Patent Publication Number: US-2023158701-A1

Title: Electrode Cutting Device and Method and Electrode Manufacturing Apparatus Comprising the Same

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application is a national stage entry under 35 U.S.C. §371 of International Application No. PCT/KR2021/008980 filed on Jul. 13, 2021 which claims priority from Korean Patent Application Nos. 10-2020-0087127, filed on Jul. 14, 2020, and 10-2021-0089217, filed on Jul. 07, 2021, which are hereby incorporated by reference in their entirety. 
    
    
     TECHNICAL FIELD 
     The present invention relates to an electrode cutting device and method, which simplify a cutting process for an electrode sheet, and an electrode manufacturing apparatus comprising the same. 
     BACKGROUND ART 
     In general, secondary batteries refer to chargeable and dischargeable batteries, unlike primary batteries that are not chargeable. Such a secondary battery is being widely used in the high-tech electronic fields such as mobile phones, notebook computers, and camcorders. 
     Such a secondary battery is classified into a can type secondary battery in which an electrode assembly is built in a metal can and a pouch type secondary battery in which an electrode assembly is built in a pouch. The pouch type secondary battery comprises an electrode assembly in which an electrode and a separator are alternately stacked, an electrolyte, and a pouch accommodating the electrode assembly and the electrolyte. Also, the pouch comprises an accommodation part accommodating the electrode assembly and an electrolyte and a sealing part sealing the accommodation part. 
     An electrode is manufactured by cutting an electrode sheet comprising a coating portion and a non-coating portion at regular intervals. That is, an electrode manufacturing method comprises a process of transferring an electrode sheet, a processing process of notching a non-coating portion of the transferred electrode sheet to process an electrode tab, a full-width cutting process of cutting the electrode sheet between the electrode tabs to manufacture in a full-width direction to manufacture the electrode, and an edge cutting process of slopingly cutting an edge of the electrode. 
     However, in the electrode manufacturing method, since the full-width cutting process and the edge cutting process are separately performed, it takes a lot of work time, and in particular, there is a problem in that the edge of the electrode is not cut a certain size during the edge cutting process. 
     DISCLOSURE OF THE INVENTION 
     Technical Problem 
     The present invention is invented to solve the above problems, and an object of the present invention is to provide an electrode cutting device and method, in which a full-width cutting process and an edge cutting process are performed together to simplify a process, thereby significantly improving work efficiency, and in particular, an edge of the electrode is uniformly cut to prevent defects from occurring, and an electrode manufacturing apparatus comprising the same. 
     Technical Solution 
     An electrode cutting device according to the present invention for achieving the above object comprises: a die member on which an electrode sheet is disposed on a surface, on which a cutting line is partitioned; and a punch member configured to cut the electrode sheet disposed on the die member along the cutting line to manufacture an electrode, wherein the die member comprises: a disposition part which is provided at one side of the cutting line, on which the electrode sheet is disposed, and in which one end thereof disposed on the cutting line is formed as a disposition inclination surface to form a groove between the cutting line and the disposition inclination surface; a full-width cutting groove provided at the other side of the cutting line; and a V-shaped cutting groove provided on the cutting line and connected to the groove formed by the disposition inclination surface, wherein the punch member comprises: a full-width punch configured to cut the electrode sheet along the cutting line while being inserted into the full-width cutting groove, thereby manufacturing the electrode, wherein, since one end thereof corresponding to the disposition inclination surface is formed as a full-width inclination surface, an edge of the electrode disposed on the cutting line is cut to form an inclined surface; and a V-shaped punch configured to cut an edge of the electrode sheet disposed on the disposition inclination surface while being inserted into the V-shaped groove so as to form an inclined surface. 
     A reinforcing plate configured to improve strength and horizontality may be provided on a top surface of the disposition part. 
     The reinforcing plate may be coupled to a coupling groove formed in the disposition part, and a top surface of the reinforcing plate coupled to the coupling groove, an upper end surface of the full-width cutting groove, and an upper end surface of the V-shaped cutting groove may have the same height. 
     The electrode cutting device may further comprise a full-width support member configured to elastically support the electrode sheet disposed in the full-width cutting groove, wherein the full-width support member may comprise: a full-width support plate provided in the full-width cutting groove, provided to be movable in a direction of a bottom surface of the full-width cutting groove, and configured to elastically support the electrode sheet disposed in the full-width cutting groove; and a full-width elastic piece configured to provide elastic force to the full-width support plate so that the full-width support plate elastically supports the electrode sheet, wherein one end of the full-width support plate disposed on the cutting line is formed as the same inclined surface as the inclined surface of the full-width punch. 
     The electrode cutting device may further comprise a V-shaped support member configured to elastically support the electrode sheet disposed in the V-shaped cutting groove, wherein the V-shaped support member may comprise: a V-shaped support plate provided in the V-shaped cutting groove, provided to be movable in a direction of a bottom surface of the V-shaped cutting groove, and configured to elastically support the electrode sheet disposed in the V-shaped cutting groove; and a V-shaped elastic piece configured to provide elastic force to the V-shaped support plate so that the V-shaped support plate elastically supports the electrode sheet. 
     A cutting surface of the full-width punch configured to cut the electrode sheet and a cutting surface of the V-shaped punch may have different heights, and the cutting surface of the full-width punch may be provided to further protrude in a direction of the electrode sheet than the cutting surface of the V-shaped punch. 
     A full-width guide groove may be formed at one side of the full-width cutting groove, and a full-width guide protrusion movably inserted into the full-width guide groove may be formed on the full-width support plate. 
     A V-shaped guide groove may be formed at one side of the V-shaped cutting groove, and a V-shaped guide protrusion movably inserted into the V-shaped guide groove may be formed on the V-shaped support plate. 
     The electrode cutting device may further comprise a guide member configured to guide the punch member so as to descend or ascend vertically toward the die member. 
