KR102604874B1 - Cutting device for electrode sheet - Google Patents

Abstract

A cutting device for electrode sheets is disclosed. In this embodiment, when cutting the electrode sheet, cutting is always made consistently on the left and right sides in the width direction, so that the cutting stability for the electrode sheet is maintained constant.

Description

Cutting device for electrode sheet}

The present invention is for cutting electrode sheets, and more specifically relates to a cutting device for electrode sheets.

Recently, compact and lightweight portable electrical/electronic devices such as cellular phones, laptop computers, and camcorders have been actively developed and produced. These portable electrical/electronic devices have a built-in battery pack so that they can be operated even in places without a separate power source. The built-in battery pack has at least one battery inside to output a certain level of voltage to drive the portable electric/electronic device for a certain period of time.

Considering economic aspects, the battery pack has recently adopted secondary batteries that can be charged and discharged. Representative examples of secondary batteries include lithium secondary batteries such as nickel-cadmium (Ni-Cd) batteries, nickel-hydrogen (Ni-MH) batteries, lithium (Li) batteries, and lithium ion (Li-ion) batteries. there is.

In particular, lithium secondary batteries have an operating voltage of 3.6V, which is three times higher than nickel-cadmium batteries or nickel-hydrogen batteries, which are widely used as power sources for portable electronic equipment, and are rapidly growing in terms of their high energy density per unit weight. am.

Typically, the lithium secondary battery is positioned between a positive electrode plate coated with a positive electrode active material, a negative electrode plate coated with a negative electrode active material, and between the positive electrode plate and the negative electrode plate to prevent short circuits and prevent lithium ions (Li-ions) from flowing through the battery. It consists of an electrode assembly on which a separator that only allows movement is wound, a case for a lithium secondary battery that accommodates the electrode assembly, and an electrolyte solution that is injected into the inside of the case for a lithium secondary battery to enable movement of lithium ions.

Electrode sheets for secondary batteries are unwound from a wound roll and cut to a specific length to suit the structure of the battery being used. The unrolled electrode sheet is transported at regular pitches and then cut by a cutting unit. The cutting process must be performed in a short time without causing cutting defects.

The electrode sheet is in the form of a thin film, and in order to perform a smooth cutting process, tension must be applied to the electrode to facilitate the cutting action of the cutting blade.

The cutting unit includes an upper cutter, a lower cutter, and an actuator that lowers the upper cutter to the lower cutter.

When the actuator is activated, the upper cutter moves down toward the lower cutter to cut the electrode sheet. However, since the actuator is located on one side, a problem arises in which the left and right horizontality is not maintained consistently during cutting.

In this case, the electrode sheet had a problem in that the cutting surface was not cut horizontally and was cut crookedly to one side.

In this case, the quality of the electrode sheet deteriorates, unnecessary losses occur, and a lot of time is spent on repairs and maintenance of the cutting unit, resulting in a decrease in productivity and an increase in manufacturing costs, which requires countermeasures. It has been done.

Republic of Korea Patent Publication No. 10-2006-0052813

In these embodiments, when the upper cutter moves toward the lower cutter to cut the electrode sheet, the exact moving position of the upper cutter is detected and the horizontal state is maintained. A cutting device for electrode sheets is used to cut the electrode sheet. We would like to provide

The cutting device for electrode sheets according to this embodiment includes a main frame extended to a predetermined length; an actuator coupled to one side of the main frame; a first guide portion provided on one side of the main frame adjacent to the actuator; a second guide part spaced apart from the actuator and located on the other side of the main frame; an upper cutter coupled to the actuator and located on the upper side of the main frame, maintained in a horizontal state by the first and second guide parts and moved upward or downward according to the operation of the actuator; a lower cutter installed on the front of the main frame and located below the upper cutter; and a detection unit provided on the other side of the main frame to detect whether the upper cutter has actually moved toward the lower cutter.

The upper cutter is provided with a support bracket that maintains the coupled state in some sections on one side and the other side in the longitudinal direction of the lower surface.

The first guide member includes a first guide member provided on the left side of the actuator, one end of which is fixed to the support bracket, and the other end of which is inserted into the main frame; It includes a second guide member provided on the right side of the actuator, one end of which is fixed to the support bracket, and the other end of which is inserted into the main frame.

Together with the first guide part, the second guide part includes a third guide member with one end fixed to the support bracket and the other end inserted into the main frame; It includes a fourth guide member provided on one side of the third guide member, one end of which is fixed to the support bracket, and the other end of which is inserted into the main frame.

The first and second guide members and the third and fourth guide members are formed to have the same diameter.

The first guide member may have a relatively larger diameter than the second guide member.

