Method for manufacturing electrode plate, secondary battery cell, and press press oil applier

Abstract

The invention provides a method of manufacturing an electrode plate, a secondary battery cell, and a stamper oil applicator. A method of manufacturing an electrode plate for a secondary battery includes: supplying an electrode plate including an active material layer and an uncoated portion to a press block on which a pad is formed; applying the punching oil absorbed by the pad to a partial region of the uncoated portion; and slotting the electrode plate along the partial region to which the stamping oil is applied.

Description

Technical Field

[0001] Aspects of the embodiments of the present disclosure relate to a stamp punching oil applicator and a method of manufacturing an electrode plate for a secondary battery. Background Art

[0002] Unlike primary batteries that are not designed to be (re)charged, secondary (or rechargeable) batteries are designed to discharge and recharge. In recent years, the rapid popularity of electronic devices using batteries, such as mobile phones, laptop computers, and electric vehicles, has led to a significant increase in the demand for secondary batteries. In particular, in response to rising raw material prices, research and development on improving the production capacity of lithium secondary batteries have been actively carried out.

[0003] On the other hand, the manufacturing process of electrode plates (e.g., positive electrode plates or negative electrode plates) in secondary batteries is an important step in the manufacturing process of secondary batteries. The manufacturing process of electrode plates may include applying a specific type of active material to the surface of a substrate serving as a current collector to improve its surface properties and enhance electrochemical reactions. Generally, to manufacture an electrode plate, an active material slurry may be applied to the substrate of the electrode plate, and then the uncoated portion where the active material is not applied may be molded into the shape of a lead tab through a slitting process using a die or a laser.

[0004] The above information disclosed in this background art section is for enhancing the understanding of the background of the present disclosure. Therefore, it may include information that does not constitute relevant (or prior) art. Summary of the Invention

[0005] A method of manufacturing an electrode plate for a secondary battery according to one or more embodiments of the present disclosure includes: supplying an electrode plate including an active material layer and an uncoated portion to a stamp block having a pad formed thereon; applying punching oil absorbed by the pad to a partial area of the uncoated portion; and slitting the electrode plate along the partial area to which the punching oil is applied.

[0006] According to one or more embodiments of the present disclosure, the area to which the punching oil is applied may include a cutting section, a non-electrode section, and an electrode section, and the punching oil may be applied to a partial area of the uncoated portion in the non-electrode section and a partial area of the uncoated portion in the electrode section.

[0007] According to one or more embodiments of the present disclosure, the punching oil may be applied only to a part of the boundary area between the active material layer and the uncoated portion in the electrode section.

[0008] According to one or more embodiments of the present disclosure, in the electrode section, the application pattern of the stamping oil may include a corner shape.

[0009] According to one or more embodiments of the present disclosure, the width of the application pattern of the stamping oil may be 3 mm or less.

[0010] According to one or more embodiments of the present disclosure, the supply electrode plate may include adjusting the moving speed of the electrode plate based on the length of the application pattern of the stamping oil, and applying the stamping oil includes repeatedly applying the stamping oil so that the application pattern of the stamping oil is repeatedly and continuously formed.

[0011] According to one or more embodiments of the present disclosure, the secondary battery cell may include an electrode plate for a secondary battery manufactured by the above method.

[0012] According to one or more embodiments of the present disclosure, a die stamping oil applicator for applying stamping oil to an electrode plate including an active material layer and an uncoated portion includes a pump for supplying stamping oil, a pad made of a porous material and connected to the pump to absorb the stamping oil, and a die module for supporting the pad, wherein the die module moves up and down in a direction perpendicular to the surface of the electrode plate on which the active material layer and the uncoated portion are formed; and applying the stamping oil absorbed in the pad to a partial area of the electrode plate.

[0013] According to one or more embodiments of the present disclosure, the stamping oil may be supplied to the pad in a fixed amount by the pump according to a predetermined number of applications.

[0014] According to one or more embodiments of the present disclosure, the porous material may include polyurethane.

[0015] According to one or more embodiments of the present disclosure, the die module may adjust the intensity of the pressure applied to the electrode plate through a stopper.

[0016] According to one or more embodiments of the present disclosure, the pad may protrude from the surface of the die module, the width of the pad may be 3 mm or less, and the protruding thickness of the pad may be 1 mm or less.

[0017] According to one or more embodiments of the present disclosure, the area of the electrode plate to which the stamping oil is applied may include a cutting section, a non-electrode section, and an electrode section, the pad includes portions corresponding to the cutting section, the non-electrode section, and the electrode section of the electrode plate respectively, and the die module may be configured to apply the stamping oil to a partial area of the uncoated portion in the non-electrode section and a partial area of the uncoated portion in the electrode section via the pad.

[0018] According to one or more embodiments of the present disclosure, the pressing module may be configured to apply stamping oil only to a part of the boundary region between the active material layer and the uncoated portion in the electrode section.

[0019] According to one or more embodiments of the present disclosure, the pad may be shaped to include a corner shape.

[0020] However, aspects and features of the present disclosure are not limited to those described above, and other aspects and features not mentioned will be clearly understood by those skilled in the art from the detailed description described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following drawings attached to this specification illustrate embodiments of the present disclosure and further describe aspects and features of the present disclosure together with the detailed description of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the drawings:

[0022] Figure 1 is a flowchart of an example of a method for manufacturing an electrode plate for a secondary battery according to an embodiment of the present disclosure.

[0023] Figure 2 is a schematic diagram of a manufacturing process of an electrode plate for a secondary battery according to an embodiment of the present disclosure.

[0024] Figure 3 is a schematic diagram of an edge position controller (EPC), a die stamping oil applicator, and a slitting device according to an embodiment of the present disclosure.

[0025] Figure 4 is a schematic diagram showing the application of stamping oil to an electrode plate of a secondary battery by a die stamping oil applicator according to an embodiment of the present disclosure.

[0026] Figure 5 is a schematic diagram of slitting an electrode plate for a secondary battery by a slitting device according to an embodiment of the present disclosure.

[0027] Figures 6 to 9 is a schematic diagram of stamping oil application patterns according to various embodiments of the present disclosure.

[0028] Figure 10 is a schematic diagram of an example of a die stamping oil applicator according to an embodiment of the present disclosure.

