KR20240060162A - Notching apparatus of electrode for secondary battery - Google Patents

Abstract

The present invention relates to a notching device for electrodes for secondary batteries, comprising: a notching unit having a strip shape and forming an edge of the electrode by notching an electrode member moving along the longitudinal direction; And a pre-cut unit that forms a cutting part in the electrode member by cutting the outer area of the edge of the electrode into a preset shape, wherein the pre-cut unit is smaller than the notching unit based on the starting position of the electrode member. It is disposed at a nearby position and includes forming the cutting portion before the electrode member reaches the notching unit. As a result, it is possible to suppress the occurrence of defects in the shape and dimension of the electrode when notching the electrode member.

Description

Notching device for electrodes for secondary batteries {NOTCHING APPARATUS OF ELECTRODE FOR SECONDARY BATTERY}

The present invention relates to a notching device for electrodes for secondary batteries.

As is well known, a secondary battery refers to a battery that can be charged and discharged. These secondary batteries are classified into lithium-ion batteries and lithium-ion polymer batteries depending on the composition of the electrode and electrolyte. Recently, the use of lithium-ion polymer batteries, which are less likely to leak electrolyte, is gradually increasing.

In addition, secondary batteries are classified into cylindrical batteries in which the electrode assembly is coupled to a cylindrical or square case, prismatic batteries, or pouch-type batteries in which the electrode assembly is embedded in a pouch-type case of aluminum laminate sheets, depending on the type of case.

The electrode assembly coupled to the inside of the case includes an anode, a cathode, and a separator interposed between the anode and the cathode.

The electrode assembly is of a jelly-roll type in which a long sheet-shaped positive electrode and a negative electrode coated with an active material are rolled with the separator interposed between them, a stack type in which positive and negative electrodes of a predetermined size are laminated through a separator, or a stacked/folding type. It has a complex structure.

The electrodes (anode, cathode) of the electrode assembly are manufactured through a notching process.

In the notching process, a notching lower mechanism and a notching upper mechanism are respectively disposed on the lower and upper sides of the electrode member, and the notching upper mechanism on the upper side of the electrode member disposed above the notching lower mechanism descends to notch the electrode member ( By punching), the border of the electrode is formed.

Typically, the electrode member has a long strip shape and is installed to be able to move (run) along the longitudinal direction, and the notching mechanism is formed by continuously notching the edge shape of the electrode.

Following the notching process, a cutting process for cutting the electrode into a preset shape and a stacking process for stacking the cut electrodes are provided.

Meanwhile, the electrode member is usually manufactured by coating an electrode active material on the surface of a long strip-shaped current collector.

Specifically, the electrode member is a long strip-shaped current collector, a coating portion on which the active material is applied except for a preset width on one side or both sides along the width direction of the current collector, and a coating portion on both sides of the coating portion. It is provided with an uncoated portion, so-called uncoated portion, where the active material is not applied.

Some of the electrode members have a cross-section that is curved (or A so-called curved electrode member (curved) is generated.

However, in such a conventional notching device for electrodes for secondary batteries, a defect in which the electrode member is broken due to microcracks and/or tears in a portion of the edge of the electrode when notching the swelled electrode member occurs, causing the electrode to continue to be uninterrupted. There is a problem that production becomes difficult.

In addition, even if the electrode member does not break, there is a problem that shape defects occur in which the shape of each edge of the electrode is distorted when notching the swell electrode member.

In addition, there is a problem in that such poor shape of the electrode causes dimensional defects of each edge of the electrode.

In addition, in order to suppress the occurrence of broken parts and/or dimensional defects when notching the electrode, the moving speed of the electrode member is set to be lowered below a certain speed, which reduces the production speed of the electrode, ultimately reducing the electrode member's movement speed. There is a problem that it leads to a decrease in productivity.

KR 1020170027993 A (2017.03.13. open)

Therefore, the purpose of the present invention is to provide a notching device for electrodes for secondary batteries that can suppress the occurrence of defects in the shape and dimension of electrodes when notching electrode members.

Another object of the present invention is to provide a notching device for an electrode for a secondary battery that can suppress the occurrence of breakage of the electrode member when notching the electrode member.

Another object of the present invention is to provide a notching device for electrodes for secondary batteries that can suppress a decrease in the production rate of electrodes.

The notching device for secondary battery electrodes according to the present invention for solving the problems described above has a technical feature of cutting the electrode member into a preset shape before notching the electrode member.

Specifically, a notching unit for notching the edge of the electrode and a precut unit for cutting the outer area of the edge of the electrode before notching of the notching unit are provided, so that the electrode member is cut before notching the electrode, thereby forming the electrode. The occurrence of dimensional defects is suppressed.

In one embodiment of the present invention, the notching device for the electrode for a secondary battery includes a notching unit that has a strip shape and forms an edge of the electrode by notching an electrode member that moves along the longitudinal direction; And a pre-cut unit that forms a cutting part in the electrode member by cutting the outer area of the edge of the electrode into a preset shape, wherein the pre-cut unit is smaller than the notching unit based on the starting position of the electrode member. It is disposed at a nearby position, and the cutting portion is formed before the electrode member reaches the notching unit.

As a result, the occurrence of shape and dimension defects of the electrode during notching of the electrode can be suppressed.

Additionally, when forming the electrode member, fracture of the electrode member can be suppressed.

In addition, the speed limit of the electrode member due to defective damage to the electrode can be eliminated (or alleviated), so the production speed of the electrode can be improved.

In one embodiment of the present invention, the electrode member includes a coated portion coated with an active material and an uncoated portion not coated with the active material,

The cutting part is formed by cutting a portion of the uncoated part and the coated part.

As a result, the stress generated during the manufacturing of the electrode member and remaining in the uncoated portion and the coated portion can be removed or alleviated, thereby suppressing the occurrence of fracture defects and/or shape defects of the electrode member due to the residual stress.

In one embodiment of the present invention, the cutting portion has a cross-sectional shape that is open outward along the width direction of the electrode member.

As a result, fracture of the electrode member starting from the relatively thin uncoated portion can be suppressed from proceeding toward the center of the electrode member along the width direction.

In one embodiment of the present invention, the cutting portion is configured to include a linear section cut linearly from the outside to the inside of the electrode member and a curved section extending in a curved shape from the linear section toward the outside of the electrode member. .

Thereby, the configuration of the precut unit can be simplified.

Specifically, the precut unit forming the cutting portion may be configured by providing the electrode member with a knife or knife having the linear section and the curved section, so that it can be manufactured more easily than a precut unit having a punch and die. You can.

In addition, fracture that starts from the uncoated portion and progresses to the coated portion along the width direction of the electrode member can be suppressed.

In one embodiment of the present invention, the curved section is arranged in front of the linear section based on the moving direction of the electrode member.

As a result, the occurrence of folding of the protrusion formed inside the curved section of the cutting part can be suppressed.

Additionally, fracture of the electrode member caused by folding of the protrusion formed inside the curved section of the cutting portion can be suppressed.

In one embodiment of the present invention, the linear section is formed to be inclined inward and forward based on the moving direction of the electrode member.

