Non-aqueous electrolyte secondary battery

Patent metadata

Field	Value
Publication number	US-9627711-B2
Application number	US-201314410650-A
Country	US
Kind code	B2
Filing date	Jul 1, 2013
Priority date	Jun 29, 2012
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The positive electrode of this secondary battery contains a positive electrode active substance having a hollow structure, which has a shell portion and a hollow portion formed inside the shell portion. In addition, a heat-resistant barrier layer is disposed between the positive electrode and the separator.

First claim

The invention claimed is:

1. A non-aqueous electrolyte secondary battery comprising:
a positive electrode that contains a positive electrode active substance having a hollow structure, which has a shell portion and a hollow portion formed inside the shell portion;
a negative electrode;
a separator disposed between the positive electrode and the negative electrode; and
a heat-resistant barrier layer disposed between the positive electrode and the separator,
wherein the heat-resistant barrier layer is provided on an entire surface of the separator.

2. The non-aqueous electrolyte secondary battery according to claim 1 , wherein a particle porosity of the positive electrode active substance is 15% or higher.

3. The non-aqueous electrolyte secondary battery according to claim 1 , wherein a thickness of the shell portion of the positive electrode active substance is 2 μm or lower.

4. The non-aqueous electrolyte secondary battery according to claim 1 , wherein a thickness of the heat-resistant barrier layer is 2 μm or higher.

5. The non-aqueous electrolyte secondary battery according to claim 1 , wherein the separator is constituted from a polyolefin-based resin.

6. The non-aqueous electrolyte secondary battery according to claim 1 , wherein the heat-resistant barrier layer contains a filler as a main component, and the filler is at least one type of material selected from among the group consisting of alumina, boehmite, silica, titania, zirconia, calcia and magnesia.

7. A vehicle equipped with the non-aqueous electrolyte secondary battery according to claim 1 .

Assignees

• Nagai Hiroki
• Tamaki Takumi
• Toyota Motor Co Ltd

Inventors

• Nagai Hiroki
• Tamaki Takumi

Classifications

• B60L3/04

  Cutting off the power supply under fault conditions (protective devices and circuit arrangements in general H01H; H02H) · CPC title

• B60L2240/547

  Voltage · CPC title

• B60L50/64

  Constructional details of batteries specially adapted for electric vehicles · CPC title

• H01M4/133

  Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• B60L58/21

  having the same nominal voltage · CPC title