Hollow packaging for cable-type secondary battery, and cable-type secondary battery comprising same

Patent metadata

Field	Value
Publication number	US-10211432-B2
Application number	US-201515124459-A
Country	US
Kind code	B2
Filing date	Jun 19, 2015
Priority date	Jun 19, 2014
Publication date	Feb 19, 2019
Grant date	Feb 19, 2019

Abstract

The present invention relates to a hollow packaging for a cable-type secondary battery and a cable-type secondary battery comprising same, and more specifically, to a hollow packaging for a cable-type secondary battery and a cable-type secondary battery comprising same, wherein the hollow packaging for a cable-type secondary battery comprises a packaging sheet including a sheet-type thin metal layer provided with a corrugated pattern on the surface, a first polymer resin layer formed on one surface of the thin metal layer, and a mechanical support layer formed on the other surface of the thin metal layer, wherein the packaging sheet forms a hollow space by bending so that the first polymer resin layer faces inward.

First claim

What is claimed is:

1. A hollow packaging for a cable-type secondary battery, comprising:
a packaging sheet comprising:
a sheet-type metal foil layer having a pattern with a corrugated structure formed on a surface thereof;
a first polymer resin layer formed on one surface of the metal foil layer;
a mechanical support layer formed on the other surface of the metal foil layer; and
a second polymer resin layer formed on an upper surface of the mechanical support layer,

wherein the packaging sheet has a hollow by bending such that the first polymer resin layer faces inward,
wherein the hollow packaging for a cable-type secondary battery is formed by bending the packaging sheet such that one end of the first polymer resin layer and one end of the second polymer resin layer are adhered to each other and sealing the packaging sheet.

2. The hollow packaging for a cable-type secondary battery according to claim 1 , wherein the pattern with a corrugated structure is formed in a lengthwise direction of the packaging for a cable-type secondary battery.

3. The hollow packaging for a cable-type secondary battery according to claim 1 , wherein the metal foil layer is any one selected from the group consisting of iron (Fe), carbon (C), chrome (Cr), manganese (Mn), nickel (Ni), copper (Cu), aluminum (Al) and equivalents thereof, or alloys thereof.

4. The hollow packaging for a cable-type secondary battery according to claim 1 , wherein the first polymer resin layer is made of any one selected from the group consisting of polyolefin-based resin, polyester-based resin, polyamide-based resin and fluoro-based resin, or mixtures thereof.

5. The hollow packaging for a cable-type secondary battery according to claim 1 , wherein the first polymer resin layer further comprises hydrophobic inorganic particles.

6. The hollow packaging for a cable-type secondary battery according to claim 5 , wherein the hydrophobic inorganic particles are any one selected from the group consisting of SiO 2 , Al 2 O 3 , MgO, BaTiO 3 , ZrO 2 and ZnO or mixtures thereof.

7. The hollow packaging for a cable-type secondary battery according to claim 5 , wherein the hydrophobic inorganic particles have an average particle size of from 1 nm to 5 μm.

8. The hollow packaging for a cable-type secondary battery according to claim 1 , wherein the mechanical support layer is formed of any one selected form the group consisting of high density polyethylene, low density polyethylene, linear low density polyethylene, ultra high molecular weight polyethylene, polypropylene, polyethyleneterephthalate, polybutyleneterephthalate, polyester, polyacetal, polyamide, polycarbonate, polyimide, polyetheretherketone, polyethersulfone, polyphenyleneoxide, polyphenylenesulfide and polyethylenenaphthalate, or mixtures thereof.

9. The hollow packaging for a cable-type secondary battery according to claim 1 , wherein the second polymer resin layer is made of any one selected from the group consisting of polyolefin-based resin, polyester-based resin, polyamide-based resin and fluoro-based resin, or mixtures thereof.

