KR20230087255A - Welding apparatus of electrode lead - Google Patents

Abstract

The disclosed present invention relates to an electrode lead welding device for welding an electrode lead to an electrode tab of an electrode assembly, including: an electrode assembly moving unit that moves the electrode assembly; an electrode tab measuring unit that measures the position of the electrode tab center of the electrode assembly moved by the electrode assembly moving unit; an electrode lead position adjusting unit that adjusts and corrects the position of the electrode lead; an electrode lead moving unit provided on one side of the electrode lead position adjusting unit to move the electrode lead whose position has been adjusted and corrected; and a control unit that receives the measured value from the electrode tab measuring unit and controls the operation of the electrode lead position adjusting unit.

Description

Electrode lead welding device {WELDING APPARATUS OF ELECTRODE LEAD}

The present invention relates to an electrode lead welding apparatus.

More specifically, the present invention adjusts and corrects the center position of the electrode lead in real time with respect to the center position of the electrode tab of the electrode assembly in the assembly process, and performs the welding process by matching the center position of the electrode tab and the electrode lead. It relates to an electrode lead welding device that can be used.

Recently, secondary batteries capable of charging and discharging have been widely used as energy sources for wireless mobile devices.

In addition, secondary batteries are electric vehicles and hybrid electric vehicles, which are being proposed as a solution to air pollution from conventional gasoline vehicles and diesel vehicles that use fossil fuels, as well as portable devices such as cell phones, laptops, and camcorders. It is also attracting attention as an energy source.

Therefore, the types of applications using secondary batteries are diversifying due to the advantages of secondary batteries, and it is expected that secondary batteries will be applied to more fields and products than now.

These secondary batteries are classified into lithium ion batteries, lithium ion polymer batteries, lithium polymer batteries, etc. according to the composition of electrodes and electrolytes, and the use of lithium ion polymer batteries, which are less likely to leak electrolyte and are easy to manufacture, is increasing.

In general, secondary batteries are classified into cylindrical batteries and prismatic batteries in which electrode assemblies are embedded in cylindrical and prismatic metal cans, and pouch-type batteries in which electrode assemblies are embedded in pouch-type cases of aluminum laminate sheets, depending on the shape of the battery case. .

In addition, the electrode assembly embedded in the battery case is a power generating device capable of charging and discharging, consisting of a structure in which a positive electrode, a negative electrode, and a separator are interposed between the positive electrode and the negative electrode. It is classified into a rolled jelly roll type and a stack type in which a plurality of positive and negative electrodes formed in a predetermined size are sequentially stacked with a separator interposed therebetween.

Here, since electric vehicles and the like use high-output electric energy, a plurality of battery modules are required, and a plurality of battery cells are connected in series or parallel to the inside of the battery module.

On the other hand, during the assembly process of a secondary battery, unit cells made of a positive electrode, a negative electrode, and a separator are stacked to form an electrode assembly, and then a plurality of electrode tab bundles overlapping one end of the manufactured electrode assembly are temporarily joined to form an electrode A welding process is performed between the electrode tab and the electrode lead to form a tab and bond the electrode lead to the electrode tab.

Here, after cutting the electrode tabs to which the electrode tab bundles are temporarily bonded, the electrode leads are welded to the cut electrode tabs, and the electrode assembly in which the electrode leads are welded to the electrode tabs is stored in a pouch to manufacture a battery cell. do.

On the other hand, as shown in FIG. 1, the welding apparatus 1000 for performing welding between electrode tabs and electrode leads is a bundle of electrode tabs overlapping one end of an electrode assembly (not shown) in which a plurality of battery cells are stacked. A pre-welding unit 1001 for temporarily joining the electrode tabs to form one electrode tab, and a cutting unit for cutting the bundle of electrode tabs so that the electrode tabs (not shown) temporarily joined through the pre-welding unit 1001 are neatly aligned ( 1002), an electrode lead supply unit 1004 for moving an electrode lead (not shown) toward the electrode tabs aligned neatly through the cutting unit 1002, and a main welding unit for welding the electrode tab and the electrode lead ( (not shown) includes a main welding stage 1003 provided.

Here, since the electrode tabs formed in the electrode assembly are formed by overlapping a plurality of electrode tabs in the form of a bundle, the width and length of the electrode tabs temporarily bonded to one are different depending on the degree of overlap of the electrode tab bundles.

