Electrode cutting device for all-solid-state battery

Abstract

The present invention relates to an electrode cutting device for an all-solid-state battery. More specifically, the electrode cutting device for an all-solid-state battery comprises: an upper-knife cutting unit including an upper-knife holder, an upper knife, and a guide; an upper-knife adjustment unit positioned on one side of the upper knife; and a lower knife. The upper knife includes: a first shear blade sloped upward at shear angle θ1 from one end of the bottom edge of the upper knife toward the central axis thereof; and a second shear blade sloped upward at shear angle θ2 from the other end of the bottom edge toward the central axis, wherein at least one of θ1 and θ2 is in the range of 0.5-5°.

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 top surface inclined upward toward the top surface center axis so as to reduce shear load.

[0002]

[0003] All-solid-state batteries, unlike lithium-ion batteries, utilize solid electrolytes, leading to changes in the electrode material. Consequently, all-solid-state batteries are replacing copper (Cu) with SUS as the anode substrate to reduce reactivity with the electrolyte. While aluminum (Al) is used as the cathode substrate, SUS, the anode substrate, has a tensile strength more than three times that of Al, requiring high shear force when shearing the anode plate. However, the brittleness of the coating applied to the anode plate limits the increase in shear force. Therefore, a cutting technology for all-solid-state batteries that minimizes shear load is required.

[0004]

[0005] 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 electrode cutting by minimizing the shear load applied to the electrode.

[0006] 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.

[0007]

[0008] According to the concept of the present invention, an electrode cutting device for an all-solid-state battery comprises: a top-coat cutting portion including a top-coat holder, a top-coat and a guide; a top-coat adjusting portion located on a side of the top-coat; and a lower portion, wherein the top-coat comprises a first shear blade inclined upward at a shear angle θ1 toward a center axis of the top-coat at one end of the lower portion and a second shear blade inclined upward at a shear angle θ2 toward a center axis of the top-coat at the other end of the lower portion, and at least one of θ1 and θ2 may be 0.5° to 5°.

[0009] According to another concept of the present invention, an electrode cutting device for an all-solid-state battery comprises: a top-coat cutting portion including a top-coat holder, a top-coat, and a guide; a top-coat adjusting portion located on a side of the top-coat; and a lower portion, wherein the top-coat comprises a third shear blade inclined upward at a shear angle θ3 toward a center axis of the top-coat at one end of the lower portion, a fourth shear blade inclined upward at a shear angle θ4 between the third shear blade and the top-coat center axis, a fifth shear blade inclined upward at a shear angle θ5 toward the center axis of the top-coat at the other end of the lower portion, and a sixth shear blade inclined upward at a shear angle θ6 between the fifth shear blade and the top-coat center axis, wherein θ4 may be greater than θ3, and θ6 may be greater than θ5.

[0010]

[0011] The present invention can reduce detachment during electrode cutting by using a shear blade including two or more shear blades inclined upward toward the central axis of the shear blade.

[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 schematic diagram illustrating a conventional electrode cutting device for a secondary battery.

[0015] Figure 2 is a schematic conceptual diagram illustrating an electrode cutting device for an all-solid-state battery according to embodiments of the present invention.

[0016] Figures 3 to 5 are conceptual diagrams showing the top view of an electrode cutting device for an all-solid-state battery according to embodiments of the present invention.

[0017] FIG. 6 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.

[0018] FIG. 7 is a drawing showing a fastening state of an electrode cutting device including a stripper according to embodiments of the present invention.

[0019] Figures 8 to 10 are conceptual diagrams briefly illustrating an electrode cutting process of an electrode cutting device according to embodiments of the present invention.

[0020]

[0021] 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.

[0022] 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.

[0023] 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.

[0024] The present invention is susceptible to various modifications and takes various forms. Specific embodiments are illustrated in the drawings and described in detail herein. However, this is not intended to limit the present invention to specific disclosed forms, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0025]

[0026] Figure 1 is a schematic conceptual diagram of a conventional electrode cutting device for a secondary battery. Referring to Figure 1, a typical electrode cutting device for a secondary battery includes a conventional upper guide (EUK), a guide (GD), and a lower guide (LK). The lower part of the upper guide (EUK) of the conventional electrode cutting device for a secondary battery has a straight shape without a separate shear angle.

