Electrode manufacturing apparatus and electrode manufacturing method

Abstract

An electrode manufacturing apparatus according to one embodiment of the present invention includes a box-shaped cast having an internal space for accommodating an electrode slurry and a current collector, an electrode slurry inlet for injecting the electrode slurry into the internal space, and a current collector inlet for injecting the current collector into the internal space, and a heat source configured to heat the cast to dry the electrode slurry filled inside the cast, wherein the current collector inlet is located at the center of a first surface of the cast on which the current collector inlet is formed in order to layer the electrode slurry on both sides of the current collector, and the cast is configured to press the electrode slurry toward the current collector to roll the electrode slurry layered on both sides of the current collector.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0116626, filed on September 4, 2023.

[0002] The present invention relates to an apparatus and method for manufacturing an electrode for a lithium secondary battery, and more particularly to an apparatus and method for manufacturing an ultra-high loading electrode. [Background technology]

[0003] As technological development and demand for mobile devices increases, the demand for secondary batteries as an energy source is rapidly increasing. In recent years, the use of secondary batteries as a power source for electric vehicles (EVs) and hybrid electric vehicles (HEVs) has become a reality, and among such secondary batteries, there is a high demand for lithium secondary batteries, which have high energy density, high discharge voltage, and output stability.

[0004] In particular, lithium secondary batteries used as power sources for electric vehicles (EVs) and hybrid electric vehicles (HEVs) are required to have high energy density and the ability to generate large output in a short period of time.

[0005] In general, a lithium secondary battery is manufactured by using a material capable of inserting and extracting lithium ions as an anode and a cathode, and filling an organic electrolyte solution or a polymer electrolyte solution between the cathode and the anode. Electrical energy is generated by an oxidation-reduction reaction when lithium ions are inserted into and extracted from the cathode and the anode.

[0006] In this case, the negative electrode and the positive electrode each include an electrode active material layer on a current collector of the electrode. Such electrodes can be manufactured by mixing and stirring an electrode active material with a binder and a solvent, and optionally a conductive material and a dispersant, to prepare an electrode slurry, and then applying the electrode slurry onto a current collector using a slot die coater, followed by drying and rolling.

[0007] In recent years, as the demand for secondary batteries having high energy density increases, there has been an increasing trend in the demand for high-loading and ultra-high-loading electrodes in which the electrode slurry is loaded more heavily onto the current collector.

[0008] However, in the above-described traditional electrode manufacturing method, as the loading amount (thickness) of the electrode slurry increases, the electrode slurry discharged from the slot die coater becomes larger than the target electrode specifications due to its high fluidity during the coating process, and there is a problem of a sliding (collapse) phenomenon occurring in which the loading amount is smaller at the edge of the electrode slurry coating in the width direction than at the center of the electrode slurry coating. Furthermore, in the traditional electrode manufacturing method, as the loading amount (thickness) of the electrode slurry increases, the occurrence of cracks caused by the difference in drying speed near the boundary between the electrode slurry coating area and the uncoated area where the electrode slurry is not coated may become more severe during the drying process of the electrode slurry.

[0009] Therefore, in manufacturing high-loading or ultra-high-loading electrodes, it is necessary to develop new technologies to solve the problems associated with the above-mentioned traditional electrode manufacturing methods. Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention aims to provide a novel electrode manufacturing apparatus and method for manufacturing high-loading or ultra-high-loading electrodes, which solves the problems associated with conventional traditional electrode manufacturing methods despite the increased loading amount. [Means for solving the problem]

[0011] According to one embodiment of the present invention, there is provided an electrode manufacturing apparatus, comprising: a box-shaped cast having an internal space for accommodating an electrode slurry and a current collector, an electrode slurry inlet for injecting the electrode slurry into the internal space, and a current collector inlet for injecting the current collector into the internal space, and a heat source configured to heat the cast to dry the electrode slurry filled inside the cast, wherein the current collector inlet is located at the center of a first surface of the cast on which the current collector inlet is formed to deposit the electrode slurry on both sides of the current collector, and the cast may be configured to press the electrode slurry toward the current collector to roll the electrode slurry deposited on both sides of the current collector.

[0012] In one embodiment, the cast may further include a first vent hole for discharging gas generated by evaporation of a solvent of the electrode slurry layered on one side of the current collector to the outside of the cast, and a second vent hole for discharging gas generated by evaporation of a solvent of the electrode slurry layered on the other side of the current collector to the outside of the cast.

