Nonaqueous electrolyte battery, battery pack, and vehicle

Patent metadata

Field	Value
Publication number	US-2024097274-A1
Application number	US-202318176224-A
Country	US
Kind code	A1
Filing date	Feb 28, 2023
Priority date	Sep 16, 2022
Publication date	Mar 21, 2024
Grant date	—

Abstract

In general, according to one embodiment, a nonaqueous electrolyte battery is provided. The nonaqueous electrolyte battery includes an electrode group, including a positive electrode, a negative electrode, and a separator. The separator includes at least one metal-element containing portion containing a metal element. The at least one metal-element containing portion is provided on a surface of the separator in contact with the negative electrode. The at least one metal-element containing portion contains at least one selected from a group consisting of a metal, a metallic oxide, and a metallic fluoride. An area of the at least one metal-element containing portion is in a range of 0.3 mm 2 to 3.2 mm 2 .

First claim

What is claimed is:

1 . A nonaqueous electrolyte battery comprising an electrode group that includes a positive electrode, a negative electrode, and a separator, wherein
the separator includes at least one metal-element containing portion containing a metal element, the at least one metal-element containing portion being provided on a surface of the separator in contact with the negative electrode, the at least one metal-element containing portion containing at least one selected from a group consisting of a metal, a metallic oxide, and a metallic fluoride, and an area of the at least one metal-element containing portion is 0.3 mm 2 or larger and 3.2 mm 2 or smaller.

2 . The nonaqueous electrolyte battery according to claim 1 , wherein
the separator includes a region between the positive electrode and the negative electrode, within the region, an outermost layer positioned outermost in the electrode group includes a plurality of the at least one metal-element containing portion, and a number of metal-element containing portions per unit area in the outermost layer is 200 per square meter or more and 1290 per square meter or less.

3 . The nonaqueous electrolyte battery according to claim 1 , wherein
the separator includes a region between the positive electrode and the negative electrode, within the region, a number of the at least one metal-element containing portion per unit area in an outermost layer positioned outermost in the electrode group is larger than a number of the at least one metal-element containing portion per unit area in an inner layer positioned inside with respect to the outermost layer.

4 . The nonaqueous electrolyte battery according to claim 1 , wherein
the negative electrode includes a negative electrode active material, and the negative electrode active material includes at least one selected from a group consisting of titanium oxide and niobium-titanium oxide.

5 . The nonaqueous electrolyte battery according to claim 1 , wherein
the metal-element containing portion includes at least one selected from a group consisting of the metal containing the metal element, the metallic oxide containing the metal element, and the metallic fluoride containing the metal element, and the metal element is at least one selected from a group consisting of Co, Fe, Cu, Ni, and Mn.

6 . A battery pack including the nonaqueous electrolyte battery according to claim 1 .

7 . The battery pack according to claim 6 , further comprising:
an external power distribution terminal, and a protective circuit.

8 . The battery pack according to claim 6 , which includes a plurality of the nonaqueous electrolyte battery, and
the nonaqueous electrolyte batteries are electrically connected to each other in series, in parallel, or in a combination of in-series connection and parallel connection.

9 . A vehicle comprising the battery pack according to claim 6 .

10 . The vehicle according to claim 9 , comprising a mechanism configured to convert kinetic energy of the vehicle into regenerative energy.

Assignees

• Toshiba Kk

Inventors

• Yamashita Yasunobu
• Ueda Kakuya
• Oki Mitsuhiro
• Harada Yasuhiro
• Takami Norio

Classifications

• H01M50/431 Primary

  Inorganic material · CPC title

• H01M4/483 Primary

  for non-aqueous cells (H01M4/485 takes precedence) · CPC title

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M2220/20

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