KR20220143191A - System for producing electrodes of battery - Google Patents

Abstract

The present invention relates to an electrode production system for secondary batteries for producing a secondary battery electrode, comprising a notching part for forming an electrode tab by notching an electrode. The notching part comprises: a frame; an upper mold part and a lower mold part disposed in the frame to be movable up and down; and a driving part disposed in the frame and connected to the upper mold part and the lower mold part. The driving part comprises: a first motor; a first shaft connected to the first motor; a first cam and a second cam disposed on the first shaft; a first connecting rod connecting the first cam and the upper mold part; and a second connecting rod connecting the second cam and the lower mold part. The upper mold part comprises: an upper mold; an upper plate disposed on the upper mold and movably coupled to the frame at an upper side of the first shaft in a vertical direction; and a lower plate connected to the upper plate and coupled to the frame to be vertically movable at a lower side of the first shaft. The lower mold part comprises: a first plate; and a lower mold disposed on the first plate. The eccentric direction of the first cam and the eccentric direction of the second cam are opposite to each other, and as the first shaft rotates, the moving direction of the upper mold part and the moving direction of the lower mold part become opposite to each other in the vertical direction, and thus it is possible to adjust the vertical separation distance between the upper mold and the lower mold.

Description

Electrode production system for secondary batteries {SYSTEM FOR PRODUCING ELECTRODES OF BATTERY}

The embodiment relates to an electrode production system for a secondary battery.

In general, a chemical battery includes a positive electrode, a negative electrode, and an electrolyte, and refers to a battery that generates electrical energy using a chemical reaction, which is a disposable primary battery and a secondary battery that can be charged and discharged repeatedly. can be divided into

On the other hand, due to the advantage of being able to charge and discharge, the use of secondary batteries is gradually increasing. Among such secondary batteries, since the lithium secondary battery has a high energy density per unit weight, it is widely used as a power source for electronic communication devices or a high-output hybrid vehicle.

In addition, an electrode used in such a secondary battery is used as a positive electrode and a negative electrode of the battery, and is used to electrically connect the battery and the outside of the battery.

Here, the electrode is produced through a process of notching and cutting the electrode in which the electrode tab is formed in the notched part at regular intervals. Notching can be made through the upper mold and the lower mold. The upper mold and the lower mold may move vertically to notch the electrode disposed between the upper mold and the lower mold.

The upper and lower molds move up and down through respective driving units. However, the notched part has a complicated structure because the driving part of the upper mold and the driving part of the lower mold are separately provided, and it is difficult to constantly control the movement of the upper mold and the movement of the lower mold.

Registered Patent Publication No. KR 10-1271492 (2013.05.30)

An object of the present invention is to solve the conventional problems as described above, and the present invention simplifies the configuration of the notched part and provides an electrode production system for a secondary battery that is easy to control the movement of the upper mold and the movement of the lower mold. have.

In an embodiment, a notching part for forming an electrode tab by notching an electrode. In the electrode production system for a secondary battery for producing an electrode for a secondary battery, which is disposed behind the notched part and includes a feeding part for introducing a notched electrode, the notched part is moved up and down to a frame and the frame an upper mold part and a lower mold part arranged to be possible, and a driving part disposed on the frame and connected to the upper mold part and the lower mold part, wherein the driving part is connected to a first motor and the first motor A first shaft, a first cam and a second cam disposed on the first shaft, a first connecting rod connecting the first cam and the upper mold part, and a second connecting rod connecting the second cam and the lower mold part a connecting rod, wherein the upper mold part includes an upper mold, an upper plate disposed on the upper mold and movably coupled to the frame from an upper side of the first shaft, and is connected to the upper plate and connected to the first and a lower plate movably coupled to the frame at a lower side of the shaft, wherein the lower mold part includes a first plate and a lower mold disposed on the first plate, the eccentric direction of the first cam and the The eccentric directions of the second cam are opposite to each other, and as the first shaft rotates, in the vertical direction, the moving direction of the upper mold part and the moving direction of the lower mold part are opposite to each other, so that the upper mold and the lower mold are opposite to each other. Adjusting the vertical separation distance of the feeding part, a belt part including an upper belt in contact with the upper surface of the electrode and a lower belt in contact with the lower surface of the electrode, a base connected to the belt part, and the base; and a first meander adjustment unit coupled to the first meander adjustment unit, wherein the first meander adjustment unit is coupled to the first rail and the base to be slidably coupled to the first rail along the width direction of the electrode perpendicular to the transfer direction of the electrode a first block and a first driving unit connected to the first block, wherein the first driving unit is connected to the measuring unit so that the first height measured by the measuring unit coincides with a reference value. position in the width direction It is possible to provide an electrode production system for a secondary battery that controls feedback.

It is disposed on the frame, by adjusting the vertical position of the upper mold, without changing the vertical stroke of the upper mold, further comprising a position adjusting unit for additionally adjusting the vertical separation distance between the upper mold and the lower mold .

The positioning unit includes a second motor disposed on the lower plate, and a second shaft connected to the second motor and including a third cam, and an end of the second connecting rod is coupled to the third cam. As the second shaft rotates, the vertical position of the second connecting rod is changed, and the vertical separation distance between the upper mold and the lower mold is further adjusted by moving the lower plate in the vertical direction.

The lower plate includes a first groove formed concave on the upper surface and a first hole formed to communicate from the side to the first groove, the end of the second connecting rod is located in the first groove, The second shaft passes through the first hole and is rotatably coupled to an end of the second connecting rod disposed in the first groove.

The axial direction of the first shaft is parallel to the transfer direction of the electrode.

The axial direction of the second shaft is parallel to the transfer direction of the electrode.

