KR102513767B1 - System for producing electrodes of battery - Google Patents

Abstract

The present invention includes an unwinding unit for supplying an electrode material including a coating unit and a non-coating unit; a notching portion for forming an electrode tab by notching the non-coated portion of the electrode material; Measure the first meandering error according to the degree of bending (camber amount) of the electrode material through the first measurement on the output side of the notching part, and measure the position in the width direction of the electrode material through the second measurement on the input side of the notching part. measuring unit; and a meandering adjustment unit that adjusts the driving direction of the electrode material based on the first meandering error and adjusts the widthwise position of the electrode material changed by the adjusted traveling direction at the input side of the notching part. can

Description

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

The present invention relates to a system for producing an electrode for a secondary battery.

In general, a chemical battery refers to a battery that includes a positive electrode, a negative electrode, and an electrolyte and generates electrical energy by using a chemical reaction. This includes a disposable primary battery and a secondary battery that can be charged and discharged for repeated use. can be distinguished by

Due to the advantage of being able to charge and discharge, the use of secondary batteries is gradually increasing. Among such secondary batteries, lithium secondary batteries have a high energy density per unit weight, and thus are widely used as power sources for electronic communication devices or high-output hybrid vehicles.

Electrodes used in these secondary batteries are used as positive and negative electrodes of the battery and are used to electrically connect the battery and the outside of the battery.

The electrode is produced through a process of notching and cutting the electrode material on which the electrode tab is formed at regular intervals.

The electrode material is a strip-shaped member and has a constant width. However, it is common that the edges of both sides of the electrode material are bent during the manufacturing process of the electrode material, resulting in a degree of curvature. In particular, in order to realize high capacity of electric vehicle batteries, the thickness of the electrode material is thin and manufactured with high density, so there is a problem in that the camber amount of the electrode gradually changes according to the degree of curvature. In addition, since the amount of camber deviation is severe for each supplied electrode, a problem occurs that the electrode material runs obliquely on the roll.

In particular, when the electrode material entering the notching part meanders, defects occur in the electrode tab.

Republic of Korea Patent Publication No. 10-2015-0089803 (2015.08.05. Publication)

An object of the present invention is to provide an electrode production system for a secondary battery capable of preventing meandering of an electrode material of a roll in response to the amount of camber of the electrode material.

Embodiments include an unwinding unit for supplying an electrode material including a coating unit and a non-coating unit; a notching portion for forming an electrode tab by notching the non-coated portion of the electrode material; The first measuring unit that measures the first meandering error according to the degree of warp (camber amount) of the electrode material through the first measurement at the output side of the notching part and the second measurement at the input side of the notching part in the width direction of the electrode material a measuring unit provided with a second measuring unit for measuring a position; and a meandering adjustment unit that adjusts the driving direction of the electrode material based on the first meandering error and adjusts the widthwise position of the electrode material changed by the adjusted traveling direction at the input side of the notching part. can

Preferably, the meandering adjusting unit may include a first meandering adjusting unit that rotates the roll around a first axis perpendicular to the axial direction of the roll for transporting the electrode material and linearly moves the first axis.

Preferably, the meandering adjustment unit may include a second meandering adjustment unit that linearly moves the unwinding unit.

Preferably, it is disposed on the output side of the notching part and further includes a feeding device for fixing the electrode material in the width direction, and the first meandering adjustment unit adjusts the running direction of the electrode material based on the feeding device, thereby reducing the first meandering error. It is possible to correct the second meandering error at the point where the calculated first meandering adjustment unit is installed using

Preferably, the second measuring unit is disposed between the first meandering adjusting unit and the notching part, and includes a sensor for detecting a boundary line between the coated part and the non-coated part, and the first meandering adjusting unit is coated at a first point where the sensor is located. The running direction of the electrode material can be adjusted so that the boundary line between the part and the non-coated part (object to be controlled) is positioned at the correct position (reference position).
Preferably, it further includes a feeding device disposed behind the first measuring unit, and the second meandering adjustment unit can adjust the position of the electrode material in the width direction based on the front-back center of the feeding device.
Preferably, the feeding device is disposed at the rear of the first measuring unit, and the second meandering adjustment unit can adjust the position of the electrode material in the width direction based on the center of the feeding device in the front-back direction.

