TWI643357B - Tabbing apparatus - Google Patents

Abstract

A bonding device for supplying wires to upper and lower portions of a battery cell and a clamp to an upper portion of the battery cell so as to electrically connect a plurality of battery cells transported in a horizontal direction. The bonding device includes a wire supplying part for supplying a wire and a wire. The extraction section clamps the front end of the wire for extraction; the wire clamping section clamps the front end and the rear end of the extracted wire; the wire cutting section cuts the rear end of the clamped wire; and the clamp driving section, The upper part of the battery cell transfers a lead holding portion.

Description

Overlap device

The present invention relates to a tabbing device, and more specifically, to a tapping device that supplies wires to the upper and lower portions of a battery cell and supplies jigs to the upper portion of the battery cell in order to make it horizontal. The plurality of battery cells transferred in directions are electrically connected.

Humans obtain most of their energy mainly from oil, coal, nuclear energy, natural gas, etc. This fossil and nuclear energy is expected to dry up in the near future. Therefore, countries around the world are stepping up the development of renewable energy sources. Among them, solar power generation has received more attention because it can obtain electricity in any place where the sun shines, and it is completely harmless unlike other power generation methods.

For solar power generation, a semiconductor element that converts solar energy into electricity is called a solar cell. Generally, only a maximum voltage of about 0.5 V can be generated by a single solar cell. Therefore, it is necessary to connect solar cells in series for use. A module in which unit solar cells are connected and modularized in this manner is called a solar cell module.

The manufacturing process of a solar cell module can be roughly divided into five steps, a cell test step, a tabbing step, a lay-up step, a lamination step, and a module. Test steps.

First, in the battery cell test step, battery cells with various electrical characteristics are tested and then distinguished to classify battery cells with similar electrical characteristics. Second, in the lap step, in order to connect solar cells in series, For batteries, a conductive tape is bonded to a solar cell.

Third, in the coating step, a row of solar cells manufactured in the overlap step is rearranged horizontally to obtain the desired shape, and then low-iron tempered glass and ethylene-vinyl acetate copolymer (EVA: ethylene vinyl acetate) are laminated. ), Back sheet, etc.

Fourth, in the laminating step, the laminated solar cell module material is vacuum-pressed at a high temperature, so that the solar cell module can be impact resistant and waterproof. Finally, in the module test step, it is tested whether the completed solar cell module works normally.

On the other hand, the overlapping step is the most core step in the steps. If the ribbon is disconnected or not properly joined, the entire solar cell module cannot be used. Therefore, the overlapping step determines the solar cell module. Set of qualities.

When the overlap process is briefly observed, two strands of strip material supplied from a ribbon reel are cut. The cut strips are placed on the solar cell by a gripper, and the solar cell is then cut. Soldering with the strip. At this time, a solar cell or ribbon flux is applied.

Recently, solar cells are becoming thinner. As the thickness of the solar battery cell is reduced, the solar battery cell may be damaged due to pressure when the solar battery cell is transferred. In addition, when solar cells are soldered, they may be bent due to heat, which may cause damage to the solar cells.

As a prior art, Korean Registered Patent No. 10-1058399 discloses a tabber-stringer and a tabbing-stringing method. The overlapping and tandem device includes: a ribbon leveler, which corrects the up, down, left, and right bending of the strip supplied from the strip winding machine, so that the strip is unfolded flatly; Wood cutting machine, cutting by A strip that is flattened by the strip-leveling machine; a first gripper that grips one end of the strip that is cut by the strip-cutting machine; a second gripper , Moving the cut strip-shaped material to a main conveyor; a flux coating section, which applies a flux to the solar cell or the strip-shaped material; and a welding section, such that the solar cell and the Said band-shaped material joining. The flux coating portion includes a linear robot coupled to a rail and two flux nozzles coupled to the linear robot.