     The guide member may comprise: a lower guide plate on which the die member is installed; an upper guide plate on which the punch member is installed; and a guide rod provided on the lower guide plate and coupled to the upper guide plate to guide the upper guide plate so as to ascend or descend vertically toward the die member. 
     An electrode cutting method comprises: a disposition process of disposing an electrode sheet on a cutting line; and a punch process of cutting the electrode sheet along the cutting line to manufacture an electrode, wherein the punch process comprises a full-width cutting process of cutting an edge of one end of the electrode disposed on the cutting line together to form an inclined surface, and a V-shaped cutting process of cutting an edge of one end of the electrode sheet corresponding to the edge of the one end of the electrode to form an inclined surface. 
     The disposition process may comprise a first disposition process of disposing a portion of the electrode sheet, which is to be cut, on a cutting line that is partitioned between a disposition part and a full-width cutting groove and a second disposition process of disposing one end of the electrode sheet disposed on the cutting line in a V-shaped cutting groove of a die member, and in the punch process, a full-width punch of a punch member may be inserted into the full-width cutting groove to cut the electrode sheet along the cutting line, thereby manufacturing an electrode, wherein the punch process may comprise a full-width cutting process of cutting an edge of the electrode disposed on the cutting line together to form an inclined surface as an edge of the full-width punch disposed on the cutting line is formed as a full-width inclination surface, and a V-shaped cutting process of cutting an edge of the electrode sheet to form an inclined surface by inserting a V-shaped punch of the punch member into the V-shaped cutting groove. 
     In the first disposition process, a full-width support member may be provided in the full-width cutting groove to elastically support the electrode sheet disposed in the full-width cutting groove, and in the full-width cutting process, the full-width punch may cut the electrode sheet along the cutting line while being inserted into the full-width cutting groove in a state of pressing the electrode sheet disposed in the full-width cutting groove together with the full-width support member. 
     In the second disposition process, a V-shaped support member may be provided in the V-shaped cutting groove to elastically support the electrode sheet disposed in the V-shaped cutting groove, and in the V-shaped cutting process, the V-shaped punch may cut an edge of one end of the electrode sheet to form an inclined surface while being inserted into the V-shaped cutting groove in a state of pressing the electrode sheet disposed in the V-shaped cutting groove together with the V-shaped support member. 
     An electrode manufacturing apparatus according to the present invention comprises: a transfer device configured to transfer an electrode sheet, on which a non-coating portion is formed; a notching device configured to notch the non-coating portion of the electrode sheet transferred by the transfer device so as to process electrode tabs at regular intervals; and the electrode cutting device configured to cut the electrode sheet, on which the electrode tabs are processed by the notching device, so as to manufacture an electrode. 
     Advantageous Effects 
     The electrode cutting device according to the present invention may comprise the disposition part, the die member comprising the full-width cutting groove and the V-shaped cutting groove, and the punch member comprising the full-width punch and the V-shaped punch. Therefore, the electrode sheet disposed on the die member may be cut in the full-width direction through the punch member, and also, the cut surface may be cut in the V shape, and as a result, the electrode having the inclined edge may be manufactured to simplify the processes, thereby improving the work efficiency. Particularly, the edge of the electrode may be uniformly cut to prevent the defects from occurring. 
     In addition, in the electrode cutting device according to the present invention, the die member may comprise the reinforcing plate, and thus, the electrode sheet may be stably disposed on the die member without being damaged. 
     In addition, in the electrode cutting device according to the present invention, the reinforcing plate may be coupled to the coupling groove formed in the disposition part. Thus, the top surface of the reinforcing plate coupled to the coupling groove, the upper end surface of the full-width cutting groove, and the upper end surface of the V-shaped cutting groove may have the same height to prevent the meandering defect of the electrode sheet from occurring, thereby improving the cutting accuracy of the electrode sheet. 
     In addition, in the electrode cutting device, the full-width support member may be disposed in the full-width cutting groove. Thus, the electrode sheet may be cut in the state in which the full-width punch and the full-width support member elastically press the electrode sheet, thereby improving the cutting accuracy of the electrode sheet. 
     In addition, in the electrode cutting device, the V-shaped support member may be disposed in the V-shape cutting groove. Thus, the end of the cut surface of the electrode sheet disposed on the die member may be cut in the state in which the V-shaped punch and the V-shaped support member elastically press the end of the cut surface of the electrode sheet, thereby improving the cutting accuracy when the edge of the electrode is cut. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a perspective view of an electrode cutting device according to a first embodiment of the present invention. 
         FIG.  2    is a perspective view illustrating a die member of the electrode cutting device according to a first embodiment of the present invention. 
         FIG.  3    is a plan view of  FIG.  2   , 
         FIG.  4    is a perspective view illustrating a punch member of the electrode cutting device according to a first embodiment of the present invention. 
         FIG.  5    is a bottom view of  FIG.  4   . 
         FIG.  6    is a cross-sectional view taken along line A-A of  FIG.  1   . 
         FIG.  7    is a cross-sectional view taken along line B-B of  FIG.  1   . 
         FIG.  8    is a flowchart illustrating an electrode cutting method according to the first embodiment of the present invention. 
         FIG.  9    is a plan view illustrating a disposition process in the electrode cutting method according to the first embodiment of the present invention. 
         FIG.  10    is a cross-sectional view illustrating a full-width cutting process in a punch process of the electrode cutting method according to the first embodiment of the present invention. 
         FIG.  11    is a plan view illustrating the electrode cut after the full-width cutting process. 
         FIG.  12    is a cross-sectional view illustrating a V-shaped cutting process in the punch process of the electrode cutting method according to the first embodiment of the present invention. 
         FIG.  13    is a plan view illustrating the electrode cut after the V-shaped cutting process. 
         FIG.  14    is a plan view illustrating an electrode manufacturing apparatus according to a second embodiment of the present invention. 
     
