Electrode cutting device for all-solid-state battery

Abstract

The present invention relates to an electrode cutting device for an all-solid-state battery, the electrode cutting device for an all-solid-state battery comprising: an upper cutting unit comprising an upper knife holder and an upper knife; an upper knife adjustment unit adjacent to one side surface of the upper knife; a lower knife; and a stripper for fixing an electrode, wherein the stripper is adjacent to the other side surface of the upper knife and is located on the upper surface of the lower knife, the stripper includes a main body part and a protrusion part protruding downward from the main body part to contact the electrode, and the minimum width of the protrusion part relative to the width of the main body part is 0.1 to 0.5.

Description

Electrode cutting device for all-solid-state batteries

[0001] The present invention relates to an electrode cutting device, and more particularly, to an electrode cutting device for an all-solid-state battery including a topcoat and a stripper capable of preventing detachment during shearing of a brittle material.

[0002]

[0003] Recent industrial demands have led to the active development of batteries with high energy density and safety. For example, lithium-ion batteries are being used not only in information and communication devices, but also in the automotive sector. Safety is particularly important in the automotive sector, as it is directly related to life.

[0004] Recently, all-solid-state batteries, which replace the electrolyte with a solid electrolyte, have been proposed. By eliminating the use of flammable organic dispersion media, all-solid-state batteries significantly reduce the risk of fire or explosion in the event of a short circuit. Therefore, these all-solid-state batteries can significantly improve safety compared to lithium-ion batteries that use electrolytes.

[0005]

[0006] The problem to be solved by the present invention is to provide an electrode cutting device for an all-solid-state battery that prevents detachment during cutting of an electrode having high tensile strength and strong brittleness.

[0007] Another problem to be solved by the present invention is to provide an electrode cutting device for an all-solid-state battery that increases the clearance between the upper and lower layers by adjusting the upper layer through incomplete bonding of the upper layer holder and the upper layer and lateral pressure.

[0008]

[0009] According to the concept of the present invention, an electrode cutting device for an all-solid-state battery comprises: an upper cutting portion including a top coat holder and a top coat; a top coat adjusting portion adjacent to one side of the top coat; a lower coat; and a stripper configured to fix an electrode, wherein the stripper is adjacent to the other side of the top coat and is positioned on an upper surface of the lower coat, and the stripper includes a main body and a protrusion that protrudes downward from the main body and comes into contact with the electrode, and a minimum width of the protrusion relative to the width of the main body may be 0.1 to 0.5.

[0010] According to another concept of the present invention, an electrode cutting device for an all-solid-state battery comprises: an upper cutting portion including a top coat holder and a top coat; a top coat adjusting portion adjacent to a side of the top coat; a lower coat; and a stripper configured to fix the electrode, wherein the stripper is adjacent to the other side of the top coat and is positioned on an upper surface of the lower coat, the stripper includes a protrusion that contacts the electrode, the protrusion includes a first surface contacting the electrode and a second surface adjacent to the top coat, and a contact angle formed by the first surface and the second surface of the protrusion may be less than 90°.

[0011] The present invention can reduce detachment during electrode cutting by making the main body width and the protrusion width of a stripper of an electrode cutting device for an all-solid-state battery different.

[0012] The electrode cutting device for an all-solid-state battery according to the present invention can increase the clearance between the upper and lower layers by incomplete bonding of the upper layer holder and the upper layer.

[0013]

[0014] Figure 1 is a drawing showing a fastening state of an electrode cutting device for an all-solid-state battery according to embodiments of the present invention.

[0015] FIG. 2 is a drawing showing a fastening state of an electrode cutting device including a stripper according to embodiments of the present invention.

[0016] FIG. 3 is a perspective view showing a top view according to embodiments of the present invention.

[0017] FIG. 4 is a perspective view showing a stripper according to embodiments of the present invention.

[0018] FIG. 5a and FIG. 5b are conceptual diagrams showing the fastening positions of strippers according to embodiments of the present invention.

[0019] Figures 6 and 7 are side views of a stripper according to embodiments of the present invention.

[0020] FIGS. 8 to 10 are side views showing the contact angle of a stripper according to embodiments of the present invention.

[0021] Fig. 11 is an enlarged view of a bend portion of a stripper according to embodiments of the present invention.

[0022] FIGS. 12 and 13 are side views of a stripper according to another embodiment of the present invention.

[0023] Figures 14a to 14d are conceptual diagrams showing a cutting process of an electrode cutting device according to embodiments of the present invention.

[0024] Figures 15 and 16 are conceptual diagrams briefly illustrating an electrode cutting process of an electrode cutting device according to embodiments of the present invention.

[0025]

[0026] To fully understand the structure and effects of the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms and subject to various modifications. However, the description of these embodiments is provided solely to ensure a complete disclosure of the present invention and to fully inform those skilled in the art of the invention of the scope of the invention.

