Electrode cutting device for all-solid-state battery

Abstract

The present invention relates to an electrode cutting device for all-solid-state batteries, the electrode cutting device, more specifically, comprising: an upper knife cutting part comprising an upper knife holder, an upper knife, and a coupling part; an upper knife adjustment part positioned on one side of the upper knife; and a lower knife, wherein the upper knife comprises a shear blade sloped at shear angle θ from one to the other end of the bottom edge, the shear blade comprising an upper knife landing part, and the ratio of the length of same to shear angle θ being 0.15-1 mm / °.

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 coating capable of preventing detachment during shearing of a brittle material.

[0002]

[0003] All-solid-state batteries, unlike lithium-ion batteries, utilize solid electrolytes, which have led 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 needed.

[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 cutting of an electrode having high tensile strength and strong brittleness.

[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 joining portion; a top-coat adjusting portion located on a side of the top-coat; and a lower portion, wherein the top-coat includes a shearing blade that is inclined upward from one end of the lower portion toward the other end at a shearing angle θ, and the shearing blade includes a top-coat land portion, and a ratio of the length of the top-coat land portion to the shearing angle θ may be 0.15 mm / ° or more and less than 1 mm / °.

[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 joining portion; a top-coat adjusting portion located on a side of the top-coat; and a lower portion, wherein the top-coat includes a first shear blade and a second shear blade having different shear angles, wherein the first shear blade is inclined upward at a shear angle θ1 and includes a first top-coat land portion, and the second shear blade is inclined upward at a shear angle θ2 and includes a second top-coat land portion, wherein θ1 is smaller than θ2, and a ratio of a length of the first top-coat land portion to θ1 may be greater than a ratio of a length of the second top-coat land portion to θ2.

[0010] The present invention can reduce detachment during electrode cutting by varying the shear angle and the length of the upper land portion.

[0011] 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.

[0012]

[0013] FIG. 1 is a schematic conceptual diagram illustrating an electrode cutting device according to embodiments of the present invention.

[0014] Figures 2 to 7 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.

[0015] FIGS. 8A to 12 are conceptual diagrams showing the lower part of the top view of an electrode cutting device for an all-solid-state battery according to embodiments of the present invention illustrated in FIGS. 3 to 8.

[0016] FIG. 13 is a side view of a top view of an electrode cutting device for an all-solid-state battery according to embodiments of the present invention.

[0017] FIG. 14 is a perspective view showing a top view of an electrode cutting device for an all-solid-state battery according to embodiments of the present invention.

[0018] Figure 15 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.

[0019] FIG. 16 is a drawing showing a fastening state of an electrode cutting device including a stripper according to embodiments of the present invention.

[0020] Figures 17 to 19 are conceptual diagrams briefly illustrating an electrode cutting process of an electrode cutting device according to embodiments of the present invention.

[0021]

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026]

[0027] FIG. 1 is a schematic conceptual diagram illustrating an electrode cutting device according to embodiments of the present invention. Referring to FIG. 1, the electrode cutting device for an all-solid-state battery may include an upper part (UK) and a lower part (LK). Referring to FIG. 1 and FIG. 15 described below, the electrode cutting device for an all-solid-state battery may include an upper cutting portion (UKP), an upper part adjusting portion (UKAP), and a lower part (LK). The upper cutting portion (UKP) may include an upper part holder (UKH), an upper part (UK), a coupling portion (CP), a guide (GD), and a lower part (LK).

[0028]

[0029] FIG. 2 is a conceptual diagram illustrating an electrode cutting device for an all-solid-state battery according to embodiments of the present invention. Referring to FIG. 2, the upper part (UK) may be positioned at the top of the electrode cutting device as a knife for transferring an electrode. The upper part (UK) may be driven up and down to contact the lower part (LK). The upper part (UK) may be driven up and down along a guide. The upper part (UK) may move up and down to cooperate with the lower part (LK) 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 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 refers to the 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] The shear angle 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) meet may shift to the left with respect to the central axis of the curve (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) meet may be horizontally offset with respect to the central axis of the curve (CA).