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Preferably, the first meandering adjustment unit comprises: a first member and a second member spaced apart from each other; a first roll disposed between the first member and the second member and rotatably coupled to the first member and the second member about a third axis; a second roll disposed between the first member and the second member and rotatably coupled to the first member and the second member about a fourth axis; The first axis includes a 1-1 axis and a 1-2 axis, and a third member rotatably coupled to the first member around the 1-1 axis perpendicular to the third axis and perpendicular to the fourth axis. A fourth member rotatably coupled to the second member about the 1-2 axis; Base; And a driving unit coupled to the fourth member, the third member is coupled to the base to be linearly movable along the first direction, the fourth member is coupled to the base to be linearly movable along the second direction, the second When the fourth member linearly moves, the member engages with the fourth member so as to rotate about first and second axes, and the driving unit adjusts the amount of linear movement of the fourth member.

Preferably, the second meandering adjustment unit may be slidably coupled to the first base to which the unwinding unit is fixed.

According to the embodiment, there is an advantage in that the position of the roll can be automatically adjusted in response to the amount of camber of the electrode material.

According to the embodiment, there is an advantage in preventing meandering of various types of electrode materials having different camber amounts.

According to the embodiment, by adjusting the driving direction of the electrode material immediately before entering the notching part, there is an advantage in that occurrence of defects in the electrode can be greatly reduced.

According to the embodiment, by changing the running direction of the electrode material in the densityr unit and additionally changing the running direction of the electrode material before entering the notching part, there is an advantage in that meandering of the electrode material having a large camber can be adjusted.

According to the embodiment, by adjusting the position of the electrode material in the width direction based on the center of the front and rear direction of the feeding device which is constantly fixing the electrode material in the width direction, there is an advantage in that meandering adjustment is easy.

1 is a front view showing an electrode production system for a secondary battery according to an embodiment;
2 is a plan view showing an electrode material;
3 is a view showing a notching part and a first measuring part;
4 is a diagram showing the amount of camber of an electrode material;
5 is a view showing an electrode material with a relatively smaller camber amount than the electrode material shown in FIG. 4;
6 is a view showing an electrode material having a relatively large camber amount than the electrode material shown in FIG. 4;
7 is a view showing an electrode material in which an electrode tab is formed;
8 is a block diagram showing a meandering adjustment unit;
9 is a front view showing a first meandering adjustment unit;
10 is a side view showing a first meandering adjustment unit;
11 is a plan view of a first roll and a second roll viewed from above;
12 is a view showing a state in which the traveling direction of the electrode material is adjusted to one side in the state of FIG. 11;
13 is a view showing a state in which the traveling direction of the electrode material is adjusted to the other side in the state of FIG. 11;
14 is a view showing a state in which the running direction of the electrode material is adjusted based on the center of the width of the feeding device.

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

Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and the following examples may be modified in many different forms, and the scope of the present invention It is not limited to the examples below. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the spirit of the invention to those skilled in the art.

Terms used in this specification are used to describe specific embodiments and are not intended to limit the present invention. As used herein, the singular form may include the plural form unless the context clearly indicates otherwise. Also, when used herein, "comprise" and/or "comprising" specifies the presence of the recited shapes, numbers, steps, operations, elements, elements, and/or groups thereof. and does not exclude the presence or addition of one or more other shapes, numbers, operations, elements, elements and/or groups. As used herein, the term "and/or" includes any one and all combinations of one or more of the listed items.

