Nonaqueous electrolyte battery, battery pack and vehicle

Patent metadata

Field	Value
Publication number	US-2017271663-A1
Application number	US-201715428411-A
Country	US
Kind code	A1
Filing date	Feb 9, 2017
Priority date	Mar 16, 2016
Publication date	Sep 21, 2017
Grant date	—

Abstract

According to one embodiment, a nonaqueous electrolyte battery is provided. The nonaqueous electrolyte battery includes a positive electrode, a negative electrode and a gel nonaqueous electrolyte. The negative electrode includes a negative electrode active material-containing layer including a titanium-containing oxide. At least a part of the gel nonaqueous electrolyte is held in the negative electrode active material-containing layer. A ratio of E 1 /E 2 is within a range of 0.1≦E 1 /E 2 ≦0.8. E 1 is a content of the gel nonaqueous electrolyte in a first part. E 2 is a content of the gel nonaqueous electrolyte in a second part. The first and second parts are parts of the negative electrode active material-containing layer.

First claim

What is claimed is:

1 . A nonaqueous electrolyte battery comprising:
a positive electrode; a negative electrode comprising a negative electrode current collector and a negative electrode active material-containing layer which is formed on the negative electrode current collector and comprises a titanium-containing oxide, the negative electrode active material-containing layer comprising a first surface facing the positive electrode and a second surface facing the negative electrode current collector; and a gel nonaqueous electrolyte; wherein at least a part of the gel nonaqueous electrolyte is held in the negative electrode active material-containing layer, the negative electrode active material-containing layer comprises a first part having a depth of 0.1T from the first surface, and a second part having a depth of 0.1T from the second surface, where T is a thickness from the first surface to the second surface of the negative electrode active material-containing layer, and the nonaqueous electrolyte battery satisfies a ratio of E 1 /E 2 within a range of 0.1≦E 1 /E 2 ≦0.8, E 1 is a content of the gel nonaqueous electrolyte in the first part and E 2 is a content of the gel nonaqueous electrolyte in the second part.

2 . The nonaqueous electrolyte battery according to claim 1 , wherein the gel nonaqueous electrolyte comprises at least one selected from the group consisting of a polyvinylidene fluoride, a polyacrylonitrile, a polymethyl methacrylate, and a polyethylene oxide.

3 . The nonaqueous electrolyte battery according to claim 1 , wherein the titanium-containing oxide comprises at least one selected from the group consisting of a Na-containing niobium-titanium composite oxide having an orthorhombic crystal structure, a niobium-titanium composite oxide having a monoclinic crystal structure, and a titanium-containing oxide having a monoclinic β-type crystal structure.

4 . The nonaqueous electrolyte battery according to claim 1 , wherein the titanium-containing oxide comprises a lithium titanate having a spinel-type crystal structure, and at least one selected from the group consisting of the Na-containing niobium-titanium composite oxide having the orthorhombic crystal structure, the niobium-titanium composite oxide having the monoclinic crystal structure, and the titanium-containing oxide having the monoclinic β-type crystal structure.

5 . The nonaqueous electrolyte battery according to claim 1 , wherein the titanium-containing oxide comprises the Na-containing niobium-titanium composite oxide having the orthorhombic crystal structure, the Na-containing niobium-titanium composite oxide is represented by the general formula of Li 2+v Na 2−w M1 x Ti 6−y−z Nb y M2 z O 14+δ , wherein M1 is at least one metal element selected from the group consisting of Cs, K, Sr, Ba, Mg and Ca; M2 is at least one element selected from the group consisting of Al, Sn, V, Ta, Mo, W, Fe, Co and Mn; 0≦v≦4; 0<w<2; 0≦x<2; 0<y<6; 0≦z<3; and −0.5≦δ≦0.5.

6 . The nonaqueous electrolyte battery according to claim 1 , further comprising a liquid nonaqueous electrolyte, and at least a part of the liquid nonaqueous electrolyte is held in the negative electrode active material-containing layer.

7 . The nonaqueous electrolyte battery according to claim 1 , wherein the positive electrode comprises at least one selected from the group consisting of a lithium-cobalt composite oxide, a lithium-nickel-cobalt-manganese composite oxide, a lithium-manganese composite oxide having a spinel-type crystal structure, and a lithium-manganese-iron composite phosphate having a olivine-type crystal structure.

8 . A battery pack comprising the nonaqueous electrolyte battery according to claim 1 .

9 . The battery pack according to claim 8 , further comprising:
an external power distribution terminal; and a protective circuit.

10 . A battery pack comprising nonaqueous electrolyte batteries each according to claim 1 ,
wherein the nonaqueous electrolyte batteries are electrically connected in series, in parallel, or in combination of series and parallel.

11 . A vehicle comprising the battery pack according to claim 8 .

12 . The vehicle according to claim 11 , wherein the battery pack is configured to recover a regenerative energy of a power of the vehicle.

Assignees

• Toshiba Kk

Inventors

• Hoshina Keigo
• Harada Yasuhiro
• Takami Norio

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M10/0565 Primary

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

• H01M4/131

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title