System for drying electrodes and method of manufacturing electrodes

Abstract

The invention relates to a system for drying an electrode and a method for manufacturing an electrode, and the system is used for manufacturing an electrode. A system for drying an electrode includes a coil disposed along a path of movement of the electrode. The electrode comprises a base layer made of metal and an electrode active material coated on the base layer. A current may be applied to the coil.

Description

Technical Field

[0001] The present invention relates to a method of manufacturing a battery electrode and a system for drying an electrode, wherein the system is used for manufacturing an electrode. Background Art

[0002] Recently, secondary batteries have been increasingly used in electronic devices, electric vehicles, energy storage devices, etc. Examples of widely used secondary batteries include lithium ion batteries.

[0003] An electrode for a secondary battery can be manufactured by a wet process. Specifically, in the wet process, a powder is prepared by mixing an electrode active material, a binder, and a conductive material, and a slurry is manufactured by mixing the powder with a solvent. Further, the current collector or substrate is coated with the slurry and then the slurry is dried.

[0004] The electrode can be dried by an induction heating device. In this case, since a separate induction heating device is required, the complexity of the equipment increases. Also, since there is no external heat source, excessive current is applied, which causes frequent oxidation of the electrode sheet.

[0005] The electrode can also be heated by infrared rays. When the electrode is heated by infrared rays, problems exist in that the infrared lamps occupy space in the equipment, an electrode moving route of a predetermined length or longer is required, it is difficult to design the layout of the equipment, and the size of the equipment increases.

[0006] The above information disclosed in this background art section is only for enhancing the understanding of the background of the present invention. Therefore, the background art section may contain information that does not form the prior art known to those of ordinary skill in the art. Summary of the Invention

[0007] The present invention is directed to solving the above problems. An object of the present invention is to provide a system for drying an electrode, which can simplify the equipment required for drying the electrode and minimize the size of the equipment.

[0008] The present invention is also directed to providing a system for drying an electrode, wherein the system can shorten the drying time.

[0009] The present invention is also directed to providing a system for drying an electrode, wherein the system can prevent the electrode from overheating or oxidizing during the process of drying the electrode.

[0010] The present invention is also directed to providing a method of manufacturing an electrode, the method including a process of drying the electrode. In particular, the present invention is directed to providing a method of manufacturing an electrode by using the disclosed system for drying an electrode.

[0011] The object of the present invention is not limited to the above object. Those of ordinary skill in the art to which the present invention pertains can more clearly understand other objects not mentioned above from the following description.

[0012] The features of the present invention for achieving the above object and the characteristic functions of the present invention to be described below are as follows.

[0013] In one aspect, the present invention provides a system for drying an electrode. The system includes a coil. The coil is arranged along the moving route of the electrode, and the electrode includes a base layer made of metal and an electrode active material coated on the base layer. A current can be applied to the coil.

[0014] In another aspect, the present invention provides a method for manufacturing an electrode. The method includes: supplying an electrode along a moving route through an unwinding machine; applying a variable current to a coil arranged along the moving route.

[0015] The present invention provides a system for drying an electrode, wherein the system can dry the electrode in the system without a separate induction heating device, thereby simplifying the equipment required for drying the electrode and minimizing the size of the equipment.

[0016] The present invention provides a system for drying an electrode, wherein the system can simultaneously dry the outer side and the inner side of the electrode, thereby shortening the drying time.

[0017] The present invention provides a system for drying an electrode, wherein the system can adjust the current applied to the induction coil in combination with the traveling speed of the electrode, thereby preventing the electrode from overheating or oxidizing during the process of drying the electrode.

[0018] The present invention provides a method for manufacturing an electrode. The method includes a process of drying an electrode. In particular, the present invention provides a method for manufacturing an electrode, wherein the method uses a system for drying an electrode.

[0019] The effects of the present invention are not limited to the above effects. Other effects not mentioned above should be more clearly understood by those of ordinary skill in the art from the following description.

[0020] Other aspects and embodiments of the present invention are discussed herein.

