Electrode sheet cutting device and method of operating electrode sheet cutting device by using same

Abstract

An electrode sheet cutting device and a method of operating an electrode sheet cutting device by using same are disclosed. In an embodiment of the present invention, in order to minimize deformation at a cut surface when cutting an electrode sheet, an upper cutter and a lower cutter are engaged with each other and a cutting position is varied so that stable cutting is always performed.

Description

Cutting device for electrode sheets and operating method of cutting device for electrode sheets using the same

[0001] This embodiment is intended to stably cut a cutting surface to improve cutting quality when cutting an electrode sheet, and more specifically, relates to a cutting device for an electrode sheet and an operating method of a cutting device for an electrode sheet using the same.

[0002] Recently, compact and lightweight portable electrical / electronic devices such as cell phones, laptop computers, and camcorders have been actively developed and produced. These portable electrical / electronic devices incorporate built-in battery packs to enable operation even in locations without a separate power source. Built-in battery packs contain at least one battery capable of outputting a certain level of voltage to power the portable electrical / electronic device for a certain period of time.

[0003] The aforementioned battery packs have recently adopted rechargeable secondary batteries for economic reasons. Representative examples of secondary batteries include nickel-cadmium (Ni-Cd) batteries, nickel-metal hydride (Ni-MH) batteries, lithium (Li) batteries, and lithium-ion (Li-ion) batteries.

[0004] In particular, lithium secondary batteries have an operating voltage of 3.6 V, which is three times higher than nickel-cadmium batteries or nickel-hydrogen batteries, which are widely used as power sources for portable electronic devices, and are rapidly expanding due to their high energy density per unit weight.

[0005] Typically, the lithium secondary battery is composed of an electrode assembly including a positive electrode plate coated with a positive active material, a negative electrode plate coated with a negative active material, and a separator wound between the positive electrode plate and the negative electrode plate to prevent short circuiting and only allow movement of lithium ions (Li-ions), a lithium secondary battery case that accommodates the electrode assembly, and an electrolyte that is injected into the inside of the lithium secondary battery case to allow movement of lithium ions.

[0006] Electrode sheets for secondary batteries are unwound from a coiled roll and cut to a specific length to suit the battery's structure. The unwound electrode sheets are then transported at a constant pitch and then cut by a cutting unit. This cutting process must be performed in a short time without causing cutting defects.

[0007] The above electrode sheet is in the form of a thin film, and in order to perform a smooth cutting process, tension must be applied to the electrode so that the cutting action of the cutting blade can be performed smoothly.

[0008] The above cutting unit comprises an upper cutter, a lower cutter, and an actuator for lowering the upper cutter to the lower cutter.

[0009] When the actuator is operated, the upper cutter is lowered toward the lower cutter to cut the electrode sheet, and the cutting surface of the electrode sheet is not cut evenly, resulting in an uneven cutting state.

[0010] In this case, problems such as decreased productivity and increased manufacturing costs occurred, and countermeasures were needed.

[0011] Embodiments of the present invention aim to provide a cutting device for an electrode sheet, which improves the stability of cutting quality by starting cutting from both sides in the width direction of the electrode sheet when cutting the electrode sheet and then finally ending cutting at the central position, and an operating method of the cutting device for an electrode sheet using the same.

[0012] A cutting device for an electrode sheet according to the present embodiment includes a cam follower block (100) extended to a predetermined length; a guide post block (200) coupled to an upper surface of the cam follower block (100); a mount unit (300) coupled to an upper portion of the guide post block (200); a lower cutter (400) curved from an upper side of the cam follower block (100) toward the front of the cam follower block (100); and an upper cutter (500) installed on the front of the mount unit (300) and positioned to face the lower cutter (400) in an up-and-down position.

[0013] In the cam follower block (100), guide blocks (600) are coupled to the left and right sides of the lower cutter (400) so that when the upper cutter (500) is lowered toward the lower cutter (400) and the electrode sheet (2) is cut, the lower cutter (400) slides backward from the upper surface of the cam follower block (100).

[0014] The lower cutter (400) is coupled to a support block (410) at the rear and curved forward at a predetermined curvature; a tension adjusting member (10) is coupled from the rear to the front of the support block (410) so that the lower cutter (400) is coupled in close contact with the front of the support block (410).

[0015] The lower cutter (400) is characterized in that it is maintained in an elastically supported state by an elastic support member (700) installed at the rear of the support block (410) so as to return to its original position after moving along the guide block (600).

[0016] The front center of the above support block (410) facing the lower cutter (400) protrudes more than the front left and right sides.

[0017] The upper cutter (500) extends from the left and right ends in the width direction toward the lower cutter (400) with the upper cutter blade (510) inclined toward the center.