[0027] In this specification, when a component is referred to as being on another component, it means that it can be formed directly on the other component, or a third component may be interposed between them. Furthermore, in the drawings, the thicknesses of the components are exaggerated for the sake of clarity. Parts designated by the same reference numerals throughout the specification represent the same components.

[0028] Unless otherwise specified herein, the singular may also include the plural. Furthermore, unless otherwise specified, "A or B" may mean "including A, including B, or including A and B." As used herein, "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components.

[0029] As used herein, “combination thereof” may mean mixtures, laminates, composites, copolymers, alloys, blends, and reaction products of the components.

[0030]

[0031] FIG. 1 is a drawing showing a connection state of an electrode cutting device for an all-solid-state battery according to embodiments of the present invention. Referring to FIG. 1, the electrode cutting device may include an upper cutting part (UKP), a top coat adjusting part (UKAP), and a lower coat (LK). The top coat adjusting part (UKAP) may be coupled to the upper cutting part (UKP) or may be positioned separately. The upper cutting part (UKP) may include a top coat holder (UKH) and a top coat (UK). The top coat holder (UKH) and the top coat (UK) may be integrally coupled. The top coat holder (UKH) and the top coat (UK) may be incompletely coupled. The top coat holder (UKH) coupled to the top coat (UK) may be driven up and down.

[0032] An electrode supply unit (ES), which will be described later in Fig. 15, may be positioned on the side of the lower part (LK). The electrode supply unit (ES) serves to continuously supply electrodes. The electrode (EP) supplied from the electrode supply unit (ES) can be cut at regular intervals by the upper cutting unit (UKP) that moves up and down and the fixed lower part (LK).

[0033] The UK blade, which serves as a knife for delivering electrodes, can be positioned at the top of the electrode cutting device. The UK blade can be moved up and down to contact the LK blade. The UK blade can be moved up and down along a guide. The UK blade can move up and down to cooperate with the LK blade to cut the electrode.

[0034] The topcoat (UK) can be coupled to the topcoat holder (UKH). The topcoat holder (UKH) and the topcoat (UK) can be imperfectly coupled. The imperfect coupling means that the topcoat holder (UKH) and the topcoat (UK) are not completely tightly coupled. The incomplete coupling may be a state in which the bolts coupling the topcoat holder (UKH) and the topcoat (UK) are not completely tightened. For example, the incomplete coupling may be a state in which the bolts coupling the topcoat holder (UKH) and the topcoat (UK) are loosened once or twice in the opposite direction of the tightening direction from the state in which they are fully tightened. The topcoat holder (UKH) and the topcoat (UK) can be coupled with bolts, and a protruding portion attached to the topcoat holder (UKH) can be coupled by contacting a hole formed in the topcoat (UK).

[0035] As the top coat holder (UKH) and the top coat (UK) are incompletely joined, the top coat (UK) can be adjusted vertically with respect to the bottom coat (LK) by the top coat adjusting unit (UKAP). The top coat adjusting unit (UKAP) can apply lateral pressure to the side of the top coat (UK) to increase the clearance between the top coat (UK) and the bottom coat (LK). Clearance represents the adhesion between the top coat (UK) and the bottom coat (LK).

[0036] The UK blade can be shaped so that the width on both sides of the lower blade portion is large and the blade narrows toward the center in the longitudinal direction. In other words, the lower blade portion of the UK can form a blade that slopes upward toward the center in the longitudinal direction of the UK. The reason for configuring it in this way may be to increase the shear angle of the part (both sides) that first comes into contact with the electrode during electrode cutting. Increasing the shear angle facilitates pressure distribution on both sides of the blade portion, which can prevent the electrode from being torn or damaged.

[0037] The lower blade (LK) is a knife that engages with the upper blade (UK) to cut the electrode and can be located at the bottom of the electrode cutting device. Unlike the upper blade (UK) that moves up and down along a guide, the lower blade (LK) can be fixed in place. Unlike the upper blade (UK), the lower blade (LK) may not be equipped with a separate lower blade holder, but this is not necessarily limited to this, and a device for fixing the lower blade (LK), such as a lower frame, can be added.

[0038] The UKH can serve to fix the UK and support the UK cutting part (UKP) so that it can slide up and down. The UKH can fix the UK while moving it up and down along a guide. The UKH can be positioned above the UK and can be larger than the UK.

[0039] The UKAP may include a UKA and a cylinder (CD). The UKAP may be positioned on the side of the UK. The lower line (LK) may be positioned on one side of the UK, and the UKA may be positioned on the other side.

[0040] The UKA can fine-tune the clearance and perpendicularity of the UK to the lower coat (LK) within tolerance. The clearance between the UK and the lower coat can be a factor affecting electrode quality. The UKA can apply lateral pressure to the side of the UK to align the UK with the lower coat (LK). The applied lateral pressure aligns the UK perpendicular to the lower coat (LK), increasing the clearance and thus increasing the electrode cutting force, which can ultimately improve electrode quality.

