BATTERY

• US 20200136100A1
• Filed: 10/23/2019
• Published: 04/30/2020
• Est. Priority Date: 10/24/2018
• Status: Active Application

• Current Assignee: Envision AESC Energy Devices Ltd.
• Original Assignee: Envision AESC Energy Devices Ltd.
• Inventors: YAMAMOTO, Yoshimasa, YANAGISAWA, Ryota
• Application Number:
  US16/661,496
• Publication Number:
  US 20200136100A1
• Time in Patent Office: Days
• CPC Class Codes: H01M 10/0459 Cells or batteries with folded separator between plate-like electrodes
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0583 of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
• CPC Class Codes: H01M 10/0585 of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
• CPC Class Codes: H01M 10/4235 Safety or regulating additives or arrangements in electrodes, separators or electrolyte H01M10/4242 takes precedence
• CPC Class Codes: H01M 2004/021 Physical characteristics, e.g. porosity, surface area
• CPC Class Codes: H01M 2004/028 Positive electrodes
• CPC Class Codes: H01M 4/485 of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy H01M4/505, H01M4/525 take precedence
• CPC Class Codes: H01M 4/624 Electric conductive fillers
• CPC Class Codes: H01M 50/119 Metals
• CPC Class Codes: H01M 50/121 Organic material
• CPC Class Codes: H01M 50/124 having a layered structure
• CPC Class Codes: H01M 50/133 Thickness
• CPC Class Codes: H01M 50/423 Polyamide resins
• CPC Class Codes: H01M 50/431 Inorganic material
• CPC Class Codes: H01M 50/446 Composite material consisting of a mixture of organic and inorganic materials
• CPC Class Codes: H01M 50/457 comprising three or more layers
• CPC Class Codes: H01M 50/489 Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A separator includes a base material and insulating layers. The insulating layers are on both surfaces (first surface and second surface) of the base material. Each active material layer has a thickness equal to or less than 60 μm. A ratio of the thickness of the insulating layer (a total of the thickness of the insulating layer on the first surface of the base material and the thickness of the insulating layer on the second surface of the base material) to the thickness of the base material is equal to or greater than 1.50 and equal to or less than 3.00.

Claims

1. A battery comprising:

an electrode capable of functioning as a positive electrode or a negative electrode; and

a separator comprising a base material and an insulating layer,

wherein the electrode comprises a current collector comprising a first surface and a second surface opposite to the first surface, and an active material layer positioned over the first surface of the current collector and having a thickness equal to or less than 60 μ

m, and

a ratio of a thickness of the insulating layer to a thickness of the base material is equal to or greater than 1.50 and equal to or less than 3.00.

2. The battery according to claim 1,

wherein the insulating layer comprises magnesium hydroxide.

3. The battery according to claim 1,

wherein the insulating layer further comprises aromatic polyamide.

4. The battery according to claim 1,

wherein the positive electrode comprises an active material layer, and

wherein the active material layer of the positive electrode comprises equal to or greater than 5.0 parts by mass of a conductive aid based on 100 parts by mass of a total mass of the active material layer of the positive electrode.

5. The battery according to claim 1,

wherein the separator is folded in zigzags such that a part of the separator is positioned between the adjacent positive electrode and negative electrode.