Punching oil coating machine and punching device comprising same

Abstract

A press oil coating machine includes: a coating device configured to correspond to a feed roller that contacts and moves an electrode plate and is at different positions from each other, and to rotate to contact a pair of non-coated portions of mutually symmetrical surfaces of the electrode plate and coat the pair of non-coated portions with press oil, when the feeding roller presses the pair of non-coated parts against the coating device and moves the electrode plate; an injector configured to inject the stamping oil onto the coating device; a ram oil supply device configured to uniformly control a flow rate and a flow rate of ram oil supplied to the ejector; and a coating controller configured to control a stamping oil coating operation for the electrode plate.

Description

Technical Field

[0001] The embodiments relate to a stamping oil coating machine and a stamping device including the stamping oil coating machine. Background Art

[0002] A secondary battery can be formed by cutting an electrode plate having a surface of an electron collector coated with an active material into a size corresponding to a battery size, forming an electrode assembly by alternately stacking the cut positive and negative electrode plates with separators, and inserting the electrode assembly into a case in which an electrolyte is accommodated.

[0003] In this case, the electrode plate can be provided in the form of a film having a surface of a current collector coated with an electrode material, the electrode material being a mixture of an active material corresponding to polarity, a conductor and a binder, and the electrode material can be partially applied to the electron current collector. Therefore, the electrode plates can each include a coating portion and a non-coating portion coated with the electrode material.

[0004] The electrode tab may be formed on the non-coating portion of the film-shaped electrode plate by a punching process, and the electrode plate may be cut into a size corresponding to a battery size by a slitting process to form an electrode for a single battery.

[0005] The above information disclosed in this Background section is for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute related (or prior) art. Summary of the invention

[0006] An embodiment can be implemented by providing a stamping oil coating machine, which includes: a coating device, which is configured to: correspond to a feed roller, which contacts and moves the electrode plate and is in different positions from each other; and rotates to contact a pair of non-coated portions of the mutually symmetrical surfaces of the electrode plate and coat the pair of electrode plate portions with stamping oil, when the feed roller presses the pair of non-coated portions against the coating device and moves the electrode plate; an injector, which is configured to spray stamping oil onto the coating device; a stamping oil supply device, which is configured to uniformly control the flow rate and flow rate of the stamping oil supplied to the injector; and a coating controller, which is configured to control the stamping oil coating operation for the electrode plate.

[0007] The coating device may include: at least one first coating device at a first position, configured to correspond to at least one first feed roller of the second surface in contact with the electrode plate, and coating at least one first non-coating portion on the peripheral portion of the first surface opposite to the second surface; and at least one second coating device, at a second position separated from the first position in the conveying direction of the electrode plate, and configured to correspond to at least one second feed roller of the first surface in contact with the electrode plate, and coating at least one second non-coating portion on the peripheral portion of the second surface symmetrical to the first non-coating portion on the first surface.

[0008] The coating device may include: a support rod extending in a first direction which is a width direction of the electrode plate and being separated from the electrode plate in a second direction perpendicular to the first direction; a coating roller rotatably coupled to the support rod, the support rod passing through a central portion of the coating roller, the coating roller having a surface in which stamping oil is impregnated; and a contact driver coupled to an end of the support rod and configured to drive the support rod to make the coating roller selectively contact a pair of non-coated portions, and the coating roller can coat the pair of non-coated portions with stamping oil by rotational contact with the pair of non-coated portions.

[0009] The coating roller may include: a rotating roller coupled to the support rod through a bearing and configured to rotate the support rod around a rotation axis; and a porous coating member surrounding a surface of the rotating roller and impregnated with stamping oil.

[0010] The contact driver may include: a drive rod extending in a third direction perpendicular to the first direction and the second direction and fixed to the support rod; a drive base rotatably coupled to the drive rod; and a rod rotator configured to drive the drive rod to reciprocate around the first direction so that the coating roller selectively contacts a pair of non-coating portions.

[0011] The rod rotator may include: a driving rod rotating shaft, coupled to a driving base and to a driving rod; a rotation driving device, configured to rotate the driving rod rotating shaft; and a detector, connected to a coating controller, to detect a conveying state related to the movement and stop of the electrode plate and transmit the conveying state to the rotation driving device, and the rod rotator may be configured to rotate the driving rod so that the coating roller contacts a pair of non-coating parts when the electrode plate moves, and is configured to rotate the driving rod to separate the coating roller from the pair of non-coating parts when the electrode plate stops.

[0012] The rod rotator may include a servo motor configured to rotate the drive rod in accordance with a pulse width modulated signal.

[0013] The driving rod rotation shaft may include a cam structure configured to cause the driving rod to reciprocate and rotate within a set range.

[0014] The sprayer may be positioned above the coating roller so that the stamping oil is sprayed downward by gravity.

[0015] The sprayer may include: a spray waiting space for storing the stamping oil supplied from the stamping oil supply device; and a spray portion fluidly communicated with the spray waiting space and configured to uniformly supply the stamping oil to the coating roller.

[0016] The ejection portion may include a single slot having a length corresponding to the width of the coating roller.

[0017] The spraying portion may include a plurality of nozzles arranged at even intervals along a width of the coating roller.

[0018] The punching oil supply device may include a syringe pump.

[0019] The stamping oil supply device may include: a cylinder having a storage space in which the stamping oil can be stored; a piston located in the cylinder to seal the storage space from the outside and configured to discharge or introduce the stamping oil by adjusting the volume of the storage space through linear reciprocating motion; and a piston driver configured to control the linear reciprocating motion of the piston so as to discharge the stamping oil from the cylinder at a uniform flow rate and flow rate.

[0020] The punch oil supply device may further include a flow controller configured to set the operating unit to maintain a uniform flow rate and flow rate.

[0021] The flow controller may include a user interface for inputting the flow rate and flow rate of the stamping oil and the volume of the stamping oil stored in the storage space of the cylinder, and the flow controller may be configured to control the piston driver so that the stamping oil is discharged while keeping the flow rate and flow rate input through the user interface constant during the movement of the electrode plate, and the piston driver is stopped when the electrode plate stops.

[0022] The piston driver may include a stepper motor configured to adjust the unit rotation pitch depending on the flow rate and flow rate.

[0023] An embodiment can be implemented by providing a stamping device for secondary battery manufacturing, the stamping device comprising: a feed roller configured to contact an electrode plate having a surface including a coated portion coated with an active material and a pair of non-coated portions not coated with an electrode active material, and to convey the electrode plate by rotation; a stamping oil coating machine configured to coat a pair of non-coated portions of a mutually symmetrical surface of the electrode plate with stamping oil together; a die having an opening corresponding to a set punching shape and supporting the electrode plate coated with the stamping oil; and a press machine configured to punch the pair of non-coated portions corresponding to the punching shape to form a An electrode terminal plate, wherein a stamping oil coating machine includes a coating device, which is configured to correspond to a feed roller that contacts and moves the electrode plate and is in different positions from each other, and rotates to contact a pair of non-coated portions of the mutually symmetrical surfaces of the electrode plate and coat the pair of non-coated portions with stamping oil, when the feed roller presses the pair of non-coated portions against the coating device and moves the electrode plate; an injector, which is configured to spray stamping oil onto the coating device; a stamping oil supply device, which is configured to uniformly control the flow rate and flow rate of the stamping oil supplied to the injector; and a coating controller, which is configured to control the stamping oil coating operation for the electrode plate.

[0024] The press may include a protruding punch end that is inserted into the opening to correspond to a punching shape, the protruding punch end may be inserted into the opening to separate a portion of a pair of non-coating portions corresponding to the punching shape as waste, and the electrode terminal may include a portion of a pair of non-coating portions that remains connected to the coating portion.

