KR20170072703A - Auxiliary battery - Google Patents

Abstract

A secondary battery is provided. The auxiliary battery according to an embodiment of the present invention includes a body portion; A band portion coupled to both ends of the body portion so that the user can wear the body and having a flexible battery built therein; And a connecting means having a first terminal portion and a second terminal portion on both sides of the first terminal portion and the second terminal portion so as to serve as a charging cable and the first terminal portion and the second terminal portion are detachably coupled to the body portion. According to the present invention, since the flexible battery is detachably coupled to the electronic device for connecting the electronic device, the portable electronic device can be connected to the electronic device by using a cable coupled to the electronic device, The battery can be charged.

Description

Auxiliary battery}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary battery, and more particularly to an auxiliary battery which does not need to carry a usual charging cable separately for charging electronic equipment.

In general, a portable terminal such as a smart phone is a multimedia integrated device and is a necessity indispensable to modern people. Unlike the past portable terminal, it is intended to perform various functions such as internet, application, TV, navigation, have.

In such a smart phone, a built-in battery that can not be replaced or a basic battery that can be replaced is disposed. Recently, various technologies for increasing the battery usage of the portable terminal have been developed as the power consumption of the terminal increases .

As a part of this, an auxiliary battery which can be carried easily is produced and sold. However, when the battery of the portable terminal needs to be charged and discharged, a separate charging cable such as a USB cable is required to charge the battery using the auxiliary battery.

Accordingly, there is a problem that the user has to separately carry the charge cable for charge as well as the auxiliary battery.

Korea Open Patent No. 2012-0136146 (public date December 18, 2012)

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a charging cable, The present invention provides an auxiliary battery which can easily charge the object to be charged even if the battery is not charged.

In addition, since the flexible battery built in the band unit can be used as an auxiliary battery for charging the main battery to be charged, it is not necessary to carry a separate auxiliary battery and the battery can be easily charged Another purpose is to provide a rechargeable secondary battery.

In order to solve the above-described problems, A band portion coupled to both ends of the body portion so that the user can wear the body and having a flexible battery built therein; And a connection means having a first terminal portion and a second terminal portion on both sides of the first terminal portion and the second terminal portion so as to be capable of serving as a charging cable, and the first terminal portion and the second terminal portion being detachably coupled to the body portion, Lt; / RTI >

In addition, the body portion and the band portion may be formed in a ring shape as a whole.

In addition, the connecting means may be coupled to the body portion so as to be disposed side by side with the band portion.

Also,  A first terminal unit installed at one end of the connection cable and selectively connected to one of a charging object and a charging device when the body is separated from the body; And a second terminal unit installed at the other end of the connection cable and electrically connected to the flexible battery when the connection cable is coupled to the body unit.

In addition, the body may have an upper surface exposed to the outside when the user wears the body; A lower surface formed on the opposite side of the upper surface and contacting the user's body; And both side surfaces formed at both ends of the upper surface and the lower surface in the lengthwise direction of the upper surface and the lower surface, wherein the band portion and the connecting means are respectively coupled to the both side surfaces .

Further, a display portion may be formed on the upper surface.

Further, the upper surface and the lower surface may be curved.

The body portion may include a first body to which the one end of the band portion and the first terminal portion are coupled, respectively; And a second body to which the other end of the band portion and the second terminal portion are respectively coupled, and the first body and the second body may be detachably coupled.

Also, any one of the first body and the second body may be provided with a circuit unit for electrically connecting the flexible battery to any one of a charging object and a charging apparatus.

Also, Each of the first body and the second body may have a first receiving portion and a second receiving portion, to which the first terminal portion and the second terminal portion are detachably coupled.

A fastening portion may be formed on one side of the first body, and a corresponding fastening portion may be formed on one side of the second body so that the fastening portion of the first body is detachably coupled.

The connection cable may further include a protection member surrounding the outer circumferential surface.

In addition, the protective member may be made of any one of leather, fabric, and urethane resin.

In addition, the pattern may be provided entirely or partially along the longitudinal direction of the flexible battery.

The flexible battery includes: an electrode assembly including an anode, a cathode, and a separator; And an exterior material encapsulating the electrode assembly together with the electrolytic solution. The patterns may be formed in the exterior material and the electrode assembly so as to match each other.