Korean Registered Patent No. 10-1097052 (December 22, 2011) discloses a laser bonding device for a solar thermal battery panel, which is a bonding device for bonding a strip-shaped material to the upper surface of a solar thermal battery panel. With the transfer by a conveyor, the overlapping device includes: a laser emitting portion that emits a laser beam; a beam adjusting portion including a beam expander and a beam uniform distributor, the beam expander adjusting The size of the laser beam emitted by the laser emitting section, the beam uniform distributor makes the laser beam uniformly distributed; the optical section adjusts the direction of the laser beam to the The upper surface irradiates the laser beam passing through the beam adjusting section; the objective lens condenses the laser beam passing through the optical section, so that the solar thermal battery panel and the strip-shaped material can be joined to each other A laser beam that irradiates the focused light; a uniform pressurizing member is provided on the transfer conveyor below the objective lens, and faces the upper surface of the solar thermal battery plate transferred by the transfer conveyor Uniform line pressure, whereby the device can be improved lap solar thermal panels.

Korean Laid-Open Patent No. 10-2013-0011677 discloses a bonding device for a solar battery cell. The bonding device for a solar battery cell joins a metal electrode to the solar battery cell, and the metal electrode electrically connects a plurality of electrode lines formed on the solar battery cell. The bonding device for a solar battery cell includes a bonding unit provided in a state in which the metal electrode is disposed on an upper portion of the solar battery cell, with respect to at least one surface of the solar battery cell. Moves up and down and is added when moving towards the solar cell In a hot state, the solar cell and the metal electrode are pressurized so as to be abutted with each other, so that the metal electrode is bonded to the solar cell.

However, such a conventional bonding device for a solar cell has a problem in that it takes a long time to supply and arrange a lead such as a strip or a wire, or a delay in the bonding step occurs for this purpose.

Patent Document 0001: Korean Registered Patent No. 10-1058399

Patent Document 0002: Korean Published Patent No. 10-2013-0011677

The invention provides a bonding device, which shortens the time for arranging a lead wire and a clamp to a battery unit, and can improve the yield and efficiency of the bonding device.

In addition, the present invention provides a lap device which can easily hold the wires while improving the arrangement performance of the wires.

In addition, the present invention provides a lap device that can easily hold a lead wire while minimizing a moving space of the lead wire.

In addition, the present invention provides a bonding device, which is capable of improving the supply performance of the wire while being easy to supply the wire and cutting the wire.

In addition, the present invention provides a bonding device capable of variously adjusting the length of the lead wires corresponding to the first battery cell, the middle battery cell, and the final battery cell to be transferred.

In addition, the present invention provides a bonding device, which is easy to supply the battery unit and easy to place the lead wire on the lower part of the battery unit.

An embodiment of the present invention provides a bonding device, which supplies wires to upper and lower portions of a battery cell, and supplies a clamp to an upper portion of the battery cell, so as to electrically connect a plurality of battery cells transported in a horizontal direction. The connection device includes: a lead wire supplying section for supplying the lead wire; a lead wire extracting section for holding the front end of the lead wire for extraction; a lead wire holding section for holding the front end and the rear end of the drawn wire; a lead wire cutting section Cutting a rear end of the lead wire being clamped; and a clamp driving part for transferring the lead wire clamping part to an upper portion of the battery unit.

In one embodiment, the overlapping device further includes a clamp holding portion for clamping the clamp.

In one embodiment, the clamp driving section transfers the lead clamp section and the clamp clamp section to an upper portion of the battery cell.

In one embodiment, the jig clamping section includes a jig clamp, which clamps and supplies the jig, so that the jig and the The wires are placed together on the battery cell.

In an embodiment, the wire clamping portion includes a first clamp, a second clamp, and a third clamp, and the first clamp, the second clamp, and the third clamp are spaced apart in order. It is disposed downstream of the lead wire supply portion and clamps the lead wire.