[0018] A vibration damper (800) is installed on the upper side of the above mount unit (300) to reduce vibration and shock generated when the upper cutter (500) is raised or lowered toward the lower cutter (400).

[0019]

[0020] An operating method of a cutting device for an electrode sheet according to one embodiment of the present invention comprises: a first step (ST100) in which an electrode sheet (2) is supplied between an upper cutter (500) and a lower cutter (400); a second step (ST200) in which the upper cutter (500) is lowered toward the lower cutter (400) to cut the electrode sheet (2); a third step (ST300) in which the upper cutter (500) is brought into point contact with the lower cutter (400) at a first position (P1); a fourth step (ST400) in which the lower cutter (400) is slidably moved on an upper surface of a base block (610) according to an amount of movement of the upper cutter (500) while the upper cutter (500) is continuously moved downward while being in point contact with the lower cutter (400); The fifth step (ST500) in which the upper cutter (500) is completely lowered toward the lower cutter (400) so that the upper cutter (500) makes point contact with the lower cutter (400) at a second position (P2); and the sixth step (ST600) in which the electrode sheet (2) is cut to completion, the upper cutter (500) returns to its original position, and the lower cutter (400) that has been slidably moved is slidably moved to its original position on the upper surface of the base block (610).

[0021] The second step (ST200) further includes a damping step (ST210) in which vibration and shock generated when the upper cutter (500) is raised or lowered toward the lower cutter (400) is reduced by a vibration damper (800) provided on the upper end of the mount unit (300).

[0022] The above third step (ST300) is characterized in that point contact is first made at the left end and right end positions of the lower cutter (400) by the upper cutter (500) when the lower cutter (400) is viewed from above.

[0023] The above lower cutter (400) is characterized in that it is combined with a support block (410) that is formed to be curved at a predetermined curvature toward the front, so that the front side is maintained in a state of being curved at a predetermined curvature toward the front.

[0024] In the fourth step (ST400), the left and right ends of the lower cutter (400) are partially inserted by the guide block (600), and the left and right ends of the lower cutter (400) are maintained at a predetermined gap with the inner side of the guide block (600).

[0025] The fourth step (ST400) includes a first support step (ST410) in which the left and right sides of the lower cutter (400) are supported so that they move only within a predetermined gap range with the inner side of the guide block (600) when the lower cutter (400) slides on the upper surface of the base block (610); a second support step (ST420) in which the lower cutter (400) is maintained in a supported state so that it does not move upward from the inner upper surface of the guide block (600); and a third support step (ST430) in which the lower cutter (400) is maintained in an elastically supported state by an elastic support member (700) installed at the rear of the support block (410) when it moves along the guide block (600).

[0026] In these embodiments, the upper cutter and the lower cutter are interlocked with each other to minimize deformation at the cutting surface when cutting the electrode sheet, thereby changing the cutting position to ensure stable cutting at all times.

[0027] The present embodiments prevent deformation of the upper cutter and the lower cutter even when repeatedly cutting the electrode sheet, and also improve the cutting quality of the electrode sheet, so that cutting can be performed accurately and stably, thereby improving the cutting quality.

[0028] The present embodiments enable the blades of the upper cutter and the lower cutter to be used without deformation even after the upper cutter has been used for a long period of time, thereby enabling continuous cutting operations without production interruption due to additional maintenance or work stoppage.

[0029] In the present embodiments, since the electrode sheet is cut in a point contact form, the cutting quality can always be constant and the work can be performed in a clean cutting state.

[0030] Fig. 1 is a perspective view of the assembly of a cutting device for an electrode sheet according to the present embodiment.

[0031] Figures 2 and 3 are drawings showing the combined state of the lower cutter and the guide block according to the present embodiment.

[0032] Fig. 4 is a drawing showing the arrangement of the cam guide and the upper cutter according to the present embodiment.

[0033] Figures 5 and 6 are drawings showing the state of coupling of the lower cutter and the support block according to the present embodiment.

[0034] Fig. 7 is a cross-sectional view showing the state of the lower cutter, the support block, and the elastic support part being joined according to the present embodiment.

[0035] Fig. 8 is a longitudinal cross-sectional view of a cutting device for an electrode sheet according to the present embodiment.

[0036] Figures 9 and 10 are operating state diagrams in which the upper cutter according to the present embodiment is lowered toward the lower cutter.

[0037] Fig. 11 is a drawing showing a state in which the upper cutter according to the present embodiment is completely lowered toward the lower cutter.

[0038] Fig. 12 is a perspective view showing a vibration damper provided in a cutting device for an electrode sheet according to the present embodiment.

[0039] Fig. 13 is a flowchart illustrating an operation method of a cutting device for an electrode sheet according to the present embodiment.

