KR20100082679A - Elastic thin film battery - Google Patents

Abstract

PURPOSE: An elastic thin film battery is provided to apply the battery to various curved surfaces, and to secure the efficiency and the safety of the battery. CONSTITUTION: An elastic thin film battery(100) comprises the following: a pair of thin film substrates formed with an electrical insulating material with the elasticity and the flexibility; a conductive layer in a network structure; and multiple unit thin film battery cells(500) forming an island type arrangement. The thin film substrates are formed with a material based on a polymer resin.

Description

Elastic Thin Film Battery

The present invention relates to an elastic thin film battery, and more particularly, a pair of thin film substrates made of an insulating material having flexibility and flexibility; A conductive layer having a network structure respectively formed on the thin film substrate; And a plurality of unit thin film battery cells interposed between the thin film substrates in a state in which an anode and a cathode are electrically connected to the conductive layer, respectively, and having an island-like structure spaced apart from each other. The present invention relates to an elastic thin film battery, which is excellent in flexibility and can be applied to various curved surfaces, and does not cause breakage or short circuit even when twisted or pressed, thereby improving safety while improving efficiency of the thin film battery.

As the development and demand for mobile devices increases, the demand for secondary batteries as energy sources is rapidly increasing. Among them, lithium secondary batteries with high energy density and voltage, long cycle life, and low self discharge rate It is commercially used and widely used.

With the recent miniaturization and high performance of mobile devices, battery thinning has also been considered. In order to achieve a thinner battery, a technique has been proposed in which a positive electrode, a solid electrolyte, a negative electrode, and the like are formed on a predetermined substrate by a vacuum thin film forming process such as sputtering, ion plating, or vapor deposition (US Pat. US Pat. No. 4,514,14, etc.).

Usually, such a battery is formed on a substrate. Conventionally, as such a substrate, for example, one made of quartz, alumina, silicon wafer, sapphire, or the like is used. Such a substrate is excellent in heat resistance, but is generally thick and rigid, so that when mounted on a thin device (for example, an IC card, an RFID tag, etc.), if the thin device is excessively bent or twisted, Since the substrate is not flexible, the battery may break or cracks may occur in the battery. In addition, the characteristics of the battery may be degraded or the battery may not function.

Conventional thin film batteries are mostly deposited on a polymer polymer film substrate by vapor deposition, 1) depositing a current of a positive electrode and depositing a metal thin film that blocks external oxygen and moisture, and 2) a cathode active material thereon. Thin film is deposited, and 3) the solid electrolyte is coated thereon, so that the positive electrode and the negative electrode do not short-circuit and have high ion conductivity and resistivity of the positive electrode active material, and 4) deposit the negative electrode active material thin film thereon, 5) the A cathode current collector is deposited thereon, and 6) a polymer polymer film substrate is laminated thereon.

Such a thin film battery is used as a power source inserted into a device requiring flexibility such as RFID and a smart card, and the battery itself can be bent freely and be applied to a surface that is not a certain straight line so that it can be practically mounted. However, since most thin film batteries use a metal substrate, it can be used on some curved surfaces, but cannot be used when the sagging or bending is large.

Therefore, when manufacturing a thin film battery that can be applied to a non-linear surface and a narrow space to some extent, there is a limit to the applicability and economical efficiency of the thin film battery structure deposited on a metal substrate or a polymer polymer film substrate having little elasticity. .

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems of the prior art and the technical problems required from the past.

The inventors of the present application, through in-depth studies, develop a thin film substrate made of an insulating material having elasticity and flexibility, and an elastic thin film battery having a structure including a conductive layer having a network structure and a plurality of unit thin film battery cells. It has been found that such an elastic thin film battery can securely perform a function without damage even when a torsion or the like is applied while sufficiently securing the battery capacity, thus completing the present invention.

Therefore, the elastic thin film battery according to the present invention,

A pair of thin film substrates made of an insulating material having flexibility and flexibility;

A conductive layer having a network structure respectively formed on the thin film substrate; And

A plurality of unit thin film battery cells interposed between the thin film substrates in a state in which an anode and a cathode are electrically connected to the conductive layer, respectively, and having an island-like structure spaced apart from each other;

It is configured to include.