In one embodiment, the first clamp and the second clamp clamp the wire supplied to the first battery cell being transferred, and the first clamp and the third clamp clamp the wire. The second clamp and the third clamp clamp the leads supplied from one or more intermediate battery cells transferred after the first battery cell, and clamp the leads supplied to the last battery cell transferred.

In one embodiment, the wire clamping portion includes a fourth clamp and a fifth clamp, and the fourth clamp and the fifth clamp are disposed downstream of the wire supply portion in a manner of moving forward and backward. To clamp the wire.

In one embodiment, the fourth clamp and the fifth clamp moving forward hold the wire supplied to the first battery cell being transported, and the fourth clamp and the fifth clamp clamp toward The fifth clamp and the fourth clamp moved rearwardly hold the wires supplied to the last battery cell being transferred, the wires being supplied from the one or more intermediate battery cells transferred after the first battery cell.

In one embodiment, the wire holding portion includes a clamp, which clamps the wire by moving left and right.

In one embodiment, the wire supply section includes a supply unit that unwinds and provides a wound wire.

In one embodiment, the wire cutting portion includes a cutting unit that cuts a wire unwound from the wire supply portion.

In one embodiment, the cutting unit includes a cutting blade that cuts the wire by moving left and right.

In one embodiment, the wire extraction section is downstream of the wire supply section and the wire cutting section, and adjusts the cutting length of the wire by moving forward and backward.

In an embodiment, the bonding device further includes a battery cell supply portion, which is disposed at a side of the lead supply portion, and supplies the battery cell to a welding interval so that the lead and The clamp is attached to the battery cell, and the battery cell and the lead wire are bonded to each other.

According to an embodiment, by disposing and placing the lead wire and the clamp on the upper portion of the battery cell by the clamp driving portion, the time for disposing the lead wire and the clamp on the battery cell can be shortened. This can improve the yield and efficiency of the bonding device.

In addition, the lead holding portion includes fixed clamps provided at three locations to hold the lead supplied to each of the first battery cell, the intermediate battery cell, and the final battery cell that are sequentially transferred, thereby easily holding the lead. At the same time, it can improve the layout performance of the wire.

In addition, the lead holding section includes two movable clamps provided to hold the lead supplied to each of the first battery cell, the intermediate battery cell, and the final battery cell that are sequentially transferred, thereby making it easy to hold the lead. At the same time, it can improve the layout performance of the wire.

In addition, the lead holding portion includes a jig for holding the lead by moving in the left-right direction, so that the lead can be easily held while the moving space of the lead can be minimized.

In addition, the wound wire is unwound from the wire supply portion, and is cut and fed by moving the wire cutting portion in the left-to-right direction, so that the wire can be easily supplied and the wire can be easily cut, and the wire supply performance can be improved.

In addition, downstream of the wire supply section and the wire cutting section, the cutting length of the wire is adjusted by forward and backward movement of the wire extraction section, so that various adjustments can be made corresponding to the first battery cell, intermediate battery cell, and final battery cell being transferred. The length of the wire.

In addition, the battery cell supply unit includes a battery cell supply unit disposed on a side (for example, left, right, or left and right sides) of the wire supply unit, so that the battery unit can be easily supplied and the wires can be easily placed on the lower portion of the battery unit.

2‧‧‧ lead

3‧‧‧ Fixture

10‧‧‧Wire Supply Department

20‧‧‧Wire extraction section

21‧‧‧Wire clamp

21a‧‧‧ fixed clamp

21b‧‧‧mobile clamp

21c‧‧‧Cutting fixture

30‧‧‧Wire holding section

31‧‧‧first clamp

32‧‧‧second clamp

33‧‧‧ Third clamp

34‧‧‧ Fourth clamp

35‧‧‧The fifth clamp

40‧‧‧Wire cutting section

50‧‧‧Jig holder

60‧‧‧Battery unit input department

70‧‧‧ Battery Unit Supply Department

FIG. 1 is a block diagram showing an example of a wire grip portion of a bonding apparatus according to an embodiment of the present invention.