    
    
     MODE FOR CARRYING OUT THE INVENTION 
     Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in such a manner that the technical idea of the present invention may easily be carried out by a person with ordinary skill in the art to which the invention pertains. The present invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, anything unnecessary for describing the present invention will be omitted for clarity, and also like reference numerals in the drawings denote like elements. 
     Electrode Cutting Device According to First Embodiment of the Present Invention 
     As illustrated in  FIGS.  1  to  7  and  11   , an electrode cutting device according to a first embodiment of the present invention comprises a die member  110 , on which an electrode sheet  10  is disposed on a surface on which a cutting line is partitioned, and a punch member  120  that cuts the electrode  10  disposed on the die member along the cutting line to manufacture an electrode  10 A. 
     The electrode sheet  10  comprises a coating portion provided with an electrode active material and an non-coating portion without the electrode active material, and the non-coating portion is processed into an electrode tab through a notching process. 
     In addition, the electrode sheet  10  on which the electrode tab is processed is transferred to the electrode cutting device according to the first embodiment of the present invention and then is cut into a certain size to be manufactured into the electrode  10 A comprising the electrode tab and the coating portion. 
     Die Member 
     The electrode sheet is disposed on the die member  110 . The die member  110  has a surface (a top surface when viewed in  FIG.  2   ) that comprises a disposition part  111  provided at one side with respect to the cutting line, a full-width cutting groove  112  provided at the other side with respect to the cutting line, and a V-shaped cutting groove  113  provided on the cutting line. 
     The disposition part  111  is provided at one side (a left side of the cutting line when viewed in  FIG.  3   ) of the cutting line α that is partitioned on the top surface of the die member  110  and is provided as a horizontal surface so that the electrode sheet  10  is disposed. 
     Here, one end (a lower edge of the disposition part disposed on the cutting line when viewed in  FIG.  3   ) of the disposition part  111  disposed on the cutting line α may have a disposition inclination surface  111   a , and thus, a groove may be formed between the cutting line α and the disposition inclination surface  111   a . A V-shaped punch may be inserted into the groove formed between the cutting line α and the disposition inclination surface  111   a  to cut an edge of the electrode sheet disposed on the cutting line so as to form an inclined surface. 
     The full-width cutting groove  112  is provided at the other side (a right side of the cutting line when viewed in  FIG.  3   ) of the cutting line α partitioned on the die member  110  and is formed as a groove having a predetermined depth. That is, the electrode sheet disposed in the full-width cutting groove  112  is disposed in a levitated state. In addition, the electrode sheet  10  disposed in the full-width cutting groove  112  may be elastically supported by a full-width support member to be described later. 
     The V-shaped cutting groove  113  is provided in the cutting line α (a lower end of the cutting line at which the disposition part  111  and the full-width cutting groove  112  meet each other) and is formed as a groove having a predetermined depth. The V-shaped cutting groove  113  is provided to be connected to the groove formed in the disposition inclination surface  111   a . That is, the electrode sheet  10  disposed in the V-shaped cutting groove  113  is disposed in a levitated state. In addition, the electrode sheet  10  disposed in the V-shaped cutting groove  113  may be elastically supported by a V-shaped support member to be described later. 
     The cutting line is partitioned in a full-width direction of the electrode sheet disposed on the die member. 
     Punch Member 
     The punch member  120  is configured to manufacture the electrode by cutting the electrode sheet disposed on the die member along the cutting line, and comprises a punch body  121 , a full-width punch  122 , and a V-shaped punch  123 . 
     The punch body  121  is provided above the die member  110  to descend or ascend toward the die member  110  as illustrated in  FIG.  1   . 
     The full-width punch  122  is provided on a bottom surface of the punch body  121  as illustrated in  FIG.  4    and is inserted into the full-width cutting groove  112  when the punch body  121  descends to cut the electrode sheet  10 , which is disposed on the cutting line α, along the cutting line α, thereby manufacturing the electrode. That is, referring to  FIG.  9   , the full-width punch  122  cuts the electrode sheet disposed on the cutting line in the full-width direction of the electrode sheet to manufacture the electrode. 