[0039]

[0040] FIG. 3 is a conceptual diagram illustrating a top view of an electrode cutting device for an all-solid-state battery according to embodiments of the present invention. Referring to FIG. 3, the top view may include a shear blade (SBa) inclined upward at a shear angle a. The shear angle refers to the angle formed between the shear blade and a horizontal line in the longitudinal direction of the top view. The shear blade (SBa) may be inclined upward in a second direction (D2) based on FIG. 3, or may be inclined upward in a direction opposite to the second direction (D2). The shear angle a may have an angle range of 0.1° to 5°, 0.3° to 3.5°, 0.5° to 3.5°, or 2.5° to 3.5°.

[0041]

[0042] FIG. 4 is a conceptual diagram illustrating a top view of an electrode cutting device for an all-solid-state battery according to embodiments of the present invention. Referring to FIG. 4, the top view may include a b shear blade (SBb) and a c shear blade (SBc) that are inclined upward at shear angles b and c, respectively. With reference to FIG. 4, the b shear blade (SBb) and the c shear blade (SBc) may be inclined upward in a second direction (D2) or may be inclined upward in a direction opposite to the second direction (D2). The shear angle b may have an angle range of 0.1° to 5°, 0.3° to 3.5°, 0.5° to 3.5°, or 2.5° to 3.5°. In addition, the shear angle c may have an angle range of 0.1° to 5°, 0.3° to 3.5°, 0.5° to 3.5°, or 2.5° to 3.5°. Shear angle b and shear angle c may be equal or different. If shear angle b and shear angle c are equal, shear edge b (SBb) and shear edge c (SBc) may be located on the same line.

[0043]

[0044] FIG. 5 is a conceptual diagram illustrating a top view of an electrode cutting device for an all-solid-state battery according to embodiments of the present invention. Referring to FIG. 5, the top view may include a d shear blade (SBd), an e shear blade (SBe), and an f shear blade (SBf) that are inclined upward at shear angles d, e, and f, respectively. With reference to FIG. 5, the d shear blade (SBd), the e shear blade (SBe), and the f shear blade (SBf) may be inclined upward in a second direction (D2) or may be inclined upward in a direction opposite to the second direction (D2). The shear angle d may have an angle range of 0.1° to 5°, 0.3° to 3.5°, 0.5° to 3.5°, or 2.5° to 3.5°. Additionally, the shear angle e can 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°. The shear angle f can 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°. The shear angle d and the shear angle e can be the same or different. When the shear angle d and the shear angle e are the same, the d shear edge (SBd) and the e shear edge (SBe) can be located on the same line. The shear angle e and the shear angle f can be the same or different. When the shear angle e and the shear angle f are the same, the e shear edge (SBe) and the f shear edge (SBf) can be located on the same line.

[0045]

[0046] Referring to Fig. 6, the upper part (UK) may include a third shear blade (SB3) to a sixth shear blade (SB6). The angle formed by the third shear blade (SB3) and a longitudinal horizontal line (HL1) of the upper part (UK) may be a shear angle θ3. In addition, the angle formed by the fourth shear blade (SB4) and another longitudinal horizontal line (HL2) of the upper part (UK) may be a shear angle θ4. Similarly, shear angles θ5 and θ6 may be defined.

[0047] 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).

[0048] 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.

[0049] 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).

[0050] 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).

[0051] 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°.

[0052] 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°.

[0053] 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).

[0054] 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 detachment will occur when the electrode is cut. The UKL may have a length of 0.5 mm to 7 mm, 0.5 mm to 5 mm, or 0.5 mm to 2.5 mm.

[0055] 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.

[0056] The UKH can serve to fix the UK and support the upper 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.

[0057] 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.

[0058] 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.

[0059]

[0060] FIG. 7 illustrates another embodiment of a UK according to the present invention, wherein the UK has different shear angles θ3 and θ5, and θ4 and θ6. 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 move in the opposite direction to the second direction (D2) 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).

