KR20230122984A - Jig assembly for electrode tab and welding apparatus for electrode tab including the same - Google Patents

Abstract

The present invention relates to a jig assembly for an electrode tab, including: a first pressing member and a second pressing member that press electrode tabs provided in a plurality of electrode units to bring the electrode tabs together; and an adjustment jig that adjusts pressing force applied to the electrode tabs by separating the first pressing member and the second pressing member from each other to maintain a set distance or more.

Description

Jig assembly for electrode tab and welding device for electrode tab including the same {JIG ASSEMBLY FOR ELECTRODE TAB AND WELDING APPARATUS FOR ELECTRODE TAB INCLUDING THE SAME}

The present invention relates to a jig assembly for electrode tabs that gathers electrode tabs and a welding device for electrode tabs including the jig assembly.

In general, a secondary battery refers to a battery that can be charged and discharged, unlike a primary battery that cannot be charged, and such a secondary battery is widely used in phones, notebook computers, camcorders, and electric vehicles.

The secondary battery described above is classified into a can-type secondary battery in which the electrode assembly is embedded in a metal can and a pouch-type secondary battery in which the electrode assembly is embedded in a pouch. The can-type secondary battery includes an electrode assembly, a can accommodating the electrode assembly, and a cap assembly mounted on an opening of the can. The pouch-type secondary battery includes an electrode assembly, a pouch accommodating the electrode assembly, and an electrode lead connected to the electrode assembly and drawn out of the pouch.

The electrode assembly has a structure in which a plurality of electrodes and a plurality of separators are alternately stacked, and electrode tabs are provided at ends of the electrodes. That is, electrode tabs are provided at ends of the plurality of electrodes. In addition, the electrode tabs are combined with the electrode lead in a bundled state.

Meanwhile, the plurality of electrodes may be an anode and a cathode. That is, the electrode assembly has a structure in which an anode and a cathode are alternately disposed with a separator interposed therebetween.

Here, the electrode tabs and the electrode lead are coupled through a welding device, and the welding device includes a guide jig for gathering the electrode tabs together, and a horn and anvil for welding the electrode tabs and the electrode lead. The guide jig includes first and second pressing members that press the upper and lower portions of the electrode tabs to gather the electrode tabs together.

However, the guide jig has a problem in that electrode tabs are damaged or deformed by the pressing force of the first and second pressing members.

Patent Publication No. 10-2020-0105272.

According to the present invention, the pressing force applied to the electrode tabs can be adjusted by separating the first and second pressing members so as to be maintained at a predetermined distance or more, and as a result, damage and deformation of the electrode tabs can be prevented. In particular, it is an object of the present invention to provide a jig assembly for electrode tabs and a welding device for electrode tabs including the same, which can increase work efficiency by easily adjusting the distance between the first and second pressing members.

The present invention is a jig assembly for electrode tabs, comprising: a first pressing member and a second pressing member for pressing electrode tabs provided in a plurality of electrode units to gather the electrode tabs together; and an adjusting jig that adjusts the pressing force applied to the electrode tabs by separating the first pressing member and the second pressing member so as to maintain a predetermined interval or more.

The adjusting jig may include an adjusting unit provided between the first pressing member and the second pressing member and spaced apart so that the first pressing member and the second pressing member are maintained at a predetermined distance or more.

The first pressing member and the second pressing member are provided to extend elongately in the overall width direction of the electrode tabs, and the control unit is configured to connect the ends of the first pressing member and the second pressing member to the outside of the electrode tabs. It may be provided between the ends.

The pressing surfaces of the first pressing member and the second pressing member for pressing the electrode tabs may be provided in a horizontal plane, and the control unit may have a square block shape to be in close contact with the pressing surfaces of the first pressing member and the second pressing member. there is.

The set interval is the thickness of the control unit, and the thickness of the control unit may have a thickness smaller than the thickness of the electrode tabs that are bundled together.

The adjusting jig may further include a fixing part provided at both ends of one surface of the adjusting part located in the entire length direction of the electrode tabs and supported on both surfaces of the first pressing member, respectively.

The fixing part and the adjusting part may be integrally provided.

One of the fixing parts is integrally provided at one end of the adjusting part, and the other fixing part is coupled to the other end of the adjusting part and is slidably coupled in a direction toward the first pressing member. can

A guide groove extending in a direction toward the first pressing member may be formed at one end of the adjusting unit, and a guide protrusion slidably coupled to the guide groove may be formed at the other fixing part.

The adjustment jig may further include a support provided at one end of the other surface of the adjustment unit located in the overall length direction of the electrode tabs and supported on a surface of the second pressing member.