The third and fourth guide members are formed with the same diameter.

The fourth guide member may have a relatively larger diameter than the third guide member.

The actuator has an extended end of a piston rod provided at the inner center coupled to the lower surface of the support bracket, so that the support bracket connected to the piston rod rises or falls depending on the operation of the actuator.

A first guide bush is inserted into the first and second guide members in the axial direction.

A second guide bush is inserted into the third and fourth guide members in the axial direction.

The support bracket includes a first connection bracket coupled to one end of the first guide portion and the actuator;

a second connection bracket coupled to one end of the second guide portion; It includes a third connection bracket connecting the first and second connection brackets.

The main frame is provided with a sensor bracket, one end of which extends outward to a predetermined length after being coupled, and the other end of which is bent vertically toward the upper cutter, and the detection unit is connected to the upper cutter in the longitudinal direction inside the sensor bracket. a first detection unit for detecting a position where the is lowered toward the lower cutter; a second detection unit located above the first detection unit and configured to detect a position in which the upper cutter is spaced apart from the lower cutter and raised upward; It is fixed to a support bracket facing the sensor bracket and includes a marker located on the front of the first or second detection unit according to the lowering or raising of the upper cutter.

The marker includes: a first extension extending from the front to the back of the main frame in the width direction of the support bracket when viewed from the top; It includes a second extension portion bent from the first extension toward the sensing unit.

These embodiments can stably cut the electrode sheet in a horizontal state.

In these embodiments, the position of the upper cutter is accurately detected and the electrode sheet is cut only when the upper cutter is moved to a preset position, thereby improving safety during cutting.

In these embodiments, cutting is performed consistently without loss or damage to the electrode sheet, thereby reducing manufacturing costs.

1 is a perspective view showing a cutting device for electrode sheets according to this embodiment.
Figure 2 is a diagram showing a state in which the upper cutter is lowered toward the lower cutter according to this embodiment.
3 to 4 are longitudinal cross-sectional views of the cutting device for electrode sheets according to this embodiment.
Figure 5 is a cross-sectional view showing another example of the first guide part according to this embodiment.
Figure 6 is a cross-sectional view showing another example of the second guide part according to this embodiment.

The advantages and features of this post, and how to achieve them, will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, this posting is not limited to the embodiments posted below and will be implemented in various different forms. These embodiments only ensure that the posting of this posting is complete, and those with ordinary knowledge in the technical field to which this posting belongs will It is provided to fully inform users of the category of the posting, and this posting is only defined by the category of the claims. Like reference numerals refer to like elements throughout the specification.

A component is said to be “connected to” or “coupled to” another component when it is directly connected or coupled to another component or with an intervening other component. Includes all cases. On the other hand, when one component is referred to as “directly connected to” or “directly coupled to” another component, it indicates that there is no intervening other component. “And/or” includes each and every combination of one or more of the mentioned items.

The terms used in this specification are for describing embodiments and are not intended to limit this posting. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, “comprises.” and/or “comprising” means that a referenced component, step, operation and/or element does not exclude the presence or addition of one or more other components, steps, operations and/or elements.

Although first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are merely used to distinguish one component from another.

The cutting device for electrode sheets according to this embodiment will be described with reference to the drawings. The attached Figure 1 is a perspective view showing a cutting device for electrode sheets according to this embodiment, Figure 2 is a diagram showing a state in which the upper cutter is lowered toward the lower cutter according to this embodiment, and Figures 3 and 4 is a longitudinal cross-sectional view of the cutting device for electrode sheets according to this embodiment.

Referring to the attached FIGS. 1 to 4, in the cutting device 1 for an electrode sheet according to this embodiment, when cutting the electrode sheet 2 to a predetermined length, the upper cutter 500 uses the lower cutter 600. It is intended to accurately cut the electrode sheet 2 by detecting whether it has been accurately lowered to a preset position.

For this purpose, this embodiment includes a main frame 100 extended to a predetermined length, an actuator 200 coupled to one side of the main frame 100, and the main frame 100 adjacent to the actuator 200. A first guide part 300 provided on one side of the actuator 200 is coupled to a second guide part 400 located on the other side of the main frame 100 and spaced apart from the actuator 200. The upper cutter 500 is located on the upper side of the main frame 100 and is maintained in a horizontal state by the first and second guide parts 300 and 400 and moves upward or downward according to the operation of the actuator 200. ), the lower cutter 600 installed on the front of the main frame 100 and located below the upper cutter 500, and whether the upper cutter 500 has actually moved toward the lower cutter 600. It includes a detection unit 700 provided on the other side of the main frame 100 for detection.