As a result, the occurrence of folding at the vertex forming an acute angle on one side of the entrance of the cutting part can be suppressed.

In addition, fracture of the electrode member caused by folding of the vertex forming an acute angle on one side of the entrance of the cutting portion can be suppressed.

In one embodiment of the present invention, the electrode member may have an uncoated portion formed on one side along the width direction of the electrode member.

According to this configuration, one electrode and one cutting portion can be formed along the width direction of the electrode member.

In one embodiment of the present invention, the electrode member has uncoated portions formed on both sides along the width direction of the electrode member.

According to this configuration, when notching once, one or more pairs of electrodes and one or more pairs of cutting portions can be formed on both sides along the width direction of the electrode member.

In one embodiment of the present invention, the electrode and the cutting portion are each formed symmetrically with respect to the longitudinal center line of the electrode member.

As a result, a relatively large number of electrodes can be produced by forming pairs of electrodes on both sides of the center line during one notching.

As a result, the notching unit and the cutting portion can be easily manufactured.

In one embodiment of the present invention, the electrodes are formed in a plurality of pairs, and the cutting portions are formed on the outside of each pair of electrodes disposed ahead along the moving direction of the electrode member.

As a result, the cutting portion is formed on the outside of the pair of electrodes disposed in the front, where breakage occurs relatively frequently, and thus the occurrence of breakage of the electrode member can be significantly reduced.

In one embodiment of the present invention, the electrodes are formed in plural pairs, and the cutting portions are formed on the outside of each of the plurality of pairs of electrodes.

As a result, the cutting portions are each formed in areas where breakage occurs relatively frequently, so that the occurrence of breakage of the electrode member can be more significantly reduced.

In one embodiment of the present invention, the notching unit includes a lower notching mechanism disposed below the electrode member and an upper notching mechanism disposed above the electrode member,

The precut unit includes a precut lower mechanism disposed below the electrode member and a precut upper mechanism disposed above the electrode member.

As a result, inspection and replacement of the notching unit and the precut unit can be easily performed.

Additionally, the precut unit can be driven in combination with another notching unit.

In one embodiment of the present invention, it further includes a connecting member, one end of which is connected to the notching upper mechanism and the other end of which is connected to the precut upper mechanism,

The precut upper mechanism is interlocked with the notching upper mechanism by the connecting member.

As a result, the precut unit can be easily driven.

Additionally, the use of a separate driving unit for driving the precut unit can be eliminated.

In one embodiment of the present invention, the notched upper mechanism is provided with a connecting member coupling portion to which one end of the connecting member is coupled,

The precut upper mechanism is provided with a sliding coupling portion to which one end of the connecting member is slidably coupled.

As a result, coupling and separation of the precut unit and the notching unit can be performed quickly and easily.

In one embodiment of the present invention, a lower mechanism provided below the electrode member; and

It further includes; an upper mechanism provided on the upper side of the electrode member to be capable of being raised and lowered;

The notching unit includes a notching punch having a shape corresponding to the shape of the electrode and a notching die having a shape corresponding to the shape of the electrode,

The precut unit is provided with a precut punch having a shape corresponding to the shape of the cutting part,

The notching punch and the precut punch are provided in the upper mechanism.

As a result, the notching and cutting (pre-cut) can be performed simultaneously when the upper mechanism is lowered.

In one embodiment of the present invention, the precut unit further includes a precut die having a shape corresponding to the shape of the cutting part,

The notching die and the precut die are provided in the lower mechanism.

In one embodiment of the present invention, the precut punch is configured to have a circular rod shape.

Here, the precut punch may be placed at a position where the center line corresponds to one side or both sides of the electrode member.

As a result, a cutting portion in the shape of a curved surface (circular arc, semicircle) that is open to the outside of the electrode member is formed.

In one embodiment of the present invention, the precut punch is configured to have a polygonal cross section such as a triangle or square, or a cross section of various planar geometric shapes.

As a result, cutting portions having cross-sections of various planar shapes, such as polygonal shapes, that are open outward along the width direction of the electrode member are formed, respectively.

In one embodiment of the present invention, the precut punch is implemented as a hook-shaped cutting tool having a linear section and a curved section bent in a curved shape at the end of the linear section.

Here, the cutting mechanism is comprised of a body having the linear section and a curved section, and a blade whose width is gradually reduced toward the lower mechanism at the bottom of the body.

As a result, the electrode member can be cut with relatively small force.

Additionally, the structure of the precut unit can be simplified compared to a precut unit that has a punch and die for cutting.

In one embodiment of the present invention, the cutting device is such that the curved section is disposed in front of the linear section based on the moving direction of the electrode member,

The linear section is disposed inclined toward the inner front along the width direction of the electrode member.

As a result, after forming the cutting portion of the electrode member, the phenomenon of the sharp portion around the cutting portion being curled or folded due to contact with the surrounding area can be suppressed.

In addition, the phenomenon of fracture of the electrode member as the sharp portion around the cutting portion is curled or folded can be suppressed.

In one embodiment of the present invention, the lower mechanism is provided with a support pad disposed below the cutting mechanism to support the electrode member.

Accordingly, when the electrode member is cut by the cutting mechanism, the electrode member can be easily supported.

As described above, according to one embodiment of the present invention, a precut unit is provided to form a cutting part of a preset shape in the outer area of the edge of the electrode, and the cutting part is first formed before notching the electrode, thereby reducing the electrode member during notching. The occurrence of fracture can be suppressed.

In addition, the cutting portion is formed to cut a portion of the uncoated portion and the coated portion of the electrode member, so that fracture of the electrode member can be effectively suppressed.

Additionally, the cutting portion has a curved shape that is open outward along the width direction of the electrode member, thereby preventing fracture of the electrode member from progressing toward the center of the electrode member.

In addition, the cutting unit includes a linear section cut linearly from the outside to the inside of the electrode member and a curved section extending in a curved shape from the linear section toward the uncoated portion, thereby simplifying the configuration of the precut unit. Manufacturing can be easily accomplished.

Additionally, by arranging the curved section in front of the linear section based on the moving direction of the electrode member, folding and/or breaking around the curved section of the cutting portion can be suppressed.

In addition, the linear section is formed to be inclined inward and forward based on the moving direction of the electrode member, so that folding and/or breakage around the entrance of the cutting portion can be suppressed.

In addition, the electrode and the cutting portion are each formed symmetrically with respect to the longitudinal center line of the electrode member, so that the notching unit and the precut unit can be easily manufactured.

In addition, since the cutting portion is formed on the outside of each pair of electrodes disposed in front along the moving direction of the electrode member, the occurrence of fracture of the electrode member can be reduced.

Additionally, by forming the cutting portions on the outside of each of the plurality of pairs of electrodes, the occurrence of fracture of the electrode member can be further reduced.

In addition, the notching unit includes a notching lower mechanism disposed on the lower side of the electrode member and a notching upper mechanism disposed on the upper side of the electrode member, and the precut unit includes a precut lower mechanism disposed on the lower side of the electrode member. By providing a mechanism and a pre-cut upper mechanism disposed on the upper side of the electrode member, inspection and replacement of the notching unit and the pre-cut unit can be easily performed, respectively.

