Drying device for electrode manufacturing

Abstract

The drying apparatus for electrode manufacturing according to one embodiment of the present invention comprises: a transfer unit for transferring an electrode base material; a heating unit for applying heat to the electrode substrate being transferred; a position adjusting unit for adjusting the position of the heating unit; a first cooling unit for spraying air toward the electrode substrate positioned on the transfer unit; and a control unit for activating the first cooling unit when the transfer of the electrode base material is stopped.

Description

Technical Field

[0001] The present invention relates to a drying device for producing an electrode and to a drying device for producing an electrode capable of preventing an electrode base material from being overheated due to residual heat of a heating portion when the operation of the electrode base material stops.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0030661, filed on March 8, 2023, the disclosure of which is incorporated herein by reference in its entirety. Background Art

[0003] In a lithium secondary battery, charging and discharging are caused in a process in which lithium ions moving from a positive electrode are reversibly inserted into and released from a negative electrode, and the positive electrode and the negative electrode are laminated with a separator interposed therebetween, thereby forming an electrode substrate assembly.

[0004] According to the shape of the battery case, secondary batteries are divided into: cylindrical batteries and rectangular batteries in which the electrode substrate assembly is embedded in a cylindrical or rectangular metal can; and pouch-type batteries in which the electrode substrate assembly is embedded in a pouch-type case of an aluminum laminate.

[0005] In addition, the secondary battery can be formed by inserting an electrode substrate assembly consisting of a positive electrode, a negative electrode and a separator into a case and then sealing it. The electrode substrate assembly can be formed by winding the positive electrode and the negative electrode, wherein the separator is inserted between the positive electrode and the negative electrode multiple times in the form of a core roll, or by laminating them in multiple layers.

[0006] Meanwhile, when manufacturing an electrode substrate such as a positive electrode or a negative electrode in a secondary battery, the electrode substrate is dried.

[0007] The electrode substrate is dried in a roll-to-roll manner while passing through a drying section, which dries the electrode substrate using a heating lamp.

[0008] At the same time, when the roll-to-roll equipment stops, there is a problem that the electrode substrate that has stopped operating in the drying chamber is overheated due to the residual heat of the heated heating lamp, and when the electrode substrate is restarted in an overheated state, temperature oscillation occurs, or when the temperature of the electrode substrate increases, there is a problem that the physical properties of the electrode are changed. Summary of the invention

[0009] Technical issues

[0010] The present invention aims to provide a drying device for electrode manufacturing, which can prevent the electrode substrate from being overheated due to the residual heat of a heating part when the operation of the electrode substrate is stopped.

[0011] The present invention aims to provide a drying device for electrode manufacturing, which can prevent the residual heat of a heating part from being transferred to the electrode substrate when the operation of the electrode substrate is stopped, and cool the surface of the electrode substrate.

[0012] Technical Solution

[0013] According to one embodiment of the present invention, a drying device for electrode manufacturing includes: a conveying section, which is used to convey an electrode substrate; a heating section, which is used to apply heat to the electrode substrate being conveyed; a position adjustment section, which is used to adjust the position of the heating section; a first cooling section, which is used to spray air toward the electrode substrate located on the conveying section; and a control section, which is used to operate the first cooling section when the conveyance of the electrode substrate stops.

[0014] The first cooling unit may be configured to spray air toward a surface of the electrode base material located on the conveying unit.

[0015] In addition, the first cooling unit may include a plurality of air-jet units for respectively jetting air toward both sides of the electrode substrate on the conveying unit.

[0016] Furthermore, the position adjustment section may move the heating section in a direction approaching or moving away from the electrode base material on the conveying section.

[0017] Furthermore, when the conveyance of the electrode base material is stopped, the control portion may move the heating portion in a direction away from the electrode base material on the conveyance portion.

[0018] Furthermore, when the conveyance of the electrode base material is stopped, the control portion may stop the operation of the heating portion.

[0019] Furthermore, when the heating portion moves in a direction away from the electrode base material, the control portion may operate the first cooling portion.

[0020] Furthermore, the electrode manufacturing drying device may further include a second cooling unit for cooling the heating unit.

[0021] Furthermore, the control portion may be configured to operate the second cooling portion when the heating portion moves in a direction away from the electrode base material.

[0022] Furthermore, the heating part may include a heating lamp.

[0023] In addition, the heating part may include: an IR lamp; and a reflecting member for reflecting heat radiated from the IR lamp to the electrode base material.

