Secondary battery, battery pack, and vehicle

Patent metadata

Field	Value
Publication number	US-2017271717-A1
Application number	US-201715457335-A
Country	US
Kind code	A1
Filing date	Mar 13, 2017
Priority date	Mar 16, 2016
Publication date	Sep 21, 2017
Grant date	—

Abstract

According to one embodiment, a secondary battery including a positive electrode, a negative electrode, and an electrolyte solution is provided. The negative electrode includes a negative electrode current collector, and a negative electrode mixed-materials layer disposed on the negative electrode current collector. The negative electrode current collector has a carbon-including coating layer on at least a part of the surface thereof. The negative electrode mixed-materials layer includes a negative electrode active material including a titanium-including oxide. The electrolyte solution includes an aqueous solvent and an electrolyte.

First claim

What is claimed is:

1 . A secondary battery comprising:
a positive electrode; a negative electrode which includes a negative electrode current collector having a carbon-including coating layer on at least a part of a surface thereof, and a negative electrode mixed-materials layer disposed on the negative electrode current collector, the negative electrode mixed-materials layer including a negative electrode active material that includes a titanium-including oxide; and an electrolyte solution including an aqueous solvent and an electrolyte.

2 . The secondary battery according to claim 1 , wherein the carbon-including coating layer has a thickness of 10 nm to 3 μm.

3 . The secondary battery according to claim 1 , wherein the carbon-including coating layer includes carbon in an amount of 60% by weight to 98% by weight.

4 . The secondary battery according to claim 1 , wherein the electrolyte includes at least one anion selected from the group consisting of NO 3 − , Cl − , LiSO 4 − , SO 4 2− , and OH − .

5 . The secondary battery according to claim 1 , wherein the titanium-including oxide includes at least one compound selected from the group consisting of an oxide of titanium and a lithium-titanium oxide having a spinel-type structure.

6 . The secondary battery according to claim 1 , wherein the positive electrode includes a positive electrode active material including at least one compound selected from the group consisting of Li x FePO 4 wherein 0≦x≦1, Li x MnO 2 wherein 0<x≦1, and Li x CoO 2 wherein 0<x≦1.

7 . The secondary battery according to claim 1 , wherein the positive electrode includes a positive electrode current collector having a carbon-including coating layer on at least a part of a surface thereof.

8 . The secondary battery according to claim 1 , wherein the negative electrode current collector includes an electrically conductive foil including at least one metal selected from the group consisting of aluminum, copper, zinc, nickel, titanium, and stainless steel.

9 . The secondary battery according to claim 1 , wherein the negative electrode current collector includes an electrically conductive foil including at least one metal selected from the group consisting of aluminum, copper, zinc, nickel, titanium, and stainless steel, the electrically conductive foil having a carbon-including coating layer on at least a part of a surface thereof.

10 . A battery pack comprising a secondary battery according to claim 1 .

11 . The battery pack according to claim 10 , wherein the battery pack further comprises an external power distribution terminal and a protective circuit.

12 . The battery pack according to claim 10 comprising a plural of the secondary batteries, the secondary batteries being electrically connected to each other in series, in parallel, or in combination of in series and in parallel.

13 . A vehicle comprising the battery pack according to claim 10 .

14 . The vehicle according to claim 13 , wherein the battery pack is configured to recover a regenerative energy of a power of the vehicle.

Assignees

• Toshiba Kk

Inventors

• Yamashita Yasunobu
• Ise Kazuki
• Matsuno Shinsuke
• Takami Norio
• Inagaki Hiroki

Classifications

• H01M4/366

  as layered products · CPC title

• H01M4/661

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

• H01M4/505

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

• H01M4/628

  Inhibitors, e.g. gassing inhibitors, corrosion inhibitors · CPC title

• H01M10/36 Primary

  Accumulators not provided for in groups H01M10/05-H01M10/34 · CPC title