[0029] Figure 11 is along Figure 10 a cross-sectional view of the die stamping oil applicator taken along line A-A'. DETAILED DESCRIPTION

[0030] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Terms or words used in this specification and claims should not be construed as limited to the ordinary or dictionary meanings, and should be construed as meanings and concepts consistent with the technical concept of the present disclosure (based on the concept that the inventor can be his / her own lexicographer to appropriately define terms so as to best explain the principle of his / her invention).

[0031] The embodiments described in this specification and the configurations shown in the drawings are only some of the embodiments of the present disclosure and do not represent all the technical ideas, aspects, and features of the present disclosure. Therefore, it should be understood that there may be various equivalents and modifications that can replace or modify the embodiments described herein at the time of filing this application.

[0032] It will be understood that when an element or layer is referred to as being "on", "connected to", or "coupled to" another element or layer, it can be directly on, directly connected to, or directly coupled to the other element or layer, or there may also be one or more intervening elements or layers. When an element or layer is referred to as being "directly on", "directly connected to", or "directly coupled to" another element or layer, there are no intervening elements or layers. For example, when a first element is described as being "coupled" or "connected" to a second element, the first element can be directly coupled or connected to the second element, or the first element can be indirectly coupled or connected to the second element via one or more intervening elements.

[0033] In the drawings, for clarity of illustration, the dimensions of various elements, layers, etc. may be exaggerated. Like reference numerals refer to like elements. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Further, when describing embodiments of the present disclosure, the use of "may" refers to "one or more embodiments of the present disclosure". Expressions such as "at least one of..." and "any one of..." when following a list of elements modify the entire list of elements and not individual elements in the list. When phrases such as "at least one of A, B, and C", "at least one of A, B, or C", "at least one selected from the group consisting of A, B, and C", or "at least one selected from among A, B, and C" are used to refer to a list of elements A, B, and C, the phrase can refer to any and all suitable combinations or subsets of A, B, and C, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the terms "use", "using", and "used" may be considered synonymous with the terms "utilize", "utilizing", and "utilized", respectively. As used herein, the terms "substantially", "about", and similar terms are used as approximate terms and not degree terms, and are intended to account for the inherent variations in measured or calculated values as would be recognized by a person of ordinary skill in the art.

[0034] It will be understood that although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or section from another element, component, region, layer, or section. Thus, a first element, component, region, layer, or section discussed below may be termed a second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0035] For ease of description, spatial relative terms such as "below", "beneath", "under", "above", "on", etc. may be used herein to describe the relationship of one element or feature to another or other elements or features as shown in the drawings. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, an element described as "below" or "beneath" other elements or features will then be oriented "above" or "on" the other elements or features. Thus, the term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the spatial relative descriptors used herein should be interpreted accordingly.

[0036] The terms used herein are for the purpose of describing embodiments of the present disclosure and are not intended to limit the present disclosure. As used herein, the singular forms "a" and "an" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that when used in this specification, the terms "includes", "including", "comprises" and / or "comprising" specify the presence of the stated features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0037] In addition, any numerical range disclosed and / or recited herein is intended to include all sub-ranges of the same numerical precision subsumed within the recited range. For example, the range "1.0 to 10.0" is intended to include all sub-ranges between (and including) the recited minimum value 1.0 and the recited maximum value 10.0, that is, having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 2.4 to 7.6. Any maximum numerical limitation recited herein is intended to include all lower numerical limitations subsumed therein, and any minimum numerical limitation recited in this specification is intended to include all higher numerical limitations subsumed therein. Accordingly, the applicant reserves the right to amend this specification (including the claims) to expressly recite any sub-ranges subsumed within the ranges expressly recited herein. All such ranges are intended to be inherently described in this specification such that amendments to expressly recite any such sub-ranges will comply with the requirements of patent law.

[0038] Referring to two compared elements, features, etc. as "the same" may mean that they are "substantially the same". Thus, the phrase "substantially the same" may include cases having a deviation considered to be low in the art (e.g., a deviation of 5% or less). In addition, when a certain parameter is said to be uniform in a given region, it may mean that it is uniform in terms of the average value.

[0039] Throughout the specification, unless otherwise stated, each element may be singular or plural.

[0040] Disposing any element "above (or below)" or "on (under)" another element may mean that the any element may be arranged to be in contact with the upper (or lower) surface of the element, and another element may also be interposed between the element and any element disposed on (or below) the element.

[0041] In addition, it will be understood that when a component is referred to as being "linked", "coupled", or "connected" to another component, the components can be "coupled", "linked", or "connected" directly to each other, or another component can be "interposed" between the components.

[0042] Throughout the specification, unless otherwise stated, when stating "A and / or B", it means A, B, or A and B. That is, "and / or" includes any or all combinations of the listed items. When stating "C to D", unless otherwise stated, it means C or greater and D or less.

[0043] In this specification, the term "lead tab" refers to a metal strip or connecting wire connected to the positive and negative terminals of a battery, which is used to connect the internal electrical / chemical reactions of the battery to an external circuit and transfer electrical energy.

[0044] In addition, in this specification, the term "stamping oil" refers to a substance used to reduce the contact friction between a die and metal when grooving a plate or a metal electrode plate during a molding process, thereby improving the precision and quality of the component.

[0045] In addition, in this specification, the term "syringe pump" refers to a device including a syringe chamber and a syringe plunger, which is designed to manipulate a fluid with precise volume and rate. For example, a syringe pump can refer to a screw pump, a piston pump, a speed pump, etc.

[0046] In addition, in this specification, the term "scrap" refers to the material removed during a grooving process or not part of the final product. For example, it can refer to the cut-off and discarded part of an electrode plate or a plate to produce a specific shape or form.

[0047] Hereinafter, embodiments of the present disclosure will be described. However, the embodiments included in the present disclosure are only examples, and the present disclosure is not limited thereto.

[0048] Figure 1 is a flowchart showing an example of a method for manufacturing an electrode plate for a secondary battery according to an embodiment of the present disclosure.