In this way, since the width of the electrode tab is different for each electrode assembly, when welding by moving the electrode lead to the electrode tab, the electrode lead is not located at the center of the electrode tab in the width direction, and the welding is biased to one side.

In addition, since the length of the electrode tab is different for each electrode assembly, the electrode lead may move deeply to the electrode side inside the electrode tab, thereby damaging the electrode during welding and causing poor connection of the electrode lead. .

Republic of Korea Patent Publication No. 10-2017-0101857

The present invention is to solve the above problems, and measures the center position of the electrode tab of the electrode assembly in the assembly process, and adjusts and corrects the center position of the electrode lead in real time to correspond to the measured center position of the electrode tab. It is an object of the present invention to provide an electrode lead welding device capable of

In addition, an object of the present invention is to provide an electrode lead welding apparatus capable of performing an accurate welding process by matching the center location of an electrode tab with the center location of an electrode lead.

In order to realize the above object, the present invention provides an electrode lead welding apparatus for welding an electrode lead to an electrode tab of an electrode assembly, comprising: an electrode assembly moving unit for moving the electrode assembly; an electrode tab measuring unit that measures a center position of the electrode tab of the electrode assembly moved by the electrode assembly moving unit; an electrode lead position adjusting unit for adjusting and correcting the position of the electrode lead; an electrode lead moving unit provided on one side of the electrode lead position adjusting unit to move the electrode lead whose position has been adjusted and corrected; and a control unit receiving the measurement value measured by the electrode tab measurement unit and controlling the operation of the electrode lead position adjusting unit. It is characterized in that it includes.

As an example, the electrode lead position adjusting unit centers and aligns the centers of the electrode leads in the width direction corresponding to the center positions of the electrode tabs measured through the electrode tab measuring unit so that the centers of the electrode leads are positioned on the same line with each other.

As a specific example, the electrode lead position adjusting unit adjusts the position of the electrode lead so that the center position of the electrode lead corresponds to the center position of the electrode tab by performing horizontal movement on the electrode lead along the width direction of the electrode tab.

As another specific example, the electrode lead moving unit moves the centered aligned electrode lead onto the electrode tab in an aligned state.

As an example, the electrode lead moving unit moves the end of the electrode lead to enter the welding range of the electrode tab.

As another example, the electrode tap measuring unit is a vision camera.

As an example, a lighting member is provided spaced apart from the electrode tab measuring unit at a predetermined interval.

As a specific example, the lighting member includes an upper lighting member disposed at an upper portion adjacent to the electrode tab, and a lower lighting member provided at a lower portion adjacent to the electrode tab.

As another example, the electrode lead position adjusting unit includes an electrode lead measuring unit that measures a rotation amount of the electrode lead twisted in the width direction with respect to the center.

As a specific example, the electrode lead measuring unit is a vision camera.

As another specific example, the electrode lead position adjusting unit corrects the twisted center of the electrode lead to align with the center of the electrode tab by performing horizontal rotational movement of the electrode lead in the width direction.

As an example, the control unit includes a receiving unit that receives the measured value of the electrode tab measuring unit, a calculating unit that calculates the measured value received through the receiving unit, and a center setting that sets the center position of the electrode tab based on the calculated value output from the calculating unit. a range setting unit for setting the welding range of the electrode tab with the calculation value output from the operation unit, and a center position adjusting unit for controlling the electrode lead position adjusting unit to adjust the center position of the electrode lead to correspond to the center position of the electrode tab, and a welding position adjusting unit for adjusting the moving range of the electrode lead by controlling the electrode lead moving unit so that the end of the electrode lead is disposed within the welding range of the electrode tab.

As another example, the control unit provides a comparator for comparing the measured value of the electrode lead measuring unit with a preset electrode lead reference value, and a correction value for correcting twisting of the electrode lead determined through the result value compared by the comparator. It further includes a correction value calculation unit and a correction unit that corrects the placement of the electrode leads by controlling the electrode lead position adjusting unit according to the correction values output from the correction value calculation unit.

According to the present invention, the center position of the electrode tab of the electrode assembly is measured in the assembly process, and the center position of the electrode lead is adjusted and corrected in real time to correspond to the measured center position of the electrode tab, thereby accurately matching the electrode lead to the electrode tab. to perform the welding process.

Accordingly, during welding between the electrode tab and the electrode lead, deterioration in quality of the battery cell due to mismatch in the center position between the electrode tab and the electrode lead can be prevented.