[0061]

[0062] Fig. 8a is a conceptual diagram showing the lower part of a top view among the electrode cutting devices for all-solid-state batteries according to embodiments of the present invention. Fig. 8a shows the top view (UK) of Fig. 1 as viewed from below with respect to the first direction (D1). When the top view (UK) is viewed directly from below, it may have a rectangular shape as shown in Fig. 8a. The part indicated by the solid line in Fig. 8a is the top view land portion (UKL), and the part indicated by the dotted line may be a part of the lower surface of the top view (UK) excluding the top view land portion (UKL). The following Figs. 8b to 12 illustrate only the top view land portion (UKL).

[0063] The length (L) of the upper surface land portion may be the width length of the upper surface land portion (UKL) and may be a length in a direction parallel to the third direction (D3). A typical upper surface land portion (UKL) may have a rectangular shape as illustrated in Fig. 8a. In this case, the length (L) of the upper surface land portion may be maintained constant.

[0064]

[0065] FIG. 8b is a conceptual diagram illustrating the lower part of the top coat (UK) in the electrode cutting device for an all-solid-state battery according to the embodiments of the present invention illustrated in FIG. 3. Referring to FIG. 8b, the lower part of the top coat (UK) may have a length (L) of the top coat land portion that gradually becomes thicker as it goes in the second direction (D2). The thickness of the lower part of the top coat (UK) may be the same as the length (L) of the top coat land portion. That is, the length (L) of the top coat land portion may increase as it goes in the second direction (D2). As shown in FIG. 8b, the length (L) of the top coat land portion may increase linearly as it goes in the second direction (D2), or may increase in steps as shown in FIGS. 8c to 12.

[0066]

[0067] FIG. 9A is a conceptual diagram illustrating a lower portion of a top coat among the electrode cutting devices for all-solid-state batteries according to the embodiments of the present invention illustrated in FIG. 4. Referring to FIG. 9A, the lower portion of the top coat (UK) of FIG. 4 may gradually become thicker as it goes in the second direction (D2). The thickness of the lower portion of the top coat (UK) illustrated in FIG. 9A may be equal to the length (L) of the top coat land portion. That is, the length of the top coat land portion may increase as it goes in the second direction (D2) based on FIG. 9A. In addition, the length (L) of the top coat land portion of the lower portion of the top coat (UK) may increase as it goes in the direction opposite to the second direction (D2). Since the top coat (UK) of FIG. 4 includes b shear blades and c shear blades having different shear angles, the lengths of the top coat land portions may also be different. Referring to Fig. 9a, the length (Lc) of the top surface land portion of the c shear blade may be longer than the length (Lb) of the top surface land portion of the b shear blade. The length (Lb) of the top surface land portion of the b shear blade may be 0.5 mm to 5 mm. In addition, the length (Lc) of the top surface land portion of the c shear blade may be 0.5 mm to 5 mm. The ratio of the length (Lb) of the top surface land portion of the b shear blade to the shear angles b and c and the ratio of the length (Lc) of the top surface land portion of the c shear blade may have a value substituted into Equation 1 below.

[0068] <Formula 1>

[0069] Length of the upper land part (mm) / Shear angle (°)

[0070] Referring to Equation 1, the ratio of the length (Lb) of the top surface land portion of the b shear blade (SBb) to the shear angle b can have a value of 0.1 mm / ° to 5 mm / °, 0.1 mm / ° to 3 mm / °, or 0.2 mm / ° to 2 mm / °. The ratio of the length (Lc) of the top surface land portion of the c shear blade (SBc) to the shear angle c can have a value of 0.15 mm / ° to 3 mm / °, 0.15 mm / ° to 2 mm / °, or 0.3 mm / ° to 2 mm / °.

[0071] The shear angle b may be smaller than the shear angle c. The length (Lb) of the top surface land of the b shear blade (SBb) may be shorter than the length (Lc) of the top surface land of the c shear blade (SBc). In addition, the ratio of the length (Lb) of the top surface land of the b shear blade (SBb) to the shear angle b may be greater than the ratio of the length (Lc) of the top surface land of the c shear blade (SBc) to the shear angle c.

