KR20120052650A - Apparatus and method for drying electrode plate - Google Patents

Abstract

PURPOSE: A device and a method for drying electrode plate are provided to make in-line and arranging unit structure possible according to automation, and to reduce tact time of air diffuser. CONSTITUTION: A device for drying electrode plate(1) comprises: N of unit drying chambers(10,20,30) with an inlet and an outlet, for drying an electrode plate(20); a first door(11) arranged in inlet of a first unit drying chamber; outlets of a k th unit drying chamber arranged adjacently, and a k+1 th door(21,31) arranged to be opened and closed in the inlets of the k+1 th unit drying chambers; and a N+1 th door(41) arranged in an outlet of the N th unit drying chamber. The k+1 th door is opened only in case vacuum pressure of the k th unit drying chamber and the k+1 th unit drying chamber is lower than specific value.

Description

Apparatus and method for drying electrode plate

The present invention relates to an electrode plate drying apparatus and method, and more particularly to a structure of the vacuum electrode plate drying apparatus and a vacuum electrode plate drying method.

As advanced electronic devices such as mobile phones, notebook computers, and camcorders develop, demand for batteries is increasing. Batteries generally generate electrical energy by providing positive and negative electrode plates. The battery electrode plate may be provided in a reel shape with a separator interposed between the positive electrode and the negative electrode plates depending on the configuration of the battery, or may be configured by laminating the positive electrode and negative electrode plates formed in a plate state with the separator interposed therebetween. .

In manufacturing the positive and negative electrode plates that generate electrical energy, the generation of electrical energy may or may not occur smoothly depending on the dry state. That is, when impurities, such as water, oil, and gas, are contained in the positive or negative electrode plates, the polarity may be irregular or poor depending on the content of moisture, oil, and impurities, and thus may not generate rated energy. In addition, when the positive or negative electrode plate has moisture, oil or impurities, the life of the battery may be reduced.

The pole plate drying apparatus and method according to an embodiment of the present invention aims to disclose an automated structure of the pole plate manufacturing.

One aspect of the present invention is to dry the pole plate and the N unit drying chamber having an inlet and an outlet; A first door disposed at an inlet of the first drying unit; A k + 1th door configured to be opened and closed at an outlet of the kth unit drying chamber and an inlet of the k + 1th unit drying chamber disposed adjacent to each other; And an N-th +1 door disposed at an outlet of the unit drying chamber.

The k + 1th door may be opened when the vacuum pressures of the kth unit drying chamber and the k + 1th unit drying chamber are equal to or less than a predetermined value.

The electrode plate drying apparatus may further include a shuttle driving unit for transferring the electrode plate from the kth unit drying chamber to the k + 1th unit drying chamber when the k + 1th door is opened.

The shuttle driving unit may be a conveyor disposed in the k + 1 th unit drying chamber.

The k-th unit drying chamber may include a vacuum device for vacuuming the k-th unit drying chamber; And a heater disposed in the k-th unit drying chamber.

The k-th unit drying chamber may further include a gas injection unit for injecting gas into the k-th unit drying chamber.

The pole plate drying apparatus may further include a k + 1th door driving unit that provides a driving force to the k + 1th door.

The N unit drying chambers may be arranged along one direction.

The N unit drying chambers may be arranged in a U shape.

The k + 1 th door may move on a plane perpendicular to the traveling direction of the electrode plate.

The k + 1th door may move in the up and down direction with respect to the traveling direction of the electrode plate.

The k + 1th door may move in a left-right direction with respect to a traveling direction of the electrode plate.

The first unit drying chamber may be a preheating drying chamber.

The N-th unit drying chamber may be a cooling drying chamber.

The pole plate may be a pole plate for a secondary battery.

Another aspect of the invention provides a pole plate drying apparatus comprising an N unit drying chamber having an inlet and an outlet and drying the pole plate; Evacuating from the first unit drying chamber to the Nth unit drying chamber; Preheating and evacuating the electrode plate in a first unit drying chamber; Transferring the electrode plate from the kth unit drying chamber to the k + 1th unit drying chamber when the vacuum pressure of the kth unit drying chamber and the k + 1th vacuum pressure of the unit drying chamber is equal to or less than a predetermined value; Drying the electrode plate in the k + 1th unit drying chamber; And N-th step of cooling the electrode plate in the unit drying chamber.