In addition, it further includes a connecting member, one end of which is connected to the notching upper mechanism and the other end of which is connected to the precut upper mechanism, wherein the precut upper mechanism is interlocked with the notching upper mechanism by the connecting member, The use of a separate driving unit for driving the precut upper mechanism can be excluded.

In addition, the notching unit includes a notching punch having a shape corresponding to the shape of the electrode and a notching die having a shape corresponding to the shape of the electrode, and the precut unit has a shape corresponding to the shape of the cutting portion. It is provided with a pre-cut punch having, and the notching punch and the pre-cut punch are provided in the upper mechanism, so that notching and cutting of the electrode member can be performed simultaneously by lowering the upper mechanism.

In addition, the precut punch is provided with a hook-shaped cutting mechanism having a linear section and a curved section bent in a curved shape at the end of the linear section, so that fracture of the electrode member occurs along the width direction of the electrode member. Progression toward the center may be inhibited.

In addition, the cutting mechanism is such that the curved section is disposed in front of the linear section based on the moving direction of the electrode member, and the linear section is disposed inclined inward and forward along the width direction of the electrode member, so that the cutting unit When the electrode member is moved after formation, occurrence of fracture due to folding (bending) and/or folding (bending) around the cutting portion can be suppressed.

In addition, the cutting mechanism is provided with a body having the linear section and the curved section and a blade whose width is gradually reduced toward the lower mechanism at the bottom of the body, thereby cutting the electrode member with relatively small force. This can be done.

In addition, the lower mechanism is provided with a support pad disposed below the cutting mechanism to support the electrode member, so that the electrode member can be easily supported when cutting the electrode member.

1 is a perspective view of a notching device for an electrode for a secondary battery according to an embodiment of the present invention;
Figure 2 is a plan view of the notching device for the secondary battery electrode of Figure 1;
Figure 3 is a front view of the notching device for the secondary battery electrode of Figure 1;
Figure 4 is a bottom view of the notching device for the secondary battery electrode of Figure 1;
Figure 5 is a plan view of the electrode member passing through the notching device for the secondary battery electrode of Figure 1;
Figure 6 is a plan view of an electrode to be notched by the notching device for the secondary battery electrode of Figure 1;
Figure 7 is a perspective view of the lower mechanism of the notching device for the secondary battery electrode of Figure 1;
Figure 8 is a perspective view of the upper mechanism of the notching device for the secondary battery electrode of Figure 1;
FIG. 9 is a view showing a lowered state of the upper mechanism of the notching device for the secondary battery electrode of FIG. 1;
Figure 10 is a view showing an electrode member notched and cut by the notching device for the secondary battery electrode of Figure 1;
Figure 11 shows a notching device for electrodes for secondary batteries according to another embodiment of the present invention.
perspective view,
Figure 12 is a front view of the notching device for the secondary battery electrode of Figure 11;
Figure 13 is a view showing the lowered state of the upper mechanism of Figure 12;
FIG. 14 is a view simultaneously showing the notching device and the electrode member of the electrode for the secondary battery of FIG. 11;
15 is a plan view of a notching device for an electrode for a secondary battery according to another embodiment of the present invention;
16 is a plan view of a notching device for an electrode for a secondary battery according to another embodiment of the present invention;
Figure 17 is an enlarged view of the cut portion of the electrode member of Figure 16;
Figure 18 is a perspective view of the cutting mechanism of Figure 16;
FIG. 19 is a view showing the arrangement of the cutting tool, electrode member, and support pad of FIG. 18;
Figure 20 is a plan view of a notching device for an electrode for a secondary battery according to another embodiment of the present invention.

Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. In this specification, the same or similar reference numbers are assigned to the same or similar components even in different embodiments, and the description is replaced with the first description. As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. Additionally, in describing the embodiments disclosed in this specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed descriptions will be omitted. In addition, it should be noted that the attached drawings are only intended to facilitate understanding of the embodiments disclosed in this specification, and should not be construed as limiting the technical idea disclosed in this specification by the attached drawings.

Figure 1 is a perspective view of a notching device for an electrode for a secondary battery according to an embodiment of the present invention, Figure 2 is a plan view of a notching device for an electrode for a secondary battery of Figure 1, and Figure 3 is a notching device for an electrode for a secondary battery of Figure 1. It is a front view, Figure 4 is a bottom view of the notching device for the secondary battery electrode of Figure 1, Figure 5 is a plan view of the electrode member passing through the notching device for the secondary battery electrode of Figure 1, and Figure 6 is a secondary battery electrode of Figure 1. This is a top view of the electrode to be notched by the notching device. As shown in FIGS. 1 to 4, the notching device 100 for a secondary battery electrode of this embodiment includes a notching unit 110 and a precut unit 210.

The notching unit 110 is configured to form an edge of the electrode 107 by notching the electrode member 105 having a long strip shape.

The precut unit 210 is configured to form a cutting portion 106 on the electrode member 105 by cutting the outer area of the edge of the electrode 107 into a preset shape.

The precut unit 210 is disposed at a position closer to the starting position of the electrode member 105 along the moving direction of the electrode member 105 than the notching unit 110.

Accordingly, the notching device 100 for a secondary battery electrode of the present embodiment first (before notching) cuts the cutting portion 106 on the outer area of the edge of the electrode 107 while moving the electrode member 105 along the longitudinal direction. After is formed, the area where the cutting portion 106 is formed is moved to the notching unit 110 and notched, thereby forming the edge of the electrode 107.

Here, in the process of first forming the cutting portion 106 before notching the electrode member 105, residual stress, strain (swell), etc. generated during manufacturing of the electrode member 105 is formed in the cutting portion 106. ) is formed, removed or alleviated, so that the occurrence of fracture of the electrode member 105 due to the stress and strain (swell) during notching of the electrode member 105 can be significantly reduced.

In this embodiment, the electrode member 105 is configured to have a long strip shape, as shown in FIGS. 2 and 5, for example.

As shown in FIG. 2, the electrode member 105 is moved along the longitudinal direction and is installed to be able to travel horizontally through the notching device 100 for the secondary battery electrode.

Although not specifically shown in the drawing, the electrode member 105 is wound in a winding device and disposed at the potential of the notching device 100 for the electrode for a secondary battery, and is unwound from the winding device and a notching device for the electrode for a secondary battery ( After being cut and notched via 100), it is moved to a subsequent process and cut to a preset size and laminated.

Here, the potential may refer to a position (leading position) relatively close to the starting position (winding device) based on the moving direction of the electrode member 105.

As shown in FIG. 5, the electrode member 105 includes a long strip-shaped body 1051 and a coating portion 1052 coated on the surface of the body 1051.

Specifically, the body 1051 is composed of a current collector 1051. The current collector 1051 (body 1051) is made of metal foil (foil).

Here, the metal forming the current collector 1051 may be, for example, aluminum (Al) or copper (Cu).

