KR101508547B1 - Apparatus for heat bonding film to lead tab of secondary battery - Google Patents

Abstract

A heat bonding apparatus of a film for a lead tab of a secondary battery according to an embodiment of the present invention comprises: a strip-shaped conductive member having a width set to be continuously supplied in a first direction; first and second films cut into a set length to be supplied to an upper surface and a lower surface of the conductive member respectively in a second direction perpendicularly intersecting with the first direction; a bonding unit bonding the first and the second films to the upper surface and the lower surface of the conductive member respectively so that the first and the second films face each other; and a shape restoring unit installed downstream of the bonding unit, and removing heat distortion by cooling the conductive member bonded with the first and the second films. At least one of the bonding unit and the shape restoring unit includes: a base frame having a flat installation surface perpendicular to the first direction; a sliding rail installed on the installation surface in a direction perpendicular to the first direction and the second direction; and a jig unit contacted to and supporting the upper surface and the lower surface of the conductive member, or the first and the second films as moved along the sliding rail.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a film heat-

Disclosure of the Invention Disclosure of the Invention The present invention relates generally to a film heat-sealing apparatus for a secondary battery lead tab, and more particularly to a film heat-sealing apparatus for secondary battery lead taps which alleviates defects that occur during a process of thermally fusing a film to a conductive member in a strip- The present invention relates to a film heat-sealing apparatus for a secondary battery lead tab.

Herein, the background art relating to the present invention is provided, and they are not necessarily referred to as known arts.

2. Description of the Related Art [0002] Recently, portable electronic devices such as video cameras, portable phones, and portable laptops have been made lighter and more sophisticated, and accordingly, much research has been conducted on secondary batteries used as power sources for driving such devices. Nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, and lithium secondary batteries are mainly used in such batteries.

The lead tab is used as a connection terminal of an external circuit for driving an electronic product using such a secondary battery. To this end, the lead tab is connected to the electrode of the secondary battery, and a film made of resin is thermally fused to the conductive member to seal and insulate the secondary battery from the case.

Particularly, in recent years, the film is thermally fused to a conductive member having a large dimension in accordance with the tendency of the size of the lead tab to increase. In this case, unlike the conventional lead-tab manufacturing process, since it is necessary to process by injecting high heat, the quality of the lead tab is lowered due to the generation of bubbles in the film-joined portion and the heat shrinkage after manufacturing.

FIG. 1 is a schematic view of a conventional secondary battery. FIG. 2 is a view showing a separated conductive member in FIG. 1. Referring to FIG. 1, the secondary battery includes a battery unit 10, And a pouch 20 having a receiving space in which the pouch 20 is accommodated.

One end of the positive electrode terminal 11a and one end of the negative electrode terminal 11b are electrically connected to the electrode plates 11a and 11b of the battery unit 10, The positive electrode tab 13 and the negative electrode tab 14 are matched with each other and their ends are connected to each other by welding or the like and the other end of the positive electrode tab 13 and the negative electrode tab 14 is connected to the pouch And is exposed to the outside of the sealing portion 21 formed on the edge side of the base 20.

Each of the positive electrode tab 13 and the negative electrode tab 14 constitutes a lead tab (also referred to as "terminal tab or electrode tab") by attaching a film 15 on both sides thereof, 15 function not only to prevent leakage of the electrolyte filled in the pouch 20 but also to exhibit an insulating function.

The conductive member is bonded to the metal material (for example, Al) of the positive electrode tab 13 and the metal material (for example, Ni) of the negative electrode tab 14, The cathode terminal 11a and the cathode terminal 11b are connected to each other by a welding method or the like.

