Patent Description:
The present invention relates to an electrode cutting device and method, which simplify a cutting process for an electrode sheet, and an electrode manufacturing facility comprising the same.

<CIT> relates to the technical field of lithium-ion battery manufacturing, and to a device for preparing pole piece components of lithium-ion batteries.

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.

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 facility comprising the same.

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 facility 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.

The electrode cutting device according to the present invention comprises 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.

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. 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.

As illustrated in <FIG> and <FIG>, an electrode cutting device according to a first embodiment of the present invention comprises a die member <NUM>, on which an electrode sheet <NUM> is disposed on a surface on which a cutting line is partitioned, and a punch member <NUM> that cuts the electrode <NUM> disposed on the die member along the cutting line to manufacture an electrode 10A.

The electrode sheet <NUM> 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 <NUM> 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 10A comprising the electrode tab and the coating portion.

The electrode sheet is disposed on the die member <NUM>. The die member <NUM> has a surface (a top surface when viewed in <FIG>) that comprises a disposition part <NUM> provided at one side with respect to the cutting line, a full-width cutting groove <NUM> provided at the other side with respect to the cutting line, and a V-shaped cutting groove <NUM> provided on the cutting line.

The disposition part <NUM> is provided at one side (a left side of the cutting line when viewed in <FIG>) of the cutting line α that is partitioned on the top surface of the die member <NUM> and is provided as a horizontal surface so that the electrode sheet <NUM> is disposed.

Here, one end (a lower edge of the disposition part disposed on the cutting line when viewed in <FIG>) of the disposition part <NUM> disposed on the cutting line α has a disposition inclination surface 111a, and thus, a groove may be formed between the cutting line α and the disposition inclination surface 111a. A V-shaped punch may be inserted into the groove formed between the cutting line α and the disposition inclination surface 111a 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 <NUM> is provided at the other side (a right side of the cutting line when viewed in <FIG>) of the cutting line α partitioned on the die member <NUM> and is formed as a groove having a predetermined depth. That is, the electrode sheet disposed in the full-width cutting groove <NUM> is disposed in a levitated state. In addition, the electrode sheet <NUM> disposed in the full-width cutting groove <NUM> may be elastically supported by a full-width support member to be described later.

The V-shaped cutting groove <NUM> is provided in the cutting line α (a lower end of the cutting line at which the disposition part <NUM> and the full-width cutting groove <NUM> meet each other) and is formed as a groove having a predetermined depth. The V-shaped cutting groove <NUM> is provided to be connected to the groove formed in the disposition inclination surface 111a. That is, the electrode sheet <NUM> disposed in the V-shaped cutting groove <NUM> is disposed in a levitated state. In addition, the electrode sheet <NUM> disposed in the V-shaped cutting groove <NUM> 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.

The punch member <NUM> 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 <NUM>, a full-width punch <NUM>, and a V-shaped punch <NUM>.

The punch body <NUM> is provided above the die member <NUM> to descend or ascend toward the die member <NUM> as illustrated in <FIG>.

The full-width punch <NUM> is provided on a bottom surface of the punch body <NUM> as illustrated in <FIG> and is inserted into the full-width cutting groove <NUM> when the punch body <NUM> descends to cut the electrode sheet <NUM>, which is disposed on the cutting line α, along the cutting line α, thereby manufacturing the electrode. That is, referring to <FIG>, the full-width punch <NUM> 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 <NUM>, which corresponds to the disposition inclination surface 111a (a lower end of a left side of the full-width punch disposed on the cutting line when viewed in <FIG>) may be formed as a full-width inclination surface 122a, and the full-width inclination surface 122a cuts an edge of the electrode 10A disposed on the cutting line to form an inclined surface.

That is, the full-width punch <NUM> 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 10A disposed on the cutting line to form an inclined surface. In summary, the full-width punch <NUM> may cut the electrode sheet and the edge of the electrode at the same time, and as a result, the electrode 10A of which the edge is cut to form the inclined surface may be manufactured.

The V-shaped punch <NUM> is provided on the bottom surface of the punch body <NUM> and cuts the edge of the electrode sheet disposed in the groove formed by the disposition inclination surface 111a while being inserted into the V-shaped cutting groove <NUM> 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 <NUM> descends toward the die member <NUM> after the electrode sheet <NUM> is disposed on the die member <NUM>, while the full-width punch <NUM> of the punch member <NUM> is inserted into the full-width cutting groove <NUM>, 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 <NUM> of the punch member <NUM> cuts the edge of the electrode sheet disposed on the cutting line while being inserted into the V-shaped cutting groove <NUM>.