The first shaft includes a 1-1 shaft and a 1-2 shaft that are spaced apart from each other, and the first connecting rod includes a 1-1 connecting rod connected to the 1-1 shaft; a 1-2-th connecting rod connected to the 1-2-th shaft, wherein the second connecting rod is connected to the 2-1-th connecting rod connected to the 1-1 shaft and the 1-2-th shaft It includes a 2-2 connecting rod.

The second shaft includes a 2-1 shaft and a 2-2 shaft that are spaced apart from each other, the 2-1 shaft is connected to the 2-1 connecting rod, and the 2-2 shaft is the second shaft It is connected with 2-2 connecting rod.

a first gear connected to the first motor; a second gear connected to the 1-1 shaft and meshed with the first gear; and a third gear connected to the 1-2 shaft; The first gear includes a 1-1 gear and a 1-2 gear that are coaxially coupled, and the 1-1 gear is shifted by a predetermined angle to the 1-2 gear based on a rotation direction.

An inspection unit disposed at the rear of the notched part to determine whether the notched electrode is defective; a punching part and an air supply part connected to the punching part, wherein the air supply part supplies air to the punching part through a first line to lower the punching part, and the air discharged from the first line to a branching line Through the, the scrap of the electrode punched by the punching unit is pushed out.

A vertical stroke of the upper mold part and a vertical stroke of the lower mold part are different from each other.

The upper mold part is disposed on the upper plate and includes a plurality of first sensors for sensing a vertical position of the upper mold, and the lower mold part is disposed on the first plate to determine the vertical position of the lower mold. It includes a plurality of second sensors for sensing.

A third sensor disposed between the unwinding part and the notched part to control the tension of the electrode, and a third sensor disposed between the capacitor unit and the notched part to detect the boundary line between the coated and uncoated parts of the electrode, and , a second meander adjustment unit disposed between the unwinding unit and the density unit, wherein the second meander adjustment unit moves the electrode so that the boundary line between the coated and uncoated portions of the electrode detected by the third sensor is located at the reference line. direction can be adjusted.

A third sensor disposed between the unwinding part and the notched part to control the tension of the electrode, and a third sensor disposed between the capacitor unit and the notched part to detect the boundary line between the coated and uncoated parts of the electrode, and , a second meandering adjustment unit disposed between the notch unit and the notch, wherein the second meandering adjustment unit runs in the direction of movement of the electrode so that the boundary line between the coated and uncoated portions of the electrode detected by the third sensor is located at the reference line. can be adjusted.

The embodiment is configured to move the upper mold and the lower mold together through a single shaft, so the configuration is simple, and it is easy to control the movement of the upper mold and the lower mold.

The embodiment has the advantage of being able to finely adjust the notch depth for the electrode according to the characteristics of the electrode by adjusting the position of the upper mold through the position adjusting unit.

The embodiment has an advantage of blowing off scrap of the electrode through a branch line branching from the first line to which air for moving the punching unit is supplied when punching and marking the defective electrode.

1 is a front view showing an electrode production system for a secondary battery according to an embodiment;
Figure 2 is a perspective view showing the notch shown in Figure 1,
3 is a plan view of the notched portion shown in FIG. 2;
4 is a view showing a driving unit disposed between the first plate of the lower mold part and the lower plate of the upper mold part;
5 is a perspective view showing a first shaft, a first cam, and a second cam;
6 is a partial cross-sectional view of the lower plate;
7 is a front view of the notched part showing the positions of the upper mold and the lower mold before notching;
8 is a front view of the notching part showing the positions of the upper mold and the lower mold in the notching process;
9 is a bottom view of the notched part shown in FIG. 1;
10 is a view showing a second shaft of the positioning unit;
11 is a view showing a second connecting rod and a second shaft;
12 is a partial cross-sectional view of the notched part including the positioning part;
13 is a cross-sectional view showing the state of the second connecting rod and the second shaft before the positioning unit operates;
14 is a cross-sectional view showing the state of the second connecting rod and the second shaft after the positioning unit operates;
15 is a view showing the first gear, the second gear, and the third gear of the driving unit;
16 is a view showing the teeth of the first gear shown in FIG. 15;
17 is a view showing a marking unit.
18 is a view showing an upper mold part including a first sensor;
19 is a view illustrating a lower mold part including a second sensor.
20 is a plan view showing an electrode;
21 is a view showing the amount of camber of the electrode;
22 is a diagram illustrating an electrode having a relatively smaller camber amount than the electrode illustrated in FIG. 21 , and FIG. 23 is a diagram illustrating an electrode having a relatively larger camber amount than the electrode illustrated in FIG. 22 .
24 is a view showing an electrode on which electrode tabs are formed;
25 is a block diagram showing a feeding unit including a first meander adjustment unit;
26 is a side view of the feeding part;
27 is a view showing a feeding part moving in the width direction of the electrode;
28 is a view showing the first height of the coating portion in the electrode tab;
29 is a view showing the configuration of the base moving in the transfer direction of the electrode.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art, and the following embodiments can be modified in various other forms, and the scope of the present invention is not limited. It is not limited to the following examples. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the spirit of the invention to those skilled in the art.

The terminology used herein is used to describe specific embodiments, not to limit the present invention.

As used herein, the singular form may include the plural form unless the context clearly dictates otherwise. Also, as used herein, “comprise” and/or “comprising” refers to the presence of the recited shapes, numbers, steps, actions, members, elements, and/or groups thereof. and does not exclude the presence or addition of one or more other shapes, numbers, movements, members, elements and/or groups. As used herein, the term “and/or” includes any one and any combination of one or more of those listed items.