3 and 4 are schematic views of a conventionally proposed secondary battery lead-tab film fusing device. Referring to FIG. 3, the conductive member supply reel 22, the conductive member supply reel 22, An input side conductive member transferring portion 30 for transferring the conductive member 12 from the input side conductive member transfer portion 30 while controlling the conductive member 12 to have a predetermined pitch and a conductive member supply reel 22 in the downstream direction of the conductive member drawn out from the input side conductive member transfer portion 30, Film supply reels 52a and 52b disposed vertically corresponding to each other and wound with the films 14a and 14b and films for transporting the films 14a and 14b from the film supply reels 52a and 52b at a predetermined pitch The films 14a and 14b supplied from the conveying unit 50 are vacuum-adsorbed and cut by a predetermined length so that the cut films 14a and 14b are supplied from the conductive member transferring unit 30 The upper surface of the conductive member and the lower surface A first fusing member 70 for fusing the films 14a and 14b attached to the upper and lower surfaces of the conductive member 12 at a first temperature, 41a, 41b) of the first fusing member (41a, 41b) and the first fusing member (41a, 41b) are fused at a second temperature relatively higher than the first temperature A conductive member 12 is disposed so as to fuse the film welded by the second fusing members 43a and 43b at a third temperature relatively higher than the second temperature, (45a, 45b) disposed downstream of the second fusing members (43a, 43b) in the direction in which the first fusing members (45a, 45b) are transported to the conductive member (12) The shape restoring members 80a and 80b for removing the deformations generated in the process, the third fusing members 45a and 45b, And an output side conductive member transferring part 90 for transferring the conductive member 12 to which the turf film is welded at a predetermined pitch. On the other hand, on the downstream side of the output-side conductive member feeder 90, a side cutting portion and a conductive member 12 for cutting both ends of the films 14a and 14b attached to the upper and lower surfaces of the conductive member 12, And a conductive member cut section cut to a length meeting the standard.

However, in the above-described conventional secondary battery lead tap film fusing apparatus, in order to thermally fuse the films 14a and 14b to the upper and lower surfaces of the conductive member 12 or to alleviate the physical strain due to external force or heat, Like members 41a and 41b, second fusing members 43a and 43b, third fusing members 45a and 45b and shape restoring members 80a and 80b are vertically moved up and down. The fusing of the conductive member 12 and the films 14a and 14b is performed properly when the two fusing members 41a and 41b and the shape restoring members 80a and 80b corresponding to each other can not be brought into contact with each other And the defect rate is increasing. This is due to an error generated in the process of raising and lowering the first fusing member 41a and the first fusing member 41b that is different from the first fusing member 41a.

An object of the present invention is to provide a film heat-sealing apparatus for a rechargeable battery lead tab having a conductive member and a lifting structure that minimizes defects of the lead tabs by accurately fitting the fusing member and the shape restoring member up and down at the upper and lower portions of the film, .

In order to solve the above problems, an apparatus for thermally fusing a secondary lead tab of a secondary battery according to an embodiment of the present invention includes: a strip-shaped conductive member having a predetermined width continuously fed in a first direction; First and second films cut into predetermined lengths respectively supplied to upper and lower surfaces of the conductive member in a second direction orthogonal to the first direction; A fused portion joining the first and second films to the upper surface and the lower surface of the conductive member, respectively, so that the first and second films are brought into contact with each other; And a shape restoring unit disposed downstream of the fused portion and cooling the conductive member to which the first and second films are bonded to remove thermal deformation, wherein at least one of the fused portion and the shape restoring portion includes: A base frame having a flat mounting surface perpendicular to the first direction; A sliding rail installed on the mounting surface in a direction orthogonal to the first direction and the second direction; And a jig unit which is selectively moved along the sliding rail and contacts the upper surface and the lower surface of the conductive member or the first and second films.

In the apparatus for fusing a secondary battery lead taps according to an embodiment of the present invention, the jig unit includes a conductive member having a contact surface facing the upper surface and the lower surface of the conductive member and facing each other symmetrically with respect to the conductive member, 1,2 jig blocks; A first and a second jig brackets each having the first and second support blocks coupled to one side and the other side coupled to the sliding rail; And a driving member for applying a driving force to move the first and second jig brackets up and down along the sliding rails.

The first and second jig blocks may be provided to support the first and second films. Alternatively, the first and second jig blocks may be provided to support the first and second films, So as to simultaneously support the upper surface and the lower surface of the member.

The first and second jig blocks may include first and second film jig blocks that are in contact with the first and second films, respectively. And first and second conductive jig blocks provided on an outer edge of the first and second film jig blocks to respectively support upper and lower surfaces of the conductive member, The first and second conductive member jig blocks may be independently movable.

The first and second jig brackets and the driving member may be disposed between the first and second film jig blocks and the first and second conductive jig members, Blocks may be provided independently of each other.