     One end of the full-width punch  122 , which corresponds to the disposition inclination surface  111   a  (a lower end of a left side of the full-width punch disposed on the cutting line when viewed in  FIG.  3   ) may be formed as a full-width inclination surface  122   a , and the full-width inclination surface  122   a  cuts an edge of the electrode  10 A disposed on the cutting line to form an inclined surface. 
     That is, the full-width punch  122  cuts the electrode sheet disposed on the die member along the cutting line to manufacture the electrode, and simultaneously, cuts the edge of the electrode  10 A disposed on the cutting line to form an inclined surface. In summary, the full-width punch  122  may cut the electrode sheet and the edge of the electrode at the same time, and as a result, the electrode  10 A of which the edge is cut to form the inclined surface may be manufactured. 
     The V-shaped punch  123  is provided on the bottom surface of the punch body  121  and cuts the edge of the electrode sheet disposed in the groove formed by the disposition inclination surface  111   a  while being inserted into the V-shaped cutting groove  113  to form an inclined surface. 
     In the electrode cutting device, which has the above-described structure, according to the first embodiment of the present invention, when the punch member  120  descends toward the die member  110  after the electrode sheet  10  is disposed on the die member  110 , while the full-width punch  122  of the punch member  120  is inserted into the full-width cutting groove  112 , the electrode sheet is cut along the cutting line, and simultaneously, the edge of the electrode disposed on the cutting line is cut to form the inclined surface, and then, the V-shaped punch  123  of the punch member  120  cuts the edge of the electrode sheet disposed on the cutting line while being inserted into the V-shaped cutting groove  113 . 
     Therefore, the electrode cutting device according to the first embodiment of the present invention may manufacture the electrode having the inclined edge through one cutting process, and thus, the cutting process may be simplified to improve work efficiency, and in particular, the cutting accuracy may be improved to prevent defects from occurring. 
     The electrode cutting device according to the first embodiment of the present invention may comprise a reinforcing plate  114  on a top surface of the disposition part  111 . The reinforcing plate  114  has a flat top surface on which the electrode sheet is disposed and has strength greater than that of the disposition part. Thus, the disposition part may increase in horizontality. Particularly, the reinforcing plate  114  may be detachably coupled to the disposition part  111  to improve ease of maintenance. Particularly, since the reinforcing plate  114  has strength greater than that of the die member  110 , the reinforcing plate  114 , the reinforcing plate  114  may be prevented from being easily damaged by an external impact or a punching operation. 
     One end of the reinforcing plate  114  may be disposed to match the cutting line α, and thus, a cutting point and position of the electrode sheet may be more clearly identified. 
     The reinforcing plate  114  may be coupled to the disposition part  111  to slidably move in a direction toward or opposite to the cutting line α. Thus, when an end of the reinforcing plate  114  and the cutting line α do not match, the position of the reinforcing plate  114  may be adjusted to allow the end of the reinforcing plate  114  to match the cutting line α. Particularly, the position of the reinforcing plate  114  may be arbitrarily adjusted to change the position of the cutting line α. 
     The reinforcing plate  114  is coupled to the coupling groove  115  formed in the disposition part  111 , in particular, a top surface of the reinforcing plate  114 , an upper end surface of the full-width cutting groove  112 , and an upper end surface of the V-shaped cutting groove  113  have the same height when viewed with respect to the electrode sheet. Thus, the horizontality of the electrode sheet  10  disposed on the die member may increase, and as a result, the cutting accuracy when punching the electrode sheet  10  may be improved. 
     The reinforcing plate  114  may be coupled to the coupling groove  115  so as to be adjustable in height in a direction of the bottom surface of the coupling groove  115  or in a direction opposite to the bottom surface of the coupling groove  115 . Thus, the height of the reinforcing plate  114  may be adjusted to match the height of the upper end surface of the full-width cutting groove  112  and the upper end surface of the V-shaped cutting groove  113 . 
     In the electrode cutting device according to the first embodiment of the present invention, a full-width support member  130  that elastically supports the electrode sheet disposed in the full-width cutting groove  112  is further disposed in the full-width support groove  112 . Particularly, the full-width support member  130  serves to elastically press the electrode sheet together with the full-width punch when the full-width punch cuts the electrode sheet. 