[0025] The stamping apparatus may also include a loading track configured to collect waste material.

[0026] 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 to solve these problems will be clearly understood by those skilled in the art from the following description of the present disclosure.

[0027] 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

[0028] Features will become apparent to those skilled in the art by describing in detail exemplary embodiments with reference to the accompanying drawings, in which:

[0029] The following drawings attached to this specification illustrate embodiments of the present disclosure and, together with the detailed description of the present disclosure, further describe aspects and features of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited to the drawings:

[0030] Figure 1A schematic diagram is shown showing a stamping oil coating machine according to one or more embodiments of the present disclosure;

[0031] Figure 2 A schematic diagram is shown showing the relationship between an electrode plate in contact with a feed roller and a coating device according to one or more embodiments of the present disclosure;

[0032] Figure 3 A perspective view is shown showing a portion of an electrode plate according to one or more embodiments of the present disclosure;

[0033] Figure 4 A coating device of a stamping oil coating machine according to one or more embodiments of the present disclosure is shown;

[0034] Figure 5 A state in which the coating device is in contact with the non-coating portion and a state in which the coating device is separated from the non-coating portion according to one or more embodiments of the present disclosure are respectively shown;

[0035] Figure 6 shows details of a sprayer according to one or more embodiments of the present disclosure;

[0036] Figure 7 shows a perspective view showing a first variation of an ejector according to one or more embodiments of the present disclosure;

[0037] Figure 8 shows a perspective view showing a second variation of the ejector according to one or more embodiments of the present disclosure;

[0038] Fig. 9 A schematic diagram is shown showing a stamping oil supply device included in a stamping oil coating machine according to one or more embodiments of the present disclosure;

[0039] Fig.10 A schematic diagram is shown showing a stamping device including a stamping oil coating machine according to one or more embodiments of the present disclosure; and

[0040] Fig.11 A flow chart showing a method of coating a non-coating portion of an electrode plate with stamping oil by using a stamping oil coating machine according to one or more embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0041] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The terms or words used in this specification and claims should not be interpreted as limited to the usual or dictionary meanings, and should be interpreted as meanings and concepts consistent with the technical ideas of the present disclosure based on the principle that the inventor can be his / her own lexicon compiler to appropriately define the concepts of the terms to best explain his / her invention.

[0042] The embodiments described in this specification and the configurations shown in the drawings are only some embodiments of the present disclosure and do not represent all 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 when submitting this application.

[0043] It should be understood that when an element or layer is referred to as being "on," "connected to," or "coupled to" another element or layer, it may be directly on, directly connected to, or coupled to the other element or layer, or one or more intermediate elements or layers may also be present. 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 intermediate elements or layers. For example, when a first element is described as being "coupled to" or "coupled to" a second element, the first element may be directly coupled to or coupled to the second element, or the first element may be indirectly coupled to or coupled to the second element via one or more intermediate elements.

[0044] In the accompanying drawings, for clarity, the sizes of various elements, layers, etc. may be exaggerated. The same reference numerals represent the same elements. As used herein, the term "and / or" includes any and all combinations of one or more associated listed items. In addition, when describing the embodiments of the present disclosure, the use of "may" relates to "one or more embodiments of the present disclosure". Statements such as "at least one of ... " and "any one of ... " modify the entire element list when they are before the element list, without modifying the 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 of the group selected from A, B and C" or "at least one of A, B and C" are used to specify the list of elements A, B and C, the phrase may 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 terms of approximation rather than terms of degree, and are intended to take into account the inherent variations in measured or calculated values ​​that one of ordinary skill in the art would recognize.

[0045] It should be understood that although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are used to distinguish an element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer or part discussed below can be referred to as a second element, component, region, layer or part.

[0046] For ease of description, spatial relative terms such as "below", "below", "lower", "above", "upper", etc. may be used herein to describe the relationship between an element or feature as shown in the figure and another or more elements or features. It should be understood that, in addition to the orientation shown in the figure, the spatial relative terms are intended to cover different orientations of the device in use or operation. For example, if the device in the accompanying drawings is turned over, the elements described as "below" or "below" other elements or features will be oriented to be "above" or "on" other elements or features. Therefore, the term "below" can cover the orientation of above and below. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptors used herein should be interpreted accordingly.

[0047] The terms used herein are for the purpose of describing the 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 also include the plural forms, unless the context clearly indicates otherwise. It will be further understood that when used in this specification, the terms "includes", "including", "comprises" and / or "comprising" specify the presence of the features, wholes, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, parts and / or groups thereof.

[0048] In addition, any numerical range disclosed and / or listed herein is intended to include all sub-ranges of the same numerical precision contained in the listed range. For example, the range of "1.0 to 10.0" is intended to include all sub-ranges between the minimum value 1.0 and the maximum value 10.0 (and including the endpoints), 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, for example, 2.4 to 7.6. Any maximum numerical limit described herein is intended to include all lower numerical limits contained therein, and any minimum numerical limit described in this specification is intended to include all higher numerical limits contained therein. Therefore, the applicant reserves the right to modify this specification (including claims) to explicitly describe any sub-ranges contained in the range explicitly described herein.

[0049] 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 situations with deviations that are considered low in the art (e.g., 5% or less). Additionally, when a parameter is referred to as being uniform in a given area, it may mean that it is uniform in terms of average value.

[0050] Throughout the specification, unless otherwise specified, each element may be in the singular or in the plural.

[0051] Arranging an arbitrary element "above (or below)" or "on (under) another element" may mean that the arbitrary element may be disposed to be in contact with the upper (or lower) surface of the element, and another element may also be inserted between the element and any element disposed on (or under) the element.

[0052] In addition, it will be understood that when a component is referred to as being “linked,” “coupled” or “connected” to another component, the elements may be directly “coupled,” “linked” or “connected” to each other or another component may be “interposed” between the components.

[0053] Throughout the specification, unless otherwise specified, when "A and / or B" is stated, it means A, B, or A and B. That is, "and / or" includes any or all combinations of the listed multiple items. When "C to D" is stated, unless otherwise specified, it means C or greater and D or less.

[0054] As used herein, the term "or" is not necessarily an exclusive term, for example, "A or B" will include A, B, or A and B. As used herein, the terms "first", "second", etc. are only used to identify and distinguish, and are not intended to imply or require sequential inclusion (for example, a third element and a fourth element can be described without implying or requiring the existence of the first element or the second element).

[0055] Figure 1 A schematic diagram is shown showing a stamping oil coating machine according to one or more embodiments of the present disclosure. Figure 2 A schematic diagram is shown showing the relationship between an electrode plate in contact with a feed roller and a coating device according to one or more embodiments of the present disclosure. Figure 3 A perspective view is shown showing a portion of an electrode plate EP according to one or more embodiments of the present disclosure.

[0056] Reference Figure 1 , Figure 2 and Figure 3 According to an embodiment of the present disclosure, a stamping oil coating machine 500 may include: a coating device 100, which presses a non-coating portion NO onto a feed roller FR and makes the non-coating portion NO contact the feed roller FR, and coats the non-coating portion NO with stamping oil PO; an injector 200 that sprays stamping oil PO; a stamping oil supply device 300 that supplies stamping oil PO to the injector 200; and a coating controller 400, which controls the operation of coating the electrode plate EP with stamping oil PO.

[0057] The stamping oil coating machine 500 can coat the die 700 with stamping oil PO (see Fig.10 ) of the electrode plate EP to help reduce friction on the non-coating portion NO during the punching process and to help prevent partial burning and adhesion of the active material coated on the active material EP.

