movable in the X-axis direction.

In addition, the first heating member 31 and the first upper frame 61 opposite to the surface (F) and the back surface (B) of the horizontal running part at the center of the second and third loops as the outer side of the second and third loops, and The first heating member 32 and the second upper frame 62 are respectively installed. The first heating member 31 and the first upper frame 61 are coupled to a movable arm S2 movable in the Y-axis direction.

In addition, the first heating member 31 and the front and rear moving frame F2 are opposite to the surface F of the vertical running part V of the first loop between the second and third loops as the outer side of the second and third loops. installed The forward/backward moving frame F2 faces the first side frame 51 facing the surface F of the vertical running part V on the left side of the center roof and the surface F of the vertical running part V on the right side of the center roof. It consists of a first side frame 51 and a connecting frame C connecting the side frames 51 to each other. A movable arm (S3) movable in the Z-axis direction is installed in the connection frame (C). The movable arm S3 is connected to the main drive unit 40 and can move in the Z-axis direction.

As shown in FIG. 11 , in order to discharge residual heat, the operation of the device (electrode movement) is stopped, and the heating members disposed outside the second and third loops (upper loops) are moved relative to the electrodes 1 . Specifically, the first heating member 31 and the first side frame 51 disposed opposite to the electrode surface F of the vertical running part V outside the second and third loops are left in the X-axis direction so as to be away from the electrodes. and to the right, respectively. The first side frame 51 is moved by a movable arm S1 connected to the main drive unit 40 .

In addition, the first heating member 31 and the first upper frame 61 located on the horizontal running part H in the center of the second and third loops are moved away from the electrode 1 by the movable arm S2. move in the Y-axis direction.

In addition, as the outer side of the second and third loops, the first heating member 31 located on the electrode surface F side inside the central first loop and the forward and backward movement frame F2 in which the first heating member 31 is installed It is moved in the Z-axis direction so as to be away from the electrode 1 by the movable arm S1.

Accordingly, each movable heating member may discharge residual heat while moving in different directions of X, Y, and Z.

12 shows a state in which the electrode 1 is dried by restarting the device after residual heat is discharged. As shown, the first side frames 51 on both sides move in the X-axis direction so as to approach the surface side of the electrode 1, and the first upper frame 61 approaches the surface side of the electrode 1 It moves in the Y-axis direction, and the forward and backward movement frame F2 moves in the Z-axis direction so as to approach the surface of the electrode 1, so that the electrode 1 can be heated and dried.

If the electrode travel path is configured as in the second embodiment, the electrode transfer path for drying is increased by 50% or more compared to the first embodiment. As a result, for example, based on a conveying speed of 1000 mm/s, the output of the IR unit of the first embodiment is 100%, and the contact time between the electrode and the IR unit is 3.57 sec, whereas in the second embodiment the output is 64%, If the contact time between the electrode and the IR unit is 5.58 sec, the same drying performance and yield can be secured. Therefore, in the case of the second embodiment, it was confirmed that the output can be reduced by 36% compared to the first embodiment. If, in the second embodiment, there is no problem even if the output is maintained at 100%, since the transfer speed of the electrode can be increased to 1563 mm / sec, there is an effect that the production yield can be increased.

In the present invention, the shape and structure of the frame supporting the heating member may be variously changed. For example, instead of using a common frame as a frame for supporting fixed heating members, a separate frame may be configured for each heating member disposed opposite to each electrode. When configured with a common frame, a bridge portion (T) connecting both sides of the frame may be installed to reinforce rigidity if necessary (see FIGS. 7 and 8).

In addition, to increase the heating and drying effect, a heating member is additionally disposed on the electrode on the side where the heating member is not installed (the surface and back side of the horizontal traveling part electrode forming an upward or downward loop in the center of FIGS. 7 and 8). can

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the drawings disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these drawings. The protection scope of the present invention should be construed according to the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

1: electrode
F: electrode surface
B: back side of the electrode
10: heating chamber
11: chamber wall
11a: electrode inlet
11b: electrode outlet
20: direction change roller
30: heating member (pair)
31: first heating member
32: second heating member
40: main driving part
51: first side frame
52: second side frame
61: first upper frame
62: second upper frame
S1,S2,S3: movable arm
S1', S2', S3': movable arm
61 ': first lower frame
62 ': second lower frame
F1,F1': common frame
F2,F2': Back and forth movement frame
C: connection frame
T: bridge

Claims (15)