[0021] It should be understood that the term "vehicle" or "vehicular" or other similar terms used herein generally include motor vehicles. Such motor vehicles can include passenger vehicles including sport utility vehicles (SUVs), buses, trucks, various commercial vehicles, vessels including various boats and ships, aircraft, and the like. Such motor vehicles can also include hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles, and other alternative fuel vehicles (e.g., fuels derived from energy sources other than petroleum). As described herein, a hybrid vehicle is a vehicle having two or more power sources, e.g., a vehicle having both gasoline power and electric power.

[0022] The above and other features of the present invention are discussed herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other features of the present invention will be described in detail hereinafter with reference to certain embodiments shown in the accompanying drawings, which are given by way of example only. Accordingly, the drawings do not limit the present invention, wherein:

[0024] Figure 1 is a schematic view of a system for drying an electrode according to an embodiment of the present invention;

[0025] Figure 2 is a schematic view of a system for drying an electrode according to an embodiment of the present invention;

[0026] Figure 3 is a perspective view of a coil of a system for drying an electrode according to an embodiment of the present invention;

[0027] Figure 4 is a schematic view showing the principle of heating a base layer of an electrode by a coil of a system for drying an electrode according to an embodiment of the present invention;

[0028] Figure 5 is a schematic view showing the relationship between a coil disposed in a roller and a traveling electrode in a system for drying an electrode according to an embodiment of the present invention;

[0029] Figure 6 is a perspective view showing the direction of disposing a coil relative to a traveling electrode in a system for drying an electrode according to an embodiment of the present invention;

[0030] Figure 7 is Figure 6 a front view of the coil and the electrode;

[0031] Figure 8 is a schematic view showing the relationship between a heating plate and a traveling electrode in a system for drying an electrode according to an embodiment of the present invention;

[0032] Figure 9 FIG. is a schematic view showing a state in which an electrode active material layer of an electrode is heated and the electrode travels in a system for drying an electrode according to an embodiment of the present invention;

[0033] Figure 10 FIG. is a schematic view showing an arrangement relationship between a heating plate and a traveling electrode in a system for drying an electrode according to an embodiment of the present invention;

[0034] Figure 11 FIG. is a schematic view showing moisture and solvent present in an electrode before drying the electrode by a system for drying an electrode according to an embodiment of the present invention;

[0035] Figure 12 FIG. is a schematic view showing a state in which moisture and solvent remaining in the electrode are removed after drying the electrode by a system for drying an electrode according to an embodiment of the present invention; Figure 11 of the electrode;

[0036] Figure 13 FIG. is a schematic view showing a system for drying an electrode including a housing according to an embodiment of the present invention;

[0037] Figure 14 FIG. is a schematic view showing a system for drying an electrode including a cooler according to an embodiment of the present invention;

[0038] Figure 15 FIG. is a schematic view showing a system for drying an electrode including a shielding member according to an embodiment of the present invention;

[0039] Figure 16A FIG. is a schematic view of a part of a system for drying an electrode according to an embodiment of the present invention, in which a coil is provided outside a roller; and

[0040] Figure 16B FIG. is Figure 16A a front view of a part of the system of.

[0041] It should be understood that the drawings are not necessarily drawn to scale, but rather are a suitable simplified representation of the various features embodying the basic principles of the present invention. The specific design features of the present invention disclosed herein (including, for example, specific dimensions, orientations, positions, and shapes) will be determined in part by the particular application and use environment.

[0042] In these figures, like reference numerals represent the same or equivalent components of the present invention throughout the several views of the drawings. DETAILED DESCRIPTION OF THE INVENTION

[0043] In the following, various embodiments of the present invention are described in detail. Examples of these embodiments are presented in the accompanying drawings and described as follows. Although the technical concept of the present invention is described in connection with various embodiments, it should be understood that this specification is not intended to limit the present invention to those embodiments. On the contrary, the present invention is intended to cover not only the disclosed embodiments, but also various alternative embodiments, modified embodiments, equivalent embodiments, and other embodiments that may be included within the spirit and scope of the present invention as defined by the appended claims.

