KR101820442B1 - Device for Taping Electrode Assembly of Battery Cell and Battery Cell Manufactured Using the same - Google Patents

Abstract

The present invention relates to an apparatus for attaching an adhesive tape to an outer surface of an electrode assembly having a laminated structure composed of an anode, a cathode, and a separator interposed between the anode and the cathode, A taping portion including a first pressure bar having a first pressure pad and a second pressure pad for fixing a lower portion of the non-adhesive surface of the adhesive tape; A clamp for pulling the adhesive tape so that the non-adhesive surface of the adhesive tape is positioned on one side of the first press table and the second press table; And a transfer unit for transferring the first presser bar and the second presser bar,
Wherein the first pushing member and the second pushing member are formed such that the first fixed end and the second fixed end form a step with respect to the electrode assembly.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electrode assembly taping device for a battery cell, and a battery cell manufactured using the taping device,

The present invention relates to an electrode assembly taping apparatus for a battery cell and a battery cell manufactured using the taping apparatus.

In recent years, the demand for environmentally friendly alternative energy sources has become an indispensable factor for the future, as the increase in the price of energy sources due to depletion of fossil fuels and the interest in environmental pollution are amplified. Various researches on power generation technologies such as nuclear power, solar power, wind power, and tidal power have been continuing, and electric power storage devices for more efficient use of such generated energy have also been attracting much attention.

Particularly, as technology development and demand for mobile devices are increasing, the demand for batteries as energy sources is rapidly increasing, and accordingly, a lot of researches on batteries that can meet various demands have been conducted.

Typically, in terms of the shape of a battery, there is a high demand for a prismatic secondary battery and a pouch-type secondary battery which can be applied to products such as mobile phones with a small thickness, and has advantages such as high energy density, discharge voltage, There is a high demand for lithium secondary batteries such as lithium ion batteries and lithium ion polymer batteries.

The secondary battery includes a cylindrical battery and a prismatic battery in which the electrode assembly is housed in a cylindrical or rectangular metal can according to the shape of the battery case, and a pouch type battery in which the electrode assembly is housed in a pouch-shaped case of an aluminum laminate sheet .

In particular, in recent years, a pouch-shaped battery having a structure in which a stacked or stacked / folded electrode assembly is embedded in a pouch-shaped battery case of an aluminum laminate sheet has attracted much attention due to low manufacturing cost, small weight, And its usage is gradually increasing.

Also, the secondary battery is classified according to the structure of the electrode assembly having the positive electrode, the negative electrode, and the separator interposed between the positive electrode and the negative electrode. Typically, the long battery- A stacked (stacked) electrode assembly in which a plurality of positive electrodes and negative electrodes cut in a predetermined size unit are sequentially stacked with a separator interposed therebetween, the jelly-roll type (wound type) electrode assembly having a structure in which a separator is interposed; And the like.

In recent years, in order to solve the problems of the jelly-roll type electrode assembly and the stacked electrode assembly, an electrode assembly having an advanced structure of a jelly-roll type and a stack type mixed type, A stack / folding type electrode assembly having a structure in which a bi-cell or a full cell stacked in an intervening state is sequentially wound while being placed on a separation film has been developed.

One of the major research tasks in such secondary batteries is to improve safety. For example, a secondary battery can have a high temperature and / or high temperature inside the battery that can be caused by an abnormal operating condition of the battery, such as an internal short circuit, an overcharged condition exceeding an allowable current and voltage, exposure to a high temperature, The explosion of the battery may be caused by high pressure.

In the case of the stacked electrode assembly, there is a high possibility that short-circuiting between the electrodes is caused by movement of the electrodes about the separation membrane when the battery is dropped or an external impact is applied. Accordingly, A fixing adhesive tape for fixing the electrode assembly may be added.

FIG. 1 is a schematic view showing a structure of a stacked electrode assembly in which an adhesive tape is attached to an outer circumferential surface of a conventional electrode assembly. FIG. 2 shows a stacked electrode assembly in which a fixing adhesive tape is attached to the outer circumferential surface of FIG. A schematic diagram showing an enlarged structure of the surface is shown.

1 and 2, the electrode assembly 50 includes an anode 10, a cathode 20, and a separator 30 interposed between the anode 10 and the cathode 20 Two adhesive tapes 41, 42, 43, and 44 are respectively attached to the outer circumferential surfaces of the electrode assemblies 50 facing each other. The electrode assembly 50 was manufactured by adding a fixing adhesive tape to a part of the outer circumferential surface of the electrode assembly in order to prevent the disposition of the anodes, cathodes, and separators from being shifted.