The coating portion 1052 is, for example, implemented as an active material layer coated on the surface of the current collector 1051.

Here, as shown in (a) of FIG. 5, the coating portion 1052 has a preset width excluded from both sides along the width direction of the body 1051 (current collector 1051). is formed

Additionally, as shown in (b) of FIG. 5, the coating portion 1052 may be formed by excluding a preset width from one side along the width direction of the body 1051. When the uncoated portion 1053 is formed only on one side along the width direction of the body 1051, as shown in (b) of FIG. 5, one electrode 107 may be formed.

Hereinafter, each embodiment of the present invention will be described as an example in which uncoated portions 1053 are formed on both sides of the body 1051 and electrodes 107 are formed in pairs.

The portions on both sides (sides) or one side of the body 1051 (current collector) that are not coated on both sides of the coated portion 1052 along the width direction of the body 1051 are uncoated portions 1053. Alternatively, it may be referred to as the uncoated region 1053.

The electrode 107 includes an electrode body 1071 and a tab 1072 protruding from the electrode body 1071, for example, as shown in FIG. 6.

In this embodiment, the electrode body 1071 is formed including the coated portion 1052, and the tab 1072 is implemented as the uncoated portion 1053.

Although not specifically shown in the drawing, a lead wire (not shown) of the electrode 107 may be electrically connected to the tab 1072.

The electrode body 1071 is, for example. It is comprised of a rectangular base 10711 and a protrusion 10712 protruding from the base 10711.

In this embodiment, the electrode body 1071 is implemented in approximately an “L” shape.

The base 10711 of the electrode 107 is disposed in the longitudinal direction of the electrode member 105, and the protrusion 10712 is disposed in the width direction of the electrode member 105.

The tab 1072 is formed to protrude outward from the protrusion 10712 along the width direction of the electrode member 105.

In this embodiment, the electrode member 105 is configured to have a width that allows two electrodes to be formed. For example, the electrode member 105 may be configured to have a length of several meters (m) to dozens of meters (m).

Specifically, for example, the electrode is arranged so that each tab 1072 corresponds to the uncoated portion 1053 of the electrode member 105, passes through the center of the width of the electrode member 105, and extends in the longitudinal direction. It may be formed in a shape arranged symmetrically with respect to the arranged center line.

The notching device 100 for an electrode for a secondary battery of this embodiment includes a lower mechanism 300 disposed below the electrode member 105 movable along the longitudinal direction, and a lower mechanism 300 that is raised and lowered on the upper side of the electrode member 105. It is provided with an upper mechanism 400 that can be provided.

The lower mechanism 300 is provided with a plurality of upper mechanism guides 320 that guide the raising and lowering of the upper mechanism 400.

In this embodiment, the plurality of upper mechanism guides 320 may be implemented as four, for example.

The plurality of upper mechanism guides 320 are formed to protrude upward from the lower mechanism 300.

The upper mechanism 400 is coupled to the plurality of upper mechanism guides 320 to enable relative movement.

The upper mechanism 400 is lifted and lowered along the plurality of upper mechanism guides 320.

The lower mechanism 300 includes, for example, a lower base 310 of a square shape.

The plurality of upper mechanism guides 320 are coupled to the lower base 310.

The plurality of upper mechanism guides 320 are respectively disposed at four corners of the lower base 310.

Lower ends of the plurality of upper mechanism guides 320 are each fixedly coupled to the lower base 310.

The four upper mechanism guides 320 are arranged to protrude upward from each of the four corners of the lower base 310.

The upper mechanism 400 includes, for example, an upper base 410 of a square shape.

Upper mechanism guide receiving portions 4102 in which the plurality of upper mechanism guides 320 are accommodated are formed at four corners of the upper base 410, respectively.

The upper mechanism guide receiving portion 4102 is formed to penetrate the upper base 410.

A plurality of coupling holes 4101 for coupling peripheral components are formed through the upper base 410.

Although not specifically shown in the drawings, the upper base 410 is coupled to a lifting drive unit that lifts and drives the upper mechanism 400.

Meanwhile, the notching unit 110 is provided with a notching punch 120 having a shape corresponding to the shape of the electrode 107 and a notching die 130 corresponding to the shape of the electrode 107.

For example, the notching unit 110 is provided with a notching stripper 140 that has a shape corresponding to the shape of the electrode 107 and supports the electrode member 105 when notching the electrode 107. .

The precut unit 210 includes a precut punch 220 having a shape corresponding to the shape of the cutting part 106 and a precut die 230 having a shape corresponding to the shape of the cutting part 106. Equipped with

In this embodiment, the notching punch 120 and the precut punch 220 are provided in the upper mechanism 400.

The notching die 130 and the precut die 230 are provided in the lower mechanism 300.

Specifically, the upper base 410 is provided with a punch holder 430 that supports the notching punch 120 and the precut punch.

The punch holder 430 is formed of a plate-shaped member.

The lower base 310 is provided with a die holder 330 that supports the notching die 130 and the precut die 230.

FIG. 7 is a perspective view of the lower mechanism of the notching device for the secondary battery electrode of FIG. 1, and FIG. 8 is a perspective view of the upper mechanism of the notching device for the secondary battery electrode of FIG. 1. As shown in Figure 7, the lower base 310 is provided with a plurality of upper mechanism guides 320 to protrude upward.

The lower mechanism 300 is provided with a die holder 330 that supports the notching die 130 and the precut die 230.

The die holder 330 is formed of, for example, a plate-shaped member.

For example, the die holder 330 may be configured to have a length corresponding to the length of the lower base 310.

The die holder 330 may be configured to have a reduced width compared to the width of the lower base 310.

A plurality of cut portions 3301 are formed in the die holder 330 to correspond to the upper mechanism guide 320.

The plurality of cut portions 3301 are implemented in four pieces.

The plurality of cut portions 3301 each have an arc shape.

The plurality of cut portions 3301 are respectively provided inside the plurality of upper mechanism guides 320.

For example, the notching die 130 may be provided in the die holder 330.

The notching die 130 is formed to penetrate the die holder 330 along the axial direction.

The notching die 130 may be formed to accommodate (insert) the notching punch 120 therein.

Here, the axial direction refers to a direction parallel to the moving direction of the notching punch 120 during notching.

As shown in FIG. 4, a penetrating portion 3101 is formed in the lower base 310 to correspond to the notching die 130 by penetrating the plate surface.

As a result, scrap (not shown) that is separated from the electrode member 105 and passes through the notching die 130 and the penetrating portion 3101 may fall downward and be collected.

The notching die 130 includes, for example, an outer notching die 1301 forming an outer edge of each electrode 107 and an inner notching die 1302 forming an inner edge of each electrode 107. Equipped with

In this embodiment, the electrode member 105 and the notching unit 110 are configured so that four electrodes 107 can be formed when notching (punching) once.

That is, two electrodes 107 are arranged in the width direction of the electrode member 105, and two electrodes 107 are arranged in the longitudinal direction of the electrode member 105, so that when notching one time, four electrodes 107 are simultaneously is formed

In this embodiment, the outer notching die 1301 may be implemented as two pieces.

