KR102521380B1 - Apparatus for trimming secondary battery electrode - Google Patents

Abstract

A secondary battery electrode trimming device for trimming a far end of a secondary battery electrode that is continuously supplied without interruption is disclosed. An apparatus for trimming a secondary battery electrode according to an embodiment of the present invention is a roller that supports the fabric and rotates in a direction in which the fabric travels, and includes a plurality of anvil rollers arranged sequentially and spaced apart from each other in the traveling direction of the fabric. (anvil roller); a plurality of trimming rollers positioned on opposite sides of each anvil roller with the fabric interposed therebetween to rotate forward in the traveling direction of the fabric and partially cut the fabric; a buffer belt that circulates along a caterpillar path in close contact with the outer circumferential surface of the anvil roller; and a shock absorber belt guide roller located downstream of the anvil roller along the moving direction of the fabric, wherein each of the plurality of trimming rollers has a cylindrical roller core and is bent along an outer circumferential surface of the roller core. and a metal sheet having an inner surface attached to the outer circumferential surface of the roller core, and a blade sheet having at least one protruding blade protruding from the outer surface of the metal sheet to cut the fabric. .

Description

Secondary battery electrode trimming device {Apparatus for trimming secondary battery electrode}

The present invention relates to a secondary battery electrode trimming device that shears and processes continuously supplied secondary battery electrodes into a preset shape.

A secondary battery is a battery capable of being recharged, and is configured to repeat charging and discharging by moving ions in an electrolyte between an anode and a cathode insulated by a separator. An electrode such as a positive electrode and a negative electrode of a secondary battery commonly includes an electrode current collector and an electrode material made of an electrode active material applied on the electrode current collector. The electrode current collector may be, for example, a sheet or foil made of aluminum (Al) or copper (Cu). An area where the electrode material is laminated on the electrode current collector is referred to as a holding portion, and an area where the electrode current collector is exposed without the electrode material being laminated is referred to as a non-coating portion.

The secondary battery electrode is formed by shearing a web of a secondary battery electrode in which an electrode material is laminated on an electrode current collector to form an electrode tab and a notch at the end of the web in the width direction of the web, and the web of the web is used as a battery cell. It is manufactured through the process of cutting into unit electrodes constituting a cell. Forming the electrode tab and the notch is called a trimming or notching process. Conventionally, secondary battery electrodes are generally trimmed using a punching press or using a laser cutting machine. The method of trimming the secondary battery electrode using a punching press has a problem in that the productivity of the trimming work is lowered and the work noise is very high because the fabric must be stopped when the punching press moves up and down to punch. In addition, the method of trimming the secondary battery electrode using a laser cutting machine has a problem in that the laser cutting machine is expensive, so the operation cost is high, the productivity is low, and the cutting quality is poor, such as a rough cutting surface.

Republic of Korea Patent Registration No. 10-1342711

The present invention provides a secondary battery electrode trimming apparatus including a plurality of trimming rollers along the travel path of a fabric of a secondary battery electrode, and each of the plurality of trimming rollers includes a blade sheet detachably attached to a cylindrical roller core. do.

The present invention is a device for trimming a fabric of a secondary battery electrode that is continuously supplied without interruption, and is a roller that supports the fabric and rotates in the direction of movement of the fabric, spaced apart along the direction of movement of the fabric. A plurality of anvil rollers arranged sequentially so that the fabric is interposed therebetween, and a plurality of trimming rollers disposed on opposite sides of each anvil roller to rotate forward in the traveling direction of the fabric and partially cut the fabric. The plurality of trimming rollers each include a cylindrical roller core, a metal sheet bent along an outer circumferential surface of the roller core and having an inner surface attached to the outer circumferential surface of the roller core, and A blade sheet having at least one protruding blade protruding from an outer surface of the metal sheet to cut the fabric, and a portion cut by any one of the plurality of trimming rollers in the fabric, Provided is a secondary battery electrode trimming device including a portion not cut by the remaining rollers among a plurality of trimming rollers.

The plurality of anvil rollers are provided with a pair, and the pair of anvil rollers include a first anvil roller and a second anvil roller positioned downstream of the first anvil roller along a moving direction of the fabric, A pair of a plurality of trimming rollers is provided, and the pair of trimming rollers include a first trimming roller located on the opposite side of the first anvil roller with the fabric interposed therebetween, and the second anvil roller with the fabric interposed therebetween. It may be provided with a second trimming roller located on the opposite side of.

An apparatus for trimming a secondary battery electrode of the present invention includes an upstream frame supporting the first anvil roller and the first trimming roller; and a downstream frame supporting the second anvil roller and the second trimming roller, wherein one of the upstream frame and the downstream frame moves relative to the other so as to move the first trimming roller and the second trimming roller. The distance between them can be adjusted.

Means for adjusting the distance between the first trimming roller and the second trimming roller include a servo motor, a ball screw rotating by power of the servo motor, and the upstream frame and the downstream side. A frame coupling member fixedly coupled to one of the frames and moving in a longitudinal direction of the ball screw as the ball screw rotates may be provided.

At least one protruding blade of the second trimming roller is divided into unit electrodes that cut the fabric in the width direction of the fabric at regular intervals in order to divide the fabric into unit electrodes constituting unit cells of a secondary battery. A blade is included, and the device for trimming a secondary battery electrode of the present invention includes a buffer belt that circulates along a caterpillar path in close contact with the outer circumferential surface of the second anvil roller, and a lower portion of the second anvil roller along the moving direction of the fabric. A buffer belt guide roller located downstream is further provided, and the unit electrodes passing between the second trimming roller and the second anvil roller and divided and discharged are in a section between the second anvil roller and the buffer belt guide roller. It can proceed while being supported by the buffer belt.

At least one protruding blade of the first trimming roller includes a notch forming blade on one side for forming a plurality of notches spaced apart on one side in the width direction of the fabric, and on the other side in the width direction of the fabric. A tab forming blade for forming a plurality of spaced apart tabs is included, and at least one protruding blade of the second trimming roller is formed on one side of the fabric in the width direction by the one side notch forming blade. One side trimming blade for cutting between a plurality of notches in the longitudinal direction of the fabric may be included.

The secondary battery electrode trimming device of the present invention may further include a buffer tube that surrounds an outer circumferential surface of at least one of the plurality of anvil rollers and is detachably coupled to the at least one anvil roller.