Although the terms first, second, etc. are used herein to describe various members, regions and/or regions, it is to be understood that these elements, parts, regions, layers, and/or regions should not be limited by these terms. do. These terms do not imply a specific order, upper or lower, superiority or superiority, and are used only to distinguish one member, region or region from another member, region or region. Accordingly, a first member, region, or region described below may refer to a second member, region, or region without departing from the teachings of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically illustrating embodiments of the present invention. In the drawings, variations of the illustrated shapes may be expected, for example depending on manufacturing technology and/or tolerances. Accordingly, embodiments of the present invention should not be construed as limited to the specific shape of the region shown herein, but should include, for example, changes in shape caused by manufacturing.

The electrode production system for secondary batteries according to the present invention is a device for automatically and continuously producing electrodes used in secondary batteries.

1 is a front view showing an electrode production system for a secondary battery according to an embodiment. below. The x-axis direction of the figure is the transport direction of the electrode, the y-axis direction of the figure shows the front-back direction of the electrode production system for secondary batteries, and the width direction of the electrodes is shown, and the z-axis direction of the figure is electrode production for secondary batteries It is the height direction of the system, and indicates the vertical direction of the notched part. Hereinafter, in describing the embodiment, 'front' and 'rear' are based on the transfer direction of the electrode, and 'upper side' and 'bottom side' are based on the vertical direction.

As shown in Figure 1, the electrode production system for a secondary battery according to the embodiment is an unwinding part 100, a notching part 200, a feeding part 300, an inspection part 400, and a marking part ( 500 ) and a rewinding unit 600 .

The unwinding unit 100 continuously supplies an electrode formed of a band-shaped metal plate. An electrode formed of a strip-shaped metal plate extending horizontally from the unwinding part 100 of the inlet side is supplied to the notching part 200 .

The notched part 200 is disposed behind the unwinding part 100 to form an electrode tab on the electrode.

The feeding unit 300 is disposed at the rear of the notched unit 200 , and serves to guide the notched electrode to the inspection unit 400 .

The inspection unit 400 is disposed at the rear of the feeding unit 300 and inspects whether the notched electrode is defective through a camera or the like.

The marking unit 500 is disposed at the rear of the inspection unit 400 , and performs marking on the electrode determined to be defective by the inspection unit 400 .

The rewinding unit 600 is disposed behind the marking unit 500 and serves to wind the electrode on a roll. Such a secondary battery electrode production system may be a roll-to-roll type secondary battery electrode production system in which the electrode unwound in the unwinding unit 100 is monitored again by the rewinding unit 600 . .

Meanwhile, between the unwinding part 100 and the notching part 200 , the second meandering adjustment part 700 and the capacitor unit D for adjusting the tension to the electrode may be disposed.

FIG. 2 is a perspective view illustrating the notched part 200 shown in FIG. 1 , and FIG. 3 is a plan view of the notched part 200 shown in FIG. 2 .

2 and 3 , the notch 200 is configured to move the upper mold 221 and the lower mold 231 together through one first shaft 242 , so that the configuration is simple and the upper mold There is a feature that it is easy to control the movement of the 221 and the movement of the lower mold 231 .

The specific configuration of the notched part 200 is as follows.

The notched part 200 may include a frame 210 , an upper mold 221 part, a lower mold 231 part, and a driving part.

The frame 210 serves to slidably support the upper mold 221 and the lower mold 231 in the vertical direction. Each of the pillars C may be disposed near the edge of the frame 210 .

The upper mold part 220 may include an upper mold 221 , an upper plate 222 , and a lower plate 223 . The upper mold 221 may be disposed on the lower surface of the upper plate 222 . In the vertical direction (z), the upper mold 221 is disposed to face the lower mold 231 . The upper plate 222 may be fixed to the column C of the frame 210 . The lower plate 223 may be disposed below the first shaft 242 of the driving unit 240 . The lower plate 223 may be fixed to the upper plate 222 and slidably disposed on the column C of the frame 210 in the vertical direction (z).

When the lower plate 223 moves in the vertical direction (z), the upper plate 222 and the upper mold 221 move together in the vertical direction (z) in conjunction therewith. Accordingly, the vertical (z) displacement of the lower plate 223 determines the vertical (z) stroke of the upper mold 221 .

The lower mold part 230 may include a lower mold 231 and a first plate 232 . The lower mold 231 is disposed above the first plate 232 . The first plate 232 may be slidably disposed on the pillar C of the frame 210 in the vertical direction (z). Accordingly, the vertical (z) displacement of the first plate 232 determines the vertical (z) stroke of the lower mold 231 .

In the vertical direction z, a roller R is disposed between the upper mold 221 and the lower mold 231 to support the electrode S to pass between the upper mold 221 and the lower mold 231 . .

The driving unit 240 moves the upper mold 221 and the lower mold 231 together in the vertical direction (z). The driving unit 240 may be disposed below the upper mold 221 and the lower mold 231 . The driving unit 240 includes a first motor 241 , a first shaft 242 , a first cam 243 , a second cam 244 , a first connecting rod 245 , and a second connecting rod (246).

The first motor 241 may be arranged such that the axial direction of the rotation shaft is the transfer direction (x) of the electrode (S).

The first shaft 242 is connected to the first motor 241 , and the axial direction of the first shaft 242 may be disposed to be the transport direction (x) of the electrode (S).

The first cam 243 is disposed on the first shaft 242 . The first cam 243 may be disposed at one end and the other end of the first shaft 242 based on the transfer direction x of the electrode S, respectively.

The second cam 244 is disposed on the first shaft 242 . The second cam 244 may be disposed at one end and the other end of the first shaft 242 based on the transfer direction x of the electrode S, respectively.