[0058] In an embodiment, the electrode plate EP may contact a plurality of feed rollers FR arranged at different positions, and may be moved in a constant conveying direction D by the rotation of the feed rollers FR. In an embodiment, the electrode plate EP moved by the rotation of the first feed roller FR1 may move upward toward the second feed roller FR2 at an upper portion, wrap around the rotating second feed roller FR2, and then move downward again. Subsequently, the electrode plate EP may move upward again by the rotation of the third feed roller FR3, move in a horizontal direction by the rotation of the fourth feed roller FR4, and move to the punching device.

[0059] In an embodiment, the first feed roller FR1, the second feed roller FR2, the third feed roller FR3, and the fourth feed roller FR4 may change the conveying direction while conveying the electrode plate EP, and thus, the surface of the electrode plate EP wound around the feed roller or facing the feed roller may be alternately changed. In an embodiment, the first feed roller FR1 may contact the second surface S2 of the electrode plate EP, and the second feed roller FR2 may contact the first surface S1 of the electrode plate EP. In an embodiment, the third feed roller FR3 may contact the second surface S2, and the fourth feed roller FR4 may contact the first surface S1. In an embodiment, whenever the electrode plate EP passes through the feed rollers FR while being conveyed, the first surface S1 and the second surface S2, which may be symmetrically positioned, may be alternately exposed.

[0060] The electrode plate EP may be in the form of a film including a coating portion O (coated with an active material) and a non-coating portion MO not coated with an active material, and may have two peripheral portions or one peripheral portion in the width direction. A pair of cylindrical feed rollers FR (or one feed roller) may be configured to feed the electrode plate EP while contacting the two peripheral portions of the electrode plate EP. Therefore, the first to fourth feed rollers FR1 to FR4 may each have a single cylindrical shape extending in a first direction I (e.g., longitudinal direction) as the width direction of the electrode plate EP, such as Figure 2 shown.

[0061] like Figure 3 As shown, the non-coating portion NO may include a first non-coating portion NO1 surrounding the first surface S1 of the electrode plate EP or on the first surface S1 of the electrode plate EP, and a second non-coating portion NO2 on the second surface S2 and symmetrical to the first non-coating portion NO1 (e.g., covering the first non-coating portion NO1 and aligned with it).

[0062] The coating apparatus 100 may include a first coating machine 100 a configured to coat the first non-coating portion NO1 with the punching oil PO and a second coating machine 100 b configured to coat the second non-coating portion NO2 with the punching oil PO.

[0063] The first coating machine 100a may be positioned to correspond to or be adjacent to the first feed roller FR1 at a first position, so as to contact the first non-coating portion NO1 through the first feed roller FR1 and press the first non-coating portion NO1 against the first feed roller FR1, thereby coating the non-coating portion NO1 with the stamping oil PO. The second coating machine 100b may be positioned to correspond to or be adjacent to the second feed roller FR2 at a second position (higher than the first position), so as to contact the second non-coating portion NO2 through the second feed roller FR2 and press the second non-coating portion NO2 against the second feed roller FR2, thereby coating the non-coating portion NO2 with the stamping oil PO. In an embodiment, the first coating machine 100a and the second coating machine 100b may contact or separate the first non-coating portion NO1 and the second non-coating portion NO2 together at the first position and the second position, and may coat the first non-coating area NO1 and the second non-coating area NO2 symmetrically positioned (or formed on different sides) together with the stamping oil PO.

[0064] In an embodiment, in a state where a pair of first non-coating portions NO1 and second non-coating portions NO2 are located at two peripheral portions of the first surface S1 and the second surface S2, the first coating machine 100a and the second coating machine 100b may be arranged in pairs to coat all non-coating portions NO on the electrode plate EP together with stamping oil PO.

[0065] The first non-coating portion NO1 and the second non-coating portion NO2, which may be symmetrically positioned at one peripheral portion of the electrode plate EP, may form an electrode tab by a punching process to be described below. The first non-coating portion NO1 and the second non-coating portion NO2, which may be symmetrically positioned at different peripheral portions of the electrode plate EP, may be removed by a punching process to be described below.

[0066] The first coating machine 100a and the second coating machine 100b are terms for classifying the coating device 100 according to the position of the non-coating area of ​​the coating target, and may have substantially the same configuration. Therefore, for ease of description, the coating device and the coating machine may be used interchangeably.

[0067] In an embodiment, the punching oil PO may be supplied to the injector 200 at a constant flow rate and flow rate, and the injector 200 may uniformly supply the punching oil PO to the coating device 100 , thereby uniformly coating the non-coating portion NO with the punching oil PO.

[0068] The operation of the coating device 100, the injector 200, and the stamping oil supply device 300 may be controlled by the coating controller 400. In an embodiment, the coating device 100 may contact the non-coating portion NO to be coated with the stamping oil PO only when the electrode plate EP is conveyed, and the coating device 100 may be separated or spaced apart from the non-coating portion NO when the electrode plate EP is stopped. In an embodiment, when the electrode plate EP is stopped, the stamping oil PO may also be automatically stopped from being applied to the non-coating portion NO, and thus, the non-coating portion NO may be prevented from being excessively coated with the stamping oil PO.

[0069] Figure 4 The coating device of the stamping oil coating machine according to one or more embodiments of the present disclosure is shown. As shown, the coating device 100 can selectively contact the non-coating portion NO of the electrode plate EP and coat the non-coating portion NO with the stamping oil PO while rotating according to the linear movement of the electrode plate EP.

[0070] In an embodiment, the coating device 100 may include a support rod 110, a coating roller 120 rotatably coupled to the support rod 110 (e.g., coupled to one end of the support rod 110), and a contact driver 130 that rotates the support rod 110 to selectively adjust the contact between the coating roller 120 and the non-coating portion 110. In an embodiment, the coating roller 120 may include a rotating roller 121 (including a through hole penetrating the center thereof) and a coating member 122 surrounding the outer circumferential surface of the rotating roller 121. The rotating roller 121 may have sufficient strength and rigidity to maintain a cylindrical shape during the contact process with the non-coating portion NO. In an embodiment, the rotating roller 121 may have a cylindrical shape, and may be made of a light metal (e.g., aluminum and its alloys) or a plastic having sufficient hardness, and may have a set width.

[0071] A rotation coupling member such as a bearing may be on an inner surface of the rotating roller 121 and may define a through hole to be coupled to the support rod 110 and may have a roller width w corresponding to or approximately equal to a width d of the non-coating portion NO.

[0072] The coating member 122 may surround the outer surface of the rotating roller 121, and the punching oil PO may be sprayed from the sprayer 200 to the upper portion of the coating member 122 in the gravity direction so that the punching oil PO may be impregnated into the coating member 122. The coating member 122 may have a width w substantially equal to the width of the rotating roller 121.

[0073] In a state where the coating member 122 (into which the stamping oil PO has been impregnated) is in contact with the non-coating portion NO, the rotating roller 121 may rotate as the electrode plate EP is conveyed, for example, by a friction force caused by a load of the rotating roller 121. In an embodiment, the coating member 122 may also rotate as the electrode plate EP moves, and the stamping oil PO may be applied to the non-coating portion NO.

[0074] In an embodiment, as described below, the stamping oil PO supplied by the injector 200 may be uniformly impregnated along the width w of the coating member 122, and thus, the impregnation concentration of the stamping oil PO in the coating member 122 may be uniformly maintained. In an embodiment, the non-coating portion NO may be uniformly coated with the stamping oil PO. The coating member 122 may be made of a porous material to help improve the impregnation performance of the stamping oil PO. In an embodiment, the coating member 122 may be made of a porous foam having micropores.