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 <NUM> on a top surface of the disposition part <NUM>. The reinforcing plate <NUM> 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 <NUM> may be detachably coupled to the disposition part <NUM> to improve ease of maintenance. Particularly, since the reinforcing plate <NUM> has strength greater than that of the die member <NUM>, the reinforcing plate <NUM>, the reinforcing plate <NUM> may be prevented from being easily damaged by an external impact or a punching operation.

One end of the reinforcing plate <NUM> 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 <NUM> may be coupled to the disposition part <NUM> to slidably move in a direction toward or opposite to the cutting line α. Thus, when an end of the reinforcing plate <NUM> and the cutting line α do not match, the position of the reinforcing plate <NUM> may be adjusted to allow the end of the reinforcing plate <NUM> to match the cutting line α. Particularly, the position of the reinforcing plate <NUM> may be arbitrarily adjusted to change the position of the cutting line α.

The reinforcing plate <NUM> is coupled to the coupling groove <NUM> formed in the disposition part <NUM>, in particular, a top surface of the reinforcing plate <NUM>, an upper end surface of the full-width cutting groove <NUM>, and an upper end surface of the V-shaped cutting groove <NUM> have the same height when viewed with respect to the electrode sheet. Thus, the horizontality of the electrode sheet <NUM> disposed on the die member may increase, and as a result, the cutting accuracy when punching the electrode sheet <NUM> may be improved.

The reinforcing plate <NUM> may be coupled to the coupling groove <NUM> so as to be adjustable in height in a direction of the bottom surface of the coupling groove <NUM> or in a direction opposite to the bottom surface of the coupling groove <NUM>. Thus, the height of the reinforcing plate <NUM> may be adjusted to match the height of the upper end surface of the full-width cutting groove <NUM> and the upper end surface of the V-shaped cutting groove <NUM>.

In the electrode cutting device according to the first embodiment of the present invention, a full-width support member <NUM> that elastically supports the electrode sheet disposed in the full-width cutting groove <NUM> is further disposed in the full-width support groove <NUM>. Particularly, the full-width support member <NUM> 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 <NUM> is provided to be movable in a direction of a bottom surface of the full-width cutting groove <NUM> (a downward direction of the full-width support member when viewed in <FIG>) and comprises a full-width support plate <NUM> elastically supporting the electrode sheet <NUM> disposed in the full-width cutting groove <NUM> and a full-width elastic piece <NUM> providing elastic force so that the full-width support plate <NUM> is disposed on an upper end of the full-width cutting groove <NUM>, and also, the full-width support plate elastically supports the electrode sheet <NUM>.

Here, an end of the full-width support plate <NUM> disposed on the cutting line α has the same inclined surface 131a as the full-width inclination surface 122a of the full-width punch <NUM>.

In the full-width support member <NUM> having the above-described configuration, the full-width punch <NUM> and the full-width support plate <NUM> may press both surfaces of the electrode sheet <NUM> at a potion at which the full-width punch <NUM> is in close contact with the electrode sheet <NUM> disposed in the full-width cutting groove <NUM>, and in particular, the full-width punch <NUM> and the full-width support plate <NUM> elastically press the electrode sheet <NUM> by the full-width elastic piece <NUM> to prevent wrinkles from occurring when cutting the electrode sheet <NUM> disposed in the full-width cutting groove <NUM>. In addition, the full-width punch <NUM> cuts the electrode sheet <NUM> disposed in the cutting groove <NUM> along the cutting line at a point at which the full-width punch <NUM> is inserted into the full-width cutting groove <NUM>. Here, the full-width support plate <NUM> may elastically press the bottom surface of the electrode sheet <NUM> by the full-width elastic piece <NUM> to accurately cut the electrode sheet <NUM>.

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 <NUM> that elastically supports the electrode sheet disposed in the V-shaped cutting groove <NUM> is further disposed in the V-shaped support groove <NUM>.