The first connecting rod 245 is coupled to the first cam 243 and is connected to the first plate 232 of the lower mold part 230 . The first connecting rod 245 may be disposed at one end and the other end of the first shaft 242 based on the transport direction x of the electrode S, respectively.

The second connecting rod 246 is coupled to the second cam 244 and is connected to the second plate of the upper mold part 220 . The second connecting rod 246 may be respectively disposed at one end and the other end of the first shaft 242 based on the transport direction x of the electrode S.

FIG. 4 is a view showing the driving unit 240 disposed between the first plate 232 of the lower mold part 230 and the lower plate of the upper mold part 220 .

Referring to FIG. 4 , the first shaft 242 of the driving part 240 is the first plate 232 of the lower mold part 230 and the lower plate of the upper mold part 220 in the vertical direction (z). 223 may be disposed between.

The upper end of the first connecting rod 245 is connected to the first plate 232 of the lower mold part 230 .

The lower end of the second connecting rod 246 is connected to the lower plate 223 of the upper mold part 220,

The first shaft 242 may be arranged in a double row. For example, the first shaft 242 may include a 1-1 shaft 242a and a 1-2 th shaft 242b. The 1-1 shaft 242a and the 1-2 th shaft 242b are disposed to be spaced apart from each other based on the width direction y of the electrode S.

The first connecting rod 245 may include a 1-1 connecting rod 245a and a 1-2 connecting rod 245b. The 1-1 connecting rod 245a is connected to the 1-1 shaft 242a. And the 1-2 connecting rod (245b) is connected to the 1-2-th shaft (242b).

The second connecting rod 246 may include a 2-1 connecting rod 246a and a 2-2 connecting rod 246b. The 2-1 th connecting rod 246a is connected to the 1-2 th shaft 242a. And the 2-2 connecting rod 246b is connected to the 1-2 shaft 242b.

The first connecting rod 245 forms a connection point corresponding to a corner of a square with respect to the first plate 232 . And the second connecting rod 246 also forms a connection point corresponding to the corner of the rectangle with respect to the lower plate (223).

5 is a perspective view illustrating a first shaft 242 , a first cam 243 , and a second cam 244 .

4 and 5 , the first cam 243 and the second cam 244 include the first cam 243 so that the eccentric direction of the first cam 243 and the eccentric direction of the second cam 244 are opposite to each other. It may be disposed on the shaft 242 . When the first shaft 242 rotates, the first cam 243 and the second cam 244 also rotate together, and the first connecting rod 245 connected to the first cam 243 and the second cam 244, respectively. ) and the second connecting rod 246 also move in the vertical direction (z). At this time, since the eccentric direction of the first cam 243 and the eccentric direction of the second cam 244 are opposite to each other, the first connecting rod 245 and the second connecting rod 246 in the vertical direction z move in the opposite direction

6 is a partial cross-sectional view of the lower plate 223 .

5 and 6 , the lower plate 223 may include a first groove G1 and a first hole H1. The first groove G1 is concavely formed on the upper surface of the lower plate 223 . The first groove G1 is where the lower end of the second connecting rod 246 is inserted. The first hole H1 is disposed to face the first groove G1 from the side surface of the lower plate 223 and is connected to the first groove G1. This first hole H1 is a place through which the second shaft of the positioning unit 250 passes. The second shaft passing through the first hole H1 is connected to the lower end of the second connecting rod 246 .

7 is a front view of the notched part 200 showing the positions of the upper mold 221 and the lower mold 231 before notching, and FIG. 8 is the position of the upper mold 221 and the lower mold 231 during the notching process. It is a front view of the notched part 200 shown.

Referring to FIG. 7 , the upper mold 221 and the lower mold 231 before notching are disposed to be spaced apart from each other in the vertical direction (z). In a state in which the electrode S is supplied between the upper mold 221 and the lower mold 231, as shown in FIG. 8 of the driving unit 240, when the first shaft 242 rotates, the first cam ( 243 , the first connecting rod 245 moves upward, and at the same time, the second connecting rod 246 moves downward by the second cam 244 .

As the first connecting rod 245 moves upward, the first plate 232 of the lower mold part 230 is pushed upward to move the lower mold 231 upward with a constant stroke. Then, while the second connecting rod 246 moves downward, the lower plate 223 of the upper mold part 220 is pushed downward. As the lower plate 223 is pushed downward, the upper plate 222 moves downward in association with this, and thereby the upper mold 221 moves downward with a constant stroke. And while the upper mold 221 and the lower mold 231 are in contact with each other, notching proceeds in the electrode S.

In this case, the vertical direction (z) stroke of the upper mold 221 and the vertical direction (z) stroke of the lower mold 231 may be different.

By rotating one first shaft 242 in this way, the configuration is simple because the upper mold 221 and the lower mold 231 can be driven together, and the movement of the upper mold 221 and the lower mold 231 is reduced. It has the advantage of being easy to control.

On the other hand, depending on the characteristics of the material of the electrode (S), the notch depth of the upper mold 221 with respect to the electrode (S) may vary slightly. For example, when the electrode tab is formed to be relatively long, the notch depth of the upper mold 221 needs to be set slightly larger in consideration of the deflection of the electrode S because the electrode tab may be sagged. Conversely, if the notch depth of the upper mold 221 is set to be large, the overlap section between the upper mold 221 and the lower mold 231 increases, and the wear of the upper mold 221 and the lower mold 231 increases and the risk of damage is increased. This growing problem arises.