The main frame 100 according to this embodiment is provided to install the above-described upper and lower cutters 500 and 600, the actuator 200, the first and second guide parts 300 and 400, and the detection part 700.

The main frame 100 extends to a predetermined length in the horizontal direction, the actuator 200 is installed on the left side based on the drawing, the upper cutter 500 is located on the upper side, and the lower cutter 600 is placed on the front. do.

And a first guide part 300 is disposed on one side of the main frame 100 adjacent to the actuator 200, and a second guide part 400 is disposed on the other side of the main frame 100, and the main frame ( A detection unit 700 is installed at the other end of 100).

In the main frame 100, the actuator 200 is provided on the left side based on the drawing, and the first guide part 300, which will be described later, is located adjacent to it. In this embodiment, the electrode sheet 2 is cut as the upper cutter 500 is lowered or raised toward the lower cutter 600.

The electrode sheet 2 is inserted between the upper cutter 500 and the lower cutter 600, and a guide plate 50 is installed on the central upper surface of the main frame 100 to enable stable insertion.

The guide plate 50 has an elastic member (S) located spaced apart from the upper surface of the main frame 100, one end of which is fixed to the upper surface of the main frame 100, and the other end of which is fixed to the lower surface of the guide plate 50. It is provided.

The guide plate 50 serves to guide the insertion direction between the upper cutter 500 and the lower cutter 600 when the electrode sheet 2 is cut. The elastic member (S) is provided to absorb vertical displacement that occurs when the electrode sheet (2) is cut.

The actuator 200 according to this embodiment is a pneumatically operated actuator, but it may also be possible to use an actuator in a different form or with a different operating method.

The actuator 200 has an extended end of the piston rod 210 provided at the inner center coupled to the lower surface of a support bracket 800 to be described later, so that the piston rod 210 and the piston rod 210 are connected according to the operation of the actuator 200. The connected support bracket 800 is raised or lowered together.

The upper cutter 500 according to this embodiment is provided with a support bracket 800 that is maintained in a coupled state in some sections on one side and the other side in the longitudinal direction of the lower surface. The support bracket 800 includes a first connection bracket 810 coupled to one end of the first guide portion 300 and the actuator 200, and a first connection bracket coupled to one end of the second guide portion 400. It includes two connection brackets 820 and a third connection bracket 830 connecting the first and second connection brackets 810 and 820.

A first guide part 300, which will be described later, is coupled to the first connection bracket 810, and a second guide part 400 is coupled to the second connection bracket 820. The second connection bracket 820 extends shorter than half of the length of the first connection bracket 810 or longer than half.

That is, since the second guide part 400 is coupled to the second connection bracket 820, it extends to the length shown in the drawing.

The first guide unit 300 according to this embodiment includes a first guide member 310 and a second guide member 320. The first guide part 300 is provided to ensure stable movement of the upper cutter 500 together with the second guide part 400, which will be described later.

In particular, when the upper cutter 500 moves toward the lower cutter 600, it moves horizontally together with the second guide part 400 to ensure stable cutting of the electrode sheet 2.

The first guide member 310 is provided on the left side of the actuator 200, one end is fixed to the support bracket 800, and the other end is inserted into the main frame 100.

The second guide member 320 is provided on the right side of the actuator 200, one end is fixed to the support bracket 800, and the other end is inserted into the main frame 100.

The first and second guide members 310 and 320 are formed in a piston shape with a predetermined diameter and length, but may also be changed to other shapes.

The second guide part 400 is provided with a third guide member 410 and a fourth guide member 420. That is, in this embodiment, the first guide part 300 is formed as a pair, and the second guide part 400 is also formed as a pair, so that when the upper cutter 500 is moved, the right side is aligned with the left side based on the drawing. It can be moved to a horizontal state in the same way. In this case, the electrode sheet 2 can be cut accurately without being inaccurately performed at some positions.

The third guide member 410 has one end fixed to the support bracket 800 and the other end is inserted into the main frame 100, and the fourth guide member 420 is connected to the third guide member 410. It is provided on one side, one end is fixed to the support bracket 800, and the other end is inserted into the main frame.

In this embodiment, the second guide portion 400 is formed as a pair, so that the upper cutter 500 is maintained in the same horizontal state as the left side at the right position of the main frame 100 based on the drawing and moves upward or downward. It can be.

In this case, the electrode sheet 2 can be accurately cut in a horizontal state by the upper cutter 500 lowered toward the lower cutter 600, thereby improving cutting stability and enabling constant cutting without eccentricity. . Therefore, losses due to defects in the electrode sheet 2 are minimized, quality stability is improved, and cost reduction due to cutting is simultaneously achieved.