The support part and the control part may be integrally provided.

A protective film having elasticity may be further included on a surface of the control unit on which the first pressing member and the second pressing member are supported.

The first pressing member and the second pressing member may be made of a metal material, and one surface of the control unit may have magnetism so as to be attached to the first pressing member.

The jig assembly for the electrode tab measures the distance between the first pressing member and the second pressing member spaced apart by the control unit, and determines that the measured distance is normal when it is located within the range of the input set distance, and sets the An inspection member that is determined to be defective when positioned outside the range of the interval may be further included.

Meanwhile, the welding apparatus for an electrode tab of the present invention may include a jig assembly for an electrode tab.

The jig assembly for electrode tabs of the present invention includes an adjusting jig, so that the first and second pressing members can be spaced apart so as to be maintained at a set interval or more, and accordingly, the pressing force applied to the electrode tabs can be adjusted, and as a result, the electrode tabs Damage and deformation can be prevented. In particular, since the distance between the first and second pressing members can be easily adjusted, work efficiency can be increased.

1 is an exploded perspective view showing a jig assembly for an electrode tab according to a first embodiment of the present invention;
2 is an assembled perspective view showing a jig assembly for an electrode tab according to a first embodiment of the present invention.
Figure 3 is a front view of Figure 2;
Figure 4 is a side view of Figure 2;
5 is a side view showing a welding device for an electrode tab according to a second embodiment of the present invention.
6 is a perspective view showing a jig assembly for an electrode tab according to a third embodiment of the present invention;
7 is a side view showing a welding device for an electrode tab according to a fourth embodiment of the present invention.
8 is a side view showing a welding device for an electrode tab according to a fifth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

[Secondary battery]

A secondary battery includes an electrode assembly and a pouch accommodating the electrode assembly. The electrode assembly has a structure in which a plurality of electrodes and a plurality of separators are alternately disposed. The pouch includes an accommodating portion accommodating the electrode assembly and a sealing portion sealing the accommodating portion.

Meanwhile, the plurality of electrodes may be positive and negative electrodes. That is, the electrode assembly has a structure in which an anode and a cathode are alternately disposed with a separator interposed therebetween.

Referring to FIG. 1, an electrode tab is provided at an end of the electrode. That is, a plurality of electrode tabs (hereinafter referred to as electrode tabs) 1 are provided at ends of the plurality of electrodes. Also, the electrode leads 2 are coupled to the electrode tabs 1 .

Here, in order to combine the electrode tabs and the electrode lead 2, the electrode tabs 1 must be gathered together, and at this time, the jig assembly 10 for electrode tabs according to the first embodiment of the present invention is used.

[Jig assembly for electrode tab according to the first embodiment of the present invention]

1 is an exploded perspective view showing a jig assembly for an electrode tab according to a first embodiment of the present invention, FIG. 2 is an assembled perspective view showing a jig assembly for an electrode tab according to a first embodiment of the present invention, and FIG. 2 is a front view, and FIG. 4 is a side view of FIG. 2 .

As shown in FIGS. 1 to 4 , the jig assembly 10 for electrode tabs according to the first embodiment of the present invention is for gathering electrode tabs 1 provided at ends of a plurality of electrodes.

That is, the jig assembly 10 for an electrode tab according to the first embodiment of the present invention includes a first pressing member 100, a second pressing member 200, and an adjusting jig 300.

The first pressing member and the second pressing member

The first pressing member 100 and the second pressing member 200 press the electrode tabs 1 to gather the electrode tabs 1 together. That is, referring to FIG. 1 , the first pressing member 100 and the second pressing member 200 are symmetrically provided at the uppermost and lowermost ends of the electrode tabs 1, respectively, and the electrode tabs 1 are bundled It has a structure that pressurizes the crabs to gather.

For example, the first pressing member 100 is disposed at the lowermost end of the electrode tabs 1, and the second pressing member 200 is disposed at the uppermost end of the electrode tabs 1 in a hydraulic device (not shown). It is disposed to be movable in the direction of the first pressing member 100 by the. Accordingly, the electrode tabs 1 are gathered by the first and second pressing members 100 and 200 .

Meanwhile, the pressing surface 110 of the first pressing member 100 and the pressing surface 210 of the second pressing member 200 that press the electrode tabs 1 may be provided in a horizontal plane to increase adhesion.

control jig

The adjusting jig 300 adjusts the pressing force applied to the electrode tabs 1 by separating the first pressing member 100 and the second pressing member 200 so as to maintain a predetermined interval or more. In other words, the adjustment jig may be spaced so that the distance between the first pressing member 100 and the second pressing member 200 is not reduced to less than a set interval.