[0075] The support rod 110 may be an axial member that is separated from the electrode plate EP in a second direction II that is a radial direction of the feed roller FR, is substantially perpendicular to a first direction I that is a width direction of the coating roller 120, and extends in the first direction I (e.g., longitudinally). The support rod 110 may pass through a through hole of the coating roller 120, and may be coupled to the coating roller 120 by a rotation coupling member (e.g., a bearing). In an embodiment, the coating roller 120 may rotate around the support rod 110, for example, according to the movement of the electrode plate EP in contact with the coating roller 120.

[0076] One end of the support rod 110 may be connected to the contact driver 130 and rotate around the first direction I. The contact driver 130 may be connected to the coating controller 400 to selectively rotate the support rod 110 according to the conveying (e.g., movement) and stopping of the electrode plate EP, thereby making the coating roller 120 contact the non-coating portion 110 or separating the coating roller 120 from the non-coating portion 110. In an embodiment, the contact driver 130 may include a driving rod 131, a driving base 132, and a rod rotator 133.

[0077] The driving rod 131 may extend in a third direction III (e.g., longitudinal direction) perpendicular to the first direction I, and may help fix or control the position of the support rod 110 in the second direction II. In an embodiment, the driving rod 131 may be a single elongated member having sufficient rigidity, and may be fixed to one end of the support rod 110 and may transmit the rotational force applied to the driving rod 131 to the support rod 110. In an embodiment, the driving rod 131 may be fixed to one end of the support rod 110 by a coupling structure.

[0078] The driving base 132 may be a three-dimensional structure that rotatably fixes the end of the driving rod 131. In an embodiment, the driving base 132 may be on a stamping reference surface. In an embodiment, the driving base 132 may have a coupling groove at the center of the driving base 132 so that the driving rod 131 may be coupled to the driving base 132. The driver 130 may be provided as various structures, which may help protect the driving rod 131 from external influences and stably rotate the driving rod 131 by absorbing vibrations or shocks.

[0079] The rod rotator 133 may transmit the rotational force to the driving rod 131 by using an external driving force. In an embodiment, the rod rotator 133 may drive the driving rod 131 to reciprocate in a first direction I so that the coating roller 120 fixed to the driving rod 131 by the support rod 110 may selectively contact the non-coating portion NO. In an embodiment, the rod rotator 133 may include a driving rod rotating shaft 133a and a rotation driving device 133b, the driving rod rotating shaft 133a being coupled to the driving base 132 to pass through the coupling groove and protrude to one side of the driving base 132, and the rotation driving device 133b rotating the driving rod rotating shaft 133a. In an embodiment, the rod rotator 133 may also include a first detector 133c, the first detector 133c detecting a conveying state related to the movement and stop of the electrode plate EP, and transmitting the conveying state to the servo motor 133b.

[0080] One end of the driving rod rotating shaft 133a may protrude to the outside of the driving base 132, and the other end may pass through the coupling groove to be rotatably coupled to the driving base 132. The end of the driving rod 131 may be fixed to the driving rod rotating shaft 133a in the coupling groove, and the driving rod 131 may also rotate by the reciprocating rotation of the driving rod rotating shaft 133a. In an embodiment, the driving rod rotating shaft 133a may include a cam structure in the coupling groove, and the driving rod 131 may reciprocate and rotate within a certain range along the moving path of the cam structure by the rotation of the driving rod rotating shaft 133a.

[0081] The rotation driving device 133b may be coupled to the driving rod rotating shaft 133a (protruding to the outside of the driving base 132) to rotate the driving rod rotating shaft 133a. In an embodiment, the rotation driving device 133b may include a servo motor that generates a rotation motion according to a pulse width modulation (PWM) signal.

[0082] The first detector 133c may be connected to the coating controller 400, and may detect the conveying state (e.g., movement and stop) of the electrode plate EP, and send information about the conveying state to the rotation drive device 133b. The coating controller 400 may organically control the stamping process and the stamping oil coating process, and may selectively stop the conveying of the electrode plate EP as needed. In an embodiment, the first detector 133c may detect a signal related to the movement and stop of the electrode plate from the coating controller 400, and may send a signal to the rotation drive device 133b, and the rotation drive device 133b may rotate the drive rod rotation shaft 133a in response to the signal related to the movement of the electrode plate EP, and stop the drive rod rotation shaft 133a in response to the signal related to the stop of the electrode plate EP. In an embodiment, the first detector 133c may be omitted, and the coating controller 400 may directly control the operation of the rotation drive device 133b.

[0083] In an embodiment, when the electrode plate EP moves, the driving rod 131 can rotate to make the coating roller 120 contact the non-coating portion NO, and when the electrode plate EP stops or is stopped, the driving rod 131 can rotate to separate the coating roller 120 from (e.g., move away from) the non-coating portion NO.

[0084] In an embodiment, as shown in the figure, the driving rod 131 can be reciprocated by a servo motor or the like, and the coating roller 120 can be in contact with or separated from the non-coating portion 110. In an embodiment, the contact driver 130 can be configured in various ways as long as the coating roller 120 can be in contact with or separated from the non-coating portion 110 as needed.

[0085] The stamping reference surface may be a base surface of the stamping oil coating machine 500, and may be a stamping oil coating machine and a stamping device including the stamping oil coating machine ( Fig.10 The bottom surface on which the feed roller FR and the coating roller 120 are located, or a separate reference surface that rises from the bottom surface and determines the positions of the feed roller FR and the coating roller 120.

[0086] In an embodiment, when the feed roller FR is in different positions in the vertical direction, the position of the coating roller 120 can be different from each other in the vertical direction, and therefore, the length of the driving rod 131 fixed to the support rod 110 (the support rod 110 passes through the coating roller 120) can also be changed.

[0087] Figure 5 A state in which the coating device is in contact with the non-coating portion and a state in which the coating device is separated from the non-coating portion according to one or more embodiments of the present disclosure are respectively illustrated. Figure 5 Part (a) shows a state where the coating device 100 is in contact with the electrode plate EP, and Figure 5Part (b) shows a state in which the coating device 100 is separated from the electrode plate EP.

[0088] When the electrode plate EP is conveyed, the coating roller 120 may contact the non-coating portion NO of the electrode plate EP, such as Figure 5 On the contrary, when the conveying of the electrode plate EP stops or has stopped, the coating roller 120 can be separated from the non-coating portion NO of the electrode plate EP, as shown in FIG. Figure 5 As shown in part (b). In an embodiment, the driving rod 131 may be fixed to the support rod 110 passing through the coating roller 120, and the driving rod rotating shaft 133a (on which the driving rod 131 is fixed) may be rotated to selectively bring the coating roller 120 into contact with the non-coating portion 110. In an embodiment, the conveying state of the electrode plate EP may be detected by the first detector 133c, and the driving rod rotating shaft 133a may be selectively rotated according to the detected movement state of the electrode plate or the detected stop state of the electrode plate to bring the coating roller 120 into contact with the non-coating portion NO or to separate the coating roller 120 from the non-coating portion NO.

[0089] Reference again Figure 1 , the injector 200 may be above the coating roller 120 and may inject the stamping oil PO to the coating roller 120. In an embodiment, the injector 200 may uniformly inject the stamping oil PO in a direction of the width w of the coating roller 120 to uniformly maintain the density or amount of the stamping oil PO applied to the non-coating portion NO.

[0090] In an embodiment, at least one pair of coating rollers 120 or two pairs of coating rollers 120 may be arranged to correspond to the respective feed rollers FR, and the injectors 200 may be positioned one-to-one with the coating rollers 120 and may supply the punching oil PO to each coating roller 120 individually.