[0041]

[0042] Fig. 2 is a drawing showing a fastening state of an electrode cutting device including a stripper (STP) according to embodiments of the present invention. Referring to Fig. 2, the stripper (STP) can be arranged on the lower side of the top plate holder (UKH). The stripper (STP) prevents the electrode material from easily falling off the top plate (UK) and rising upward when the top plate (UK) moves upward after cutting the electrode material. That is, the stripper (STP) is provided so as to be elastically slidable by a guide that extends and is installed from the top plate holder (UKH). This controls the electrode material to be pressed by elastic force so that it does not rise upward when the top plate holder (UKH) is raised and lowered by a conventional driving means such as a conventional hydraulic or pneumatic cylinder.

[0043] Referring to FIG. 2, the stripper (STP) may not be in close contact with the top coat (UK). To adjust this, the top coat adjuster (UKA) of FIG. 1 may apply lateral pressure. The lateral pressure applied by the top coat adjuster (UKA) to the top coat (UK) or the top coat holder (UKH) may be in the range of 0.05 MPa to 1 MPa, 0.05 MPa to 0.5 MPa, or 0.1 MPa to 0.5 MPa.

[0044]

[0045] FIG. 3 is a perspective view of a top view according to embodiments of the present invention. Referring to FIG. 3, the top view (UK) may include a coupling portion (CP) that couples the top view (UK) and a top view holder (UKH). The coupling portion (CP) may include a first coupling hole (CH1) and a second coupling hole (CH2).

[0046] The first coupling hole (CH1) can be joined by bolting the UK and the UKH holder. When the first coupling hole (CH1) is bolted, a state in which the bolt is completely fastened can be considered a complete coupling. On the other hand, a state in which the bolt is not fully fastened and is somewhat loosened from the fully fastened state can be considered an incomplete coupling.

[0047] The second coupling hole (CH2) can serve as a guide to facilitate replacement of the top plate (UK) and to fix the top plate (UK) in the vertical direction. The second coupling hole (CH2) can be a portion where a protrusion (PJP) located on the top plate holder (UKH) is coupled.

[0048] The upper part (UK) can be coupled to the upper part holder (UKH) by the first coupling hole (CH1) and the second coupling hole (CH2). In the case of complete coupling, the first coupling hole (CH1) and the second coupling hole (CH2) can be completely and tightly coupled by the bolt and the protruding part, respectively. On the other hand, in the case of incomplete coupling, the second coupling hole (CH2) can be tightly coupled, but the first coupling hole (CH1) may not be tightly coupled. In addition, in the case of incomplete coupling, not only the first coupling hole (CH1) but also the second coupling hole (CH2) may not be tightly coupled.

[0049] Referring to FIG. 3, the upper part (UK) may include a first coupling hole (CH1) and a second coupling hole (CH2). The first coupling hole (CH1) may be a hole formed at the upper part of the upper part (UK) and may be a hole fastened with a bolt. The first coupling hole (CH1) may include 2 to 6 holes. The first coupling hole (CH1) may be fastened in a tab-through or hole-through manner depending on the direction in which the bolt is fastened.

[0050]

[0051] FIG. 4 is a perspective view of a stripper (STP) according to embodiments of the present invention. Referring to FIG. 4, the stripper (STP) may serve to fix an electrode. When cutting an electrode with an electrode cutting device, the stripper (STP) may serve to fix an electrode before the upper layer (UK) and the lower layer (LK) intersect and cut the electrode. That is, the stripper (STP) may serve to fix an electrode before the upper layer (UK) and the lower layer (LK) intersect for shearing. The stripper (STP) may serve to reduce the phenomenon of the electrode plate lifting or the phenomenon of the electrode plate bending when cutting an electrode with an electrode cutting device. This may improve the shearing quality of the electrode cutting device. An electrode cutting device in a sheet unit may not include a stripper (STP). On the other hand, an electrode cutting device in a roll-to-roll device may include a stripper (STP).

[0052] The stripper (STP) may be adjacent to the other side of the UK. Furthermore, the stripper (STP) may be located in the upper region of the lower channel (LK). The other side of the UK may refer to a direction opposite to the third direction (D3) with reference to FIG. 3.

[0053] The stripper (STP) may include a body portion (BDP) and a projection portion (PJP). The body portion (BDP) may be the body portion of the stripper (STP). Additionally, the body portion (BDP) may be a majority area of ​​the stripper (STP). The body portion (BDP) may be adjacent to the other side of the UK.

[0054] The protrusion (PJP) may be a portion protruding downward from the main body (BDP) of the stripper (STP). In addition, the protrusion (PJP) may be a portion where the stripper (STP) and the electrode come into contact. The protrusion (PJP) may be the lowest portion of the stripper (STP). The protrusion (PJP) may be located in a portion of the lower region of the stripper (STP) that comes into contact with the upper surface (UK). The lower region of the stripper (STP) may be a region located in a direction opposite to the first direction (D1) when referring to FIG. 4.