[0044] For the purpose of explaining only the embodiments according to the concept of the present invention, specific structural and functional descriptions presented in the embodiments of the present invention are illustrated. Embodiments according to the concept of the present invention can be implemented in various forms. In addition, the present invention should not be construed as being limited to the embodiments disclosed in this specification. It should be understood that the present invention includes all modifications, equivalent ways, and substitutions included within the spirit and technical scope of the present invention.

[0045] Meanwhile, terms such as "first" and / or "second" in the present invention may be used to describe various constituent elements, but these constituent elements should not be limited by these terms. These terms are only used for the purpose of distinguishing one constituent element from other constituent elements. For example, without departing from the scope of the concept according to the present invention, the first constituent element may be referred to as the second constituent element, and similarly, the second constituent element may also be referred to as the first constituent element.

[0046] When a constituent element is described as "coupled" or "connected" to another constituent element, it should be understood that one constituent element can be directly coupled or connected to another constituent element, and there may also be intermediate constituent elements between the constituent elements. When a constituent element is described as "directly coupled" or "directly connected" to another constituent element, it can be understood that there are no intermediate constituent elements between the constituent elements. Other expressions used to explain the relationship between constituent elements, namely "between" and "only between" or "adjacent" and "directly adjacent", should be interpreted in a similar manner.

[0047] Throughout the specification, the same reference numerals indicate the same constituent elements. Meanwhile, the terms used in this specification are used to explain the embodiments and not to limit the present invention. Unless otherwise specifically stated in this specification, the singular form also includes the plural form. Terms used in the specification, such as "comprising" and / or "including" and their variants, are intended to indicate the existence of the above-mentioned constituent elements, steps, operations, and / or elements. Such terms do not exclude the existence or addition of one or more other constituent elements, steps, operations, and / or elements.

[0048] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. When components, devices, elements, controllers, etc. of the present invention are described as having a purpose or performing an operation, function, etc., the component, device, element, or controller should be regarded as "configured to" meet the said purpose or perform the said operation or function herein. Terms such as unit, module, device, controller, etc. may refer to one or more units for processing at least one function or operation, and may be implemented by hardware, software, or a combination thereof. The operation of the function described in the form disclosed herein may be directly embodied in a hardware or software module executed by a processor, or directly embodied in their combination.

[0049] As Figure 1 and Figure 2 shown, the electrode 200 can be supplied to the system 100 for drying the electrode according to the present invention. In an embodiment, the electrode 200 can be supplied by an unwinder 110 (the electrode 200 is wound around the unwinder 110 in the form of a roll). The electrode 200 can be continuously supplied by the rotation of the unwinder 110. The electrode 200 dried by the drying system 100 can be wound again into a roll form by a winder 120.

[0050] The electrode 200 can be an electrode for a secondary battery. For example, the secondary battery can be a lithium-ion battery. The electrode 200 can include an electrode active material 220 and a base layer 240. The electrode active material 220 can further include a binder, a conductive material, etc. The base layer 240 can be formed of a metal foil made of aluminum, copper, etc., and coated with the electrode active material 220. One side or both sides of the base layer 240 can be coated with the electrode active material 220 to manufacture the electrode 200. In an embodiment, the electrode 200 can be a cathode or an anode. An electrode tab 260 for electrically connecting the electrode to an external component can be provided on the base layer 240 of the electrode 200.

[0051] One or more rollers 130 can be provided between the unwinder 110 and the winder 120. The roller 130 can be a freely rotating roller. The roller 130 can guide the electrode 200 moving from the unwinder 110 towards the winder 120. For example, the roller 130 can be provided at a preset position along the moving route of the electrode 200 and guide the electrode 200.

[0052] The drying system 100 can include an edge position control (EPC) device 132. The EPC device 132 can prevent the snaking movement of the electrode 200 by controlling the position of the end of the electrode 200 moving in the drying system 100.