The inner notching die 1302 is implemented as one piece.

The inner notching die 1302 may be disposed between (center) the outer notching die 1301.

The die holder 330 may be provided with a plurality of precut dies 230.

The plurality of precut dies 230 consists of four pieces.

The plurality of precut dies 230 have, for example, a cylindrical shape.

The plurality of precut dies 230 are respectively disposed at positions corresponding to the outside of the base 10711 of the electrode 107 and in front of the protrusion 10712.

The plurality of precut dies 230 are disposed at a position (potential) ahead of the notching die 130 based on the moving direction of the electrode member 105.

As a result, the electrode member 105 first reaches the precut die 230, forms the cutting portion 106, and then moves to the notching die 130 to perform notching.

The die holder 330 is provided with a plurality of punch holder guide receiving portions 3302 in which the punch holder guide 440, which will be described later, is accommodated to allow relative movement.

As shown in Figure 8, the upper base 410 is formed with a plurality of upper mechanism guide receiving portions 4102 in which the plurality of upper mechanism guides 320 are accommodated to allow relative movement.

The upper mechanism 400 includes a punch holder 430 that supports the notching punch 120 and the precut punch 220.

The notching punch 120 is coupled to the punch holder 430 to enable relative movement.

The notching punch 120 includes, for example, an outer notching punch 1201 that forms an outer edge of the electrode 107 and an inner notching punch 1202 that forms an inner edge of the electrode 107. .

The punch holder 430 is provided with a notching stripper 140 that supports the electrode member 105 when notching the notching punch 120.

Specifically, the notching stripper 140 has, for example, a width corresponding to the width of the electrode member 105.

The notching stripper 140 has a length greater than that of the two pairs of electrodes 107.

The notching punch 120 is configured to protrude further along the axial direction with respect to the notching stripper 140.

As a result, when the notching punch 120 is notched, the notching stripper 140 is in contact with the upper surface of the electrode member 105 and supports the electrode member 105, and the notching punch 120 is in contact with the upper surface of the electrode member 105. It protrudes further in the axial direction (lower side in the drawing) with respect to the notching stripper 140 and is inserted into the notching die 130 to notch (cut) the edge of the electrode 107.

For example, the notching stripper 140 includes an outer notching punch receiving portion 1401 and an inner notching portion so that the outer notching punch 1201 and the inner notching punch 1202 can be accommodated for relative movement along the axial direction. Each punch receiving portion 1402 is provided.

The punch holder 430 is provided with a plurality of punch holder guides 440 that guide the punch holder 430 so that the notching punch 120 can be placed in an accurate position with the notching die 130.

The plurality of punch holder guides 440 may be implemented as four, for example.

The plurality of punch holder guides 440 each protrude downward from the punch holder 430 along the axial direction.

The plurality of punch holder guides 440 are accommodated and coupled to the above-described punch holder guide receiving portion 3302 to enable relative movement.

The plurality of pre-cut punches 220 are coupled to the punch holder 430 to enable relative movement.

The punch holder 430 is provided with a precut stripper 240 that supports the electrode member 105 when cutting with the plurality of precut punches 220.

The precut punch 220 is configured to protrude more along the axial direction compared to the precut stripper 240.

When cutting with the precut punch 220, the precut stripper 240 is lowered into contact with the upper surface of the electrode member 105 to support the electrode member 105, and the precut punch 220 is As the precut stripper 240 protrudes (descends) further along the axial direction and is inserted into the precut die 230, the electrode member 105 is cut to form the electrode member 105 with the cutting unit 106. ) is formed.

FIG. 9 is a view showing the lowered state of the upper mechanism of the notching device for the secondary battery electrode of FIG. 1, and FIG. 10 is a view showing the electrode member notched and cut by the notching device for the secondary battery electrode of FIG. 1. As shown in FIG. 9, one end of the electrode member 105 is installed to be horizontally movable passing between the lower mechanism 300 and the upper mechanism 400.

The bottom surface of the electrode member 105 moves via the upper surface of the die holder 330 of the lower mechanism 300.

When the punch holder 430 of the upper mechanism 400 descends, the notching stripper 140 and the precut stripper 240 descend and come into contact with the upper surface of the electrode member 105.

As a result, the bottom surface of the electrode member 105 is in contact with the die holder 330, and the upper surface is supported by being pressed toward the die holder 330 by the notching stripper 140 and the precut stripper 240. do.

When the precut punch 220 and the notching punch 120 are lowered, as shown in FIG. 10, the cutting portion 106 is formed on one side (left side in the drawing) of the electrode member 105. , a border of the electrode 107 is formed on the other side (right side in the drawing).

Specifically, when the precut punch 220 is lowered than the precut stripper 240 and inserted into the precut die 230, the precut punch 220 is attached to both sides of the electrode member 105. ) The shape corresponding to is cut to form the cutting portion 106.

The cutting portions 106 each have a semicircular shape open outward along the width direction of the electrode member 105.

The cutting unit 106 is an electrode 107 disposed in front (on the right side in the drawing) based on the moving direction of the electrode member 105 among the two pairs of electrodes disposed along the longitudinal direction of the electrode member 105. ) are formed in the outer area of the base 10711 and in the outer area of the base 10711 of the electrode 107 disposed at the rear (left side in the drawing).

As a result, when notching the two pairs of electrodes 107, the outer region of the base 10711 of the right electrode 107 is most frequently broken, and the base 10711 of the left electrode 107 is next most frequently broken. When each of the cutting portions 106 is formed in the outer area of When notching, the occurrence of fracture of the electrode member 05 can be significantly reduced.

In this embodiment, when notching once by the notching punch 120, two pairs of electrodes 107 are continuously formed at a constant interval (pitch) along the longitudinal direction of the electrode member 105.

Figure 11 is a perspective view of a notching device for a secondary battery electrode according to another embodiment of the present invention, Figure 12 is a front view of the notching device for a secondary battery electrode of Figure 11, and Figure 13 shows the lowered state of the upper mechanism of Figure 12. It is a drawing, and FIG. 14 is a view simultaneously showing the notching device and the electrode member of the secondary battery electrode of FIG. 11. As shown in FIGS. 11 to 13, the notching device 100a for a secondary battery electrode of this embodiment includes a notching unit 110 and a precut unit 210a.

The notching unit 110 is configured to form an edge of the electrode 107 by notching the electrode member 105 moving along the longitudinal direction.

The precut unit 210a is configured to form a cutting portion 106 on the electrode member 105 by cutting the outer area of the edge of the electrode 107 into a preset shape.

The notching unit 110 includes, for example, a lower notching mechanism 300a disposed below the electrode member 105 and an upper notching mechanism 400a disposed above the electrode member 105. .

The notching unit 110 is comprised of a notching punch 120 having a shape corresponding to the shape of the electrode 107 and a notching die 130 having a shape corresponding to the shape of the electrode 107. .

The precut unit 210a includes a precut punch 220 having a shape corresponding to the shape of the cutting part 106 and a precut die 230 having a shape corresponding to the shape of the cutting part 106. Equipped with

For example, the precut unit 210a includes a precut lower mechanism 300a disposed below the electrode member 105 and a precut upper mechanism 400a disposed above the electrode member 105. is provided.