[0055]

[0056] FIGS. 5A and 5B are conceptual diagrams illustrating fastening positions of a stripper (STP) according to embodiments of the present invention. Referring to FIG. 5A, the stripper (STP) may be located on the other side of the top coat (UK). Referring to FIG. 5A, the stripper (STP) may be located on the upper side of the bottom coat (LK). The stripper (STP) may be located on the upper side of the bottom coat (LK) in the first direction (D1). In addition, the stripper (STP) may be located on the other side of the top coat (UK). The top coat may be located in the third direction (D3) with respect to the stripper (STP). That is, the other side of the top coat (UK) may be located in the direction opposite to the third direction (D3). In addition, the stripper (STP) may be located on the lower side of the top coat holder (UKH) as illustrated in FIG. 2. That is, the stripper (STP) can be positioned in the direction opposite to the first direction (D1) with respect to the surface holder (UKH).

[0057] Referring to FIG. 5b, the stripper (STP) may be positioned below the joining portion (CP) of the top coat (UK). That is, the stripper (STP) may be adjacent to a region positioned in a direction opposite to the first direction (D1) with respect to the first joining hole (CH1) and the second joining hole (CH2) of the top coat (UK). This may be because the first joining hole (CH1) and the second joining hole (CH2) are portions where the top coat (UK) and the top coat holder (UKH) are joined, and the stripper (STP) may be positioned below the top coat holder (UKH).

[0058]

[0059] Figures 6 and 7 are side views of a stripper (STP) according to embodiments of the present invention. Referring to Figure 6, the protrusion (PJP) of the stripper (STP) may be in a protruding shape in a protruding direction (PJD). The protruding direction (PJD) may be opposite to the first direction (D1). The protruding direction (PJD) may be the same as the direction in which the protrusion (PJP) protrudes.

[0060] The protrusion (PJP) may include a curved portion (CVP) located on the other side adjacent to the UK. The curved portion (CVP) may be a portion of an edge of the protrusion (PJP). The protrusion (PJP) may be located at a point where the protrusion (PJP) and the UK meet.

[0061] The curved portion (CVP) may have a curved edge. The CVP may serve to prevent damage to the stripper blade (STP) when the stripper blade is moved up and down, as it contacts the surface. The CVP may be a portion of the protrusion (PJP) ground into a curved surface.

[0062] Referring to Fig. 6, the cross-section of the protrusion (PJP) may have a trapezoidal shape. In addition, the cross-section of the protrusion (PJP) may have a rectangular or square shape. The shape of the protrusion (PJP) may have a width (PJPWD) of the protrusion, which will be described later, that is smaller than the width (BDPWD) of the main body.

[0063]

[0064] FIG. 7 is a side view of a stripper (STP) according to embodiments of the present invention. Referring to FIG. 7, a main body (BDP) of the stripper (STP) may include a width (BDPWD) of the main body. In addition, a protrusion (PJP) of the stripper (STP) may include a width (PJPWD) of the protrusion, a protrusion length (PJPLG), and a bend (CVP). The width (PJPWD) of the protrusion may include a maximum width (PMXWD) of the protrusion and a minimum width (PMNWD) of the protrusion.

[0065] The width (BDPWD) of the main body may be the length of the stripper (STP) in the third direction (D3) with reference to FIG. 7. In addition, the width (BDPWD) of the main body may also mean the thickness of the stripper (STP). The width (BDPWD) of the main body may be in the range of 5 mm to 20 mm, 5 mm to 20 mm, or 10 mm to 20 mm. If the width (BDPWD) of the main body is smaller than the minimum length of the above range, the thickness of the stripper (STP) may be formed too thin. If the thickness of the stripper (STP) is formed thin, the durability of the stripper (STP) may be reduced and it may not be able to function as a stripper (STP). In addition, if the width (BDPWD) of the main body is too small and the thickness of the stripper (STP) is formed thin, the contact area between the electrode plate and the stripper (STP) may be reduced. If the contact area between the electrode plate and the stripper (STP) is reduced, the reduced area of ​​the stripper (STP) can cause secondary shearing. Secondary shearing may refer to shearing caused by contact between the stripper (STP) and the undercoat, rather than electrode breakage resulting from the intersection of the UK and LK. Furthermore, a reduced area of ​​the stripper (STP) can cause unnecessary marks to form on the electrode plate, potentially degrading its quality.