[0072] As the size of the UK shear angle increases, the length (L) of the land portion of the land portion may also increase. At this time, the increase ratio can be expressed as the difference in the ratio of the length of the land portion of the land portion to the shear angle. For example, in the case of Fig. 9a, the increase ratio can be the value obtained by subtracting the ratio of the length (Lb) of the land portion of the b shear edge (SBb) to the b shear angle from the ratio of the length (Lc) of the land portion of the c shear edge (SBc) to the c shear angle.

[0073] The greater the increase ratio described above, the greater the occurrence of detachment during electrode cutting. Furthermore, the greater the increase ratio, the more likely the cut surface may become uneven during electrode cutting. Among these, Fig. 9a may illustrate a case where the ratio of the increase in the shear angle and the increase in the length of the upper surface land portion is 0.2 mm / ° to 2 mm / °.

[0074]

[0075] Fig. 9b is a conceptual diagram illustrating the lower part of a top surface of an electrode cutting device for an all-solid-state battery according to embodiments of the present invention. Fig. 9b is a diagram illustrating a case in which the sizes of shear angles b and c are the same as those of Fig. 9a, and the difference in the length of the top surface land portion is greater. Referring to Fig. 9b, in Fig. 9b, the increase ratio of the length of the top surface land portion according to the increase in the size of the shear angle may be greater than in the case of Fig. 9a. When the increase ratio of the length of the top surface land portion according to the increase in the size of the shear angle is large, the difference in the length of the top surface land portion may become large. In this case, the cut surface may be cut unevenly during electrode cutting, which may increase the occurrence of detachment.

[0076]

[0077] FIG. 9C is a conceptual diagram illustrating the lower part of a top coat among electrode cutting devices for all-solid-state batteries according to embodiments of the present invention. FIG. 9C is a diagram illustrating a case where the sizes of shear angles b and c are the same as those of FIG. 9A and the difference in the length of the top coat land portion is smaller. Referring to FIG. 9C, in FIG. 9C, the increase ratio of the length of the top coat land portion according to the increase in the size of the shear angle may be smaller than that of FIG. 9A. When the increase ratio of the length of the top coat land portion according to the increase in the size of the shear angle is small, the difference in the length of the top coat land portion may be small. In this case, the cut surface may be cut evenly during electrode cutting, thereby reducing the occurrence of detachment. However, the length of the top coat land portion of a shear blade with a large shear angle may be reduced, thereby reducing the durability of the shear blade. For example, in FIG. 9C, when the difference in the sizes of the shear angles c and b is large, the difference in the length of the top coat land portion (the difference between Lb and Lc) may be smaller compared to the difference in the sizes of the shear angles. At this time, the shear angle of the c shear blade (SBc) is large, but the length of the upper land portion (Lc) is small, which may reduce the durability of the shear blade.

[0078]

[0079] FIG. 10 is a conceptual diagram illustrating a lower portion of a top view among the electrode cutting devices for all-solid-state batteries according to the embodiments of the present invention illustrated in FIG. 5. Referring to FIG. 10, the lower portion of the top view (UK) of FIG. 5 may gradually become thicker in the second direction (D2). Conversely, the thickness may gradually become thicker in the direction opposite to the second direction (D2). The thickness of the lower portion of the top view (UK) illustrated in FIG. 10 may be the same as the top view land portion (UKL). That is, the length of the top view land portion (UKL) may increase in the second direction (D2) based on FIG. 10. Since the top view (UK) of FIG. 10 includes d shear blades (SBd), e shear blades (SBe), and f shear blades (SBf) having different shear angles, the lengths of the top view land portions (UKL) may also be different. Referring to FIG. 10, the length (Le) of the top surface land portion of the e shear blade (SBe) may be longer than the length (Ld) of the top surface land portion of the d shear blade (SBd). In addition, the length (Lf) of the top surface land portion of the f shear blade (SBf) may be longer than the length (Le) of the top surface land portion of the e shear blade (SBe). The length (Le) of the top surface land portion of the e shear blade (SBe) may be 0.5 mm to 5 mm. In addition, the lengths (Le and Lf) of the top surface land portions of the e shear blade (SBe) and the f shear blade (SBf) may be 0.5 mm to 5 mm. The ratio of the top surface land lengths (Ld, Le and Lf) of the d shear blade (SBd) for the shear angles d, e and f, the ratio of the top surface land length (Le) of the e shear blade (SBe) and the ratio of the top surface land length (Lf) of the f shear blade (SBf) can have the values ​​substituted into the above equation 1.