For example, the adjusting jig 300 includes an adjusting unit 310 . The adjusting unit 310 is provided between the first pressing member 100 and the second pressing member 200 and supports the first pressing member 100 and the second pressing member 200 .

That is, the adjusting unit 310 is disposed between the pressing surface 110 of the first pressing member 100 and the pressing surface 210 of the second pressing member 200, and the first pressing member 100 and the second pressing member 200 can be adjusted to maintain a set interval or more. In other words, the control unit 310 may separate the first pressing member 100 and the second pressing member 200 so as to maintain a set distance or more, and accordingly, the first pressing member 100 and the second pressing member 200 may be spaced apart. The electrode tabs 1 pressed by the second pressing member 200 can be controlled so that they are not pressed below a set interval, and as a result, damage and deformation of the electrode tabs 1 can be prevented.

Meanwhile, the first pressing member 100 and the second pressing member 200 may be provided to elongate in the entire width direction of the electrode tabs 1 (left and right directions when viewed in FIG. 3 ). In addition, the adjusting unit 310 may be provided between an end of the first pressing member 100 and an end of the second pressing member 200 extending to the outside of the electrode tabs 1 . Accordingly, it is possible to prevent interference between the control unit 310 and the electrode tabs 1, and as a result, it is possible to prevent damage to the electrode tab part by the control unit 310. In particular, the control unit 310 may be provided between both ends of the first pressing member 100 and both ends of the second pressing member 200, and accordingly, the first pressing member 100 and the second pressing member ( 200) can be stably supported.

Meanwhile, the adjusting unit 310 may have a square block shape so that the pressing surfaces 210 of the first pressing member 100 and the second pressing member 200 come into close contact with each other. In particular, the control unit 310 may be made of the same material as that of the first pressing member 100 and the second pressing member 200 . Accordingly, it is possible to prevent the control unit 310 or the first pressing member 100 and the second pressing member 200 from being easily worn out.

Meanwhile, an adhesive layer may be further included between the adjusting unit and the first pressing member. Accordingly, adhesion between the control unit and the first pressing member may be increased. On the other hand, referring to the enlarged view of FIG. 4 on the pressing surface 110 of the first pressing member 100, a 'V' shaped coupling groove 111 may be formed in the longitudinal direction, and the control unit 310 ) may be formed with a 'V' shaped coupling protrusion 313 movably coupled along the coupling groove 111. This can prevent the fixing force and shaking of the control unit.

Meanwhile, the set interval may be the thickness of the control unit 310 . Also, the thickness of the controller 310 may be equal to or smaller than the thickness of the electrode tabs 1 united. Preferably, the thickness of the control unit has a thickness smaller than the thickness of the bundled electrode tabs. Accordingly, the electrode tabs 1 can be effectively pressed by the first pressing member 100 and the second pressing member 200 and the electrode tabs 1 can be gathered together.

Meanwhile, the adjusting jig 300 may further include a fixing part 320 . The fixing part 320 is located at both ends of one surface of the adjusting part 310 located in the lengthwise direction of the electrode tabs 1 (ie, the lengthwise direction of the electrode tab) (both ends of the lower surface of the adjusting part 310 when viewed in FIG. 1 ). ), respectively, and supported on both surfaces of the first pressing member 100, respectively. Accordingly, the adjusting unit 310 may be disposed not to move on the pressing surface 110 of the first pressing member 100 .

Meanwhile, the fixing unit 320 and the adjusting unit 310 may be integrally provided. That is, the integrated fixing part 320 and the adjusting part 310 may have a "c" shape. Accordingly, the ease of manufacture can be increased.

Meanwhile, the adjusting jig 300 may further include a support part 330 . The support part 330 is provided at one end of the other surface of the adjusting part 310 (rear end of the upper surface of the adjusting part 310 as seen in FIG. 1) located in the entire length direction of the electrode tabs 1, and the second pressing member ( 200) is supported. That is, the support part 330 guides the second pressing member 200 to be supported on the upper surface of the adjusting part 310 .

Meanwhile, the support unit 330 and the control unit 310 may be integrally provided. Accordingly, the ease of manufacture can be increased.

Therefore, the jig assembly 10 for electrode tabs according to the first embodiment of the present invention can adjust the pressing force applied to the electrode tabs 1 by including the adjusting jig 300, and as a result, damage to the electrode tabs 1 and deformation can be prevented. In particular, since the distance between the first and second pressing members 200 can be easily adjusted, work efficiency can be increased.