[0027]

[0028] Fig. 2 is a schematic conceptual diagram illustrating an electrode cutting device for an all-solid-state battery according to embodiments of the present invention. Referring to Fig. 2 and Fig. 6 described below, the electrode cutting device for an all-solid-state battery may include an upper cutting portion (UKP), a top coat adjusting portion (UKAP), and a lower coat (LK). The upper cutting portion (UKP) may include a top coat holder (UKH), a top coat (UK), a guide (GD), and a lower coat (LK).

[0029] 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.

[0030] The top cover (UK) can be joined to the upper holder (UKH). The top cover (UK) and the top cover (UK) can be incompletely joined. The incomplete joining means that the top cover (UK) and the top cover (UK) are not completely joined. The top cover (UK) and the top cover (UK) can be fastened with bolts, and the protrusion attached to the top holder (UKH) can be joined by contacting the hole formed in the top cover (UK).

[0031] As the top coat (UK) 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 adjustment part (UKAP). The top coat adjustment part (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). The clearance represents the amount of one-sided gap between the top coat (UK) and the bottom coat (LK).

[0032] The UK blade can have a wide width on both sides of the blade's lower edge and a narrow blade toward the center in the longitudinal direction. In other words, the blade at the bottom of the UK can form a blade that slopes upward toward the center in the longitudinal direction of the UK. The reason for this configuration 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, which can prevent the electrode from being torn or damaged.

[0033] The upper part (UK) may include a first shear blade (SB1) and a second shear blade (SB2). The angle formed between the first shear blade (SB1) and a longitudinal horizontal line (HL) of the upper part (UK) is a shear angle θ1. In addition, the angle formed between the second shear blade (SB2) and a longitudinal horizontal line of the upper part (UK) is a shear angle θ2.

[0034] The first shear blade (SB1) can be formed to be inclined upward at θ1 toward the central axis (CA) of the upper surface (UK) from one end (T1) of the lower surface.

[0035] The second shear blade (SB2) can be formed to be inclined upward at θ2 toward the central axis (CA) of the upper surface (UK) from the other end (T2) of the lower surface.

[0036] The shear angles θ1 and θ2 may be the same or different. In addition, at least one of θ1 and θ2 may have an angular range of 0.1° to 5°, 0.3° to 3.5°, 0.5° to 3.5°, or 2.5° to 3.5°.

[0037] When the shear angles θ1 and θ2 are equal, the phase diagrams (UK) can have symmetrical structures with respect to the phase diagram central axis (CA).

[0038] Referring to FIG. 4, the upper part (UK) may include a third shear blade (SB3) to a sixth shear blade (SB6).

[0039] The angle between the third shear edge (SB3) and the longitudinal horizontal line (HL1) of the upper part (UK) may be a shear angle θ3. In addition, the angle between the fourth shear edge (SB4) and another longitudinal horizontal line (HL2) of the upper part may be a shear angle θ4. Similarly, shear angles θ5 and θ6 may be defined.

[0040] The third shear blade (SB3) can be formed to be inclined upward at θ3 toward the central axis (CA) of the upper surface (UK) from one end (T1).

[0041] The fifth shear blade (SB5) can be formed to be inclined upward at θ5 toward the central axis (CA) of the upper section (UK) from the other end (T2) of the lower section.

[0042] The fourth shear blade (SB4) can be formed to be inclined upward at θ4 toward the central axis (CA) from the tip (T3) of the third shear blade (SB3).

[0043] The sixth shear blade (SB6) can be formed to be inclined upward at θ6 toward the central axis (CA) from the tip (T4) of the fifth shear blade (SB5).

[0044] The shear angle θ4 may be greater than θ3, and θ6 may be greater than θ5. Furthermore, the shear angles θ3 and θ5 may be the same or different. At least one of θ3 and θ5 may have an angular range of 0.1° to 5°, 0.3° to 3°, or 0.5° to 1°.

[0045] The shear angles θ4 and θ6 may be the same or different. In addition, at least one of θ4 and θ6 may have an angular range of 0.1° to 5°, 0.3° to 4°, 0.5° to 4°, 1° to 4°, or 2.5° to 3.5°.