Therefore, it is necessary to finely adjust the notch depth of the upper mold 221 according to the characteristics of the electrode S while maintaining the stroke constant in the vertical direction z of the upper mold 221 and the lower mold 231 . there is

9 is a bottom view of the notch 200 shown in FIG. 1 , FIG. 10 is a view showing the second shaft of the positioning unit 250 , and FIG. 11 is a second connecting rod 246 and a second It is a view showing a shaft, and FIG. 12 is a partial cross-sectional view of the notched part 200 including the positioning part 250 .

6 and 9 to 12 , the notch depth of the upper mold 221 may be finely adjusted through the positioning unit 250 . The positioning unit 250 may be disposed on the lower plate 223 of the upper mold unit 220 .

The positioning unit 250 may include a second motor 251 and a second shaft 252 . The second motor 251 provides a rotational force to the second shaft 252 . The second motor 251 may be fixed to the lower plate 223 of the upper mold part 220 . The rotation axis of the second motor 251 may be arranged to be parallel to the transfer direction (x) of the electrode (S). The second shaft 252 is connected to the second motor 251 . The axial direction of the second shaft 252 may be arranged to be parallel to the transport direction (x) of the electrode (S).

The second shaft 252 may be rotatably coupled to the lower plate 223 of the upper mold part 220 . The second shaft 252 may include a first region 252b and a third cam 252a. The first region 252b is disposed in the first hole H1 of the lower plate 223 . The third cam 252a is rotatably inserted into the second hole 246a disposed at the lower end of the second connecting rod 246 . The third cam 252a is eccentrically disposed on the axial center of the second shaft 252 , and induces the lower plate 223 to additionally move in the vertical direction (z).

13 is a cross-sectional view illustrating the state of the second connecting rod 246 and the second shaft 252 before the positioning unit 250 operates, and FIG. 14 is after the positioning unit 250 operates, It is a cross-sectional view showing the state of the second connecting rod 246 and the second shaft 252 .

13 and 14, the second connecting rod 246 and the lower plate 223 are connected through the second shaft 252, and when the second connecting rod 246 moves downward, the lower plate ( 223) moves downward in conjunction with this.

When the positioning unit 250 operates, the third cam 252a pushes the second connecting rod 246 upward as shown in P3 of FIG. 14 while the second shaft 252 rotates. However, since the first shaft 242 is fixed to the frame 210 in the vertical direction (z), a reaction force, such as P4 of FIG. 14 , acts on the second connecting rod 246 .

Since the lower plate 223 is movably disposed on the frame 210 in the vertical direction (z), by this reaction force, as shown in P5 of FIG. 14 , the lower plate 223 is pushed downward and moved, so that the upper The positions of the plate 222 and the upper mold 221 in the vertical direction (z) are changed. When the vertical direction (z) position of the upper mold 221 is changed by the positioning unit 250 while the vertical direction (z) stroke of the upper mold 221 is constantly maintained, the upper mold 221 is notched You can adjust the depth.

Since the notch depth of the upper mold 221 corresponds to the vertical length ST at which the third cam 252a pushes the second connecting rod 246, by adjusting the rotation angle of the second shaft 252, It has the advantage of being able to fine-tune it.

15 is a view illustrating a first gear, a second gear, and a third gear of the driving unit 240 .

4 and 15 , the driving unit 240 may include a first gear 224 , a second gear 225 , and a third gear 226 . Using the first gear 224 , the second gear 225 , and the third gear 226 , the 1-1 shaft 242a and the 1-2th shaft 242b through one first motor 241 . ) can be rotated together.

The first gear 224 is connected to the shaft of the first motor 241 . The first gear 224 may be directly connected to the shaft of the first motor 241 or may be disposed to mesh with the pinion gear G connected to the shaft of the first motor 241 . The second gear 225 is disposed on the 1-1 shaft 242a. The second gear 225 may be disposed to mesh with the pinion gear G connected to the shaft of the first motor 241 . The third gear 226 is disposed on the 1-2th shaft 242b. The third gear 226 may be disposed to directly mesh with the first gear 224 .

FIG. 16 is a view showing the teeth of the first gear 224 shown in FIG. 15 .

15 and 16 , the first gear 224 may include a first-first gear 224a and a first-second gear 224b that are coaxially coupled. The 1-1 gear 224a may be shifted by a predetermined angle to the 1-2 gear 224b based on the rotation direction. Accordingly, when viewed from the axial direction, the teeth of the 1-1 gear 224a are slightly shifted in the rotational direction than the teeth of the 1-2 gear 224b and are connected to the shaft of the first motor 241 . There is an advantage that can reduce backlash in the process of meshing with the pinion gear (G) or the second gear (225).

In this way, if the backlash is reduced, the error in rotating the 1-1 shaft 242a and the 1-2 shaft 242b at the same time can be greatly reduced, so the notching quality is improved by maintaining the balance of the upper mold 221 . There are advantages that can be

17 is a view illustrating the marking unit 500 .

Referring to FIG. 17 , the marking unit 500 is disposed at the rear of the inspection unit 400 to punch and mark the electrode S determined to be defective.

The marking unit 500 may include a punching unit 510 and an air supply unit 520 connected to the punching unit 510 . The air supply unit 520 supplies air through the first line L1 to move the punching unit 510 downward by pneumatic pressure. The punching part 510 makes contact with the electrode S and perforates a partial region of the electrode S, thereby marking a defective electrode. In the marking unit 500 , a branch line L2 branched from the first line L1 may extend to the punching unit 510 . Through the branch line (L2), the discharged air serves to blow the scrap (Sa) generated by punching to facilitate the suction of the scrap (Sa).