Although terms such as first and second are used in this specification to describe various members, regions, and/or regions, it is obvious that these members, components, regions, layers, and/or regions should not be limited by these terms. do. These terms do not imply any particular order, top or bottom, or superiority or inferiority, and are used only to distinguish one element, region or region from another element, region or region. Thus, a first element, region or region described in detail below may refer to a second element, region or region without departing from the teachings of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to drawings schematically showing embodiments of the present invention. In the drawings, variations of the depicted shape may be expected, depending, for example, on manufacturing techniques and/or tolerances. Therefore, the embodiments of the present invention should not be construed as being limited to the specific shape of the region shown in this specification, but should include, for example, a change in shape caused by manufacturing.

The electrode production system for secondary batteries is a device for automatically and continuously producing electrodes used in secondary batteries.

Hereinafter, in the drawings, the direction indicated by the x-axis is the longitudinal direction of the secondary battery electrode production system, and indicates the transfer direction of the electrode material. In the figure, the direction indicated by the y-axis is the front-back direction of the secondary battery electrode production system and the width direction of the electrode material, and the direction indicated by the z-axis is the height direction of the secondary battery electrode production system.

1 is a front view illustrating a system for producing an electrode for a secondary battery according to an embodiment.

As shown in FIG. 1, the secondary battery electrode production system according to the embodiment includes an unwinding unit 10, a denser unit 20, a notching unit 30, and although not shown in the drawing, a cutting unit and an aligning device and a magazine. An electrode material (S) formed of a strip-shaped metal plate extending horizontally is supplied from the unwinding unit 10 at the inlet side. The electrode material S may be formed of copper in the case of producing a negative electrode battery, and may be formed of aluminum in the case of producing a positive electrode battery.

The densityr unit 20 guides the electrode material S supplied from the unwinding part 10 to the notching part 30, and adjusts the tension of the electrode material S in response to the change in the supply speed of the electrode material S. Adjust.

The notching part 30 produces an electrode by forming an electrode tab (Sc in FIG. 2) on the supplied electrode material S. The notching part 30 forms an electrode tab Sc on the electrode material S through a mold that moves up and down. Specifically, notches are formed in the electrode material S at regular intervals to create an electrode including an electrode tab Sc protruding to one side. A feeding device (70 in FIG. 3) may be provided to continuously supply electrodes from the rear of the notching portion 30 by continuously moving the electrode passing through the notching portion 30 in a pulling method. This feeding device can pull the electrode material (S) at different speeds or tensions that are periodically repeated.

The cutting unit 40 cuts the electrode into the required size of the product. The cut electrode is supplied to the aligning device and the magazine 50 . The align device and magazine 50 align and load the electrodes.

Figure 2 is a plan view showing the electrode material (S), Figure 3 is a view showing a notching portion and a first measurement portion,

1 to 3, the electrode material (S) may be divided into a coating portion (Sa) and a non-coating portion (Sb). The uncoated portion Sb is a portion where the remaining area is formed as the electrode tab Sc by being cut in the notched portion 30 . The sensor (second measuring unit) 80 may be disposed at a first point (V1 in FIG. 2) located right in front (input side) of the notching part 30 based on the transfer direction (x) of the electrode material. . The sensor (second measuring unit) 80 detects the position of the electrode material S in the width direction, that is, the boundary T between the coated portion Sa and the non-coated portion Sb. The first measuring unit 90 may be disposed at a second point (V2 in FIG. 2) located right behind (output side) of the notching unit 30 in the transport direction (x).

4 is a view showing the degree of bending of the electrode material (S), that is, the amount of camber, and FIG. 5 is a view showing the electrode material (S) having a relatively smaller camber amount than the electrode material (S) shown in FIG. 6 is a view showing an electrode material (S) having a relatively large camber amount than the electrode material (S) shown in FIG. 4.

A variety of electrode materials (S) with different amounts of camber may be supplied. For example, the camber amount CB' of the electrode material S shown in FIG. 5 is relatively smaller than the camber amount CB of the electrode material S shown in FIG. 4, whereas the electrode shown in FIG. 6 The camber amount CB″ of the material S may be relatively greater than the camber amount CB of the electrode material S shown in FIG. 4 . Here, the amount of camber represents the degree of curvature of the electrode material (S), and is the difference between the position of the non-coated part (Sb) at the end of the electrode material (S) and the normal position of the non-curved part (Sb). can be expressed as This amount of camber may be expressed based on the width direction (y) of the electrode material (S).