[0049] Refer to Figure 1, the method 100 for manufacturing an electrode plate for a secondary battery can be initiated by providing an electrode plate between pressing modules (S110), the electrode plate having an active material layer and an uncoated portion on a substrate. The electrode plate can be provided by using rollers, which can include an un-winder roller and a re-winder roller. The active material layer refers to the portion of the electrode plate where the positive electrode (cathode) active material or the negative electrode (anode) active material is coated on the substrate, and the uncoated portion refers to the remaining portion of the electrode plate where the positive electrode active material and the negative electrode active material are not coated on the substrate. In one embodiment, the method for coating the active material layer with the positive electrode active material or the negative electrode active material can be a slurry coating method, in which a conductive additive and a binder are mixed with the active material to form a slurry, and then the slurry is applied to the surface of the substrate of the electrode plate. The pressing modules can include a pair of pressing modules that face each other and are spaced apart from each other at the same time. The electrode plate can be provided between the pair of pressing modules.

[0050] The positive electrode active material can include a compound capable of intercalating and deintercalating lithium (lithiation intercalation compound). Specifically, at least one of composite oxides of lithium and a metal selected from cobalt, manganese, nickel, and combinations thereof can be used. The composite oxide can be a lithium transition metal composite oxide. Specific examples of the composite oxide can include lithium nickel-based oxides, lithium cobalt-based oxides, lithium manganese-based oxides, lithium iron phosphate-based compounds, cobalt-free nickel manganese-based oxides, or combinations thereof.

[0051] The negative electrode active material can include a material that can reversibly intercalate / deintercalate lithium ions, lithium metal, a lithium metal alloy, a material that can dope / de-dope lithium, or a transition metal oxide. The material that can reversibly intercalate / deintercalate lithium ions can include a carbon-based negative electrode active material, such as, for example, crystalline carbon, amorphous carbon, or combinations thereof. The crystalline carbon can be graphite, such as non-shaped, flaky, lamellar, spherical, or fibrous natural graphite or artificial graphite. The amorphous carbon can be soft carbon, hard carbon, mesophase pitch carbonized product, calcined coke, etc. Si-based negative electrode active material or Sn-based negative electrode active material can be used in combination with the carbon-based negative electrode active material.

[0052] Thereafter, by using the pressing modules each formed with a pad thereon, the stamping oil absorbed by the pad can be applied to a partial area of the uncoated portion of the electrode plate (S120). The pressing modules can approach the electrode plate by moving up and down (e.g., towards each other) and apply the absorbed stamping oil in the pad to the electrode plate (e.g., to the uncoated portion) in a stamping manner. Subsequently, the position and pattern of applying the stamping oil will be described with reference to Figure 5 Describe the position and pattern of applying the stamping oil.

[0053] Then, the electrode plate can be slotted along the area where the stamping oil is applied (S130). Here, slotted means die slotted, which may include a process of cutting a metal electrode plate using a press. According to an embodiment, compared with the prior art, a smaller amount of stamping oil can be applied to the lead tabs generated after die slotted, so that the stamping oil can dry faster. As a result, the folding defects of the lead tabs can be reduced, and the contamination of the process equipment caused by the active material and the stamping oil can be minimized. An additional process for collecting and separately processing the waste generated after slotted can be performed. According to an embodiment, compared with the prior art, a smaller amount of stamping oil can be applied to the waste generated after die slotted, so that the post-treatment of the waste can be smoothly carried out. For example, reducing the amount of stamping oil remaining in the waste reduces the blockage or narrowing of the pipe for discharging the waste due to the high adhesion of the stamping oil to the inner wall of the pipe, thereby improving the overall equipment utilization rate of the entire process.

[0054] Hereinafter, an apparatus and a system for implementing a manufacturing method according to an embodiment of the present disclosure will be described in more detail.

[0055] Figure 2 is a schematic diagram showing the entire manufacturing process of an electrode plate for a secondary battery according to an embodiment of the present disclosure.

[0056] Refer to Figure 2 , a system 200 for manufacturing an electrode plate for a secondary battery may include an unwinding roller 210, a floating roller 220, a guide 230, an edge position controller (EPC) 240, a die stamping oil applicator 250, a slitting device 260, and a rewinding roller 270.

[0057] Through the operation of the unwinding roller 210 that unwinds the wound electrode plate and the rewinding roller 270 that rewinds the electrode plate after the process is completed, the electrode plate can move in a consistent direction and speed. This allows for the continuous supply of the electrode plate, enabling the process to proceed continuously.

[0058] The floating roller 220 can be used to control the amount of tension applied to the electrode plate so that the electrode plate is supplied with a specific range of tension. For example, a change in the amount of tension applied to the electrode plate supplied through the guide 230 causes a vertical and / or horizontal movement of the floating roller 220, and such movement can be detected by a sensor or a controller to adjust the rotational speed and torque of the unwinding roller 210 and the rewinding roller 270.

[0059] The EPC 240 can be used to adjust the position of the electrode plate by detecting the edge line of the electrode plate during the movement of the electrode plate using an optical sensor, a laser sensor, etc., so as to accurately maintain the alignment of the electrode plate. The floating roller 220, the guide 230, and the EPC 240 can have various positions and arrangement orders depending on the manufacturing system, and each of them can be provided in multiple numbers.

[0060] The die stamping oil applicator 250 can be used to apply stamping oil to the provided electrode plate. The structure and operation of the die stamping oil applicator 250 according to an embodiment will be described later.

[0061] The grooving device 260 can groove along the stamping oil applied to the electrode plate. The grooving device 260 can include a die device for the grooving process. For example, the grooving device 260 can include a grooving press using a hydraulic cylinder or a pneumatic cylinder, etc., a die, a base for mounting the die, a system for controlling the position, depth, and pattern of the notch, and a safety device.

[0062] In addition, the system 200 for manufacturing an electrode plate for a secondary battery can further include a clamping type supply device and a suction device for transporting the electrode plate, a visual inspection device for inspecting the electrode plate, an NG indicating device, etc.

[0063] will be described with reference to Figure 3 in more detail the die stamping oil applicator 250 and the grooving device 260 included in the system 200 for manufacturing an electrode plate for a secondary battery and included in the Figure 2 dashed box shown.

[0064] Figure 3 is a schematic diagram of an EPC, a die stamping oil applicator, and a grooving device according to an embodiment of the present disclosure.