[0040] The advantages and features of the present disclosure, and methods for achieving them, will become clearer with reference to the embodiments described below in detail with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below, but may be implemented in various different forms. This disclosure is provided to fully inform those skilled in the art of the scope of the disclosure, and the disclosure is defined solely by the scope of the claims. Like reference numerals designate like elements throughout the specification.

[0041] When one component is referred to as being "connected to" or "coupled to" another component, it includes both cases where it is directly connected or coupled to the other component, or where there is another component intervening therebetween. Conversely, when one component is referred to as being "directly connected to" or "directly coupled to" another component, it indicates that there is no other component intervening therebetween. "And / or" includes each and any combination of one or more of the mentioned items.

[0042] The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting of the present disclosure. As used herein, the singular includes the plural unless the context clearly dictates otherwise. As used herein, the terms "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components, steps, operations, and / or elements.

[0043] Although terms like "first," "second," etc. are used to describe various components, these components are not limited by these terms. These terms are used only to distinguish one component from another.

[0044]

[0045] A cutting device for an electrode sheet according to an embodiment of the present invention will be described with reference to the drawings. For reference, FIG. 1 is a perspective view showing a combination of the cutting device for an electrode sheet according to the embodiment, FIGS. 2 and 3 are drawings showing a combination state of a lower cutter and a guide block according to the embodiment, FIG. 4 is a drawing showing an arrangement state of a cam guide and an upper cutter according to the embodiment, FIGS. 5 and 6 are drawings showing a combination state of a lower cutter and a support block according to the embodiment, FIG. 7 is a cross-sectional view showing a combination state of a lower cutter, a support block, and an elastic support member according to the embodiment, and FIG. 8 is a longitudinal cross-sectional view of the cutting device for an electrode sheet according to the embodiment.

[0046]

[0047] Referring to the attached drawings 1 to 8, a cutting device (1) for an electrode sheet according to the present embodiment includes a cam follower block (100) extended to a predetermined length, a guide post block (200) coupled to an upper surface of the cam follower block (100), a mount unit (300) coupled to an upper end of the guide post block (200), a lower cutter (400) curved toward the front of the cam follower block (100) from the upper side of the cam follower block (100), and an upper cutter (500) installed on the front of the mount unit (300) and arranged to face each other in an up-and-down position with the lower cutter (400).

[0048] In this embodiment, when the electrode sheet (2) is cut, the upper cutter (500) and the lower cutter (400) make point contact to cut. In particular, when the upper cutter (500) is lowered, the cutting of the electrode sheet (2) begins when point contact is made on both the left and right sides of the lower cutter (400), and finally, the cutting ends when point contact is made with the lower cutter (400) at the center position of the upper cutter (500).

[0049] In this case, the electrode sheet (2) can always be cut with a consistent and clean cutting surface, thereby improving the cutting quality.

[0050] A cutting device (1) for an electrode sheet has a cam follower block (100) positioned based on the front, a post block (200) positioned at the upper edge of the cam follower block (100), and a mount unit (300) positioned facing the cam follower block (100) vertically.

[0051] In the cam follower block (100), guide blocks (600) are coupled to the left and right sides of the lower cutter (400) so that when the upper cutter (500) is lowered toward the lower cutter (400) and the electrode sheet (2) is cut, the lower cutter (400) slides backward from the upper surface of the cam follower block (100).

[0052] The above guide block (600) is positioned on the left and right sides of the lower cutter (400) when looking at the cutting device (1) for the electrode sheet from the front based on the drawing.

[0053] The above guide block (600) requires a fine gap in the X-axis direction with the electrode sheet (2) to ensure stable cutting when the upper cutter (500) is lowered toward the lower cutter (400) to cut the electrode sheet (2).

[0054] If there is no gap between the electrode sheet (2) and the X-axis direction, the cut surface may not be cut cleanly and accurately, but may be cut unevenly or deformed. In order to prevent this, in the present embodiment, the lower cutter (400) needs to slide backward from the upper surface of the cam follower block (100) in the X-axis direction by the upper cutter (500).

[0055] In this embodiment, the guide block (600) is configured for this purpose, and the guide block (600) includes a base block (610) coupled to the lower side of the lower cutter (400), a first guide block (620) coupled to the left side of the base block (610), and a second guide block (630) coupled to the right side, respectively.

[0056] The above base block (610) is fixedly connected to the lower cutter (400) so that it moves together when the lower cutter (400) moves rearward in the X-axis direction. The above base block (610) is formed with a first protrusion (612) partially inserted into the inside of the first guide block (620), and a second protrusion (614) partially inserted into the second guide block (630).