[0024] Furthermore, the second cooling part may be configured to spray air into a space between the IR lamp and the reflecting member.

[0025] Furthermore, the control portion may control the operation of the heating lamp so that the heating lamp outputs at a constant wavelength range while the electrode base material is conveyed.

[0026] Furthermore, the control section may control the operation of the heating section so that the heating section operates at a constant output value while the electrode base material is conveyed.

[0027] In addition, the conveying part may include a plurality of rollers for running the electrode base material.

[0028] Beneficial Effects

[0029] As described above, the drying device for electrode production according to one embodiment of the present invention has the following effects.

[0030] When the operation of the electrode base material is stopped during the performance of the drying process, the electrode base material may be prevented from being overheated due to residual heat of the heating part.

[0031] Furthermore, when the operation of the electrode base material is stopped, the residual heat of the heating portion can be prevented from being transferred to the electrode base material, and the surface of the electrode base material can be cooled.

[0032] Furthermore, when the electrode base material is stopped and restarted, the temperature oscillation of the electrode base material can be prevented, and the temperature of the heating portion can be lowered in a short time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of a drying device for electrode manufacturing according to one embodiment of the present invention.

[0034] Figures 2 to 4 FIG. 1 is a schematic diagram for explaining an operation state of a drying device for producing an electrode according to an embodiment of the present invention.

[0035] Figure 5 It is a schematic diagram for explaining the second cooling unit.

[0036] Figure 6 It is a schematic diagram of the heating unit. DETAILED DESCRIPTION

[0037] Hereinafter, a drying apparatus for electrode manufacturing according to one embodiment of the present invention will be described with reference to the accompanying drawings.

[0038] In addition, regardless of the reference numerals, the same or corresponding components are given the same or similar reference numerals, and their repeated description will be omitted, and the size and shape of each component member as shown in the drawings may be exaggerated or reduced for convenience of explanation.

[0039] Figure 11 is a schematic configuration diagram of a drying device for electrode manufacturing (100, hereinafter also referred to as a "drying device") according to an embodiment of the present invention.

[0040] The electrode manufacturing drying device 100 according to one embodiment of the present invention includes a conveying unit 110, a heating unit 120, a position adjusting unit 140, and a first cooling unit 150. In addition, the electrode manufacturing drying device 100 may include the conveying unit 110, the heating unit 120, the position adjusting unit 140, the first cooling unit 150, and the second cooling unit 160.

[0041] Figures 2 to 4 1 is a schematic diagram for explaining an operating state of a drying device 100 for electrode manufacturing according to an embodiment of the present invention. Specifically, Figure 2 shows an operating state that allows the electrode substrate to be run (also referred to as conveyed) and to undergo a drying process, Figure 3 shows an operating state in which the operation of the electrode substrate is stopped during the drying process, and Figure 4 The operating state of the first cooling unit when the operation of the electrode substrate is stopped is shown.

[0042] The drying device 100 includes a conveying section 110 for conveying an electrode substrate, a heating section 120 (120a, 120b) for applying heat to the electrode substrate 1 being conveyed, a position adjusting section 140 for adjusting the position of the heating section 120, a first cooling section 150 for spraying air toward the electrode substrate 1 located on the conveying section 110, and a control section 170 for operating the first cooling section 150 when the conveyance of the electrode substrate 1 is stopped.

[0043] The drying device 100 includes a drying chamber 110. The drying chamber 110 has an inlet 102 and an outlet 103, through which the electrode substrate 1 is input, and through which the electrode substrate 1 that has completed the drying process is discharged to the outside. The electrode substrate 1 has a coating portion to which the electrode slurry is applied and an uncoated portion to which the electrode slurry is not applied. The coating portion of the electrode substrate 1 may be provided on one side or both sides of the electrode substrate 1.

[0044] The drying chamber 110 provides a space for performing a drying process of the electrode base material 1. The transfer part 110, the heating part 120 (120a, 120b), the position adjustment part 140, and the first cooling part 150 are disposed in the inner space of the drying chamber 110.

[0045] The transfer part 110 may include a plurality of rollers 111 for running the electrode substrate 1. The plurality of rollers 111 may be arranged in the drying chamber 110 so that the electrode substrate 1 moves while changing its running direction multiple times within the drying chamber 101.

[0046] The heating part 120 may include a heating lamp. In addition, the heating lamp may be an IR (infrared) lamp. When power is applied to the heating lamp, heat from the heating lamp is guided to the electrode base material 1, and drying of the electrode base material 1 is performed.