In this way, when the camber amount is different for each electrode material S, since the boundary between the coated portion Sa and the non-coated portion Sb (T in FIG. 2) is different for each electrode material S, the electrode at the first point V1 Even if the forward running of the material S is confirmed, defects may occur in the electrode tab Sc in the notching process after passing the first point V1. The sensor (second measuring unit) 80 is disposed at the boundary T between the coated portion Sa and the non-coated portion Sb and measures the entire length of the electrode material S disposed long along the transport direction x. In consideration, since the first point V1 is only one point, the boundary between the coated portion Sa and the non-coated portion Sb (object to be controlled) is at the correct position (reference position) at the first point V1. Even so, the actual electrode material S may meander.

In order to solve this problem, the first measurement unit 90 is disposed right behind (output side) of the notching unit 30, and is controlled by the first meandering adjustment unit 61 in response to electrode materials S having different camber amounts. Provide information.

7 is a view showing an electrode material S on which an electrode tab Sc is formed.

Referring to FIGS. 1 and 7 , the first measuring unit 90 may obtain an image of the electrode material S output from the notching unit 30 at the second point V2 . The first measuring unit 90 measures the first meandering error in the obtained image, that is, the cut first height W of the coating portion Sa based on the width direction y of the electrode material S. If the meander is adjusted in response to the camber amount of the electrode material (S), since the coating portion (Sa) is not cut, there is no first cut height (W), and the edge of the coating portion (Sa) maintains a straight line without a step Will do. This first measuring unit 90 may include a vision camera or sensor.

8 is a block diagram illustrating a meandering adjustment unit.

Referring to FIG. 8 , the meandering adjustment unit 60 may include a first meandering adjustment unit 61 and a second meandering adjustment unit 62 .

The first meandering adjustment unit 61 adjusts the traveling direction of the electrode material using the first height W (first meandering error) measured by the first measuring unit 90 .

The first meandering adjustment unit 61 rotates the roll around a first axis (C3 and C4 in FIG. 9) perpendicular to the axial direction of the roll for transporting the electrode material S, and the first axis C3, It is a device that moves C4) in a straight line.

The second meandering adjusting unit 62 is the width of the electrode material put into the notching part 30 based on the first height W after the driving direction of the electrode material is adjusted in the first meandering adjusting unit 61. Adjust the direction (y) position.

The second meandering adjustment unit 62 linearly moves the unwinding unit 10, the denser unit 20, and the first meandering adjustment unit 61 along the forward and backward direction y of the unwinding unit 10. It is a device.

FIG. 9 is a front view showing the first meandering adjusting unit 61, and FIG. 10 is a side view showing the first meandering adjusting unit 61.

Referring to FIGS. 9 and 10 , the first meandering adjustment unit 61 includes a first member 110 and a second member 120 spaced apart from each other.

The first member 110 and the second member 120 may be spaced apart from each other in the front-back direction (y). Also, the first meandering control unit 61 may include a first roll 130 and a second roll 140 . The first roll 130 and the second roll 140 are disposed between the first member 110 and the second member 120 . The first roll 130 is rotatably disposed around a third axis C1 between the first member 110 and the second member 120 . The second roll 140 is rotatably disposed around a fourth axis C2 between the first member 110 and the second member 120 .

Based on the conveying direction (x), the first roll 130 is an entry-side roll of the electrode material S based on the first meandering adjustment unit 61, and the second roll 140 is the electrode material S ) may be an exit roll. The axial direction of the third axis C1 and the axial direction of the fourth axis C2 are directions parallel to the front-back direction y. The first roller 130 may contact a nip roll (Z in FIG. 1 ) to increase frictional force.

