Method of manufacturing battery electrode and electrode manufacturing apparatus

Patent metadata

Field	Value
Publication number	US-10930919-B2
Application number	US-201716087379-A
Country	US
Kind code	B2
Filing date	Mar 21, 2017
Priority date	Mar 30, 2016
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

A method of manufacturing an electrode, comprising the steps of: forming a first layer by intermittently applying a layer to a current collecting foil with thickness of 40 μm or more and 300 μm or less; and forming a second layer, wherein the second layer is formed both on a region where the first layer has been formed on the current collecting foil and an exposed region where the current collecting foil is exposed without being formed the first layer; wherein in the step of forming of second layer, providing a gap of 40 μm or more between a applying part of application apparatus and the current collecting foil, based on a positional information of the first layer, from during applying a layer to the exposed region to during applying a layer to the first layer.

First claim

The invention claimed is:

1. A method of manufacturing an electrode, comprising the steps of:
forming a first layer by intermittently applying the first layer to a current collecting foil, wherein the first layer has a thickness of 40 μm or more and 300 μm or less; and
forming a second layer, wherein the second layer is formed both on a region where the first layer has been formed on the current collecting foil and on an exposed region where the current collecting foil is exposed without the first layer being formed on the current collecting foil, and wherein a thickness of the second layer is 1 μm or more and 30 μm or less, and, a length of the second layer on the region where the first layer has been formed is 1 mm or more and a length of the second layer on the exposed region is 1 mm or more;
wherein in the step of forming of the second layer, providing a gap of 40 μm or more between an applying part of an application apparatus and the current collecting foil, wherein the gap is provided based on a position of the first layer and during a time when the second layer is formed on the exposed region to a time when the second layer is formed on the first layer.

2. The method of manufacturing the electrode according to claim 1 , wherein the position of the first layer is determined using a detector for detecting the first layer.

3. The method of manufacturing the electrode according to claim 1 , wherein the position of the first layer is determined based on a control instruction for controlling the intermittent application of the first layer to the current collecting foil.

4. The method of manufacturing the electrode according to claim 1 , wherein forming the second layer is implemented before the first layer dries after applying the first layer.

5. The method of manufacturing the electrode according to claim 1 ,
wherein the step of forming the first layer comprises changing a gap distance between the applying part of the application apparatus and the current collecting foil to form the first layer with a first thickness for an area on which the second layer is not formed, wherein the first thickness has a different thickness than a second thickness of the first layer formed for an area on which the second layer is formed.

6. The method of manufacturing the electrode according to claim 1 , wherein the second layer contains at least insulating particles.

7. The method of manufacturing the electrode according to claim 1 , wherein the second layer is formed on substantially an entire exposed surface of the first layer.

8. The method of manufacturing the electrode according to claim 1 , wherein the application apparatus is a die coater.

Assignees

• Nec Corp

Inventors

• Otohata Makihiro

Classifications

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M4/139

  Processes of manufacture · CPC title

• H01M4/661

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

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/70

  characterised by shape or form · CPC title