[0057] The first guide block (620) and the second guide block (630) are fixed to the cam follower block (100), and only the base block (610) moves in the X-axis direction. To this end, in the present embodiment, the first guide block (620) has a first insertion groove (621) formed on the inside, and the second guide block (630) has a second insertion groove (631).

[0058] As shown in the drawing, the first insertion groove (621) is formed with a predetermined length on the inside of the first guide block (620), and the first protrusion (612) is inserted into the first insertion groove (621) and coupled thereto.

[0059] The above base block (610) has a clearance formed in the width direction in the first insertion groove (621) to ensure stable movement in the X-axis direction, so that it moves rearward momentarily when the electrode sheet (2) is cut in the X-axis direction.

[0060] In addition, the first protrusion (612) is maintained in close contact with the inner surface of the first guide block (620) in the Y-axis direction of the first insertion groove (621), so that lifting is prevented and stable movement is achieved with play maintained only in the X-axis direction.

[0061] For reference, the second guide block (630) has the same structure as the first guide block (620), and a second protrusion (622) is coupled to the second insertion groove (631), and a gap is formed in the width direction in the second insertion groove (631), so that the electrode sheet (2) moves rearward momentarily when cut in the X-axis direction.

[0062] In addition, the second protrusion (622) is maintained in close contact with the inner surface of the second guide block (630) in the Y-axis direction of the second insertion groove (631), so that lifting is prevented and stable movement is achieved with play maintained only in the X-axis direction.

[0063] The cam follower block (100) above has cam guides (50) installed on both left and right sides to guide the position so that the upper cutter (500) is always lowered toward the fixed position in the X-axis direction. The cam guide (50) includes a guide roller (52) that makes rolling contact with the front surface of the upper cutter (500), and a guide bracket (54) for fixing the guide roller (52).

[0064] The above guide roller (52) makes contact in the X-axis and Y-axis directions on both the left and right sides of the front of the upper cutter (500), thereby preventing the upper cutter (500) from changing its position, and always guides it to descend in a straight line in the Y-axis direction, thereby preventing change in position due to repeated raising and lowering, thereby maintaining the cutting quality of the electrode sheet (2) constant.

[0065] The upper cutter (500) is formed with an extension (520) extending downward at a predetermined length from the left and right positions to make contact with the guide roller (52). The extension (520) extends to the length shown in the drawing and makes contact with the guide roller (52) when lifting or lowering is performed.

[0066]

[0067] The lower cutter according to this embodiment is described.

[0068] The lower cutter (400) is coupled from the rear, and a support block (410) is curved forward with a predetermined curvature, and a tension adjusting member (10) is coupled from the rear to the front of the support block (410) so that the lower cutter (400) is coupled in close contact with the front of the support block (410).

[0069] The lower cutter (400) may be composed of a superalloy or another material having a similar strength to maintain strength. Since it is difficult to manufacture the lower cutter (400) in a state in which it is curved toward the front of the cam follower block (100), in this embodiment, the support block (410) on which the lower cutter (400) is installed is manufactured to be curved as shown in the drawing, and then the tension adjusting member (10) is coupled to the lower cutter (400) via the support block (410) so that the front surface of the lower cutter (400) is curved and coupled at the curvature shown in the drawing.

[0070] For reference, the protrusion length of the central portion of the lower cutter (400) protrudes 0.015 mm from the left and right ends, but is not necessarily limited to the above dimensions and may be varied in various ways.

[0071] In this case, the lower cutter (400) is stably maintained in a state of being in close contact with the front surface of the support block (410) by the tension adjusting member (10). The tension adjusting member (10) is, for example, a bolt, but may be variously changed to other configurations, and the curved curvature of the lower cutter (400) is not limited to the curvature illustrated in the drawing and may be variously changed.

[0072] The front (front) center of the above support block (410) facing the lower cutter (400) protrudes more than the front left and right sides.

[0073] When the above support block (410) is configured in this manner, the lower cutter (400) also maintains a state in which the front center protrudes more than the left and right sides, so that when the upper cutter (500) described later is lowered, the cutting stability for the electrode sheet (2) can be improved.

[0074] For example, the lower cutter (400) has the left and right ends corresponding to the first position (P1), and the most curved center corresponding to the second position (P2). The first position (P1) corresponds to the position where initial contact with the upper cutter (500) occurs, and the second position (P2) corresponds to the position where final contact with the upper cutter (500) ends.

[0075] That is, the upper cutter (500) cuts the electrode sheet (2) from the first position (P1), and finally, the cutting is completed at the second position (P2). A more detailed description of this will be provided when describing the upper cutter (500).

[0076]

[0077] The lower cutter (400) is maintained in an elastically supported state by an elastic support member (700) installed at the rear of the support block (410) so as to return to its original position after moving along the guide block (600).