The second roll 140 disposed on the exit side may be connected to the motor 150 . Accordingly, the second roll 140 may be a drive roll and the first roll 130 may be a driven roll. In the case of the electrode material S having a thin thickness, it is necessary to reduce the amount of tension in the first meandering adjustment unit 61. By rotating the second roll 140 through the motor 150, the electrode material S tension can be reduced.

The electrode material (S) enters the first roll 130 from the upper side of the reference line (Q), crosses the reference line (Q) in a diagonal direction, and enters the second roll 140 from the lower side of the reference line (Q). Hereinafter, the reference line (Q) means an imaginary line passing through the third axis (C1) of the first roll 130 and the fourth axis (C2) of the second roll. Since the electrode material S passes diagonally between the first roll 130 and the second roll 140, it is easy to change the running direction and adjust the tension of the electrode material S to prevent meandering.

The first axis includes a 1-1 axis C3 and a 1-2 axis C4.

The third member 160 may be disposed below the first member 110 . The first member 110 is rotatably coupled to the third member 160 about the 1-1 axis C3.

The fourth member 170 may be disposed below the second member 120 . The fourth member 170 is rotatably coupled to the second member 120 about the first-second axis C4.

An axial direction of the 1-1 axis C3 and an axial direction of the 1-2 axis C4 are directions parallel to the height direction z. Based on the transfer direction (x), the position of the 1-1 axis (C3) and the position of the 1-2 axis (C4) may be aligned.

The third member 160 and the fourth member 170 are each disposed on the base 180 to be linearly movable with a constant stroke. The third member 160 and the fourth member 170 may be disposed so that the linear movement direction is inclined with the axial direction of the third axis C1 and the axial direction of the fourth axis C2.

The power converter WS may be disposed on the fourth member 170 . The power converter WS converts the linear movement of the fourth member 170 into a rotational movement of the second member 120 rotating around the first-second axis C4. Also, the fourth member 170 may be coupled to the driving unit 190 . The driving unit 190 linearly moves the fourth member 170 . The driving unit 190 may include a motor, and an axial direction of the motor may be disposed parallel to a moving direction of the fourth member 170 . The motor of the driving unit 190 may include a lead screw connected to the fourth member 170 .

The third member 160 may move linearly in conjunction with the linear movement of the fourth member 170 . Meanwhile, as the second member 120 rotates, the first member 110 may rotate in conjunction with each other.

11 is a plan view of the first roll 130 and the second roll 140 viewed from above.

Referring to FIG. 11 , the axial direction of the third axis C1 and the vertical direction of the fourth axis C2 are the forward running direction A of the electrode material S. The 1-1 axis (C3) and the 1-2 axis (C4) are disposed between the third axis (C1) and the fourth axis (C2) based on the transfer direction (x).

FIG. 12 is a view showing a state in which the running direction of the electrode material S is adjusted to one side in the state of FIG. 11 .

Referring to FIGS. 2 and 12, the boundary between the coated part (Sa) and the non-coated part (Sb) of the electrode material (S) through the sensor (second measuring part) 80 at the first point (V1) When the absolute upper body) is not located at the correct position (reference position), the drive unit 190 moves the boundary T (object to be controlled) between the coated part Sa and the non-coated part Sb of the electrode material S The running directions of the first roll 130 and the second roll 140 are changed so as to come to the correct position (reference position).

The process of changing the traveling direction of the first roll 130 and the second roll 140 is as follows.

For example, when the driving unit 190 operates, the fourth member 170 linearly moves. When the fourth member 170 linearly moves, the second member 120 may rotate clockwise about the first-second axis C4 in the drawing. Since the fourth member 170 linearly moves, the first and second axes C4 also linearly move, and thus the second member 120 also linearly moves. While the fourth member 170 linearly moves, the third member 160 also linearly moves in conjunction with the fourth member 170, and at the same time, the first member 110 rotates clockwise around the third axis C1. can do.

Since the first member 110 and the second member 120 rotate clockwise in this way, the third axis C1 of the first roll 130 and the fourth axis C2 of the second roll 140 are tilted. while the driving direction (A ') of the electrode material (S) is changed to one side.