In the film heat-fusing device for secondary battery lead taps according to an embodiment of the present invention, the fused portion may be formed by a first heat-applying member for applying heat to the conductive member at a first temperature, A fused portion; A second fused portion provided downstream of the first fused portion and applying heat to the first and second films at the same temperature and simultaneously applying heat to the conductive member at the first temperature; And a third fused portion provided downstream of the second fused portion and applying heat to the conductive member at a second temperature higher than the first temperature.

In the film thermal fusing device for secondary battery lead taps according to an embodiment of the present invention, the first, second, and third fused portions may be formed on the both sides of the first and second films in the width direction of the first and second films, And may be provided by applying heat to the conductive member.

In the film thermal fusing device for secondary battery lead taps according to an embodiment of the present invention, the shape restoring portion is provided downstream of any one of the second and third fused portions, and pressure is applied to the first and second films And cooling the conductive member or the first and second films.

In the apparatus for fusing a secondary lead tab tap for a secondary battery according to an embodiment of the present invention, heat is applied to the conductive member at a third temperature and supplied to the upper surface and the lower surface of the conductive member, The first and second films being cut to a predetermined length to be cut.

In the apparatus for fusing a secondary battery lead taps according to an embodiment of the present invention, the first and second films are provided downstream of the shape restoring portion, and the first and second films have a predetermined length in the second direction. The side cutting portion has cut portions provided at both ends of the first and second films, and the cut portion is provided to adjust the gap in the second direction.

According to the apparatus for welding a secondary battery lead taps according to an embodiment of the present invention, since the jig unit that is brought into contact with each other in the vertical direction and joins the film to the conductive member is driven by the sliding rail, As a result, the bonding surfaces of the jig blocks become horizontal, and the bonding surfaces in the up-and-down direction are accurately brought into contact with each other, thereby making it possible to greatly reduce bonding defects.

According to the apparatus for fusing a film of secondary battery lead taps according to an embodiment of the present invention, since the jig unit is provided on the base frame provided vertically, a clearance space is formed in the right and left side directions of the jig unit, The jig unit can be easily installed, and the access to the jig unit can be facilitated.

FIG. 1 is a schematic view of a conventional secondary battery,
FIG. 2 is a view showing the lead tabs separated in FIG. 1,
FIG. 3 is a schematic view of a conventionally proposed secondary battery lead-tab film fusing device,
Figure 4 is a schematic view of the film supply in Figure 3,
FIG. 5 is a block diagram schematically showing a process of a film thermal fusing apparatus for rechargeable battery lead taps according to an embodiment of the present invention. FIG.
Figure 6 conceptually illustrates a conductive member feeder in Figure 5,
FIG. 7 is a conceptual view of the film supply unit in FIG. 5,
Fig. 8 is a conceptual view of the fused portion in Fig. 5,
FIG. 9 is a view showing an example of the fused portion of FIG. 8 in detail;
10 is an exploded view of the jig block in FIG. 9,
FIG. 11 is a conceptual illustration of the shape restoring unit in FIG. 5, and FIG.
12 is a view showing an example of a side cutting portion in FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a secondary battery lead tab film fusing device according to the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, the inventor could properly define the term concept to describe its invention in the best possible way, so that the terms and words used in the specification and claims are to be construed as limited to a conventional or dictionary meaning And should be construed as meaning and concept consistent with the technical idea of the present invention.

A secondary battery lead tap film fusing device according to an embodiment of the present invention is a device for fusing and bonding a film to a conductive member (e.g., metal) Is an automated device used to create lead tabs for positive or negative electrodes.

5 is a block diagram schematically showing a process of a secondary battery lead tab film fusing device according to an embodiment of the present invention.

Referring to FIG. 5, the apparatus for thermally fusing a secondary lead tab of a secondary battery according to the present exemplary embodiment includes a conductive member supplying unit 110, a film supplying unit 120, a fused unit 130, 140, a pitch transfer part 150, a side cutting part 160, a pressing support part 170 functioning as a stopper, and a cutting part 180. Through these steps, a lead tapped single part is produced.

Alternatively, a method of removing the cutting portion 180 and winding the conductive member M to which the film F is fused at regular intervals may be adopted.

The conductive member M is preferably made of a metal as a base material for manufacturing the lead taps. Aluminum (Al) may be used as the anode metal material, and nickel (Ni) may be used as the cathode metal material.