[0065] As Figure 3 shown, an active material layer 302 and an uncoated portion 304 can be formed (e.g., defined) on the substrate of the electrode plate 300 corresponding to the current collector. The active material layer 302 refers to a region of the substrate where the positive electrode active material or the negative electrode active material is applied to the substrate of the electrode plate 300, and the uncoated portion 304 refers to the remaining region on the substrate of the electrode plate 300 where neither the positive electrode active material nor the negative electrode active material is applied. During the movement of the electrode plate 300 in one direction, the electrode plate 300 can be maintained in alignment by the EPC 310. When the uncoated portion 304 of the electrode plate 300 is aligned and moves toward the die module 320, an application pattern 324 of stamping oil can be repeatedly and continuously formed on the electrode plate 300. Figure 3The EPC 310 shown is merely an example, and the position and arrangement of the rollers of the EPC 310 for adjusting the alignment of the electrode plate 300 can be changed and / or adjusted. In addition, the EPC 310 can also include a sensor for detecting the position of the edge of the electrode plate 300 and a controller for controlling the angle and rotational speed of the rollers of the EPC 310 based on the position detected by the sensor.

[0066] The die stamping oil applicator 250's die module 320 can consist of a pair of die modules 320 arranged opposite to each other and spaced apart from each other with the electrode plate 300 therebetween. One of the pair of die modules 320 disposed above the electrode plate 300 can move downward toward the electrode plate 300, and the other of the pair of die modules 320 disposed below the electrode plate 300 can move upward toward the electrode plate 300. The pair of die modules 320 can both move up and down, or only one of the pair of die modules 320 can move up or down while the other can be fixed.

[0067] The pads 322 can be formed on each of the surfaces of the pair of die modules 320 facing the electrode plate 300. For example, the pads 322 on the respective facing surfaces of the pair of die modules 320 can face each other (with the electrode plate 300 therebetween). The pads 322 can have a shape protruding from the corresponding die module 320. For example, the pads 322 can be on the inner surface of one of the pair of die modules 320 and can protrude from the inner surface of one of the pair of die modules 320 toward the other of the pair of die modules 320. For example, in the case of the upper die module of the pair of die modules 320 disposed above the electrode plate 300, the pad 322 can be formed to protrude downward from the bottom surface of the upper die module. In the case of the lower die module of the pair of die modules 320 disposed below the electrode plate 300, the pad 322 can be formed to protrude upward from the top surface of the lower die module. For example, if the pads 322 are formed on both of the pair of die modules 320, the shapes of the pads 322 can correspond to each other. In another example, the pads 322 can be formed on only one of the pair of die modules 320.

[0068] Each pad 322 can absorb stamping oil. The pads 322 can be made of a porous material, and a pump can be provided to supply stamping oil to the pads 322. For example, referring to Figure 3, the pads 322 can be formed on the portion of the pressing module 320 that overlaps with the uncoated portion 304 of the electrode plate 300 (e.g., only overlaps with the uncoated portion 304 of the electrode plate 300). By, for example, vertically moving a pair of pads 322 (e.g., by moving the pair of pads 322 towards each other) to approach the electrode plate 300, stamping oil (absorbed within the pads 322) can be applied to the corresponding opposite surfaces (e.g., the top surface and the bottom surface) of the electrode plate 300. The pair of pads 322 are arranged opposite to each other while being spaced apart from each other with the electrode plate 300 therebetween. The shape of the pads 322 can determine the application pattern 324 of the stamping oil on the top surface and the bottom surface of the electrode plate 300. In another example, the application pattern 324 of the stamping oil can be applied only to the top surface or the bottom surface of the electrode plate 300.

[0069] The electrode plate 300 coated with the application pattern 324 of the stamping oil can be transferred to the slitting device 330. The slitting device 330 can cut (e.g., slit) the electrode plate 300 (e.g., the uncoated portion 304) according to the application pattern 324 of the stamping oil. After the slitting process, the uncoated portion 304 can be separated into lead tabs 340 and scrap 350.

[0070] Figure 4 is a schematic diagram showing the operation of applying stamping oil to the electrode plate 300 for a secondary battery by a die stamping oil applicator according to an embodiment of the present disclosure.

[0071] In the first operation 410, the electrode plate 300 can be supplied to the pressing module 320 of the die stamping oil applicator. For example, the electrode plate 300 can be supplied to the space between a pair of pressing modules 320, which are arranged opposite to each other while being spaced apart from each other. The electrode plate 300 can have an active material layer 302 and an uncoated portion 304. The electrode plate 300 can be moved and positioned to allow the area of the electrode plate 300 that requires stamping oil application to be disposed above and below the pads 322 formed on the pressing module 320. For example, the electrode plate 300 can be provided such that the projection of the pads 322 formed on the pressing module 320 is aligned with the area where stamping oil needs to be applied. For example, the pads 322 can be arranged to face and overlap with the opposite surfaces of the uncoated portion 304 of the electrode plate 300. Additionally, stamping oil can be supplied to the pads 322 by a pump such that the pads 322 can be in a state of absorbing the stamping oil (e.g., the pads 322 can be soaked or impregnated with the stamping oil).

[0072] Next, in the second operation 420, the pressing modules 320 can move towards each other (e.g., the pressing modules 320 can move vertically along a direction perpendicular to the moving direction of the electrode plate 300 or along a direction perpendicular to the surface of the electrode plate 300). For example, the pressing modules 320 can move up and down until the pads 322 formed on the pressing modules 320 come into contact with the electrode plate 300. When in contact with the electrode plate 300, the stamping oil absorbed by the pads 322 is transferred to the electrode plate 300 (e.g., transferred to the uncoated portion 304 of the electrode plate 300), and an application pattern 324 of the stamping oil is formed on the uncoated portion 304 of the electrode plate 300. A part of the application pattern 324 of the stamping oil formed on the electrode plate 300 can be formed at the boundary region between the uncoated portion 304 and the active material layer 302. In addition, a part of the application pattern 324 of the stamping oil can be formed in the width direction of the uncoated portion 304. During the second operation 420, the electrode plate 300 can stop moving.

[0073] The pressing modules 320 can adjust the intensity of the pressure applied to the electrode plate 300 through a stopper. The stopper can be a device that controls the position and movement of the pressing modules 320 and prevents accidental movement. The stopper can control the movement of the pressing modules 320 by incorporating screws or steps in the pressing device that controls the vertical movement of the pressing modules 320. In another example, the stopper can be implemented in a way that is integrated with and programmed into the press control system.