10. A cable-type secondary battery, comprising:
a hollow packaging comprising:
an electrode assembly extending in a lengthwise direction, the electrode assembly comprising: an inner current collector, an inner electrode active material layer, an outer electrode active material layer, an electrolyte layer interposed between the inner electrode active material layer and the outer electrode active material layer, and an outer current collector thin film formed outside of the outer electrode active material layer; and
a hollow part into which the electrode assembly is inserted, wherein the hollow packaging is formed around and in close contact with an outer surface of the electrode assembly inserted into the hollow part,
wherein the hollow packaging is the hollow packaging for a cable-type secondary battery defined in claim 1 .

11. The cable-type secondary battery according to claim 10 , wherein the outer current collector thin film is in half pipe or mesh shape.

12. The cable-type secondary battery according to claim 10 , wherein the outer current collector thin film is made of stainless steel, aluminum, nickel, titanium, sintered carbon, copper; stainless steel surface-treated with carbon, nickel, titanium or silver; an aluminum-cadmium alloy; a non-conductive polymer surface-treated with a conductive material; or a conductive polymer.

13. The cable-type secondary battery according to claim 10 , wherein the inner current collector is made of stainless steel, aluminum, nickel, titanium, sintered carbon, copper; stainless steel surface-treated with carbon, nickel, titanium or silver; an aluminum-cadmium alloy; a non-conductive polymer surface-treated with a conductive material; or a conductive polymer.

14. The cable-type secondary battery according to claim 10 , wherein any one of the inner electrode active material layer and the outer electrode active material layer comprises active material particles of any one selected from the group consisting of natural graphite, artificial graphite, a carbonaceous material; lithium-containing titanium composite oxide (LTO), and metals (Me) including Si, Sn, Li, Zn, Mg, Cd, Ce, Ni or Fe; alloys consisting of the metals (Me); oxides (MeOx) of the metals (Me); and composites of the metals (Me) and carbon, or mixtures thereof.

15. The cable-type secondary battery according to claim 10 , wherein any one of the inner electrode active material layer and the outer electrode active material layer comprises active material particles of any one selected from the group consisting of LiCoO 2 , LiNiO 2 , LiMn 2 O 4 , LiCoPO 4 , LiFePO 4 , LiNiMnCoO 2 and LiNi 1-x-y-z Co x M1 y M2 z O 2 (M1 and M2 are each independently any one selected from the group consisting of Al, Ni, Co, Fe, Mn, V, Cr, Ti, W, Ta, Mg and Mo, and x, y and z are each independently atomic fractions of elements in an oxide composition, in which 0<x<0.5, 0<y<0.5, 0<z<0.5, x+y+z≤1), or mixtures thereof.

16. The cable-type secondary battery according to claim 10 , wherein the electrolyte layer comprises an electrolyte selected from:
a gel-type polymer electrolyte using PEO, PVdF, PMMA, PAN or PVAc; and
a solid electrolyte using PEO, polypropylene oxide (PPO), polyethylene imine (PEI), polyethylene sulphide (PES) or polyvinyl acetate (PVAc).

17. A cable-type secondary battery, comprising:
a hollow packaging comprising:
an electrode assembly extending in a lengthwise direction, the electrode assembly comprising: a lithium ion supplying core containing an electrolyte, an inner electrode comprising at least one wire-type inner current collector wound around an outer surface of the lithium ion supplying core and an inner electrode active material layer formed on a surface of the wire-shaped inner current collector, a separation layer formed around an outer surface of the inner electrode to prevent a short of the electrode, and a wound sheet-type outer electrode formed around an outer surface of the separation layer and comprising an outer current collector and an outer electrode active material layer formed on at least one surface of the outer current collector, and
a hollow part into which the electrode assembly is inserted, wherein the hollow packaging is formed around and in close contact with an outer surface of the electrode assembly inserted into the hollow part,

wherein the hollow packaging is the hollow packaging for a cable-type secondary battery defined in claim 1 .

Assignees

• Lg Chemical Ltd

Inventors

• Kwon Yo-Han
• Jung Hye-Ran
• Kim Je-Young
• Kim Seok-Koo

Classifications

• H01M4/661

  Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M4/76

  Containers for holding the active material, e.g. tubes, capsules · CPC title

• H01M10/052

  Li-accumulators · CPC title