In addition, the quality of the battery cell can be improved as well as the quality of the battery cell by performing a welding process after centering alignment so that the center of the electrode lead is located at the center of the electrode tab and accurately matching the center position between the electrode tab and the electrode lead. there is.

1 is a conceptual diagram schematically illustrating an electrode lead welding apparatus according to the prior art.
2 is a conceptual diagram schematically illustrating an embodiment of an electrode lead welding apparatus according to the present invention.
3 is a diagram schematically illustrating an electrode tap measuring unit according to the present embodiment.
4 is a diagram schematically showing an electrode lead position adjusting unit according to the present embodiment.
5 is a block diagram schematically showing a control unit according to the present embodiment.
6 to 12 are diagrams schematically illustrating a process of adjusting the center position of an electrode lead to correspond to the center position of an electrode tab and moving the adjusted electrode lead to a main welding stage.
13 is a diagram schematically illustrating an electrode tab measuring unit according to another embodiment of an electrode lead welding apparatus according to the present invention.
14 is a diagram schematically showing an electrode lead measuring unit according to another embodiment of an electrode lead welding apparatus according to the present invention.

Hereinafter, the present invention will be described in detail. Prior to this, terms or words used in this specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventor appropriately uses the concept of terms in order to describe his/her invention in the best way. It should be interpreted as a meaning and concept consistent with the technical spirit of the present invention based on the principle that it can be defined in the following way.

Terms such as "include" or "have" used throughout the specification of the present invention are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or other features, numbers, steps, operations, components, parts, or combinations thereof, are not precluded from being excluded in advance.

In addition, when a part such as a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the case where it is "directly on" the other part, but also the case where another part is present in the middle. Conversely, when a part such as a layer, film, region, plate, etc. is said to be "under" another part, this includes not only the case where it is "directly under" the other part, but also the case where there is another part in between. In addition, in the specification of the present invention, being disposed "on" may include the case of being disposed at the bottom as well as at the top.

In addition, when a part such as a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the case where it is "directly on" the other part, but also the case where another part is present in the middle. Conversely, when a part such as a layer, film, region, plate, etc. is said to be "under" another part, this includes not only the case where it is "directly under" the other part, but also the case where there is another part in between. In addition, in the present application, being disposed "on" may include the case of being disposed at the bottom as well as at the top.

(First Embodiment)

2 is a conceptual diagram schematically illustrating an embodiment of an electrode lead welding apparatus according to the present invention. 3 is a diagram schematically illustrating an electrode tap measuring unit according to the present embodiment. 4 is a diagram schematically showing an electrode lead position adjusting unit according to the present embodiment. 5 is a block diagram schematically showing a control unit according to the present embodiment. 6 to 12 are diagrams schematically illustrating a process of adjusting the center position of an electrode lead to correspond to the center position of an electrode tab and moving the adjusted electrode lead to a main welding stage.

As shown in FIGS. 2 to 5, the electrode lead welding apparatus 1 according to the present invention has a bundle of electrode tabs (not shown) overlapping the electrode assembly 3 with the pre-welding part 101. This is to weld the electrode lead 5 to the cut electrode tab 3a after bonding and cutting the tentatively joined electrode tab 3a neatly through the cutting part 103.

The electrode lead welding apparatus 1 of the present invention includes an electrode assembly moving unit 10, an electrode tab measuring unit 20, an electrode lead position adjusting unit 30, an electrode lead moving unit 40, and a control unit 50 ).

Here, welding of the electrode lead 5 with respect to the electrode tab 3a is performed in the main welding stage 105, and the main welding stage 105 is connected to the electrode tab measuring unit 20 and the position of the electrode lead. It is provided between the adjustment parts 30.

The electrode assembly moving unit 10 moves the electrode assembly 3 having the electrode tab 3a cut in the cutting unit 103 to the main welding stage 105 .

Specifically, the electrode assembly moving unit 10 sequentially cuts the pre-welding unit 101 for temporarily bonding the electrode tab bundles of the electrode assembly 3 and the cutting unit 103 for cutting the tentatively bonded electrode tab bundles. After moving, the electrode assembly 3 having the electrode tab 3a cut is moved to the main welding stage 105 .

At this time, the electrode assembly moving unit 10 may have a rail structure or a gripper structure capable of moving the electrode assembly 3, and the movement of the electrode assembly moving unit 10 is implemented by a conventional linear movement mechanism. Therefore, a detailed description of the moving structure will be omitted below.