However, in such a structure, the outer peripheral surface of the separation membrane is often irregularly bent during the process of attaching the fixing adhesive tape, and the irregularly bent separation membrane may cause some single layer of the electrode assembly to protrude, There is a problem that damage may be caused to the inside of the battery cell, such as causing a phenomenon to deteriorate the quality, thereby increasing the defective rate of the product.

In order to solve this problem, conventionally, in order to solve such a problem, the separating film of the electrode assembly is preliminarily bent or bent before the fixing mounting member is attached, or after the adhesive tape of the separating film which is unevenly bent is detached, There is a problem that additional manpower and process time are required.

Therefore, there is a high need for a technique capable of fundamentally solving such problems.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art and the technical problems required from the past, and the first pushbands and the second pushbands according to the present invention have the first fixed end and the second fixed end, It is possible to add the adhesive tape so that the outer periphery surplus portion of the separation membrane of the electrode assembly is constantly bent upward or downward. Therefore, it is possible to minimize the defective rate of the battery, And to provide an electrode assembly taping apparatus that can be manufactured.

It is a further object of the present invention to provide an electrode assembly in which an outer peripheral portion surplus portion of the separator of the electrode assembly is bent in a predetermined direction so that it can be easily accommodated in a battery case, The present invention also provides a battery cell having improved safety at high temperature by preventing the occurrence of an internal short circuit by shrinking the separator even under a high temperature environment by stably fixing the laminate structure of the electrode assembly by bonding and fixing the battery.

In order to achieve the above object, there is provided an apparatus for attaching an adhesive tape to an outer surface of an electrode assembly having a laminated structure composed of a cathode, a cathode, and a separator interposed between the anode and the cathode,

A first pressure bar provided with a first fixed end for fixing the upper portion of the non-adhesive surface of the adhesive tape, and a second pressing surface provided with a second fixed end for fixing the lower portion of the non- A taping portion including a base;

A clamp for pulling the adhesive tape so that the non-adhesive surface of the adhesive tape is positioned on one side of the first press table and the second press table; And

A conveying unit for conveying the first presser bar and the second presser bar;

And,

The first pushing member and the second pushing member are structured such that the first fixed end and the second fixed end form a stepped portion at positions relative to the electrode assembly.

As described above, the electrode assembly taping device according to the present invention is configured such that the first fixed end and the second fixed end form a stepped portion, thereby continuously adhering from one end of the upper or lower end of the outer surface of the electrode assembly to one end of the opposite end It is possible to attach an adhesive tape so that the outer circumferential surplus portion of the separation membrane is bent in the same direction.

Specifically, the first fixed end and the second fixed end may be structured such that the inclined surfaces of the adhesive tapes fixed to the fixed ends are stepped to each other with an angle of 50 to 80 degrees with respect to a direction perpendicular to the paper surface .

When the inclined surface is at an angle of less than 50 degrees, it is not possible to form a step at a distance that makes it possible to constantly bend the outer surface of the separating membrane in an intended direction. If the inclination exceeds 80 degrees, , It is necessary to use a longer adhesive tape, and thus the adhesive tape may be wasted.

In the electrode assembly taping apparatus according to the present invention, the adhesive tape may be attached so that the outer peripheral surplus portion of the separation membrane is bent upward or downward.

Each of the first pushing piece and the second pushing piece of the present invention includes at least one protrusion for closely attaching the adhesive tape to the outer surface of the electrode assembly and closely adhering the adhesive tape to the outer surface of the electrode assembly The projections of the first presser bar and the protrusions of the second presser bar may have a structure protruded to face each other with respect to the electrode assembly.

In one specific example, the taping portion advances toward the electrode assembly in an upward or downward diagonal direction with respect to a direction perpendicular to the paper surface and approaches one side of the electrode assembly, The adhesive tape can be adhered to the electrode assembly by closely advancing to the uppermost surface and the lowermost surface of the assembly.

The electrode assembly taping device according to the present invention is characterized in that the taping portion approaches the one side of the electrode assembly by battery cells in the upward or downward diagonal direction so that the surplus portion of the separation film protruding from one side of the electrode assembly faces upwards or downwards It can be bent constantly.