[0080] Referring to Equation 1, the ratio of the top surface land length (Ld) of the d shear blade (SBd) to the shear angles d and e and the ratio of the top surface land length (Le) of the e shear blade (SBe) to the shear angles d and e can have values ​​of 0.1 mm / ° to 5 mm / °, 0.1 mm / ° to 3 mm / ° and 0.15 mm / ° to 3 mm / °. In addition, the ratio of the top surface land length (Le) of the e shear blade (SBe) to the shear angles e and f and the ratio of the top surface land length (Lf) of the f shear blade (SBf) to the shear angles e and f can have values ​​of 0.15 mm / ° to 3 mm / °, 0.15 mm / ° to 2 mm / ° and 0.3 mm / ° to 2 mm / °.

[0081]

[0082] FIG. 11 is a conceptual diagram illustrating a lower portion of a top coat among the electrode cutting devices for all-solid-state batteries according to the embodiments of the present invention illustrated in FIG. 6. Referring to FIG. 11, the lower portion of the top coat (UK) of FIG. 6 may gradually become thicker from both ends toward the center of the top coat (UK). Conversely, the thickness may gradually become thinner from both ends toward the center of the top coat (UK). The thickness of the lower portion of the top coat (UK) illustrated in FIG. 11 may be the same as the top coat land portion (UKL). That is, the length of the top coat land portion (UKL) may increase from both ends toward the center based on FIG. 11. Since the top coat (UK) of FIG. 10 includes a third shear blade (SB3), a fourth shear blade (SB4), a fifth shear blade (SB5), and a sixth shear blade (SB6) having different shear angles, the lengths of the top coat land portions may also be different. Referring to Fig. 11, the length of the top surface land of the fourth shear blade (SB4) may be longer than that of the third shear blade (SB3). In addition, the length of the top surface land of the fifth shear blade (SB5) may be longer than that of the sixth shear blade (SB6). The length (L4) of the top surface land of the fourth shear blade (SB4) and the length (L5) of the top surface land of the fifth shear blade (SB5) may be the same or different. The length (L3) of the top surface land of the third shear blade (SB3) may be 0.5 mm to 5 mm. In addition, the lengths (L4, L5, and L6) of the top surface lands of the fourth shear blade (SB4), the fifth shear blade (SB5), and the sixth shear blade (SB6) may each be 0.5 mm to 5 mm. The ratio of the top surface land length (L3) of the third shear blade (SB3) for shear angles θ3, θ4, θ5, and θ6, the ratio of the top surface land length (L4) of the fourth shear blade (SB4), the ratio of the top surface land length (L5) of the fifth shear blade (SB5), and the ratio of the top surface land length (L6) of the sixth shear blade (SB6) can have the values ​​substituted into the above equation 1.

[0083] Referring to Equation 1, the ratio of the top surface land length (L3) of the third shear blade (SB3) to the shear angles θ3 and θ4 and the ratio of the top surface land length (L4) of the fourth shear blade (SB4) may have values ​​of 0.1 mm / ° to 5 mm / °, 0.1 mm / ° to 3 mm / ° and 0.15 mm / ° to 3 mm / °. In addition, the ratio of the top surface land length (L6) of the sixth shear blade (SB6) to the shear angles θ6 and θ5 and the ratio of the top surface land length (L5) of the fifth shear blade (SB5) may have values ​​of 0.1 mm / ° to 5 mm / °, 0.1 mm / ° to 3 mm / ° and 0.15 mm / ° to 3 mm / °.