The secondary battery electrode trimming device of the present invention is in close contact with the outer circumferential surface of at least one of the plurality of anvil rollers, and a buffer belt that circulates along a caterpillar path and defines a caterpillar path of the buffer belt. a plurality of shock absorber belt guide rollers for driving the shock absorber belt, and a shock absorber belt pressurizer for pressing the shock absorber belt so that tension for running of the shock absorber belt is formed, wherein the shock absorber belt presser comprises the plurality of shock absorber belt guide rollers. a shock absorber belt pressure roller that is movable in the direction of pressing the shock absorber belt and the opposite direction so that the travel path of the shock absorber belt becomes a zigzag path between a pair of adjacent shock absorber belt guide rollers, and the shock absorber belt pressure An actuator may be provided to provide power for moving the roller in the direction of pressing the buffer belt and in the opposite direction.

The roller core has a magnet that forms a magnetic force to attract the metal sheet to an outer circumferential surface, and the metal sheet can be attached to or detached from the outer circumferential surface of the roller core by the magnetic force of the plurality of magnets. can be attached appropriately.

A hollow is formed in the roller core in its length direction, each of the plurality of trimming rollers further includes a roller shaft detachably fitted into the hollow of the roller core, and as the roller shaft rotates, The roller core and the blade sheet may rotate coaxially with the roller shaft.

The roller core has a roller core key groove dug inward from an inner circumferential surface of its hollow, and a roller shaft key groove dug inward from an outer circumference thereof is formed in the roller shaft, and the plurality of trimming rollers In a state where the roller core key groove and the roller shaft key groove are aligned, one side is detachably fitted into the roller core key groove and the other side is detachably fitted into the roller shaft key groove, so that the roller shaft A connection key for fixing the roller core may be further provided.

In the secondary battery electrode trimming device of the present invention, a plurality of trimming rollers sequentially cut and trim the fabric of a secondary battery electrode that runs at a constant speed. Therefore, work productivity is improved and the noise of the work process is greatly reduced compared to trimming using a punching press, work productivity and cutting quality of the trimmed surface are improved, and work costs are reduced compared to trimming using a laser cutter. .

The secondary battery electrode trimming device of the present invention can precisely adjust the distance between the trimming rollers spaced apart from each other along the moving direction of the fabric. Accordingly, tuning can be performed so that the portion of the fabric cut by the trimming roller disposed upstream and the portion of the fabric cut by the trimming roller disposed downstream are accurately offset along the moving direction of the fabric.

In addition, in the secondary battery electrode trimming device of the present invention, the blade sheet can be detachably attached to the roller core. Therefore, by attaching different types of blade sheets to the roller core, the fabric of the secondary battery electrode can be trimmed so that it can be processed into unit electrodes of various shapes and widths.

1 and 2 are a perspective view and a longitudinal sectional view of a secondary battery electrode trimming device according to an embodiment of the present invention.
FIG. 3 is an exploded perspective view of a first trimming roller and a second trimming roller of FIG. 2 .
4 is a bottom view showing the first blade sheet of the first trimming roller of FIG. 2 turned over so that the protruding blade protrudes downward, and FIG. 5 is a bottom view showing the second blade sheet of the second trimming roller of FIG. 2 with the protruding blade protruding downward. It is a bottom view shown inverted so that it protrudes into .
6 is a plan view showing the first blade sheet of FIG. 4 and the second blade sheet of FIG. 5 superimposed on a fabric for a secondary battery electrode.
7 is a bottom view showing another example of the second blade sheet of FIG. 5 upside down so that the protruding blade also protrudes downward.

Hereinafter, a secondary battery electrode trimming device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Terminologies used in this specification are terms used to appropriately express preferred embodiments of the present invention, which may vary according to the intention of a user or operator or conventions in the field to which the present invention belongs. Therefore, definitions of these terms will have to be made based on the content throughout this specification.

1 and 2 are perspective and longitudinal cross-sectional views of a secondary battery electrode trimming device according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of a first trimming roller and a second trimming roller of FIG. 2 , and FIG. 4 is FIG. 2 A bottom view showing the first blade sheet of the first trimming roller turned over so that the protruding blade protrudes downward, and FIG. 5 is a bottom view showing the second blade sheet of the second trimming roller of FIG. 2 turned over so that the protruding blade protrudes downward 6 is a plan view showing the first blade sheet of FIG. 4 overlapping the second blade sheet of FIG. 5 on a secondary battery electrode fabric, and FIG. 7 is a protruding blade showing another example of the second blade sheet of FIG. This is a bottom view shown inverted so that it protrudes downward. 1 to 3 together, the secondary battery electrode trimming device 100 according to an embodiment of the present invention is a trimming operation of cutting the fabric 3 of the secondary battery electrode continuously supplied to have a certain plane shape. It is a device that performs The trimming operation is an operation of forming notches 13 and 14 (see FIG. 6) on one side and the other side of the fabric 3 in the width direction, and a tab on the other side in the width direction of the fabric 3 ( tab) 11 (see FIG. 6).

The fabric 3 of the secondary battery electrode includes an electrode current collector 2 made of a metal material and an electrode material 1 in the form of a slurry applied on the electrode current collector 2 . The electrode current collector 2 may be a metal foil having a thickness of 3 to 100 μm, for example, copper (Cu) or aluminum (Al). The electrode material 1 may include an electrode active material, a conductive material, and a binder.

The secondary battery electrode trimming device 100 includes a downstream frame 101, an upstream frame 103, first and second anvil rollers 115 and 160, and first and second trimming rollers 120. , 180), and a buffer tube (117). The first anvil roller 115 and the second anvil roller 160 are rollers that support the original fabric 3 of the secondary battery electrode that continuously progresses without interruption and rotate in the direction of the original fabric 3. The second anvil roller 160 is located downstream of the first anvil roller 115 along the moving direction of the fabric 3 . The first anvil roller 115 and the second anvil roller 160 are rotated by power of different electric motors (not shown).

The first and second trimming rollers 120 and 180 are located on opposite sides of the first and second anvil rollers 115 and 160 with the fabric 3 interposed therebetween and rotate forward in the traveling direction of the fabric 3. And partially cut the fabric (3). Specifically, the first trimming roller 120 is positioned on the first anvil roller 115, and the second trimming roller 180 is positioned on the second anvil roller 160. The first trimming roller 120 and the second trimming roller 180 are rotated by power of different electric motors (not shown). The electric motors providing rotational power to the first trimming roller 120 and the second trimming roller 180 are different from the electric motors providing rotational power to the first and second anvil rollers 115 and 160. can

The upstream frame 103 rotatably supports the first trimming roller 120 and the first anvil roller 115 and includes an electric motor providing rotational power to the first trimming roller 120 and the first trimming roller 120 . An electric motor providing rotational power to the anvil roller 115 is fixedly supported. The downstream frame 101 rotatably supports the second trimming roller 180 and the second anvil roller 160 and includes an electric motor providing rotational power to the second trimming roller 180 and the second trimming roller 180 . An electric motor providing rotational power to the anvil roller 160 is fixedly supported.