[0074] In the third operation 430, the pressing modules 320 can return to their original positions (e.g., move away from each other and away from the electrode plate 300). At this time, the electrode plate 300 can retain the application pattern 324 of the stamping oil applied from the pads 322. During the return of the pressing modules 320 to their original positions, the electrode plate 300 can start moving again (e.g., after being stationary during the second operation 420).

[0075] By sequentially repeating the first operation 410 to the third operation 430, the process of applying the stamping oil to the electrode plate 300 can be continuously performed. In this process, supplying the electrode plate 300 in the first operation 410 can include adjusting the moving speed of the electrode plate 300 based on the length of the application pattern 324 of the stamping oil. For example, when the length of the application pattern 324 of the stamping oil is 10 cm and the time taken from the first operation 410 to the third operation 430 is 10 seconds, the electrode plate 300 can move 10 cm within 10 seconds.

[0076] Figure 4It is shown that the pads 322 are respectively formed on the upper pressing module 320 and the lower pressing module 320, but the present disclosure is not limited thereto, and only one of the upper pressing module 320 and the lower pressing module 320 may have a pad thereon. Accordingly, the application pattern 324 of the stamping oil may be applied to both the top surface and the bottom surface of the electrode plate 300, or the application pattern 324 of the stamping oil may be applied to only one of the top surface and the bottom surface of the electrode plate 300.

[0077] For example, as Figure 4 shown, the uncoated portion 304 may be formed only on one of the two edge portions of the electrode plate 300. In another example, the uncoated portion 304 may be formed on the two edge portions of the electrode plate 300, and if necessary, the stamping oil may be applied to the two edge portions of the electrode plate 300 in the same manner.

[0078] Figure 5 is a schematic view showing a slitting operation of an electrode plate for a secondary battery by a slitting device according to an embodiment of the present disclosure. Figure 5 shows Figure 4 an enlarged partial top view of the electrode plate 300 in

[0079] Referring to Figure 5 , the first region 510 (i.e., where the stamping oil application pattern 520 is formed on the electrode plate 300) may include a cutting section 512, a non-electrode section 514, and an electrode section 516. Figure 5 The stamping oil application pattern 520 in Figure 4 may be substantially the same as the application pattern 324 in

[0080] The stamping oil application pattern 520 refers to the minimum unit pattern repeatedly formed on the electrode plate 300. Each section of the stamping oil application pattern 520 may be divided from each other based on the width of the electrode plate 300, or each section may be divided from each other based on a direction perpendicular to the moving direction of the electrode plate 300 horizontally. The order and number of the cutting section 512, the non-electrode section 514, and the electrode section 516 may vary, and the partial application patterns formed in the respective sections may be connected to each other to form the stamping oil application pattern 520. The length of the stamping oil application pattern 520 may correspond to the length of the first region 510 (e.g., along the moving direction of the electrode plate 300 indicated by the arrow in Figure 5 ).

[0081] In the cutting section 512, the entire area of the uncoated portion 304 or the uncoated portion 304 except for the tab-shaped area may be coated with stamping oil. For example, as Figure 5As shown, in the cutting section 512, stamping oil can be applied to the entire uncoated portion 304 in a direction horizontally perpendicular to the moving direction of the electrode plate 300. In addition, stamping oil can also be applied to the boundary region between the uncoated portion 304 and the active material layer 302. The boundary region between the uncoated portion 304 and the active material layer 302 is the region where the uncoated portion 304 and the active material layer 302 are in contact, and the boundary region may together include a part of the uncoated portion 304 and a part of the active material layer 302, or may only include a part of the uncoated portion 304. For the cutting section 512, the grooving device can cut (e.g., groove) the electrode plate 300 in a direction horizontally perpendicular to the moving direction of the electrode plate 300. In another example, a partial area of the uncoated portion 304 may be free of stamping oil within an allowable tolerance range. In yet another example, in the cutting section 512, stamping oil can be applied to the uncoated portion 304 except for the tab-shaped area, which will be described in more detail below with reference to Figure 9 More specifically.

[0082] In the non-electrode section 514, a partial area of the uncoated portion 304 may be coated with stamping oil. For example, stamping oil can be applied along the moving direction of the electrode plate 300 in the non-electrode section 514. That is, in the non-electrode section 514, stamping oil can be applied (e.g., only applied) to the boundary region between the uncoated portion 304 and the active material layer 302, for example, along the moving direction of the electrode plate 300. Therefore, stamping oil is applied to a partial area of the uncoated portion 304. For example, as Figure 5 shown, a plurality of non-electrode sections 514 may be formed in the first region 510 and spaced apart from each other simultaneously (e.g., Figure 5 one non-electrode section 514 is separated from the electrode plate 300, while Figure 5 another non-electrode section 514 is attached to the electrode plate 300). In another example, a plurality of non-electrode sections 514 may be formed in the first region 510 and be continuous with each other simultaneously to form a single continuous section. For the non-electrode section 514, the grooving device can cut (e.g., groove) the electrode plate 300 in the moving direction of the electrode plate 300.

[0083] In the electrode section 516, a partial area of the uncoated portion 304 may be coated with stamping oil. For example, in the electrode section 516, stamping oil can be applied to a partial area of the uncoated portion 304 along the shape of the lead tab. In the electrode section 516, the boundary region between the uncoated portion 304 and the active material layer 302 may be partially coated with stamping oil. That is, some parts of the boundary region may be coated with stamping oil, and some parts of the boundary region may not be coated with stamping oil.

[0084] The electrode section 516 corresponds to the section remaining after the slitting process, which includes the lead tab 550. In one embodiment, the shape of the lead tab 550 may be a rectangle protruding from the boundary region between the uncoated portion 304 and the active material layer 302. Accordingly, the stamping oil application pattern 520 may include a corner shape 522. For example, as Figure 5 shown, the shape of the lead tab 550 may be a rectangle.

[0085] In one embodiment, the width of the stamping oil application pattern 520 may be 3 mm or less. Additionally, the length or ratio of each of the cutting section 512, non-electrode section 514, and electrode section 516 in the first region 510 may vary to the extent that a typical lead tab 550 can be formed using the method disclosed in the present disclosure.

[0086] In one embodiment, the stamping oil application pattern 520 may vary according to the addition of a new section or a change in the order of the cutting section 512, non-electrode section 514, and electrode section 516. Various embodiments of the stamping oil application pattern 520 will be described in detail with reference to Figures 6 to 9 the present disclosure.