[0013] In one embodiment, the cast may be configured such that the horizontal length, vertical length, and thickness length of the internal space can be adjusted independently.

[0014] In one embodiment, the cast can be configured to be able to fix the current collector.

[0015] In one embodiment, the cast can be configured to fix the current collector in an upright position.

[0016] In one embodiment, the inner space of the cast may be divided into a first inner space and a second inner space by inserting a current collector.

[0017] The electrode manufacturing apparatus according to one embodiment may further include a driving unit for moving the first and second pressing surfaces of the cast in a pressing direction to press the electrode slurry laminated on both sides of the current collector.

[0018] In one embodiment, the heat source can be built into the cast.

[0019] In one embodiment, the heat source may be built into the first and second pressing surfaces of the cast for rolling the electrode slurry laminated on both sides of the current collector.

[0020] In one embodiment, the electrode slurry inlet may include a first electrode slurry inlet for injecting an electrode slurry to be laminated on one side of the current collector, and a second electrode slurry inlet for injecting an electrode slurry to be laminated on the other side of the current collector.

[0021] According to another embodiment of the present invention, there is provided an electrode manufacturing method, which may involve manufacturing an electrode using the electrode manufacturing apparatus described above.

[0022] In one embodiment, the electrode manufacturing method may include a step of introducing a current collector into the current collector inlet, a step of injecting electrode slurry through the electrode slurry inlet so that the electrode slurry is layered on both surfaces of the current collector, a temperature-raising step of raising the temperature of the heat source to dry the electrode slurry, and a step of rolling the electrode slurry simultaneously with the start of the temperature-raising step or during the temperature-raising step.

[0023] The method for manufacturing an electrode according to an embodiment may further include, before the current collector introducing step, adjusting the volume of the inner space of the cast so that the volume of the inner space is suitable for the specifications of the electrode to be manufactured.

[0024] In one embodiment, in the step of injecting the electrode slurry, the loading amount of the electrode slurry to be laminated on one surface of the current collector is 600 mg / 25 cm. 2The electrode slurry can be injected in the amount above.

[0025] In one embodiment, the step of increasing the temperature of the heat source may be initiated in a state where the internal space is completely filled with the electrode slurry. [Effects of the Invention]

[0026] According to one embodiment of the present invention, an electrode slurry is injected into a cast having a standardized sealed internal space, and the electrode slurry can be dried and compressed in a state where the internal space is completely filled with the electrode slurry. This eliminates the possibility of sliding due to the fluidity of the electrode slurry, and allows electrodes of desired specifications to be manufactured.

[0027] According to one embodiment of the present invention, the electrode slurry can be compressed simultaneously with drying of the electrode slurry, and even if the loading amount of the electrode slurry is increased, cracks that may be caused by differential drying do not occur, making it possible to manufacture an ultra-high loading electrode.

[0028] According to one embodiment of the present invention, by drying the electrode slurry and simultaneously compressing the electrode slurry, the boiling point of the solvent in the electrode slurry can be lowered, and the drying temperature can be set lower than in conventional electrode manufacturing equipment, which has the effect of preventing changes in the physical properties of the electrode due to high drying temperatures. [Brief explanation of the drawings]

[0029] [Figure 1] FIG. 1 is a front view of an electrode manufacturing apparatus according to an exemplary embodiment. [Figure 2] 1 is an internal view of an electrode manufacturing apparatus according to an exemplary embodiment; [Figure 3] FIG. 1 is a top view of an electrode manufacturing apparatus according to an exemplary embodiment. [Figure 4] 10 is a diagram showing the state after the electrode slurry is injected into the internal space of the cast. [Figure 5]1 is a flowchart illustrating a method for manufacturing an electrode according to an exemplary embodiment of the present invention. [Figure 6] 1 is a flowchart illustrating a method for manufacturing an electrode according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0030] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Before that, the terms and words used in the specification and claims are not to be interpreted as being limited to their ordinary or dictionary meanings, but are to be interpreted as meanings and concepts that are consistent with the technical idea of ​​the present invention, based on the principle that the inventor can appropriately define the concept of the term to best describe his / her own invention.

[0031] Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and there may be various equivalents and modifications that can replace them at the time of this application.

[0032] Furthermore, in the description of the present invention, if it is determined that a specific description of related publicly known configurations or functions may obscure the gist of the present invention, the detailed description will be omitted.

[0033] The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and therefore the shapes and sizes of components in the drawings may be exaggerated, omitted, or shown in a schematic manner for clearer explanation. Therefore, the sizes and proportions of each component do not completely reflect the actual sizes and proportions.