[0066] The protrusion length (PJPLG) may be a length indicating the extent to which the protrusion (PJP) protrudes in the protrusion direction (PJD). The protrusion length (PJPLG) may mean a length that protrudes in a direction opposite to the first direction (D1) of the protrusion (PJP). The direction of the protrusion length (PJPLG) may be parallel to the first direction (D1). In addition, the direction of the protrusion length (PJPLG) may be parallel to a normal line of a plane formed by the second direction (D2) and the third direction (D3). The protrusion length (PJPLG) may be a measure indicating the extent to which the protrusion (PJP) of the stripper (STP) protrudes. The longer the protrusion length (PJPLG), the greater the protrusion degree of the protrusion (PJP). In addition, the larger the protrusion length (PJPLG), the greater the area of ​​the portion occupied by the protrusion (PJP) among the entire area of ​​the cross-section of the stripper (STP). In addition, as the protrusion length (PJPLG) becomes smaller, the area of ​​the body part (BDP) among the entire area of ​​the cross-section of the stripper (STP) may decrease. The protrusion length (PJPLG) cannot exceed half of the entire length of the stripper (STP). In addition, the protrusion length (PJPLG) may be smaller than 15 mm. The protrusion length (PJPLG) of the protrusion part (PJP) may be in the range of 1 mm to 10 mm, 3 mm to 8 mm, or 3 mm to 5 mm. As the protrusion length (PJPLG) becomes larger, the thickness of the stripper (STP) may gradually decrease.

[0067] The width (PJPWD) of the protrusion may be the thickness of a portion of the thickness of the stripper (STP) occupied by the protrusion (PJP). Referring to FIG. 7, the width (PJPWD) of the protrusion may be the length of a portion parallel to the third direction (D3). As the width (PJPWD) of the protrusion increases, the thickness of the protrusion (PJP) may gradually increase in the thickness of the stripper (STP). The width (PJPWD) of the protrusion may gradually decrease in the protrusion direction (PJD). Therefore, the width (PJPWD) of the protrusion may include the minimum width (PMNWD) of the protrusion and the maximum width (PMXWD) of the protrusion.

[0068] The minimum width of the protrusion (PMNWD) may refer to the smallest width among the widths of the protrusion (PJPWD). The minimum width of the protrusion (PMNWD) may refer to the width of the most protruding part among the protrusions (PJP). In addition, the minimum width of the protrusion (PMNWD) may be the width of the part located at the end in the protrusion direction (PJD) when the protrusion length (PJPLG) is at its maximum.

[0069] The minimum width of the protrusion (PMNWD) may be 3 mm or more. Additionally, the minimum width of the protrusion (PMNWD) may be 5 mm or more. As the minimum width of the protrusion (PMNWD) becomes smaller, the area where the stripper (STP) comes into contact with the plate may decrease. Therefore, if the minimum width of the protrusion (PMNWD) is less than 3 mm, the area of ​​the stripper (STP) coming into contact with the plate may decrease, which may cause secondary shearing.

[0070] The maximum width of the protrusion (PMXWD) may refer to the largest width among the widths of the protrusion (PJPWD). The maximum width of the protrusion (PMXWD) may refer to the width of the innermost part in the direction opposite to the protrusion direction (PJD) of the protrusion (PJP). In addition, the maximum width of the protrusion (PMXWD) may be the width of the part located most in the protrusion direction (PJD) when the protrusion length (PJPLG) is minimum. The maximum width of the protrusion (PMXWD) may be the width of the part where the main body (BDP) of the stripper (STP) and the protrusion (PJP) come into contact.

[0071] The maximum width (PMXWD) of the protrusion may be equal to the width (BDPWD) of the body. In addition, the maximum width (PMXWD) of the protrusion may be equal to or less than the width (BDPWD) of the body. Accordingly, the maximum width (PMXWD) of the protrusion may be in the range of 5 mm to 20 mm, 5 mm to 20 mm, or 10 mm to 20 mm.

[0072] The width of the protrusion (PJPWD) relative to the width of the main body (BDPWD) may be 0.1 to 0.5. In addition, the maximum width of the protrusion (PMXWD) relative to the width of the main body (BDPWD) may be 0.1 to 0.5. In addition, the minimum width of the protrusion (PMNWD) relative to the width of the main body (BDPWD) may be 0.1 to 0.5.

[0073] If the minimum width of the protrusion (PMNWD) compared to the width of the body (BDPWD) is less than 0.1, the minimum width of the protrusion (PMNWD) may be too small and may apply secondary shear to the electrode. In addition, if the minimum width of the protrusion (PMNWD) compared to the width of the body (BDPWD) is greater than 0.5, the contact area between the protrusion (PJP) of the stripper (STP) and the electrode may increase, thereby increasing the area where unnecessary pressure is applied when cutting the electrode.

[0074]

[0075] Figures 8 to 10 are side views illustrating the contact angle (CTA) of a stripper (STP) according to embodiments of the present invention. Referring to Figure 8, the stripper (STP) may include a first surface (SD1) that contacts an electrode. In addition, the stripper (STP) may include a second surface (SD2) adjacent to the other side of the surface. The first surface (SD1) and the second surface (SD2) may not be located on the same plane.