The elastic thin film battery according to the present invention is excellent in elasticity and flexibility by the above-described specific configuration, and can be applied to various curved surfaces, and does not break or short even when torsion or squeezing, thereby improving the efficiency of the thin film battery. It can improve safety.

In the elastic thin film battery of the present invention, the thin film substrate serves as a battery housing such as blocking external oxygen and moisture while providing a base on which battery elements can be mounted, such as a plastic substrate of a conventional thin film battery.

The thin film substrate is not particularly limited as long as it is an insulating material that can provide elasticity and flexibility while performing the above-described role, and preferably, may be made of a polymer resin-based material. Specific examples of such polymer resin-based materials include polyolefins, styrenic block copolymers, metallocene-catalyzed polyolefins, polyesters, polyurethanes, and polyethers. Amides (polyether amides) and the like, which may be used alone or in combination of two or more.

Due to the inherent properties of the material, the thin film substrate of the above material has a property of being restored to its original state after displacement in a constant length direction. In addition, by covalent bonding with a cross-linker to control the thermal deformation temperature of the thin film substrate, when pressed by a constant temperature, a pair of thin film substrate is laminated and finally the firm bonding strength of the covalent bond To provide.

In some cases, a barrier layer may be further applied to an outer surface of the thin film substrate exposed to external moisture, oxygen, or the like to improve hygroscopicity and anti-erosion. Polymer resins generally used for thin film substrates have a small amount over time, but tend to permeate moisture and oxygen. Such moisture and oxygen may cause side reactions in the lithium secondary battery based on the non-aqueous electrolyte, for example, and may act as a factor of degrading the performance of the battery. Specifically, the moisture introduced into the battery cell through the thin film substrate reacts with the lithium salt to generate HF, and such HF may damage the SEI of the negative electrode, causing a sudden deterioration of the battery.

Therefore, it is possible to further improve the properties over time by further applying the moisture and anti-air barrier layer as described above. The moisture and anti-air barrier layer may be formed by coating, for example, a high-density polymer material such as parylene and teflon (PTFE) on the outer surface of the thin film substrate by vapor deposition.

The conductive layers respectively formed on the thin film substrate serve to electrically connect a plurality of unit thin film battery cells forming an island array structure. Thus, the conductive layer is not particularly limited as long as it can form such an electrical connection, for example, radial, zig-zag, sinusoidal curves, and waffles. Type, honeycomb type network structure, and the like.

The network structure as described above may be preferably formed by printing a conductive material on a thin film substrate by a printing method.

In one preferred example, the network structure may be made of a structure in which at least a portion of the network structure is embedded in the thin film substrate by pressing a printed conductive material on the thin film substrate. This structure stably fixes the conductive layer to the thin film substrate to strengthen the bonding force, thereby exhibiting the effect of maintaining the bond between the conductive layer and the thin film substrate even when an external impact or twist is applied.

In the above structure, a portion in contact with the unit thin film battery cell may be a structure that is buried in the thin film substrate while forming a contact surface of a planar shape. Since the parts in contact with the battery cells are buried in the thin film substrate while forming a planar contact surface, an area that can be contacted and bonded with the unit thin film battery cells stacked thereon is further secured, thereby lowering the contact resistance of the unit thin film battery cells. In addition, even when twisting or pressing is applied to the elastic thin film battery or various curved surfaces may be maintained in a stable contact state.

As a printing method for forming a conductive material on a thin film substrate, various methods known in the art for forming a thin film may be used. Preferably, a sputtering method, a screen printing method, and a rotary screen printing method may be used. rotary screen printing method, gravure printing method, intaglio printing method, flexographic printing method, letterpress printing method, lithographic printing method Method, inkjet printing method, electrostatic printing method, offset printing method and the like can be used.

The conductive layer is not particularly limited as long as it is a material capable of exhibiting conductivity. However, in order to exhibit predetermined stretchability, the conductive layer preferably includes a conductive polymer and a conductive resin containing a conductive filler in the conductive polymer substrate. It may be made of a composite containing a filler.

Examples of the conductive polymer used as a base material in the composite with the conductive polymer include polyacetylene, polyaniline, polypyrrole, polythiophene, polysulfur nitride, and the like. Although it is possible, it is not limited only to these.