The preheating step may include vacuuming the first unit drying chamber; Heating the first unit drying chamber; And forming a gas flow in the first unit drying chamber.

The cooling step may include forming a gas flow in the Nth unit drying chamber; Cooling the Nth unit drying chamber; And venting the N-th unit drying chamber.

The drying step may include maintaining a temperature and a vacuum pressure of the k + 1th unit drying chamber; And forming a gas flow of the k + 1 th unit drying chamber.

The pole plate drying apparatus includes a k + 1 door disposed to be opened and closed at an outlet of the k-th unit drying chamber and a k + 1 inlet of the unit-drying chamber disposed adjacent to each other, and the transfer step includes the k + 1th. The pole plate may be conveyed through a passage through which the door is opened.

Another aspect of the present invention provides a pole plate drying method for transferring the pole plate disposed inside the first unit drying chamber to the second unit drying chamber when the vacuum pressure of the adjacent first unit drying chamber and the second unit drying chamber is less than a predetermined value. do.

An automatic door is disposed between the first unit drying chamber and the second unit drying chamber to be opened and closed, and the electrode plate may be transferred through a passage in which the automatic door is opened.

According to an embodiment of the present invention, there is an effect that in-line and batch unit configurations are possible according to automation of the pole plate drying apparatus. In addition, there is an effect that the tac time is shortened by automatic feeding and taking out of the pole plate drying apparatus. Accordingly, there is an effect that can reduce the labor cost of workers.

1 is a schematic perspective view of a pole plate drying apparatus according to an embodiment of the present invention.
FIG. 2 is an enlarged schematic partial perspective view of the first unit drying chamber in the embodiment of FIG. 1.
3 is a front view of the embodiment of FIG. 2.
4 is another modification of the embodiment of FIG.
5A to 5G are schematic conceptual views sequentially illustrating a method of transporting a plate in the embodiment of FIG. 1.
6 is a schematic conceptual view from above as another variation of the embodiment of FIG. 1.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the invention is defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, “comprises” and / or “comprising” refers to the presence of one or more other components, steps, operations, and / or elements. Or does not exclude additions. Terms such as first and second may be used to describe various components, but the components are not limited by the terms. Terms are used only for the purpose of distinguishing one component from another.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic perspective view of a pole plate drying apparatus 1 according to an embodiment of the present invention. Drying of the electrode plate may be performed between the slitting process and the winding process, for example, of the battery plate manufacturing process of the battery. Here, the battery may be a secondary battery and the pole plate may be a pole plate for a secondary battery.

The electrode plate drying apparatus 1 may include a plurality of unit drying chambers 10, 20, 30. In FIG. 1, three unit drying chambers 10, 20, and 30 are configured, but the number thereof is not limited thereto. For example, the electrode plate drying apparatus 1 may be provided with five unit drying chambers 10, 20, 30 or N as needed. At this time, each unit drying chamber (10, 20, 30) may be provided with an inlet and an outlet.

k

N) 단위 건조실은 제1 단위 건조실(10)과 유사한 또는 동일한 구조일 수 있다. 도 2는 도 1의 실시예에서 제1 단위 건조실(10)을 확대한 개략적 부분 사시도이다. 도 3은 도 2의 실시예의 정면도이다. The structure of the 1st unit drying chamber 10 is demonstrated with reference to FIG. 2 and FIG. In this case, the second unit drying chamber 20 and the third unit drying chamber 30 may have a structure similar to the first unit drying chamber 10. In addition, when the pole plate drying apparatus 1 is equipped with a total of N unit drying chambers, it is k (1).

k

N) The unit drying chamber may have a structure similar or identical to that of the first unit drying chamber 10. FIG. 2 is an enlarged schematic partial perspective view of the first unit drying chamber 10 in the embodiment of FIG. 1. 3 is a front view of the embodiment of FIG. 2.

The first unit drying chamber 10 includes a vacuum device 13, a gas injection unit 15, a fan 16, a heater 17, a thermal diffusion plate 18 and / or a pole plate and a holder, and a shuttle driving unit 19. can do.