[0078] The above elastic support part (700) includes an elastic support block (710) positioned at a predetermined distance from the rear of the support block (410), and an elastic support member (720) partially inserted into the interior of the support block (410) from the rear of the elastic support block (710).

[0079] The above elastic support member (720) includes a support pin (721) partially inserted from the outside of the elastic support block (710) to the inside of the support block (410), a spring member (722) that elastically supports the support pin (721) toward the support block (410), and a separation prevention member (723) installed at the rear to prevent the spring member (722) from being separated to the outside of the elastic support block (710).

[0080] The spring member (722) above always presses the support pin (721) from the rear of the elastic support block (710) toward the front, so that the lower cutter (400) is constantly maintained in a state of not moving in the X-axis direction (rearward) before the upper cutter (500) is lowered.

[0081] And, when the upper cutter (500) is lowered toward the lower cutter (400) and a cut is made on the electrode sheet (2), the spring member (722) is elastically compressed while moving momentarily backward in the X-axis direction only when the upper cutter (500) comes into contact with the lower cutter (500).

[0082] And when the upper cutter (500) returns to the initial position before cutting, the lower cutter (400) presses the support block (410) forward in the X-axis direction by the elastic pressure of the spring member (722), so that the lower cutter (400) returns to the initial position.

[0083] In this way, when the lower cutter (400) is moved in the X-axis direction when in contact with the upper cutter (500), damage and deformation of the blades of the lower cutter (400) and the upper cutter (500) can be prevented, and the cutting safety of the electrode sheet (2) is maintained consistently even during long-term use, thereby increasing production volume and improving work efficiency at the same time.

[0084] Accordingly, the lower cutter (400) can stably move and return from the initial position in the X-axis direction by the elastic support member (720).

[0085]

[0086] Referring to the attached drawings 9 to 11, the upper cutter (500) according to the present embodiment extends with the upper cutter blade (510) inclined from the left and right ends in the width direction toward the center toward the lower cutter (400). That is, when viewed from the front, the upper cutter (500) extends with an upward inclined direction from the left and right ends toward the center.

[0087] The reason why the upper cutter (500) is configured in this way is that when the upper cutter (500) is lowered toward the lower cutter (400) to cut the electrode sheet (2), the initial cutting position of the electrode sheet (2) starts at the left end and right end positions of the electrode sheet (2), and the final cutting position ends at the center position of the upper cutter (500).

[0088] In this case, the cutter blade of the upper cutter (500) starts cutting simultaneously from both the left and right ends of the electrode sheet (2), so that the cutting points start at two locations. In addition, the lower cutter (400) is installed to be curved toward the front of the cam follower block (100), so that when the upper cutter (500) comes into contact with the lower cutter (400) at the first position (P1) described above, the lower cutter (400) is maintained in a state where it does not move backward in the X-axis direction.

[0089] And when the upper cutter (500) is lowered to the final lowering position toward the lower cutter (400), the blade of the upper cutter (500) comes into contact with the central position from the left end and right end positions of the electrode sheet (2), and at the same time, cutting is completed, and the lower cutter (400) is pushed backward in the X-axis direction due to the contact with the upper cutter (500).

[0090] In this case, the electrode sheet (2) is cut cleanly, and the upper cutter (500) and the lower cutter (400) do not cause interference between the blades, so that stable cutting can be achieved.

[0091] The above electrode sheet (2) is cut in a shape similar to the curved shape of the lower cutter (400) when the cut surface is viewed from the upper side.

[0092]

[0093] Referring to the attached drawing 12, a vibration damper (800) is installed on the upper side of the mount unit (300) to reduce vibration and shock generated when the upper cutter (500) is raised or lowered toward the lower cutter (400).

[0094] The above vibration damper (800) includes an installation bracket (810), a plurality of damper springs (820) built into the left and right sides of the installation bracket (810), and a vibration rubber (830) provided on the upper side of the damper springs (820).

[0095] The above installation bracket (810) has a bracket groove (712) formed on the inside, so that a connection jig (20) of a separately provided press unit (not shown) can be combined to facilitate automated cutting work on the electrode sheet (2) while the mount unit (300) is raised or lowered in the Y-axis direction.

[0096]

[0097] An operating method of a cutting device for an electrode sheet according to one embodiment of the present invention will be described with reference to the drawings.

