Non-aqueous electrolyte battery having porous polymer layer between laminate film and battery device

Patent metadata

Field	Value
Publication number	US-9947959-B2
Application number	US-201113290709-A
Country	US
Kind code	B2
Filing date	Nov 7, 2011
Priority date	Nov 17, 2010
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A non-aqueous electrolyte battery includes a battery device in which a positive electrode is faced to negative electrode through a separator; a non-aqueous electrolyte; a laminate film which is formed by laminating a metal layer, an outside resin layer formed in outer face of the metal layer, and an inside resin layer formed in the metal layer, and in which the battery device and the non-aqueous electrolyte is packaged by heat welding and housed; a positive electrode lead which is electrically connected to the positive electrode, and drawn from portion heat-welded of the laminate film to an exterior thereof; a negative electrode lead which is electrically connected to the negative electrode, and drawn from portion heat-welded of the laminate film to an exterior thereof; and a porous polymer layer containing, as a component, vinylidene fluoride formed between the laminate film and the battery device.

First claim

The application is claimed as follows:

1. A non-aqueous electrolyte battery, comprising:
a battery device comprising a positive electrode, a negative electrode, and a separator formed between the positive electrode and the negative electrode;
a non-aqueous electrolyte;
a laminate film housing the non-aqueous electrolyte and the battery device, the laminate film comprising a metal layer, an outside resin layer formed on an outer face of the metal layer, and an inside resin layer formed on the metal layer;
a positive electrode lead electrically connected to the positive electrode and drawn through a portion of the laminate film to an exterior thereof;
a negative electrode lead electrically connected to the negative electrode and drawn through a portion of the laminate film to an exterior thereof; and
a porous polymer layer formed between the laminate film and the battery device and containing vinylidene fluoride as a component,
wherein the porous polymer layer comprises a non-aqueous solvent, wherein the porous polymer layer has a weight-average molecular weight of equal to or more than 500,000 and equal to or lower than 1,500,000,
wherein the porous polymer layer is a copolymer containing, as a repetition unit, at least one of polyvinylidene fluoride (PVdF), vinylidene fluoride (VdF), hexafluoropropylene (HFP), trifluoroethylene (TFE) and chlorotrifluoroethylene (CTFE),
wherein a thickness of the porous polymer layer is equal to or more than 1.0 μm and equal to or lower than 5.0 μm,
wherein the porous polymer layer contains inorganic particles, wherein the inorganic particles are selected from the group consisting of alumina (Al 2 O 3 ), magnesia (MgO), titania (TiO 2 ), zirconia (ZrO 2 ), silica (SiO 2 ), silicon nitride (Si 3 N 4 ), aluminum nitride (AlN), boron nitride (BN), titanium nitride (TiN), silicon carbide (SiC), boron carbide (B 4 C), and a combination thereof, and
wherein the porous polymer layer is integrally formed with and entirely covers both opposed faces of the separator.

2. The non-aqueous electrolyte battery according to claim 1 , wherein the inside resin layer of the laminate film is roughened.

3. The non-aqueous electrolyte battery according to claim 1 , wherein the positive electrode and the negative electrode of the battery device are alternately laminated through a separator such that the separator is the outermost layer.

4. The non-aqueous electrolyte battery according to claim 1 , wherein a discharge capacity of the battery is equal to or more than 3 Ah and equal or less than 50 Ah and thickness is equal to or higher than 5 mm and equal to or lower than 20 mm.

5. The non-aqueous electrolyte battery according to claim 1 , wherein the non-aqueous electrolyte is a gel electrolyte.

6. The non-aqueous electrolyte battery according to claim 1 , wherein the porous layer consists of the non-aqueous solvent, an electrolyte salt and a copolymer containing the vinylidene fluoride component and at least one other monomer component.

7. The non-aqueous electrolyte battery according to claim 1 , comprising a positive electrode lead and a negative electrode lead, wherein a thickness of at least one of the positive electrode lead and the negative electrode lead ranges from 150 μm to 250 μm.

8. The non-aqueous electrolyte battery according to claim 1 , wherein the outside resin layer has a higher melting point than that of the inside resin layer.

9. The non-aqueous electrolyte battery according to claim 8 , wherein the outside resin layer is selected from a group consisting of polyolefine-based resin, polyimide-based resin, polyethylene naphthalate (PEN) and polybutylene naphthalate (PBN).