The taping portion advancing in the downward diagonal direction can attach the adhesive tape sequentially to the uppermost surface, the outer surface, and the lowermost surface of the electrode assembly, and the taping portion advancing in the upward diagonal direction can sequentially attach the adhesive tape to the electrode assembly The outer surface, and the top surface.

Specifically, the diagonal direction may range from 30 degrees to 60 degrees with respect to a direction perpendicular to the paper. In the case where the diagonal direction is less than 30 degrees, the angle of bending of the surplus portion may become irregular, and the surplus portion may be irregularly formed because the surplus portion of the outer circumferential surface of the separation membrane is not sufficient to bend the upward or downward direction as intended by the present invention. It is not easy to approach one side of the taping-side electrode assembly, which is not preferable.

In one specific example, the first fixed end and the second fixed end fix the adhesive tape by an adsorption method. Specifically, the first fixed end and the second fixed end are formed with an adsorption port for adsorbing the adhesive tape . ≪ / RTI >

The attraction force formed on the suction port may be such that the adhesive tape fixed to the first fixed end and the second fixed end is separated by the adhesive force of the adhesive tape and the outer surface of the electrode assembly.

The electrode assembly taping apparatus according to the present invention may further include a cut portion for cutting one end of the adhesive tape. Specifically, the cut portion can be adhered to the lowermost surface, the outer surface, and the uppermost surface of the electrode assembly, and the adhesive tape can be adhered to the electrode assembly in such a length as to prevent the arrangement of the anodes, cathodes, The tape can be cut.

In one specific example, the adhesive tape may be a member having an adhesive applied to a film base of polyethylene (PE), polypropylene (PP), or polyethylene terephthalate (PET) And is not particularly limited as long as it can stably fix the laminate structure of the assembly and does not affect physical and chemical properties.

The present invention provides a method of adding an adhesive tape to an outer surface of an electrode assembly using the electrode assembly taping apparatus.

Specifically, in the method of adding the adhesive tape,

(a) a clamp grips one end of the adhesive tape to pull the adhesive tape and moves across one side of the tape to face the non-adhesive side of the adhesive tape;

(b) fixing the upper portion of the non-adhesive surface of the adhesive tape by the first fixing end and fixing the lower portion of the non-adhesive surface of the adhesive tape by the second fixing end;

(c) conveying the taping portion by the conveying portion so that the adhesive surface of the adhesive tape and one side of the electrode assembly face each other;

(d) the taping part advances to one side of the electrode assembly in a downward diagonal direction of the electrode assembly, and the protrusions of the taping parts are closely contacted with the uppermost surface and the lowermost surface of the electrode assembly, And the bottom surface, or

The taping portion advances to one side of the electrode assembly in an upward diagonal direction of the electrode assembly and the protrusion of the taping portion advances and sticks to the uppermost surface and the lowermost surface of the electrode assembly so that the adhesive tape sequentially reaches the lowest, ;

(e) returning the taping portion separated from the adhesive tape back to the original position from the electrode assembly;

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In the prior art, when the adhesive tape is added in one direction of the electrode assembly, the direction of bending of the plurality of separator outer circumferential surplus portions constituting the electrode assembly becomes irregular, which makes it difficult to add the contact tape.

However, the method of adding the adhesive tape according to the present invention may be such that the diagonal direction of the process (d) may range from 30 to 60 degrees with respect to the direction perpendicular to the paper surface, and in this tilted direction, When the method is applied to a taping portion having a structure in which the first fixed end and the second fixed end are stepped from each other, the outer peripheral surface surplus portion of the separation membrane can be constantly bent upward or downward, It is possible to greatly reduce the defective rate generated in the taping process by exerting complementary effects.

In addition, after the step (b), the first fixed end and the second fixed end may be further cut by using a cutter while the adhesive tape is fixed in order to cut one end of the adhesive tape.

The present invention also provides a battery cell manufactured using the electrode assembly taping apparatus,

An electrode assembly having a laminated structure composed of a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode is mounted on a storage portion of the battery case;

The separation membrane is protruded to a length longer than the anode and the cathode to form an outer circumferential surplus portion;

Wherein an adhesive tape is attached to an outer surface of the electrode assembly so as to maintain a laminated structure of the electrode assembly;

And the outer circumferential surplus portion of the separation membrane is bent in the same one direction by the adhesive tape.