As such, by utilizing a part of the air for driving the punching unit 510 without implementing air for blowing the scrap Sa through a separate configuration, the configuration of the marking unit 500 is simplified, and the scrap (Sa) ) has the advantage that it can be easily removed.

18 is a view showing the upper mold part 220 including the first sensor.

Referring to FIG. 18 , the upper mold part 220 may include a plurality of first sensors S1 . The first sensor S1 senses a position in the vertical direction (z) of the upper mold part 220 , and serves to check whether the upper mold part 220 is balanced. The first sensor S1 may be disposed on the lower surface of the upper plate 222 of the upper mold part 220 . In addition, the first sensor S1 may be disposed in the vicinity of four corners of the upper mold 221 , respectively. By analyzing the vertical direction (z) positions of the upper mold 221 sensed by the first sensor S1 disposed in four places, it can be confirmed whether the upper mold part 220 is balanced.

19 is a view showing the lower mold part 230 including the second sensor.

Referring to FIG. 19 , the lower mold part 230 may include a plurality of second sensors S2 . The second sensor S2 senses a position in the vertical direction (z) of the lower mold part 230 , and serves to check whether the lower mold part 230 is balanced. The second sensor S2 may be disposed on the upper surface of the first plate 232 of the lower mold part 230 . In addition, the second sensor S2 may be disposed in the vicinity of four corners of the lower mold 231 , respectively. By analyzing the vertical direction (z) positions of the lower mold 231 sensed by the second sensors S2 disposed in four places, it can be confirmed whether the lower mold part 230 is balanced.

Meanwhile, between the unwinding part 100 and the notching part 200 , the second meandering adjustment part 700 and the denser unit D for adjusting the tension in response to a change in the supply speed of the electrode may be disposed. The second meander adjustment unit 700 may be disposed between the unwinding unit 100 and the density unit D. Alternatively, the second meander adjustment unit 700 may be disposed between the density unit D and the notch unit 200 .

20 is a plan view showing the electrode S.

Referring to FIG. 20 , the electrode S may be divided into a coated portion Sa and an uncoated portion Sb. The coated part (Sa) is a part where the active material layer is located, the uncoated part (Sb) is a part without an active material layer, and a part of the coated part (Sa) and the uncoated part (Sb) are used as an electrode tab (Sc). can be

The measuring part K2 may be disposed directly in front of the notched part 200 . The measurement unit K2 detects the boundary Q between the coated portion Sa and the uncoated portion Sb. The second meander adjustment unit 700 determines that the electrode S is meandering when it is confirmed that the boundary Q is deviating from the reference line through the measurement unit K2, so that the boundary Q is aligned with the reference line. S) to adjust the running direction.

Meanwhile, the measuring unit K1 is positioned immediately behind the notched unit 200 to sense the first height W of the coating unit Sa from the electrode tab Sc. The measurement part K1 is measured by the difference in the capbur amount of the electrode S. This is to determine if there is an error in notching.

21 is a diagram illustrating the camber amount of the electrode S, FIG. 22 is a diagram illustrating an electrode S having a relatively smaller camber amount than the electrode S illustrated in FIG. 21 , and FIG. 23 is FIG. It is a diagram showing the electrode S having a relatively larger camber amount than the illustrated electrode S.

Various electrodes S with different camber amounts may be supplied. For example, while the camber amount CB' of the electrode S shown in FIG. 22 is relatively smaller than the camber amount CB of the electrode S shown in FIG. 21, the electrode S shown in FIG. 23 ) may be relatively larger than the camber amount CB of the electrode S shown in FIG. 22 . Here, the amount of camber indicates the degree of curvature of the electrode S, and is expressed as a difference value between the position of the uncoated portion Sb at the tip of the electrode S and the normal position of the uncoated portion Sb without the curve. can This amount of camber may be expressed based on the width direction y of the electrode S.

When the amount of camber is different for each electrode S in this way, since the boundary (Q in FIG. 20 ) between the coated part Sa and the uncoated part Sb is different for each electrode S, in the measuring part K2, the electrode S Even if the forward running of the electrode is confirmed, a defect may occur in the electrode tab Sc during the notching process.

The measuring part (K2) is disposed at the boundary (Q) of the coated part (Sa) and the uncoated part (Sb) and considering the entire length of the electrode (S) arranged long along the transport direction (x), the third sensor Since the point where K2 is located is only one point, even if the boundary Q between the coated part Sa and the uncoated part Sb in the third sensor K2 is in the correct position, in the notching process, the electrode (S) may be meandering.

The measuring unit K2 is disposed immediately behind the notching unit 30 in order to solve this problem, and provides control information to the first meandering adjustment unit 330 of the feeding unit 300 in response to the electrode S having a different camber amount. to provide.

24 is a diagram illustrating an electrode S on which an electrode tab Sc is formed.

Referring to FIG. 24 , the measuring unit K2 may acquire an image of the electrode S coming out of the notched unit 30 . The measurement unit K1 measures the first height W of the coating portion Sa in the electrode tab Sc based on the width direction y of the electrode S in the acquired image. During notching, the electrode tab Sc is notched so that a portion of the coated portion Sa together with the uncoated portion Sb is formed by the first height W. As shown in FIG. Due to the difference in the camber amount of the electrode S, if the first height W is different from the reference value, a defect may occur in the electrode tab Sc. The measurement unit K1 may include a vision camera or a sensor.

25 is a block diagram illustrating the feeding unit 300 including the first meandering adjustment unit 330 , FIG. 26 is a side view of the feeding unit 300 , and FIG. 27 is the width direction (y) of the electrode (S). It is a view showing the feeding unit 300 that moves.