The electrode assembly may further include a cathode on which a cathode active material layer is disposed on one surface or both surfaces of the cathode current collector and a cathode and a separator on which an anode active material layer is disposed on one or both surfaces of the anode current collector, A pattern matching the pattern of the exterior material may be provided.

The separation membrane may further include a nonwoven fabric layer; And a nanofiber web layer containing polyacrylonitrile nanofibers laminated on one or both surfaces of the nonwoven fabric layer.

According to the present invention, since the connecting means serving as a charging cable is detachably coupled to the body portion and can be carried along with the body portion at all times, it is possible to easily carry the object to be charged, The main battery of the wearable device such as the terminal or the smart watch can be charged.

Further, the present invention can charge the main battery to be charged by using the power of the flexible battery built in the band part, so that it is not necessary to carry a separate auxiliary battery and the main battery of the charging object can be easily And the use time of the object to be charged can be increased.

1 is a perspective view schematically illustrating an auxiliary battery according to an embodiment of the present invention,
FIG. 2 is a perspective view illustrating a connecting device in a secondary battery according to an embodiment of the present invention,
3 is an internal sectional view of the auxiliary battery according to one embodiment of the present invention viewed from the front;
FIG. 4 is a diagram illustrating a state of use in which a charging object is charged using a power source of a flexible battery applied to an auxiliary battery according to an embodiment of the present invention,
FIG. 5 is a diagram showing a state of use in which a flexible battery applied to the auxiliary battery according to the embodiment of the present invention is charged by a charger,
6 is a view showing a flexible battery applied to the auxiliary battery according to an embodiment of the present invention,
FIG. 7 is an enlarged cross-sectional view showing a detailed configuration of a flexible battery applied to an auxiliary battery according to an embodiment of the present invention,
FIG. 8 is a schematic view showing various patterns formed on the electrode assembly and the casing in the flexible battery applied to the auxiliary battery according to the embodiment of the present invention, and FIG.
9 to 12 are schematic views showing various forms of patterns in a flexible battery applied to the auxiliary battery according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

1, the auxiliary battery 100 according to an exemplary embodiment of the present invention can be worn on a user's body, for example, a user's wrist, and can be used as an auxiliary for charging a battery Can be used as a battery.

The auxiliary battery 100 according to the present invention may include the body 110, the band 120, and the connecting means 130.

First, the body 110 may have a hexahedral shape including an upper surface 110a, a lower surface 110b, and a side surface 110c.

More specifically, the upper surface 110a is a surface exposed to the outside when the user wears the wrist. The upper surface 110a may include a display unit 111a on which predetermined information is displayed.

Here, the display unit 111a may display an image or display a time or the like. For example, the display unit 11a may display various characters, numbers, and images through an electrical signal, and may display contents transmitted through near-field data communication with other electronic devices.

The lower surface 110b of the body 110 may be a surface formed on the opposite side of the upper surface 110a and may be a surface that is in contact with the user's body when the user wears the wrist.

In this case, the body 110 may be formed to have a curved surface so that the wearer feels comfortable to wear the body 110 when the body 110 is worn and the aesthetic sense is enhanced. The upper surface 110a It can be formed to have a curved surface.

The side surface 110c is a surface connecting the upper surface 110a and the lower surface 110b and includes a first side surface 110d formed along the longitudinal direction of the lower surface 110b and the upper surface 110a, And a second side 110e formed along the width direction of the surface 110a and the lower surface 110b.

Accordingly, the body 110 may have a hexahedral shape by the upper surface 110a, the lower surface 110b, and the side surface 110c.

However, the shape of the body 110 is not limited thereto, and it may be formed in a cylindrical shape, or may have various shapes known in the art.

Meanwhile, the auxiliary battery 100 according to an embodiment of the present invention can be held or worn on the user's wrist through separation and fastening of the body 110.

For this, the body 110 includes a first body 111 and a second body 112, and the first body 111 and the second body 112 may be separated or fastened to each other 3).

Specifically, the first body 111 has a fastening portion 111b formed at one side thereof, and a corresponding fastening portion 112b is formed at one side of the second body 112 to which the fastening portion 111b is coupled .

At this time, the fastening portion 111b and the corresponding fastening portion 112b may be provided in the form of a groove and a projection corresponding to each other. As a result, the protrusion is inserted into the groove and the first body 111 and the second body 112 are engaged with each other, or the protrusion is separated from the groove, so that the first body 111 and the second body 112 112 are separated.