     That is, the full-width support member  130  is provided to be movable in a direction of a bottom surface of the full-width cutting groove  112  (a downward direction of the full-width support member when viewed in  FIG.  10   ) and comprises a full-width support plate  131  elastically supporting the electrode sheet  10  disposed in the full-width cutting groove  112  and a full-width elastic piece  132  providing elastic force so that the full-width support plate  131  is disposed on an upper end of the full-width cutting groove  112 , and also, the full-width support plate elastically supports the electrode sheet  10 . 
     Here, an end of the full-width support plate  131  disposed on the cutting line α has the same inclined surface  131   a  as the full-width inclination surface  122   a  of the full-width punch  122 . 
     In the full-width support member  130  having the above-described configuration, the full-width punch  122  and the full-width support plate  131  may press both surfaces of the electrode sheet  10  at a potion at which the full-width punch  122  is in close contact with the electrode sheet  10  disposed in the full-width cutting groove  112 , and in particular, the full-width punch  122  and the full-width support plate  131  elastically press the electrode sheet  10  by the full-width elastic piece  132  to prevent wrinkles from occurring when cutting the electrode sheet  10  disposed in the full-width cutting groove  112 . In addition, the full-width punch  122  cuts the electrode sheet  10  disposed in the cutting groove  112  along the cutting line at a point at which the full-width punch  122  is inserted into the full-width cutting groove  112 . Here, the full-width support plate  131  may elastically press the bottom surface of the electrode sheet  10  by the full-width elastic piece  132  to accurately cut the electrode sheet  10 . 
     The full-width elastic piece may be provided as a coil spring. 
     In the electrode cutting device according to the first embodiment of the present invention, a V-shaped support member  140  that elastically supports the electrode sheet disposed in the V-shaped cutting groove  113  is further disposed in the V-shaped support groove  113 . 
     The V-shaped support member  140  is provided to be movable in the direction of a bottom surface of the V-shaped cutting groove  113  (a downward direction of the V-shaped support member when viewed in  FIG.  10   ) and comprises a V-shaped support plate  141  elastically supporting the electrode sheet  10  disposed in the V-shaped cutting groove  113  and a V-shaped elastic piece  142  providing elastic force so that the V-shaped support plate  141  is disposed on an upper end of the V-shaped cutting groove  113 , and also, the V-shaped support plate elastically supports the electrode sheet  10 . 
     In the V-shaped support member  140  having the above-described configuration, the V-shaped punch  123  and the V-shaped support plate  141  may press both surfaces of the electrode sheet  10  at a potion at which the V-shaped punch  123  is in close contact with the electrode sheet  10  disposed in the V-shaped cutting groove  113 , and in particular, the V-shaped punch  123  and the V-shaped support plate  141  elastically press the electrode sheet  10  by the V-shaped elastic piece  142  to prevent wrinkles from occurring when cutting the electrode sheet  10  disposed in the V-shaped cutting groove  113 . In addition, the V-shaped punch  123  cuts the electrode sheet  10  disposed in the cutting groove  113  along the cutting line at a point at which the V-shaped punch  123  is inserted into the V-shaped cutting groove  113 . Here, the V-shaped support plate  141  may elastically press the bottom surface of the electrode sheet  10  by the V-shaped elastic piece  142  to accurately cut the electrode sheet  10 . 
     The V-shaped elastic piece  142  may be provided as a coil spring. 
     In the electrode cutting device according to the first embodiment of the present invention, a cutting surface (a bottom surface of the full-width punch when viewed in  FIG.  10   ) of the full-width punch  122 , which cuts the electrode sheet  10  and a cutting surface (a bottom surface of the V-shaped punch when viewed in  FIG.  10   ) of the V-shaped punch  123  have different heights when viewed with respect to the electrode sheet. In more detail, the cutting surface of the full-width punch  122  is provided to further protrude in the direction of the electrode sheet  10  than the cutting surface of the V-shaped punch  123 . Thus, the electrode sheet  10  is cut along the cutting line to manufacture the electrode, and simultaneously, the edge of the electrode disposed on the cutting line is cut to form the inclined surface, and then the edge of the electrode sheet disposed on the cutting line is cut to form the inclined surface. 
     In the electrode cutting device according to the first embodiment of the present invention, a full-width guide groove  112   a  formed in a vertical direction is formed in the full-width cutting groove  112 , and a full-width guide protrusion  131   b  movably inserted into in the full-width guide groove  112   a  in the vertical direction is formed on the full-width support plate  131 . Thus, the full-width support plate  131  provided in the full-width guide groove  112   a  may vertically move to prevent the electrode sheet disposed on the full-width support plate  131  from moving. 