25 to 27 , the first meander adjustment unit 330 may be disposed in the feeding unit 300 . The feeding unit 300 continuously supplies the electrode S to the inspection unit 400 by continuously moving the electrode S passing through the notch 200 in a traction method that continuously draws it. The feeding unit 300 may pull the electrode S at different speeds or tensions that are repeated periodically.

This feeding part 300 is disposed at the rear of the notched part 200, and continuously pulls the electrode S, so that it is very easy to adjust the traveling direction of the electrode S. In particular, since the measuring unit K1 and the feeding unit 300 are very close to each other in the transport direction (x) of the electrode S, the meandering of the electrode S is changed to a forward run even if the position of the electrode S is changed small. It has the advantage of being able to change quickly.

The feeding unit 300 may include a belt unit 310 , a base 320 , and a first meander adjustment unit 330 .

The belt unit 310 may include an upper belt 311 and a lower belt 312 .

The upper belt 311 is in contact with the upper surface of the electrode S. The upper belt 311 includes a front roller F1 disposed at the vertex of the triangle, a rear roller R1, and a driving roller C1 connected to the motor. ) and can be driven. The front roller F1 may be disposed in front of the driving roller C1, and the rear roller R1 may be disposed in the rear of the driving roller C1.

The lower belt 312 is in contact with the upper surface of the electrode S. The lower belt 312 is a front roller F2 disposed at the apex of an inverted triangle, respectively, and a driving roller connected to the rear roller R2 and the motor. It can be mounted on (C2) and driven. The front roller F2 may be disposed in front of the driving roller C2 , and the rear roller R2 may be disposed in the rear of the driving roller C2 .

The base 320 supports the belt part 310 .

The first meander adjustment unit 330 may be disposed below the base 320 . The first meander adjustment unit 330 moves the base 320 in the width direction (y) of the electrode (S), and changes the position of the belt unit 310 in the width direction (y) to the feeding unit 300 . It serves to control the traction direction of the electrode (S).

The first meander adjustment unit 330 may include a first rail 331 , a first block 332 , and a first driving unit 333 . The first block 332 may be slidably coupled to the first rail 331 . The first rail 331 is disposed along the width direction y of the electrode S. In addition, the first block 332 is connected to the first driving unit 333 and the base 320 . The first driving unit 333 may be formed by combining a driving source such as a motor and a power transmission member such as a screw connected to the motor. When the first driving unit 333 operates, when the first block 332 moves along the first rail 331 , the position in the width direction (y) of the belt unit 310 is changed, and the electrode S is pulled direction is changed

On the other hand, the first rail 331 may include a 1-1 rail 331a relatively disposed at the front and a 1-2 rail 331b disposed at a relatively rear side. And the first block 332 includes a 1-1 block 322a coupled to the 1-1 rail 331a and a 1-2 block 322b coupled to the 1-2 rail 331b. can

28 is a view showing the first height W of the coating portion Sa in the electrode tab Sc.

26 to 28 , the first meander adjustment unit 330 receives the first height W measured by the measurement unit K1. If the received first height (W) is different from the reference value (W'), the difference value (W1) is compensated and feedback control is performed until the first height (W) matches the reference value (W') to control the belt part ( 310) in the width direction (y) to change the position.

29 is a view showing the configuration of the base 320 moving in the transfer direction of the electrode (S).

Referring to FIG. 29 , the base 320 may include a plate 321 , a second rail 322 , a second block 323 , and a second driving unit 324 . The plate 321 is connected to the belt part 310 to support the belt part 310 . The second block 323 is slidably coupled to the second rail 322 . The second rail 322 may be disposed along the transport direction of the electrode (S). In addition, the second block 323 is connected to the second driving unit 324 and the plate 321 . The second driving unit 324 may be formed by combining a driving source such as a motor and a power transmission member such as a screw connected to the motor. When the second driving unit 324 operates, when the second block 323 moves along the second rail 322 , the position of the belt unit 310 in the transport direction (x) is changed. When the position of the transfer direction (x) of the belt unit 310 is changed, the distance L between the measurement unit K1 and the belt unit 310 in the transfer direction (x) may be adjusted. In this case, the reference of the distance L between the measuring part K1 and the belt part 310 may be the front ends P of the front rollers F1 and F2 of the belt part 310 .

The operator may variously adjust the distance L between the measuring unit K1 and the belt unit 310 in response to the meandering condition.

As described above, specific embodiments of the electrode production system for secondary batteries of the present invention have been described, but it is obvious that various implementation modifications are possible within the limits that do not depart from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, and should be defined by the following claims as well as the claims and equivalents.

That is, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and the meaning and scope of the claims; All changes or modifications derived from the concept of equivalents thereof should be construed as being included in the scope of the present invention.

100: unwinding unit
200: notching part
210: frame
220: upper mold part
221: upper mold
222: upper plate
223: lower plate
230: lower mold part
231: lower mold
232: first plate
240: driving unit
241: first motor
242: first shaft
243: first cam
244: second cam
245: first connecting rod
246: second connecting rod
250: position control unit
251: second motor
252: second shaft
300: feeding unit
310; belt part
320: base
330: the first meandering coordination unit
331: first rail
332: first block
333: first driving unit
400: inspection unit
500: marking unit
600: rewinding unit
700: second meandering coordination unit
S1: first sensor
S2: second sensor
K1: third sensor
K2: Measuring part