As the conductive filler, for example, carbon powder, carbon black, carbon nanotube, metal powder, or the like may be used, but is not limited thereto.

The polymer resin used as a substrate in the composite may be a known polymer resin such as polyethylene, polypropylene, polybutylene, polybutadiene, polystyrene, polyester, SBR, NBR, natural rubber, and the like.

Preferably, the conductive layer is composed of a composite in which the conductive filler is contained in the polymer resin substrate having the same or similar physical properties as the thin film substrate, so that the bonding strength of the conductive layer to the thin film substrate can be improved.

Since the electrical conductivity of the conductive layer made of such a composite is determined according to the content of the conductive filler in the composite, the higher the content of the conductive filler in the composite, the greater the electrical conductivity. In addition, as the content of the conductive filler increases, the elasticity of the conductive layer decreases, resulting in higher hardness than the thin film substrate. Therefore, when any predetermined shrinkage and tension are applied in the direction in which the conductive layer is radiated by printing, the conductive layer exhibits more displacement in the thin film substrate in which the conductive layer is less, and after the constant displacement occurs by the radial conductive layer, You will have more properties to restore.

The unit thin film battery cells are generators interposed between the thin film substrates with the anode and the cathode electrically connected to the conductive layers, respectively, and form a plurality of unit thin film battery island-shaped array structures. Therefore, even when the elastic thin film battery is contracted, stretched, or bent due to external force, the deformation caused to the unit thin film battery cells is substantially very small, and thus, the degradation of battery performance due to the increase in internal resistance can be largely suppressed. have.

In one preferred example, the unit thin film battery cells may be a structure located on the intersection of the conductive wires forming a network structure in the conductive layer. Such a structure can minimize the contact resistance between the unit thin film battery cell and the conductive layer, and greatly reduce the possibility of power failure even when deformed by external force.

The unit thin film battery cell may include, for example, a positive electrode current collector layer and a negative electrode current collector layer that respectively contact a conductive layer, a positive electrode active material layer and a negative electrode active material layer laminated on the positive electrode current collector and the negative electrode current collector, and the positive electrode, respectively. It may be made of a structure including a separator layer interposed between the active material layer and the negative electrode active material layer.

The current collector layer is a portion where electrons move in an electrochemical reaction of an active material, and the negative electrode current collector and the positive electrode current collector are divided according to the type of electrode.

The material of the positive electrode current collector and the negative electrode current collector is not particularly limited as long as it has conductivity without causing chemical change in the battery, and an electron conductive material that can be formed into a thin film may be used. For example, it is preferable to use at least one selected from the group consisting of gold, platinum, titanium, chromium, cobalt, copper, iron, aluminum, nickel, indium oxide, tin oxide, indium oxide-tin oxide, and the like. Do.

These current collectors may form fine unevenness on the surface thereof to enhance the bonding force of the electrode active material.

As the positive electrode active material, for example, lithium cobalt, lithium nickelate, lithium manganate, lithium cobalt-nickel acid, lithium cobalt-manganate, nickel-manganese acid, nickel-manganese-lithium cobalt acid, iron phosphate At least one selected from the group consisting of lithium, cobalt phosphate lithium, manganese phosphate, nickel lithium phosphate, vanadium oxide, titanium disulfide, molybdenum disulfide and the like can be preferably used.

Examples of the negative electrode active material include carbon and graphite materials such as natural graphite, artificial graphite, expanded graphite, carbon fiber, non-graphitizable carbon, carbon black, carbon nanotube, fullerene, and activated carbon; Metals such as Al, Si, Sn, Ag, Bi, Mg, Zn, In, Ge, Pb, Pd, Pt and Ti which can be alloyed with lithium and compounds containing these elements; Complexes of metals and their compounds and carbon and graphite materials; At least one selected from the group consisting of lithium-containing nitrides and the like can be preferably used. Especially, a carbon type active material, a silicon type active material, a tin type active material, or a silicon-carbon type active material is more preferable.

Island type unit thin film cells formed on the conductive layer of the network structure provide elasticity to the thin film battery, while the energy density is lower than that of the entire coating of each layer. However, this disadvantage can be solved by optimizing by adjusting factors such as the number, size, spacing, etc. of the unit thin film battery cells according to the use.