[0046] When the shear angles θ3 and θ5 and θ4 and θ6 are equal, the phase diagrams (UK) can have symmetrical structures with respect to the phase diagram center axis (CA).

[0047] The UKL is located at the lowest part of the UK and is the part that comes into contact with the LK. The UKL may be the same thickness as the UK, or may be thinner than the UK. The longer the UKL, the more likely it is that the electrode will detach when cut. The UKL may have a length of 0.5 mm to 5 mm, 0.5 mm to 4 mm, or 0.5 mm to 2.5 mm.

[0048] 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 the guide (GD), 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.

[0049] The top plate holder (UKH) can serve to fix the top plate (UK) and support the upper cutting part (UKP) so that it can slide up and down. The top plate holder (UKH) can fix the top plate (UK) and move it up and down along the guide (GD). The top plate holder (UKH) can be positioned above the top plate (UK) and can also be larger in size than the top plate (UK).

[0050] 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.

[0051] 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 perpendicular to 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 in turn improve electrode quality.

[0052]

[0053] FIG. 3 illustrates a top view (UK) according to one embodiment of the present invention, and illustrates a top view (UK) with different shear angles θ1 and θ2. Referring to FIG. 3, θ1 may be greater than θ2. When θ1 is greater than θ2, the point where the first shear blade (SB1) and the second shear blade (SB2) contact each other may shift to the left with respect to the top view central axis (CA). Conversely, θ1 may be less than θ2. When θ1 is less than θ2, the point where the first shear blade (SB1) and the second shear blade (SB2) contact each other may be horizontally offset with respect to the top view central axis (CA).

[0054]

[0055] FIG. 5 illustrates another UK according to one embodiment of the present invention, and illustrates a UK in which shear angles θ3 and θ5, and θ4 and θ6 are different. Referring to FIG. 3, θ3 may be greater than θ5, and θ4 may be greater than θ6. When θ3 and θ4 are greater than θ5 and θ6, respectively, the point where the fourth shear blade (SB4) and the sixth shear blade (SB6) contact each other may shift to the left with respect to the central axis of the topography (CA). Conversely, θ3 may be less than θ5, and θ4 may be less than θ6. When θ3 and θ4 are less than θ5 and θ6, respectively, the point where the fourth shear blade (SB4) and the sixth shear blade (SB6) contact each other may be horizontally offset with respect to the central axis of the topography (CA).

[0056]

[0057] FIG. 6 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. 6, 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), a guide (GD), and a top coat (UK). The top coat holder (UKH), the guide (GD), and the top coat (UK) may be integrally coupled. The top coat holder (UKH) and the top coat (UK) may be incompletely coupled. The guide (GD) may be positioned at the rear of the top coat holder (UKH). The top coat holder (UKH) coupled to the top coat (UK) may be driven up and down along the guide (GD).

[0058] An electrode supply section (ES) may be located on the side of the lower section (LK). The electrode supply section (ES) serves to continuously supply electrodes. The electrode (EP) supplied from the electrode supply section (ES) may be cut at regular intervals by the upper cutting section (UKP) that moves up and down and the fixed lower section (LK).

[0059]

[0060] Fig. 7 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. 7, 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 to be elastically slidable by a guide (GD) 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.

[0061] Referring to Fig. 7, the stripper (STP) may not be in close contact with the top coat (UK). To adjust this, the top coat adjuster (UKA) of Fig. 6 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.

[0062]

[0063] FIGS. 8 to 10 are conceptual diagrams briefly illustrating an electrode cutting process of an electrode cutting device according to embodiments of the present invention. Referring to FIG. 8, 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 inclined edge in an upright state according to a shear angle, but is not limited thereto. The top plate (UK) may have cutting particles coated on its 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 top plate (UK) may cut the electrode 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.

[0064] Referring to Fig. 8, the electrode (EP) continuously supplied from the electrode supply unit (ES) can be cut to a certain size by an electrode cutting device located on the electrode supply unit (ES).