The first and second guide members 310 and 320 and the third and fourth guide members 410 and 420 are formed with the same diameter, so that when the actuator 200 is operated, the upper cutter 500 is simultaneously lowered or raised. You can do it.

A first fixing member 10 coupled to the first and second guide members 310 and 320 in the axial direction of the first and second guide members 310 and 320 at the top of the upper cutter 500 is coupled to the first and second guide members 310 and 320.

And the second fixing member 12 is coupled perpendicularly to the first fixing member 10 on the radial outer side. In this case, the first and second guide members 310 and 320 remain fixed at two positions in both the axial and radial directions and are thus stably fixed.

A third fixing member 20 coupled to the third and fourth guide members 410 and 420 in the axial direction of the upper cutter 500 is coupled to the third and fourth guide members 410 and 420.

And the fourth fixing member 22 is coupled perpendicularly to the third fixing member 20 on the radial outer side. In this case, the third and fourth guide members 410 and 420 remain fixed at two positions in both the axial and radial directions and are thus stably fixed.

A first guide bush (G1) is inserted into the first and second guide members 310 and 320 in the axial direction. As an example, the first guide bush (G1) is a ball bush equipped with a ball bearing, but it may also be changed to another configuration that ensures stable movement of the first and second guide members 310 and 320.

A second guide bush (G2) is inserted in the axial direction into the third and fourth guide members 410 and 420 according to this embodiment. As an example, the second guide bush (G2) is a ball bush equipped with a ball bearing, but it may also be changed to another configuration that ensures stable movement of the third and fourth guide members (410, 420).

The main frame 100 is provided with a sensor bracket 900, one end of which extends outward to a predetermined length after being coupled, and the other end of which is bent vertically toward the upper cutter 500.

The sensor bracket 900 is configured to have a ┛ shape based on the state in which it is installed on the main frame 100, but it may also be changed to another shape. That is, the shape viewed from the side of the main frame 100 and the upper cutter 500 can be changed in various ways and is not limited to the shape shown in the drawing.

The detection unit 700 according to this embodiment accurately detects the lowered position of the upper bracket 500 when the above-described upper bracket 500 is lowered toward the lower cutter 600 to cut the electrode sheet 2. Equipped for recognition.

In this case, the detection unit 700 is provided to accurately detect the position where the upper cutter 500 is lowered toward the lower cutter 600 to a position where they are moved relative to each other. The detection unit 700 is configured in conjunction with a control unit (not shown).

In this case, the control unit determines through the detection unit 700 that the upper cutter 500 has been lowered toward the lower cutter 600 to the exact cutting position of the electrode sheet 2 and recognizes that cutting is taking place normally.

The detection unit 700 includes a first detection unit 710 for detecting a position where the upper cutter 500 is lowered toward the lower cutter 600 in the vertical direction inside the sensor bracket 900, and the first detection unit 710. 1 It is located above the detection unit 710 and includes a second detection unit 720 for detecting a position in which the upper cutter 500 is spaced apart from the lower cutter 600 and raised upward.

It is also fixed to the support bracket 800 facing the sensor bracket 900, and is positioned on the front of the first detection unit 710 or the second detection unit 720 as the upper cutter 500 descends or rises. Includes a marker 730 to be located.

The first and second detection units 710 and 720 use proximity sensors, and the proximity sensor detects the position of the marker 730 moving with the upper cutter 500, generates magnetic force, and transmits a detection signal to the control unit. Thus, the movement state of the upper cutter 500 can be accurately detected.

The first detection unit 710 is installed facing the main frame 100 and the upper cutter 500 as shown in the drawing, and detects the position by generating electromagnetic force when the marker 730 is positioned in the front. I do it.

For example, when the marker 730 is positioned facing the first detection unit 710, the separation distance is maintained within 3 mm, so it can be advantageous in determining the exact movement state of the upper cutter 500.

The second detection unit 720 is spaced above the first detection unit 710 and is disposed at the position shown in the drawing to detect the movement of the upper cutter 500.

The marker 730 includes a first extension portion 732 extending from the front to the rear of the main frame 100 in the width direction of the support bracket 800 when viewed from the top, and the first extension portion ( 732) and includes a second extension portion 734 bent toward the sensing unit 700.

The second extension part 734 is bent as shown in the drawing to improve the accurate detection performance of the first detection unit 710 or the second detection unit 720 according to the movement of the upper cutter 500.

In this case, the first detection unit 710 or the second detection unit 720 can accurately detect the movement of the upper cutter 500 by the second extension part 734.