The electrode tab measuring unit 20 is for measuring the center position of the electrode tab 3a of the electrode assembly 3 moved from the cutting unit 103 by the electrode assembly moving unit 10, and the cutting unit ( 103) and the main welding stage 105.

In the first embodiment of the present invention, the electrode tap measuring unit 20 may be formed of a vision camera that acquires an image of the electrode tab 3a.

With the structure as described above, the electrode tab measuring unit 20 photographs the neatly cut electrode tabs 3a through the cutting unit 103, and the electrode tabs through the captured image of the electrode tabs 3a. Measure the center position in the width direction according to the size of (3a).

On the other hand, the electrode lead position adjusting unit 30 is provided on one side opposite to the main welding stage 105 facing the cutting unit 103, and serves to adjust the position of the electrode lead 5.

That is, in the electrode lead position adjusting unit 30, the centers of the electrode leads 5 in the width direction correspond to the center positions of the electrode tabs 3a measured by the electrode tab measuring unit 20 on the same line. Align centering so that it is located at .

Specifically, the electrode lead position adjusting unit 30 horizontally moves the electrode lead 5 along the width direction of the electrode tab 3a, thereby measuring the electrode tab ( The position of the electrode lead 5 in the width direction is adjusted so that the center position of the electrode lead 5 corresponds to the center position of 3a).

To this end, the electrode lead position adjusting unit 30 is transferred through an adsorption member 31 that transfers the electrode lead 5 from a supply unit (not shown) to which the electrode lead 5 is supplied, and the adsorption member 31. and an aligning member 33 for aligning the electrode leads 5.

The adsorption member 31 is for transferring the supplied electrode lead 5 onto the aligning member 33, and adsorbs the upper surface of the electrode lead 5 supplied through the supply unit and then onto the aligning member 33. settle in

The alignment member 33 has a block shape on which the electrode leads 5 in the form of a flat plate can be seated, is formed on the seating member 35, and horizontally moves the electrode leads 5 in the width direction of the electrode tab 3a. It is structured to be able to

In other words, the alignment member 33 horizontally moves the electrode lead 5 transported and seated through the adsorption member 31 so that the center position of the electrode lead 5 corresponds to the center position of the electrode tab 3a. sorted so that

The electrode lead 5 aligned in the electrode lead position adjusting unit 30 is moved toward the electrode tab 3a by the electrode lead moving unit 40 .

To this end, an inlet groove 33a is formed in the aligning member 33 as a space in which the electrode lead moving unit 40 can enter and hold the electrode lead 5.

The electrode lead moving unit 40 is provided on one side of the electrode lead position adjusting unit 30 and moves the electrode lead 5 whose position is adjusted through the electrode lead position adjusting unit 30 .

At this time, the electrode lead moving unit 40 moves the electrode lead 5 aligned with the center of the electrode tab 3a onto the electrode tab 3a in an aligned state.

To this end, the electrode lead moving unit 40 grips the electrode lead 5 seated on the alignment member 33 of the electrode lead position adjusting unit 3 and moves it onto the electrode tab 3a. ) or a clamp.

In this way, the electrode lead moving part 40 is provided with a gripper or a clamp, and the electrode lead moving part 40 enters through the inlet groove 33a formed in the alignment member 33, so that the electrode lead moving part 40 The upper and lower surfaces of the temporary electrode lead 5 are gripped.

In addition, the electrode lead moving unit 40 grips the electrode lead 5 whose position has been adjusted through the electrode lead position adjusting unit 30 and moves it to the main welding stage 105. At this time, the electrode assembly moving unit 10 ), the electrode lead 5 is moved to the welding range W of the electrode tab 3a moved to the main welding stage 105.

That is, in the electrode lead moving unit 40, the end of the electrode lead 5 whose position is adjusted to correspond to the center position of the electrode tab 3a measured by the electrode tab measuring unit 20 is the position of the electrode tab 3a. It is moved forward to enter the range from the free end to the welding range (W).

Here, the welding range W of the electrode tab 3a is a predetermined width extending to both sides around the center in the width direction of the electrode tab 3a and a predetermined range starting from the free end of the electrode tab toward the connecting portion of the electrode plate. It means a range limited by the depth, and the welding range (W) is set to a range that can secure sufficient welding strength without damaging the electrode by welding the electrode lead (5).