[0053] According to the present invention, the electrode 200 is dried in the drying system 100. Heat can be applied to the electrode 200, and the electrode 200 can be dried by the heat applied to the electrode 200. Specifically, the residual solvent and moisture present in the electrode 200 can be evaporated and removed by the drying system 100.

[0054] The drying system 100 can dry both the inner side of the electrode 200 (i.e., the base layer 240) and the outer side of the base layer 240 (i.e., the electrode active material layer 220). To this end, according to an embodiment of the present invention, the drying system may include one or more coils 140 and one or more heating plates 150.

[0055] In an embodiment, the drying system 100 includes one or more coils 140. In an embodiment, the coil 140 may be disposed inside each roller 130. In another embodiment, the coil 140 may be disposed around the moving electrode 200 without being inserted into the roller 130.

[0056] Refer to Figure 3 and Figure 4 , each coil 140 is configured to receive a current I. The base layer 240 of the electrode 200 can be inductively heated by the coil 140 to which the current I is applied. A high-frequency alternating current I can be applied to the coil 140, and the coil 140 can form a magnetic field M through the applied current I. When the high-frequency alternating current I is applied to the coil 140, a high-frequency magnetic field M is formed through the coil 140, such that an induced current can flow in the base layer 240 of the electrode 200 located in the high-frequency magnetic field. Then, heat can be generated through the resistance present in the base layer 240. Specifically, Joule heat can be generated in the base layer 240 by the electric power obtained by multiplying the square of the current I by the resistance. Each coil 140 can be formed and utilized similarly.

[0057] Refer to Figure 5 , one or more coils 140 may be disposed on the moving route of the electrode 200 and installed in one or more rollers 130. The coil 140 may be inserted into at least some or all of the rollers 130 disposed along the moving route. In an embodiment, the coil 140 may be detachably installed in each roller 130. Since each roller 130 is detachable, the corresponding coil 140 can be easily maintained, and the heating position can be easily changed. The coil 140 may be fixed at a preset position inside the roller 130, and the distance between the coil 140 and the electrode can be constantly maintained. In an embodiment, the roller 130 may be made of a metal or resin-based material having a low magnetic permeability and low magnetic field shielding characteristics.

[0058] The induced current is generated in the base layer 240 by a magnetic field M generated by one or more coils 140 in one or more rollers 130. To this end, as Figure 6 and Figure 7 shown, the moving direction of the electrode 200 can be perpendicular to the direction of the magnetic field M formed by the coil 140. The induced current flowing in the base layer 240 generates heat due to the resistance of the base layer 240, thereby heating the base layer 240.

[0059] As Figure 8 shown, the drying system 100 may include one or more heating plates 150. The heating plates 150 may be arranged along the moving route of the electrode 200. In the case where the electrode active material 220 is coated on one side of the base layer 240, one heating plate 150 may be arranged to face the electrode active material 220. In the case where the electrode active material 220 is coated on both sides of the base layer 240, two heating plates 150 may be arranged to face the electrode active materials 220 respectively coated on the two surfaces of the base layer 240.

[0060] Referring to Figure 9 , the heating plate 150 can heat the electrode active material 220 of the electrode 200. In an embodiment, the heating plate 150 can heat the electrode active materials 220 coated on each surface of the base layer 240 simultaneously.

[0061] As Figure 10 shown, each heating plate 150 may be arranged to be spaced apart from the electrode 200 by a predetermined gap G. As described below, the heating plate 150 is movably arranged around the electrode 200 so that the gap G can be adjusted. In addition, the distance between the heating plate 150 and the electrode 200 at the set position can be constantly maintained.

[0062] Referring to Figure 11 and Figure 12 , the electrode active material 220 can be dried when heated by the heating plate 150. The moisture A1 remaining in the electrode active material 220 and the remaining solvent A2 can be evaporated and removed by the operation of the heating plate 150.

[0063] Returning to refer to Figure 1 , the controller 160 of the drying system 100 is configured to control and supervise the operation of the drying system 100.

