KR102217446B1 - Thickness measuring apparatus of electrode for rechargeable battery - Google Patents

Abstract

The apparatus for measuring thickness of an electrode for a secondary battery according to the present invention moves in the X-axis direction in a state in which an end is in contact with a mounting plate on which an electrode is mounted and a surface of an electrode placed on the mounting plate, and the height of the electrode It includes a thickness measuring device for measuring the thickness of the electrode while the height changes according to the change, and a sliding portion for moving the thickness measuring device in the X axis.

Description

Thickness measurement device for secondary battery electrode {THICKNESS MEASURING APPARATUS OF ELECTRODE FOR RECHARGEABLE BATTERY}

The present invention relates to an apparatus for measuring thickness of an electrode for a secondary battery.

Unlike primary batteries, secondary batteries can be recharged, and due to their small size and large capacity, many research and developments have been made in recent years. As technology development and demand for mobile devices increase, the demand for secondary batteries as an energy source is rapidly increasing.

Secondary batteries are classified into coin-type batteries, cylindrical batteries, prismatic batteries, and pouch-type batteries according to the shape of the battery case. In a secondary battery, an electrode assembly mounted inside a battery case is a power plant capable of charging and discharging having a stacked structure of electrodes and separators.

The electrode assembly is a jelly-roll type in which a separator is wound between the positive electrode and the negative electrode in the form of a sheet coated with an active material, and a stack type in which a plurality of positive and negative electrodes are sequentially stacked with a separator interposed therebetween. , And stacked unit cells may be roughly classified into a stack/folding type wound with a long-length separation film.

Recently, a pouch-type battery having a structure in which a stack-type or stack/folding-type electrode assembly is embedded in a pouch-type battery case of an aluminum laminate sheet has been attracting a lot of interest for reasons such as low manufacturing cost, small weight, and easy shape transformation. Also, its usage is gradually increasing.

In most secondary batteries including pouch-type batteries, it is necessary to make the thickness of the electrode constant. Accordingly, devices for measuring the thickness of an electrode for a secondary battery are being studied in order to check the thickness of the electrode.

Korean Patent Application Publication No. 10-2014-0015647

One aspect of the present invention is to provide an apparatus for measuring thickness of an electrode for a secondary battery that is moved in one direction and capable of measuring the thickness of a continuous electrode.

Another aspect of the present invention is to provide an apparatus for measuring thickness of an electrode for a secondary battery, which is provided to be movable in all of the X-axis, Y-axis and Z-axis to measure the thickness of all portions of the electrode.

The apparatus for measuring thickness of an electrode for a secondary battery according to an embodiment of the present invention moves in the X-axis direction in a state in which an end is in contact with a mounting plate on which the electrode is mounted and a surface of the electrode placed on the mounting plate, and the It may include a thickness measuring device for measuring the thickness of the electrode while the height is changed according to the change in height of the electrode, and a sliding portion for moving the thickness measuring device in the X axis.

According to the present invention, it is possible to continuously measure the thickness of the electrode while moving the thickness measuring device in one direction.

In addition, according to the present invention, it is possible to measure the thickness of the electrode by moving the thickness measuring device in the X-axis, Y-axis and Z-axis, so that the thickness of all portions of the electrode or any selected portion can be accurately measured.

In addition, according to the present invention, the end of the thickness measuring device is formed in a round shape so that it moves along the surface of the electrode to measure the thickness of the electrode, and the electrode surface may not be damaged.

1 is a perspective view showing an apparatus for measuring thickness of an electrode for a secondary battery according to an embodiment of the present invention.
FIG. 2 is a perspective view exemplarily showing a state in which the thickness gauge is moved in the X-axis in the apparatus for measuring thickness of an electrode for a secondary battery according to an embodiment of the present invention.
3 is a perspective view illustrating an exemplary state in which the height of an end portion changes along the surface of the electrode when the thickness gauge moves in the X-axis in the apparatus for measuring thickness of an electrode for a secondary battery according to an embodiment of the present invention.
4 is a cross-sectional view illustrating a main part of a thickness measuring device in an apparatus for measuring a thickness of an electrode for a secondary battery according to an embodiment of the present invention.
5 is a perspective view showing a support in the apparatus for measuring thickness of an electrode for a secondary battery according to an embodiment of the present invention.
6 is a cross-sectional view taken along line A-A' in FIG. 5.
7 is a perspective view showing a state in which a thickness measuring device is fixed to a clamp of a support part in a thickness measuring apparatus for a secondary battery electrode according to an embodiment of the present invention.
8 is a perspective view showing an apparatus for measuring thickness of an electrode for a secondary battery according to another embodiment of the present invention.

Objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments associated with the accompanying drawings. In adding reference numerals to elements of each drawing in the present specification, it should be noted that, even though they are indicated on different drawings, only the same elements are to have the same number as possible. In addition, the present invention may be implemented in various forms and is not limited to the embodiments described herein. In addition, in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a perspective view showing an apparatus for measuring thickness of an electrode for a secondary battery according to an embodiment of the present invention.

Referring to FIG. 1, the apparatus 100 for measuring the thickness of an electrode for a secondary battery according to an embodiment of the present invention measures the thickness of the plate 110 on which the electrode 10 is mounted, and the electrode 10 It includes a thickness measuring device 120 and a sliding portion (M) for moving the thickness measuring device 120 in the X axis.

In addition, the apparatus 100 for measuring thickness of an electrode for a secondary battery according to an embodiment of the present invention may further include an X-axis guide rail 140 extending in the X-axis direction.

Hereinafter, an apparatus for measuring thickness of an electrode for a secondary battery according to an embodiment of the present invention will be described in more detail with reference to FIGS. 1 to 7.

Referring to FIG. 1, the seating plate 110 provides a seating portion on which the electrode 10 is seated. In addition, the mounting plate 110 may have an upper side formed in a flat shape. In addition, the mounting plate 110 may include an insulating material.

2 is a perspective view exemplarily showing a state in which the thickness gauge is moved in the X-axis in the thickness measuring apparatus for a secondary battery electrode according to an embodiment of the present invention, and FIG. 3 is an electrode for a secondary battery according to an exemplary embodiment Is a perspective view showing an exemplary state in which the height of an end portion changes along the surface of an electrode when the thickness measuring device moves in the X-axis in the thickness measuring device of, and FIG. 4 is a thickness measuring device for an electrode for a secondary battery according to an embodiment of the present invention. Is a cross-sectional view showing the main part of the thickness measuring device as an example.

Referring to FIGS. 1 and 3, the thickness measuring device 120 may measure the height of the electrode 10 by contacting the end 122a with the surface 11 of the electrode 10 placed on the mounting plate 110. .

In addition, referring to FIGS. 2 and 3, the thickness measuring device 120 may measure the thickness of the electrode 10 while moving in the X-axis or Y-axis direction and changing the height according to the change in the height of the electrode 10. . At this time, in the thickness measuring device 120, the height of the end portion 122a contacting the surface 11 of the electrode 10 may vary according to the height of the surface 11 of the electrode 10. Accordingly, the thickness measurer 120 may detect the height of the surface 11 of the electrode 10 by detecting the height of the end 122a.

In addition, referring to FIGS. 1 and 4, the thickness measuring device 120 includes a body 121, a measuring rod 122 accommodated in the main body 121 so as to be movable up and down, and a measuring rod 122 elastically. It may include a sensor (Sensor) 124 that detects the displacement of the elastic member 123 and the measuring rod 122 supported by the.

The main body 121 may include, for example, a measuring rod 122 and a receiving portion for accommodating the elastic member 123 and the sensor 124. In addition, the receiving portion of the main body 121 is formed to be open downward so that the end portion 122a of the measuring rod 122 may protrude downward. Further, the main body 121 may have an upper jaw 121a to which the upper end of the elastic member 123 accommodated in the receiving portion is in close contact with each other.

The elastic member 123 may elastically support the measuring rod 122 so that the measuring rod 122 can maintain a predetermined height. In this case, the elastic member 123 may be formed of, for example, a coil spring mounted along the outer circumferential surface of the measuring rod 122.

The measuring rod 122 has an end 122a in contact with the surface of the electrode 10 and may move up and down the interior of the receiving portion of the main body 121 according to the height of the surface of the electrode 10.