[0065]

[0066] Fig. 9 is a front view of an electrode cutting device according to an embodiment of the present invention. Referring to Fig. 9, the upper part (UK) may have a symmetrical structure with respect to the first axis (D1), or may have an asymmetrical structure if the shear angles of the two ends are different. The second axis (D2) is orthogonal to the first axis (D1) and the third axis (D3) and is parallel to the direction parallel to the electrode (EP). The first axis (D1) passes through the center of the upper part (UK).

[0067] The UK moves along the first axis (D1), particularly in the up-and-down direction, and cuts the electrode (EP). At this time, since kinetic energy is proportional to the square of the speed, the UK must move at a very high speed so that its kinetic energy increases significantly and the electrode (EP) can be easily cut. If the UK is heavy, its potential energy is proportional to its weight, so when the UK is positioned upward, its potential energy is large. Therefore, even if it simply falls freely downward, the converted kinetic energy is also large, so the electrode (EP) can be easily cut. However, if the UK is light, its potential energy is not large. Therefore, it is desirable for a separate power device to increase the kinetic energy when the UK holder (UKH) moves the UK from upward to downward. Such a separate power device may include, but is not limited to, a hydraulic or pneumatic press, an electric motor, and various other devices.

[0068] Meanwhile, if the UK does not form a slope and the lower surface of the UK is arranged parallel to the electrode EP, the lower surface simply strikes the electrode EP when the UK moves downward. Then, the contact area between the lower surface of the UK and the electrode EP is relatively large, so that the kinetic energy is dispersed and the electrode EP may not be sharply cut.

[0069]

[0070] Fig. 10 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 axis (D1) and a third axis (D3), and the first axis (D1) may pass through the center of the lower surface of the upper surface (UK). In addition, as illustrated in Fig. 10, 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) supports the electrode upward and the force that the upper surface (UK) applies to the electrode when it descends may have opposite action directions.

[0071] Referring to FIGS. 6 and 10, the lower right portion of the upper surface (UK) may be formed to be inclined. The lower portion of the upper surface (UK) may be inclined upward from the upper surface land portion (UKL) in the opposite direction of the lower surface (LK). Accordingly, when the upper surface (UK) is lowered to cut the electrode (EP), the cut electrode can move in the opposite direction of the lower surface (LK) along the third axis (D3) at the same time as being cut. Accordingly, a gap of a certain distance may be generated between the electrodes cut by the electrode cutting device.

[0072] 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.

[0073]

[0074] Hereinafter, the present invention will be described in more detail through examples. However, these examples are intended to exemplify the present invention and the scope of the present invention is not limited to these examples.

[0075]

[0076] Example 1

[0077] A shear angle of 0.5° was produced, and an electrode cutting device was manufactured by combining this with a shear angle holder to cut the cathode.

[0078]

[0079] Example 2

[0080] A 1° shear angle was created, and an electrode cutting device was created by combining this with a 1° shear angle holder to cut the cathode.

[0081]

[0082] Example 3

[0083] A 3° shear angle was created, and an electrode cutting device was created by combining this with a 3° shear angle holder to cut the cathode.

[0084]

[0085] Example 4

[0086] A shear angle of 0.5° was produced, and an electrode cutting device was manufactured by combining this with a shear angle holder to cut the positive electrode.

[0087]

[0088] Example 5

[0089] A shear angle of 1° was produced, and an electrode cutting device was manufactured by combining this with a shear angle holder to cut the anode.

[0090]

[0091] Example 6

[0092] A shear angle of 3° was produced, and an electrode cutting device was manufactured by combining this with a shear angle holder to cut the positive electrode.

[0093]

[0094] Example 7

[0095] A plate without a plate land was manufactured, and after combining it with a plate holder, an electrode cutting device was manufactured by applying a lateral pressure of 0.05 MPa using a plate adjuster to cut the cathode.

[0096]

[0097] Example 8

[0098] A plate without a plate land was manufactured, and after combining it with a plate holder, an electrode cutting device was manufactured by applying a lateral pressure of 0.1 MPa using a plate adjuster to cut the cathode.

[0099]

[0100] Example 9

[0101] A plate without a plate land was manufactured, and after combining it with a plate holder, an electrode cutting device was manufactured by applying a lateral pressure of 0.2 MPa using a plate adjuster to cut the cathode.