[0064] The controller 160 can detect the traveling speed of the electrode 200. For example, the controller 160 can receive information about the rotational speed of the winder 120 and / or the unwinder 110. In an embodiment, the drying system 100 can be equipped with speed sensors configured to detect the speeds of the winder 120 and the unwinder 110. The information about the rotational speed detected by the speed sensors can be transmitted to the controller 160, and the controller 160 can adjust the rotational speeds of the winder 120 and the unwinder 110. In an embodiment, the drying system 100 can be equipped with speed sensors configured to detect the traveling speed of the electrode 200 moving along the moving route. The controller 160 can detect the traveling speed of the electrode 200 based on the traveling speed detected by the speed sensors.

[0065] The controller 160 can also control the operation of the coil 140. The controller 160 is electrically connected to the coil 140 and applies an alternating current I to the coil 140. The controller 160 can adjust the current I to be applied. In addition, the controller 160 can operate in combination with the traveling speed of the electrode 200 and automatically adjust the alternating current to be applied to the coil 140.

[0066] In an embodiment, the controller 160 can control the operation of the heating plate 150. Temperature sensors can be provided around each heating plate 150. The ambient temperature detected by the temperature sensors can be transmitted to the controller 160. The controller 160 can adjust the operation of the heating plate 150 based on the received ambient temperature. For example, the controller 160 can adjust the heating time, heating frequency, heating intensity, etc. of the heating plate 150.

[0067] In some embodiments, the position of the heating plate 150 relative to the traveling electrode 200 can be adjusted. For example, drive devices can be provided on each or both of the heating plates 150, and the position of the heating plate 150 relative to the electrode 200 can be adjusted. The drive devices can move the heating plate 150 in a direction towards or away from the electrode 200. For example, the drive devices can be linear drive devices such as ball screw devices. The controller 160 can adjust the position of the heating plate 150 by using the drive devices based on the physical condition of the electrode 200, the detected ambient temperature, etc.

[0068] Referring to Figure 13 , according to an embodiment of the present invention, the drying system 100 includes a housing 310. The housing 310 can shield the part where the coil 140 and / or the heating plate 150 of the moving route of the electrode 200 are arranged. Before the electrode 200 is heated, the electrode 200 enters the housing 310. The electrode 200 passing through the housing 310 can move to the outside of the housing 310 and be wound by the winder 120.

[0069] The interior of the housing 310 can be filled with a gas capable of preventing oxidation. An example of a gas capable of preventing oxidation can be nitrogen. In the housing 310 filled with a gas capable of preventing oxidation, the heated electrode sheet 260 prevents reaction with oxygen, thereby preventing oxidation. In an embodiment, the housing 310 has an injection port 320 through which a gas capable of preventing oxidation can be injected.

[0070] As Figure 14 shown, according to an embodiment of the present invention, the drying system 100 includes a cooler 330. After the electrode 200 is heated by one or more coils 140 or a heating plate 150, the cooler 330 can cool the surface of the heated electrode 200. The cooled electrode 200 can be wound by a winder 120. For example, the cooler 330 can be disposed upstream of the winder 120. The cooler 330 can cool the electrode sheet 260 and prevent oxidation of the electrode sheet 260. While the electrode 200 is being wound by the winder 120, the cooler 330 can remove local residual heat to easily maintain the tension of the electrode 200. Additionally, since the temperature of the surface of the electrode 200 is not high after the electrode 200 is wound by the winder 120, an operator can easily handle the electrode 200. The cooler 330 can employ various cooling types. For example, the cooler 330 can cool the electrode 200 by using a refrigerant, or an air-cooled or water-cooled cooler 330 can be used.