The precut unit 210a is disposed at a position (potential) closer to the notching unit 110 based on the starting position of the electrode member 105.

Specifically, when the electrode member 105 starts from the left side of the notching device 100a of the secondary battery electrode, the precut unit 210a is disposed on the left side of the notching unit 110.

The notching lower mechanism 300a includes, for example, a notching lower base 310a and a notching die 130 provided on the notching lower base 310a.

The notching lower mechanism 300a is provided with a plurality of notching upper mechanism guides 320a that support the notching upper mechanism 400a so that they can be raised and lowered.

The notching lower base 310a is provided with a notching die holder 330a that supports the notching die 130.

The notching upper mechanism 400a includes, for example, a notching upper base 410a and a notching punch 120 capable of moving relative to the notching upper base 410a.

A notching upper mechanism guide receiving portion in which the notching upper mechanism guide 320a is accommodated to enable relative movement is formed in the notching upper base 410a.

A notching punch holder 430a supporting the notching punch 120 is provided on the notching upper base 410a.

The precut lower mechanism 300b includes a precut lower base 310b and a precut die 230 provided on the upper surface of the precut lower base 310b.

A precut die holder 330b supporting the precut die 230 is provided on the upper surface of the precut lower base 310b.

The pre-cut lower mechanism 300b is provided with a pre-cut upper mechanism guide 320b that guides the pre-cut upper mechanism 400b to enable it to be raised and lowered.

The precut upper mechanism 400b is comprised, for example, of a precut upper base 410b and a precut punch 220 capable of relative movement with respect to the precut upper base 410b.

The pre-cut upper base (410b) can be lifted and lowered by being coupled to the pre-cut upper mechanism guide (320b).

The precut upper base 410b is provided with a precut punch holder 430b that supports the precut punch 220.

Meanwhile, in this embodiment, the notching device 100a of the secondary battery electrode is provided with a connecting member 450 connecting the notching unit 110 and the precut unit 210a.

One end of the connecting member 450 is coupled to the notching unit 110 and the other end is coupled to the precut unit 210a.

Specifically, one end (right end in the drawing) of the connecting member 450 is connected to the notching upper base 410a of the notching unit 110, and the other end (left end in the drawing) is connected to the precut unit ( It is connected to the precut upper base (410b) of 210a).

Accordingly, when the notching upper mechanism 400a of the notching unit 110 is raised or lowered, the pricker upper mechanism 400b of the precut unit 210a can be raised or lowered.

According to this configuration, the precut unit 210a can exclude the use of a separate driving unit for raising and lowering the precut upper mechanism 400b.

For example, the connecting member 450 may be configured to have a “T” shape in cross section.

For example, the connecting member 450 may include a contact portion 4501 that contacts the notching upper mechanism 400a and a protrusion 4502 protruding from the contact portion 4501.

The connecting member 450 may be fastened to the notched upper base 410a by a plurality of screws 460.

The notched upper base 410a may be provided with a female screw portion 462 to which the plurality of screws 460 are screwed.

Screw holes 461 into which the plurality of screws 460 are inserted may be formed through each of the connecting members 450.

For example, the precut upper base 410b may be provided with a sliding coupling portion 470 so that the connecting member 450 can be slidably coupled to the precut upper base 410b.

As a result, the connecting member 450 and the precut upper mechanism 400 can be easily combined and separated.

For example, the sliding coupling portion 470 may be implemented in an “L” shape in cross section.

The sliding coupling portion 470 may be configured to support the contact portion 4501 of the connecting member 450.

The sliding coupling portion 470 includes, for example, a protrusion 4701 protruding from the precut upper base 410b and a bent portion 4702 bent from the protrusion 4701.

The sliding coupling portion 470 may be composed of a pair in which the bent portion 4702 is spaced apart from each other at a distance into which the protruding portion 4502 of the connecting member 450 can be inserted.

As shown in FIG. 14, the notching punch 120 may be configured to form two pairs of electrodes 107 along the longitudinal direction of the electrode member 105, similar to the above-described embodiment. .

As in the above-described embodiment, the precut punch 220 is applied to the outside of the base 10711 of each electrode 107 and the protrusion 10712 of the electrode 107 along the width direction of the electrode member 105. ) are disposed so that the cutting portions 106 can be formed at positions corresponding to the front of the ).

By this configuration, the electrode member 105 is movably installed via the precut unit 210a and the notching unit 110.

When the notching upper mechanism 400a of the notching unit 110 is lowered, two pairs of cutting parts 106 are formed on one side (left side in the drawing) of the electrode member 105 by the precut unit 210a. Each is formed.

At the same time, two pairs of electrodes 107 are notched on the other side (right side in the drawing) of the electrode member 105 by the notching unit 110.

The two pairs of electrodes 107 are formed continuously at regular intervals (pitch) along the longitudinal direction of the electrode member 105.

Figure 15 is a plan view of a notching device for an electrode for a secondary battery according to another embodiment of the present invention. As shown in FIG. 15, the notching device 100b for a secondary battery electrode of this embodiment includes a notching unit 110 and a precut unit 210b.

The notching unit 110 is configured to form an edge of the electrode 107 by notching the electrode member 105 moving along the longitudinal direction.

The precut unit 210b is configured to form a cutting portion 106 on the electrode member 105 by cutting the outer area of the edge of the electrode 107 into a preset shape.

The notching unit 110 is comprised of a notching punch 120 having a shape corresponding to the shape of the electrode 107 and a notching die 130 having a shape corresponding to the shape of the electrode 107. .

The precut unit 210b includes a precut punch 220 having a shape corresponding to the shape of the cutting part 106 and a precut die 230 having a shape corresponding to the shape of the cutting part 106. It is comprised of:

The notching device 100b for an electrode for a secondary battery of this embodiment includes a lower mechanism 300 disposed below the electrode member 105 and an upper mechanism 400 disposed to be capable of being raised and lowered above the electrode member 105. Equipped with

The lower mechanism 300 is provided with an upper mechanism guide 320 that guides the upper mechanism 400 so that it can be raised and lowered.

The notching unit 110 is configured to form an edge of the electrode 107 by notching the long strip-shaped electrode member 105.

The notching unit 110 includes a notching punch 120 and a notching die 130 corresponding to the edge shape of the electrode 107.

In this embodiment, the notching unit 110 has the same configuration as the embodiment described above with reference to FIGS. 1 to 10, and therefore detailed description thereof will be omitted.

The precut unit 210b is configured to form a cutting portion 106 on the electrode member 105 by cutting the outer area of the edge of the electrode 107 into a preset shape.

The precut unit 210b is disposed at a position closer to the starting position of the electrode member 105 along the moving direction of the electrode member 105 than the notching unit 110.

Accordingly, in the notching device 100b of the secondary battery electrode of this embodiment, the cutting portion 106 is first formed in the outer area of the edge of the electrode 107 while the electrode member 105 is moved along the longitudinal direction, The area where the cutting portion 106 is formed is moved to the notching unit 110 and notched, thereby forming the edge of the electrode 107.