In addition, the measuring rod 122 may have a seating protrusion 122b so that the lower end of the elastic member 123 may be seated. At this time, when the measuring rod 122 moves up and down along the interior of the receiving portion, the elastic member 123 may be contracted by the seating protrusion 122b. Here, the protruding length (a) protruding from the end of the main body 121 when the end 122a of the measuring rod 122 is located in a section where the surface height of the electrode 10 is low is the high surface height of the electrode 10 It may protrude longer than the protrusion length (b) when positioned in the section.

Meanwhile, the measuring rod 122 may have a lower end 122a formed in a round shape. In this case, the measuring rod 122 may have, for example, a lower end 122a formed in a hemispherical shape. Accordingly, it is in contact with the surface of the electrode 10 and the electrode may not be damaged by the measuring rod 122 when it is moved.

Referring to FIG. 1, the X-axis guide rail 140 may extend from the side of the electrode 10 in the X-axis direction. In addition, the X-axis guide rail 140 may be seated on the seating plate 110. At this time, the X-axis guide rail 140 may be provided in a pair, for example, and may be fixed to the seating plate 110 by being spaced apart at a predetermined interval so that the electrode 10 is positioned therebetween.

The sliding part M may move the thickness gauge 120 in the X-axis while moving along the X-axis guide rail 140.

In addition, the sliding part (M) is coupled to the X-axis sliding member 150, which is movably coupled to the X-axis guide rail 140 in the X-axis direction, and the upper surface of the X-axis sliding member 150, and is coupled to the Y-axis direction. It is installed on the extended Y-axis guide rail 160 and the Y-axis sliding member 170 and Y-axis sliding member 170 movably coupled to the Y-axis guide rail 160, and the thickness measuring device 120 It includes a supporting portion 180 to support.

5 is a perspective view showing a support part in the apparatus for measuring thickness of an electrode for a secondary battery according to an embodiment of the present invention, FIG. 6 is a cross-sectional view taken along line A-A' in FIG. 5, and FIG. It is a perspective view showing a state in which the thickness measuring device 120 is fixed to the clamp of the support in the apparatus for measuring the thickness of an electrode for a secondary battery according to the embodiment.

1, 5, and 6, the support 180 includes a support 181 fixedly installed on the Y-axis sliding member 170, and a Z that is movably coupled to the support 181 in the Z-axis direction. It includes a shaft slide member (182). At this time, the thickness measuring device 120 may be coupled to the Z-axis sliding member 182.

The support 181 has a guide protrusion 181a extending along the vertical direction, and the Z-axis sliding member 182 is formed with a coupling groove 182a coupled to the guide protrusion 181a to guide the guide protrusion 181a It can be moved vertically while receiving. In this case, the guide protrusion 181a may be formed to have a wider width in the direction of the Z-axis sliding member 182, and the coupling groove 182a may be formed as a groove having a shape corresponding to the guide protrusion 181a.

In addition, the support unit 180 may further include an adjustment screw 183 for fixing the Z-axis sliding member 182 to the support 181. At this time, the Z-axis sliding member 182 may be formed by passing through a through hole 182b to which the adjustment screw 183 is coupled in the direction of the guide protrusion 181a of the support 181. Here, the adjustment screw 183 may be screwed into the through hole (182b) by forming a screw portion (183a) on the outer peripheral surface. Accordingly, the Z-axis sliding member 182 moves in the Z-axis direction and then rotates the adjustment screw 183 so that the end of the adjustment screw 183 presses the guide protrusion 181a, and the Z-axis sliding member 182 is It can be fixed to the support 181. As a result, it is possible to fix the position of the thickness measuring device 120 supported by the support part 180 at an arbitrary height.

Meanwhile, referring to FIGS. 1, 5 and 7, the support 180 may further include, for example, a clamp for fixing the thickness measuring device 120 to the Z-axis sliding member 182. Here, the clamp includes a winding portion 184 surrounding one side of the side of the thickness measuring device 120 and an adjustment screw 185 that is screwed to both ends of the winding portion 184 to adjust the distance between both ends of the winding portion 184 I can. At this time, screw holes having threaded portions formed on the inner circumferential surface are formed at both ends of the winding portion 184, and adjustment screws 185 having threaded portions formed on the outer circumferential surface may be screwed to both ends of the winding portion 184. Here, one side of the winding portion 184 may be fixed to the Z-axis sliding member 182.