FIG. 2 to FIG. 4 are block diagrams showing an operation state of an example of a lead holding portion of a bonding apparatus according to an embodiment of the present invention.

Fig. 5 is a block diagram showing another example of a lead wire clamping portion of a bonding apparatus according to an embodiment of the present invention.

FIG. 6 to FIG. 9 are block diagrams showing operation states of another example of the lead holding portion of the bonding apparatus according to the embodiment of the present invention.

Fig. 10 is a block diagram showing a lead wire extraction unit of a bonding apparatus according to an embodiment of the present invention.

Fig. 11 is a block diagram showing a bonding apparatus according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in more detail with reference to the drawings.

In the following description, the front direction indicates the right direction in FIGS. 1 to 9, and the rear direction indicates the left direction in FIGS. 1 to 9. The left side indicates the left direction in FIG. 11, and the right side indicates the right direction in FIG. 11. The upper side indicates the upper side in FIGS. 1 to 9, and the lower side indicates the lower side in FIGS. 1 to 9. The horizontal direction indicates a direction on a plane including front, rear, left, and right.

As shown in FIGS. 1 to 4, the bonding device of this embodiment includes a wire supply portion 10, a wire extraction portion 20, a wire holding portion 30, a wire cutting portion 40, and a clamp driving portion. The lead wire 2 is supplied to the upper and lower portions of the battery cell, and the jig 3 is supplied to the upper portion of the solar battery cell to electrically connect the plurality of battery cells for the solar cell that are transported in the horizontal direction.

The lead wire supply unit 10 supplies the lead wires 2 so as to be placed on the battery cells. The wire supply unit 10 includes a supply unit that unwinds the wire 2 wound around a winding or a roller to provide the wire 2.

The lead extraction unit 20 extracts the tip of the lead 2 supplied from the lead supply unit 10. The lead extraction unit 20 includes a lead clamp 21 that is downstream of the lead supply portion 10 and the lead cutting portion 40 and adjusts the cutting length of the lead 2 by moving forward and backward.

As shown in FIG. 10, the wire clamp 21 includes a fixed clamp 21 a and a moving clamp 21 b to clamp the wire 2 supplied from the wire supply unit 10. In a state where the wire 2 is inserted between the fixed clamp 21 a and the moving clamp 21 b, the wire 2 is clamped and fixed by moving the moving clamp 21 b left and right.

In addition, the wire clamp 21 may further include a cutting jig 21c that cuts the wire 2 in a state where the wire 2 is inserted between the fixed clamp 21a and the mobile clamp 21b.

The driving device of the jig is provided at the lower portion of the wire clamp 21 and provides a driving force for the left-right movement to the moving clamp 21b. For example, the driving device of the jig includes an actuator such as a hydraulic cylinder or a linear motor.

The front-rear driving device of the clamp is provided at the lower part of the wire clamp 21, and the guide wire clamp 21 provides a driving force for forward-backward movement. For example, the front and rear driving device of the jig includes an actuator such as a hydraulic cylinder or a linear motor.

The lead holding portion 30 holds the front end and the rear end of the lead 2 extracted from the lead supply portion 10 downstream of the lead supply portion 10 by the lead extraction portion 20, and arranges the cut lead 2 to the upper and lower portions of the battery cell.

The wire clamping portion 30 includes a first clamp 31, a second clamp 32, and a third clamp 33. The first clamp 31, the second clamp 32, and the third clamp 33 are separated from each other by a predetermined distance. They are sequentially arranged downstream of the wire supply section 10, and a plurality of wires 2 are sequentially held and arranged.

As shown in FIG. 2, the first clamp 31 and the second clamp 32 move downward to clamp the lead wire 2 supplied to the first battery cell to be transferred. As shown in FIG. 3, the first clamp 31 and the third clamp 33 move downward to clamp the lead wires 2 supplied to one or more intermediate battery cells that are transferred after the first battery cell. As shown in FIG. 4, the second clamp 32 and the third clamp 33 move downward to clamp the lead wire 2 supplied to the last battery cell to be transferred.