The separator layer may have a structure in which a liquid electrolyte solution is impregnated in a state in which it is combined with a positive electrode active material layer and a negative electrode active material layer, or when a solid electrolyte such as a polymer is used as the electrolyte, the solid electrolyte may be a solid electrolyte layer that also serves as a separator.

For example, the liquid electrolyte may be configured to include a lithium salt in an electrolyte solvent. The electrolyte solvent may be N-methyl-2-pyrrolidinone, propylene carbonate, ethylene carbonate, butylene carbonate, dimethyl carbonate, diethyl carbonate, gamma-butylo lactone, 1, 2-dimethoxy ethane, tetrahydroxy franc, 2-methyl tetrahydrofuran, dimethyl sulfoxide, 1,3-dioxolon, formamide, dimethylformamide, dioxolon, acetonitrile, nitromethane , Methyl formate, methyl acetate, phosphate triester, trimethoxy methane, dioxoron derivative, sulfolane, methyl sulfolane, 1,3-dimethyl-2-imidazolidinone, propylene carbonate derivative, tetrahydrofuran Aprotic organic solvents such as derivatives, ethers, methyl pyroionate, ethyl propionate and the like can be used, preferably a mixture of linear and cyclic carbonates can be used. The lithium salt is a material that is easily dissolved in the electrolyte solvent, for example, LiCl, LiBr, LiI, LiClO ₄ , LiBF ₄ , LiB ₁₀ Cl ₁₀ , LiPF ₆ , LiCF ₃ SO ₃ , LiCF ₃ CO ₂ , LiAsF ₆ , LiSbF ₆ , LiAlCl ₄ , CH ₃ SO ₃ Li, CF ₃ SO ₃ Li, (CF ₃ SO ₂ ) ₂ NLi, chloroborane lithium, lower aliphatic lithium carbonate, lithium phenyl borate, imide and the like can be used. .

As the solid electrolyte, a solid electrolyte material that can be formed into a thin film can be used. When the battery is a lithium secondary battery, for example, lithium nitride phosphate (Li _x PO _y N _z ), titanium lithium phosphate (LiTi ₂ (PO ₄ ) ₃ ), germanium lithium phosphate (LiGe ₂ (PO ₄ ) ₃ ), Li ₂ O-SiO ₂ , Li ₃ PO ₄ -Li ₄ SiO ₄ , Li ₂ OV ₂ O ₅ -SiO ₂ , Li ₂ OP ₂ O ₅ -B ₂ O ₃ , Li ₂ O-GeO ₂ , Li ₂ S-SiS A solid electrolyte comprising at least one selected from the group consisting of ₂ , Li ₂ S-GeS ₂ , Li ₂ S-GeS ₂ -Ga ₂ S ₃ , Li ₂ SP ₂ S ₅ , and Li ₂ SB ₂ S ₃ . Can be used as In addition, in these two kinds of elements or halide of lithium, such as _{LiI, Li 3 PO 4, LiPO} 3, Li 4 SiO 4, Li 2 SiO 3, it may be used to dope the LiBO ₂ or the like. In addition, these solid electrolytes may be crystalline, amorphous, or glassy.

Since the unit thin film battery cells form an island-like array structure spaced apart from each other, the spaces spaced therebetween may remain empty, but preferably, may be a structure in which an insulating polymer resin or a resin composite is filled. In this case, the polymer may be the same as the material of the thin film substrate.

The present invention also provides a method of manufacturing the elastic thin film battery. The elastic thin film battery according to the present invention can be manufactured by various methods, one preferred example will be described below.

(a) preparing first and second thin film substrates;

(b) printing the conductive layer on the first and second thin film substrates in a printing manner, respectively;

(c) A plurality of unit thin film battery cells are mounted by sequentially stacking a positive electrode current collector layer, a positive electrode active material layer, a separator layer, a negative electrode active material layer, and a negative electrode current collector layer on the first thin film substrate on which the conductive layer is formed. step; And

(d) stacking a second thin film substrate having a conductive layer formed on the first thin film substrate on which the unit thin film battery cells are mounted;

It may be prepared by a method comprising a.