[0091] In an embodiment, when the electrode plate EP is conveyed, the injector 200 may be positioned on the upper portion of the coating roller 120 and may inject the punching oil PO to the coating roller 120. In contrast, in a state where the conveyance of the electrode plate EP has stopped, the injector 200 may stop injecting the punching oil PO.

[0092] Figure 6 The ejector according to one or more embodiments of the present disclosure is shown in detail. Figure 6The injector 200 may include: a main body 210, which is connected to the stamping oil supply device 300 and may include an injection waiting space R for storing the supplied stamping oil PO and preparing for injection; and an injection portion 220, which is located in the outer portion of the main body 210, is fluidically connected to the injection waiting space R, and uniformly injects the stamping oil PO stored in the injection waiting space R to the coating roller 120.

[0093] The body 210 may have a three-dimensional shape including an injection waiting space R (eg, an internal space separated from the outside and connected to the punching oil supply device 300 through the supply line 340). The punching oil PO supplied through the supply line 340 may be stored in the injection waiting space R of the body 210.

[0094] The spray portion 220 may be located outside the body 210 to face the coating roller 120, and may be fluidly connected to the spray waiting space R of the body 210. The stamping oil PO may be sprayed onto the surface of the coating roller 120 through the spray portion 220. In an embodiment, the spray portion 220 may include at least one spray hole in the rear surface or the bottom surface of the body 210. The coating member 122 may be made of porous foam so that the stamping oil PO may be easily impregnated into the coating member 122.

[0095] In an embodiment, the spraying portion 220 may be constructed or arranged in a linear shape having a spraying length L corresponding to or approximately equal to the width w of the coating roller 120 to uniformly spray the punching oil PO onto the coating member 122. The punching oil PO may be sprayed along the spraying length L to uniformly impregnate the coating member 122, for example, in the direction of the width w. In an embodiment, the coating member 122 may uniformly maintain the impregnation concentration of the punching oil.

[0096] Figure 7 A perspective view is shown showing a first variation of an injector according to one or more embodiments of the present disclosure. Figure 7 As shown, the first modified injector 200a may have Figure 6 The illustrated injector 200 is of substantially the same construction, except that the injection portion 220 may be a continuous injection slot 220a.

[0097] The spraying slot 220a may have a protruding structure extending from one side of the body 210 to the outside, may have a spraying length L, and may have a linear slot with its central portion open. In an embodiment, the stamping oil stored in the spray waiting space R may be continuously sprayed in the width direction of the coating member 122 along the spraying slot 220a.

[0098] Figure 8A perspective view is shown showing a second variation of the injector according to one or more embodiments of the present disclosure. Figure 8 As shown, the second variant of the injector 200b may have Figure 6 The illustrated injector 200 is of substantially the same construction except that the injection portion 220 may include a plurality of nozzles 220b arranged at equal intervals.

[0099] A tank T having a spray waiting space R in fluid communication with a pipe connected to the supply line 340 may be located inside the body 210 , and the nozzle 220 b may be in fluid communication with the spray waiting space R and located at a lower portion of the tank T.

[0100] The nozzles 220 b may be arranged at regular intervals along the direction of the length L, and each nozzle may have one end fluidly connected to the spray waiting space R and another end adjacent to the upper surface of the coating member 122 , and may extend outward from the body 210 to be adjacent to the surface of the coating member 122 .

[0101] In an embodiment, the space between the nozzles 220b may be adjusted so that a diffusion area of ​​the punching oil sprayed from each nozzle 220b corresponds to the space between adjacent nozzles.

[0102] Reference again Figure 1 , the stamping oil supply device 300 may supply the stamping oil to the injector 200 at a constant flow rate and flow rate. In an embodiment, the stamping oil supplied at a constant flow rate may be uniformly sprayed onto the coating member 122 by the injector 200, and thus, the density or amount of the stamping oil impregnated in the coating roller 120 may be uniform. In an embodiment, the stamping oil supply device 300 may include a pump structure for maintaining a constant flow rate and flow rate of the supplied stamping oil.

[0103] Fig. 9 FIG. 2 is a schematic diagram showing a stamping oil supply device included in a stamping oil coating machine according to one or more embodiments of the present disclosure. Fig. 9 As shown, the stamping oil supply device 300 may include a plurality of pump structures independently connected to the injectors 200. The injectors 200 may be individually connected to the stamping oil supply device 300, and the injectors 200 may be provided for each coating device 100, and thus, the stamping oil supply device 300 may be provided for each coating device 100.

[0104] In an embodiment, the stamping oil supply device 300 may include an injection cylinder 310, a piston 320, a piston driver 330, a supply line 340, an inflow line 350, and a flow controller 360. The injection cylinder 310 may have a piston space PR (whose size may be variably adjusted by the piston 320 in the injection cylinder 310, and which contains the stamping oil PO). The injection cylinder 310 may be connected to the injector 200 through the supply line 340, and connected to the stamping oil reservoir POR through the inflow line 350.

[0105] In an embodiment, the injection cylinder 310 may have various shapes or materials as long as the injection cylinder 310 has sufficient strength to maintain the shape and size of the piston space PR. One end of the injection cylinder 310 may be coupled to a supply line 340 connected to the injector 200, and an inflow line 350 in fluid communication with the piston space PR may be located on a portion of the injection cylinder 310.

[0106] After the piston space PR is reduced by the forward movement of the piston 320, the stamping oil PO in the piston space PR may be supplied to the injector 200 along the supply line 340. In contrast, after the piston space PR has been increased by the backward movement of the piston 320, the stamping oil PO may flow from the stamping oil reservoir POR into the piston space PR along the inflow line 350. In an embodiment, a vacuum pump may be further included, which may help improve the inflow efficiency of the stamping oil PO from the stamping oil reservoir POR by making the pressure of the piston space PR lower than the atmospheric pressure.

[0107] The piston driver 330 may control the linear reciprocating motion of the piston 320 to uniformly adjust the flow rate and flow rate of the punching oil PO discharged from the injection cylinder 310. In an embodiment, a flange may be positioned in the end of the piston 320, and the piston driver 330 may be coupled to the flange to accurately control the linear motion of the flange to correspond to the set flow rate and flow rate. In an embodiment, the flow rate and flow rate of the punching oil PO supplied to the injector 200 may be uniformly set, and a constant flow rate of the punching oil PO may be supplied to the injector 200 over time.

[0108] In an embodiment, the piston driver 330 may be a stepper motor capable of adjusting the unit rotation pitch according to the flow rate and flow rate. In an embodiment, various drive structures may be used as the piston driver 330 as long as the punching oil PO can be supplied to the injector 200 at a constant flow rate and flow rate.

[0109] The supply line 340 may connect the injection cylinder 310 to the injector 200 so that the stamping oil stored in the cylinder 310 may be supplied to the injector 200 by the forward movement of the piston 320. The inflow line 350 may connect the cylinder 310 to the stamping oil reservoir POR so that the stamping oil may flow into the cylinder 310 by the backward movement of the piston 320. The supply line 340 and the inflow line 350 may each be formed of a flexible pipe to increase the installation freedom of the stamping oil supply device 300.

[0110] The flow controller 360 can control the piston driver 330 so that the punching oil PO can be supplied at a set flow rate and flow rate. In an embodiment, the operating unit of the piston driver 330 can be set to supply the punching oil PO at a set flow rate and flow rate. In a state where the piston driver 330 is configured as a stepper motor, the flow controller 360 can adjust the unit rotation pitch of the stepper motor to a pitch corresponding to the flow rate and flow rate.

[0111] The flow controller 360 may be connected to the coating controller 400. In an embodiment, the flow controller 360 may include a second detector 361 for detecting movement and stop states of the electrode plate EP and a user interface 362 for inputting flow, flow rate and volume of the punching oil PO stored in the piston space PR of the injection cylinder 310.