The upstream frame 103 is supported by the downstream frame 101 so as to be movable in a direction parallel to the X-axis with respect to the downstream frame 101, that is, parallel to the moving direction of the original fabric 3. The downstream frame 101 is supported on the bottom surface where the secondary battery electrode trimming device 100 is installed by four spaced apart support feet 110 . An anti-vibration pad 111 that absorbs vibration caused by the trimming operation may be interposed between each support leg 110 and the bottom surface.

3 to 6 together, the first and second trimming rollers 120 and 180 include first and second cylindrical roller cores 121 and 181, respectively, and first and second trimming rollers 120 and 180. First and second blade sheets 135 and 195 detachably attached to and supported by the roller cores 121 and 181 and detachably coupled to the first and second roller cores 121 and 181 It is provided with first and second roller shafts (shaft) (130, 190).

The first and second blade sheets 135 and 195 are bent along the outer circumferential surfaces of the first and second roller cores 121 and 181, respectively, and are inside the outer circumferential surfaces of the first and second roller cores 121 and 181. Metal sheets 136 and 196 to which side surfaces are attached, and a plurality of protruding blades 140, 146 and 200 protruding from the outer surface of the metal sheets 136 and 196 to cut the fabric 3. The metal sheets 136 and 196 and the protruding blades 140, 146 and 200 are made of a metal material such as, for example, stainless steel. The first and second blade sheets 135 and 195 are formed, for example, by machining a metal plate after chemical etching, or by forming the protruding blades 140, 146, 200) can be formed by fixing and joining by welding. When the first and second blade sheets 135 and 195 are attached to the outer circumferential surfaces of the first and second roller cores 121 and 181, the plurality of protruding blades 140, 146 and 200 perform first and second trimming It protrudes in a radial direction that spreads outward with the rotation axes RX1 and RX2 of the rollers 120 and 180 as the center.

The first and second roller cores 121 and 181 further include a plurality of magnets 125 and 185 fixedly supported on outer circumferential surfaces. The plurality of magnets 125 and 185 are densely arranged at regular intervals on the outer circumferential surfaces of the first and second roller cores 121 and 181 . The metal sheets 136 and 196 of the first and second blade sheets 135 and 195 are formed of the first and second roller cores 121 and 181 by the magnetic force of the plurality of magnets 125 and 185. It is detachably attached to the outer circumferential surface.

The first and second roller cores 121 and 181 each have first alignment protrusions 127 and 187 and second alignment protrusions 128 and 188 protruding apart from each other on outer circumferential surfaces. The metal sheets 136 and 196 of the first and second blade sheets 135 and 195 have first alignment through holes 137 and 197 into which the first alignment protrusions 127 and 187 are fitted, and the second alignment protrusions. Second alignment through holes 138 and 198 into which 128 and 188 fit are formed. The metal sheet 136 so that the first alignment protrusions 127 and 187 and the second alignment protrusions 128 and 188 are inserted into the first alignment through holes 137 and 197 and the second alignment through holes 138 and 198, 196) on the outer circumferential surfaces of the first and second roller cores 121 and 181, the first and second blade sheets 135 and 195 form the first and second roller cores 121 and 181. attached to the correct location.

An error may occur in the distance between the first alignment protrusions 127 and 187 and the second alignment protrusions 128 and 188 and between the first alignment holes 137 and 197 and the second alignment holes 138 and 198. For example, the second alignment through holes 138 and 198 may have an elliptical shape extending to a length greater than the diameter of the second alignment protrusions 128 and 198 . As a result, the second alignment protrusions 128 and 198 may be fitted into the second alignment through holes 138 and 198 with a gap. The thickness of the metal sheets 136 and 196 may be, for example, 0.1 to 1.0 mm, and the heights of the plurality of protruding blades 140, 146 and 200 may be, for example, 0.05 to 5.0 mm.

The first and second roller cores 121 and 181 have hollows 123 and 183 in their longitudinal direction, that is, in the direction of the rotation axes RX1 and RX2 of the first and second trimming rollers 120 and 180. ) is formed, and the first and second roller shafts 130 and 190 are detachably inserted into the hollows 123 and 183. Specifically, on one side of the first and second roller cores 121 and 181 facing the front plate of the downstream frame 101, from the inner circumferential surface of the hollow 123 and 183 of the roller cores 121 and 181 to the inside. Fine roller core key grooves 124 and 184 are formed. In addition, on one side of the first and second roller shafts 130 and 190 facing the front plate of the downstream frame 101, there is a roller shaft key groove 131 dug inward from the outer circumferential surface of the roller shafts 130 and 190. , 191) is formed.

The first and second trimming rollers 120 and 180 further include connection keys 134 and 194, respectively. In a state where the roller core key grooves 124 and 184 and the roller shaft key grooves 131 and 191 are radially aligned with the rotation axes RX1 and RX2, one side of the connection keys 134 and 194 is It is detachably fitted into the roller core key grooves 124 and 184 and the other side is detachably fitted into the roller shaft key grooves 131 and 191, so that the first and second roller shafts 130 and 190 have the The first and second roller cores 121 and 181 are fixed.

Accordingly, the first and second roller shafts 130 and 190 are formed in the hollows 123 and 183 of the first and second roller cores 121 and 181 to which the first and second blade sheets 135 and 195 are attached. is inserted, and the first and second roller shafts 130 and 190 are in a state in which the connection keys 134 and 194 are inserted into the roller core key grooves 124 and 184 and the roller shaft key grooves 131 and 191 When rotated, the first and second roller cores 121 and 181 and the first and second blade sheets 135 and 195 connect to the first and second roller shafts 130 and 190 and the rotation axes RX1 and RX2 ) rotates coaxially around

The portion of the fabric 3 cut by the first trimming roller 120 includes a portion not cut by the second trimming roller 180, and conversely, the portion cut by the second trimming roller 180 in the fabric 3 The portion to be cut includes a portion not cut by the first trimming roller 120 . In other words, the first blade sheet 135 of the first trimming roller 120 includes a plurality of notches 13 spaced apart on one side of the fabric 3 in the width direction. A plurality of notches 140 for forming one side notch forming blade 140, and a plurality of tabs 11 spaced apart on the other side in the width direction of the fabric 3 and a plurality of notches 14 on the other side spaced apart. It includes a tab forming blade 146.