[0076] The second side (SD2) may be adjacent to the upper surface (UK). In one embodiment, the second side (SD2) may not be in contact with the upper surface (UK) (see FIG. 9). When the second side (SD2) is adjacent to the upper surface (UK), the second side (SD2) may be parallel to the first direction (D1). Furthermore, when the second side (SD2) is adjacent to the upper surface (UK), the first side (SD1) and the second side (SD2) may be orthogonal to each other.

[0077]

[0078] FIG. 9 is a side view of a stripper (STP) according to another embodiment of the present invention. Referring to FIG. 9, the stripper (STP) may include a protrusion (PJP). In addition, the protrusion (PJP) may include a first surface (SD1) that contacts an electrode and a first surface (SD1) adjacent to a topcoat (UK). The first surface (SD1) and the second surface (SD2) may be perpendicular to each other, or may be in contact with each other in a form in which the second surface (SD2) is inclined at a certain angle. The contact angle (CTA) may refer to an angle indicating the degree to which the second surface (SD2) is inclined in the third direction (D3) at the point where the first surface (SD1) and the second surface (SD2) contact each other. In the case where the first surface (SD1) and the second surface (SD2) are perpendicular to each other as in FIG. 8, the contact angle (CTA) may be 90°.

[0079] Referring back to FIG. 9, the contact angle (CTA), which is the angle formed by the first surface (SD1) and the second surface (SD2), may be less than 90°. The contact angle (CTA) according to the present embodiment may be an acute angle. If the contact angle (CTA) is less than 90°, the stripper (STP) may not be positioned in close contact with the top surface. If the contact angle (CTA) is less than 90°, the stripper (STP) may not be positioned away from the top surface. If the stripper (STP) is positioned away from the top surface, when the top surface is driven up and down to intersect the bottom surface, the frictional force between the other side of the stripper (STP) and the top surface may be reduced. If the frictional force at the part where the top surface and the stripper (STP) come into contact is reduced, damage to the stripper (STP) may be reduced. That is, if the first side (SD1) and the second side (SD2) of the stripper (STP) are not orthogonal and the contact angle (CTA) is less than 90°, the replacement frequency of the stripper (STP) can be reduced.

[0080] When the contact angle (CTA) between the first surface (SD1) and the second surface (SD2) of the stripper (STP) is less than 90°, an air layer may be formed between the top coat (UK) and the stripper (STP) when the top coat (UK) moves up and down. The air layer formed between the top coat (UK) and the stripper (STP) can reduce friction between the top coat (UK) and the stripper (STP), thereby reducing wear occurring in the top coat (UK) and the stripper (STP). The air layer formed between the top coat (UK) and the stripper (STP) can reduce the replacement frequency of the top coat (UK) or the stripper (STP).

[0081] If the contact angle (CTA) between the first side (SD1) and the second side (SD2) of the stripper (STP) is less than 90°, the top coat (UK) and the stripper (STP) may not be in close contact. If the top coat (UK) and the stripper (STP) are not in close contact, the clearance between the top coat (UK) and the bottom coat (LK) may increase due to the lateral pressure applied to the top coat (UK) by the top coat adjuster (UKA). In addition, if the top coat (UK) and the stripper (STP) are not in close contact, the stripping force may increase due to the lateral pressure applied to the top coat (UK) by the top coat adjuster (UKA). If the stripping force between the stripper (STP) and the top coat (UK) is increased, the risk of foreign material transfer during electrode cutting can be suppressed. Additionally, the increased stripping force between the stripper (STP) and the topcoat (UK) can reduce the phenomenon of the electrode plates lifting during electrode shearing.

[0082]

[0083] Fig. 10 is a side view of a stripper (STP) according to an embodiment of the present invention. Fig. 11 is an enlarged view of a bend portion (CVP) of a stripper (STP) according to embodiments of the present invention.

[0084] Referring to FIGS. 10 and 11, the stripper (STP) may include a protrusion (PJP), a second surface (SD2) positioned in a third direction (D3) of the protrusion (PJP), a first surface (SD1) positioned in a direction opposite to the first direction (D1) of the protrusion (PJP), and a bend (CVP).

[0085] The bend portion (CVP) may be a portion of a corner of the protrusion (PJP). In addition, the bend portion (CVP) may be located in an area where the first surface (SD1) and the second surface (SD2) contact each other. The bend portion (CVP) may be formed by cutting a portion of a portion where the first surface (SD1) and the second surface (SD2) contact each other. The bend portion (CVP) may have a curved corner shape. The bend portion (CVP) may prevent secondary shearing of the electrode when the stripper (STP) and the electrode come into contact before the upper coat (UK) and the lower coat (LK) intersect and cut the electrode. In addition, the bend portion (CVP) may reduce friction between the upper coat (UK) and the stripper (STP) when the stripper (STP) and the upper coat (UK) come into contact and move up and down.

[0086]

[0087] Figures 12 and 13 are side views of a stripper (STP) according to another embodiment of the present invention. Referring to Figure 12, the protrusion (PJP) may be in a form that protrudes in the protrusion direction (PJD) as described above.