Meanwhile, in this embodiment, the precut unit 210b is a pair of electrodes 107 disposed on one side (right side in the drawing) of the two pairs of electrodes 107 formed by the notching unit 110. A pair of cutting portions 106 can be formed in an area corresponding to the outside of the base 10711 and in front of the protrusion 10712.

As a result, the configuration of the precut unit 210b is simplified and manufacturing can be easily performed.

For example, the precut unit 210b includes a pair of precut punches 220 and a precut die 230 symmetrically disposed on both sides along the width direction of the electrode member 105. do.

The precut punch 220 is provided in the upper mechanism 400.

The precut die 230 is provided in the lower mechanism 300.

In this embodiment, the cutting portion 106 is not formed on the outside of the pair of electrodes 107 disposed on the other side (left side in the drawing) of the two pairs of electrodes.

According to this configuration, the cutting portion 106 is formed in the area corresponding to the outside of the base 10711 of the right pair of electrodes 107 where fracture is most frequent among the two pairs of electrodes 107 formed by notching. By doing so, the occurrence of fracture of the electrode member 105 can be significantly reduced.

FIG. 16 is a plan view of a notching device for a secondary battery electrode according to another embodiment of the present invention, FIG. 17 is an enlarged view of the cutting portion of the electrode member of FIG. 16, and FIG. 18 is a perspective view of the cutting device of FIG. 16. , FIG. 19 is a diagram showing the arrangement of the cutting device, electrode member, and support pad of FIG. 18, and FIG. 20 is a plan view of a notching device for an electrode for a secondary battery according to another embodiment of the present invention. As shown in FIG. 16, the notching device 100c for a secondary battery electrode of this embodiment includes a notching unit 110 and a precut unit 210c.

The notching unit 110 is configured to form an edge of the electrode 107 by notching the electrode member 105 moving along the longitudinal direction.

Meanwhile, the precut unit 210c of this embodiment is configured to form a cutting portion 106a on the electrode member 105 by cutting the outer area of the edge of the electrode 107 into a preset shape.

In this embodiment, the notching unit 110 and the precut unit 210c may be configured to be separated from each other, for example, as described above with reference to FIGS. 11 to 14.

Although not specifically shown in the drawings, the notching unit 110 and the precut unit 210c, which are formed separately from each other, may be interconnected by the above-described connecting member 450.

As a result, when the notching unit 110 is raised and lowered, the precut unit 210c can be lifted and driven in conjunction with it.

According to this configuration, the use of a separate driving unit for driving the precut unit 210c can be eliminated.

The notching unit 110 includes, for example, a notching lower mechanism 300a disposed below the electrode member 105 and an upper side of the electrode member 105, as described above with reference to FIGS. 11 to 14. It is provided with a notching upper mechanism (400a) disposed in.

For example, the precut unit 210c includes a precut lower mechanism 300b disposed below the electrode member 105 and a precut upper mechanism 400b disposed above the electrode member 105. is provided.

The precut unit 210c is disposed at a position (potential) closer to the notching unit 110 based on the starting position of the electrode member 105.

Specifically, when the electrode member 105 starts from the left side of the notching device 100c of the secondary battery electrode, the precut unit 210c is disposed on the left side of the notching unit 110.

For example, the notching unit 110 includes a notching punch 120 having a shape corresponding to the shape of the electrode 107 and a notching die 130 having a shape corresponding to the shape of the electrode 107. It is comprised of:

Meanwhile, the precut unit 210c is provided with, for example, a precut punch 220c that forms cutting portions 106a of a preset shape on both sides along the width direction of the electrode member 105. It can be configured.

In this embodiment, the notching unit 110 has one pair (two) electrodes 107 disposed along the width direction of the electrode member 105, and two electrodes 107 are disposed along the longitudinal direction. When notching once, four electrodes 107 can be formed.

In this embodiment, the precut unit 210c may be configured to form a pair (two) of cutting portions 106a along the width direction of the electrode member 105.

Meanwhile, in this embodiment, the precut unit 210c is a cutting unit in the outer area of the base 10711 of the two pairs of electrodes 107 where breakage occurs frequently when notching the two pairs of electrodes 107. (106a) may be configured to be formed, respectively.

The precut unit 210c can form four cutting portions 106a to correspond to the four electrodes 107.

As shown in FIG. 17, the cutting portion 106a formed by the precut unit 210c includes a linear section 106a1 cut linearly from the outside to the inside of the electrode member 105 and the linear section. It has a curved section 106a2 extending in a curved shape from 106a1 toward the uncoated portion 1053.

By providing the cutting portion 106a with the curved section 106a1, fracture occurring from the outside to the inside of the electrode member 105 can be suppressed.

Here, the linear section 106a1 is formed to be inclined inward and forward based on the moving direction of the electrode member 105.

For example, the linear section 106a1 may be formed to form an inclination angle θ of 20 to 80 degrees with respect to the moving direction of the electrode member 105.

An attachment 1055 forming an acute angle may be formed on the electrode member 105 around the cutting portion 106a.

The curved section 106a2 may be placed in front (on the right side of the drawing) of the linear section 106a1 based on the moving direction of the electrode member 105.

A curved protrusion 1056 corresponding to the shape of the curved section 106a1 is formed inside the curved section 106a2.

According to this configuration, the connection area of the attachment 1055 and the curved protrusion 1056 separated by the formation of the cutting portion 106 is in a state in which flow can easily occur.

However, when the electrode member 105 is moved, the connection area connecting the attachment 1055 and the curved protrusion 1056 is disposed toward the rear of the moving direction of the electrode member 105, so that the attachment area 1055 ) and the occurrence of folding or curling of the curved protrusions 1056 can be suppressed.

Additionally, fracture of the electrode member 105 due to folding or curling of the attachment 1055 and the curved protrusion 1056 can be suppressed.

In this embodiment, the precut unit 210c may be configured to include a precut punch 220c so that cutting portions 106a can be formed on both sides along the width direction of the electrode member 105. .

For example, as shown in FIG. 18, the precut punch 220c has a hook shape having a linear section 221c1 and a curved section 221c2 bent in a curved shape at the end of the linear section 221c1. It may be configured with a cutting mechanism 221c.

For example, the cutting mechanism 221c includes a body 222 having the linear section 221c1 and the curved section 221c2, and the lower mechanism at one end (lower part in the drawing) of the body 222. It is comprised of a blade 223 whose cross-sectional width is gradually reduced toward the (300) side. The blade 223 of the cutting mechanism 221c is, for example,

In this embodiment, the cutting device 221c may be arranged so that the cutting portion 106a can be formed at a position corresponding to the outer area of the base 10711 of the two pairs of electrodes 107.

The cutting mechanism 221c may be composed of two pairs (four pieces).

In this embodiment, the precut unit 210c is provided with a support pad 225 disposed below the cutting device 221c to support the electrode member 105.

In this embodiment, the support pads 225 may be implemented as two pairs (four pieces).