[0034] In this specification, the term "layering the electrode slurry" refers to a concept that includes filling the remaining space in the internal space of the cast (mold) excluding the current collector with the electrode slurry in order to form an electrode slurry layer on the current collector.

[0035] (First embodiment) The present invention provides an electrode manufacturing apparatus as a first embodiment.

[0036] FIG. 1 is a front view of an electrode manufacturing apparatus according to an exemplary embodiment, FIG. 2 is an internal view of an electrode manufacturing apparatus according to an exemplary embodiment, FIG. 3 is a top view of an electrode manufacturing apparatus according to an exemplary embodiment, and FIG. 4 is a diagram showing the state after electrode slurry has been injected into the internal space of the cast.

[0037] Referring to these drawings, an electrode manufacturing apparatus 100 according to an exemplary embodiment can include a box-shaped cast 110 having internal spaces 111a and 111b, and a heat source 120. The electrode manufacturing apparatus 100 according to one embodiment can be configured to continuously press the electrode slurry 12 in the direction of the current collector 11 while it is drying, with the current collector 11 and the electrode slurry 12 being placed in the internal spaces 111a and 111b of the cast.

[0038] The electrode manufacturing apparatus 100 according to an embodiment of the present invention is configured so that drying and rolling processes can be performed simultaneously while the internal spaces 111a, 111b, each having a predetermined volume, are sufficiently filled with electrode slurry 12. Manufacturing electrodes using this electrode manufacturing apparatus 100 eliminates the risk of sliding due to the fluidity of the electrode slurry, allowing for the manufacture of electrodes that meet the desired electrode specifications. Furthermore, since the electrode slurry is applied with a uniform thickness and the drying and rolling processes can be performed simultaneously, there is no risk of cracking, allowing for the manufacture of electrodes with a significantly increased electrode slurry loading. Furthermore, continuous pressure on the electrode slurry during drying lowers the boiling point of the solvent, allowing for the electrodes to be dried at a lower drying temperature compared to conventional electrode drying methods, thereby preventing changes in the physical properties of the electrodes due to high drying temperatures.

[0039] In one embodiment, the cast may have internal spaces 111a, 111b for accommodating electrode slurry 12 and current collector 11, electrode slurry inlets 112a, 112b for injecting electrode slurry 12 into the internal spaces 111a, 111b, and current collector inlets 113 for introducing the current collector 11 into the internal spaces 111a, 111b.

[0040] The cast 110 can be configured to be sealable in order to dry and press the electrode slurry filled inside, and the material of the cast is not particularly limited, but it is preferably a metallic material with excellent thermal conductivity for drying the electrode slurry.

[0041] The internal spaces 111a and 111b may have a rectangular parallelepiped (cuboid) shape corresponding to the shape of the electrode, and the cast 110 may be configured so that the horizontal length (X direction), vertical length (Y direction), and thickness length (Z direction) of the internal spaces 111a and 111b can be independently adjusted, thereby allowing the volumes of the internal spaces 111a and 111b to be adjusted according to the target specifications of the electrode to be manufactured.

[0042] As shown in FIG. 3, the collector inlet 113 can be located at the center of the first surface 115 of the cast on which the collector inlet is formed, thereby allowing the electrode slurry 12 to be layered on both surfaces of the collector 11.

[0043] When the current collector 11 is introduced into the internal spaces 111a and 111b of the cast through the current collector inlet 113, the internal spaces 111a and 111b can be divided into a first internal space 111a and a second internal space 111b by the current collector 11. The electrode slurry 12 introduced into the first internal space 111a can be turned into a first electrode active material layer 12a through a drying and rolling process, and the electrode slurry 12 introduced into the second internal space 111b can be turned into a second electrode active material layer 12b through a drying and rolling process.

[0044] The electrode slurry injection ports 112a and 112b may be two or more in number corresponding to the first internal space 111a and the second internal space 111b. That is, the electrode slurry injection ports may include a first electrode slurry injection port 112a for injecting an electrode slurry to be layered on one surface 11a of the current collector, and a second electrode slurry injection port 112b for injecting an electrode slurry to be layered on the other surface 11b of the current collector.

[0045] When the electrode slurry 12 is injected into the internal spaces 111a and 111b, the cast 110 may be configured to fix the current collector 11 so that the current collector 11 does not move due to the flow of the electrode slurry. The cast 110 may include a current collector fixing member (not shown) to fix the current collector introduced into the internal spaces.