The V-shaped support member <NUM> is provided to be movable in the direction of a bottom surface of the V-shaped cutting groove <NUM> (a downward direction of the V-shaped support member when viewed in <FIG>) and comprises a V-shaped support plate <NUM> elastically supporting the electrode sheet <NUM> disposed in the V-shaped cutting groove <NUM> and a V-shaped elastic piece <NUM> providing elastic force so that the V-shaped support plate <NUM> is disposed on an upper end of the V-shaped cutting groove <NUM>, and also, the V-shaped support plate elastically supports the electrode sheet <NUM>.

In the V-shaped support member <NUM> having the above-described configuration, the V-shaped punch <NUM> and the V-shaped support plate <NUM> may press both surfaces of the electrode sheet <NUM> at a potion at which the V-shaped punch <NUM> is in close contact with the electrode sheet <NUM> disposed in the V-shaped cutting groove <NUM>, and in particular, the V-shaped punch <NUM> and the V-shaped support plate <NUM> elastically press the electrode sheet <NUM> by the V-shaped elastic piece <NUM> to prevent wrinkles from occurring when cutting the electrode sheet <NUM> disposed in the V-shaped cutting groove <NUM>. In addition, the V-shaped punch <NUM> cuts the electrode sheet <NUM> disposed in the cutting groove <NUM> along the cutting line at a point at which the V-shaped punch <NUM> is inserted into the V-shaped cutting groove <NUM>. Here, the V-shaped support plate <NUM> may elastically press the bottom surface of the electrode sheet <NUM> by the V-shaped elastic piece <NUM> to accurately cut the electrode sheet <NUM>.

The V-shaped elastic piece <NUM> 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>) of the full-width punch <NUM>, which cuts the electrode sheet <NUM> and a cutting surface (a bottom surface of the V-shaped punch when viewed in <FIG>) of the V-shaped punch <NUM> have different heights when viewed with respect to the electrode sheet. In more detail, the cutting surface of the full-width punch <NUM> is provided to further protrude in the direction of the electrode sheet <NUM> than the cutting surface of the V-shaped punch <NUM>. Thus, the electrode sheet <NUM> 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 112a formed in a vertical direction is formed in the full-width cutting groove <NUM>, and a full-width guide protrusion 131b movably inserted into in the full-width guide groove 112a in the vertical direction is formed on the full-width support plate <NUM>. Thus, the full-width support plate <NUM> provided in the full-width guide groove 112a may vertically move to prevent the electrode sheet disposed on the full-width support plate <NUM> from moving.

In the electrode cutting device according to the first embodiment of the present invention, a V-shaped guide groove 113a formed in the vertical direction is formed in the V-shaped cutting groove <NUM>, and a V-shaped guide protrusion 141a movably inserted into in the V-shaped guide groove 113A in the vertical direction is formed on the V-shaped support plate <NUM>. Thus, the V-shaped support plate <NUM> 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 <NUM> that guides the punch member <NUM> to descend or ascend vertically toward the die member <NUM>.

That is, the guide member <NUM> comprises a lower guide plate <NUM> on which the die member <NUM> is installed, an upper guide plate <NUM> on which the punch member <NUM> is installed, and a guide rod <NUM> having a lower end, which is provided on the lower guide plate <NUM> when viewed in <FIG>, and an upper end, which is coupled so that the upper guide plate <NUM> descends or ascends vertically when viewed in <FIG>.

The guide member <NUM> having the above-described configuration may allow the upper guide plate <NUM> to vertically move along the guide rod <NUM> and thus may guide the punch member <NUM> provided on the upper guide plate <NUM> to descend or ascend vertically toward the die member <NUM>. 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.

As illustrated in <FIG>, 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.

The disposition process (S10) comprises a first disposition process of disposing a portion of the electrode sheet <NUM>, which is to be cut, on a cutting line α that is partitioned between a disposition part <NUM> and a full-width cutting groove <NUM> and a second disposition process of disposing a portion of the electrode sheet <NUM>, which is to be cut, disposed on the cutting line in a V-shaped cutting groove <NUM> of the die member <NUM>.

In the first disposition process, a full-width support member <NUM> 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 <NUM> is provided in the V-shaped cutting groove <NUM> to elastically support the electrode sheet disposed in the V-shaped cutting groove <NUM>.

In the punch process (S20), a full-width punch of the punch member <NUM> is inserted into the full-width cutting groove <NUM> to cut the electrode sheet along the cutting line, thereby manufacturing an electrode, and the punch process (S20) 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 122a 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 <NUM> into the V-shaped cutting groove <NUM>.