The film mainly uses a PP (polypropylene) film.

FIG. 6 is a conceptual view of the conductive member feeder in FIG. 5; FIG.

Referring to FIG. 6, the conductive member supply unit 110 is a device for continuously supplying a strip-shaped conductive member having a predetermined width in its longitudinal direction.

To this end, a conductive member feeding reel 111 wound with a conductive member M is provided, and the conductive member M is unwound and supplied by a predetermined length. Here, the length to which the conductive member M is supplied may be controlled by the rotation control or pitch transfer unit 150 of the conductive member supply reel 111. [

Here, it is possible to further include a bending part 113 composed of a plurality of rollers for correcting warping generated when the conductive member M is supplied from the conductive member supply reel 111. [

Further, the preheating unit 115 for preheating the conductive member M in advance before the film F is thermally fused to the conductive member M may be further provided. The preheating unit 115 may be configured to perform preheating by passing the conductive member M through the interior of the preheating block heated by the built-in heater.

FIG. 7 is a conceptual view of the film supply unit in FIG. 5; FIG.

7, the film supply unit 120 is disposed on the upper surface of the conductive member M in a direction perpendicular to the direction in which the conductive member M is supplied (the first direction in FIG. 5) And the first film (F1) and the second film (F2) cut to a length set respectively on the lower surface and the lower surface in a predetermined time period.

The film supply unit 120 includes a first film supply reel 121 and a second film supply reel 121 on which the first film F1 and the second film F2 are wound so as to supply the film F to the upper and lower sides of the conductive member M, The first film F1 and the second film F2 are transferred from the film supply reel 122 to a predetermined pitch and the first film F1 and the second film F2 are vacuum-adsorbed and cut, May be provided so as to be transferred and positioned at predetermined positions on the upper and lower surfaces of the member (M).

The film feeder 120 distributes the supplied first film F1 and the second film F2 to the upper and lower sides of the conductive member M so as to supply the upper and lower sides thereof, And a film dispensing guide 123 having a film 123a.

A middle spacer (not shown) for simultaneously transferring the first film (F1) and the second film (F2) guided by the vertical distribution and the horizontal movement through the film distribution guide 123 to transport the pitch in the direction of the conductive member 124a may be included.

In addition to the final guide box positioned above and below the conductive member side with respect to the first film F1 and the second film F2 which are pitch-transferred by the film transfer chuck 124, the ease of cutting the film F And a film discharge guide 125 having upwardly and downwardly distributed guide through-holes 125a for imparting the film discharge guide 125a.

On the other hand, a large noise may be generated during the vacuum adsorption process of the film F, and a silencer may be further provided to prevent the noise.

Fig. 8 is a view conceptually showing a fused portion in Fig. 5;

8, the fused portion 130 is formed by joining the first film F1 and the second film F2 to the upper surface and the lower surface of the conductive member M, respectively, and the first film F1 and the second film F2, (F2) are brought into contact with each other.

The fused portion 130 has a pair of jig blocks 131 and 231 which are located in the vertical direction of the conductive member M on which the film F is disposed and have a built-in heater. And the second film (F2) is fused to the conductive member (M).

FIG. 9 is a view showing an example of the fused portion of FIG. 8 in detail.

9 is a top view showing the top and bottom symmetrically, wherein symmetrical configurations of the upper and lower portions are denoted by the same reference numerals, and "1" is assigned to the top of the upper configuration and " The corresponding subordinate structure is distinguished by being prefixed with '2'.

9, the fused portion 130 includes a base frame 133, sliding rails 134a, 134b, 234a, and 234b, and jig units 137a and 237a.

The base frame 133 is provided so as to have a flat mounting surface orthogonal to the longitudinal direction to which the conductive member M is supplied. The mounting surface is disposed to face the conveying direction of the conductive member M, and the base frame 133 may be provided as a long plate in the vertical direction.

Here, it is preferable that the base frame 133 is provided with a conductive member feed opening 133a at its center so that the conductive member M can be supplied in the thickness direction thereof.

The conductive member supply opening 133a may be provided with a pair of rollers for guiding the supply of the conductive member M. [

On the other hand, the sliding rails 134a, 134b, 234a, and 234b are coupled to the mounting surface of the base frame 133 and extend in a direction orthogonal to both the transport direction of the conductive member M and the supply direction of the film F And is vertically coupled with the base frame 133.