[0112] Similar to the first detector 133c, the second detector 361 may be connected to the coating controller 400 and detect the conveying state of the electrode plate EP that repeatedly stops and moves according to the driving conditions of the punching device 1000. The piston driver 330 may be controlled by the flow controller 360 to operate or stop according to the detected conveying state of the electrode plate EP. In an embodiment, the second detector 361 may be omitted, and alternatively, the coating controller 400 may directly control the flow controller 360.

[0113] The user interface 362 can set the control reference of the piston driver 330 for the flow controller 360 by setting the flow rate and flow rate of the supplied punching oil PO. The user interface 362 can be in the form of a touch panel, a keyboard, or a mouse, for example, so that the user can easily input data. In an embodiment, the user interface 362 can receive the setting value from a central management device (e.g., a central management server).

[0114] The flow controller 360 may include a control center connected to the second detector 361 and the user interface 362 and controls the operation of the piston driver 330. In an embodiment, the piston driver 330 may discharge the punching oil PO from the cylinder 310 at a flow rate and flow rate set according to the delivery state of the electrode plate EP.

[0115] The flow controller 360 can control the piston driver 330 so that the stamping oil PO input through the user interface 362 can be discharged at a constant flow rate and flow rate when the electrode plate EP moves, and can control the piston driver 330 so that the piston driver 330 can stop when the electrode plate EP stops.

[0116] In an embodiment, the punching oil supply device 300 may include a plurality of injection pumps capable of accurately controlling the flow rate and flow rate of the fluid. The injection pumps may correspond to the injectors 200 respectively to adjust the flow rate and flow rate of the punching oil PO of each injector 200.

[0117] Reference again Figure 1 , the coating controller 400 may gradually control the stamping oil coating process for the non-coating portion NO of the electrode plate EP to perform uniform supply and uniform coating of the stamping oil PO.

[0118] In an embodiment, the coating controller 400 may organically control the stamping oil coating process by obtaining process progress information about the active material coating process (which is a process before the stamping oil PO is coated) and the stamping process (which is a process after the stamping oil PO is coated).

[0119] In an embodiment, in a state where the conveyance of the electrode plate EP through the feed roller FR has been stopped, for example due to defects in the active material coating process and / or the stamping process, the coating controller 400 can selectively prevent the contact between the coating roller 120 and the non-coated portion NO to automatically prevent the non-coated portion NO from being over-coated by the stamping oil PO.

[0120] The coating controller 400 may include a conveying state detector 410 for detecting state information about the conveying state of the electrode plate EP, and may transmit the detected state information about the conveying state of the electrode plate EP to the first detector 133c and the second detector 361. In an embodiment, the conveying state detector 410 may further include a detection sensor for directly detecting whether the electrode plate EP is moving, or may include an abnormal signal detector for detecting a signal about a process abnormality in the active material coating process or the stamping process.

[0121] The coating controller 400 may include a supply controller 420, which may control the operation of the feed roller FR when the conveyance of the electrode plate EP is to be forcibly stopped and forcibly control the conveyance of the electrode plate EP for the coating control process. In an embodiment, the coating controller 400 may also include various control devices to uniformly coat the non-coating portion NO with the stamping oil PO.

[0122] According to the above-mentioned stamping oil coating machine, the stamping oil PO can be supplied to the injector 200 while maintaining a constant flow rate and flow rate. In an embodiment, by forming the injection hole of the injector 200 to be the same as the width direction of the coating roller 120, the impregnation concentration of the stamping oil PO of the coating roller 120 can be kept constant. In an embodiment, coating the non-coating portion NO with the stamping oil can be performed by rotating contact with the coating roller 120, and the stamping concentration of the stamping oil PO applied to the non-coating portion NO can be kept uniform.

[0123] In an embodiment, coating efficiency may be improved by coating the first and second non-coating portions NO together on mutually symmetrical surfaces of the electrode plate EP with the punching oil PO.

[0124] In an embodiment, by automatically adjusting the contact between the coating roller 120 and the non-coating portion NO according to the movement and stop state of the electrode plate EP, the non-coating portion NO that has stopped can be prevented from being over-coated by the stamping oil PO. In an embodiment, when the electrode plate EP stops, the non-coating portion NO can be separated from the coating roller 120 by the contact driver 130, and the stamping oil PO can be prevented from being supplied to the injector 200.

[0125] In the embodiment, the coating efficiency of the non-coating portion NO with the punching oil PO can be improved, and the coating uniformity can be improved.

[0126] Fig.10 A schematic diagram is shown showing a stamping device including a stamping oil coating machine according to one or more embodiments of the present disclosure. Figure 1 The same components in the figure may be omitted from repeated detailed descriptions of the same components. Fig.10 As shown, the punching device 1000 may include a feed roller 600 , a punching oil coating machine 500 , a die 700 for punching, and a press machine 800 .

[0127] After the active material coating process of coating the electrode base layer with the active material is completed and the electrode plate EP including the coating portion O and the non-coating portion NO is prepared, the electrode plate EP can be transferred to the stamping device to form an electrode terminal tab on or from the non-coating portion NO. In an embodiment, the electrode plate EP can be made of, for example, a flexible film (the flexible film is formed of, for example, a polymer) and can be wound on a cylindrical reel. Therefore, the electrode plate EP can be unrolled from the cylindrical reel and then transferred to the stamping device through a plurality of feeding rollers 600.

[0128] The feed roller 600 may be positioned at an inflection point where the conveying direction is changed to maintain the tension of the conveyed electrode plate EP (e.g., a polymer type electrode plate EP) and change the conveying direction. In an embodiment, the feed roller 600 may be positioned on both peripheral portions of the electrode plate EP, and thus, the electrode plate EP may be conveyed while being in contact with a pair of feed rollers 600 at each inflection point.

[0129] Before being transferred to the stamping device, the non-coated portion NO of the electrode plate EP may be uniformly coated with the stamping oil PO by the stamping oil coating machine 500. The stamping oil PO may be constantly supplied to the injector 200 by using the stamping oil supply device 300, wherein the stamping oil supply device 300 may supply the stamping oil PO at a constant flow rate like a syringe pump, and the injector 200 may uniformly maintain the impregnation concentration or amount of the coating roller 120 by uniformly spraying the stamping oil PO in the width direction of the coating roller 120.

[0130] The coating roller 120 having a uniform impregnation concentration may coat the non-coating portion NO with the punching oil PO by rotationally contacting the non-coating portion NO. In an embodiment, the punching oil PO may be uniformly applied to the non-coating portion NO.

[0131] In an embodiment, the contact between the coating roller 120 and the non-coating portion NO may be maintained only when the electrode plate EP is conveyed. In an embodiment, the electrode plate EP may be stopped and the coating roller 120 may be separated from the electrode plate EP to prevent the non-coating portion NO from being over-coated by the punching oil PO.

[0132] In an embodiment, a plurality of coating rollers 120 may be located at adjacent inflection points to coat the first non-coating portion NO1 and the second non-coating portion NO2 on the first surface S1 and the second surface S2 of the electrode plate EP, respectively, symmetrical to each other, with the stamping oil PO. In an embodiment, the coating efficiency of the non-coating portion NO with the stamping oil PO may be improved.

[0133] The stamping oil coating machine 500 may have Figure 1 The punching oil coating machine 500 shown has substantially the same configuration, and a repeated detailed description of the punching oil coating machine 500 may be omitted.

[0134] The mold 700 may include a base on which the electrode plate EP is securely positioned to perform a punching process on the non-coating portion NO. The mold 700 may have an opening 710 corresponding to a set punching shape and penetrating the base, and the electrode plate EP may be on an upper surface of the mold 700 to cover the opening 710.