The vacuum apparatus 13 may vacuum the inside of the first unit drying chamber 10. At this time, the vacuum pressure of the first unit drying chamber 10 may be a predetermined value, for example, may be a value around 10 ^-3 Torr. If the vacuum pressure is greater than 10 ^-3 Torr, it is low vacuum. If the vacuum pressure is less than 10 ^-3 Torr, it can be high vacuum. The vacuum device 13 may vacuum the first unit drying chamber 10 in a low vacuum state. However, the degree of vacuum of the first unit drying chamber 10 is not limited thereto, but may be vacuumed to a high vacuum state.

The gas injection unit 15 may inject a gas into the first unit drying chamber 10 to create a gas flow. The gas injection unit 15 may inject gas into the first unit drying chamber 10 to facilitate heat transfer of the electrode plate 2. In this case, the injected gas may be an inert gas so that the reaction with the electrode plate does not occur. For example, nitrogen, argon, carbon dioxide or helium gas may be used as the inert gas. At this time, the use of nitrogen has the advantage of more economic. The injection method may be unit injection using MFC (Mass Flow Control).

The fan 16 is disposed inside the first unit drying chamber 10, and may generate a flow of gas or the like inside the first unit drying chamber 10 by the rotation of the fan 16. In this case, the fan 16 may be omitted in the first unit drying chamber 10. That is, even without the fan 16, the gas injected through the gas injection unit 15 may create a flow in the first unit drying chamber 10.

The heater 17 may be disposed in the first unit drying chamber 10 in the form of a hot wire. In this case, the heat diffusion plate 18 may be disposed to diffuse the heat of the heater 17. The thermal diffusion plate 18 may be disposed to be spaced apart from the heater 17 by a predetermined distance.

The shuttle driver 19 may be disposed in the first unit drying chamber 10. The shuttle drive 19 may be, for example, a conveyor (C) type. For example, the shuttle drive unit 19 includes a plurality of rollers, and can rotate the pole plates 2 or the pole plate drying assemblies 5 in the first unit drying chamber 10 by the rotation of the rollers.

2 and 3, the pole plate drying assembly 5 may include a pole plate support 3, a pole plate support rod 4, and a pole plate 2. The electrode plate drying assembly 5 may be disposed in the first unit drying chamber 10 or transferred to the adjacent second unit drying chamber 20 by the shuttle driver 19. The pole plate 2 may be wound on a reel and disposed on the pole plate support rod 4. In the drawings, for convenience of description, the single pole plate 2 is disposed on the single pole plate support bar 4, but the protection scope of the present invention is not limited thereto. For example, it is a matter of course that the plurality of pole plates 2 may be disposed on the plurality of pole plate support rods 4, respectively. The pole plate support rod 4 may be arranged on the pole plate support 3. The pole plate support 3 may be formed in an L shape, but the structure of the pole plate support 3 is not limited thereto.

The pole plate drying assembly 5 moves as the pole plate support 3 is transported. The pole plate support 3 may be conveyed by the shuttle drive 19. The pole plate support 3 located in the first unit drying chamber 10 may be transferred to the second unit drying chamber 20 by the shuttle driving unit 19 of the first unit drying chamber 10. In this case, the width in the traveling direction of the bottom surface of the pole plate support 3 may be greater than the distance between the shuttle drive unit 19 of the first unit drying chamber 10 and the shuttle drive unit (not shown) of the second unit drying chamber 20. Therefore, as the shuttle driver 19 operates, the pole plate support 3 may be transferred from the first unit drying chamber 10 to the second unit drying chamber 20.

Of course, the method of transferring the pole plate drying assembly 5 from the first unit drying chamber 10 to the second unit drying chamber 20 is not limited thereto, and may be transferred through various methods.

The second door 21, the third door 31, or the fourth door 41 will be described as a k + 1 door for convenience of description below. The pole plate drying apparatus 1 may include a k + 1th door driving unit (not shown) that provides a driving force to the k + 1th door to open and close the k + 1th door. The k + 1 th door may move on a plane perpendicular to the traveling direction A of the pole plate 2. At this time, of course, the first door 11 may also move on a plane perpendicular to the traveling direction A of the electrode plate 2. However, in the case of the first door 11, since there is space, it can be configured not only on the plane perpendicular to the traveling direction A but also open by drawing an arc in the opposite direction of the traveling direction A. The fourth door 41, which is the last door, may also be opened by drawing an arc in the advancing direction A since there is space.