[0071] As Figure 15 shown, according to an embodiment of the present invention, the drying system 100 includes a shielding member 350. The shielding member 350 can be arranged to block a magnetic field M applied to a part of the electrode 200 by one or more coils 140. For example, the shielding member 350 can be arranged to mask a part of the electrode sheet 260 to block the magnetic field applied to the electrode sheet 260. Thus, the shielding member 350 can prevent the induced current generated on the electrode sheet 260 and keep the electrode sheet 260 at a low temperature, thereby preventing oxidation of the electrode 200. The shielding member 350 can be made of a ferromagnetic element having a high magnetic permeability. For example, the ferromagnetic element can be made of iron, nickel, etc. The ferromagnetic element material can reduce the density of peripheral magnetic field lines by absorbing the magnetic field.

[0072] As described above, referring to Figure 16A and Figure 16B , each coil 140 can be disposed around the electrode 200 without being inserted into the roller 130. The coil 140 can be fixed to an external structure by a support structure 340. The distance D between the electrode 200 and the coil 140 can be adjusted by changing the position of the support structure 340. In an embodiment, the support structure 340 can rotatably mount the coil 140. Thus, the angle of the coil 140 relative to the electrode 200 can be adjusted.

[0073] Return to the reference below Figure 2 Describe the process of drying an electrode by using the system 100 for drying an electrode according to the present invention.

[0074] As described above, the drying system 100 can perform a roll-to-roll process. The electrode 200 wound in the form of a roll is unwound by the unwinder 110. The snaking movement of the electrode 200 is prevented by the EPC device 132. The electrode 200 travels along a predetermined movement route while maintaining tension through a tension adjustment mechanism (e.g., a loose and tight adjusting roller).

[0075] The electrode 200 traveling along the movement route encounters the coil 140 or the coil 140 provided in the roller 130. An induced current is formed in the base layer 240 of the electrode 200 by the magnetic field generated by the current I applied to the coil 140. Therefore, the base layer 240 can be heated.

[0076] The electrode 200 moving along the movement route encounters the heating plate 150 which is an external heating source for the electrode 200. The heating plate 150 can dry the electrode active material 220 by applying heat to the electrode active material 220. Therefore, the moisture and solvent remaining in the electrode 200 can be removed. The electrode 200 that has been dried as described above can be wound by the winder 120.

[0077] The method of manufacturing an electrode according to an embodiment of the present invention includes a process of drying an electrode. In the embodiment, the drying process can be performed by the drying system 100.

[0078] The electrode according to an embodiment of the present invention can be manufactured by the manufacturing method. In the embodiment, the drying system 100 can dry the electrode in the process of manufacturing the electrode.

[0079] According to an embodiment of the present invention, the battery includes an electrode. In the embodiment, the battery can be a secondary battery.

[0080] The system for drying an electrode according to the present invention can shorten the processing time required for drying the electrode and improve the productivity of the electrode. According to the present invention, both the internal base layer and the external active material of the electrode are heated. Therefore, the heating efficiency can be improved, the base layer can be quickly heated by induction heating, and the output can be easily adjusted.

[0081] According to the present invention, since the heat is evenly distributed inside and outside the electrode, the generation of stress caused by unbalanced thermal expansion can be reduced. This can provide advantages in maintaining tension during the process and improving the quality of the electrode.

[0082] In the system for drying an electrode according to the present invention, the induction heating coil can be disposed in the idle roller, thereby reducing the complexity of the equipment and facilitating the management and maintenance of the equipment.

[0083] In addition, in the system for drying an electrode according to the present invention, the heating efficiency can be high, the traveling distance of the electrode can be short, the exposure range of the electrode can be small, and the possibility of foreign matter entering from the outside can be reduced.

[0084] According to the present invention, a separate device or chamber for heating the electrode is not required. Therefore, the traveling distance of the electrode can be reduced, thereby reducing the size of the equipment.

[0085] In the related art, the electrode is dried only by an external heat source. Therefore, the electrode needs to be exposed to the heat source for a relatively long period of time to dry the electrode. For this purpose, the electrode is configured to travel while turning at a large angle, which increases the traveling distance of the electrode. However, since the tension applied to the electrode increases as the turning angle increases, the difficulty of managing the equipment and the probability of electrode defects occurring increase. However, according to the present invention, since both the inner and outer sides of the electrode are rapidly heated, the movement route of the electrode can be reduced and a small turning angle can be maintained while the electrode is moving, as compared with the related art.