Each one-side notched blade 140 includes a width direction extension part 141 extending in the width direction of the fabric 3, that is, in the length direction of the first trimming roller 120, and the width direction extension part ( 141) and a slanted extension 142 extending obliquely with respect to the width direction of the fabric 3, and bent at the end of the fabric 3 inward of the width direction extension 141 to extend the slant A longitudinal extension 143 extending in the longitudinal direction of the fabric 3 toward 142, and connecting the longitudinal extension 143 and the oblique extension 142, and the one side notch 13 Correspondingly, the fabric 3 is provided with a notch protrusion 144 protruding inward. A plurality of notched blades 140 on one side are spaced apart from each other at regular intervals along the longitudinal direction of the fabric 3.

Each tab forming blade 146 extends in the width direction of the fabric 3 and a pair of width direction extensions 147 spaced apart from each other, extends in the longitudinal direction of the fabric 3, and both ends are A longitudinal extension portion 148 bent and connected to an end of the pair of widthwise extension portions 147 in the inner direction of the far end 3, and the longitudinal extension portion 148 corresponding to the other notch 14 In the middle of the fabric 3 is provided with a notch protrusion 149 protruding inward. A plurality of tab forming blades 146 are spaced apart from each other at regular intervals along the longitudinal direction of the fabric 3 . The notch protrusion 144 of the one-side notch forming blade 140 and the notch protrusion 149 of the tab forming blade 146 are an arbitrary straight line extending in the width direction of the fabric 3, that is, the Y axis and located on a parallel straight line.

The second blade sheet 195 of the second trimming roller 180 has a plurality of one-side notches 13 formed on one side of the fabric 3 in the width direction by the plurality of one-side notch forming blades 140 It includes a plurality of one-side trimming blades 200 for cutting between the fabrics 3 in the longitudinal direction. Each one-side trimming blade 200 extends in the width direction of the fabric 3 and has a pair of width direction extensions 201 spaced apart from each other, and extends in the longitudinal direction of the fabric 3 and both ends A lengthwise extension part 202 bent and connected to the end of the pair of widthwise extension parts 201 in the inner direction of the original fabric 3 is provided.

In FIGS. 4 and 5, the two-dot chain line in the horizontal direction is the edge 6 of one side in the width direction of the secondary battery electrode fabric 3, the boundary line 8 of the holding part of the fabric 3, and the fabric in order from the top. Indicates the other end edge 7 in the width direction of (3). A holding part 4 in which the electrode material 1 is laminated on the upper and lower surfaces of the electrode current collector 2 (see FIG. 2) in the region between the one end edge 6 and the holding part boundary line 8 And, in the area between the boundary line 8 of the holding part and the edge 7 of the other side, the electrode material 1 is not laminated on the upper and lower surfaces, so that the electrode current collector 2 is exposed, the uncoated portion 5 )am.

1 to 6 again, when the fabric 3 passes between the first anvil roller 115 and the first trimming roller 120, one side end of the fabric 3 in the width direction is one It is cut by the side notch forming blade 140 and is limited by the one side end edge 6 and one side notch forming blade 140 in the fabric 3, that is, the first scrap on one side ( 13) is separated and removed from the fabric 3. In addition, the other end of the fabric 3 in the width direction is cut by the tab forming blade 146 and is defined by the other end edge 7 and the tab forming blade 146 in the fabric 3 Part, that is, the other side scrap 15 is separated and removed from the fabric 3 .

Therefore, a plurality of one-side notches 13 spaced apart at regular intervals are formed on one side in the width direction of the secondary battery electrode fabric 3 passing between the first anvil roller 115 and the first trimming roller 120, , A plurality of notches 14 on the other side spaced apart at regular intervals on the other side in the width direction of the fabric 3, and a plurality of protruding to the other side in the width direction of the fabric 3 by the cut and removed scrap 15 on the other side. The tab 11 of is formed.

Meanwhile, when the secondary battery electrode fabric 3 passing between the first anvil roller 115 and the first trimming roller 120 passes between the second anvil roller 160 and the second trimming roller 180, the above One side end of the fabric 3 in the width direction is cut by a plurality of one side trimming blades 200, and the one side end edge 6 and one side trimming blade 200 in the fabric 3 Although limited, the portion except for the portion removed by the notch forming blade 140 on one side, that is, the second scrap 14 on one side of FIG. 6 is separated and removed from the fabric 3.

When the fabric 3, the plurality of one-side notch-forming blades 140 and the plurality of one-side trimming blades 200 are overlapped, the longitudinal extension 143 of the one-side notch-forming blade 140 and the The first blade sheet 135 and the second blade sheet 195 are aligned in the width direction of the fabric 3 so that the longitudinal extension 202 of the trimming blade 200 on one side partially overlaps in a straight line. . Accordingly, one end of the fabric 3 is parallel to the longitudinal direction of the fabric 3 and is trimmed to have a smooth edge when cut.

Since the metal sheets 136 and 196 of the first and second blade sheets 135 and 195 surrounding the outer circumferential surfaces of the first and second roller cores 121 and 181 are not hollow tubes, the fabric 3 ), the edge on one side and the edge on the other side do not connect in the length direction. Accordingly, a portion that cannot be cut by the plurality of protruding blades 140 and 146 of the first blade sheet 135 occurs in the fabric 3, and the plurality of protruding blades 200 of the second blade sheet 195 ), a part that cannot be cut occurs. The first blade sheet 135 and the second blade sheet 195 complement each other, so that the second blade sheet 195 cuts the portion not cut by the first blade sheet 135, and the second blade sheet 195 cuts the portion. The first blade sheet 135 is configured to cut a portion not cut by the sheet 195.

The secondary battery electrode fabric 3 passed between the second anvil roller 160 and the second trimming roller 180 and discharged from the secondary battery electrode trimming device 100 is a virtual electrode cutting line extending in its own width direction. It can be cut along (9) to form a unit electrode 10 constituting a unit cell of a secondary battery. The electrode cutting line 9 may be a straight line connecting the notch 13 on one side of the fabric 3 and the notch 14 on the other side corresponding thereto.