For example, referring to FIG. 2, the k + 1 door may move in the vertical direction with respect to the traveling direction A of the electrode plate 2. In addition, referring to FIG. 4, the k + 1th door may move in the left and right direction with respect to the traveling direction A of the electrode plate 2. Although not shown in FIG. 2 or 4, the k + 1 door may be rotated and moved based on a point on a plane perpendicular to the traveling direction A of the pole plate 2.

The k + 1th door may be opened when the vacuum pressures of the kth unit drying chamber and the k + 1th unit drying chamber are equal to or less than a predetermined value. In addition, the shuttle driver 19 may transfer the electrode plate 2 from the k-th unit drying chamber to the k-th unit drying chamber when the k + 1 th door is opened. When the pole plate 2 is transferred, the pole plate 2 may be transferred through a passage in which the k + 1th door is opened.

For example, when the vacuum pressures of the adjacent first unit drying chamber 10 and the second unit drying chamber 20 are both less than or equal to a predetermined value, the second door 21 disposed between the openings may be opened. At this time, when the vacuum pressure difference between the first unit drying chamber 10 and the second unit drying chamber 20 is large, the second door 21 is not opened due to the difference in the vacuum pressure. At this time, when the vacuum pressure of the two unit drying chambers 10 and 20 is maintained within the same or predetermined range and the second door 21 is opened, there is an advantage that the loss of vacuum is reduced.

Here, the first door 11 may be disposed at the inlet of the first unit drying chamber 10. In addition, an N + 1th door may be disposed at the outlet of the Nth unit drying chamber. That is, when a total of three unit drying chambers are arranged, the fourth door 41 may be disposed at the outlet of the third unit drying chamber.

A method of conveying the electrode plate 2 will be described with reference to FIGS. 5A to 5G. 5A to 5G are schematic conceptual views sequentially illustrating a method of transporting a plate in the embodiment of FIG. 1.

Referring to FIG. 5A, the pole plate drying apparatus 1 may include three unit drying chambers 10, 20, and 30 that dry the pole plate 2 and have an inlet and an outlet. At this time, for convenience of description, but described with an example having three unit drying chamber (10, 20, 30), of course, the embodiment of the present invention is not limited thereto. For example, the electrode plate drying apparatus 1 may include five unit drying chambers or N unit drying chambers.

In FIG. 5A, the first unit drying chamber 10 to the third unit drying chamber 10 may be evacuated. If the electrode plate drying apparatus 1 includes N unit drying chambers, the first plate drying chamber 10 may be vacuumed from the first unit drying chamber 10 to the Nth unit drying chamber.

Referring to FIG. 5B, the first unit drying chamber 10 may be vented to lower the vacuum pressure to atmospheric pressure and introduce the first electrode plate. Of course, the process of FIG. 5A may be omitted and the process of FIG. 5B may be started. In this case, the reason for making the first unit drying chamber 10 in a vacuum as in the process of FIG. 5A is to remove moisture and unnecessary gas inside the first unit drying chamber 10 so that the drying of the first electrode plate may be more actively performed. For sake.

Referring to FIG. 5C, in order to transfer the first electrode plates from the first unit drying chamber 10 to the second unit drying chamber 20, the vacuum pressures of the two unit drying chambers 10 and 20 need to be adjusted within a predetermined level. At this time, since the second unit drying chamber 20 is already in a vacuum state, it is necessary to vacuum the first unit drying chamber 10. At this time, in order to activate the drying of the first electrode plate in a plurality of unit drying chamber (10, 20, 30) requires a high temperature. For example, the plurality of unit drying chambers 10, 20, 30 may be heated to about 500 ° C. When the first electrode plate is disposed in the first unit drying chamber 10, the interior of the first unit drying chamber 10 is at atmospheric pressure. If the temperature of the first unit drying chamber 10 is rapidly raised, the first electrode plate may be carbonized at 100 ° C. or more. Therefore, in order to prevent such a phenomenon, the first unit drying chamber 10 may be evacuated as a preheating step and the temperature may be increased. That is, since the inside of the first unit drying chamber 10 is evacuated, carbonization of the first electrode plate can be prevented even when the temperature is 100 ° C or higher.