In addition, the clamp may further include a nut 186 having a threaded portion formed on an inner circumferential surface coupled to the adjusting screw 185. At this time, the nut 186 is coupled to the screw holes formed at both ends of the winding portion 184 and may be screwed to the outer peripheral surface of the end of the adjustment screw 185 passing through the screw hole.

8 is a perspective view showing an apparatus for measuring thickness of an electrode for a secondary battery according to another embodiment of the present invention.

Referring to FIG. 8, an apparatus 200 for measuring thickness of an electrode for a secondary battery according to another embodiment of the present invention includes a seating plate 110 on which the electrode 10 is mounted, and a thickness measuring device for measuring the thickness of the electrode 10. It may include 120, a slide portion M for moving the thickness measuring device 120 in the X-axis, and an X-axis guide rail 240 extending in the X-axis direction. At this time, the apparatus 200 for measuring the thickness of an electrode for a secondary battery according to another embodiment of the present invention includes an operation unit 291 for calculating the thickness of the electrode 10 and a display unit 292 for displaying the calculated thickness of the electrode 10. ) May be further included.

Hereinafter, an apparatus for measuring a thickness of an electrode for a secondary battery according to another embodiment of the present invention will be described in detail with reference to FIG. 8.

Referring to FIG. 8, when comparing the thickness measuring apparatus 200 for a secondary battery according to another embodiment of the present invention with the apparatus 100 for measuring the thickness of an electrode for a secondary battery according to the above-described embodiment, an operation unit 291 And there is a difference that further includes the display unit 292. Accordingly, in the present embodiment, content overlapping with the embodiment will be briefly described, and the differences will be mainly described.

In more detail, in the apparatus 200 for measuring the thickness of an electrode for a secondary battery according to another embodiment of the present invention, the calculating part 291 is electrically connected to the thickness measuring device 120, and the upper portion of the end portion 122a of the thickness measuring device 120, The thickness of the electrode 10 may be calculated by receiving the lower movement value. That is, the calculation unit 291 is moved along the surface 11 of the electrode 10 and the end 122a of the measuring rod 122 of the thickness measuring device 120 moves up and down when the measuring rod 122 moves. The thickness of the electrode 10 can be calculated by receiving a detection value from the sensor 124 that has detected the amount of displacement (see FIGS. 3 and 4).

The display unit 292 may receive the calculated thickness value of the electrode 10 from the operation unit 291 and perform a display.

Here, the display unit 292 may be formed of, for example, a Liquid Crystal Display (LCD) monitor or a Light Emitting Diode (LED) monitor.

In the apparatus 200 for measuring the thickness of an electrode for a secondary battery according to another embodiment of the present invention, the sliding part M includes an X-axis sliding member 250 that is movably coupled to the X-axis guide rail 240 in the X-axis direction. , Y-axis sliding member 270 and Y coupled to the upper surface of the X-axis sliding member 250 and movably coupled to the Y-axis guide rail 260 extending in the Y-axis direction, and the Y-axis guide rail 260 It is installed on the shaft sliding member 270, and includes a support portion 180 for supporting the thickness measuring device 120.

The X-axis slide member 250 may have a guide groove 251 coupled to the X-axis guide rail 240 so as to be movable along the X-axis guide rail 240. Here, the X-axis guide groove 241 is formed along the X-axis guide rail 240 toward the side of the X-axis guide rail 240, and the X-axis guide protrusion 252 coupled to the X-axis guide groove 241 is It may be formed on the X-axis sliding member 250. At this time, the X-axis guide protrusion 252 may protrude in a shape corresponding to the X-axis guide groove 241 of the X-axis guide rail 240 in the guide groove 251 of the X-axis slide member 250.

The Y-axis slide member 270 may have a guide groove 271 coupled to the Y-axis guide rail 260 to be movable along the Y-axis guide rail 260 on the lower side. Here, the Y-axis guide groove 261 is formed along the Y-axis guide rail 260 to the side of the Y-axis guide rail 260, and the Y-axis guide protrusion 272 coupled to the Y-axis guide groove 261 is It may be formed on the Y-axis sliding member 270. At this time, the Y-axis guide protrusion 272 may be formed in a shape corresponding to the Y-axis guide groove 261 of the Y-axis guide rail 260 in the guide groove 271 of the Y-axis slide member 270.