[0098] Referring to the attached drawings 12 and 13, the operating method of the cutting device for electrode sheets according to the present embodiment comprises a first step (ST100) in which an electrode sheet (2) is supplied between an upper cutter (500) and a lower cutter (400), a second step (ST200) in which the upper cutter (500) is lowered toward the lower cutter (400) to cut the electrode sheet (2), a third step (ST300) in which the upper cutter (500) is brought into point contact with the lower cutter (400) at a first position (P1), a fourth step (ST400) in which the upper cutter (500) is continuously lowered while being in point contact with the lower cutter (400) and the lower cutter (400) slides on the upper surface of the base block (610) according to the amount of movement of the upper cutter (500), and a fourth step (ST400) in which the upper cutter (500) is moved downward while being continuously in point contact with the lower cutter (400) and the lower cutter (400) is moved according to the amount of movement of the upper cutter (500). The fifth step (ST500) in which the cutter (500) is completely lowered toward the lower cutter (400) and the upper cutter (500) makes point contact with the lower cutter (400) at a second position (P2), and the sixth step (ST600) in which the electrode sheet (2) is cut to completion and the upper cutter (500) returns to the initial position, and the lower cutter (400) that has been slidably moved is slidably moved to the initial position on the upper surface of the base block (610).

[0099] The above first to sixth steps (ST100 to ST600) can be implemented sequentially through an automated equipment unit. For example, a connection jig (20) of a press unit (not shown) is coupled to a vibration damper (800), and an automated cutting operation for an electrode sheet (2) can be easily performed while a mount unit (300) to be described later is raised or lowered in the Y-axis direction.

[0100] In this case, the present embodiment can automatically perform cutting on a large number of electrode sheets (2), thereby improving work efficiency, worker workability, and accurate cutting stability of the electrode sheets (2) at the same time.

[0101] The above electrode sheet (2) supply is inserted into the space between the upper cutter (500) and the lower cutter (400) (ST100), and when the upper cutter (500) is lowered toward the lower cutter (400) (ST200), vibration and shock generated when the upper cutter (500) is raised or lowered toward the lower cutter (400) are reduced through damping by the vibration damper (800) provided on the upper end of the mount unit (300) (ST210).

[0102] When the upper cutter (500) moves downward toward the lower cutter (400) and cuts the electrode sheet (2), vibration inevitably occurs due to the movement of the upper cutter (500), and an impact occurs due to contact with the lower cutter (500).

[0103] This embodiment can be used by minimizing vibration and noise through the vibration damper (800) described above so that vibration and impact resulting from movement of the upper cutter (500) are minimized.

[0104] When the upper cutter (500) moves downward toward the lower cutter (400), it comes into contact with the guide rollers (52) (see FIG. 1 or FIG. 4) on the front left and right sides, respectively.

[0105] The above guide roller (52) makes contact in the X-axis and Y-axis directions on both the left and right sides of the front of the upper cutter (500), thereby preventing the upper cutter (500) from changing its position, and always guides it to descend in a straight line in the Y-axis direction, thereby preventing change in position due to repeated raising and lowering, thereby maintaining the cutting quality of the electrode sheet (2) constant.

[0106]

[0107] In the third step (ST300) according to the present embodiment, as shown in FIGS. 5 to 6 and FIGS. 9 to 11, point contact is first made at the left and right ends of the lower cutter (400) by the upper cutter (500) when the lower cutter (400) is viewed from above.

[0108]

[0109] The above lower cutter (400) is combined with a support block (410) that is formed to be curved at a predetermined curvature toward the front, so that the front side is maintained in a state of being curved at a predetermined curvature toward the front, and thus, as described above, a point contact state is maintained when it comes into contact with the lower cutter (400).

[0110] The front (front) center of the above support block (410) facing the lower cutter (400) protrudes more than the front left and right sides.

[0111] When the above support block (410) is configured in this manner, the lower cutter (400) also maintains a state in which the front center protrudes more than the left and right sides, so that when the upper cutter (500) is lowered, the cutting stability for the electrode sheet (2) can be improved.

[0112] For example, the lower cutter (400) has the left and right ends corresponding to the first position (P1), and the most curved center corresponding to the second position (P2). The first position (P1) corresponds to the position where initial contact with the upper cutter (500) occurs, and the second position (P2) corresponds to the position where final contact with the upper cutter (500) ends.

[0113] That is, the upper cutter (500) cuts the electrode sheet (2) from the first position (P1), and finally, the cutting is completed at the second position (P2).

[0114]

[0115] Referring to the attached drawings 2 to 13, in the fourth step (ST400) according to the present embodiment, stable cutting of the electrode sheet (2) is achieved as the lower cutter (400) slides on the upper surface of the base block (610) according to the movement amount of the upper cutter (500). When the lower cutter (400) slides as described above, damage to the upper cutter (500) and the lower cutter (400) is prevented, and even when the electrode sheet (2) is cut through the upper cutter (500) for a long period of time, deterioration in the cutting quality of the electrode sheet (2) due to wear can be minimized.