Before the inside of the first unit drying chamber 10 is evacuated, the moisture density may be high in the air around the first electrode plate. At this time, the vacuum is in progress and moisture around the first electrode plate may exit the first unit drying chamber 10. Here, when the degree of vacuum of the first unit drying chamber 10 exceeds a predetermined range, the density of particles that can create a flow of fluid in the first unit drying chamber 10 is lowered, so that the moisture present around the first electrode plate is reduced. There is a problem that this discharge flow does not occur well. In addition, when the density of the particles is lowered therein, the particles heated by the heater 17, the heat diffusion plate 18, and the like are not transferred to the first electrode plate, so that heat transfer due to convection or the like is lowered, so that the drying of the first electrode plate by heating is easy. There is a problem that it does not. In order to solve this problem, the gas injection unit 15 may inject an inert gas into the first unit drying chamber 10 to form a flow. That is, inert gas such as nitrogen is injected to prevent chemical reaction with the first electrode plate, and at the same time, transfer heat from the heater 17 to the first electrode plate, and move moisture around the first electrode plate to move the vacuum apparatus ( 13) can be discharged out of the first unit drying chamber (10).

In addition, a flow may be formed in the first unit drying chamber 10 by the operation of the fan 16.

Referring to FIG. 5D, when the first unit drying chamber 10 has reached a high temperature (500 ° C.), and also reaches a vacuum pressure within a predetermined range, and the second unit drying chamber 20 also has a high temperature and high pressure, By opening the second door 21, the first electrode plate may be transferred from the first unit drying chamber 10 to the second unit drying chamber 20. Referring to FIG. 5E, the first electrode plate disposed in the second unit drying chamber 20 is dried at high temperature and high pressure. Gas may be introduced by the gas injection unit 15 during drying, and the introduced gas may form heat conduction and flow. In addition, the first unit drying chamber 10 may newly introduce the second electrode plate.

Referring to FIG. 5F, the first electrode plate may be transferred from the second unit drying chamber 20 to the third unit drying chamber 30. At this time, since the second and third unit drying chambers 20 and 30 are both high temperature and high pressure, the vacuum pressure and the temperature loss can be minimized. 5A to 5G illustrate the case where three unit drying chambers 10, 20, and 30 are arranged, but even when the number of unit drying chambers is larger than that, the plate transfer between adjacent unit drying chambers at high temperature and high pressure is performed under vacuum pressure and temperature. The advantage is that the losses can be minimized.

Referring to FIG. 5G, a step of cooling the first electrode plate disposed in the third unit drying chamber 30 to the outside of the room temperature is necessary. At this time, the inside of the third unit drying chamber 30 may be cooled by lowering the temperature of the heater while activating heat transfer through a flow of gas in the third unit drying chamber 30. At this time, as the temperature is cooled, a venting operation of lowering the vacuum pressure may be performed. When the vacuum pressure is sufficiently low, the first electrode plate can be discharged to the outside. In this case, if there are N unit drying chambers, a cooling step may be performed in the Nth unit drying chamber from which the first electrode plate is discharged.

At this time, for example, when the decompression and venting operations each take about thirty minutes, the tact time may be about thirty minutes, and the pole plates may be discharged every thirty minutes.

Referring to FIG. 1, the pole plate drying apparatus 1 may arrange N unit drying chambers along one direction. However, the arrangement of the unit drying chamber is not limited thereto.

It demonstrates with reference to FIG. 6 is a schematic conceptual view from above as another variation of the embodiment of FIG. 1. Referring to FIG. 6, the pole plate drying apparatus may include four unit drying chambers 110, 120, 130, and 140. In this case, the first, second, third, fourth, and fifth doors 111, 121, 131, 141, and 151 may be configured to move left and right on a plane perpendicular to the traveling direction of the electrode plate. Of course, it can also be configured to move up and down. In this case, the pole plate drying apparatus may arrange four unit drying chambers 110, 120, 130, and 140 in a U shape. At this time, of course, the number of unit drying chambers is not limited thereto, and may be six or N.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

The present invention can be used in all industries of manufacturing and using the electrode plate drying apparatus.