Referring to the attached FIG. 5, the first guide member 310 according to this embodiment may be formed to have a relatively larger diameter than the second guide member 320.

Additionally, it may be possible for the second guide member 320 to have a larger diameter than the first guide member 310. In this way, when the first and second guide members 310 and 320 have different diameters, the upper cutter 500 is cut by either the first or second guide member 310 or 320 with a relatively increased diameter. The coupling force and support force are increased, allowing for more stable ascent or descent.

In this embodiment, the above-described third and fourth guide members 410 and 420 are all formed with the same diameter, so that the upper cutter 500 can be lowered or raised simultaneously when the actuator 200 is operated.

Referring to the attached FIG. 6, the fourth guide member 420 according to this embodiment may be formed to have a relatively larger diameter than the third guide member 410.

Additionally, it may be possible for the third guide member 410 to have a larger diameter than the second guide member 420. In this way, when the third and fourth guide members 410 and 420 have different diameters, the upper cutter 500 is cut by one of the third or fourth guide members 410 and 420 with relatively increased diameters. The coupling force and support force are increased, allowing for more stable ascent or descent.

Therefore, when the upper cutter 500 is lowered from the right position in the drawing toward the lower cutter 600, it can be moved while maintaining a horizontal state at the same height as the left side, thereby improving the cutting stability for the electrode sheet 2.

Above, an embodiment of the present invention has been described, but those skilled in the art can add, change, delete or add components without departing from the spirit of the present invention as set forth in the patent claims. The present invention may be modified and changed in various ways, and this will also be included within the scope of rights of the present invention.

100: main frame
200: actuator
2: Electrode sheet
300: first guide part
310, 320: 1st and 2nd guide members
400: second guide part
410, 420: 3rd and 4th guide members
500: upper cutter
600: Lower cutter
700: Sensing unit
800: Support bracket

Claims (5)

a main frame extended to a predetermined length;
an actuator coupled to one side of the main frame;
a first guide portion provided on one side of the main frame adjacent to the actuator;
a second guide part spaced apart from the actuator and located on the other side of the main frame;
an upper cutter coupled to the actuator and located on the upper side of the main frame, maintained in a horizontal state by the first and second guide parts and moved upward or downward according to the operation of the actuator;
a lower cutter installed on the front of the main frame and located below the upper cutter; and
and a detection unit provided on the other side of the main frame to detect whether the upper cutter has actually moved toward the lower cutter.
The upper cutter is provided with a support bracket that maintains the coupled state at one side and a portion of the other side in the longitudinal direction of the lower surface, and the first guide portion is provided on the left side with respect to the actuator, one end is fixed to the support bracket, and the other end is It includes a first guide member inserted into the inside of the main frame, a second guide member provided on the right side of the actuator, one end fixed to the support bracket, and the other end inserted into the inside of the main frame,
Together with the first guide part, the second guide part includes a third guide member whose one end is fixed to the support bracket and whose other end is inserted into the inside of the main frame, and is provided on one side of the third guide member, One end is fixed to the support bracket, and the other end includes a fourth guide member inserted into the inside of the main frame,
The first guide part is positioned as a pair of the first and second guide members on both left and right sides with respect to the actuator, and the second guide part is made up of a pair of the third and fourth guide members,
A first fixing member is coupled to the first and second guide members in the axial direction of the first and second guide members at the top of the upper cutter, and a second fixing member is coupled perpendicular to the first fixing member in the radial direction outside. ,
A third fixing member is coupled to the third and fourth guide members in the axial direction of the third and fourth guide members at the top of the upper cutter, and a fourth fixing member is coupled perpendicular to the third fixing member on the radial outer side. ,
A cutting device for an electrode sheet, characterized in that a first guide bush is coupled to the first and second guide members in the axial direction, and a second guide bush is coupled to the third and fourth guide members in the axial direction. delete delete According to claim 1,
The main frame is provided with a sensor bracket, one end of which extends outward to a predetermined length after being coupled, and the other end of which is bent vertically toward the upper cutter,
The detection unit includes a first detection unit for detecting a position at which the upper cutter is lowered toward the lower cutter in the longitudinal direction inside the sensor bracket;
a second detection unit located above the first detection unit and configured to detect a position in which the upper cutter is spaced apart from the lower cutter and raised upward;
A cutting device for an electrode sheet including a marker fixed to a support bracket facing the sensor bracket and positioned on the front of the first or second sensing unit as the upper cutter descends or rises. According to clause 4,
The marker includes: a first extension extending from the front to the back of the main frame in the width direction of the support bracket when viewed from the top;
A cutting device for an electrode sheet including a second extension portion bent from the first extension portion toward the sensing portion.

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