The sliding rails 134a, 134b, 234a, and 234b are not limited to the one provided at the center of the mounting surface of the base frame 133, and the number of the mounting rails can be adjusted by the designer. If three or more sliding rails are provided, the distance between the sliding rails is preferably the same.

The jig units 137a and 237a are selectively moved along the sliding rails 134a and 134b and 234a and 234b to fuse the first and second films F to the upper and lower surfaces of the conductive member M. [

Each of the jig units 137a and 237a includes first and second jig blocks 131a and 131b and first and second jig brackets 135a and 135b and driving members 136a and 136b, 236a, 236b.

The first and second jig blocks 131a, 131b, 231a and 231b have contact surfaces 131c and 231c facing the upper and lower surfaces of the conductive member M and facing each other with reference to the conductive member M .

The contact surfaces 131c and 231c are formed on the upper surface and the lower surface of the conductive member M or the upper surface and the lower surface of the first and second films F and M and the first and second films F As shown in FIG.

Each of the first and second jig brackets 135a, 135b, 235a and 235b is coupled to one side of the first and second jig blocks 131a, 131b, 231a and 231b and the other side thereof is connected to the sliding rails 134a, 134b, 234b so that the contact surfaces 131c, 231c of the first and second jig blocks 131a, 131b, 231a and 231b face the upper surface and the lower surface of the conductive member M, respectively.

The driving members 136a, 136b, 236a, and 236b are configured to apply a driving force to move the first and second jig brackets 135a, 135b, 235a, and 235b up and down along the sliding rails 134a, 134b, 234a, and 234b , And an air cylinder. In this case, a silencer may be additionally provided to reduce noise generated during operation of the air cylinder.

Needless to say, an electric cylinder capable of precise position control by a servomotor can be provided although it is expensive.

FIG. 10 is a view showing the jig block shown in FIG. 9 in an exploded view.

Referring to FIG. 10, the first and second jig blocks 131a, 131b, 231a, and 231b may include film jig blocks 131b and 231b and conductive jig blocks 131a and 231a, have.

Here, the conductive member jig blocks 131a and 231a are provided on the outer edge, that is, the rims of the film jig blocks 131b and 231b, and each of them is independently elevated and lowered. Specifically, the conductive member jig blocks 131a and 231a are vertically opened to correspond to the shapes of the film jig blocks 131b and 231b, and the film jig blocks 131b and 231b are electrically connected to the conductive member jig blocks 131a And 231a in the vertical direction.

Thus, the operation of the heater incorporated in the film jig blocks 131b and 231b and the conductive member jig blocks 131a and 231a can be independently controlled. That is, it is possible to apply heat only to the conductive member (M), and to apply pressure only to the film (F).

Only the conductive member M or the film F can be contacted by driving only the film jig blocks 131b and 231b or the conductive member jig blocks 131a and 231a up and down.

Here, in the case of contacting only the conductive member M, the conductive member jig blocks 131a and 231a are brought into contact with the conductive member M on both sides with the film F interposed therebetween.

For this, not only the jig bracket and the driving member are separately provided in the film jig blocks 131b and 231b and the conductive member jig blocks 131a and 231a, but also a sliding rail for guiding the jig bracket is separately provided.

On the other hand, a plurality of fused portions 130 may be provided in the conveying direction of the conductive member (M). At this time, the plurality of fused portions 130 can set optimal fusion conditions by making difference in the heating temperature, the object to be contacted, the contact time, and the like.

For example, the fused portion 130 may be provided with first, second, and third fused portions in the conveying direction of the conductive member M.

The first fused portion is provided to apply heat to the conductive member (M) at a first temperature while applying pressure to the first and second films (F). The first temperature is preferably 140 ° C to 160 ° C.

The second fused portion is provided to apply heat to the first and second films (F) at a first temperature and apply heat to the conductive member (M) at a first temperature.

The third fused portion is provided to apply heat to the conductive member (M) at a second temperature higher than the first temperature. Here, the second temperature is preferably 170 占 폚 to 190 占 폚.

Here, the first fused portion is for preventing air bubbles from being generated between the film F and the conductive member M.