     In the electrode cutting device according to the first embodiment of the present invention, a V-shaped guide groove  113   a  formed in the vertical direction is formed in the V-shaped cutting groove  113 , and a V-shaped guide protrusion  141   a  movably inserted into in the V-shaped guide groove 113A in the vertical direction is formed on the V-shaped support plate  141 . Thus, the V-shaped support plate  141  provided in the V-shaped guide groove 113A may vertically move to prevent the electrode sheet disposed on the V-shaped support plate from moving. 
     The electrode cutting device according to the first embodiment of the present invention further comprises a guide member  150  that guides the punch member  120  to descend or ascend vertically toward the die member  110 . 
     That is, the guide member  150  comprises a lower guide plate  151  on which the die member  110  is installed, an upper guide plate  152  on which the punch member  120  is installed, and a guide rod  153  having a lower end, which is provided on the lower guide plate  151  when viewed in  FIG.  1   , and an upper end, which is coupled so that the upper guide plate  152  descends or ascends vertically when viewed in  FIG.  1   . 
     The guide member  150  having the above-described configuration may allow the upper guide plate  152  to vertically move along the guide rod  153  and thus may guide the punch member  120  provided on the upper guide plate  152  to descend or ascend vertically toward the die member  110 . Therefore, the electrode sheet may be cut vertically and thus be improved in cutting accuracy. 
     Therefore, the electrode cutting device according to the first embodiment of the present invention may manufacture the electrode by cutting the electrode sheet along the cutting line, and simultaneously, each of the edge of the electrode and the edge of the electrode sheet, which are disposed on the cutting line, may be cut to form the inclined surface, thereby simplifying the process, and in particular, reducing the time taken to manufacture the electrode having the inclined edge, particularly, reducing the defect rate. 
     Hereinafter, an electrode cutting method according to the first embodiment of the present invention will be described. 
     Electrode Cutting Method According to First Embodiment of the Present Invention 
     As illustrated in  FIGS.  8  to  13   , an electrode cutting method according to the first embodiment of the present invention comprises a disposition process of disposing an electrode sheet on a cutting line and a punch process of cutting the electrode sheet along the cutting line to manufacture an electrode, wherein an edge of one end of the electrode disposed on the cutting line is cut together to form an inclined surface, and then, an edge of one end of the electrode sheet, which corresponds to the edge of the one end of the electrode, is cut to form an inclined surface. 
     Here, the electrode cutting method according to the first embodiment of the present invention uses the electrode cutting device, which is described above, and the electrode cutting device comprises a die member and a punch member. Since the electrode cutting device has been described in detail above, a detailed description thereof will be omitted. 
     Disposition Process 
     The disposition process (S 10 ) comprises a first disposition process of disposing a portion of the electrode sheet  10 , which is to be cut, on a cutting line α that is partitioned between a disposition part  111  and a full-width cutting groove  112  and a second disposition process of disposing a portion of the electrode sheet  10 , which is to be cut, disposed on the cutting line in a V-shaped cutting groove  113  of the die member  110 . 
     In the first disposition process, a full-width support member  130  is provided in the full-width cutting groove to elastically support the electrode sheet disposed in the full-width cutting groove. 
     In the second disposition process, a V-shaped support member  140  is provided in the V-shaped cutting groove  113  to elastically support the electrode sheet disposed in the V-shaped cutting groove  113 . 
     Punch Process 
     In the punch process (S 20 ), a full-width punch of the punch member  120  is inserted into the full-width cutting groove  112  to cut the electrode sheet along the cutting line, thereby manufacturing an electrode, and the punch process (S 20 ) comprises a full-width cutting process of cutting an edge of the electrode disposed on the cutting line together to form an inclined surface as an edge of the full-width punch disposed on the cutting line is formed as a full-width inclination surface  122   a  and a V-shaped cutting process of cutting an edge of the electrode sheet to form an inclined surface by inserting the V-shaped punch of the punch member  120  into the V-shaped cutting groove  113 . 