[0135] In order to form the electrode tab by the punching device 1000, another area of ​​the non-coating portion 110 (e.g., not including the electrode tab) may have a punching shape, and the opening 710 may be positioned to correspond to the punching shape. In an embodiment, the rear surface of the non-coating portion 110 corresponding to the punching shape may be securely positioned on the upper surface of the mold 700 to be exposed through the opening 710.

[0136] In an embodiment, the electrode plate EP may be positioned on the upper surface of the mold 700, and a press machine 800 (including a punch end having a shape corresponding to the punching shape) may press the non-coating portion NO from the upper portion of the mold 700 to separate the non-coating portion NO corresponding to the punching shape from the electrode plate EP. Therefore, a portion of the non-coating portion NO that is not separated by the punch end and remains on the electrode plate EP may form an electrode tab, and a portion of the non-coating portion NO having a shape corresponding to the punch end and separated from the electrode plate EP may be waste and fall downward through the opening 710. In an embodiment, the non-coating portion NO may be coated with a punching oil PO to have a uniform thickness and be punched by the press machine 800, friction may be reduced, and an electrode tab and waste that accurately match the punching shape may be obtained.

[0137] The waste material may move through the opening 710, may be collected by the loading rail 900 near the opening 710, and may be discharged from the punching device 1000. By uniformly applying the punching oil PO along at least one pair of non-coating portions NO on the peripheral portions of both sides of the electrode plate EP, it is possible to easily obtain waste material that matches the punching shape. Therefore, it is possible to help prevent a decrease in loading efficiency due to the waste material deviating from the punching shape during the process of collecting the waste material.

[0138] Fig.11 A flow chart is shown showing a method for coating a non-coated portion of an electrode plate with stamping oil by using a stamping oil coating machine according to one or more embodiments of the present disclosure. Figures 1 to 7 The same components are described herein and their repeated detailed descriptions may be omitted.

[0139] like Fig.11As shown, the method can start by supplying stamping oil PO to the injector 200 at a constant flow rate and flow rate (S100). In an embodiment, the stamping oil PO stored in the injection cylinder 310 can be pressurized by the piston 320 and can be discharged to the supply line 340 at a set flow rate and flow rate through the user interface 362. The discharged stamping oil PO can be supplied to the injector 200 along the supply line 340. In an embodiment, the piston 320 can be linearly moved in the injection cylinder 310 by a piston driver 330, and the piston driver 330 can accurately adjust the operating unit according to the flow rate and flow rate of the stamping oil PO, such as a synchronous motor. In an embodiment, the stamping oil PO can be supplied to the injector 200 by using an injection pump.

[0140] Next, the stamping oil PO may be injected from the injector 200 to the coating roller 120 to be impregnated into the coating roller 120 at a uniform concentration (S200). The injector 200 may include an injection portion 220 extending in the width direction of the coating roller 120, and may uniformly inject the stamping oil PO along the circumferential surface of the coating roller 120. Therefore, the circumferential line of the coating roller 120 corresponding to the injection portion 220 may be impregnated with the stamping oil at a uniform concentration. By continuously maintaining a constant stamping oil concentration along the circumferential line of the rotating coating roller 120, the impregnation concentration of all coating rollers 120 may be uniform.

[0141] Next, the coating roller 120 (in which the stamping oil PO is impregnated) may selectively contact the non-coating portion NO of the electrode plate EP being conveyed, and the non-coating portion NO may be coated with the stamping oil PO by the rotational contact between the coating roller 120 and the non-coating portion NO (S300). The coating roller 120 is rotatably coupled to a support rod 110 passing through a central portion of the coating roller 120. In an embodiment, the support rod 110 may extend downward and may be fixed to a rotatable driving rod 131, and the coating roller 120 may selectively contact the non-coating portion 110 by the rotation of the driving rod 131.

[0142] In an embodiment, when the electrode plate EP is conveyed, the coating roller 120 may contact the non-coating portion NO, and when the electrode plate EP stops, the driving rod 131 may rotate to separate the coating roller 120 from the non-coating portion NO. Therefore, the non-coating portion NO may be prevented from being over-coated with the punching oil PO due to continuous coating of the stopped non-coating portion NO, and the non-coating portion NO may be uniformly coated with the punching oil PO in the longitudinal direction.

[0143] By uniformly applying the punching oil in the width direction of the coating roller 120 and maintaining the impregnation concentration uniformly along the contact surface of the coating roller 120 , the punching oil may be uniformly applied to the coating roller 120 without any non-applied area.

[0144] In an embodiment, the coating roller 120 may be at different positions and may coat a pair of the first non-coating portion NO1 and the second non-coating portion NO2 on the symmetrical surface of the electrode plate EP together with the punching oil PO.

[0145] The electrode plate EP may be continuously conveyed by rotating a second feed roller FR2 in contact with a second surface S2 of the electrode plate EP at a first position and rotating a first feed roller FR1 in contact with a first surface S1 of the electrode plate EP symmetrical to the second surface S2 at a second position separated from the first position. In an embodiment, a first non-coating portion NO1 on the first surface S1 and a second non-coating portion NO2 on the second surface S2 may be in contact with the second feed roller FR2 and the first feed roller FR1 to be pressed together by the second feed roller FR2 and the first feed roller FR1, and the first non-coating portion NO1 and the second non-coating portion NO2 may be independently coated together by the rotation of a coating roller included in the first coating machine 100a and the second coating machine 100b and in which the stamping oil is immersed. Therefore, by coating the non-coating portions located on the upper and lower surfaces of the electrode plate EP, the coating efficiency may be greatly improved.

[0146] By way of summary and review, in order to form an electrode tab on a non-coating portion by punching using a press machine, the non-coating portion may be coated with a punching oil to help reduce friction between the punch end and the electrode plate during the punching process and to help prevent the active material from burning and adhering to the boundary of the punch end that contacts the non-coating portion. Therefore, a punching oil coating machine may be positioned at the front end of a die for punching to first apply the punching oil before the non-coating portion is punched.

[0147] Some stamping oil coating machines may apply stamping oil by using a spraying method, and a non-coating portion where the stamping oil is not uniformly applied may occur. Some stamping oil coating machines may spray stamping oil regardless of the conveying state of the electrode plate, and the stamping oil may be excessively applied to the electrode plate in a stopped state.

[0148] Therefore, the stamping oil coating machine and the stamping device including the same can help improve the coating uniformity of the stamping oil and can help prevent the electrode plate from being coated with the stamping oil in a stopped state.

[0149] According to the stamping oil coating machine of the embodiment and the stamping device including the stamping oil coating machine, the stamping oil can be supplied to the injector at a constant flow rate and flow rate, and the stamping oil impregnation concentration of the coating roller can be kept constant by forming the injection hole of the injector to be the same as the width direction of the coating roller. Therefore, the concentration of the stamping oil on the non-coating part can be uniformly maintained.

[0150] Furthermore, by coating the first and second non-coating portions located on mutually symmetrical surfaces of the electrode plate with the punching oil, the coating efficiency can be improved.

[0151] Furthermore, by automatically adjusting or selecting the contact between the coating roller and the non-coating portion according to the movement and stop state of the electrode plate, the non-coating portion that has stopped can be prevented from being over-coated with the stamping oil.

[0152] Therefore, the efficiency of the stamping oil coating process of the non-coating portion can be improved, and the coating uniformity can be improved.

[0153] One or more embodiments may provide a stamping oil coating machine that may selectively contact an electrode plate and selectively coat the electrode plate with stamping oil while rotating, and may help increase the uniformity of stamping oil coating by uniformly controlling the flow rate and flow rate of the stamping oil.