The first clamp 31, the second clamp 32, and the third clamp 33 are the same as the wire clamp 21 of the wire extraction portion 20, and the wires are inserted between the fixed clamp and the movable clamp, and the The lead wire 2 is held by the left and right movement of the moving clamp and is arranged toward the upper and lower portions of the battery cell.

In a state where the cutting length of the wire 2 unwound from the wire supply unit 10 by the wire extraction portion 20 is adjusted, the wire cutting portion 40 cuts the rear end of the wire 2 held by the wire holding portion 30.

The wire cutting portion 40 includes a cutting unit that cuts the wire 2 unwound from the wire supply portion 10. The cutting unit includes a cutter, and the wire 2 is cut by moving the cutter left and right. The cutting unit moves the cutting blade to the left and right to cut the wire 2 in a state where the wire 2 is inserted and fixed between the fixed clamp and the moving clamp.

In addition, the overlapping device of this embodiment further includes a clamp holding portion 50 that clamps the clamp 3.

The jig holding section 50 includes a jig clamp that holds and supplies the jig 3 so that the jig 3 is arranged on the upper part of the battery cell in a state where the lead wire 2 is supplied to the battery cell so that the lead wire 2 and the jig 3 together Placed in the battery unit.

The clamp driving section transfers the lead clamp section 30 and the clamp clamp section 50 to an upper portion of the battery cell. In a state where the lead wire 2 is placed on the upper and lower portions of the battery cell, the clamp 3 is arranged on the upper portion of the battery cell, and the lead wire 2 and the clamp 3 are placed on the battery cell together.

The clamp driving unit includes a linear transfer device such as a hydraulic cylinder block or a linear motor, which causes the wire 2 and the clamp 3 to move laterally from the downstream of the wire supply portion 10 and the wire cutting portion 40 (for example, left, right Or left and right).

In addition, as shown in FIG. 5 to FIG. 9, another wire clamping portion 30 of the lap device of this embodiment may include a fourth clamp 34 and a fifth clamp 35. The fourth clamp 34 and The fifth clamp 35 is provided downstream of the wire supply portion 10 so as to move forward and backward, and clamps the wire 2.

As shown in FIG. 6, the fourth clamp 34 is lowered, and the fifth clamp 35 is moved backward from the downstream of the wire cutting portion 40 and lowered. Thereafter, the fourth clamp 34 and the fifth clamp 35 clamp the lead wire 2 supplied to the first battery cell to be transferred.

As shown in FIG. 7, the fourth clamp 34 and the fifth clamp 35 are lowered while maintaining a distance from each other, thereby holding the lead wire 2 supplied to one or more intermediate battery cells transferred after the first battery cell. .

As shown in FIG. 8, the fifth clamp 35 is lowered, and the fourth clamp 34 is moved forward from the downstream of the wire cutting portion 40 and lowered. After that, the fourth clamp 34 and the fifth clamp 35 clamp the lead 2 supplied to the last battery cell to be transferred.

The lead wire 2 supplied to the last battery cell is cut by the lead wire extraction section 20 and the lead wire cutting section 40 while being held by the fourth clamp 34 and the fifth clamp 35 shown in FIG. 6. As shown in FIG. 9, the fourth clamp 34 and the fifth clamp 35 that hold the lead 2 are moved forward and downstream of the guide wire extraction portion 20 and the lead cutting portion 40, so that the lead 2 can be arranged in the battery cell.

In addition, similar to the wire clamp 21 of the wire extraction section 20, the fourth clamp 34 and the fifth clamp 35 move the clamp to the left and right by moving the clamp with the wire inserted between the fixed clamp and the movable clamp. Hold the wire 2 and arrange it toward the upper and lower portions of the battery unit.