Claims (14)

a notching portion for notching the electrode to form an electrode tab; In the secondary battery electrode production system for producing an electrode (electrode) for a secondary battery disposed behind the notched portion, comprising a feeding portion for introducing the notched electrode,
The notching part includes a frame, an upper mold part and a lower mold part disposed to be movable up and down on the frame, and a driving part disposed on the frame and connected to the upper mold part and the lower mold part,
The driving unit includes a first motor, a first shaft connected to the first motor, first and second cams disposed on the first shaft, and a first connecting unit connecting the first cam and the upper mold part. a rod and a second connecting rod connecting the second cam and the lower mold part;
The upper mold part includes an upper mold, an upper plate disposed on the upper mold and movably coupled to the frame from an upper side of the first shaft, and the upper plate is connected to the upper plate and is connected to the frame from a lower side of the first shaft. Including a lower plate coupled to the vertical movement,
The lower mold part includes a first plate and a lower mold disposed on the first plate,
The eccentric direction of the first cam and the eccentric direction of the second cam are opposite to each other, and as the first shaft rotates, the moving direction of the upper mold part and the moving direction of the lower mold part are opposite to each other in the vertical direction. to adjust the vertical separation distance of the upper mold and the lower mold,
The feeding unit;
A belt portion including an upper belt in contact with the upper surface of the electrode and a lower belt in contact with the lower surface of the electrode, a base connected to the belt portion, and a first meander adjustment portion coupled to the base,
The first meander adjustment unit includes a first rail and a first block coupled to the base and slidably coupled to the first rail in a width direction of the electrode perpendicular to the transfer direction of the electrode, and the first block and a first driving unit connected to
The first driving unit is connected to the measuring unit, so that the first height measured by the measuring unit coincides with a reference value, and feedback-controls the position in the width direction of the belt unit. The method of claim 1,
It is disposed on the frame, by adjusting the vertical position of the upper mold, without changing the vertical stroke of the upper mold, further comprising a position adjusting unit for additionally adjusting the vertical separation distance between the upper mold and the lower mold Electrode production system for secondary batteries. 3. The method of claim 2,
The positioning unit includes a second motor disposed on the lower plate, and a second shaft connected to the second motor and including a third cam,
The end of the second connecting rod is coupled to the third cam, and as the second shaft rotates, the vertical position of the second connecting rod is changed to move the lower plate in the vertical direction, thereby forming the upper mold and the upper mold. A secondary battery electrode production system for additionally adjusting the vertical separation distance of the lower mold. 4. The method of claim 3,
The lower plate includes a first groove formed concave on the upper surface, and a first hole formed to communicate from the side to the first groove,
The end of the second connecting rod is located in the first groove,
The second shaft passes through the first hole and is rotatably coupled to an end of the second connecting rod disposed in the first groove. The method of claim 1,
The axial direction of the first shaft is parallel to the transfer direction of the electrode for a secondary battery electrode production system. 4. The method of claim 3,
The axial direction of the second shaft is parallel to the transfer direction of the electrode for a secondary battery electrode production system. 7. The method of claim 6,
The first shaft includes a 1-1 shaft and a 1-2 shaft arranged to be spaced apart of the electrodes,
The first connecting rod includes a 1-1 connecting rod connected to the 1-1 shaft and a 1-2 connecting rod connected to the 1-2 first shaft,
The second connecting rod includes a 2-1 th connecting rod connected to the 1-1 shaft, and a 2-2 connecting rod connected to the 1-2 th shaft, and an electrode production system for a secondary battery. 8. The method of claim 7,
The second shaft includes a 2-1 shaft and a 2-2 shaft arranged to be spaced apart,
The 2-1 shaft is connected to the 2-1 connecting rod,
The 2-2 shaft is an electrode production system for a secondary battery connected to the 2-2 connecting rod. 8. The method of claim 7,
A first gear connected to the first motor, a second gear connected to the 1-1 shaft and meshed with the first gear, and a third gear connected to the 1-2 shaft,
The first gear includes a 1-1 gear and a 1-2 gear coaxially coupled,
The 1-1 gear is shifted by a predetermined angle to the 1-2 gear based on the rotational direction, and the secondary battery electrode production system is disposed. The method of claim 1,
It is disposed at the rear of the notched part, further comprising: an inspection unit for determining whether the notched electrode is defective;
The marking unit includes a punching unit and an air supply unit connected to the punching unit,
The air supply unit supplies air to the punching unit through a first line to lower the punching unit, and through the air discharged to a branch line branched from the first line, scraps of the electrode punched by the punching unit Electrode production system for secondary batteries, characterized in that the push. The method of claim 1,
The vertical stroke of the upper mold part and the vertical stroke of the lower mold part are different from each other for a secondary battery electrode production system. The method of claim 1,
The upper mold part is disposed on the upper plate and includes a plurality of first sensors for sensing the vertical position of the upper mold,
The lower mold part is disposed on the first plate, the secondary battery electrode production system including a plurality of second sensors for sensing the vertical position of the lower mold. The method of claim 1,
A third sensor disposed between the unwinding part and the notched part to control the tension of the electrode, and a third sensor disposed between the capacitor unit and the notched part to detect the boundary line between the coated and uncoated parts of the electrode, and ,
and a second meander adjustment unit disposed between the unwinding unit and the density unit,
The second meandering adjustment unit is a secondary battery production system for adjusting the running direction of the electrode so that the boundary line between the coated and uncoated portion of the electrode detected by the third sensor is located at the reference line. The method of claim 1,
A third sensor disposed between the unwinding part and the notched part to control the tension of the electrode, and a third sensor disposed between the capacitor unit and the notched part to detect the boundary line between the coated and uncoated parts of the electrode, and ,
and a second meander adjustment unit disposed between the density unit and the notching unit,
The second meandering adjustment unit is a secondary battery production system for adjusting the running direction of the electrode so that the boundary line between the coated and uncoated portion of the electrode detected by the third sensor is located at the reference line.

Images