[0154] One or more embodiments may provide a stamping oil coating machine for coating stamping oil on a non-coating portion of an electrode of a secondary battery.

[0155] Although the present disclosure has been described above with respect to the embodiments of the present disclosure, the present disclosure is not limited thereto. Various modifications and changes may be made to it by those skilled in the art within the spirit of the present disclosure and the equivalent scope of the appended claims.

[0156] Example embodiments have been disclosed herein, and although specific terms are employed, they are used and are to be interpreted in a general and descriptive sense only and not for purposes of limitation. In some cases, as will be apparent to one of ordinary skill in the art when filing this application, unless otherwise specifically stated, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention as set forth in the appended claims.

Claims

1. A stamping oil coating machine, comprising: A coating device, configured to: corresponding to feed rollers, which contact the electrode plate and move the electrode plate and are located at different positions from each other, and rotating to contact a pair of non-coated portions of mutually symmetrical surfaces of the electrode plate and coating the pair of non-coated portions with stamping oil, when the feed roller presses the pair of non-coated portions against the coating device and moves the electrode plate; an injector configured to inject the stamping oil onto the coating device; a stamping oil supply device configured to uniformly control the flow rate and flow rate of the stamping oil supplied to the injector; and A coating controller is configured to control a stamping oil coating operation for the electrode plate.

2. The stamping oil coating machine according to claim 1, wherein: The coating device comprises: At least one first coating device located at a first position is configured to: at least one first feed roller corresponding to the second surface contacting the electrode plate, and coating at least one first non-coating portion on a peripheral portion of the first surface opposite to the second surface; and at least one second coating device, located at a second position separated from the first position in the conveying direction of the electrode plate, and configured to: at least one second feed roller corresponding to the first surface contacting the electrode plate, and At least one second non-coating portion is coated on a peripheral portion of the second surface symmetrical to the first non-coating portion on the first surface.

3. The stamping oil coating machine according to claim 1, wherein: The coating device comprises: a support rod extending in a first direction as a width direction of the electrode plate and separated from the electrode plate in a second direction perpendicular to the first direction; a coating roller rotatably coupled to the support rod, the support rod passing through a central portion of the coating roller, the coating roller having a surface in which the stamping oil is impregnated; and A contact driver is coupled to the end of the support rod and is configured to drive the support rod to cause the coating roller to selectively contact at least one of the non-coated portions, wherein the coating roller coats at least one of the non-coated portions with the stamping oil by rotationally contacting at least one of the non-coated portions.

4. The stamping oil coating machine according to claim 3, wherein: The coating roller comprises: a rotating roller coupled to the support rod through a bearing and configured to rotate the support rod around a rotation axis; and A porous coating member surrounds the surface of the rotating roller and is impregnated with the punching oil.

5. The stamping oil coating machine according to claim 3, wherein: The contact driver comprises: a driving rod extending in a third direction perpendicular to the first direction and the second direction and fixed to the supporting rod; a drive base rotatably coupled to the drive rod; and A rod rotator is configured to drive the driving rod to reciprocate around the first direction so that the coating roller selectively contacts at least one of the non-coating portions.

6. The stamping oil coating machine according to claim 5, wherein: The rod rotator comprises: a drive rod rotation shaft coupled to the drive base and coupled to the drive rod; a rotation drive device configured to rotate the drive rod rotation axis; and A detector connected to the coating controller to detect a conveying state related to the movement and stop of the electrode plate and transmit the conveying state to the rotation drive device, and the rod rotator is configured to rotate the drive rod so that the coating roller contacts at least one of the non-coating parts when the electrode plate moves, and is configured to rotate the drive rod to separate the coating roller from at least one of the non-coating parts when the electrode plate stops.

7. The stamping oil coating machine according to claim 6, wherein: The rod rotator includes a servo motor configured to rotate the drive rod according to a pulse width modulated signal.

8. The stamping oil coating machine according to claim 6, wherein: The driving rod rotation shaft includes a cam structure configured to cause the driving rod to reciprocate and rotate within a set range.

9. The stamping oil coating machine according to claim 3, wherein: The injector is located above the coating roller so that the stamping oil is injected downward by gravity.

10. The stamping oil coating machine according to claim 9, wherein: The injector comprises: an injection waiting space for storing the stamping oil supplied from the stamping oil supply device; and The spraying portion is in fluid communication with the spray waiting space and is configured to uniformly supply the stamping oil to the coating roller.

11. The stamping oil coating machine according to claim 10, wherein: The ejection portion includes a single groove having a length corresponding to a width of the coating roller.

12. The stamping oil coating machine according to claim 10, wherein: The spraying portion includes a plurality of nozzles arranged at even intervals along a width of the coating roller.

13. The stamping oil coating machine according to claim 1, wherein: The stamping oil supply device comprises an injection pump.

14. The stamping oil coating machine according to claim 1, wherein: The stamping oil supply device comprises: A cylinder having a storage space, wherein the stamping oil can be stored in the storage space; a piston located in the cylinder to seal the storage space from the outside and configured to discharge or introduce the punching oil by adjusting the volume of the storage space through linear reciprocating motion; and A piston driver is configured to control the linear reciprocating motion of the piston so as to discharge the ram oil from the cylinder at a uniform flow rate and flow rate.

15. The stamping oil coating machine according to claim 14, wherein: The punching oil supply device further includes a flow controller configured to set the operating unit to maintain the uniform flow rate and flow rate.

16. The stamping oil coating machine according to claim 15, wherein: The flow controller includes a user interface for inputting the flow rate and flow rate of the punching oil and the volume of the punching oil stored in the storage space of the cylinder, and The flow controller is configured to control the piston driver so that the punching oil is discharged while keeping the flow rate and flow rate input through the user interface constant during the movement of the electrode plate, and to stop the piston driver when the electrode plate stops.

17. The stamping oil coating machine according to claim 14, wherein: The piston driver includes a stepper motor configured to adjust a unit rotation pitch according to the flow rate and flow rate.

18. A stamping device for manufacturing a secondary battery, the stamping device comprising: Feed rollers, configured to: a contact electrode plate having a surface including a coating portion coated with an electrode active material and a pair of non-coating portions not coated with the electrode active material, and conveying the electrode plate by rotation; a stamping oil coating machine configured to coat the pair of non-coating portions of the mutually symmetrical surfaces of the electrode plate together with the stamping oil; a die having an opening corresponding to a set punching shape and supporting the electrode plate coated with the punching oil; as well as a press configured to punch the pair of non-coating portions corresponding to the punching shape to form an electrode tab connected to the coating portion, The stamping oil coating machine comprises: A coating device, configured to: corresponding to the feed rollers, the feed rollers contact the electrode plate and move the electrode plate and are located at different positions from each other, and rotating to contact the pair of non-coated portions of the mutually symmetrical surfaces of the electrode plate and coating the pair of non-coated portions with the stamping oil, when the feed roller presses the pair of non-coated portions against the coating device and moves the electrode plate; an injector configured to inject the stamping oil onto the coating device; a stamping oil supply device configured to uniformly control the flow rate and flow rate of the stamping oil supplied to the injector; and A coating controller is configured to control a stamping oil coating operation for the electrode plate.

19. The punching device according to claim 18, wherein The press includes a protruding punch end that is inserted into the opening to correspond to the punching shape, The protruding punch end is inserted into the opening to separate a portion of the pair of non-coated portions corresponding to the punched hole shape as waste, and The electrode tab includes a portion of the pair of non-coating portions that remains connected to the coating portion.

20. The stamping apparatus of claim 19, further comprising a loading track configured to collect the waste material.

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