[0102]

[0103] Example 10

[0104] A 0.5 mm long slab was manufactured, and after combining it with a slab holder, a 0.05 MPa lateral pressure was applied using a slab adjuster to manufacture an electrode cutting device to cut the cathode.

[0105]

[0106] Example 11

[0107] A 0.5 mm long slab was manufactured, and after combining it with a slab holder, a 0.1 MPa lateral pressure was applied using a slab adjuster to manufacture an electrode cutting device to cut the cathode.

[0108]

[0109] Example 12

[0110] A 0.5 mm long slab was manufactured, and after combining it with a slab holder, a 0.2 MPa lateral pressure was applied using a slab adjuster to manufacture an electrode cutting device to cut the cathode.

[0111]

[0112] Comparative Example 1

[0113] A shear angle-free slit was created, and an electrode cutting device was created by combining it with a slit holder to cut the cathode.

[0114]

[0115] Comparative Example 2

[0116] A sandpaper without a sandpaper land was manufactured, and an electrode cutting device was manufactured by combining it with a sandpaper holder to cut the cathode.

[0117]

[0118] Evaluation Example 1: Detachment level during electrode cutting according to shear angle size

[0119] The cutting height and shear force of the base material when cutting the positive or negative electrode using the electrode cutting device manufactured in Examples 1 to 6 and Comparative Example 1 are shown in Table 1.

[0120] The cutting height of the base material refers to the height of the triangle formed by the shear blade of the upper drawing shown in FIGS. 2 to 5 and the horizontal line in the longitudinal direction of the upper drawing.

[0121]

[0122] Example Shear angle (θ) Electrode base material cutting height (H, mm) Shear force P (kgf) Example 10.5 Cathode 0.5 3 0 6 3 2 1.6 3 9 6 Example 21 Cathode 1.0 6 1 2 1 4.4 1 3 1 Example 33 Cathode 3.1 8 4 2 1 0 7.2 0 6 5 Example 40.5 Anode 0.5 0 2 7 3 2 7.2 6 2 0 Example 51 Anode 1.0 0 5 3 2 1 8.1 7 4 7 Example 63 Anode 3.0 1 6 6 1 0 9.0 8 7 3

[0123] As shown in Table 1, it can be confirmed that the electrode cutting devices of Examples 1 to 3 have a reduced shear force compared to the electrode cutting device of Comparative Example 1. In particular, when Examples 1 to 3 are compared, it can be confirmed that the shear force decreases as the shear angle of the top coat increases. When the shear angle of the top coat is 3°, the lowest shear force is shown, indicating that the shear load applied to the top coat is the lowest. Referring to Examples 3 and 6, it can be seen that when the shear angle is 3°, the least detachment occurs during electrode cutting. This is because as the shear angle of the top coat approaches 3°, the cutting height of the base material increases, thereby reducing the shear force applied to the top coat. When Examples 4 to 6 are compared, it can be confirmed that even when the positive electrode is cut by gradually increasing the shear angle, the shear force gradually decreases as the shear angle approaches 3°. This is believed to be because, as the shear angle of the upper surface approaches 3°, the cutting height of the base material increases, thereby reducing the shear force applied to the upper surface. A decrease in the shear force applied to the upper surface increases the cutting force of the electrode cutting device, thereby improving the quality of the cutting device.

[0124]

[0125] Evaluation Example 2: Detachment level during electrode cutting according to the length of the sand land

[0126] The degree of detachment when the cathode was cut using the electrode cutting device manufactured in Examples 7 to 12 and Comparative Example 2 is shown in Table 2.

[0127]

[0128] Example Land part (mm) Pressure (MPa) Detachment (μm) Example 700.05 Uncut Example 800.1103.07 Example 900.289.97 Example 100.50.05 Uncut Example 110.50.1405.05 Example 120.50.2342.83 Comparative example 200 Uncut

[0129] Referring to Table 2, it can be confirmed that the wider the top coat land, the more delamination increases. In addition, it can be confirmed that the delamination decreases as the lateral pressure of the top coat adjustment part increases. This is believed to be because the clearance between the top coat and the bottom coat and the pressure applied to the electrode increase as the top coat land part becomes smaller and the lateral pressure of the top coat adjustment part increases, which increases the cutting force. In particular, the delamination was measured to be the lowest when the length of the top coat land part was 0 mm and the lateral pressure was 0.2 MPa.