[0047] The heating unit 120 may be disposed on one side or both sides of the electrode substrate 1 along the running direction M of the electrode substrate 1 in the drying chamber 101. Figure 2 The heating parts 120 (120a, 120b) may be respectively disposed on both sides 2, 3 of the electrode substrate along the running direction M of the electrode substrate 1. That is, a plurality of heating parts 120 may be disposed in the drying chamber 101, and the plurality of heating parts 120 may be spaced apart from each other at predetermined intervals along the running direction M of the electrode substrate 1.

[0048] Reference Figure 2 , herein, the heating portion configured to provide heat toward the first surface 2 of the electrode substrate 1 may be referred to as a first heating portion 120b, and the heating portion configured to provide heat toward the second surface 3 in the opposite direction of the first surface 2 of the electrode substrate may be referred to as a second heating portion 120a. The first heating portion 120b and the second heating portion 120a have the same structure, which can be distinguished according to their positions within the drying chamber 101.

[0049] In addition, the position adjusting part 140 is configured to move the heating part in a direction close to or away from the electrode substrate 1 located on the conveying part 110. The position adjusting part 140 may be configured to include a cylinder or a motor, etc. The position adjusting part 140 may be controlled by the control part 170, and the position adjusting part 140 may be configured to adjust the position of the heating part 120 when the electrode substrate 1 is conveyed in the drying chamber 101 and when the operation of the electrode substrate 1 is stopped.

[0050] As an example, refer to Figure 2 and Figure 3 , a position adjusting portion 140 may be provided to adjust the position of the first heating portion 120b so as to provide heat toward the first surface 2 of the electrode substrate 1. In this structure, the second heating portion 120a for providing heat toward the second surface 3 of the electrode substrate 1 may be a fixed-position heating portion, and the first heating portion 120b connected to the position adjusting portion 140 may be a variable-position heating portion.

[0051] In addition, the first cooling unit 150 may be configured to spray air toward the surface (one side or both sides) of the electrode substrate 1 located on the conveying unit 110. Figure 4 The first cooling unit 150 may include a plurality of air jets for respectively jetting air toward the two sides 2 and 3 of the electrode substrate 1 on the conveying unit. At this time, the plurality of air jets may be arranged at predetermined intervals in the drying chamber 101 along the running direction of the electrode substrate 1.

[0052] When the first cooling unit 150 sprays air onto the surface of the electrode substrate, it can provide an air curtain to prevent residual heat from being transferred from the heating unit 120 (120a, 120b) to the electrode substrate. In addition, the first cooling unit 150 can perform a function of controlling the temperature of the electrode substrate by cooling the electrode substrate 1 when spraying air onto the surface of the electrode substrate.

[0053] In addition, when the conveyance of the electrode base material 1 is stopped, the control part 170 may move the heating part 120 in a direction away from the electrode base material 1 located on the conveying part 110. Figure 3 As an example, when the conveyance of the electrode substrate 1 stops, the control part 170 may move the second heating part 120 b in a direction away from the electrode substrate 1 on the conveying part 110 .

[0054] In addition, when the conveyance of the electrode base material 1 is stopped, the control part 170 may stop the operation of the heating part 120 ( 120 a , 120 b ).

[0055] Reference Figure 3 and Figure 4 When the heating part 120 b moves in a direction away from the electrode substrate 1 , the control part 170 may operate the first cooling part 150 .

[0056] In summary, when the operation of the electrode base material 1 in the drying chamber 101 stops, the control part 170 stops the operation of the heating part 120 .

[0057] However, even when the operation of the heating part 120 is stopped, the residual heat Q of the heating part 120 is transferred to the surface of the electrode substrate 1. In order to prevent this, the control part 170 is provided so that when the conveyance of the electrode substrate 1 is stopped, the control part 170 moves the heating part 120b in a direction away from the electrode substrate 1 located on the conveying part 110, and when the heating part 120b moves in a direction away from the electrode substrate 1, the control part 170 operates the first cooling part 150.

[0058] At this time, when the first cooling section 150 sprays air toward the surface of the electrode substrate 1, an air curtain can be provided to prevent the residual heat Q from the heating section 120 (120a, 120b) from being transmitted to the electrode substrate 1, and when it sprays air toward the surface of the electrode substrate 1 at the same time, the electrode substrate 1 can be cooled.