Although the present invention has been described in detail through specific examples, this is for describing the present invention in detail, and the apparatus for measuring thickness of an electrode for a secondary battery according to the present invention is not limited thereto. It will be said that various implementations are possible by those of ordinary skill in the art within the technical idea of the present invention.

In addition, the specific scope of protection of the invention will be made clear by the appended claims.

10: electrode
11: surface
100,200: thickness measuring device
110: seat plate
120: thickness meter
121: main body
121a: upper jaw
122: measuring rod
122a: end
122b: seating jaw
123: elastic member
124: sensor
140,240: X-axis guide rail
150,250: X-axis sliding member
160,260: Y-axis guide rail
170,270: Y-axis sliding member
180: support
181: support
181a: guide protrusion
182: Z-axis sliding member
182a: coupling groove
182b: through hole
183: adjusting screw
183a: threaded portion
184: winding
185: adjusting screw
186: nut
241: X axis guide groove
251: guide groove
252: X-axis guide projection
261: Y axis guide groove
271: Information Home
272: Y-axis guide projection
291: operation unit
292: display unit
M: slide

Claims (12)

A seating plate on which an electrode is seated;
A thickness measuring device that moves in the X-axis direction with an end in contact with the surface of the electrode placed on the mounting plate, and measures the thickness of the electrode while its height changes according to a change in height of the electrode; And
Includes; a sliding portion for moving the thickness gauge in the X axis,
Further comprising an X-axis guide rail extending in the X-axis direction from the side of the electrode, and the sliding part moves the thickness gauge to the X-axis while moving along the X-axis guide rail,
The thickness gauge
A main body having an open lower portion;
A measuring rod accommodated in a receiving portion of the main body to move up and down, and an end portion protruding from a lower portion of the main body;
An elastic member elastically supporting the measuring rod; And
As the end of the measuring rod is in contact with the surface of the electrode and moved up and down, a sensor for detecting a displacement of the measuring rod that is moved,
An end portion of the thickness measuring device is formed in a round shape, and the end portion of the measuring rod is formed in a hemispherical shape. delete The method according to claim 1,
The slide portion,
An X-axis sliding member movably coupled to the X-axis guide rail in the X-axis direction;
A Y-axis guide rail coupled to an upper surface of the X-axis sliding member and extending in the Y-axis direction;
A Y-axis sliding member movably coupled to the Y-axis guide rail; And
An apparatus for measuring thickness of an electrode for a secondary battery, which is installed on the Y-axis sliding member and includes a support portion supporting the thickness measuring device. The method of claim 3,
The support part,
A support fixedly installed on the Y-axis sliding member; And
Including; a Z-axis sliding member that is movably coupled to the support in the Z-axis direction,
The thickness measuring device for a secondary battery electrode, characterized in that coupled to the Z-axis sliding member. The method of claim 4,
The support part
A thickness measuring apparatus for a secondary battery electrode further comprising a clamp for fixing the thickness measuring device to the Z-axis sliding member. The method of claim 5,
The clamp is
A winding portion surrounding one side of the side surface of the thickness measuring device and having screw holes formed at both ends; And
A thickness measuring apparatus for a secondary battery electrode comprising a adjusting screw that is screwed into the screw holes formed at both ends of the winding unit to adjust the mutual spacing of both ends of the winding unit to fix the thickness measuring device. The method according to claim 1,
The mounting plate is a thickness measuring device for a secondary battery electrode comprising an insulating material. delete delete delete The method according to claim 1,
The thickness measuring apparatus for a secondary battery electrode, which is electrically connected to the thickness measuring device, and further comprising a calculating unit configured to calculate the thickness of the electrode by receiving an upper and lower moving value of an end of the thickness measuring device. The method of claim 11,
The apparatus for measuring thickness of an electrode for a secondary battery further comprising a display unit receiving and displaying the calculated value of the thickness of the electrode from the calculating unit.

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