[0046] The configuration of the current collector fixing member is not particularly limited as long as it can prevent the electrode current collector from shaking during the processes of injecting electrode slurry 12, drying, and rolling, and specifically may be a gripper configured to grip both sides of the current collector. Such grippers may include a first gripper attached around the current collector inlet 113 and a second gripper attached on the opposite side of the first surface 115 where the current collector inlet 113 is formed, and the first gripper grips one side of the current collector, and the second gripper grips the other side of the current collector, thereby fixing the current collector.

[0047] The cast 110 may be configured to fix the current collector in a horizontal state, or may be configured to fix the current collector 11 in an upright state as shown in Figures 2 and 4. Here, the horizontal state means that the plane of the current collector 11 is parallel to the bottom surface of the cast, and the upright state means that the plane of the current collector 11 is perpendicular to the bottom surface of the cast 110.

[0048] When the cast 110 is configured to be able to fix the current collector 11 in an upright position, the direction of gravity (Y direction) of the electrode slurry when the electrode slurry is poured is parallel to the plane of the current collector, so the gravity of the electrode slurry does not act on the plane of the current collector. In other words, when the cast 110 is configured to fix the current collector in an upright position, even if electrode slurry is poured onto both sides of the current collector at the same time, the current collector is not damaged by the weight of the electrode slurry, which improves the productivity of electrode production.

[0049] On the other hand, if the cast 110 is configured to fix the current collector 11 in a horizontal position, the direction of gravity of the electrode slurry 12 is perpendicular to the plane of the current collector, and the weight of the electrode slurry 12 applies a force to the current collector. In order to prevent damage to the current collector 11 due to the weight of the electrode slurry, a method of sequentially injecting the electrode slurry into the first internal space and the second internal space when injecting the electrode slurry into the internal space of the cast is considered, but this has the disadvantage of lower productivity compared to a configuration in which the current collector is fixed in an upright position.

[0050] The heat source 120 may be configured to heat the cast 110 in order to dry the electrode slurry 12 filled inside the cast. Referring to Figures 2 and 4, the heat source 120 may be built into the cast 110.

[0051] Meanwhile, the cast 110 may have a hexahedral shape with six walls tightly coupled to dry and press the electrode slurry filled therein, and the heat source may be built into the first pressing surface 116 and the second pressing surface 117 for pressing the electrode slurry. When the heat source is built into the first pressing surface 116 and the second pressing surface 117, it is preferable because drying efficiency can be improved when drying and rolling are performed simultaneously. However, the present invention is not limited thereto, and the heat source 120 may be built into the remaining four surfaces in addition to the first pressing surface 116 and the second pressing surface 117.

[0052] The heat source 120 is not limited in form or means as long as it can heat the cast 110 surrounding the heat source, and a specific example of the heat source 120 is an induction heating coil.

[0053] The temperature of the heat source 120 may be controlled by the temperature control unit 140. Specifically, after the inner space of the cast 110 is completely filled with the electrode slurry, the temperature control unit 140 may control the heat source 120 to increase in temperature in order to dry the electrode slurry. As the temperature of the heat source increases, the cast is heated, and the temperature of the electrode slurry increases. Then, after the drying of the electrode slurry is completed, the temperature control unit 140 may control the temperature of the heat source to decrease so that the cast is at room temperature.

[0054] The electrode slurry is heated by increasing the temperature of the heat source 120, and the solvent in the electrode slurry is evaporated and removed, resulting in drying. At this time, the cast 110 may be provided with vent holes 114a and 114b to discharge the evaporated solvent to the outside of the cast.

[0055] In one embodiment, the cast 110 may include a first vent hole 114a for discharging gas generated by evaporation of a solvent of the electrode slurry deposited on one surface 11a of the current collector to the outside of the cast, and a second vent hole 114b for discharging gas generated by evaporation of a solvent of the electrode slurry deposited on the other surface 11b of the current collector to the outside of the cast.

[0056] The positions of the first vent hole 114a and the second vent hole 114b are not particularly limited, but in order to improve the gas discharge efficiency, it is preferable that they be located on the first pressure surface 116 and the second pressure surface 117, which are used to pressurize the electrode slurry, among the six surfaces that make up the cast.

[0057] The cast 110 is configured to press the electrode slurry 12 toward the current collector 11 in order to roll out the electrode slurry layered on both sides of the current collector 11. Referring to FIG. 4, two surfaces constituting the cast 110 may be configured to move toward the current collector in order to press the electrode slurry filled in the internal space toward the current collector (in the direction of the arrow). The two surfaces face each other, and in this specification, the two surfaces for pressing the electrode slurry filled in the internal space of the cast are referred to as a first pressing surface 116 and a second pressing surface 117, respectively.