[0086] According to the present invention, the current amount of the induction coil can be finely adjusted in real time in combination with the traveling speed of the electrode. Thereby preventing overheating of the base layer of the electrode and oxidation of the electrode sheet.

[0087] Since the system for drying an electrode according to the present invention includes a heating plate as an external heat source and an induction coil, even if the current amount of the induction coil is not excessive, a satisfactory drying effect can be obtained, and at the same time, oxidation of the electrode sheet can be prevented.

[0088] The technical concept of the present invention described above is not limited by the above embodiments and drawings. Those of ordinary skill in the art to which the present invention pertains should be clear that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention.

[0089] The technical concept of the present invention has been described in detail with reference to various embodiments of the present invention. However, those of ordinary skill in the art will understand that changes can be made in these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined in the appended claims and their equivalents.

Claims

1. A system for drying an electrode, the system comprising: The coil is arranged along the moving path of the electrode, The electrode comprises a base layer made of metal and an electrode active material coated on the base layer. Therein, an electric current can be applied to the coil.

2. The system for drying an electrode according to claim 1, wherein: The coil is fixed to the support structure and is configured to rotate.

3. The system for drying an electrode according to claim 1, wherein: The coil is arranged in a roller, and the roller is arranged on a moving route of the electrode.

4. The system for drying an electrode according to claim 3, wherein: The roller is an idle roller configured to guide the electrode moving along a moving path.

5. The system for drying an electrode according to claim 3, wherein: The coil is disposed within the roller and is detachable from the roller.

6. The system for drying an electrode according to claim 1, wherein: The coil is arranged to generate a magnetic field in a direction perpendicular to the moving direction of the electrode.

7. The system for drying an electrode according to claim 1, wherein: An edge position control device configured to prevent serpentine motion of the electrode is disposed on the moving path.

8. The system for drying an electrode according to claim 1, further comprising: A heating plate is arranged along the moving path of the electrode.

9. The system for drying an electrode according to claim 8, wherein: The position of the heating plate relative to the electrode is adjustable.

10. The system for drying an electrode according to claim 8, further comprising: an unwinder configured to move the electrode to be wound in the form of a roll along a moving path; and A winding machine is configured to wind the electrode having passed through the coil and the heating plate into a roll form.

11. The system for drying an electrode according to claim 8, further comprising: A controller is configured to control the operation of the coil and the operation of the heating plate.

12. The system for drying an electrode according to claim 11, wherein: The controller is configured to detect a travel speed of the electrode and adjust the current based on the detected travel speed.

13. The system for drying an electrode according to claim 11, wherein: The controller is configured to detect a temperature around the movement route, and is configured to control an operation of the heating plate based on the detected temperature.

14. The system for drying an electrode according to claim 8, further comprising: a housing configured to shield the area where the coil and the heating plate are located, The interior of the shell is filled with a gas capable of preventing oxidation.

15. The system for drying an electrode according to claim 8, further comprising: A cooler is configured to cool the electrode passing through the coil and the heating plate.

16. The system for drying an electrode according to claim 1, wherein: The shielding member is disposed at a position on the moving route where the electrode encounters the coil, and wherein the shielding member is configured to block a magnetic field generated by the coil with respect to a portion of the electrode.

17. A method for manufacturing an electrode, the method comprising: The electrodes are supplied along a moving path by an unwinder; The electrodes are dried by applying a variable electric current to a coil arranged along the path of movement.

18. The method for manufacturing an electrode according to claim 17, further comprising: Operate the heating plates arranged along the moving path.

19. The method for manufacturing an electrode according to claim 18, further comprising: The electrode having passed through the coil and the heating plate is wound in the form of a roll by a winding machine.

20. The method for manufacturing an electrode according to claim 19, further comprising: Before winding the electrode, the electrode is cooled by a cooler.

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