FIG. 13 is a view showing a state in which the traveling direction of the electrode material S is adjusted to the other side in the state of FIG. 11 .

Referring to FIGS. 2 to 13 , the traveling direction of the electrode material (S) may be adjusted to the other side according to the meandering direction of the electrode material (S).

The process of changing the running direction of the first roll 130 and the second roll 140 corresponding to this is as follows.

For example, when the driving unit 190 operates, the fourth member 170 linearly moves in a second direction different from the first direction. When the fourth member 170 linearly moves, the second member 120 may rotate counterclockwise around the first-second axis C4 in the drawing. Since the fourth member 170 linearly moves, the first and second axes C4 also linearly move, and thus the second member 120 also linearly moves. While the fourth member 170 linearly moves, the third member 160 also linearly moves in conjunction with the fourth member 170, and at the same time, the second member 120 rotates counterclockwise around the third axis C1. can rotate

Since the first member 110 and the second member 120 rotate counterclockwise in this way, the third axis C1 of the first roll 130 and the fourth axis C2 of the second roll 140 are While tilting, the traveling direction (A') of the electrode material (S) is changed to the other side.

14 is a view showing a state of adjusting the running direction of the electrode material (S) based on the center of the front and rear directions of the feeding device.

Referring to FIG. 14, in the first meandering adjustment unit 61, when adjusting the traveling direction of the electrode material S, the front and rear center CP of the feeding device 70 disposed behind the notching part 30 This criterion can be The feeding device 70 serves to supply the notched electrode to the cutting part 40 . Since the feeding device 70 fixes the electrode in the forward and backward direction (y), it may be a reference for adjusting the running direction of the electrode material (S) in the first meandering adjustment unit (61).

For example, a first distance D1, which is a linear distance from the center of the width (CP) of the starting point of the feeding device 70 to the first measuring unit 90, and the first distance D1 detected by the first measuring unit 90 The first angle R1 can be calculated by using a trigonometric function based on the height W (first meandering error). If a trigonometric function is used based on the calculated first angle R1 and the second distance D2, the amount of deviation X can be calculated at the third point V3. The deviation amount X (second meandering error) appears along the width direction y.

Here, the second distance (D2) means a straight line distance from the width center (CP) of the starting point of the feeding device 70 to the third point (V3). Here, the third point (V3) may correspond to the position of the first meandering adjustment unit 61 based on the transfer direction (x) of the electrode material. For example, the third point V3 may correspond to the position of the second roll 140 of the first meandering adjustment unit 61 based on the transfer direction (x) of the electrode material.

The first meandering adjustment unit 61 may adjust the driving direction of the electrode material S based on the amount of deviation X.

Referring to FIG. 3 , the second meandering adjustment unit 62 may include a first base 62a and a second base 62b. The unwinding unit 10, the denser unit 20, and the first meandering adjustment unit 61 may be fixed to the first base 62a. The second base 62b is disposed below the first base 62a. The first base 62a is slidably disposed along the second base 62b. The first base 62b or the second base 62b may be provided with a motor for providing power and various power transmission means for converting the rotational motion of the motor into linear motion.

When the first base 62a moves along the front-back direction y, the first meandering adjustment unit 61 moves as a whole along the front-back direction y, and the coating portion Sa at the first point V1 The position of the boundary T between the and the non-coating portion Sb is adjusted.

The meandering adjustment process using the first meandering adjustment unit 61 and the second meandering adjustment unit 62 is as follows.

First, through the first meandering adjustment unit 61, the driving direction of the electrode material S is adjusted based on the deviation amount X so that the first height W matches the standard size.

When the traveling direction of the electrode material S is adjusted by the first meandering adjustment unit 61, at the first point V1, the boundary T between the coated portion Sa and the non-coated portion Sb (adjustable table) Upper body) is located out of the normal position (standard position). This is confirmed through the sensor (second measuring unit) 80.