[0088] Referring to FIG. 13, a stripper (STP) according to another embodiment of the present invention may include a width (BDPWD) of a main body, a width (PJPWD) of a protrusion, a protrusion length (PJPLG), and a bend (CVP). As described above, the bend (CVP) may prevent the blade of the top coat (UK) from being damaged when the stripper (STP) and the top coat (UK) are in contact and driven up and down. In addition, the width (BDPWD) of the main body, the width (PJPWD) of the protrusion, and the protrusion length (PJPLG) may also be as described above.

[0089]

[0090] Figures 14a to 14d are conceptual diagrams showing a cutting process of an electrode cutting device according to embodiments of the present invention.

[0091] Referring to Fig. 14a, a stripper (STP) may be positioned above a first direction (D1) with respect to a lower part (LK). In addition, a top part (UK) may be positioned in a third direction (D3) with respect to the stripper (STP). The stripper (STP) and the top part (UK) may descend in a direction opposite to the first direction (D1) in which the bottom part (LK) is positioned. At this time, the lowermost part of the stripper (STP) may be positioned lower than the lowermost part of the top part (UK). In other words, the stripper (STP) may be in a form that protrudes more than the top part (UK) with respect to the lower part. The lower part may be a part positioned in a direction opposite to the first direction (D1).

[0092] Referring to Fig. 14b, the top coat (UK) coupled with the stripper (STP) may descend and come into contact with the bottom coat (LK). At this time, the stripper (STP) may come into contact with the bottom coat (LK) before the top coat (UK). This may be because, as described above, the stripper (STP) has a shape in which the lower surface protrudes more than the top coat (UK). That is, when the top coat (UK) and the stripper (STP) descend to cut the electrode, the stripper (STP) may come into contact with the electrode first. This may be because the stripper (STP) serves to fix the top coat (UK) and the bottom coat (LK) before they engage for electrode cutting. In addition, the stripper (STP) may come into contact with the electrode before the top coat (UK) to reduce the phenomenon of the electrode plate being lifted when cutting the electrode.

[0093] Figure 14c is a conceptual diagram illustrating a state in which an electrode is cut by a top-cutting tool (UK) after it has been fixed by a stripper (STP). Referring to Figure 14c, an electrode fixed by a stripper (STP) and a bottom-cutting tool (LK) can be cut by the top-cutting tool (UK) being lowered. The top-cutting tool (UK) can cut the electrode by intersecting with the bottom-cutting tool (LK).

[0094] Figure 14d is a conceptual diagram illustrating the rise of the UK and the stripper (STP) after electrode severing. After electrode severing, the UK may rise before the stripper (STP). That is, after electrode severing, the UK may rise before the stripper (STP) gradually increases. This may be to reduce the phenomenon of the stripper (STP) lifting or bending of the electrode plate after electrode severing.

[0095]

[0096] FIGS. 15 and 16 are conceptual diagrams briefly illustrating an electrode cutting process of an electrode cutting device according to embodiments of the present invention. Referring to FIG. 15, the top plate (UK) has at least a portion of a wide and thin plate shape. As in one embodiment of the present invention, the top plate (UK) may be installed in the top plate holder (UKH) by forming an incline in an upright state as the top plate (UK) forms an upwardly inclined shearing blade according to the shearing angle, but is not limited thereto. The top plate (UK) may have cutting particles coated on the surface. That is, the top plate (UK) may cut the electrode in one stroke by rapidly moving downward, but is not limited thereto, and the electrode may be cut by reciprocating at short intervals to cut the electrode. The cutting particles are not limited and may be various, but are preferably particles with high hardness, such as diamond, to ensure low wear even with high friction.

[0097] Referring to Fig. 15, an electrode (EP) continuously supplied from an electrode supply unit (ES) can be cut to a certain size by an electrode cutting device located on the electrode supply unit (ES).

[0098]

[0099] Fig. 16 is a conceptual diagram illustrating a side view of an electrode cutting device according to an embodiment of the present invention. As described above, the thin side, i.e., the lower surface, of the upper surface (UK) according to an embodiment of the present invention for cutting the electrode (EP) may be symmetrical with respect to an imaginary plane. Here, the imaginary plane is a plane that simultaneously includes a first direction (D1) and a third direction (D3), and the first direction (D1) may penetrate the center of the lower surface of the upper surface (UK). In addition, as illustrated in Fig. 16, the point at which the upper surface (UK) descends and contacts the electrode may preferably be close to one end of the surface of the lower surface (LK) that supports the electrode. The normal force that the lower surface (LK) uses to support the electrode upward and the force that the upper surface (UK) applies to the electrode when it descends may have opposite action directions.