In addition, as shown in FIG. 11, the bonding device of this embodiment may further include a battery cell input portion 60 and a battery cell supply portion 70, and the battery cell input portion 60 and the battery cell supply portion 70 are provided in a wire supply. The sides of the portion 10 (eg, left, right, or left and right). The battery cell input unit 60 sequentially inputs a single battery cell to the battery cell supply unit 70. In addition, the battery cell supply unit 70 supplies the battery cells to the welding section so that the battery cells and the lead wires 2 are bonded to each other in a state where the lead wires 2 and the clamp 3 are placed on the battery cells.

The battery cell input unit 60 sequentially inputs a single battery cell among a plurality of battery cells loaded in a certain space container into the battery cell supply unit 70. The battery cell input unit 60 includes a transfer device such as a robot, a loader, and the like, and sequentially supplies a plurality of battery cells.

The battery cell supply unit 70 includes a battery cell transfer unit that transfers the battery cells sequentially. The battery unit transfer unit may include: a driving roller that provides a transfer driving force so as to sequentially supply the battery units; and a transfer belt (belt) coupled to the outer groove of the driving stick and transferred by the driving force of the driving stick.

In the bonding device of the present embodiment, the lead wire 2 is extracted from the lead wire supply section 10 by the lead wire extraction section 20. One of the wire holding portions 30 provided on the left and right sides of the wire supply portion 10 moves downstream of the wire supply portion 10 to hold both ends of the wire 2. Both ends of the lead wire 2 are cut, and the lead wire 2 is transferred to a battery cell supply part 70 through the lead holding part 30, so that the lead wire 2 is placed on the upper and lower portions of the battery cell.

Thereafter, the lead wire 2 is extracted from the lead wire supply section 10 by the lead wire extraction section 20. The other wire holding portions 30 provided on the left and right sides of the wire supply portion 10 move downstream of the wire supply portion 10, thereby holding both ends of the wire 2. Both ends of the lead wire 2 are cut, and the lead wire 2 is transferred to the other battery cell supply part 70 through the lead holding part 30, so that the lead wire 2 is placed on the upper and lower portions of the battery cell.

Therefore, in the bonding device of the present embodiment, the lead wires 2 are alternately transferred and supplied to the battery cell supply units 70 provided on the left and right sides of the lead wire supply section 10. Accordingly, in the bonding device, the lead wires 2 are continuously supplied to the left and right battery cells, and the work efficiency can be improved.

As described above, according to an embodiment, the lead wire and the clamp are arranged and placed together on the upper portion of the battery cell by the clamp driving portion, so that the time for arranging the lead wire and the clamp to the battery cell can be shortened. This can improve the yield and efficiency of the bonding device.

In addition, the lead holding portion includes fixed clamps provided at three locations to hold the lead supplied to each of the first battery cell, the intermediate battery cell, and the final battery cell that are sequentially transferred, so that it is easy to hold the lead. At the same time, it can improve the layout performance of the wire.

In addition, the lead holding section includes two movable clamps provided to hold the lead supplied to each of the first battery cell, the intermediate battery cell, and the final battery cell that are sequentially transferred, so that it is easy to hold the lead. At the same time, it can improve the layout performance of the wire.

In addition, the wire holding portion includes a clamp for holding the wire by moving left and right, so that it is easy to hold the wire and minimize the moving space of the wire.

In addition, the wound wire is unwound from the wire supply section, and cut and fed by the left and right movement of the wire cutting section, so that the wire can be easily supplied and cut, and the wire supply performance can be improved.

In addition, downstream of the wire supply section and the wire cutting section, the cutting length of the wire is adjusted by forward and backward movement of the wire extraction section, so that various adjustments can be made corresponding to the first battery cell, intermediate battery cell, and final battery cell being transferred. The length of the wire.

In addition, the battery cell supply unit includes: a battery unit supply unit disposed on a side (for example, left, right, or left and right sides) of the wire supply unit; and a lower holding unit that holds the wire in an inclined manner, so the effect is that It is easy to supply the battery unit and it is easy to place the lead wire on the lower part of the battery unit.