Next, the second meandering adjustment unit 62 checks the position of the boundary T between the coated portion Sa and the non-coated portion Sb detected by the sensor (second measuring unit) 80, and the boundary ( The position of the first meandering adjustment unit 61 in the front-back direction (y) may be adjusted so that T) (object to be controlled) is positioned at the correct position (reference position).

In this way, by using the second meandering adjusting unit 62 together with the first meandering adjusting unit 61, it is possible to effectively prevent the occurrence of defects in the electrode tab in response to various electrode materials having different cambers.

In the above, specific embodiments of the secondary battery electrode production system of the present invention have been described, but it is obvious that various modifications are possible within the limits that do not deviate from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined, and should be defined by not only the claims to be described later, but also those equivalent to these claims.

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 and All changes or modified forms derived from the equivalent concept should be construed as being included in the scope of the present invention.

10: unwinding part
20: Densor unit
30: notching part
40: cutting part
50: align device and magazine
60: meandering adjustment department
61: first meandering adjustment unit
62: second meandering adjustment unit
70: feeding device
80: sensor (second measuring unit)
90: first measuring unit
110: first member
120: second member
130: first roll
140: second roll

Claims (8)

An unwinding unit supplying an electrode material including a coating unit and a non-coating unit;
a notching portion forming an electrode tab by notching the non-coated portion of the electrode material;
A first measurement unit for measuring a first meandering error according to the degree of warpage (camber amount) of the electrode material through a first measurement at the output side of the notching unit and a second measurement at the input side of the notching unit. The electrode material a measuring unit provided with a second measuring unit for measuring the position of the width direction; and
A meander adjustment unit for adjusting the running direction of the electrode material based on the first meandering error and adjusting the width direction position of the electrode material changed by the adjusted running direction at the input side of the notching part,
Secondary battery production system. According to claim 1,
The meandering adjustment unit includes a first meandering adjustment unit that rotates the roll around a first axis perpendicular to an axial direction of the roll for transporting the electrode material and linearly moves the first axis. According to claim 2,
The meandering adjustment unit includes a second meandering adjustment unit that linearly moves the unwinding unit. According to claim 3,
Further comprising a feeding device disposed on the output side of the notching part and fixing the electrode material in the width direction,
The first meandering adjustment unit corrects the second meandering error calculated using the first meandering error at the point where the first meandering adjustment unit is installed by adjusting the traveling direction of the electrode material based on the feeding device. doing,
Secondary battery production system. According to claim 2,
The second measuring unit includes a sensor disposed between the first meandering adjustment unit and the notching unit to detect a boundary line between the coated unit and the non-coated unit,
The first meandering adjustment unit controls the running direction of the electrode material so that the boundary line (object to be controlled) of the coated part and the non-coated part is positioned at the correct position (reference position) at the first point where the sensor is located. production system. The method of claim 4, wherein the feeding device,
It is disposed behind the first measuring unit,
The second meandering adjustment unit is a secondary battery production system for adjusting the position of the electrode material in the width direction based on the center of the front and rear direction of the feeding device. According to claim 2,
The first meandering adjustment unit,
a first member and a second member disposed spaced apart from each other;
a first roll disposed between the first member and the second member and rotatably coupled to the first member and the second member about a third axis;
a second roll disposed between the first member and the second member and rotatably coupled to the first member and the second member about a fourth axis;
The first axis includes a 1-1 axis and a 1-2 axis,
A third member rotatably coupled to the first member about the 1-1 axis perpendicular to the third axis, and
a fourth member rotatably coupled to the second member around the first-second axis perpendicular to the fourth axis;
Base; and
Including a driving unit coupled to the fourth member,
The third member is coupled to the base to be linearly movable along a first direction,
The fourth member is coupled to the base to be linearly movable along a second direction,
The second member is engaged with the fourth member to rotate about the first-second axis when the fourth member moves linearly,
The secondary battery production system of claim 1 , wherein the driving unit controls the amount of linear movement of the fourth member. According to claim 3,
The second meandering adjustment unit is slidably coupled to the first base to which the unwinding unit is fixed.

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