Specifically, the adhesive tape may be formed so as to extend from the uppermost surface to the lowermost surface with respect to the stacking direction of the electrodes.

In addition, the length of the separation membrane surplus portion protruding from the outer circumferential surface may be 0.75 mm to 1.00 mm.

In one specific example, the electrode assembly may be a bi-cell having a separator formed at the uppermost or lowermost end thereof.

The battery case may include a cylindrical or rectangular can, and a cap mounted on the open upper end of the can, or may be a pouch case of a laminate sheet including a resin layer and a metal layer.

The battery cell according to the present invention is not particularly limited as long as it has the above-described structure. Specific examples thereof include a lithium ion battery having advantages such as high energy density, discharge voltage, and output stability, a lithium ion polymer battery And the like.

The configuration, structure, and manufacturing method of the battery cell including the lithium secondary battery are well known in the art, and a detailed description thereof will be omitted in this specification.

The present invention also provides a device including the battery cell as a power source.

Typical examples of the device include a mobile phone, a portable computer, a smart phone, a tablet PC, a smart pad, a netbook, a LEV (Light Electronic Vehicle), an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, But is not limited to these.

Since the structure of the device and the method of manufacturing the device are well known in the art, a detailed description thereof will be omitted herein.

As described above, since the first pushing member and the second pushing member according to the present invention form a structure in which the first fixed end and the second fixed end are stepped at a position relative to the electrode assembly, By adding the adhesive tape so that the excess portion is bent upwardly or downwardly uniformly, it is possible to minimize the defective rate of the battery and to manufacture the battery cell of excellent quality.

In addition, the taping portion advances in the upward or downward diagonal direction to approach one side of the electrode assembly, thereby making it possible to constantly bend the surplus portion of the separation film protruding from one side of the electrode assembly upwardly or downwardly, When such a process is applied to a taping portion having a structure in which the end and the second fixed end are stepped on each other, the defective rate generated during the taping process can be greatly reduced due to the complementary effect.

In addition, the electrode assembly according to the present invention can easily accommodate the electrode assembly in the battery case by bending the surplus portion of the outer circumferential surface of the separator, and by adhering and fixing the surplus portion of the separator to the positive electrode and the negative electrode, There is an effect of providing a battery cell improved in high-temperature safety by preventing internal short-circuiting due to shrinkage of the separator even in a high temperature environment.

1 is a schematic view showing a structure of a stacked electrode assembly in which an adhesive tape is attached to the outer circumferential surface of a conventional electrode assembly;
2 is a cross-sectional view schematically illustrating the stacked structure of the stacked electrode assembly of FIG. 1;
3 to 6 are photographs showing a process of fixing the adhesive tape of the taping portion of the electrode assembly taping apparatus according to one embodiment of the present invention;
7 is a side view and a front view schematically showing a first pressing pad and a second pressing pad of a taping portion according to an embodiment of the present invention;
8 to 10 are schematic views illustrating a process of adding an adhesive tape to an electrode assembly according to an embodiment of the present invention;
11 is a schematic side view illustrating a process of adding an adhesive tape to an electrode assembly using a taping portion according to another embodiment of the present invention;
12 is a cross-sectional view schematically showing a stacked structure of a stacked electrode assembly in which an adhesive tape is added using the taping portion of FIG. 11;
13 is a photograph of an electrode assembly taping apparatus according to one embodiment of the present invention, which adds an adhesive tape to an electrode assembly;
14 is a plan view of an electrode assembly with an adhesive tape according to one embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings according to the embodiments of the present invention, but the scope of the present invention is not limited thereto.

3 to 6 show photographs illustrating a process of fixing an adhesive tape of a taping portion of an electrode assembly taping apparatus according to an embodiment of the present invention.

3, the taping apparatus 100 includes a supply unit 140 for supplying the adhesive tape 150, a clamp 160 for pulling the adhesive tape 150, a fixed adhesive tape 150 And a taping portion 110 for attaching the adhesive tape 150 to the electrode assembly.

The taping portion 110 includes a first pressing part 111 and a second pressing part 112 and includes a first fixing part 113 for fixing the upper and lower portions of the non- And a second fixed end 114,

The first pressing part 111 and the second pressing part 112 of the taping part 100 are arranged such that when the first fixing part 113 and the second fixing part 114 fix the adhesive tape 150 The first fixed end 113 and the second fixed end 114 are aligned in a direction perpendicular to the paper surface, and no step is formed.