[0084]

[0085] Fig. 12 is a conceptual diagram showing the lower part of the electrode cutting device for an all-solid-state battery according to embodiments of the present invention illustrated in Fig. 7. Fig. 12 is a diagram showing a case in which the shear angle θ3 is greater than θ6 and θ4 is greater than θ5 in Fig. 11 described above.

[0086]

[0087] Fig. 13 is a side view of a top view (UK) of an electrode cutting device for an all-solid-state battery according to embodiments of the present invention. Referring to Fig. 13, 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).

[0088] 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.

[0089] The second coupling hole (CH2) may serve as a guide to facilitate replacement of the UK and may serve to fix the UK in the vertical direction. The second coupling hole (CH2) may be a portion where a protrusion located on the UK holder (UKH) is coupled.

[0090] 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 protrusion, 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.

[0091]

[0092] Fig. 14 is a perspective view of a top view of an electrode cutting device for an all-solid-state battery according to embodiments of the present invention. Referring to Fig. 14, the top view (UK) may include a first coupling hole (CH1) and a second coupling hole (CH2).

[0093] The first coupling hole (CH1) may be a hole formed on the upper portion of the UK and may be a hole fastened with a bolt. The first coupling hole (CH1) may include two to six 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.

[0094]

[0095] FIG. 15 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. 15, 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 coupling part (CP), 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.

[0096] 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).

[0097]

[0098] Fig. 16 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. 16, 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) rises upward after cutting the electrode material. That is, the stripper (STP) is provided 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.

[0099] Referring to Fig. 16, 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.

[0100]

[0101] Figures 17 to 19 are conceptual diagrams briefly illustrating an electrode cutting process of an electrode cutting device according to embodiments of the present invention. Referring to Figure 17, 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 an upwardly inclined shearing 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.

[0102] Referring to Fig. 17, the electrode (EP) continuously supplied from the electrode supply unit (ES) can be cut into a certain size by an electrode cutting device located on the electrode supply unit (ES).

[0103]

[0104] Fig. 18 is a front view of an electrode cutting device according to an embodiment of the present invention. Referring to Fig. 18, the upper surface (UK) may have a symmetrical structure with respect to a first direction (D1), or may have an asymmetrical structure if the shear angles of both ends are different. The second direction (D2) is orthogonal to the first direction (D1) and the third direction (D3) and is parallel to the direction parallel to the electrode (EP). The first direction (D1) may be a direction penetrating the center of the upper surface (UK).

[0105] The UK moves along the first direction (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, when the UK holder (UKH) moves the UK from upward to downward, it is desirable for a separate power device to apply power to increase the kinetic energy. Such a separate power device may include, but is not limited to, various devices such as a hydraulic or pneumatic press, an electric motor, etc.

[0106] 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.

[0107]

[0108] Fig. 19 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. 19, 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.

[0109] Referring to FIGS. 15 and 19, 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 direction (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.

[0110] 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.

[0111]

[0112] 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.

[0113]

[0114] Example 1

[0115] A surface with a shear angle of 1° was produced, and an electrode cutting device was manufactured by combining this surface with a surface holder to cut the cathode. At this time, the length of the surface land portion was 0.5 mm.

[0116]

[0117] Example 2

[0118] 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. At this time, the length of the 3° land portion was 0.5 mm.

[0119]

[0120] Example 3

[0121] A 1° shear angle was created, and an electrode cutting device was created by combining the 1° shear angle with a 1° shear angle holder to cut the positive electrode. The length of the 1° shear angle land was 0.5 mm.

[0122]

[0123] Example 4

[0124] A 3° shear angle was created, and an electrode cutting device was created by combining the 3° shear angle with a 3° shear angle holder to cut the positive electrode. At this time, the length of the 3° shear angle land was 0.5 mm.

[0125]

[0126] Example 5

[0127] A plate with a shear angle of 0.5° and a length of 0.1 mm was produced, and an electrode cutting device was manufactured by combining the plate with a plate holder to cut the cathode.

[0128]

[0129] Example 6

[0130] A plate with a shear angle of 1° and a length of 0.1 mm was produced, and an electrode cutting device was produced by combining the plate with a plate holder to cut the cathode.