The control unit 50 receives the measurement value from the electrode tap measurement unit 20 and controls the operation of the electrode lead position adjusting unit 30 .

That is, the control unit 50 sets the center position of the electrode tab 3a through the measurement value measured by the electrode tab measurement unit 20, and the electrode lead ( After setting the center position of 5), the operation of the electrode lead position adjusting unit 30 on which the electrode lead 5 is seated is controlled so that the center of the electrode tab 3a and the electrode lead 5 are located on the same line.

Then, the control unit 50 adjusts the position of the electrode lead position adjusting unit 30 so that the center of the electrode lead 5 is positioned on the same line as the center of the electrode tab 3a, and then the electrode lead at the adjusted position. The moving unit 40 controls the electrode lead 5 to move onto the electrode tab 3a.

To this end, as shown in FIG. 5, the control unit 50 includes a receiving unit 51 that receives measurement values of the electrode tap measurement unit 20 and a calculation unit 52 that calculates the received measurement values; The center setting unit 53 for setting the center value of the electrode tab 3a, the range setting unit 54 for setting the welding range W of the electrode tab 3a, and the center position of the electrode tab 3a A center position adjusting unit 55 for adjusting the center position of the electrode lead 5 correspondingly, and a welding position adjusting unit 56 for adjusting the moving range of the electrode lead 5 to the welding range W of the electrode tab 3a. includes

The receiving unit 51 receives the measured value of the electrode tab 3a measured through the electrode tab measuring unit 20 .

Here, the measurement value measured by the electrode tab measurement unit 20 may be image data of the electrode tab 3a captured by a vision camera.

The calculating unit 52 calculates the measurement value received through the receiving unit 51 . That is, the calculator 52 calculates the size of the electrode tab 3a from the image data received through the receiver 51 .

Here, the size of the electrode tab 3a is the width and length of the electrode tab 3a, and the length of the electrode tab 3a is the depth of the welding range W in which the electrode lead 5 enters and welding is allowed. It is computed.

In this way, the calculation unit 52 calculates the width and length of the electrode tab 3a and further the size through the size of the electrode tab 3a in the width direction and length direction analyzed in the image of the electrode tab 3a captured by the vision camera. can be computed.

The center setting unit 53 sets the center position of the electrode tab 3a through the calculation value output from the calculation unit 52 . That is, the center setting unit 53 sets the center position of the electrode tab 3a in the width direction through the size of the electrode tab 3a output from the calculation unit 52 .

Here, the center setting unit 53 may set the width direction center line of the electrode through the size of the electrode tab 3a.

As described above, the center position can be set in the width direction of the electrode tab 3a through the center setting unit 53 of the control unit 50, and the electrodes are cut to be neatly aligned through the cutting unit 103. The center position may be set to correspond to the size of the tab 3a.

The range setting unit 54 sets the welding range W of the electrode tab 3a based on the calculated value output from the calculating unit 52 .

That is, the range setting unit 54 sets the welding range W in the longitudinal direction of the electrode tab 3a through the calculated value output from the calculation unit 52, and at this time, the center of the electrode tab 3a in the width direction A range limited to a predetermined width extending from the center to both sides and a predetermined depth starting from the free end of the electrode tab 3a toward the connecting portion of the electrode plate is set as the welding range W.

The electrode lead 5 is moved through the electrode lead moving unit 40 so that the end of the electrode lead 5 overlaps the welding range W set in this way.

The center position adjusting unit 55 adjusts the center position of the electrode lead 5 to correspond to the center position of the electrode tab 3a.

That is, the center position adjusting unit 55 is the electrode lead position adjusting unit 30 so that the center position of the electrode lead 5 is located on the same line with the center position of the electrode tab 3a set through the center setting unit 53. The position of the electrode lead 5 seated on the electrode lead position adjusting unit 30 is adjusted by controlling the operation of the.

At this time, the center position adjusting unit 55 horizontally moves the electrode lead position adjusting unit 30 in the width direction of the electrode tab 3a so that the center of the electrode lead 5 is positioned on the same line as the center of the electrode tab 3a. let it do

In this way, the center position adjusting unit 55 performs centering alignment to align the center of the electrode lead 5 corresponding to the center position that changes according to the size of the electrode tab 3a.

The welding position adjusting unit 56 adjusts the ends of the electrode leads 5 to overlap within the welding range W of the electrode tab 3a.