The first pressing part 111 and the second pressing part 112 of the taping part 100 according to the present invention are arranged such that the first fixing part 113 and the second fixing part 114 are positioned in a direction in which the electrode assembly is formed And a control function for adjusting the lengths of various steps based on the reference values.

Therefore, the taping apparatus 100 according to the present invention includes a function of adjusting the step length, and thus facilitates fixing to the first fixed end 113 and the second fixed end 114 of the adhesive tape 150, Since the adhesive tape 150 is more tightly fixed in the process of forming the step between the fixed end 113 and the second fixed end 114 in order to add the adhesive tape 150 to the electrode assembly , The adhesive tape 150 can be closely attached to the electrode assembly (Figs. 8 and 400).

Hereinafter, a concrete procedure for fixing the adhesive tape 150 to the first fixed end 113 and the second fixed end 114 will be described.

3 to 6, the clamp 160 is moved upward to the feeder 140 for feeding the adhesive tape to pull the adhesive tape, and the moved clamp 160 is moved upward by the clamp 162 The adhesive tape 150 is pulled by moving one end of the adhesive tape 150 of the supply unit 140 downward by a certain distance.

Thereafter, the transfer unit 170 is driven so that the first fixed end 113 and the second fixed end 114 of the taping unit 110 are brought into close contact with the non-adhesive surface of the adhesive tape 150, The upper and lower portions of the adhesive tape 150 are fixed to the first fixed end 113 and the second fixed end 114, respectively.

Finally, the cut part 130 is advanced across the first fixed end 113 and the second fixed end 114 while the adhesive tape 150 is fixed, and one end of the adhesive tape 150 is cut, The process of fixing the tape 150 to the first fixed end 113 and the second fixed end 114 is completed.

7 is a side view and a front view schematically showing the first press table 111 and the second press table 112 of the taping part 110 according to an embodiment of the present invention, 10 is a schematic view showing a process of adding the adhesive tape 150 to the electrode assembly 400 according to an embodiment of the present invention.

7, the first fixed end 113 and the second fixed end 114 are formed with suction holes 116 and 117 for fixing the adhesive tape 150 by an adsorption method, The first press table 111 and the second press table 112 are provided with protrusions 115 and 116 which are in close contact with the outer surface of the electrode assembly 400 with the adhesive tape 150, The protrusions 115 of the second pressers 112 and the protrusions 116 of the second pressers 112 protrude from each other.

7 to 10, the electrode assembly 400 of the present invention includes an anode 410, a cathode 420, and a separator 430 interposed between the anode 410 and the cathode 420. [ The separation membrane 430 of the electrode assembly 400 is formed by protruding the outer peripheral surface of the electrode assembly 400 on one side of the electrode assembly 400.

The taping apparatus 100 according to an embodiment of the present invention includes the electrode assembly 400 having the outer circumferential edge pad 432 formed thereon, The first fixed terminal 113 and the second fixed terminal 114 form a step D at a position relative to the electrode assembly 400. Due to such a structure, (C) of 50 to 80 degrees as a reference.

Hereinafter, a process of taping the electrode assembly 400 of the taping apparatus 100 will be described in detail.

First, the taping portion 110 advances in a downward diagonal direction P with respect to a direction perpendicular to the paper surface, approaches the side surface of the electrode assembly 400, and the protrusions 115, 116 of the electrode assembly 400 are pressed against the uppermost surface 405 and the lowermost surface 406 of the electrode assembly 400 to sequentially move the adhesive tape 150 to the upper surface 405 and the outer surface 407 of the electrode assembly 400, And the bottom edge 406, and the peripheral edge outside the separating membrane 432 are all bent downward uniformly.

The adhesive tape 150 is attached to the outer surface of the electrode assembly 400 so that all of the adhesive tape 150 is separated from the first fixed terminal 115 and the second fixed terminal 116, (F) from the electrode assembly 400 after returning to the original position after the upper surface 405 and the lower surface 406 are closely contacted.

As described above, the electrode assembly taping apparatus 100 according to the present invention can attach the adhesive tape 150 continuously from the uppermost surface 405 to the lowermost surface 406 on the outer surface of the electrode assembly 400, , It is possible to add the adhesive tape 150 by bending the outer peripheral surface of the separation membrane 400 uniformly in the intended direction.