[0087] In one embodiment, the stamping oil application pattern 520 may be repeatedly formed on the electrode plate 300 such that a plurality of patterns may be formed and interconnected. For example, as Figure 5 shown, a first application pattern may be formed in the first region 510, and a second application pattern having the same shape as the first application pattern may be formed in the second region 530 before the first application pattern. The second region 530 corresponds to (e.g., may be adjacent to and directly connected to) the first region 510, and the cutting section of the second region 530 may be continuously connected to the non-electrode section 514 of the first region 510.

[0088] Figure 5 Also shown is the result of the slitting process in the second region 530, where the electrode plate 300 is slit according to the stamping oil application pattern formed in the second region 530. The slitting device may cut the electrode plate 300 along the center line of the stamping oil application pattern such that the stamping oil may remain on a part of the electrode plate 300 even after cutting. After the slitting process, a lead tab 550 may be formed from the remaining uncoated portion connected to the active material layer 302 after cutting. Additionally, a scrap 540 may be generated after the slitting process.

[0089] Figures 6 to 9 is a schematic diagram showing stamping oil application patterns according to various embodiments of the present disclosure. A repeated description of the configurations corresponding to those disclosed in Figures 6 to 9 among those configurations will be omitted. Figure 5 relatively

[0090] As Figure 6 shown, in the modified embodiment 600, the first region 610 (i.e., where the stamping oil application pattern 620 can be formed) may include a cutting section 612, a non-electrode section 614, and an electrode section 616 arranged in sequence along the moving direction of the electrode plate. For example, the stamping oil application pattern 620 may be repeatedly formed and connected to each other on the electrode plate. In addition, a stamping oil application pattern having the same shape as the stamping oil application pattern 620 in the first region 610 may be formed in the second region 630 before the stamping oil application pattern 620. In the modified embodiment 600, the cutting section of the second region 630 may be seamlessly connected to the electrode section 616 of the first region 610 (e.g., may include fewer corner shapes than the structure in Figure 5 ).

[0091] Figure 6 Also shown is the result of the grooving process in the second region 630 (where the electrode plate is grooved according to the stamping oil application pattern formed in the second region 630). After the grooving process, a lead tab 650 and a scrap 640 may be formed. The lead tab 650 may be composed of the remaining uncoated portion connected to the active material layer after cutting.

[0092] As Figure 7 shown, in another modified embodiment 700, the first region 710 (i.e., where the stamping oil application pattern 720 can be formed) may include a cutting section 712, a first non-electrode section 714, an electrode section 716, and a second non-electrode section 718 arranged in sequence along the moving direction of the electrode plate. For example, the stamping oil application pattern 720 may be repeatedly formed and connected to each other on the electrode plate. In addition, a stamping oil application pattern having the same shape as the stamping oil application pattern 720 in the first region 710 may be formed in the second region 730 before the stamping oil application pattern 720. As Figure 7 shown, the cutting section of the second region 730 may be seamlessly connected to the second non-electrode section 718 of the first region 710.

[0093] Figure 7 Also shown is the result of the grooving process in the second region 730 (where the electrode plate is grooved according to the stamping oil application pattern formed in the second region 730). After the grooving process, a lead tab 750 and a scrap 740 may be formed. The lead tab 750 may be composed of the remaining uncoated portion connected to the active material layer after cutting.

[0094] As Figure 8As shown, in yet another modified embodiment 800, the first region 810 (i.e., where the stamping oil application pattern 820 can be formed) may include electrode segments 812, non-electrode segments 814, and cutting segments 816 arranged in sequence along the moving direction of the electrode plate. For example, the stamping oil application pattern 820 may be repeatedly formed and connected to each other on the electrode plate. In addition, a stamping oil application pattern having the same shape as the stamping oil application pattern 820 in the first region 810 may be formed in the second region 830 before the stamping oil application pattern 820. As Figure 8 shown, the electrode segment in the second region 830 may be seamlessly connected to the cutting segment 816 in the first region 810.

[0095] Figure 8 Also shown is the result of the slitting process in the second region 830 (where the electrode plate is slit according to the stamping oil application pattern formed in the second region 830). After the slitting process, a lead tab 850 and a scrap 840 may be formed. The lead tab 850 may be composed of the remaining uncoated portion that is connected to the active material layer after cutting.

[0096] As Figure 9 shown, in yet another embodiment 900, the first region 910 (i.e., where the stamping oil application pattern 920 can be formed) may include a cutting segment 912, a first electrode segment 914, a non-electrode segment 916, and a second electrode segment 918 arranged in sequence along the moving direction of the electrode plate. In the cutting segment 912, the entire region of the uncoated portion 304 except for the region reserved as the lead tab is coated with stamping oil. For example, in the cutting segment 912, the stamping oil may be applied to a partial region of the uncoated portion 304 in a direction horizontally perpendicular to the moving direction of the electrode plate.

[0097] Specifically, the stamping oil application pattern 920 may be repeatedly formed and connected to each other on the electrode plate. In addition, a stamping oil application pattern having the same shape as the stamping oil application pattern 920 in the first region 910 may be formed in the second region 930 before the stamping oil application pattern 920. As Figure 9 shown, the cutting segment in the second region 930 may be seamlessly connected to the second electrode segment 918 in the first region 910.

[0098] Figure 9The result of the grooving process in the second region 930 (wherein the electrode plate is grooved according to the stamping oil application pattern formed in the second region 930) is also shown. After the grooving process, a lead tab 950 composed of the remaining uncoated portion after cutting can be formed. The lead tab 950 is formed by combining the second electrode section of the second region 930 and the cut section and the first electrode section of the previous region and is connected to the active material layer. In addition, a waste 940 composed of the uncoated portion can be formed, and the waste 940 cannot form the lead tab 950.

[0099] Figure 10 FIG. is a schematic diagram showing an example of a die stamping oil applicator 1000 according to an embodiment of the present disclosure. In one embodiment, the die stamping oil applicator 1000 may include a pump 1010 for supplying stamping oil, a pad 1020 connected to the pump 1010 to absorb the stamping oil, and a die block 1030 for supporting the pad 1020. For example, as Figure 10 shown, the die stamping oil applicator 1000 may include only one die block 1030. In another example, the die stamping oil applicator 1000 may include a pair of die blocks 1030, for example, configured symmetrically with each other.