That is, the welding position adjusting unit 56 controls the electrode lead moving unit 40 so that the end of the electrode lead 5 is disposed to correspond to the welding range W of the electrode tab 3a, so that the electrode lead 5 adjust the movement range of

To this end, the welding position adjusting unit 56 moves the electrode lead moving unit 40 so that the end of the electrode lead 5 is located within the welding range W of the electrode tab 3a set through the range setting unit 54. The movement distance of is set, and the electrode lead 5 is moved by the set movement distance so that the end of the electrode lead 5 is placed within the welding range W of the electrode tab 3a.

Hereinafter, an operation process of an electrode lead welding apparatus according to an embodiment of the present invention will be briefly described with reference to FIGS. 6 to 12 .

First, the electrode assembly 3 is manufactured by stacking unit cells (not shown) made of an anode (not shown), a cathode (not shown), and a separator (not shown).

In addition, after temporarily bonding a plurality of electrode tab bundles (not shown) overlapping one end of the manufactured electrode assembly 3 to the pre-welding part 101, the temporarily bonded electrode tabs 3a are cut to the cutting part 103 ) to cut evenly.

Then, the electrode assembly 3 having the electrode tab 3a cut is moved to the main welding stage 105 to perform welding with the electrode lead 5.

Here, the electrode assembly 3 moving from the cutting unit 103 to the main welding stage 105 is cut through the electrode tab measuring unit 20 provided between the cutting unit 103 and the main welding stage 105. The center of the electrode tab 3a is measured.

At this time, the electrode tap measurement unit 20 photographs the electrode tab 3a in the electrode assembly 3 and transmits the captured image of the electrode tab 3a to the controller 50, and the controller 50 Through the image of the electrode tab 3a, the center position in the width direction according to the size of the electrode tab 3a is measured.

Also, the controller 50 sets the welding range W of the electrode tab 3a through the image of the electrode tab 3a.

Meanwhile, the electrode lead 5 for welding with the electrode tab 3a is transferred from a supply unit (not shown) to the electrode lead position adjusting unit 30 through the adsorption member 31 .

As described above, the alignment member 33 of the electrode lead position adjusting unit 30 is moved in the width direction of the electrode tab 3a to correspond to the center position of the electrode tab 3a measured through the control unit 50. to place the center positions of the electrode tab 3a and the electrode lead 5 on the same line.

Then, the electrode lead moving part 40 is moved toward the electrode tab 3a so that the end of the electrode lead 5 overlaps the welding range W of the electrode tab 3a.

In this way, the electrode tab 3a on the main welding stage 105 and the electrode lead 5 whose end is located in the welding range W of the electrode tab 3a are main wells provided on the main welding stage 105. It is welded by the welding part 107.

(Second Embodiment)

13 is a diagram schematically showing an electrode tab measuring unit according to another embodiment of an electrode lead welding apparatus according to the present invention.

The electrode lead welding apparatus 1 according to the present embodiment has partially changed the configuration of the electrode tab measuring unit 20, and adds a lighting member 60 to the electrode tab measuring unit 20 to form an electrode assembly with a vision camera. It is improved so that the photographing of the electrode tab 3a of (3) is easy.

That is, as shown in FIG. 13 , the lighting member 60 is spaced apart from the electrode tab measuring unit 20 at a predetermined interval.

Here, the lighting member 60 includes an upper lighting member 61 provided on an upper portion proximate to the electrode tab 3a and a lower lighting member 63 provided on a lower portion proximate to the electrode tab 3a. do.

At this time, the upper lighting member 61 and the lower lighting member 63 are inclined at a predetermined angle with respect to the electrode tab measuring unit 20 .

In this way, the upper lighting member 61 is provided obliquely on the upper portion of the electrode tab 3a to radiate light toward the upper surface of the electrode tab 3a, and the lower lighting member 63 illuminates the upper surface of the electrode tang. It is provided at an approaching lower part and is inclined so as to irradiate light toward the lower surface of the electrode tab 3a.

Due to the structure as described above, when the electrode tab 3a is photographed through the electrode tab measurement unit 20, the shape of the electrode tab 3a can be three-dimensionally photographed, and through this, the size of the electrode tab 3a and measurement of the center position becomes easy.

In the present embodiment, the lighting member 60 is provided on the top and bottom of the electrode tab 3a, respectively, but the lighting member 60 is provided only on the top or bottom of the electrode tab 3a. It is also possible, and other various modifications are possible.