[0131]

[0132] Example 7

[0133] A plate with a shear angle of 1° and a length of 0.5 mm was produced, and an electrode cutting device was produced by combining the plate with a plate holder to cut the cathode.

[0134]

[0135] Example 8

[0136] A plate with a shear angle of 3° and a length of 0.1 mm was produced, and an electrode cutting device was manufactured by combining the plate with a plate holder to cut the cathode.

[0137]

[0138] Example 9

[0139] A plate with a shear angle of 3° and a length of 0.5 mm was produced, and an electrode cutting device was produced by combining the plate with a plate holder to cut the cathode.

[0140]

[0141] Example 10

[0142] A plate with a shear angle of 3° and a length of 1 mm on the plate land was manufactured, and an electrode cutting device was manufactured by combining the plate with a plate holder to cut the cathode.

[0143]

[0144] Comparative Example 1

[0145] A shear angle-free surface was produced, and an electrode cutting device was manufactured by combining this surface with a surface holder to cut the cathode. At this time, the length of the surface land was 0.5 mm.

[0146]

[0147] Comparative Example 2

[0148] A plate without a plate land was manufactured, and an electrode cutting device was manufactured by combining this plate with a plate holder to cut the cathode. At this time, the shear angle was 0.5°.

[0149]

[0150] Comparative Example 3

[0151] A 0.5 mm long slab was manufactured, and after attaching it to 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. At this time, the shear angle was 0.5°.

[0152]

[0153] Comparative Example 4

[0154] A 0.5 mm long slab was manufactured, and after attaching it to 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. At this time, the shear angle was 0.5°.

[0155]

[0156] Comparative Example 5

[0157] A plate with a shear angle of 0.5° and a length of 0.5 mm was produced, and an electrode cutting device was produced by combining the plate with a plate holder to cut the cathode.

[0158]

[0159] Comparative Example 6

[0160] A plate with a shear angle of 0.5° and a length of 1 mm on the plate land was manufactured, and an electrode cutting device was manufactured by combining the plate with a plate holder to cut the cathode.

[0161]

[0162] Comparative Example 7

[0163] A plate with a shear angle of 0.3° and a length of 1 mm on the plate land was manufactured, and an electrode cutting device was manufactured by combining the plate with a plate holder to cut the cathode.

[0164]

[0165] Evaluation Example 1: Degree of detachment during electrode cutting according to shear angle size

[0166] 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.

[0167] 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 7 and the horizontal line in the longitudinal direction of the upper drawing.

[0168]

[0169] Example Shear angle (θ) Electrode base material cutting height (H, mm) Shear force P (kgf) Example 11 Cathode 1.06 12 2 14.4 13 1 Example 23 Cathode 3.18 4 2 10 7.2 0 6 5 Example 31 Anode 1.00 5 3 2 18.1 7 4 7 Example 43 Anode 3.01 6 10 9.0 8 7 3 Comparative Example 1 None Cathode 0 4 5 8.4 4 9 0

[0170] As shown in Table 1, it can be confirmed that the electrode cutting devices of Examples 1 and 2 have a reduced shear force compared to the electrode cutting device of Comparative Example 1. In particular, when Examples 1 and 2 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 2 and 4, 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 3 and 4 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.

[0171]

[0172] Evaluation Example 2: Detachment level during electrode cutting according to the length of the sand land

[0173] The degree of detachment when the cathode was cut using the electrode cutting device manufactured in Comparative Examples 2 to 4 is shown in Table 2.

[0174]

[0175] Example Land area (mm) Pressure (MPa) Detachment (μm) Comparative example 200 micro-cut Comparative example 30.50.1405.05 Comparative example 40.50.2342.83

[0176] 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.

[0177] Evaluation Example 3: Detachment level during electrode cutting according to the length of the land surface for the shear angle

[0178] The degree of detachment when the cathode was cut using the electrode cutting device manufactured in Examples 5 to 10 and Comparative Examples 5 to 7 is shown in Table 3.