In step (a) the first and second thin film substrates can be produced, for example, by extrusion. In some cases, the extruded sheet may be stretched at a predetermined ratio. The thickness of the thin film base material can be appropriately determined in consideration of conditions in the field in which the elastic thin film battery is used.

In step (b), the conductive layer is printed on the first and second thin film substrates by printing, respectively, as described above.

The mounting of the unit thin film cells of step (c) may also be preferably performed by a printing method.

The printing method in steps (b) and (c) simplifies the overall process for the manufacture of the elastic thin film cell, allowing mass production at low manufacturing costs.

Preferably, after the step (d) of laminating the second thin film substrate having the conductive layer formed on the first thin film substrate on which the unit thin film battery cells are mounted, the first thin film substrate and the second thin film substrate are laminated. The final elastic thin film cell can be produced. The lamination process is performed by thermocompression bonding of a first thin film substrate on which unit thin film battery cells are mounted and a second thin film substrate on which an upper conductive layer is formed.

In one preferred example, after step (d), the step of pressing the laminate may be further performed.

 At this time, by the deformation of the thin film substrate by a certain amount of heat, the insulating polymer resin or resin composite derived from the thin film substrate may be filled in spaces spaced apart from each other between the unit thin film battery cells.

Injecting the electrolyte in the elastic thin film battery of the structure impregnated with the liquid electrolyte may be carried out under appropriate conditions.

For example, after the step (d), by pressing the parts except the one end or both ends of the outer peripheral surface of the laminate, injecting the liquid electrolyte through the non-adhesive portion, and further performing the step of sealing can do.

In some cases, after the step (d), by pressing the parts except the virtual strips connecting the unit thin film battery cells in the laminate, and injecting the electrolyte through the non-adhesive strips, sealing Can be performed further. That is, in the laminate in which the unit thin film battery cells are interposed between the thin film substrates, a condition in which a non-adhesive strip corresponding to the channel is made to form a channel through which the electrolyte can be injected into each unit thin film battery cells is formed. The laminate may be press-contacted to each other, and the electrolyte may be continuously injected into the unit thin film battery cells through the adhesive strip, and then the final sealing may be performed.

In addition, after the final sealing as described above, the process of applying the moisture and anti-air barrier layer on the outer surface exposed to the oxygen, moisture, etc. in the thin film substrate may be further performed. Details of the moisture and air barrier layer are as described above.

The elastic thin film battery according to the present invention can be used in various forms.

For example, the elastic thin film battery may form a heat generation / cooling device in which a heat resistant material or a thermoelectric material is combined. The heating / cooling device can be applied as a heating pad, a cooling pad, or an energy pad for recovering heat.

Hereinafter, the present invention will be further described with reference to the drawings and the like, but the scope of the present invention is not limited thereto.

1 is a view schematically showing an elastic thin film battery according to an embodiment of the present invention, Figure 2 is a schematic cross-sectional view of the elastic thin film battery of FIG.

1 and 2, the elastic thin film battery 100 according to the present invention is formed of a plurality of layers are laminated, a plurality of unit thin film battery cells forming an island-like array structure spaced apart from each other ( 500 has a structure in which the conductive layers 130 and 140 of the network structure are electrically connected.

Each layer of the elastic thin film battery 100 includes a thin film substrate 110, a lower conductive layer 130, a negative electrode current collector thin film layer 200, a negative electrode active material thin film layer 210, and an electrolyte thin film layer (from bottom to top). 300, the positive electrode active material thin film layer 410, the positive electrode current collector thin film layer 400, the upper conductive layer 140, the thin film substrate 120, and the spaced space layer 150 between the unit thin film battery cells.

A portion of the material forming the thin film substrates 110 and 120 may be introduced and filled into the spaced space layer 150 in the process of thermally compressing the lamination structure.

3 illustrates a process of laminating a conductive layer on a thin film substrate during an assembly process of an elastic thin film battery according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the upper and lower conductive layers 140 and 130 are formed of a composite in which a conductive filler is contained in a polymer of a material such as the thin film substrates 120 and 110, and the thin film substrates 110 and 120 have a network structure. After printing on each of the)) and the thermocompression bonding is integrated with the thin film substrate (110, 120). In this regard, referring to FIG. 2, the upper and lower conductive layers 140 and 130 having a network structure penetrate into the thin film substrates 110 and 120, and a portion contacting the current collector thin film layers 200 and 400. It can be seen that the plane is maintained.