[0058] The electrode manufacturing apparatus 100 according to the present invention may further include a driving unit 130 for moving the first and second pressing surfaces 116 and 117 of the cast in a crimping direction. The driving unit 130 may include a motor that provides a driving force for continuously moving the first and second pressing surfaces 116 and 117 during drying of the electrode slurry. The driving unit may move the first and second pressing surfaces 116 and 117 in the crimping direction, but may maintain the first and second pressing surfaces 116 and 117 in that state after moving them a set distance. After the electrode manufacturing process is completed, the driving unit 130 may provide a driving force for returning the first and second pressing surfaces 116 and 117 to their original positions.

[0059] The electrode manufacturing apparatus 100 according to one embodiment may include a main control unit 150, which may be configured to control the volume of the internal space of the cast 110, the temperature adjustment unit 140, and the drive unit 130.

[0060] Unlike conventional electrode manufacturing equipment, the electrode manufacturing apparatus described above injects electrode slurry into a cast having a specified, sealed internal space, eliminating the possibility of sliding due to the fluidity of the electrode slurry, thereby enabling the manufacturing of electrodes of desired specifications. Furthermore, the electrode slurry can be compressed simultaneously with drying, preventing the occurrence of cracks unlike conventional electrode manufacturing equipment. Furthermore, the boiling point of the electrode slurry solvent can be lowered, allowing the drying temperature to be set lower than in conventional electrode manufacturing equipment.

[0061] (Second embodiment) The present invention provides a method for manufacturing an electrode as a second embodiment.

[0062] An electrode manufacturing method according to an exemplary embodiment of the present invention is characterized by using the electrode manufacturing apparatus described above, thereby achieving the effects of the electrode manufacturing apparatus described above.

[0063] 5 is a flowchart illustrating a method for manufacturing an electrode according to an exemplary embodiment of the present invention. Referring to FIG. 5, the method for manufacturing an electrode according to an exemplary embodiment of the present invention may include a step P110 of introducing a current collector into the current collector inlet, a step P120 of injecting electrode slurry through the electrode slurry inlet so that the electrode slurry is layered on both sides of the current collector, a temperature-raising step P130 of raising the temperature of the heat source to dry the electrode slurry, and a step P140 of rolling the electrode slurry simultaneously with the start of the temperature-raising step or during the temperature-raising step.

[0064] In the step of adding the current collector, the current collector may be a positive electrode current collector or a negative electrode current collector.

[0065] The electrode slurry may be a positive electrode slurry or a negative electrode slurry, and may be prepared by mixing and stirring an electrode active material, a binder, a conductive material, and a solvent.

[0066] According to one embodiment of the present invention, in the step P120 of injecting the electrode slurry to prepare an ultra-high loading electrode, the loading amount of the electrode slurry to be layered on one surface of the current collector is 600 mg / 25 cm. 2 The electrode slurry may be injected in an amount equal to or greater than the above amount.

[0067] As described above, in the electrode manufacturing method according to the present invention, the drying and pressing processes are carried out simultaneously with the inner space of the cast 110 completely filled with electrode slurry, so that the thickness of the electrode slurry coating is uniform even if the loading amount of the electrode slurry is increased to a very high level. As a result, there is no difference in drying or rolling density depending on the horizontal position of the electrode, and it is possible to manufacture an ultra-high loading electrode. Here, the loading amount of the electrode slurry for the ultra-high loading electrode is 600 mg / 25 cm based on the loading amount of the electrode slurry layered on one side of the current collector. 2 For more details, see 700mg / 25cm 2 For more details, see 750mg / 25cm 2 ~1500mg / 25cm 2 , more specifically 800mg / 25cm 2 ~1200mg / 25cm 2 It could be.

[0068] 6 is a flowchart illustrating a method for manufacturing an electrode according to an exemplary embodiment of the present invention. Referring to FIG. 6, the method for manufacturing an electrode according to an exemplary embodiment may further include a step P150 of adjusting the volume of the inner space of the cast before the current collector introduction step so that the volume of the inner space is suitable for the specifications of the electrode to be manufactured.

[0069] The process of adjusting the volume of the internal space P150 may include a process of adjusting the horizontal length, vertical length, and thickness length of the internal space of the cast so that they correspond to the horizontal length, vertical length, and thickness length of the electrode to be manufactured, respectively.