[0179]

[0180] Example Land part (mm) / Shear angle (°) Detachment (μm) Example 50.285.38~89.97 Example 60.1 Not performed Example 70.5 Not performed Example 80.0380 Example 90.16782 Example 100.3379 Comparative Example 51332.87 Comparative Example 62332.87 Comparative Example 733332.87

[0181] Referring to Table 3, when comparing Examples 5, 7, 9 and 10 with Examples 6 and 8 and Comparative Examples 5 to 7, it can be confirmed that detachment increases when the ratio of the length of the land portion to the shear angle exceeds the range of 0.15 mm / ° or more and less than 1 mm / °.

[0182] 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 drawing holder, a drawing and a joining section; 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 shear blade that slopes upward at a shear angle θ from one end of the lower part to the other end, The above-mentioned shear blade includes the upper land portion, An electrode cutting device for an all-solid-state battery, wherein the ratio of the length of the land portion to the shear angle θ is 0.15 mm / ° or more and less than 1 mm / °.

2. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein the above shear angle θ is 0.5° to 5°.

3. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein the above-mentioned land portion has a length of 0.5 mm to 5 mm.

4. 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 surface of the upper surface and one surface of the lower surface intersect.

5. 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.

6. In paragraph 1, The above-mentioned connecting portion is composed of a first connecting hole and a second connecting hole that are connected to the above-mentioned holder, An electrode cutting device for an all-solid-state battery, wherein the first coupling hole is fastened to the holder with a bolt.

7. In paragraph 6, An electrode cutting device for an all-solid-state battery, wherein the first coupling hole and the second coupling hole are incompletely coupled with the holder.

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

9. In paragraph 1, An electrode cutting device for an all-solid-state battery, wherein the lateral pressure of the above-mentioned pressure regulator is 0.05 MPa to 0.2 MPa.

10. A cutting section including a drawing holder, a drawing and a joining section; A top-down adjustment unit located on the side of the top-down; and Including the lower part, The above-mentioned diagram includes a first shear blade and a second shear blade having different shear angles, The first shear blade is inclined upward at a shear angle θ1 and includes a first upper surface land portion, The second shear blade is inclined upward at a shear angle θ2 and includes a second upper surface land portion, The above θ1 is smaller than the above θ2, An electrode cutting device for an all-solid-state battery, wherein the ratio of the length of the first phase land portion to the above θ1 is greater than the ratio of the length of the second phase land portion to the above θ1.

11. In paragraph 10, The ratio of the length of the first phase land portion to the above θ1 is 0.1 mm / ° or more and less than 1 mm / °, An electrode cutting device for an all-solid-state battery, wherein the ratio of the length of the second phase land portion to the above θ2 is 0.15 mm / ° or more and less than 1 mm / °.

12. In paragraph 10, An electrode cutting device for an all-solid-state battery, wherein the above θ1 is 0.5° to 1°.

13. In paragraph 10, An electrode cutting device for an all-solid-state battery, wherein the above θ2 is 1° to 4°.

14. In paragraph 10, An electrode cutting device for an all-solid-state battery, wherein at least one of the first phase land portion and the second phase land portion has a length of 0.5 mm to 5 mm.

15. In paragraph 10, 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.

16. In paragraph 10, 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.

17. In paragraph 10, The above-mentioned connecting portion is composed of a first connecting hole and a second connecting hole that are connected to the above-mentioned holder, An electrode cutting device for an all-solid-state battery, wherein the first coupling hole is fastened to the holder with a bolt.

18. In paragraph 17, An electrode cutting device for an all-solid-state battery, wherein the first coupling hole and the second coupling hole are incompletely coupled with the holder.

19. In paragraph 10, An electrode cutting device for an all-solid-state battery, further comprising a stripper positioned between the upper and lower electrodes and separating the electrode from the upper and lower electrodes.

20. In paragraph 10, An electrode cutting device for an all-solid-state battery, wherein the lateral pressure of the above-mentioned pressure regulator is 0.05 MPa to 0.5 MPa.

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