Meanwhile, the second trimming roller 180 of the secondary battery electrode trimming device 100 of the present invention replaces the second blade sheet 195 shown in FIG. 5 and is a second blade according to another embodiment shown in FIG. 7 A sheet 205 may be provided. 4, 6, and 7 together, the second blade sheet 205 is bent along the outer circumferential surface of the second roller core 181 (see FIG. 3) to form the second roller core 181. A metal sheet 206 having an inner surface attached to the outer circumferential surface, and a plurality of protruding blades 210 and 213 protruding from the outer surface of the metal sheet 206 to cut the fabric 3 of the secondary battery electrode. The metal sheet 206 has first alignment through holes 207 into which the first alignment protrusions 187 (see FIG. 3) of the second roller core 181 are inserted, and second alignment of the second roller core 181. A second alignment through hole 208 into which the protrusion 188 (see FIG. 3) is fitted is formed. Since the metal sheet 206 is the same as the metal sheet 196 of the second blade sheet 195 described with reference to FIGS. 3 and 5, overlapping descriptions will be omitted.

The second knife sheet 205 shown in FIG. 7 is a plurality of one side formed on one side of the fabric 3 in the width direction by the plurality of one side notched blades 140 of the first knife sheet 135 A plurality of one-side trimming blades 210 for cutting between notches 13 in the longitudinal direction of the fabric 3 and the fabric 3 for dividing the fabric 3 into unit electrodes constituting unit cells of a secondary battery. It includes a plurality of unit electrode dividing blades 213 for cutting (3) in the width direction of the fabric 3 at regular intervals.

Each one-side trimming blade 210 extends in the width direction of the fabric 3 and has a pair of width direction extensions 211 spaced apart from each other, and extends in the longitudinal direction of the fabric 3 and has both ends. A lengthwise extension part 212 bent and connected to an end of the pair of widthwise extension parts 211 in the inner direction of the original fabric 3 is provided. The one-side trimming blade 210 is the same as the one-side trimming blade 210 of the second blade sheet 195 described with reference to FIG.

Each unit electrode dividing blade 213 extends in the width direction of the original fabric 3, that is, parallel to the Y axis. One end of the unit electrode dividing blade 213 is connected to one widthwise extension 211 of the trimming blade 210 on one side, and the other end edge 7 of the other side of the fabric 3 ) extends across the

Referring to FIGS. 2, 6, and 7 together, the secondary battery electrode fabric 3 passing between the first anvil roller 115 and the first trimming roller 120 is connected to the second anvil roller 160. 2 When passing between the trimming rollers 180, one side end of the fabric 3 in the width direction is cut by a plurality of one-side trimming blades 200, so that one side end of the fabric 3 It is parallel to the longitudinal direction of (3) and trimmed so that the cut surface has smooth edges. In addition, the fabric 3 is cut along the electrode cutting line 9 by a plurality of unit electrode dividing blades 213 and separated into unit electrodes 10 . The first trimming roller 120 so that the electrode cutting line 9 connecting the notch 13 on one side of the fabric 3 and the notch 14 on the other side corresponding thereto and the unit electrode dividing blade 213 are aligned. ) and the distance between the second trimming roller 180 must be precisely adjusted.

Referring back to FIGS. 1 and 2 , the upstream frame 103 is movable relative to the downstream frame 101 in a direction parallel to the X-axis, through which the first trimming roller 120 and the second trimming roller The distance between (180) can be precisely adjusted. Specifically, the means for adjusting the distance between the first trimming roller 120 and the second trimming roller 180 includes a servo motor 105, an X-direction ball screw 106, A frame coupling member 107, an X-direction guide rail 108, and an X-direction guide rail receiver 109 are provided.

The servo motor 105 and the X-direction ball screw 106 are supported at the lower end of the downstream frame 101 supporting the upstream frame 103 . The X-direction ball screw 106 extends parallel to the X-axis and rotates clockwise and counterclockwise by the rotational power of the servo motor 105 . The frame coupling member 107 is fixedly coupled to the lower surface of the upstream frame 103, and as the X-direction ball screw 106 rotates, in the longitudinal direction of the X-direction ball screw 106, that is, X move parallel to the axis

The movement direction and the movement distance of the frame coupling member 107 vary according to the rotation direction and rotation angle of the X-direction ball screw 106 . The X-direction guide rail 108 extends parallel to the X axis and is fixed to one side of the downstream frame 101 facing the upstream frame 103 . The X-direction guide rail receiver 109 is slidably connected to the X-direction guide rail 108 in the longitudinal direction of the X-direction guide rail 108 and fixedly supported by the upstream frame 103 .

In this configuration, by precisely adjusting the distance between the first trimming roller 120 and the second trimming roller 180 by driving the servo motor 105, one side notch forming blade of the first blade sheet 135 140 (see FIG. 4) and the trimming blade 200 (see FIG. 5) on one side of the second blade sheet 195 sequentially cut the fabric 3 so that one end of the fabric 3 It can be trimmed smoothly without uncut places along a straight line in the longitudinal direction of the fabric (3). In addition, when the second blade sheet 205 of FIG. 7 is applied instead of the second blade sheet 195 of FIG. 5, one end of the fabric 3 forms a straight line in the longitudinal direction of the fabric 3. Along with being smoothly trimmed along, the fabric 3 has one side notch 13 (see FIG. 6) and the other side notch 14 ( 6) may be accurately cut along the electrode cutting line 9 connecting the electrodes to be divided into unit electrodes 10.

Meanwhile, FIGS. 1 and 2 disclose a configuration in which the distance between the first trimming roller 120 and the second trimming roller 180 is adjusted by moving the upstream frame 103 relative to the downstream frame 101. However, on the contrary, the downstream frame may be moved relative to the upstream frame to adjust the distance between the first trimming roller and the second trimming roller.

1 to 3 together, the secondary battery electrode trimming device 100 includes a means for supporting the first trimming roller 120 to be fine-adjustable up and down, and the second trimming roller 180 to be fine-adjusted up and down. Possibly supporting means is further provided. The means for supporting the first trimming roller 120 up and down in a fine-adjustable manner includes a pair of first servo motors 151, a pair of first lifting supports 153, and a pair of first Z-direction ball screws. (152), and a pair of first tactile displacement sensors (155).

The pair of first servo motors 151 and the pair of first Z-direction ball screws 152 are located on the upper side of one end 132 and the other end 133 of the first roller shaft 130, one by one. are placed The pair of first servo motors 151 are fixedly supported on an upper end of the upstream frame 103 . The pair of first Z-direction ball screws 152 extend in parallel with the Z-axis and rotate clockwise and counterclockwise by rotational power of the first servo motor 151 fastened to transmit power.