In the full-width cutting process, the full-width punch <NUM> of the punch member <NUM> is inserted into the full-width cutting groove <NUM> to cut the electrode sheet <NUM>, which is disposed on the cutting line, along the cutting line, thereby manufacturing an electrode 10A. Here, as illustrated in <FIG>, the full-width inclination surface 122a 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 <NUM> in a state of pressing the electrode sheet disposed in the full-width cutting groove <NUM> together with the full-width support member <NUM>.

Particularly, in the full-width cutting process, when cutting the electrode sheet <NUM>, the full-width punch and the full-width support member <NUM> cut the electrode sheet <NUM> in a state of elastically pressing the electrode sheet <NUM> to prevent wrinkles from occurring in the electrode sheet <NUM>, thereby improving the cutting accuracy of the electrode sheet.

In the V-shaped cutting process, as illustrated in <FIG>, the V-shaped punch <NUM> of the punch member <NUM> cuts the edge of the electrode sheet <NUM> disposed in the V-shaped groove to form the inclined surface while being inserted into the V-shaped cutting groove <NUM>.

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 <NUM> in the state of pressing the electrode sheet disposed in the V-shaped cutting groove <NUM> together with the V-shaped support member <NUM>.

Particularly, in the V-shaped cutting process, when cutting the edge of the electrode sheet, the V-shaped punch <NUM> and the V-shaped support member <NUM> 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>, 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 <NUM> 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.

As illustrated in <FIG>, an electrode manufacturing facility according to a second embodiment of the present invention comprises a transfer device <NUM> that transfers an electrode sheet <NUM>, on which a non-coating portion <NUM> is formed, a notching device <NUM> that notches the non-coating portion of the electrode sheet <NUM> transferred by the transfer device <NUM> to process electrode tabs <NUM> at regular intervals, and an electrode cutting device <NUM> that cuts the electrode sheet, on which the electrode tab <NUM> is processed by the notching device <NUM>, to manufacture an electrode 10A having an inclined edge.

Here, the electrode cutting device <NUM> comprises a die member <NUM> on which the electrode sheet, on which the electrode tab <NUM> is processed, is disposed, and a punch member <NUM> that cuts the electrode sheet <NUM> disposed on the die member <NUM> to manufacture the electrode 10A having the inclined edge.

The electrode cutting device <NUM> 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 facility according to the second embodiment of the present invention may continuously manufacture the electrode 10A having the inclined edge, and in particular, may manufacture the electrode having the uniform quality, and in particular, may simplify the process.

Claim 1:
An electrode cutting device comprising:
a die member (<NUM>) on which an electrode sheet (<NUM>) is disposed on a surface, on which a cutting line (α) is partitioned; and
a punch member (<NUM>) configured to cut the electrode sheet (<NUM>) disposed on the die member (<NUM>) along the cutting line (α) to manufacture an electrode,
characterized in that the die member (<NUM>) comprises:
a disposition part (<NUM>) which is provided at one side of the cutting line (α), on which the electrode sheet (<NUM>) is disposed, and in which one end thereof disposed on the cutting line (α) is formed as a disposition inclination surface (111a) to form a groove between the cutting line (α) and the disposition inclination surface (111a);
a full-width cutting groove (<NUM>) provided at the other side of the cutting line (α); and
a V-shaped cutting groove (<NUM>) provided on the cutting line (α) and connected to the groove formed by the disposition inclination surface (111a),
wherein the punch member (<NUM>) comprises:
a full-width punch (<NUM>) configured to cut the electrode sheet (<NUM>) along the cutting line (α) while being inserted into the full-width cutting groove (<NUM>), thereby manufacturing the electrode (10a), wherein, since one end thereof corresponding to the disposition inclination surface (111a) is formed as a full-width inclination surface (122a), wherein the full-width inclination surface (122a) is arranged on a first side of the cutting line (α), an edge of the electrode (10a) disposed on the cutting line (α) is cut to form an inclined surface; and
a V-shaped punch (<NUM>) configured to cut an edge of the electrode sheet (<NUM>) disposed on the disposition inclination surface (111a) while being inserted into the V-shaped cutting groove (<NUM>) so as to form an inclined surface, wherein the disposition inclination surface (111a) is arranged on a second side of the cutting line (α) opposite to the first side.