Meanwhile, the jig assembly 10 for an electrode tab according to the first embodiment of the present invention may further include an inspection member 400 .

Absence of inspection

Referring to FIG. 2 , the inspection member 400 is for measuring a distance between the first pressing member 100 and the second pressing member 200 . That is, the inspection member 400 measures the distance between the first pressure member 100 and the second pressure member 200 spaced apart by the control unit 310, and sets the measured distance to be input. If it is located within the range of the interval, it is determined to be normal, and if it is located outside the range of the set interval, it is determined to be defective.

On the other hand, the inspection member 400 includes an infrared camera 410 for measuring the distance between the first pressing member 100 and the second pressing member 200, and the first pressing member 410 in the image captured by the infrared camera 410. 1 includes an inspection unit 420 that measures the distance between the pressing member 100 and the second pressing member 200 and inspects whether the measured distance is within the range of the input set distance.

Therefore, the jig assembly 10 for an electrode tab according to the first embodiment of the present invention further includes an inspection member 400 so that the interval between the first pressing member 100 and the second pressing member 200 is a set interval. You can easily check if it has been reduced below.

Hereinafter, in describing other embodiments of the present invention, the same configuration numerals are used for the same configurations as those in the above-described embodiment, and overlapping descriptions are omitted.

[Welding device for electrode tab according to the second embodiment of the present invention]

5 is a side view showing a welding device for an electrode tab according to a second embodiment of the present invention.

A welding apparatus for an electrode tab according to a second embodiment of the present invention has a structure including the jig assembly for an electrode tab described above.

As an example, the welding apparatus for electrode tabs according to the second embodiment of the present invention, as shown in FIG. 5, is a jig assembly for electrode tabs that presses and gathers electrode tabs 1 provided at the ends of a plurality of electrodes, and electrodes. The anvil 20 supporting the lower surface of the welded portion where the tabs 1 and the electrode lead 2 overlap is disposed on the upper surface of the welded portion and the electrode tabs 1 are pressed together with the anvil 20, using ultrasonic waves to It includes a horn 30 for welding the tabs 1 and the electrode lead 2.

Meanwhile, the jig assembly for the electrode tab has the same configuration as the jig assembly for the electrode tab described in the first embodiment, and therefore, overlapping descriptions are omitted.

Therefore, the welding apparatus for electrode tabs according to the second embodiment of the present invention can stably weld the electrode tabs and the electrode leads 2 without damage or deformation of the electrode tabs 1 .

[Jig assembly for electrode tab according to the third embodiment of the present invention]

6 is a perspective view showing a jig assembly for an electrode tab according to a third embodiment of the present invention.

A jig assembly for an electrode tab according to a third embodiment of the present invention includes an adjusting jig 300, and the adjusting jig 300 is provided at both ends of the adjusting unit 310 and the lower surface of the adjusting unit 310, respectively It includes a fixing part 320.

Here, one fixing part 320 of the fixing part 320 is integrally provided at one end of the adjusting part 310, and the other fixing part 320 is the other side of the adjusting part 310. Doedoe is coupled to the end, coupled to be slidably movable in a direction toward the first pressing member (100).

For example, a guide groove 311 extending in a direction toward the first pressing member 100 is formed at one end of the adjusting part 310, and the guide groove 311 is formed in the other fixing part 320. A guide protrusion 321 is formed to be slidably coupled to 311. Accordingly, it is possible to adjust the distance between the fixing part 320 provided at both ends of the adjusting part 310 and the fixing part 320 . Meanwhile, the fixing unit having a fixed position may be fixed to the adjusting unit through a fixing means such as a bolt.

Therefore, the jig assembly for electrode tabs according to the third embodiment of the present invention can be used interchangeably with the first pressing member 100 having various thicknesses. In particular, the adjusting jig can be compressed to the first pressing member 100 by adjusting the distance between the fixing part 320 and the fixing part 320, and as a result, the adjusting jig 300 is the first pressing member 100. escape from it can be prevented.

[Jig assembly for electrode tab according to the fourth embodiment of the present invention]

7 is a perspective view showing a jig assembly for an electrode tab according to a fourth embodiment of the present invention.

As shown in FIG. 7 , a jig assembly for an electrode tab according to a fourth embodiment of the present invention includes the control unit 310 supporting the first pressing member 100 and the second pressing member 200 . .

Here, a protective film having elasticity is included on the surface of the control unit 310 on which the first pressing member 100 and the second pressing member 200 are supported. Meanwhile, the protective film may be made of a synthetic resin material.