Although the fastening portion is provided in the shape of a protrusion and the corresponding fastening portion is provided in a groove shape, the fastening portion is not limited thereto. The fastening portion may be provided in the form of a groove, and the corresponding fastening portion may be provided in the form of a projection .

In addition, although the first body and the second body are shown as being coupled by the groove and the projection, the present invention is not limited thereto, and various known coupling methods can be used. For example, it is noted that the fastening portion and the corresponding fastening portion may be coupled in a sliding manner, or the fastening portion and the corresponding fastening portion may be magnetically coupled with a magnet member having a different pole, respectively.

At least one of the first body 111 and the second body 112 may be configured to use the flexible battery 140 as an auxiliary battery to drive the body 110 or the band 120, .

For example, when the display portion 111a is provided on the first body 111 side, a first circuit portion 111c for driving the display portion 111a is provided in the first body 111a .

The first circuit unit 111c may be formed of various devices and circuits electrically connected to the display unit 111a to display various information such as images, characters, and numbers on the display unit 111a.

Meanwhile, the first body 111 may have a first receiving portion 111d to which the connecting means 130, which will be described later, is fastened. The first receiving portion 111d may be formed in a groove corresponding to the first terminal portion 132 as a space for receiving the first terminal portion 132 of the connecting means 130. [

The second body 112 may include a second circuit unit 112c for using the flexible battery 140 built in the band unit 120 as an auxiliary battery.

The second circuit unit 112c is electrically connected to the flexible battery 140 to supply power supplied from the outside to the flexible battery 140 or to transfer the power stored in the flexible battery 140 to the charging object do. That is, the second circuit part 112c is electrically connected to the negative terminal 28a and the positive terminal 28b protruding from the flexible battery 140, and the second body part 112 and the connection part 130 And is electrically connected to the second terminal portion 133 provided on the connecting means 130 when the first terminal portion 133 is coupled.

Here, a second accommodating portion 112d for accommodating the second terminal portion 133 is provided on one side of the second body 112. The second accommodating portion 112d is a space for accommodating the second terminal portion 133 of the connecting means 130. The second accommodating portion 112d is formed at one side of the second body 112, Or the like.

The second receiving portion 112d is provided with a terminal (not shown) electrically connected to the second circuit portion 112c so that when the second terminal portion 133 is coupled, the second terminal portion 133 and the second So that the circuit portion 112c is electrically connected. For example, the second receiving portion 112d may be a USB type terminal.

Although the second circuit portion 112c is illustrated and described as being disposed inside the second body 112, the second circuit portion is disposed inside the first body 112, , The first circuit part may be disposed inside the second body.

In addition, the first circuit unit and the second circuit unit may be embedded in any one of the first body and the second body. In this case, the first circuit unit and the second circuit unit may be integrated into one circuit unit and driven.

Meanwhile, the band part 120 is for wearing the body part 110 on the wrist of a user, and may be made of a flexible material such as leather or silicone.

The band portion 120 may have a predetermined length and may have a band shape when worn by a user and may be fixed to one side 110e of the body portion 110 at both ends thereof.

At this time, the band unit 120 may be used as an auxiliary battery for supplying electric power for charging the main battery of the portable terminal, for example.

To this end, the band unit 120 includes a flexible battery 140 that provides power. Hereinafter, the flexible battery 140 will be described in detail.

In the auxiliary battery 100 according to the embodiment of the present invention, the connection unit 130 functions as a charging cable, so that the power supplied from the flexible battery 140 built in the band unit 120 is supplied to the charging object And the power supplied from the charging device can be supplied to the flexible battery 140 side.

The connecting means 130 has a predetermined length and both ends are coupled to the body 110.

The connecting means 130 includes the first receiving portion and the second receiving portion formed on the second side 110e of the body 110 so as to be horizontally aligned with the band 120, Both ends of the connecting means 130 can be coupled.

Both ends of the connecting means 130 are detachably coupled to the body 110.

Accordingly, when charging the main battery to be charged or charging the flexible battery by using the connecting means 130, one end of the connecting means 130 is separated from the body 110, So that they can be electrically connected.

To this end, the connection means 130 includes a connection cable 131, a first terminal portion 132 and a second terminal portion 133. The connection cable 131 includes a conductive line for electrically connecting the flexible battery 140 to one of the charging object and the charging device, and the conductive line serves as a passage through which the electricity flows.