     In the full-width cutting process, the full-width punch  122  of the punch member  120  is inserted into the full-width cutting groove  112  to cut the electrode sheet  10 , which is disposed on the cutting line, along the cutting line, thereby manufacturing an electrode  10 A. Here, as illustrated in  FIG.  11   , the full-width inclination surface  122   a  of the full-width punch cuts the edge of the electrode disposed on the cutting line to form the inclined surface. 
     In the full-width cutting process, the full-width punch cuts the electrode sheet while being inserted into the full-width cutting groove  112  in a state of pressing the electrode sheet disposed in the full-width cutting groove  112  together with the full-width support member  130 . 
     Particularly, in the full-width cutting process, when cutting the electrode sheet  10 , the full-width punch and the full-width support member  130  cut the electrode sheet  10  in a state of elastically pressing the electrode sheet  10  to prevent wrinkles from occurring in the electrode sheet  10 , thereby improving the cutting accuracy of the electrode sheet. 
     In the V-shaped cutting process, as illustrated in  FIG.  12   , the V-shaped punch  123  of the punch member  120  cuts the edge of the electrode sheet  10  disposed in the V-shaped groove to form the inclined surface while being inserted into the V-shaped cutting groove  113 . 
     In the V-shaped cutting process, the V-shaped punch cuts the edge of the one end of the electrode sheet to form the inclined surface while being inserted into the V-shaped cutting groove  113  in the state of pressing the electrode sheet disposed in the V-shaped cutting groove  113  together with the V-shaped support member  140 . 
     Particularly, in the V-shaped cutting process, when cutting the edge of the electrode sheet, the V-shaped punch  123  and the V-shaped support member  140  cut the edge of the electrode sheet in the state of elastically pressing the edge of the electrode sheet disposed on the cutting line to prevent the wrinkles from occurring, thereby improving the cutting accuracy of the electrode sheet. 
     When the punch process is completed as described above, as illustrated in  FIG.  13   , the electrode sheet disposed on the cutting line α may be cut, and simultaneously, each of the edge of the one end of the electrode and the edge of the one end of the electrode sheet, which are disposed on the cutting line, may be cut to form the inclined plane. In addition, a triangular-shaped cutting piece  11  is generated. 
     Therefore, in the electrode cutting method according to the first embodiment of the present invention, the electrode having inclined edge may be continuously manufactured. 
     In this embodiment, the structure, in which only one edge of the electrode has the inclined surface when viewed in the full-length direction, has been described. However, each of both edges may have the inclined surface when viewed in the full-length direction according to the application. 
     Hereinafter, in descriptions of another embodiment of the present invention, constituents having the same function as the above-mentioned embodiment have been given the same reference numeral in the drawings, and thus duplicated description will be omitted. 
     Electrode Manufacturing Apparatus According to Second Embodiment of the Present Invention 
     As illustrated in  FIG.  14   , an electrode manufacturing apparatus according to a second embodiment of the present invention comprises a transfer device  1  that transfers an electrode sheet  10 , on which a non-coating portion  12  is formed, a notching device  2  that notches the non-coating portion of the electrode sheet  10  transferred by the transfer device  1  to process electrode tabs  12  at regular intervals, and an electrode cutting device  100  that cuts the electrode sheet, on which the electrode tab  12  is processed by the notching device  2 , to manufacture an electrode  10 A having an inclined edge. 
     Here, the electrode cutting device  100  comprises a die member  110  on which the electrode sheep, on which the electrode tab  12  is processed, is disposed, and a punch member  120  that cuts the electrode sheet  10  disposed on the die member  110  to manufacture the electrode  10 A having the inclined edge. 
     The electrode cutting device  100  has the same configuration and function as the electrolyte cutting device according to the foregoing first embodiment, and thus, a duplicated description thereof will be omitted. 
     Therefore, the electrode manufacturing apparatus according to the second embodiment of the present invention may continuously manufacture the electrode  10 A having the inclined edge, and in particular, may manufacture the electrode having the uniform quality, and in particular, may simplify the process. 
     Accordingly, the scope of the present invention is defined by the appended claims more than the foregoing description and the exemplary embodiments described therein. Various modifications made within the meaning of an equivalent of the claims of the invention and within the claims are to be regarded to be in the scope of the present invention. 
     