The pair of first elevating supports 153 rotatably support one end 132 and the other end 133 of the first roller shaft 130 . Each of the first lifting supports 153 moves in the longitudinal direction of the first Z-direction ball screw 152, that is, in parallel with the Z-axis, as the corresponding first Z-direction ball screw 152 rotates. The lifting direction and the lifting distance of the first lifting support 153 vary according to the rotation direction and rotation angle of the first Z-direction ball screw 152 . The pair of first contact-type displacement sensors 155 include a gap between one end 132 of the first roller shaft 130 and one end of the first anvil roller 115, and the first roller shaft ( A distance between the other end 133 of the first anvil roller 115 is measured.

If the distance measured by at least one of the pair of first tactile displacement sensors 155 during the trimming operation of the secondary battery electrode fabric 3 is out of the range of the preset reference distance, the secondary battery electrode trimming device 100 A controller (not shown) of ) drives the first servo motor 151 corresponding to the first contact-type displacement sensor 155 measured as out of the standard interval to move the first trimming roller 120 and the second The distance between the one-anvil rollers 115 can be precisely adjusted in the longitudinal direction of the rollers 120 and 115.

The means for supporting the second trimming roller 180 upwards and downwards finely is a pair of second servo motors 215, a pair of second lifting supports 217, and a pair of second Z-direction balls. A screw 216 and a pair of second tactile displacement sensors 219 are provided.

The pair of second servo motors 215 and the pair of second Z-direction ball screws 216 are one on the upper side of one end 192 and the other end 193 of the second roller shaft 190. are placed The pair of second servo motors 215 are fixedly supported on the upper end of the downstream frame 101 . The pair of second Z-direction ball screws 216 extend parallel to the Z-axis and rotate clockwise and counterclockwise by rotational power of a second servo motor 215 fastened to transmit power.

The pair of second elevating supports 217 rotatably supports one end 192 and the other end 193 of the second roller shaft 190 . Each of the second lifting supports 217 moves in the longitudinal direction of the second Z-direction ball screw 216, that is, in parallel with the Z-axis, as the corresponding second Z-direction ball screw 216 rotates. The lifting direction and the lifting distance of the second lifting support 217 vary depending on the rotation direction and rotation angle of the second Z-direction ball screw 216 . The pair of second contact-type displacement sensors 219 may include a gap between one end 192 of the second roller shaft 190 and one end of the second anvil roller 160, and the second roller shaft ( The distance between the other end 193 of 190 and the other end of the second anvil roller 160 is measured.

If the interval measured by at least one of the pair of second contact displacement sensors 219 during the trimming operation of the secondary battery electrode fabric 3 is out of the range of the preset reference interval, the secondary battery electrode trimming device 100 A controller (not shown) of ) drives the second servo motor 215 corresponding to the second contact-type displacement sensor 219 measured as out of the standard interval to move the second trimming roller 180 and The distance between the two anvil rollers 160 can be precisely adjusted in the longitudinal direction of the rollers 180 and 160 . In this way, by precisely adjusting the distance between the first trimming roller 120 and the first anvil roller 115 and the distance between the second trimming roller 180 and the second anvil roller 160, the secondary battery electrode The quality of the work of trimming the fabric 3 is improved.

The secondary battery electrode trimming device 100 blocks both ends 132 and 133 of the first roller shaft 130 so that the first trimming roller 120 does not escape from the upstream frame 103 and the upstream side A pair of first trimming roller fixing blocks 156 detachably fixed to the frame 103 and the second roller shaft 190 to prevent the second trimming roller 180 from being separated from the downstream frame 101. A pair of second trimming roller fixing blocks 220 which are detachably fixed to the downstream frame 101 while blocking both ends 192 and 193 are further provided.

When the first trimming roller fixing block 156 shown in the front side of FIG. 1 is separated from the upstream frame 103, the first roller shaft 130 of the first trimming roller 120 moves to a pair of first lifting supports 153. ) The first roller core 121 and the first blade sheet 135 attached thereto can be separated from the first roller shaft 130 while being supported on one of them and taken out of the upstream frame 103. . In the state where the first roller core 121 is taken out of the upstream frame 103, the operator easily replaces and attaches a new first blade sheet 135 or a first blade sheet having a different type of protruding blade, , The first roller core 121 may be coupled to the first roller shaft 130. Even a different type of first roller core having a diameter different from the diameter of the existing first roller core 121 and a first blade sheet suitable for this may be replaced and coupled to the first roller shaft 130. .

Similarly, when the second trimming roller fixing block 220 shown in the front of FIG. 1 is separated from the downstream frame 101, the second roller shaft 190 of the second trimming roller 180 moves up and down a pair of second roller shafts 190. In a state supported by one of the supports 217, the second roller core 181 and the second blade sheet 195 attached thereto are separated from the second roller shaft 190 and out of the downstream frame 101. can be pulled out In the state where the second roller core 181 is taken out of the downstream frame 101, the operator easily replaces and attaches a new second blade sheet 195 or a second blade sheet having a different type of protruding blade, , The second roller core 181 may be coupled to the second roller shaft 190 . Even a different type of second roller core having a diameter different from that of the existing second roller core 181 and a second blade sheet suitable for this may be coupled to the second roller shaft 190 by replacement.

The operator sets the first and second blade sheets 135, 195, and 205 having different specifications from the existing ones installed on the upstream frame 103 and the downstream frame 101, and the first and second blade sheets 135, 195, and 205 having different specifications from the existing ones. It is attached to the roller cores 121 and 181, and the first and second roller cores 121 and 181 having different specifications are replaced with the existing first and second roller cores 121 and 181, and the first and second roller cores 121 and 181 are used. By replacing and coupling to the roller shafts 130 and 190, the secondary battery electrode fabric 3 having a planar shape different from the existing one, or the unit electrode 10 having a different width (UW) from the existing one (see FIG. 6) can form In this case, the distance between the newly installed first and second trimming rollers 120 and 180 is precisely adjusted by driving the servo motor 151 for adjusting the distance between the first and second trimming rollers 120 and 180 described above. And, by driving the above-described first and second servo motors 151 and 215, the heights of the newly installed first and second trimming rollers 120 and 180 may be precisely adjusted.

The buffer tube 117 is a member in the form of a hollow tube formed of, for example, a polymer synthetic resin, that is, a plastics material. The buffer tube 117 surrounds the outer circumferential surface of the first anvil roller 115 formed of a metal material and is detachably coupled to the first anvil roller 115 . Since the protruding blades 140 and 146 (see FIG. 4) of the first blade sheet 135 are supported by the buffer tube 117 and cleanly cut through the fabric 3, the first anvil roller 115 does not collide with the outer circumference of the Thus, the buffer tube 117 improves the cutting force of the protruding blades 140 and 146, improves the lifespan, and protects the first anvil roller 115.