Here, the connection cable 131 includes a soft protective member 134 for protecting the wire from being exposed to the outside, thereby protecting the wire from the external environment.

At this time, the protective member 134 may be made of any one of leather, fabric, and urethane resin. In addition, the protective member 134 may be made of the same material as or different from the material of the band 120.

The first terminal portion 132 and the second terminal portion 133 are formed on both ends of the connection cable 131 for electrical connection with an external device or the body portion 110. That is, the first terminal part 132 functions as a connection terminal for electrically connecting the charging cable to the charging object or the charging device, and the second terminal part 133 functions as a flexible battery 140 built in the band part, And serves as a connection terminal for electrically connecting the charging cable.

Here, the first terminal portion 132 and the second terminal portion 133 may be a commonly used USB type terminal.

The first terminal portion 132 and the second terminal portion 133 are detachably coupled to the first accommodating portion 111d and the second accommodating portion 112d.

Here, when the second terminal portion 133 is fastened to the second housing portion 112d, the second terminal portion 133 is electrically connected to the second circuit portion.

When the main battery to be charged is to be charged by using the power of the flexible battery 140, the first terminal portion 132 is inserted into the second accommodating portion while the second terminal portion 133 is inserted into the second accommodating portion. When the battery is separated from the first accommodating portion and connected to the object to be charged, the power supplied from the flexible battery 140 is transmitted to the object to be charged through the second circuit portion 112c to charge the main battery to be charged Reference).

On the other hand, when the flexible battery 140 needs to be charged, the first terminal portion 132 is separated from the first accommodating portion in a state where the second terminal portion 133 is inserted into the second accommodating portion, When the battery is connected to the charger, power is supplied from the charging device through the second circuit part 112c to the flexible battery, thereby charging the flexible battery (refer to FIG. 5).

Accordingly, the auxiliary battery 100 having the auxiliary battery according to the present invention uses the connecting means 130 coupled to the body 110 as a charging cable when the charging object is to be charged, Since the battery can be used as a secondary battery, the main battery of the charging object can be easily charged. Therefore, it is not necessary to separately carry the charge cable and the auxiliary battery necessary for charging.

The flexible battery 140 is for supplying power for charging the main battery to be charged, and includes a casing member 141 and an electrode assembly 145 as shown in FIG.

The electrode assembly 20 is encapsulated with an electrolytic solution inside the casing 30 and may have a separation membrane 26 formed between the anode 22 and the cathode 24.

The positive electrode 22 includes a positive electrode collector 22a and a positive electrode active material 22b and the negative electrode 24 includes a negative electrode collector 24a and a negative electrode active material 24b. So that it can be integrated with the separator 26.

The negative electrode current collector 24a and the positive electrode current collector 22a may each have a negative electrode terminal 28a and a positive electrode terminal 28b extending from the body.

At this time, the separation membrane 26 may include a nanofiber web layer 26b on one side or both sides of the nonwoven fabric layer 26a.

Here, the nanofiber web layer 26b may be a nanofiber containing at least one selected from the group consisting of polyacrylonitrile nanofiber and polyvinylidene fluoride nanofiber.

Preferably, it may be composed of only polyacrylonitrile nanofibers to ensure the formation of radioactive and uniform pores in the formation of the nanofiber web layer 26b. The polyacrylonitrile nanofibers of the nanofiber web layer 26b may have an average diameter of 0.1 to 2 mu m, and preferably 0.1 to 1.0 mu m.

This is because if the average diameter of the nanofibers is less than 0.1 mu m, the separation membrane may not have sufficient heat resistance. If the average diameter is more than 2 mu m, the mechanical strength of the separation membrane is excellent, but the elasticity of the separation membrane may be reduced.

Also, the nonwoven fabric constituting the nonwoven fabric layer may be selected from the group consisting of cellulose, cellulose acetate, polyvinyl alcohol (PVA), polysulfone, polyimide, polyetherimide, polyamide, (PEO), polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyurethane (PU), polymethylmethacrylate (PMMA) poly methylmethacrylate) and polyacrylonitrile may be used.

The nonwoven fabric layer may further include inorganic additives such as SiO, SnO, SnO ₂ , PbO ₂ , ZnO, P ₂ O ₅ , CuO, MoO, V ₂ O ₅ , B ₂ O ₃ , Si ₃ N ₄ , CeO ₂ , Mn ₃ O ₄ , Sn ₂ P ₂ O ₇ , Sn ₂ B ₂ O ₅ , Sn ₂ BPO ₆ , TiO ₂ , BaTiO ₃ , Li ₂ O, LiF, LiOH, Li ₃ N, It may include _{BaO, Na 2 O, Li 2} CO 3, CaCO 3, LiAlO 2, SiO 2, Al 2 O 3 and at least one selected from PTFE.