[0116]

[0117] To this end, in this embodiment, the left and right ends of the lower cutter (400) are partially inserted by the guide block (600), and the left and right ends of the lower cutter (400) are maintained at a predetermined gap with the inside of the guide block (600).

[0118] The above guide block (600) requires a fine gap in the X-axis direction with the electrode sheet (2) to ensure stable cutting when the upper cutter (500) is lowered toward the lower cutter (400) to cut the electrode sheet (2).

[0119] If there is no gap between the lower cutter (400) and the electrode sheet (2) in the width direction, the cut surface of the electrode sheet (2) is not cut cleanly and accurately, and may be cut unevenly or deformed, so that a gap is formed at a predetermined interval.

[0120] Since the lower cutter (400) is maintained in a fixedly coupled state with the base block (610), when the lower cutter (400) slides, it can be stably moved in the X-axis direction (see FIG. 1) on the upper surface of the cam follower block (100).

[0121] The fourth step (ST400) includes a first support step (ST410) in which the left and right sides of the lower cutter (400) are supported so that they move only within a predetermined gap range with the inner side of the guide block (600) when the lower cutter (400) slides on the upper surface of the base block (610), a second support step (ST420) in which the lower cutter (400) is maintained in a supported state so that it does not move upward from the inner upper surface of the guide block (600), and a third support step (ST430) in which the lower cutter (400) is maintained in an elastically supported state by an elastic support member (700) installed at the rear of the support block (410) when it moves along the guide block (600).

[0122]

[0123] In the above first support step (ST410), when the lower cutter (400) slides, the lower cutter (400) is supported so that it moves only in the gap formed between the first insertion groove (621) and the second insertion groove (631) in the first guide block (620) provided on the left side of the base block (610) and the second guide block (630) provided on the right side.

[0124] In this case, the lower cutter (400) moves stably even when it is slid by the upper cutter (500), and can slide steadily without being eccentric to a specific position, so that the movement stability and directionality are stably maintained.

[0125] The above second support step (ST420) is intended to prevent the lower cutter (400) from moving vertically upward during the slide movement, thereby preventing deformation of the electrode sheet (2) due to the downward movement of the upper cutter (500), thereby maintaining a constant cutting quality and preventing deterioration of the quality of the electrode sheet (2).

[0126] In addition, the lower cutter (400) is prevented from moving vertically upward toward the upper cutter (500), thereby preventing wear and deformation due to interference between the upper cutter (500) and the lower cutter (400), thereby improving durability even when used for a long period of time.

[0127] The above third support step (ST430) means that after the sliding movement of the lower cutter (400) and the cutting of the electrode sheet (2) are completed, the lower cutter (400) returns to its original position.

[0128] Since the above-described elastic support member (700) is pressed forward from the rear of the elastic support block (710) through the aforementioned spring member (722), the lower cutter (400) is also maintained in the initial position before the upper cutter (500) is lowered.

[0129] And when the upper cutter (500) is lowered toward the lower cutter (400), the spring member (722) is elastically compressed and deformed while moving momentarily backward in the X-axis direction, and when the upper cutter (500) returns to the initial position before cutting, the lower cutter (400) presses the support block (410) forward in the X-axis direction by the elastic pressure of the spring member (722), so that the lower cutter (400) returns to the initial position.

[0130] Accordingly, the lower cutter (400) can stably move and return from the initial position in the X-axis direction by the elastic support member (720).

[0131]

[0132] In the fifth step (ST500) according to the present embodiment, the upper cutter (500) is completely lowered toward the lower cutter (400) to make point contact at a second position (P2). The second position (P2) corresponds to the exact center position of the lower cutter (400), and the electrode sheet (2) is cut from the first position (P1) (the left and right ends of the lower cutter) to the second position (P2).

[0133] The electrode sheet (2) is cut by the upper cutter (500) and the lower cutter (400) when point contact is made on the left and right sides at the first position (P1) and then the contact is terminated at the second position (P2).

[0134] That is, the electrode sheet (2) is not cut at once, but the cutting direction moves from the first position (P1) toward the second position (P2) toward the center of the electrode sheet (2) while the lower cutter (400) and the upper cutter (500) are in point contact.

[0135] When the above electrode sheet (2) is cut in this way, the cutting surface is cut accurately regardless of the location, and the phenomenon of the cutting surface being cut unstably at a specific location is prevented.

[0136]

[0137] In the sixth step (ST600) according to the present embodiment, when the upper cutter (500) returns to the initial position after lowering the lower cutter (400), the support block (410) is pressed to the initial position by the elastic pressure of the spring member (722) described above, thereby returning the lower cutter (400) to the initial position.