The buffer tube 117 is movable in a direction parallel to the Y-axis with respect to the first anvil roller 115 while surrounding the first anvil roller 115 . If the buffer tube 117 is partially torn due to repetitive trimming, rather than replacing the buffer tube 117 with a new one, the buffer tube 117 is moved in a direction parallel to the Y axis with respect to the first anvil roller 115. The unfrayed part of (117) is stamped on the protruding blades (140, 146).

Although not shown in FIG. 2 , the secondary battery electrode trimming device 100 of the present invention may further include a buffer tube surrounding the outer circumferential surface of the second anvil roller 160 . Since the buffer tube surrounding the outer circumferential surface of the second anvil roller 160 has the same configuration and performs the same function as the buffer tube 117 surrounding the outer circumferential surface of the first anvil roller 115, duplicate descriptions will be omitted.

Meanwhile, as shown in FIG. 2 , the secondary battery electrode trimming device 100 of the present invention may include a buffer belt 161 instead of a buffer tube surrounding the second anvil roller 160 . The buffer belt 161 circulates along a caterpillar path that adheres to the outer circumferential surface of the upper end of the second anvil roller 180 while supporting the fabric 3 of the secondary battery electrode. The buffer belt 161 may be formed of, for example, a synthetic resin such as polyethylene terephthalate (PET), polyvinyl chloride (PVC), polycarbonate (PC), polyimide (PI), or rubber. Since the protruding blade 200 of the second blade sheet 195 is supported by the buffer belt 161 and cuts the fabric 3, it does not collide with the outer circumferential surface of the second anvil roller 180. Thus, the buffer belt 161 improves the cutting force of the protruding blade 200, improves its lifespan, and protects the second anvil roller 160. In particular, when the fabric 3 of the secondary battery electrode passes between the second trimming roller 180 and the second anvil roller 160 and is cut into the unit electrode 10 (see FIG. 6) and discharged, the buffer tube A buffer belt 161 may be used instead.

The secondary battery electrode trimming device 100 includes a plurality of buffer belt guide rollers 162 to 168 defining the caterpillar path of the buffer belt 161 and tension for driving the buffer belt 161. The buffer belt presser 173 for pressing the buffer belt 161 to be formed, the second anvil roller 160, and some of the plurality of buffer belt guide rollers 164 to 168 are rotatably supported and the downstream frame ( A roller support 170 detachably fixed to 101, and a roller support fixing block 171 are further provided.

The plurality of buffer belt guide rollers are all idling rollers, and the first to third lower guide rollers 164, 165, and 166 disposed below the second anvil roller 160, and the second anvil roller 160 and the first and second intermediate guide rollers 162 and 163 disposed at a height between the first and third guide rollers 164, 165 and 166, and the second anvil roller 160 It has first and second upper guide rollers 167 and 168 disposed at one height.

When the fabric 3 of the secondary battery electrode is trimmed by passing through the first trimming roller 120 and the second trimming roller 180 having the second blade sheet 205 shown in FIG. 7, that is, the fabric When (3) is cut in the width direction of the fabric so that it is divided into unit electrodes 10 (see FIG. 6), the buffer belt 161 circularly runs along the endless track path shown in solid lines in FIG. 2, or It cycles along the endless track path shown by the dashed-dotted line in Fig. 2.

The caterpillar path shown by the solid line includes the second anvil roller 160, the first middle guide roller 162, the first lower guide roller 164, the second lower guide roller 165, and the third lower guide roller. 166, and the second intermediate guide roller 163 to the second anvil roller 160 again.

The first intermediate guide roller 162 is located downstream of the second anvil roller 180 along the moving direction of the fabric 3 . Accordingly, the unit electrode 10 passed between the second trimming roller 180 having the second blade sheet 205 and the second anvil roller 160 in FIG. 7 and divided and discharged (see FIG. 6) is supported by the buffer belt 161 in the section between the second anvil roller 160 and the first intermediate guide roller 162 and proceeds. In other words, the unit electrode 10 does not fall freely while passing through the second anvil belt 160 . Although not shown, the unit electrode 10 passing through the section between the second anvil roller 160 and the first intermediate guide roller 162 falls from the buffer belt 161 and is placed on a tray (not shown). can be loaded.

On the other hand, the caterpillar path shown by the dotted line is the second anvil roller 160, the first upper guide roller 167, the first middle guide roller 162, the first lower guide roller 164, the second It is a path toward the second anvil roller 160 via the lower guide roller 165, the third lower guide roller 166, the second middle guide roller 163, and the second upper guide roller 168.

The first upper guide roller 167 is located downstream of the second anvil roller 180 along the moving direction of the fabric 3 . Accordingly, the unit electrode 10 passed between the second trimming roller 180 having the second blade sheet 205 and the second anvil roller 160 in FIG. 7 and divided and discharged (see FIG. 6) is supported by the buffer belt 161 in the section between the second anvil roller 160 and the first upper guide roller 167 and proceeds. In other words, the unit electrode 10 does not fall freely while passing through the second anvil belt 160 . Although not shown, the unit electrode 10 passing through the section between the second anvil roller 160 and the first upper guide roller 167 falls from the buffer belt 161 and is placed on a tray (not shown). can be loaded.

The roller support 170 is detachably fixed to the front plate of the downstream frame 101 . The roller support fixing block 171 fixes the roller support 170 so as not to be separated from the downstream frame 101 when the roller support 170 is attached to the downstream frame 101 . The roller support 170 includes the roller shafts of the second anvil roller 160, the first and second upper guide rollers 167 and 168, and the first, second and third lower guide rollers 164, 165 and 166. One side end, specifically, the front plate side end of the downstream frame 101 is rotatably supported. When the roller support 170 is separated from the downstream frame 101, an opening is exposed in the front plate of the downstream frame 101. Through the opening, the buffer belt 161 is installed on the second anvil belt 160 and the plurality of buffer belt guide rollers 162 to 168, or, conversely, the buffer belt 161 installed for inspection is installed on the downstream frame 101. can be pulled out of the

The buffer belt presser 173 includes a buffer belt pressure roller 175, a pressure roller support 176, and an actuator 174. The buffer belt pressure roller 175 rotates the buffer belt 161 so that the running path of the buffer belt 161 becomes a zigzag path between the first lower guide roller 164 and the second lower guide roller 165. It is an idling roller that is movable in the pressing direction and in the opposite direction.