The inorganic particles as the inorganic additive may have an average particle diameter of 10 to 50 nm, preferably 10 to 30 nm, and more preferably 10 to 20 nm.

In addition, the average thickness of the separator may be 10 to 100 mu m, preferably 10 to 50 mu m.

If the average thickness of the separator is less than 10 mu m, the separator may be too thin to ensure long-term durability of the separator due to repeated bending and / or spreading of the battery. If the average thickness exceeds 100 mu m, It is preferable to have an average thickness within the range.

The nonwoven fabric layer may be formed to have an average thickness of 10 to 30 탆, preferably 15 to 30 탆, and the nanofiber web layer may have an average thickness of 1 to 5 탆.

The anode current collector and / or the anode current collector may be made of a thin metal foil and may be formed in a strip shape having a predetermined length and may be formed of copper, aluminum, stainless steel, nickel, titanium, chromium, manganese, iron, cobalt, zinc, molybdenum , Tungsten, silver, gold, and combinations thereof.

The cathode active material includes a cathode active material capable of reversibly intercalating and deintercalating lithium ions. Typical examples of the cathode active material include LiCoO ₂ , LiNiO ₂ , LiMnO ₂ , LiMn ₂ O ₄ , or LiNi 1-x-yCoxMyO 2 ( Transition metal oxides such as 0? X? 1, 0? Y? 1, 0? X + y? 1 and M is a metal such as Al, Sr, Mg, La or the like. However, in the present invention, it is also possible to use other kinds of cathode active materials in addition to the cathode active material.

The negative electrode active material includes a negative electrode active material capable of intercalating and deintercalating lithium ions. Examples of the negative electrode active material include carbon-based negative electrode active material of crystalline or amorphous carbon, carbon fiber, or carbon composite material, tin oxide Lithium, a lithium alloy, and a mixture thereof. However, the present invention is not limited to the kind of the negative electrode active material.

Meanwhile, the positive electrode active material and the negative electrode active material may contain a PTFE (Polytetrafluoroethylene) component in order to prevent peeling from the positive electrode collector or the negative electrode collector and to prevent cracking of the positive electrode active material layer and the negative electrode active material layer.

The casing member 30 is made of a plate-shaped member having a predetermined area and serves to protect the electrode assembly 20 from external force by accommodating the electrode assembly 20 and the electrolyte therein.

To this end, the casing 30 includes a pair of first casing members 32 and a second casing member 34, and the electrolyte solution and the electrode assembly 20, which are contained in the casing 30, Thereby preventing the electrolyte from leaking to the outside.

The outer sheath 30 may be sealed by an adhesive, the outer sheath 32 and the outer sheath 34 being made of two members and then being in contact with each other, or may be made of one member, It should be noted that the remainder that is folded in half along the direction and then abutted may be sealed through the adhesive.

At this time, the exterior material 30 may be provided on at least one side with a pattern 36 for contraction and relaxation when bending.

This pattern 36 is for contraction and relaxation in the longitudinal direction of the facing material 30 at the time of bending. The pattern 36 may be repeatedly arranged along the longitudinal direction of the facing material 30.

More specifically, the crests and valleys of the pattern 36 are formed parallel to a straight line parallel to the width direction of the casing member 30. [

At this time, the pattern 36 may be formed in parallel with the adjacent crests and valleys at equal intervals, or may be formed in parallel with the intervals of the adjacent crests or valleys at different intervals, Gaps may be provided in a combined form.

Accordingly, the flexible battery 140 according to an exemplary embodiment of the present invention can be easily shrunk and relaxed in the longitudinal direction during the bending process through the pattern 36.

Therefore, even if the repeatedly bending operation of the case 30 is repeated, the fatigue applied to the case 30 itself can be reduced, and the electrode assembly 20 disposed inside the case 30 can also be bent Thereby being protected from the load generated during the operation.

In addition, the pattern formed on the casing member 30 may be formed on the entire surface of the casing member 30 or may be partially formed.