As an electrode drying device for heating and drying battery electrodes,
a heating chamber in which electrodes travel in a roll-to-roll state;
a plurality of direction changing rollers disposed in the heating chamber and changing the direction of the traveling electrode; and
A pair of heating members composed of a first heating member disposed opposite to the surface of the electrode to heat the surface of the electrode and a second heating member disposed opposite to the rear surface of the electrode to heat the rear surface of the electrode,
An electrode drying apparatus in which one of the first and second heating members is installed to be movable relative to the electrode.
According to claim 1,
The plurality of direction changing rollers are arranged so that the horizontal running part and the vertical running part have electrode travel paths formed alternately,
The pair of heating members is an electrode drying device installed on at least one of the horizontal traveling part and the vertical traveling part.
According to claim 2,
One of the first heating member and the second heating member disposed on the surface and the back surface of the horizontal running part of the electrode is installed to be movable in a vertical direction with respect to the electrode of the horizontal running part,
One of the first heating member and the second heating member disposed on the surface and the back surface of the vertical traveling part of the electrode is installed to be movable in a horizontal direction with respect to the electrode of the vertical traveling part.
According to claim 3,
An electrode drying device in which one of the first heating member and the second heating member disposed on the surface and the back surface of the vertical running part of the electrode is movable in the left and right directions or in the front and rear directions with respect to the electrode of the vertical running part.
According to claim 2,
Two vertical traveling parts located on both sides of one horizontal traveling part extend in the same direction upward or downward based on the horizontal traveling part, so that the horizontal traveling part and the two vertical traveling parts form an upward loop or downward loop electrode. An electrode drying device that forms a travel path.
According to claim 5,
The electrode travel path includes one up loop or one down loop,
Electrode drying in which the electrode traveling path is formed so that the horizontal traveling part extending from the electrode inlet of the heating chamber and the horizontal traveling part extending to the electrode outlet of the heating chamber are connected to both ends of the vertical traveling part forming the up loop or the down loop. Device.
According to claim 6,
A first heating member and a second heating member for heating the upper and lower surfaces of the horizontal traveling portion electrodes are respectively disposed on the upper and lower portions of the horizontal traveling portion forming the upward loop or the downward loop,
A first heating member and a second heating member for heating the surface and the back surface of the vertical traveling portion electrode are respectively disposed on the left and right sides of the vertical traveling portion forming the upward loop or the downward loop,
Among the first and second heating members, heating members disposed on one of the outer and inner sides of the upper loop or the lower loop are installed to be movable with respect to the electrode, and are installed on the other one of the outer and inner sides of the upper loop or the lower loop. The electrode drying device in which the heating members are fixedly installed with respect to the electrode.
According to claim 7,
A heating member disposed outside the up loop or down loop among heating members for heating the horizontal running portion and a heating member disposed outside the up loop or down loop among heating members for heating the vertical running portion are relative to each other. Electrode drying device moving in the vertical direction.
According to claim 8,
Electrode drying apparatus in which the heating members disposed inside the upper loop or the lower loop are fixed to a common frame.
According to claim 5,
An electrode drying device having an electrode travel path in which an up loop and a down loop share one vertical travel part and repeat alternately.
According to claim 10,
in the heating chamber;
a first loop forming a central upward or downward loop;
a second loop sharing one vertical traveling portion with the first loop on one of the left and right sides of the first loop and forming a downward or upward loop in which a vertical extension direction is opposite to that of the first loop; and
Including three loops of the second loop that share one vertical traveling portion with the first loop on the other side of the left and right of the first loop and form a downward or upward loop in which the vertical extension direction is opposite to the first loop An electrode drying device in which an electrode travel path is formed.
According to claim 11,
Electrode drying apparatus wherein the second loop and the third loop are symmetrically disposed around the first loop.
According to claim 11,
A first heating member and a second heating member for heating the surface and the back surface of the horizontal traveling portion electrode are respectively disposed above and below the at least one electrode of the horizontal traveling portions forming the first to third loops,
An electrode drying device in which a first heating member and a second heating member for heating the surface and the back surface of the vertical traveling portion electrode are respectively disposed on the left and right sides of at least one electrode of the vertical traveling portions forming the first to third loops.
According to claim 13,
An electrode drying apparatus in which heating members disposed outside the second and third loops are movably disposed with respect to the electrodes, and heating members disposed inside the second and third loops are fixedly installed with respect to the electrodes.
According to claim 13,
An electrode drying apparatus in which heating members disposed inside the second and third loops are movably disposed with respect to the electrodes, and heating members disposed outside the second and third loops are fixedly installed with respect to the electrodes.

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