The invention described above can be implemented in various other forms without departing from the technical concept or main features thereof. Therefore, the described embodiments are merely examples and are not comprehensive. The examples cannot be interpreted restrictively.

Claims (10)

A lap device that supplies a lead to a battery cell so that an initial battery cell, one or more intermediate battery cells, and a final battery cell that are moved in a horizontal direction are electrically connected, and when the lead is supplied to the battery cell, A jig is supplied to the upper part of the battery unit, and the bonding device includes: a wire supply section for supplying the wire; a wire extraction section for holding the front end of the wire for extraction; and a wire clamping section for holding the extracted A front end and a rear end of the wire; a wire cutting section that cuts the rear end of the wire being held; a clamp holding section for holding the clamp; and a clamp driving section toward the battery cell. The wire holding portion and the clamp holding portion are transferred at an upper portion, wherein the wire holding portion includes a first clamp, a second clamp, and a third clamp, the first clamp, the second clamp The tongs and the third tongs are arranged downstream of the wire supply part in a spaced manner in order to hold the wires; wherein the first tongs and the second tongs hold the first battery that is being transferred toward the first battery. Unit supplied Wire, the first clamp and the third clamp clamp the wires supplied to the one or more intermediate battery cells transferred after the first battery cell, and the second clamp and the third clamp clamp the cables The wire supplied by the last battery cell transferred. The bonding device according to item 1 of the patent application scope, wherein the clamp holding portion includes a clamp clamp which clamps and supplies the clamp so as to supply the lead wire to the battery cell. The fixture and the lead are placed on the battery cell together. The overlap device according to item 1 of the scope of the patent application, wherein the wire clamping portion includes a clamp, and the clamp clamps the wire by moving left and right. The bonding device according to item 1 of the scope of patent application, wherein the wire supply section includes a supply unit which unwinds and provides a wound wire. The bonding device according to item 1 of the patent application scope, wherein the wire cutting portion includes a cutting unit that cuts the wire unwound from the wire supply portion. The overlapping device according to item 5 of the patent application scope, wherein the cutting unit includes a cutting blade that cuts the wire by moving left and right. The bonding device according to item 1 of the patent application scope, wherein the wire extraction section is downstream of the wire supply section and the wire cutting section, and adjusts the cutting length of the wire by forward and backward movement. The bonding device according to item 1 of the scope of patent application, wherein the bonding device further includes a battery cell supply portion, which is disposed at a side of the lead wire supply portion and supplies the battery cell to a welding section. In order to join the battery cell and the lead to each other in a state where the lead and the clamp are placed on the battery cell. A lap device that supplies a lead to a battery cell so that an initial battery cell, one or more intermediate battery cells, and a final battery cell that are moved in a horizontal direction are electrically connected, and when the lead is supplied to the battery cell, A jig is supplied to the upper part of the battery unit, and the bonding device includes: a wire supply section for supplying the wire; a wire extraction section for holding the front end of the wire for extraction; and a wire clamping section for holding the extracted A front end and a rear end of the wire; a wire cutting section that cuts the rear end of the wire being held; a clamp holding section for holding the clamp; and a clamp driving section toward the battery cell. The wire holding portion and the clamp holding portion are transferred at the upper portion, wherein the wire holding portion includes a fourth clamp and a fifth clamp, and the fourth clamp and the fifth clamp move forward and backward. The method is provided downstream of the wire supply portion, thereby clamping the wire. The overlapping device according to item 9 of the scope of patent application, wherein the fourth clamp and the fifth clamp moving forward hold the wire supplied to the first battery cell being transferred, and the fourth clamp And the fifth clamp clamps the wires supplied to the one or more intermediate battery cells transferred after the first battery cell, and the fifth clamp and the fourth clamp moving backward clamps the transferred Leads supplied by the last battery cell.