4 schematically illustrates an assembly process of an elastic thin film battery according to an exemplary embodiment of the present invention.

The unit thin film battery cell is composed of the current collector thin film layers 200 and 400, the electrode active material thin film layers 210 and 410, and the electrolyte thin film layer 300. → 410 → 400) can be produced by forming sequentially by a printing method.

After forming the anode current collector thin film layer 400 by the printing method, the inner composite layers 110, 130, 200, 210, 300, 410, 400 and the outer layers 140, 120 are laminated to elasticity. The thin film battery (FIG. 1: 100) is completed.

The completed elastic thin film battery 100 has a plurality of unit thin film battery cells connected to a conductive mesh network of a radial mesh in a laminated and enclosed film layer, so that the elastic thin film battery 100 has a flexible and detachable / attachable function on various curved surfaces. The elastic thin film battery can be applied not only to a primary battery but also to a lithium ion secondary battery capable of charging and discharging.

5 illustrates an elastic thin film battery according to another embodiment of the present invention.

Referring to FIG. 5, in the manufacturing process according to the embodiment of FIG. 4, the elastic thin film battery 101 is pressed against a portion except for one end 602 or both ends of the outer circumferential surface 601 of the stack 600. After injecting the liquid electrolyte through a portion not in close contact, the non-adherent end portion 602 of the laminate 101 is sealed.

6 illustrates an elastic thin film battery according to another embodiment of the present invention.

Referring to FIG. 6, in the manufacturing process according to the embodiment of FIG. 4, the elastic thin film battery 102 may include virtual strips 603 connecting the unit thin film battery cells 500 to the stack 600. Except for pressing the portion 604, the electrolyte is injected through the hermetic strips 603, and then manufactured by sealing the outer peripheral surface 601 of the laminate 600. That is, the method of injecting the electrolyte differs from FIG. 5 in that the non-attached strips 603 are used as a kind of electrolyte injection channel.

As described above, the elastic thin film battery according to the present invention includes a pair of thin film substrates made of an insulating material having flexibility and flexibility, and a conductive layer having a network structure formed on each of the thin film substrates; And since it is composed of a plurality of unit thin film battery cells forming an island-like array structure spaced apart from each other, excellent elasticity compared to the conventional thin film battery is stable against external impact or torsion, etc., and is applicable to structures of various shapes It is possible.

In addition, the elastic thin film battery according to the present invention can be mass-produced by reducing the manufacturing cost by networking the unit thin film battery cells in the printing process.

Those skilled in the art to which the present invention pertains will be able to make various applications and modifications within the scope of the present invention based on the above contents.

1 is a schematic diagram of an elastic thin film battery according to an embodiment of the present invention;

2 is a cross-sectional view of the elastic thin film battery of FIG. 1;

3 is a view showing a process of laminating a conductive layer on a thin film substrate according to one embodiment of the present invention;

4 is a schematic diagram showing a manufacturing process according to an embodiment of the present invention;

5 is a schematic view of an elastic thin film battery according to another embodiment of the present invention;

6 is a schematic view of an elastic thin film battery according to another embodiment of the present invention.

Claims (23)