[0100] In one embodiment, each pump 1010 may be inserted into the interior of the die block 1030 such that one end of the pipe forming the pump 1010 can be connected to the pad 1020. For example, the pump 1010 may be a syringe pump. In another example, the pump 1010 may be formed in any suitable shape to ensure smooth supply of the stamping oil to the pad 1020.

[0101] In one embodiment, the pad 1020 may be formed to protrude from one surface of the die block 1030. The pad 1020 may be made of a porous material. For example, the porous material may include polyurethane. Polyurethane is a hydrophilic porous material that can be used in a 100 °C environment. Polyurethane can maintain high absorbency and water retention even in a dry state and can be treated to provide excellent chemical resistance to salts, alcohols, acids, and bases. In one embodiment, the treated porous material may have a pore diameter of 25 μm, an apparent density of 0.21 g / cm 3 and a porosity of 83%. For example, considering effective absorption and application of the stamping oil, the pad 1020 may be formed in various shapes.

[0102] In one embodiment, the shape of the pad 1020 may vary according to Figures 6 to 9 the stamping oil application pattern exemplarily shown in. For example, the shape of the pad 1020 may include a corner shape 1022. In addition, the width of the pad 1020 may be 3 mm or less, and the protruding thickness of the pad 1020 may be 1 mm or less.

[0103] In one embodiment, the pressing module 1030 may move up and down in a direction perpendicular to the surface of the electrode plate on which the active material layer and the uncoated portion are formed, so as to apply the stamping oil absorbed by the pad 1020 to a partial area of the uncoated portion. The pressing module 1030 may also adjust the intensity of the pressure applied to the electrode plate through a stopper. In addition, the pump 1010 and the stopper may optimize the amount of stamping oil consumed in the slitting process. As a result, the operating cost of the slitting process can be reduced.

[0104] Figure 11 is a cross-sectional view of the die stamping oil applicator 1000C taken along line A-A' of Figure 10 . In one embodiment, the stamping oil 1100 may be supplied to the pad 1020 in a fixed amount by the pump 1010 inserted into the interior of the pressing module 1030 before the stamping oil is applied. The stamping oil may be supplied to the pad 1020 in a fixed amount by the pump 1010 according to a predetermined number of applications. For example, when the amount of stamping oil applied each time is 5 ml and six applications are performed within one minute, the stamping oil 1100 may be continuously supplied at a rate of 0.5 ml / s by the pump 1010. In another example, the stamping oil 1100 may be supplied in a fixed amount of 5 ml at intervals of 10 seconds. For example, in order to facilitate the manufacturing process of the electrode plate for the secondary battery, various methods may be adopted to supply the stamping oil 1100.

[0105] If the electrode plate including the active material layer and the uncoated portion is coated via spraying directly applied to the uncoated portion (for example, instead of via the pressing module with a pad according to the embodiment), the entire uncoated portion will be coated with stamping oil, and then the sprayed uncoated portion will be molded into the shape of a lead tab through a slitting process. However, the waste generated during the slitting process will also be coated with a large amount of stamping oil (because the entire uncoated portion will be coated with stamping oil), resulting in high consumption of stamping oil, high cost of manufacturing the electrode plate, and easy blockage of the waste discharge pipe.

[0106] In contrast, the secondary battery cell according to the embodiment may include an electrode plate for the secondary battery manufactured by a manufacturing method that can use a smaller amount of stamping oil (for example, due to the use of a pad). The secondary battery cell may be used in automobiles, mobile phones, and / or various types of electrical devices.

[0107] The secondary battery cell may include an electrode assembly, a first current collector, a first terminal, a second current collector, a second terminal, a case, and a cover assembly. Among these, the electrode plate for the electrode assembly may be manufactured according to the manufacturing method of the embodiment of the present disclosure.

[0108] The electrode assembly can be formed by stacking a first electrode plate, a separator, and a second electrode plate that are formed into a thin plate or film by winding or stacking. When the electrode assembly is a wound-type stack, the winding axis can be parallel to the longitudinal direction of the housing. In other embodiments, the electrode assembly can be a stacked type rather than a wound type, and the shape of the electrode assembly is not limited in the present disclosure. In addition, the electrode assembly can be a Z-stacked electrode assembly, in which a positive electrode plate and a negative electrode plate are inserted on both sides of the separator and then bent into a Z-stack. In addition, one or more electrode assemblies can be stacked such that the long sides of the electrode assemblies are adjacent to each other and accommodated in the housing, and the number of electrode assemblies in the housing is not limited in the present disclosure. The first electrode plate of the electrode assembly can be used as the negative electrode, and the second electrode plate can be used as the positive electrode. Of course, the opposite is also possible.

[0109] The first electrode plate can be formed by applying a first electrode active material (such as graphite or carbon) to a first electrode current collector formed of a metal foil (such as copper, copper alloy, nickel, or nickel alloy). The first electrode plate can include a first electrode tab (e.g., a first uncoated portion), which is an area where the first electrode active material is not applied. The first electrode tab can be used as a current flow path between the first electrode plate and the first electrode current collector. The second electrode plate can be formed by applying a second electrode active material (such as a transition metal oxide) to a second electrode current collector formed of a metal foil (such as aluminum or aluminum alloy). The second electrode plate can include a second electrode tab (e.g., a second uncoated portion), which is an area where the second electrode active material is not applied. The second electrode tab can be used as a current flow path between the second electrode plate and the second electrode current collector. The first electrode tab of the first electrode plate and the second electrode tab of the second electrode plate can be located at both ends (e.g., opposite ends) of the electrode assembly, respectively. In some embodiments, the electrode assembly can be accommodated in the housing together with the electrolyte. In addition, in the electrode assembly, the first electrode current collector and the second electrode current collector can be respectively welded and connected to the first electrode tab of the first electrode plate and the second electrode tab of the second electrode plate exposed on both sides, and then located there respectively.

[0110] The separator prevents short circuit between the first electrode plate and the second electrode plate while allowing lithium ions to move therebetween. The separator can be made of, for example, a polyethylene film, a polypropylene film, a polyethylene-polypropylene film, etc.