[0059] In addition, refer to Figure 2 When the electrode substrate 1 in the drying chamber 1 is running, the control unit 170 can stop the operation of the first cooling unit 150, and the control unit 170 can move the heating unit 120b in a direction closer to the electrode substrate 1, operate the heating unit 120, and perform the drying process of the electrode substrate 1.

[0060] In addition, the drying apparatus 100 for manufacturing an electrode may include a second cooling unit 160 for cooling the heating unit 120 .

[0061] Figure 5 is a schematic diagram for explaining the second cooling unit 160, Figure 6 It is a schematic diagram of the heating unit.

[0062] The second cooling part 160 sprays air into the heating part 120 to perform a function of lowering the temperature of the heating part 120 in a short time.

[0063] As an example, when the operation of the electrode substrate is stopped, when the heating part 120 b moves in a direction away from the electrode substrate 1 , the control part 170 may be configured to operate the second cooling part 160 .

[0064] Reference Figure 5 and Figure 6 , the heating part 120 b may include an IR lamp 123 and a reflective member 125 for reflecting heat radiated from the IR lamp 123 to the electrode base material.

[0065] Also, a second cooling part 160 may be provided to spray air into the space 127 between the IR lamp 123 and the reflective member 125 .

[0066] In addition, the control part 170 may control the operation of the heating lamp 123 so that the heating lamp 123 outputs within a constant wavelength range while the electrode base material 1 is being conveyed.

[0067] In addition, the control part 170 may control the operation of the heating part so that the heating part operates at a constant output value while the electrode base material 1 is conveyed.

[0068] The preferred embodiments of the present invention described above are disclosed for illustrative purposes, and a person skilled in the art can make various modifications, changes and additions within the spirit and scope of the present invention, and these modifications, changes and additions should be deemed to fall within the scope of the claims.

[0069] Industrial Applicability

[0070] According to the drying apparatus for manufacturing an electrode according to one embodiment of the present invention, when the operation of the electrode base material is stopped during the drying process, the electrode base material can be prevented from being overheated due to the residual heat of the heating part.

Claims

1. A drying device for electrode manufacturing, comprising: A conveying part, the conveying part is used to convey the electrode substrate; a heating unit for applying heat to the electrode substrate being conveyed; A position adjustment unit, the position adjustment unit is used to adjust the position of the heating unit; a first cooling unit configured to spray air toward the electrode substrate on the conveying unit; as well as A control unit is configured to operate the first cooling unit when the conveyance of the electrode substrate is stopped.

2. The drying device for electrode production according to claim 1, wherein: The first cooling unit is provided to spray air toward the surface of the electrode base material located on the conveying unit.

3. The drying device for electrode production according to claim 2, wherein: The first cooling unit includes a plurality of air-jet units for respectively jetting air toward both sides of the electrode substrate on the conveying unit.

4. The drying device for electrode production according to claim 2, wherein: The position adjustment portion moves the heating portion in a direction approaching or moving away from the electrode base material located on the conveying portion.

5. The drying device for electrode production according to claim 4, wherein: When the conveyance of the electrode base material is stopped, the control portion moves the heating portion in a direction away from the electrode base material on the conveyance portion.

6. The drying device for electrode production according to claim 5, wherein: When the conveyance of the electrode base material is stopped, the control part stops the operation of the heating part.

7. The drying device for electrode production according to claim 5, wherein: The control part operates the first cooling part when the heating part moves in a direction away from the electrode base material.

8. The drying device for electrode manufacturing according to claim 5, further comprising: A second cooling part, wherein the second cooling part is used to cool the heating part.

9. The drying device for electrode production according to claim 8, wherein: The control part operates the second cooling part when the heating part moves in a direction away from the electrode base material.

10. The drying device for electrode production according to claim 8, wherein: The heating unit includes a heating lamp.

11. The drying device for electrode production according to claim 8, wherein: The heating unit comprises: IR lights; and A reflective member for reflecting heat radiated from the IR lamp toward the electrode substrate.

12. The drying device for electrode production according to claim 11, wherein: The second cooling part is configured to spray air into a space between the IR lamp and the reflecting member.

13. The drying device for electrode production according to claim 1, wherein: The control portion controls the operation of the heating lamp so that the heating lamp outputs at a constant wavelength range while the electrode base material is conveyed.

14. The drying device for electrode production according to claim 1, wherein: The control section controls the operation of the heating section so that the heating section operates at a constant output value while the electrode base material is conveyed.

15. The drying device for electrode production according to claim 1, wherein: The conveying part includes a plurality of rollers for running the electrode substrate.

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