FIG. 11 is a conceptual illustration of the shape restoring unit in FIG.

Referring to FIG. 11, the shape restoring unit 140 may be configured such that the first and second films F are bonded to the conductive member M to which the first and second films F are bonded, in order to remove physical strain such as wrinkles, And cooling.

The shape recovery unit 140 has the same structure as that of the fused portion 130 described above except that the heater is embedded in the interior of the jig blocks 141 and 241 but the conductive first and second films F, There is only a difference in that a configuration for preventing the shape restoring unit 140 from being overheated by the elastic member M is added.

Specifically, a plurality of cooling holes 141a and 241a penetrating the jig blocks 141 and 241 are formed to prevent the overheat of the shape recovery unit 140 to circulate the cooling air and enlarge the heat transfer area. Forced cooling can also be applied by injecting compressed air into the cooling holes 141a and 241a.

The jig blocks 141 and 241 are usually made of aluminum. When the jig blocks 141 and 241 are in direct contact with the conductive member M to which the first and second films F are bonded during the cooling process, F or the conductive member M is often damaged. To prevent this, the foamed silicon 141b (or 141b) on the surface of the jig block 141 or 241, which is in contact with the conductive member M to which the first and second films F are bonded, , And 241b are preferably coated.

In other respects, the description of the fused portion 130 will be omitted and omitted here.

Meanwhile, the shape restoring part 140 is generally disposed downstream of the fused portion 130, but it is needless to say that the shape restoring part 140 can be disposed between various processes by the designer's choice.

For example, in the case where a plurality of fused portions 130 are provided, it is very difficult to improve the thermal deformation after a plurality of fused portions 130 are generated. Therefore, It is preferable to arrange the shape recovery unit 140.

12 is a view showing an example of a side cutting portion in FIG.

12, the side cutting portion 160 is provided on both sides of the film F with respect to the conductive member M to which the film F having passed the fusion portion 130 and the shape recovery portion 140 is fused. To perform normalized cutting of the film (F).

The side cutting portion 160 is provided with a cutting base frame 163 corresponding to the base frame 133 of the fused portion 130. The cutting base frame 163 is provided with a conductive member The two cutouts 161 and 162 are respectively coupled to the receiving grooves 161a and 162a opened in the horizontal direction in which the opposite ends of the film F are received, And cutters 161b and 162b selectively protruding in the vertical direction in the grooves 161a and 162a.

On the other hand, in this example, the two cut portions 161 and 162 are provided so as to adjust the interval therebetween. To this end, the two cutouts 161 and 162 are provided movably along a guide rail 164 installed horizontally in the cutter base frame 133.

The side cutting portion 160 preferably further includes a scale 165 scaled in the horizontal direction on the cutter base frame 133 or the guide rail 164 so as to confirm the interval length between the two cutouts 161 and 162 Do.

Meanwhile, a pitch transfer unit 150 is provided between the shape recovery unit 140 and the side cutting unit 160 in the apparatus 110 for fusing a secondary lead tab of a secondary battery according to an embodiment of the present invention.

The pitch transfer unit 150 is for transferring a pitch of the conductive member by a predetermined distance in the process advancing direction. The pitch transfer unit 150 includes a transfer chuck which is disposed so as to hold the conductive member in a lateral direction, a pitch transfer unit And a driving unit.

In the apparatus for thermally fusing a secondary battery lead taps 100 according to an embodiment of the present invention, a pressure supporting portion 170 serving as a stopper is provided downstream of the side cutting portion 160.

The pressing support part 170 temporarily holds the conductive member M conveyed by the pressing member that is driven in the vertical direction and fixes the conductive member M in the process of fusion, So as to prevent the conductive member (M) from being stretched or contracted.

Meanwhile, in the apparatus for thermally fusing a secondary battery lead taps 100 according to an exemplary embodiment of the present invention, a step of aligning the side cutting portions 160 may be further provided.

This is for aligning and arranging the conductive members M in the conveying direction by supporting the left and right end faces of the conductive member M before and after the side cutting portion 160. After the alignment of the conductive member M in this way, Cutting both ends of the film F welded to the member M allows left and right balanced film F to be left in both left and right directions of the conductive member M and realizes good quality standardization.