       
         
           
               
               
             
               
                 Description of the Symbols 
               
             
            
               
                   110 : 
                 Die member 
               
               
                   111 : 
                 Disposition part 
               
               
                   111   a : 
                 Disposition inclination surface 
               
               
                   112 : 
                 Full-width cutting groove 
               
               
                   112   a : 
                 Full-width guide groove 
               
               
                   113 : 
                 V-shaped cutting groove 
               
               
                   113   a : 
                 V-shaped guide groove 
               
               
                   114 : 
                 Reinforcing plate 
               
               
                   115 : 
                 Coupling groove 
               
               
                   120 : 
                 Punch member 
               
               
                   121 : 
                 Punch body 
               
               
                   122 : 
                 Full-width punch 
               
               
                   112   a : 
                 Full-width inclination surface 
               
               
                   123 : 
                 V-shaped punch 
               
               
                   130 : 
                 Full-width support member 
               
               
                   131 : 
                 Full-width support plate 
               
               
                   132 : 
                 Full-width elastic piece 
               
               
                   140 :: 
                 V-shaped support member 
               
               
                   141 : 
                 V-shaped support plate 
               
               
                   142 : 
                 V-shaped elastic piece 
               
               
                   150 : 
                 Guide member 
               
               
                   151 : 
                 Lower guide plate 
               
               
                   152 : 
                 Upper guide plate 
               
               
                   153 : 
                 Guide rod