Therefore, the welding apparatus for an electrode tab according to the fourth embodiment of the present invention prevents impact force and noise between the first pressing member 100 and the adjusting unit 310 or between the second pressing member 200 and the adjusting unit 310. and, in particular, the occurrence of abrasion can be remarkably prevented.

On the other hand, the thickness of the protective film has a thickness of 1 ~ 10㎛, it can be replaced every set time.

[Jig assembly for electrode tab according to the fifth embodiment of the present invention]

8 is a perspective view showing a jig assembly for an electrode tab according to a fifth embodiment of the present invention.

As shown in FIG. 8 , in the jig assembly for an electrode tab according to a fifth embodiment of the present invention, the first pressing member 100 and the second pressing member 200 are made of a metal material, and the control unit 310 ) has a magnetic force to be attached to the first pressing member 100. That is, one surface of the control unit 310 may be provided as a magnet surface 312 .

Therefore, in the welding apparatus for electrode tabs according to the fifth embodiment of the present invention, the adjusting unit 310 can be stably attached to and fixed to the first pressing member 100 without a separate member.

The scope of the present invention is indicated by the claims to be described later rather than the above detailed description, and various embodiments derived from the meaning and scope of the claims and equivalent concepts thereof are possible.

1: electrode tab
2: electrode lead
10: jig assembly for electrode tab
20: Anvil
30: horn
100: first pressing member
110: pressure surface
111: coupling groove
200: second pressing member
210: pressurized surface
300: control jig
310: control unit
311: guide groove
312: magnet side
313: coupling protrusion
320: fixing part
321: guide protrusion
330: support
400: inspection member

Claims (15)

a first pressing member and a second pressing member for pressing the electrode tabs provided in the plurality of electrode units to gather the electrode tabs together; and
A jig assembly for electrode tabs comprising a control jig that adjusts the pressing force applied to the electrode tabs by spacing the first pressing member and the second pressing member apart so as to be maintained at a predetermined interval or more. The method of claim 1,
The adjusting jig includes an adjusting unit provided between the first pressing member and the second pressing member and spaced apart so that the first pressing member and the second pressing member are maintained at a set interval or more. Jig assembly for electrode tabs. The method of claim 2,
The first pressing member and the second pressing member are provided to elongate in the entire width direction of the electrode tabs,
The adjusting unit is a jig assembly for electrode tabs provided between an end of the first pressing member and an end of the second pressing member extending to the outside of the electrode tabs. The method of claim 2,
The pressing surfaces of the first pressing member and the second pressing member pressing the electrode tabs are provided in a horizontal plane,
The jig assembly for an electrode tab having a square block shape so that the control unit is in close contact with the pressing surfaces of the first pressing member and the second pressing member. The method of claim 2,
The set interval is the thickness of the control unit,
The thickness of the control unit is a jig assembly for electrode tabs having a thickness smaller than the thickness of the agglomerated electrode tabs. The method of claim 2,
The adjusting jig further includes a fixing part provided at both ends of one surface of the adjusting part located in the entire length direction of the electrode tabs and supported on both surfaces of the first pressing member, respectively. The method of claim 6,
The jig assembly for the electrode tab, wherein the fixing part and the adjusting part are integrally provided. The method of claim 6,
One fixing part of the fixing part is integrally provided at one end of the adjusting part, and the other fixing part is coupled to the other end of the adjusting part and is slidably coupled in a direction toward the first pressing member. Jig assembly for electrode tabs. The method of claim 8,
At one end of the control unit, a guide groove extending in a direction toward the first pressing member is formed,
A jig assembly for an electrode tab in which a guide protrusion slidably coupled to the guide groove is formed in the other fixing part. The method of claim 2,
The jig assembly for electrode tabs, wherein the adjusting jig further includes a support portion provided at one end of the other surface of the adjusting portion located in the entire length direction of the electrode tabs and supported on a surface of the second pressing member. The method of claim 10,
The jig assembly for an electrode tab in which the support part and the control part are integrally provided. The method of claim 2,
A jig assembly for an electrode tab further comprising a protective film having elasticity on a surface of the control unit on which the first pressing member and the second pressing member are supported. The method of claim 2,
The first pressing member and the second pressing member are made of a metal material,
One surface of the control unit has a magnet so as to be attached to the first pressing member. The method of claim 2,
The jig assembly for the electrode tab measures the distance between the first pressing member and the second pressing member spaced apart by the control unit, and determines that the measured distance is normal when it is located within the range of the input set distance, and sets the A jig assembly for an electrode tab further comprising an inspection member that is determined to be defective if located outside the range of the interval. A welding device for an electrode tab comprising a jig assembly for an electrode tab according to claim 1.

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