[0130]

[0131] Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications can be made within the scope of the patent claims, the detailed description of the invention, and the attached drawings, and it is obvious that this also falls within the scope of the present invention.

Claims

1. A cutting section including a cutting tool holder, a cutting tool and a guide; A top-down adjustment unit located on the side of the top-down; and Including the lower part, The above-mentioned upper part includes a first shear blade inclined upward at a shear angle θ1 toward the upper part's central axis at one end of the lower part, and a second shear blade inclined upward at a shear angle θ2 toward the upper part's central axis at the other end of the lower part, An electrode cutting device for an all-solid-state battery, wherein at least one of the above θ1 and the above θ2 is 0.5° to 5°.

2. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein at least one of the above θ1 and the above θ2 is 2.5° to 3.5°.

3. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein the above-mentioned holder and the above-mentioned plate are incompletely bonded.

4. 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 surface of the above-mentioned phase.

5. In paragraph 1, An electrode cutting device for an all-solid-state battery, further comprising a stripper positioned between the upper and lower layers and separating the electrode from the upper layer.

6. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein the upper and lower surfaces move in an up-and-down direction and one surface of the upper surface and one surface of the lower surface intersect.

7. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein the first shear blade and the second shear blade have a symmetrical structure based on the central axis of the upper surface.

8. In paragraph 1, The above-mentioned figure includes a land portion at its lower part, An electrode cutting device for an all-solid-state battery, wherein the above-mentioned land portion has a length of 0.5 mm to 4 mm.

9. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein the above-mentioned pressure regulator is configured to apply a lateral pressure of 0.1 MPa to 0.5 MPa to the above-mentioned pressure.

10. In paragraph 1, The above θ1 and the above θ2 are different from each other, and are an electrode cutting device for an all-solid-state battery.

11. A cutting section including a cutting tool holder, a cutting tool and a guide; A top-down adjustment unit located on the side of the top-down; and Including the lower part, The above-mentioned upper part includes a third shear blade inclined upward at a shear angle θ3 toward the upper part central axis at one end of the lower part, a fourth shear blade inclined upward at a shear angle θ4 between the third shear blade and the upper part central axis, a fifth shear blade inclined upward at a shear angle θ5 toward the upper part central axis at the other end of the lower part, and a sixth shear blade inclined upward at a shear angle θ6 between the fifth shear blade and the upper part central axis. The above θ4 is greater than the above θ3, The above θ6 is a device for cutting electrodes for an all-solid-state battery, wherein the above θ5 is greater than the above θ6.

12. In paragraph 11, An electrode cutting device for an all-solid-state battery, wherein at least one of the above θ3 or θ5 is 0.5° to 1°.

13. In paragraph 11, An electrode cutting device for an all-solid-state battery, wherein at least one of the above θ4 or θ6 is 1° to 4°.

14. In paragraph 11, An electrode cutting device for an all-solid-state battery, further comprising a stripper positioned between the upper and lower layers and separating the electrode from the upper layer.

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

16. In paragraph 11, An electrode cutting device for an all-solid-state battery, wherein the above-mentioned pressure adjusting unit includes a pressure adjusting device that applies lateral pressure to the other side of the pressure plate, and the lateral pressure is 0.1 MPa to 0.5 MPa.

17. In paragraph 11, An electrode cutting device for an all-solid-state battery, wherein the above-mentioned surface includes a surface land portion, and the surface land portion has a length of 0.5 mm to 4 mm.

18. In paragraph 11, An electrode cutting device for an all-solid-state battery, wherein the third to sixth shear blades form a symmetrical structure with respect to the central axis of the upper surface.

19. In paragraph 11, At least one of the above θ3 and the above θ5 is 0.2° to 0.8°, An electrode cutting device for an all-solid-state battery, wherein at least one of the above θ4 and the above θ6 is 2.5° to 3.5°.

20. In paragraph 11, An electrode cutting device for an all-solid-state battery, wherein the above θ3 and the above θ5 or the above θ4 and the above θ6 are not equal to each other.

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