11 is a side view schematically showing a process of adding an adhesive tape 150 to an electrode assembly 500 using a taping part 210 according to another embodiment of the present invention. Sectional view schematically showing the stacked structure of the stacked electrode assembly 500 in which the adhesive tape 150 is added using the electrode unit 210. As shown in FIG.

11 and 12, the taping portion 210 is different from the taping portion 110 of FIG. 8 in that the second fixed end 213 is located closer to the electrode assembly 500 than the first fixed end 213 To form a stepped (E) structure. The taping portion 210 having such a structure advances in an upward diagonal direction G with respect to a direction perpendicular to the paper surface to approach the side surface of the electrode assembly 500 and the protrusion 215 of the taping portion 210 And 216 are pressed against the uppermost surface 505 and the lowermost surface 506 of the electrode assembly 500 to sequentially move the adhesive tape 250 between the lowermost surface 506 and the outer surface 507 of the electrode assembly 500 And the uppermost surface 505, and the outer peripheral edge 532 of the separation membrane is bent upward all at a constant rate.

The process of adding the adhesive tape 150 of the remaining taping parts 210 and the effect thereof are the same as those of the taping device 100 described above, and a detailed description thereof will be omitted.

13 is a photograph showing an electrode assembly taping apparatus 100 according to an embodiment of the present invention, which attaches the adhesive tape 150 to the electrode assembly 400. FIG.

Referring to FIG. 13, the pre-taping photograph shows a scene immediately before the taping portion 110 approaches and tapers to one side of the electrode assembly 400. The first fixed end 113 and the second fixed end 114 form a step on the taping part 110 at positions relative to the electrode assembly 400. The first fixed end 113 and the second fixed end 114 An adhesive tape (150) is fixed to the fixed end (114).

In addition, the photo after taping shows that the adhesive tape 150 is attached to the electrode assembly 400, and the taping portion 110 is returned back to the original position.

14 schematically shows a top view of an electrode assembly 600 to which an adhesive tape 631, 632, 633, 634 according to an embodiment of the present invention is attached.

14, an electrode assembly 600 according to the present invention is provided with adhesive tapes 631, 632, 633 and 634 on the outer circumferential surfaces of the electrode assembly 600 facing each other. The electrode assembly 600 is formed such that the adhesive tapes 631. 632 633 634 bend the outer peripheral edge 630 of the separator upward or downward and adhere and adhere together with the anode 610 and the cathode It is possible to prevent the internal short circuit due to shrinkage of the separator and to improve the high-temperature safety even in a high-temperature environment, because the laminate structure of the electrode assembly 600 is stable.

Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims (24)