(Third Embodiment)

14 is a diagram schematically showing an electrode lead measuring unit according to another embodiment of an electrode lead welding apparatus according to the present invention.

The electrode lead position adjusting unit 30 according to the present embodiment is transferred from the supply unit to the electrode lead position adjusting unit 30 through the suction member 31, and one side in the width direction based on the center position of the electrode lead 5, or the other side It is for correcting the arrangement of the electrode lead 5 twisted to the side in various angles.

To this end, as shown in FIG. 14, the electrode lead position adjusting unit 30 further includes an electrode lead measuring unit 70 that measures the amount of rotation of the electrode lead 5 in the width direction based on the center. include

In this way, since the electrode lead measuring unit 70 is provided in the electrode lead position adjusting unit 30, the amount of rotation of the electrode lead 5 transferred from the supply unit to the alignment member 33 on a horizontal plane is measured. can do.

Through this, horizontal rotation of the electrode lead 5 in the width direction can be performed so that the twisted center of the electrode lead 5 is accurately aligned with the center of the electrode tab 3 on the same line.

Here, one end of the shaft 37 is connected to the lower surface of the seating member 35 on which the alignment member 33 moves horizontally, and the other end of the shaft 37 is connected to a motor (not shown). It is made so that the seating member 35 can be rotated.

With the structure as described above, when the electrode lead 5 is twisted on the alignment member 33, the seating member 35 is rotated by the rotation of the shaft 37 by driving the motor, Accordingly, as the aligning member 33 on the seating member 35 rotates, the twisted center of the electrode lead 5 can be corrected to align with the center of the electrode tab 3 on the same line.

Meanwhile, the electrode lead measurement unit 70 may be formed of a vision camera. In this case, the electrode lead measurement unit 70 transmits image data of the electrode lead 5 captured to the control unit 50, and the The control unit 50 may correct the disposition of the twisted electrode lead 5 after determining the twisted degree of the electrode lead 5 through the captured image data.

To this end, the controller 50 further includes a comparison unit 57, a correction value calculation unit 58, and a correction unit 59.

The comparison unit 57 compares the measured value of the electrode lead 5 measured by the electrode lead measuring unit 70 with a preset reference value of the electrode lead 5.

At this time, the comparator 57 may compare image data photographed by the electrode lead measurement unit 70 with image data of the electrode leads 5 in a predetermined normal arrangement.

The correction value calculation unit 58 calculates a correction value for correcting the twist of the electrode lead 5 determined through the result value compared by the comparison unit 57. That is, the correction value calculation unit 58 determines whether and how much the electrode lead 5 is twisted through the image of the electrode lead 5 compared in the comparison unit 57, and when the twist is determined, A correction value for correcting the arrangement of the true electrode leads 5 to the arrangement in a steady state is calculated.

Here, the correction value may include correction information such as a rotation direction and a rotation angle (θ) or coordinate values for correcting the twist of the electrode lead 5 .

The correction unit 59 corrects the placement of the electrode leads 5 by controlling the electrode lead position adjusting unit 30 according to the correction values output from the correction value calculation unit 58 .

Here, the correction unit 59 horizontally rotates the aligning member 33 of the electrode lead position adjusting unit 30 to one side or the other side in the width direction of the electrode lead 5 to correct the twist of the electrode lead 5 .

That is, the electrode lead 5 transferred to the alignment member 33 through the adsorption member 31 is horizontally rotated in the width direction through the electrode lead position adjusting unit 30 to compensate for twisting. and aligned normally, while moving in the width direction of the electrode tab 3a through the electrode lead position adjusting unit 30, the center is positioned on the same line as the center of the electrode tab 3a.

And, when it is determined that the electrode lead 5 is not twisted or the twist has been corrected and is aligned so that the center of the electrode lead 5 is located on the same line as the center of the electrode tab 3a, the control unit 50 moves the electrode lead 5 through the electrode lead moving member 40 to the main welding stage 105 for welding with the electrode tab 3a.

Thereafter, the electrode assembly 3 transferred to the main welding stage 105 and the electrode lead 5 disposed within the welding range W of the electrode tab 3a are subjected to a welding process performed on the main welding stage 105. are mutually welded through

In the above, the present invention has been shown and described in relation to specific embodiments, but it is common knowledge in the art that various modifications and changes are possible within the limits that do not depart from the spirit and scope of the invention shown in the appended claims. Anyone who has it will be able to easily understand.