1: pole plate drying device 2: pole plate
3: pole plate support 4: pole plate support
5: pole plate drying assembly 10, 110: first unit drying chamber
11: first door 13, 23, 33: vacuum device
15: gas injection unit 16: fan
17: heater 18: thermal diffusion plate
19: shuttle drive unit 20, 120: second unit drying chamber
30, 130: 3rd unit drying chamber 140: 4th unit drying chamber

Claims (22)

N unit drying chambers for drying the pole plates and having inlets and outlets;
A first door disposed at an inlet of the first drying unit;
A k + 1th door configured to be opened and closed at an outlet of the kth unit drying chamber and an inlet of the k + 1th unit drying chamber disposed adjacent to each other; And
N-th + 1 door disposed at the outlet of the unit drying chamber; The method of claim 1,
And the k + 1th door is opened when the vacuum pressures of the kth unit drying chamber and the k + 1th unit drying chamber are equal to or less than a predetermined value. The method of claim 2,
And a shuttle driving unit for transferring the pole plate from the k-th unit drying chamber to the k-th unit drying chamber when the k + 1th door is opened. The method of claim 3,
And the shuttle driving unit is a conveyor disposed in the k + 1th unit drying chamber. The method of claim 1,
The k-th unit drying chamber,
A vacuum apparatus for vacuuming the k-th unit drying chamber; And
The k-th electrode plate drying apparatus further comprises a heater disposed inside the unit drying chamber. The method of claim 1,
The k-th unit drying chamber further comprises a gas injection unit for injecting gas into the k-th unit drying chamber. The method of claim 1,
And a k + 1 door driving unit providing a driving force to the k + 1 th door. The method of claim 1,
And the N unit drying chambers are arranged along one direction. The method of claim 1,
The N unit drying chamber is arranged in a U-shaped pole plate drying apparatus. The method of claim 1,
The k + 1 door is a pole plate drying apparatus that moves on a plane perpendicular to the traveling direction of the pole plate The method of claim 1,
The k + 1 door is a pole plate drying device that moves in the vertical direction with respect to the traveling direction of the pole plate. The method of claim 1,
The k + 1 door is a pole plate drying device that moves in the left and right direction with respect to the traveling direction of the pole plate. The method of claim 1,
And the first unit drying chamber is a preheating drying chamber. The method of claim 1,
The Nth unit drying chamber is a cold plate drying apparatus. The method of claim 1,
The pole plate is a pole plate drying apparatus that is a pole plate for secondary batteries. Providing a pole plate drying apparatus having N unit drying chambers having an inlet and an outlet and drying the pole plates;
Evacuating from the first unit drying chamber to the Nth unit drying chamber;
Preheating and evacuating the electrode plate in a first unit drying chamber;
Transferring the electrode plate from the kth unit drying chamber to the k + 1th unit drying chamber when the vacuum pressure of the kth unit drying chamber and the k + 1th vacuum pressure of the unit drying chamber is equal to or less than a predetermined value;
Drying the electrode plate in the k + 1th unit drying chamber; And
The Nth electrode plate drying method comprising the step of cooling the electrode plate in the unit drying chamber. The method of claim 16,
The preheating step,
Evacuating the first unit drying chamber;
Heating the first unit drying chamber; And
And forming a gas flow in the first unit drying chamber. The method of claim 16,
The cooling step,
Forming a gas flow in the Nth unit drying chamber;
Cooling the Nth unit drying chamber; And
The N-th electrode plate drying method comprising the step of venting the unit drying chamber. The method of claim 16,
The drying step,
Maintaining a temperature and a vacuum pressure of the k + 1 th unit drying chamber; And
The k + 1 electrode plate drying method comprising the step of forming a gas flow of the unit drying chamber. The method of claim 16,
The pole plate drying apparatus includes a k + 1 door disposed to be opened and closed at an outlet of the k-th unit drying chamber and a k + 1 inlet of the unit-drying chamber disposed adjacent to each other, and the transfer step includes the k + 1th. A pole plate drying method for transporting the pole plate through a passage opening the door. The electrode plate drying method for transferring the electrode plate disposed inside the first unit drying chamber to the second unit drying chamber when the vacuum pressure of the adjacent first unit drying chamber and the second unit drying chamber is less than a predetermined value. The method of claim 21,
And an automatic door arranged to be opened and closed between the first unit drying chamber and the second unit drying chamber, wherein the pole plate is transferred through a passage in which the automatic door is opened.

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