An apparatus for attaching an adhesive tape to an outer surface of an electrode assembly having a laminated structure composed of an anode, a cathode, and a separator interposed between the anode and the cathode,
A first pressure bar provided with a first fixed end for fixing the upper portion of the non-adhesive surface of the adhesive tape, and a second pressing surface provided with a second fixed end for fixing the lower portion of the non- A taping portion including a base;
A clamp for pulling the adhesive tape so that the non-adhesive surface of the adhesive tape is positioned on one side of the first press table and the second press table; And
A conveying unit for conveying the first presser bar and the second presser bar;
And,
Wherein the first pushing member and the second pushing member are formed such that the first fixed end and the second fixed end form a step with respect to the electrode assembly. The method according to claim 1, wherein the first fixed end and the second fixed end form steps with respect to each other such that the inclined surfaces of the adhesive tape fixed to the fixed ends have an angle of 50 to 80 degrees with respect to a direction perpendicular to the paper surface The electrode assembly taping device. The apparatus according to claim 1, wherein the adhesive tape is attached while bending the surplus portion of the outer peripheral surface of the separation membrane upward or downward. 2. The electrode assembly according to claim 1, wherein each of the first presser bar and the second presser bar includes at least one protrusion for bringing the adhesive tape into close contact with the outer surface of the electrode assembly, and the protrusion of the first presser bar and the protrusion of the second presser bar Wherein the electrode assembly is protruded so as to face each other with respect to the electrode assembly. delete 5. The electrode assembly according to claim 4, wherein the taping portion is advanced toward the electrode assembly in an upward or downward diagonal direction with respect to a direction perpendicular to the paper surface and approaches one side of the electrode assembly, And the adhesive tape is adhered to the electrode assembly by advancing and advancing to the uppermost surface and the lowermost surface of the electrode assembly taping device. [7] The apparatus according to claim 6, wherein the taping portion advancing in the downward diagonal direction attaches the adhesive tape sequentially to the uppermost surface, the outer surface, and the lowermost surface of the electrode assembly. 7. The apparatus according to claim 6, wherein the taping portion advancing in the upward diagonal direction attaches the adhesive tape sequentially to the bottom, outer, and top surfaces of the electrode assembly. 7. The apparatus according to claim 6, wherein the diagonal direction is in the range of 30 to 60 degrees with respect to a direction perpendicular to the paper surface. The apparatus of claim 1, wherein the first fixed end and the second fixed end fix the adhesive tape by an adsorption method, and the first fixed end and the second fixed end have an adsorption port for adsorbing the adhesive tape To the electrode assembly. The apparatus of claim 10, wherein the attraction force formed on the suction port is such that the adhesive tape fixed to the first fixed end and the second fixed end is separated by the adhesive force of the adhesive tape and the outer surface of the electrode assembly. The electrode assembly taping device. The apparatus according to claim 1, further comprising a cut portion for cutting one end of the adhesive tape. The apparatus according to claim 1, wherein the adhesive tape is a member in which an adhesive is applied to a film base of polyethylene (PE), polypropylene (PP), or polyethylene terephthalate (PET). A method of attaching an adhesive tape to an outer surface of an electrode assembly using an electrode assembly taping apparatus according to any one of claims 1 to 4 and 6 to 13,
(a) a clamp grips one end of the adhesive tape to pull the adhesive tape and moves across one side of the tape to face the non-adhesive side of the adhesive tape;
(b) fixing the upper portion of the non-adhesive surface of the adhesive tape by the first fixing end and fixing the lower portion of the non-adhesive surface of the adhesive tape by the second fixing end;
(c) conveying the taping portion by the conveying portion so that the adhesive surface of the adhesive tape and one side of the electrode assembly face each other;
(d) the taping part advances to one side of the electrode assembly in a downward diagonal direction of the electrode assembly, and the protrusions of the taping parts are closely contacted with the uppermost surface and the lowermost surface of the electrode assembly, And the bottom surface, or
The taping portion advances to one side of the electrode assembly in an upward diagonal direction of the electrode assembly and the protrusion of the taping portion advances and sticks to the uppermost surface and the lowermost surface of the electrode assembly so that the adhesive tape sequentially reaches the lowest, ;
(e) returning the taping portion separated from the adhesive tape back to the original position from the electrode assembly;
And the adhesive tape is attached to the adhesive tape. The method of claim 14, further comprising, after the step (b), cutting the one end portion of the adhesive tape by cutting the first and second fixed ends with the adhesive tape in a fixed state Wherein the adhesive tape is attached to the adhesive tape. A battery cell manufactured using an electrode assembly taping apparatus according to any one of claims 1 to 4 and 6 to 13,
An electrode assembly having a laminated structure composed of a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode is mounted on a storage portion of the battery case;
The separation membrane is protruded to a length longer than the anode and the cathode to form an outer circumferential surplus portion;
Wherein an adhesive tape is attached to an outer surface of the electrode assembly so as to maintain a laminated structure of the electrode assembly;
And an outer peripheral surplus portion of the separation membrane is bent in the same one direction by the adhesive tape. 17. The battery cell according to claim 16, wherein the adhesive tape is added from the uppermost surface to the lowermost surface with respect to the stacking direction of the electrodes. 17. The battery cell according to claim 16, wherein a length of protrusion of the outer circumferential surplus portion of the separator is 0.75 mm to 1.00 mm. 17. The battery cell of claim 16, wherein the electrode assembly is a bi-cell having a separator formed on the uppermost or lowermost end thereof. 17. The battery cell according to claim 16, wherein the battery case comprises a cylindrical or rectangular can, and a cap mounted on an open upper end of the can. The battery cell according to claim 16, wherein the battery case is a pouch-shaped case of a laminate sheet including a resin layer and a metal layer. The battery cell according to claim 16, wherein the battery cell is a lithium secondary battery. A device comprising the battery cell according to claim 16 as a power source. 24. The device of claim 23, wherein the device is selected from the group consisting of a mobile phone, a portable computer, a smart phone, a tablet PC, a smart pad, a netbook, a LEV (Light Electronic Vehicle), an electric vehicle, a hybrid electric vehicle, Device. ≪ / RTI >

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