1: electrode lead welding device
3: electrode assembly
3a: electrode tab
5: electrode lead
10: electrode assembly moving part
20: electrode tab measuring unit
30: electrode lead position adjusting unit
31: adsorption member
33: alignment member
33a: inlet groove
35: seating member
37: shaft
40: electrode lead moving part
50: control unit
51: receiver
52: calculation unit
53: center setting unit
54: range setting unit
55: center position adjustment unit
56: welding position adjustment unit
57: comparison unit
58: correction value calculation unit
59: correction unit
60: lighting member
61: upper lighting member
63: lower lighting member
70: electrode lead measuring unit
101: pre-welding part
103: cutting unit
105: main welding stage
107: main welding part
W: welding range

Claims (13)

In the electrode lead welding device for welding the electrode lead to the electrode tab of the electrode assembly,
an electrode assembly moving unit that moves the electrode assembly;
an electrode tab measuring unit measuring a center position of an electrode tab of the electrode assembly moved by the electrode assembly moving unit;
an electrode lead position adjusting unit for adjusting and correcting the position of the electrode lead;
an electrode lead moving unit provided on one side of the electrode lead position adjusting unit to move the electrode lead whose position has been adjusted and corrected; and
a control unit receiving the measurement value measured by the electrode tab measurement unit and controlling an operation of the electrode lead position adjusting unit;
Electrode lead welding apparatus comprising a.
According to claim 1,
The electrode lead position adjusting unit,
Electrode lead welding apparatus, characterized in that centering alignment so that the width direction centers of the electrode leads are located on the same line with each other in correspondence to the width direction center position of the electrode tab measured through the electrode tab measuring unit.
According to claim 2,
The electrode lead position adjusting unit,
Electrode lead welding apparatus, characterized in that by performing a horizontal movement with respect to the electrode lead along the width direction of the electrode tab to adjust the position of the electrode lead so that the center position of the electrode lead corresponds to the center position of the electrode tab.
According to claim 2,
The electrode lead moving part,
Electrode lead welding apparatus, characterized in that for moving the centering-aligned electrode lead onto the electrode tab in an aligned state.
According to claim 4,
The electrode lead moving part,
Electrode lead welding apparatus, characterized in that for moving the end of the electrode lead to enter the welding range of the electrode tab.
According to claim 1,
The electrode tap measurement unit,
Electrode lead welding device, characterized in that the vision camera.
According to claim 6,
Electrode lead welding apparatus, characterized in that a lighting member is provided spaced apart from the electrode tab measuring unit at a predetermined interval.
According to claim 7,
The lighting member,
Electrode lead welding apparatus comprising an upper lighting member provided at an upper portion proximate to the electrode tab, and a lower lighting member provided at a lower portion proximate to the electrode tab.
According to claim 1,
The electrode lead position adjusting unit,
Electrode lead welding apparatus comprising an electrode lead measuring unit for measuring the rotation amount of the electrode lead twisted in the width direction with respect to the center.
According to claim 9,
The electrode lead measurement unit,
Electrode lead welding device, characterized in that the vision camera.
According to claim 9,
The electrode lead position adjusting unit,
Electrode lead welding apparatus, characterized in that by performing horizontal rotational movement of the electrode lead in the width direction to correct the center of the twisted electrode lead to be aligned with the center of the electrode tab.
According to claim 1,
The control unit,
A receiving unit for receiving the measurement value of the electrode tab measurement unit, a calculation unit for calculating the measurement value received through the receiving unit, a center setting unit for setting the center position of the electrode tab with the calculated value output from the calculation unit, and the calculation unit A range setting unit for setting the welding range of the electrode tab with the calculated value output from the above; a center position adjusting unit for controlling the electrode lead position adjusting unit to adjust the center position of the electrode lead to correspond to the center position of the electrode tab; and and a welding position adjusting unit configured to adjust the range of movement of the electrode lead by controlling the electrode lead moving unit so that the end of the electrode lead is disposed within the welding range of the electrode tab.
According to claim 11,
The control unit,
A comparator that compares the measured value of the electrode lead measurement unit with a preset electrode lead reference value, and a correction value calculator that calculates a correction value for correcting the distortion of the electrode lead determined through the result value compared by the comparator, and a correction unit controlling the electrode lead position adjustment unit according to the correction value output from the correction value calculation unit to correct the arrangement of the electrode leads.

Images