For example, the support pad 225 may be formed in the shape of a substantially square plate, as shown in FIGS. 16 and 19.

The support pad 225 may be made of a material with lower hardness than the cutting device 221c.

The support pad 225 may be formed of an elastic member.

Specifically, the support pad 225 may be implemented as a rubber member or a synthetic rubber member.

As a result, damage to the blade of the cutting mechanism 221c can be suppressed.

Meanwhile, the notching device 100d for a secondary battery electrode according to another embodiment of the present invention is comprised of a notching unit 110 and a precut unit 210d, as shown in FIG. 20.

For example, the notching unit 110 includes a notching punch 120 having a shape corresponding to the shape of the electrode 107 and a notching die 130 having a shape corresponding to the shape of the electrode 107. It is comprised of:

The notching unit 110 may be configured to form two pairs of electrodes 107 when notching once.

The precut unit 210d may be configured by, for example, a precut punch 220c that forms cutting portions 106a of a preset shape on both sides along the width direction of the electrode member 105. You can.

In this embodiment, the notching unit 110 and the precut unit 210d are formed separately from each other, as described above, and can be configured to be interoperably connected to each other by the connecting member 450 described above. there is.

In this embodiment, the precut unit 210d may be configured to form a pair (two) of cutting portions 106a along the width direction of the electrode member 105.

Specifically, in this embodiment, the precut unit 210d is the electrode ( It may be configured to form the cutting portion 106a in the outer area of the base 10711 of 107).

As a result, the occurrence of fracture during notching of the electrode member 105 can be significantly reduced.

With this configuration, when the notching upper mechanism is lowered, the precut upper mechanism is lowered in conjunction with it.

When the cutting mechanism 221c of the precut unit 210d is lowered, the cutting portions 106a are formed on each of the electrode members 105.

At the same time, when the notching punch 120 of the notching unit 110 is lowered, the edges of the two pairs of electrodes 107 are notched.

When the cutting and notching are completed, the electrode member 105 is moved at a preset interval along the longitudinal direction, and the cutting mechanism 221c of the precut unit 210d and the notching punch 120 of the notching unit 110 ) simultaneously descends to continuously produce the electrode 107 by repeating the process of forming the cutting portion 106a and the electrode, respectively.

At this time, the cutting portions 106a of the electrode member 105 are formed in areas where breakage occurs frequently when the two pairs of electrodes 107 are notched, so that when the electrode member 107 is notched, the electrode member 105 ) can be significantly suppressed.

In the above, specific embodiments of the present invention have been shown and described. However, since the present invention can be implemented in various forms without departing from its spirit or essential characteristics, the embodiments described above should not be limited by the specific details for carrying out the invention.

In addition, even if the embodiments are not individually listed in the detailed description described above, they should be interpreted broadly within the scope of the technical idea defined in the attached claims. In addition, all changes and modifications included within the technical scope of the above claims and their equivalents shall be encompassed by the attached claims.

Claims (19)

A notching unit that has a strip shape and forms an edge of the electrode by notching the electrode member moved along the longitudinal direction; and
It includes a pre-cut unit that forms a cutting part in the electrode member by cutting the outer area of the edge of the electrode into a preset shape,
The precut unit is disposed at a position closer to the notching unit based on the starting position of the electrode member, and forms the cutting portion before the electrode member reaches the notching unit. According to paragraph 1,
The electrode member has a coated portion coated with the active material and an uncoated portion not coated with the active material,
A notching device for an electrode for a secondary battery, wherein the cutting part cuts a portion of the uncoated part and the coated part. According to paragraph 1,
A notching device for an electrode for a secondary battery, wherein the cutting portion has a curved shape open to the outside along the width direction of the electrode member. According to paragraph 1,
The cutting unit is a notching device for a secondary battery electrode, including a linear section cut linearly from the outside to the inside of the electrode member and a curved section extending in a curved shape from the linear section toward the outside of the electrode member. According to paragraph 4,
A notching device for an electrode for a secondary battery, wherein the curved section is disposed in front of the linear section based on the moving direction of the electrode member. According to paragraph 4,
The notching device for an electrode for a secondary battery in which the linear section is formed to be inclined inward and forward based on the moving direction of the electrode member. According to any one of claims 3 to 6,
A notching device for a secondary battery electrode, wherein the electrode and the cutting portion are each formed symmetrically with respect to a longitudinal center line of the electrode member. In clause 7,
The electrodes are formed in plural pairs,
A notching device for an electrode for a secondary battery, wherein the cutting portion is formed on the outside of a pair of electrodes disposed in front along the moving direction of the electrode member. In clause 7,
The electrodes are formed in plural pairs,
A notching device for secondary battery electrodes wherein the cutting portion is formed on the outside of each of the plurality of pairs of electrodes. According to paragraph 1,
The notching unit includes a lower notching mechanism disposed below the electrode member and an upper notching mechanism disposed above the electrode member,
The precut unit is a notching device for electrodes for secondary batteries, including a precut lower mechanism disposed below the electrode member and a precut upper mechanism disposed above the electrode member. According to clause 10,
It further includes a connecting member, one end of which is connected to the notching upper mechanism and the other end of which is connected to the precut upper mechanism,
A notching device for secondary battery electrodes in which the precut upper mechanism is interlocked with the notching upper mechanism by the connecting member. According to clause 11,
The notched upper mechanism is provided with a connecting member coupling portion to which one end of the connecting member is coupled,
A notching device for an electrode for a secondary battery, wherein the precut upper mechanism is provided with a sliding coupling portion to which one end of the connecting member is slidably coupled. According to paragraph 1,
a lower mechanism provided below the electrode member; and
It further includes; an upper mechanism provided on the upper side of the electrode member to be capable of being raised and lowered;
The notching unit includes a notching punch having a shape corresponding to the shape of the electrode and a notching die having a shape corresponding to the shape of the electrode,
The precut unit is provided with a precut punch having a shape corresponding to the shape of the cutting part,
The notching punch and the precut punch are a notching device for an electrode for a secondary battery provided in the upper mechanism. According to clause 13,
The precut unit further includes a precut die having a shape corresponding to the shape of the cutting part,
The notching die and the precut die are notching devices for secondary battery electrodes provided in the lower mechanism. According to clause 14,
The precut punch is a notching device for secondary battery electrodes having a circular rod shape. According to clause 13,
The precut punch is a notching device for secondary battery electrodes including a hook-shaped cutting mechanism having a linear section and a curved section bent in a curved shape at the end of the linear section. According to clause 16,
In the cutting device, the curved section is disposed in front of the linear section based on the moving direction of the electrode member,
The notching device for an electrode for a secondary battery, wherein the linear section is inclined toward the inner front along the width direction of the electrode member. According to clause 16,
The cutting mechanism is a notching device for secondary battery electrodes, including a body having the linear section and the curved section, and a blade formed at the bottom of the body to gradually decrease in width toward the lower mechanism. According to clause 18,
A notching device for an electrode for a secondary battery, wherein the lower mechanism is provided with a support pad disposed below the cutting mechanism to support the electrode member.