The electrode assembly 20 may be provided in the shape of a flexible plate, but the same pattern 28 as the pattern 36 formed on the casing 30 for shrinking and relaxing during bending, like the casing 30, .

That is, the anode 22, the cathode 24, and the separator 26, which constitute the electrode assembly 20, may have the same pattern as the pattern 36 formed on the casing 30 for shrinking and relaxing during bending have.

Here, the pattern 28 formed on the electrode assembly 20 is formed parallel to a straight line parallel to the width direction as shown in Fig. It will be appreciated that the pattern 36 formed on the casing 30 and the pattern 28 formed on the electrode assembly 20 need only be matched with each other.

9 to 12, the crests and valleys may be continuously or discontinuously formed, and the cross-sectional shapes of the crests and valleys may be linear patterns, prism patterns, semicircular patterns, wave patterns A pattern, a polygonal pattern, and a mixed pattern thereof.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: auxiliary battery
110: body part 120: band part
130: connecting means 131: connecting cable
132: first terminal portion 133: second terminal portion
134: protective member 140: flexible battery

Claims (18)

A body portion;
A band portion coupled to both ends of the body portion so that the user can wear the body and having a flexible battery built therein; And
And connecting means having a first terminal portion and a second terminal portion on both sides of the first terminal portion and the second terminal portion so as to serve as a charging cable, and the first terminal portion and the second terminal portion being detachably coupled to the body portion. The method according to claim 1,
Wherein the body portion and the band portion are formed in a ring shape as a whole. 3. The method of claim 2,
And the connecting means is coupled to the body portion so as to be arranged side by side with the band portion. The method of claim 3,
Wherein the connecting means comprises:
Connecting cable;
A first terminal unit installed at one end of the connection cable and selectively connected to one of a charging object and a charging device when the body is separated from the body; And
And a second terminal provided at the other end of the connection cable and electrically connected to the flexible battery when the connection cable is coupled to the body. 3. The method of claim 2,
The body
An upper surface exposed to the outside when the user wears the body;
A lower surface formed on the opposite side of the upper surface and contacting the user's body; And
And both side surfaces formed at both ends of the upper surface and the lower surface in the longitudinal direction of the upper surface and the lower surface,
Wherein the band portion and the connecting means are coupled to the both sides of the auxiliary battery. 6. The method of claim 5,
And a display unit is formed on the upper surface. 6. The method of claim 5,
Wherein the upper surface and the lower surface are curved. 5. The method of claim 4,
The body portion
A first body to which one end of the band portion and the first terminal portion are coupled, respectively; And
And a second body to which the other end of the band portion and the second terminal portion are respectively coupled,
Wherein the first body and the second body are detachably coupled to each other. 9. The method of claim 8,
Wherein one of the first body and the second body is provided with a circuit unit for electrically connecting the flexible battery to one of a charging object and a charging device. 9. The method of claim 8,
Wherein each of the first body and the second body has a first accommodating portion and a second accommodating portion to which the first terminal portion and the second terminal portion are detachably coupled. 9. The method of claim 8,
Wherein a fastening portion is formed on one side of the first body and a corresponding fastening portion is formed on one side of the second body so that the fastening portion of the first body is detachably coupled. 5. The method of claim 4,
Wherein the connecting cable further comprises a protective member surrounding the outer circumferential surface. 13. The method of claim 12,
Wherein the protection member is made of one of leather, fabric, and urethane resin. The method according to claim 1,
Wherein the flexible battery has a pattern for shrinkage and relaxation on at least one surface thereof. 15. The method of claim 14,
Wherein the pattern is provided entirely or partly along the longitudinal direction of the flexible battery. 15. The method of claim 14,
The flexible battery includes:
An electrode assembly including an anode, a cathode, and a separator; And
And an outer casing that encapsulates the electrode assembly together with the electrolyte,
Wherein the pattern is formed in the outer casing and the electrode assembly. 17. The method of claim 16,
The electrode assembly includes a cathode on which a cathode active material layer is disposed on one surface or both surfaces of a cathode collector, and a cathode and a separator on which an anode active material layer is disposed on one or both surfaces of the anode collector,
Wherein the positive electrode, the negative electrode, and the separation membrane each have a pattern matching the pattern of the casing. 17. The method of claim 16,
Wherein the separation membrane comprises a nonwoven fabric layer; And a nanofiber web layer containing polyacrylonitrile nanofibers laminated on one or both sides of the nonwoven fabric layer.

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