[0100] The top coat (UK) may have a thickness of 0.02 mm to 0.1 mm in the plate-shaped portion. Conventional top coats (UK) may require a separate process, such as a cutting process, to manufacture the lower surface. However, in practice, it may not be easy to manufacture the lower surface with a width of less than 0.1 mm. However, the top coat (UK) according to one embodiment of the present invention has at least a portion of a wide plate shape, and thus can be manufactured with a thickness of less than 0.1 mm, particularly up to 0.02 mm. Therefore, the top coat (UK) may be sharper, so that the electrode can be cut more sharply.

[0101]

[0102] The stripper (STP) according to an embodiment of the present invention has the effect of increasing stripping force by gradually decreasing the width (PJPWD) of the protrusion in the protrusion direction (PJD). That is, since the width (PJPWD) of the protrusion is smaller than the width (BDPWD) of the main body, the stripper (STP) can easily fix the electrode before cutting the electrode.

[0103] A stripper (STP) according to another embodiment of the present invention has the effect of reducing wear between the stripper (STP) and the top coat (UK) because the protrusion (PJP) does not come into close contact with the top coat (UK). In addition, the stripping force of the stripper (STP) has the effect of increasing due to the lateral pressure applied to the top coat (UK) because the protrusion (PJP) and the top coat (UK) do not come into close contact with each other.

[0104]

[0105] While embodiments of the present invention have been described with reference to the attached drawings, the present invention may be implemented in other specific forms without altering the technical spirit or essential features thereof. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

Claims

1. Upper cutting part including the drawing holder and drawing; A topography adjustment unit adjacent to one side of the above topography; Hado; and Including a stripper configured to secure the electrode, The above stripper is adjacent to the other side of the above-mentioned upper surface and is located on the upper surface of the above-mentioned lower surface, The above stripper includes a main body and a protrusion protruding downward from the main body and in contact with the electrode, An electrode cutting device for an all-solid-state battery, wherein the minimum width of the protrusion is 0.1 to 0.5 compared to the width of the main body.

2. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein the protrusion comprises a curved portion adjacent to the other side of the upper surface and having a curved shape.

3. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein the width of the protrusion decreases in the protruding direction.

4. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein the width of the main body is 10 mm to 20 mm.

5. In paragraph 3, An electrode cutting device for an all-solid-state battery, wherein the minimum width of the protrusion is 3 mm or more.

6. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein the protrusion length of the above protrusion is 3 mm to 5 mm.

7. In paragraph 1, The above-mentioned picture and the above-mentioned picture holder are an electrode cutting device for an all-solid-state battery, which are incompletely connected to each other.

8. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein the above-mentioned phase adjustment unit includes a phase adjustment device that applies lateral pressure to the side of the phase.

9. In paragraph 8, An electrode cutting device for an all-solid-state battery, wherein the lateral pressure of the above-mentioned pressure regulator is 0.1 MPa to 0.5 MPa.

10. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein the upper surface moves in an up-and-down direction and one side of the upper surface and one side of the lower surface intersect each other.

11. Upper cutting part including the drawing holder and drawing; A top surface adjustment unit adjacent to the side of the above-mentioned top surface; Hado; and Including a stripper configured to secure the electrode, The above stripper is adjacent to the other side of the above-mentioned upper surface and is located on the upper surface of the above-mentioned lower surface, The above stripper includes a protrusion that comes into contact with the electrode, The protrusion includes a first surface in contact with the electrode and a second surface adjacent to the surface, An electrode cutting device for an all-solid-state battery, wherein the contact angle formed by the first surface and the second surface of the protrusion is less than 90°.

12. In paragraph 11, An electrode cutting device for an all-solid-state battery, wherein the protrusion further includes a curved portion located at a portion where the first surface and the second surface contact each other.

13. In paragraph 11, An electrode cutting device for an all-solid-state battery, wherein the width of the protrusion becomes smaller as it protrudes in the direction of protrusion.

14. In paragraph 11, An electrode cutting device for an all-solid-state battery, wherein the minimum width of the above protrusion is 3 mm or more.

15. In paragraph 11, An electrode cutting device for an all-solid-state battery, wherein the protrusion length of the above protrusion is 3 mm to 5 mm.

16. In paragraph 11, The above stripper further includes a main body, An electrode cutting device for an all-solid-state battery, wherein the width of the main body is 10 mm to 20 mm.

17. In paragraph 11, An electrode cutting device for an all-solid-state battery, wherein the above-mentioned surface and the above-mentioned surface holder are incompletely joined.

18. In paragraph 11, An electrode cutting device for an all-solid-state battery, wherein the above-mentioned phase adjustment unit includes a phase adjustment device that applies lateral pressure to the side of the phase.

19. In paragraph 18, An electrode cutting device for an all-solid-state battery, wherein the lateral pressure of the above-mentioned pressure regulator is 0.1 MPa to 0.5 MPa.

20. In paragraph 11, An electrode cutting device for an all-solid-state battery, wherein the upper surface moves in an up-and-down direction and one surface of the upper surface and one surface of the lower surface intersect.

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