In the apparatus for thermally fusing a secondary lead tab of a secondary battery according to an embodiment of the present invention, the conductive member (M) and the film (F) are fused to each other between the conductive member supply unit (110) A step of cleaning the upper surface and the lower surface of the conductive member M may be further provided. Here, as the cleaning means, alcoholic cotton or ultrasonic waves can be used.

The film F is bonded to the conductive member M between the film supply unit 120 and the fused portion 130 in the film thermal fusing apparatus 100 of the secondary battery lead tab according to an embodiment of the present invention. A step of preliminarily connecting the wafer to the wafer can be further provided.

This applies heat to the conductive member M at a third temperature lower than the fusion temperature of the fused portion 130 so that the first and second films F are brought into contact with the upper and lower surfaces of the conductive member M. [

Here, the third temperature is preferably 120 ° C to 140 ° C.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are merely exemplary and explanatory and are intended to be illustrative of the present invention, To the extent possible.

Claims (10)

A strip-shaped conductive member having a predetermined width continuously fed in the first direction;
First and second films cut into predetermined lengths respectively supplied to upper and lower surfaces of the conductive member in a second direction orthogonal to the first direction;
A fused portion joining the first and second films to the upper surface and the lower surface of the conductive member, respectively, so that the first and second films are brought into contact with each other; And
And a shape restoring unit disposed downstream of the fused portion and cooling the conductive member to which the first and second films are bonded to remove thermal deformation,
Wherein at least one of the fused portion and the shape restoring portion comprises:
A base frame having a flat mounting surface perpendicular to the first direction;
A sliding rail installed on the mounting surface in a direction orthogonal to the first direction and the second direction; And
And a jig unit which is selectively moved along the sliding rail and is held in contact with the upper surface and the lower surface of the conductive member or in contact with the first and second films,
The jig unit includes:
First and second jig blocks facing the upper and lower surfaces of the conductive member, respectively, and having contact surfaces symmetrically facing each other with respect to the conductive member;
A first and a second jig brackets each having the first and second support blocks coupled to one side and the other side coupled to the sliding rail; And
And a driving member for applying a driving force to move the first and second jig brackets up and down along the sliding rail,
In the first and second jig blocks,
First and second film jig blocks contacting the first and second films; And
And first and second conductive member jig blocks provided on an outer edge of the first and second film jig blocks to respectively support an upper surface and a lower surface of the conductive member,
Wherein the first and second film jig blocks and the first and second conductive member jig blocks are independently moved from each other,
The fused portion
A first fused portion applying heat to the conductive member at a temperature of 140 ° C to 160 ° C under a pressure applied to the first and second films;
A second fusing unit disposed downstream of the first fused unit and applying heat to the first and second films at a temperature of 140 ° C to 160 ° C and applying heat to the conductive member at a temperature of 140 ° C to 160 ° C, part; And
And a third fused portion provided downstream of the second fused portion and applying heat to the conductive member at a temperature of 170 ° C to 190 ° C,
The first and second films being provided downstream of the shape recovery unit and having the lengths set in the second direction around the conductive member, the first and second films being fused to the conductive member, Wherein the side cutting portion has a cut portion provided corresponding to both ends of the first and second films, and the cut portion is provided so as to be spaced apart in the second direction around the conductive member Wherein the secondary battery lead taps are made of a thermoplastic resin. delete The method according to claim 1,
In the first and second jig blocks,
Wherein the first and second films are provided to support the first and second films or to simultaneously support upper and lower surfaces of the first and second films and the conductive member. delete The method according to claim 1,
Wherein the first and second jig brackets and the driving member comprise:
Wherein the first and second conductive jig blocks are provided independently of the first and second film jig blocks and the first and second conductive member jig blocks, respectively. delete The method according to claim 1,
The first, second,
Wherein heat is applied to the conductive member at both sides of the first and second films in the width direction of the first and second films. The method according to claim 1,
The shape-
The second and third fused portions,
Wherein the conductive member or the first and second films are cooled while applying pressure to the first and second films. The method according to claim 1,
Wherein the first and second films cut at predetermined lengths supplied to the upper and lower surfaces of the conductive member are applied to the conductive member at a temperature of 120 ° C to 140 ° C, Wherein the lead tabs of the secondary battery lead tabs are connected to each other. delete

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