A pair of thin film substrates made of an insulating material having flexibility and flexibility; A conductive layer having a network structure respectively formed on the thin film substrate; And A plurality of unit thin film battery cells interposed between the thin film substrates in a state in which an anode and a cathode are electrically connected to the conductive layer, respectively, and having an island-like structure spaced apart from each other; Elastic thin film battery, characterized in that consisting of a structure comprising a. The elastic thin film battery of claim 1, wherein the thin film substrate is made of a polymer resin-based material. According to claim 2, The material of the thin film substrate is a polyolefin, styrenic block copolymer (styrenic block copolymer), metallocene catalyst-based polyolefin (metallocene-catalyzed polyolefins), polyester (polyesters), polyurethane (polyurethanes), And one or more combinations selected from the group consisting of polyether amides. The elastic thin film battery according to claim 2, wherein a moisture and an anti-barrier barrier layer is further applied to an outer surface of the thin film substrate exposed to external moisture or oxygen. The elastic layer of claim 1, wherein the conductive layer has a radial, zig-zag type, sinusoidal curves type, waffle type, or honeycomb type network structure. Thin film battery. The elastic thin film battery according to claim 1, wherein the conductive layer is made of a conductive polymer, a composite containing a filler in the conductive polymer substrate, or a composite containing a conductive filler in the polymer resin substrate. The elastic thin film battery according to claim 1, wherein the conductive layer is formed by printing a conductive material on a thin film substrate by a printing method. The elastic thin film battery according to claim 7, wherein the conductive layer is pressed after printing on the thin film substrate to form at least a portion of the conductive layer embedded in the thin film substrate. The elastic thin film battery of claim 8, wherein the conductive layer is buried in the thin film substrate while a portion in contact with the unit thin film battery cell forms a planar contact surface. The method of claim 7, wherein the printing method is a sputtering method, a screen printing method, a rotary screen printing method, a gravure printing method, an intaglio printing method. Method, flexographic printing method, letterpress printing method, lithographic printing method, inkjet printing method, electrostatic printing method, and offset Elastic thin film battery, characterized in that selected among the printing (offset printing) method  The elastic thin film battery of claim 1, wherein the unit thin film battery cell is positioned on an intersection of conductive wires forming a network structure in the conductive layer. The method of claim 1, wherein the unit thin film battery cell, the positive electrode current collector layer and the negative electrode current collector layer in contact with the conductive layer, respectively, the positive electrode active material layer and the negative electrode active material layer laminated on the positive electrode current collector and the negative electrode current collector, respectively, An elastic thin film battery having a structure including a separator layer interposed between a positive electrode active material layer and a negative electrode active material layer. The elastic thin film battery according to claim 12, wherein a liquid electrolyte solution is impregnated with the separator layer bonded to the positive electrode active material layer and the negative electrode active material layer. The elastic thin film battery according to claim 12, wherein the separator layer is a solid electrolyte layer. The elastic thin film battery of claim 1, wherein an insulating polymer resin or a resin composite is filled in spaced spaces between the unit thin film battery cells. The elastic thin film battery of claim 15, wherein a material filled in the separation space between the unit thin film battery cells is the same as a material of the thin film substrate. A method of manufacturing the elastic thin film battery according to any one of claims 1 to 16, (a) preparing first and second thin film substrates; (b) printing the conductive layer on the first and second thin film substrates in a printing manner, respectively; (c) A plurality of unit thin film battery cells are mounted by sequentially stacking a positive electrode current collector layer, a positive electrode active material layer, a separator layer, a negative electrode active material layer, and a negative electrode current collector layer on the first thin film substrate on which the conductive layer is formed. step; And (d) stacking a second thin film substrate having a conductive layer formed on the first thin film substrate on which the unit thin film battery cells are mounted; Manufacturing method characterized in that consisting of a configuration comprising a. 18. The process according to claim 17, wherein after step (d), further pressurizing the laminate. 18. The method of claim 17, wherein after step (d), a portion of the laminate except for one end or both ends of the outer circumferential surface is pressed to be in close contact with each other, and a liquid electrolyte solution is injected through the uncontacted portion, and then the sealing step is further added. Manufacturing method characterized in that it comprises a. 18. The method of claim 17, wherein after step (d), a portion of the laminate, except for imaginary strips connecting unit thin film battery cells, is pressed and adhered to each other, the electrolyte is injected through the non-adherent strips, and then sealed. The method according to claim 1, further comprising the step. 21. A method according to claim 19 or 20, further comprising, after said final sealing, applying an anti-humidity and an anti-air barrier layer to the outer surface of the thin film substrate exposed to external moisture or oxygen. The heat generating / cooling device according to any one of claims 1 to 16, wherein the elastic thin film battery is combined with a heat resistant material or a thermoelectric material. The heat generating / cooling device according to claim 22, wherein the heat generating / cooling device is a heat generating pad, a cooling pad, or an energy pad for recovering heat.

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