In the embodiment shown in FIG. 2 , the movement of the buffer belt pressure roller 175 in the direction of pressing the buffer belt 161 means that the buffer belt pressure roller 175 is in contact with the first lower guide roller 164. 2 rises from a position lower than the lower guide roller 165 to a position higher than the first lower guide roller 164 and the second lower guide roller 165, and the buffer belt pressure roller 175 moves in the opposite direction The movement is caused by the first lower guide roller 164 and the second lower guide roller (175) at a position higher than the first lower guide roller 164 and the second lower guide roller 165. 165) to descend to a lower position.

The actuator 174 provides power to move the buffer belt pressure roller 175 in the direction of pressing the buffer belt 161 and in the opposite direction. The actuator 174 may include, for example, a pneumatic cylinder, a hydraulic cylinder, or a linear motor. The pressure roller support 176 is fixedly supported by the actuator 174 and rotatably supports the buffer belt pressure roller 175 .

When the operator separates the roller support 170 from the downstream frame 101 and installs the buffer belt 161 to pass the second anvil belt 160 and the plurality of buffer belt guide rollers 162 to 168, To facilitate installation, since the buffer belt 161 is in a state of being stretched without contacting the first anvil roller 160 and the plurality of buffer belt guide rollers 162 to 168 with an appropriate tension, the buffer belt 161 is It is not possible to drive circularly along the infinite orbit path.

At this time, when the actuator 174 is operated in a direction in which the buffer belt pressure roller 175 rises and presses and adheres to the buffer belt 161, the gap between the first lower guide roller 164 and the second lower guide roller 165 is reduced. The buffer belt pressure roller 175 presses the buffer belt 161 so that the travel path of the buffer belt 161 becomes a zigzag path, so that the buffer belt is driven by the second anvil roller 160 and the plurality of buffer belt guide rollers 162. to 168) with an appropriate tension. Therefore, during the trimming operation of the secondary battery electrode trimming device 100, the buffer belt 161 circulates. On the other hand, if the operator wants to take the buffer belt 161 out of the downstream frame 101 to inspect it, the roller support 170 is separated from the downstream frame 101, and the buffer belt pressure roller 175 ) descends and operates the actuator 174 in a direction away from the buffer belt 161, the buffer belt 161 moves to the first anvil roller 160 and the plurality of buffer belt guide rollers 162 to 168. It does not come into contact with tension and becomes a stretched state. In this state, the operator can easily take the buffer belt 161 out of the downstream frame 101.

In the secondary battery electrode trimming device 100 described above, the plurality of trimming rollers 120 and 180 sequentially cut and trim the original fabric 3 of the secondary battery electrode that moves at a constant speed. Therefore, work productivity is improved and the noise of the work process is greatly reduced compared to trimming using a punching press, work productivity and cutting quality of the trimmed surface are improved, and work costs are reduced compared to trimming using a laser cutter. .

The secondary battery electrode trimming device 100 may precisely adjust the distance between the trimming rollers 120 and 180 spaced apart from each other along the traveling direction of the fabric 3 . Due to this, the portion of the fabric 3 cut by the trimming roller 120 disposed upstream along the moving direction of the fabric 3 and the portion of the fabric 3 cut by the trimming roller 180 disposed downstream can be tuned to be precisely offset.

Also, in the secondary battery electrode trimming device 100, the blade sheets 135, 195, and 205 may be detachably attached to the roller cores 121 and 181. Therefore, the fabric 3 of the secondary battery electrode may be trimmed so that it can be processed into unit electrodes of various shapes and widths by attaching different types of blade sheets to the roller core.

Meanwhile, the secondary battery electrode trimming device 100 described above with reference to the drawings includes a pair of trimming rollers 120 and 180 and a pair of anvil rollers 115 and 160 corresponding thereto, but this is exemplary, The secondary battery electrode trimming device of the present invention may include three or more trimming rollers and three or more anvil rollers corresponding thereto.

In addition, the trimming rollers 120 and 180 shown in FIG. 3 have roller shafts 130 and 190 and roller cores 121 and 181 detachably coupled to the roller shafts 130 and 190, but this As an example, the roller shaft and the roller core may have a configuration integrally coupled so as not to be separated.

In addition, the secondary battery electrode trimming device 100 includes one buffer tube 117 and one buffer belt 161, but this is an example and, for example, a buffer tube is applied to all anvil rollers or a buffer belt may be applied to all anvil rollers.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

3: secondary battery electrode fabric 100: secondary battery electrode trimming device
115, 180: anvil roller 120, 180: trimming roller
135, 195: blade sheet 140, 146, 200: protruding blade
161: buffer belt 173: buffer belt pressurizer

Claims (4)

As a device for trimming the fabric of a secondary battery electrode continuously supplied without interruption,
a plurality of anvil rollers, which are sequentially arranged to be spaced apart from each other along the moving direction of the fabric, as rollers supporting the fabric and rotating in a straight line in the traveling direction of the fabric;
a plurality of trimming rollers positioned on opposite sides of each anvil roller with the fabric interposed therebetween to rotate forward in the traveling direction of the fabric and partially cut the fabric;
a buffer belt that circulates along a caterpillar path in close contact with the outer circumferential surface of the anvil roller; and
A buffer belt guide roller located downstream of the anvil roller along the moving direction of the fabric;
Each of the plurality of trimming rollers includes a cylindrical roller core, a metal sheet bent along the outer circumferential surface of the roller core and having an inner surface attached to the outer circumferential surface of the roller core, and cutting the fabric. A blade sheet having at least one protruding blade protruding from the outer surface of the metal sheet to
The buffer belt is a secondary battery electrode trimming device to prevent damage to the anvil roller by the protruding blade of the blade sheet.
According to claim 1,
At least one protruding blade of the trimming roller has a unit electrode dividing blade for cutting the fabric in the width direction of the fabric at regular intervals in order to divide the fabric into unit electrodes constituting unit cells of a secondary battery. included,
The secondary battery electrode trimming device, characterized in that the unit electrodes passing between the trimming roller and the anvil roller and being divided and discharged are supported by the buffer belt in a section between the anvil roller and the buffer belt guide roller.
According to claim 1,
A secondary battery electrode trimming device further comprising a buffer tube surrounding an outer circumferential surface of at least one of the plurality of anvil rollers and detachably coupled to the at least one anvil roller.
According to claim 1,
A buffer belt pressurizer for pressing the buffer belt so that tension for running of the buffer belt is formed;
The buffer belt presser includes a buffer belt pressing roller movable in a direction for pressing the buffer belt and an opposite direction so that the travel path of the buffer belt becomes a zigzag path, and the buffer belt pressing roller, which is movable in the direction of pressing the buffer belt. Secondary battery electrode trimming device characterized in that it is provided with an actuator (actuator) for providing power to move in the direction of pressing and the opposite direction.

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