[0070] The step P130 of increasing the temperature of the heat source is started when the internal space is completely filled with the electrode slurry, because if the temperature of the heat source is increased when the internal space is not completely filled with the electrode slurry, an electrode cannot be manufactured to the desired specifications.

[0071] The present invention has been described in more detail above through the drawings and embodiments, etc. However, the configurations shown in the drawings or embodiments in this specification are merely one embodiment of the present invention and do not represent all of the technical ideas of the present invention, and therefore, at the time of filing this application, there may be various equivalents and modifications that can replace them. [Explanation of symbols]

[0072] 100: Electrode manufacturing equipment 110:Cast 111a: 1st internal space 111b:Second internal space 112a, 112b: Electrode slurry inlet 113: Current collector inlet 114a: First vent hole 114b: Second vent hole 115: 1st page 116: First pressure surface 117: Second pressure surface 120: Heat source 130: Drive unit 140: Temperature control section 150: Main control unit 11: Current collector 12: Electrode slurry

Claims

1. a box-shaped cast including an internal space for accommodating an electrode slurry and a current collector, an electrode slurry inlet for injecting the electrode slurry into the internal space, and a current collector inlet for introducing the current collector into the internal space; a heat source configured to heat the cast to dry the electrode slurry filled inside the cast, The current collector inlet is located at the center of a first surface of the cast in which the current collector inlet is formed, so that the electrode slurry can be deposited on both surfaces of the current collector. The electrode manufacturing apparatus is configured so that the caster presses the electrode slurry toward the current collector to roll the electrode slurry laminated on both sides of the current collector.

2. The cast is a first vent hole for discharging gas generated by evaporation of a solvent of the electrode slurry laminated on one surface of the current collector to the outside of the cast; 2. The electrode manufacturing apparatus according to claim 1, further comprising: a second vent hole for discharging gas generated by evaporation of a solvent of the electrode slurry layered on the other surface of the current collector to the outside of the cast.

3. The electrode manufacturing apparatus according to claim 1 , wherein the cast is configured to independently adjust the horizontal length, vertical length, and thickness length of the internal space.

4. The electrode manufacturing apparatus according to claim 1 , wherein the cast is configured to fix the current collector.

5. The electrode manufacturing apparatus according to claim 1 , wherein the cast is configured to fix the current collector in an upright state.

6. The electrode manufacturing apparatus according to claim 1 , wherein the internal space of the cast is divided into a first internal space and a second internal space by inserting a current collector.

7. 2. The electrode manufacturing apparatus according to claim 1, further comprising a driving unit for moving the first and second pressing surfaces of the cast in a pressing direction for pressing the electrode slurry laminated on both sides of the current collector.

8. The electrode manufacturing apparatus according to claim 1 , wherein the heat source is built into the cast.

9. 2. The electrode manufacturing apparatus according to claim 1, wherein the heat sources are built into the first and second pressing surfaces of the cast for rolling the electrode slurry laminated on both sides of the current collector.

10. 2. The electrode manufacturing apparatus according to claim 1, wherein the electrode slurry inlet includes a first electrode slurry inlet for injecting an electrode slurry to be layered on one surface of the current collector, and a second electrode slurry inlet for injecting an electrode slurry to be layered on the other surface of the current collector.

11. An electrode manufacturing method for manufacturing an electrode using the electrode manufacturing apparatus according to any one of claims 1 to 10.

12. an input step of inputting a current collector into the current collector input port; an injection step of injecting electrode slurry through the electrode slurry injection port so that the electrode slurry is layered on both surfaces of the current collector; a temperature increasing step of increasing the temperature of the heat source to dry the electrode slurry; The electrode manufacturing method according to claim 11 , further comprising a rolling step of rolling the electrode slurry simultaneously with the start of the temperature increasing step or during the temperature increasing step.

13. Before the adding step, The electrode manufacturing method according to claim 12, further comprising the step of adjusting the volume of the internal space of the cast so that the volume of the internal space is suitable for the specifications of the electrode to be manufactured.

14. In the injection step, the loading amount of the electrode slurry to be laminated on one surface of the current collector is 600 mg / 25 cm ２ The electrode manufacturing method according to claim 12 , wherein the electrode slurry is injected in an amount equal to or greater than the amount specified above.

15. The electrode manufacturing method according to claim 12 , wherein the temperature increasing step is started in a state where the internal space is completely filled with the electrode slurry.

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