10. The non-aqueous electrolyte battery according to claim 1 , wherein a separator is bent in a zigzag shape and the positive electrode and the negative electrode are alternately laminated through the separator.

11. The non-aqueous electrolyte battery according to claim 1 , wherein the copolymer contains hexafluoropropylene (HFP).

12. The non-aqueous electrolyte battery according to claim 1 , wherein the copolymer contains trifluoroethylene (TFE).

13. The non-aqueous electrolyte battery according to claim 1 , wherein the copolymer contains chlorotrifluoroethylene (CTFE).

14. The non-aqueous electrolyte battery according to claim 1 , wherein the copolymer is selected from the group consisting of a copolymer containing polyvinylidene fluoride (PVdF), vinylidene fluoride (VdF), and hexafluoropropylene (HFP) as a repetition unit, and a copolymer containing, vinylidene fluoride (VdF), hexafluoropropylene (HFP), and chlorotrifluoroethylene (CTFE) as a repetition unit.

15. The non-aqueous electrolyte battery according to claim 1 , wherein the laminate film further comprises an adhesion layer between the outside resin layer and the metal layer, and an adhesion layer between the inside resin layer and the metal layer, with both adhesion layers having a thickness of equal to or higher than 2 μm and equal to or lower than 7 μm.

16. The non-aqueous electrolyte battery according to claim 1 , wherein the negative electrode has an active material layer, wherein the active material layer CoSnC-containing materials containing tin (Sn), cobalt (Co) and carbon (C) as configuration elements, in which the content of carbon (C) is in the range of equal to or more than 9.9% by mass and equal to or less than 29.7% by mass, a ratio (Co/(Sn+Co)) of cobalt (Co) to the sum of tin (Sn) and cobalt (Co) is in the range of equal to or more than 30% by mass and equal to or less than 70% by mass.

17. A non-aqueous electrolyte battery, comprising:
a battery device comprising a positive electrode, a negative electrode, and a separator formed between the positive electrode and the negative electrode;
a non-aqueous electrolyte;
a laminate film enclosing the non-aqueous electrolyte and the battery device, the laminate film comprising a metal layer having a thickness of 30 μm to 150 μm, an outside resin layer formed on an outer face of the metal layer and having a thickness of 25 μm to 35 μm, and an inside resin layer formed on the metal layer and having a thickness of 20 μm to 50 μm;
a positive electrode lead electrically connected to the positive electrode and drawn through a portion of the laminate film to an exterior thereof;
a negative electrode lead electrically connected to the negative electrode and drawn through a portion of the laminate film to an exterior thereof; and
a porous polymer layer formed between the laminate film and the battery device and containing vinylidene fluoride as a component,
wherein the porous polymer layer comprises a non-aqueous solvent,
wherein the porous polymer layer has a weight-average molecular weight of equal to or more than 500,000 and equal to or lower than 1,500,000,
wherein the porous polymer layer is a copolymer containing, as a repetition unit, at least one of polyvinylidene fluoride (PVdF), vinylidene fluoride (VdF), hexafluoropropylene (HFP), trifluoroethylene (TFE) and chlorotrifluoroethylene (CTFE),
wherein a thickness of the porous polymer layer is equal to or more than 1.0 μm and equal to or lower than 5.0 μm,
wherein the porous polymer layer contains inorganic particles, wherein the inorganic particles are selected from the group consisting of alumina (Al 2 O 3 ), magnesia (MgO), titania (TiO 2 ), zirconia (ZrO 2 ), silica (SiO 2 ), silicon nitride (Si 3 N 4 ), aluminum nitride (AlN), boron nitride (BN), titanium nitride (TiN), silicon carbide (SiC), boron carbide (B 4 C), and a combination thereof, and
wherein the porous polymer layer is integrally for

Assignees

• Nakamura Tomoyuki
• Takabayashi Hiroshi
• Hayashi Kunihiko
• Konishi Yosuke
• Makino Tetsuya
• Murata Manufacturing Co

Inventors

• Nakamura Tomoyuki
• Takabayashi Hiroshi
• Hayashi Kunihiko
• Konishi Yosuke
• Makino Tetsuya

Classifications

• H01M50/133

  Thickness · CPC title

• H01M50/129

  with two or more layers of only organic material · CPC title

• H01M50/119

  Metals · CPC title

• H01M50/121

  Organic material · CPC title

• H01M2/0287

  Electricity · mapped topic