[0111] The housing accommodates the electrode assembly and forms the appearance of the secondary battery cell together with the cover assembly. The housing can be configured in various shapes, such as a circular shape and a pouch shape. In addition, the housing can be made of metal (such as aluminum, aluminum alloy, or nickel-plated steel), a laminated film, or plastic (e.g., in the pouch-type embodiment).

[0112] The cover assembly can be fixed to the inside of the crimping portion through a washer to seal the housing. The cover assembly may include an upper cover, a safety vent hole, a lower cover, an insulating member, and a daughter board, but is not limited thereto, and may be modified in various ways.

[0113] Although the present disclosure has been described above with respect to embodiments of the present disclosure, the present disclosure is not limited thereto. Those skilled in the art can make various modifications and variations within the spirit of the present disclosure and the scope equivalent to the appended claims.

[0114] However, the technical problems to be solved by the present disclosure are not limited to the above problems, and other problems not mentioned herein and aspects and features of the present disclosure that will solve such problems will be clearly understood by those skilled in the art from the following description of the present disclosure.

[0115] By summarizing and reviewing, stamping oil can be sprayed onto the entire uncoated portion of the substrate of the electrode plate to prevent adhesion during die slotting. However, applying stamping oil to portions (areas) of the substrate of the electrode plate that the die cannot reach, the long drying time of the stamping oil, and the large amount of stamping oil applied to the waste generated after die slotting (which may clog the waste discharge pipe) may increase the operating cost. Instead, embodiments of the present disclosure provide a die stamping oil applicator and a method of manufacturing an electrode plate for a secondary battery using the die stamping oil applicator to reduce the manufacturing cost.

[0116] According to an embodiment of the present disclosure, by applying stamping oil along the shape of the lead tab, applying stamping oil to areas that are not required for die slotting can be avoided. In addition, the amount of stamping oil consumed in the slotting process can be optimized by a pump and a stopper. Therefore, the operating cost consumed in the slotting process can be reduced.

[0117] According to an embodiment of the present disclosure, compared with the related art, a smaller amount of stamping oil is applied to the waste generated after die slotting, so that the post-treatment of the waste can be smoothly carried out. Specifically, reducing the amount of stamping oil remaining in the waste reduces the clogging or narrowing of the pipe due to the high adhesion of the stamping oil to the inner wall of the pipe for discharging the waste, thereby improving the overall equipment utilization rate of the entire process.

[0118] According to an embodiment of the present disclosure, compared with the related art, a smaller amount of stamping oil is applied to the lead tab generated after die slotting, so that the stamping oil can dry faster. As a result, lead tab folding defects can be reduced, and the contamination of the active material and the stamping oil to the process equipment can be minimized.

[0119] According to an embodiment of the present disclosure, by adopting a die method for applying stamping oil, the amount of stamping oil applied can be reduced, and precise control can be performed to ensure that an appropriate amount of stamping oil is applied.

[0120] Example embodiments have been disclosed herein, and although specific terms are employed, they are used and interpreted in a general and descriptive sense only and not for purposes of limitation. In some instances, as will be apparent to those of ordinary skill in the art at the time of filing of this application, features, characteristics and / or elements described in connection with a particular embodiment may be used separately or in combination with features, characteristics and / or elements described in connection with other embodiments, unless otherwise specifically indicated. Accordingly, those skilled in the art will appreciate that various changes may be made in form and detail without departing from the spirit and scope of the invention as set forth in the appended claims.

Claims

1. A method for manufacturing an electrode plate for a secondary battery, the method comprising: supplying the electrode plate to a press module having a pad, the electrode plate including an active material layer and an uncoated portion; applying stamping oil absorbed in the pad to a partial area of ​​the uncoated portion of the electrode plate; as well as The electrode plate is grooved along the partial area where the punching oil is applied.

2. The method according to claim 1, wherein: The area where the punching oil is applied includes a cutting section, a non-electrode section and an electrode section, and The stamping oil is applied to a partial area of ​​the uncoated portion in the non-electrode section and a partial area of ​​the uncoated portion in the electrode section. 3 . The method according to claim 2 , wherein the stamping oil is applied only to a portion of a boundary region between the active material layer and the uncoated portion in the electrode section.

4. The method according to claim 3, wherein: In the electrode section, an application pattern of the punching oil includes a corner shape. 5 . The method according to claim 1 , wherein a width of the application pattern of the punching oil is 3 mm or less.

6. The method according to claim 1, wherein: supplying the electrode plate includes adjusting a moving speed of the electrode plate based on a length of an application pattern of the punching oil, and Applying the punching oil includes repeatedly applying the punching oil so that the application pattern of the punching oil is repeatedly and continuously formed. 7 . A secondary battery cell comprising the electrode plate for the secondary battery manufactured by the method according to claim 1 .

8. A die stamping oil applicator for applying stamping oil to an electrode plate including an active material layer and an uncoated portion, the die stamping oil applicator comprising: a pump configured to supply the stamping oil; a pad connected to the pump, the pad being made of a porous material and configured to absorb the stamping oil from the pump; as well as A pressing module supports the pad, the pressing module being configured to move in a direction perpendicular to a surface of the electrode plate and configured to apply the punching oil absorbed in the pad to a partial area of ​​the electrode plate.

9. The die stamping oil applicator of claim 8, wherein the pump is configured to supply a fixed amount of the stamping oil to the pad according to a predetermined number of applications.

10. The die stamping oil applicator of claim 8, wherein the porous material of the pad comprises polyurethane.

11. The die stamping oil applicator according to claim 8, wherein the pad protrudes from the surface of the die block, a width of the pad is 3 mm or less, and a protruding thickness of the pad is 1 mm or less.

12. The die stamping oil applicator according to claim 8, wherein: The region of the electrode plate to which the stamping oil is applied includes a cutting section, a non-electrode section, and an electrode section, the pad includes portions corresponding to the cutting section, the non-electrode section, and the electrode section of the electrode plate, respectively, and The press module is configured to apply the punching oil to a partial area of ​​the uncoated portion in the non-electrode section and a partial area of ​​the uncoated portion in the electrode section via the pad. 13 . The press die stamping oil applicator according to claim 12 , wherein the press die is configured to apply the stamping oil only to a portion of a boundary region between the active material layer and the uncoated portion in the electrode section.

14. The die stamping oil applicator of claim 13, wherein the pad is formed to include a corner shape.

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