[0138] In this way, the lower cutter (400) slides together with the support block (410) according to a series of processes in which the upper cutter (500) is lowered toward the lower cutter (400) and then returned to its original position, so that the cutting surface for the electrode sheet (2) is cleanly cut, and interference between the blades of the upper cutter (500) and the lower cutter (400) is prevented, so that stable cutting can be achieved.

[0139]

[0140] The present embodiments can provide a cutting device for an electrode sheet that can accurately cut the electrode sheet and maintain a consistent cutting quality.

Claims

1. Cam follower block (100) extended to a predetermined length; A guide post block (200) coupled to the upper side of the cam follower block (100); A mount unit (300) coupled to the top of the above guide post block (200); A lower cutter (400) curved toward the front of the cam follower block (100) from the upper side of the cam follower block (100); and A cutting device for an electrode sheet, which is installed on the front of the above mount unit (300) and includes an upper cutter (500) positioned facing each other in an upper-lower position with the lower cutter (400).

2. In paragraph 1, A cutting device for an electrode sheet, in which guide blocks (600) are coupled to the left and right sides of the lower cutter (400) so that when the upper cutter (500) is lowered toward the lower cutter (400) and the electrode sheet (2) is cut, the lower cutter (400) slides rearward from the upper surface of the cam follower block (100).

3. In paragraph 2, The lower cutter (400) is coupled at the rear and has a support block (410) curved at a predetermined curvature toward the front; A cutting device for a sheet in which a tension adjusting member (10) is coupled from the rear to the front of the support block (410) so that the lower cutter (400) is closely coupled to the front of the support block (410).

4. In paragraph 3, The above lower cutter (400) is a cutting device for an electrode sheet that is maintained in an elastically supported state by an elastic support member (700) installed at the rear of the support block (410) so as to return to the initial position after moving along the guide block (600).

5. In paragraph 4, The above support block (410) is a cutting device for an electrode sheet whose front center facing the lower cutter (400) protrudes more than the front left and right sides.

6. In paragraph 1, The upper cutter (500) is a cutting device for an electrode sheet in which the upper cutter blade (510) is extended from the left and right ends in the width direction toward the center toward the lower cutter (400).

7. In paragraph 1, A cutting device for an electrode sheet, wherein the mount unit (300) is positioned on the upper side and a vibration damper (800) is installed to reduce vibration and shock generated when the upper cutter (500) is raised or lowered toward the lower cutter (400).

8. The first stage (ST100) in which the electrode sheet is supplied between the upper cutter and the lower cutter; A second step (ST200) in which the upper cutter is lowered toward the lower cutter to cut the electrode sheet; A third step (ST300) in which the upper cutter makes point contact with the lower cutter at a first position (P1); A fourth step (ST400) in which the upper cutter continues to move downward while in point contact with the lower cutter, and the lower cutter slides on the upper surface of the base block according to the amount of movement of the upper cutter; A fifth step (ST500) in which the upper cutter is completely lowered toward the lower cutter and the upper cutter makes point contact with the lower cutter at a second position (P2); and An operating method of a cutting device for an electrode sheet, comprising a sixth step (ST600), in which the electrode sheet is cut to completion, the upper cutter returns to the initial position, and the lower cutter, which has been moved by sliding, slides to the initial position on the upper surface of the base block.

9. In paragraph 8, The second step (ST200) further includes a damping step (ST210) in which vibration and shock generated when the upper cutter is raised or lowered toward the lower cutter are reduced by a vibration damper provided on the upper end of the mount unit. An operating method of a cutting device for an electrode sheet.

10. In paragraph 8, The above third step (ST300) is an operating method of a cutting device for an electrode sheet in which point contact is first made at the left end and right end positions of the lower cutter by the upper cutter when the lower cutter is viewed from above.

11. In paragraph 8, An operating method of a cutting device for an electrode sheet in which the lower cutter is combined with a support block formed to be curved at a predetermined curvature toward the front, so that the front side is maintained in a state of being curved at a predetermined curvature toward the front.

12. In paragraph 8, The fourth step is an operating method of a cutting device for an electrode sheet in which the left and right sides of the lower cutter are partially inserted into the guide block and the left and right sides of the lower cutter are maintained at a predetermined gap from the inside of the guide block.

13. In paragraph 12, The fourth step is a first support step (ST410) that supports the left and right sides of the lower cutter so that they move only within a preset gap range with the inner side of the guide block when the lower cutter slides on the upper surface of the base block; A second support step (ST420) in which the lower cutter is maintained in a supported state so as not to move upward from the inner upper surface of the guide block; An operating method of a cutting device for an electrode sheet, comprising a third support step (ST430) in which the lower cutter is maintained in an elastically supported state by an elastic support member installed at the rear of the support block when the lower cutter moves along the guide block.

Images