ELECTRODE AND METHOD OF MANUFACTURING THE SAME

• US 20130048340A1
• Filed: 08/02/2012
• Published: 02/28/2013
• Est. Priority Date: 08/30/2011
• Status: Active Grant

• Current Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation)
• Original Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation)
• Inventors: BANDO, Toshinori, OHTANI, Yoshikatsu, OKABE, Kazuya
• Granted Patent: US 9,905,838 B2
• Time in Patent Office: Days
• US Class Current: 174/126.2
• CPC Class Codes: H01G 11/22 Electrodes
• CPC Class Codes: H01G 11/84 Processes for the manufacture of hybrid or EDL capacitors, or components thereof
• CPC Class Codes: H01M 4/0404 by coating on electrode collectors
• CPC Class Codes: H01M 4/133 Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/1393 of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/587 for inserting or intercalating light metals
• CPC Class Codes: H01M 4/623 fluorinated polymers
• CPC Class Codes: H01M 4/667 in the form of layers, e.g. coatings
• CPC Class Codes: H01M 50/533 characterised by the shape of the leads or tabs
• CPC Class Codes: H01M 50/534 characterised by the material of the leads or tabs
• CPC Class Codes: H01M 50/536 characterised by the method of fixing the leads to the electrodes, e.g. by welding
• CPC Class Codes: H01M 50/538 Connection of several leads or tabs of wound or folded electrode stacks
• CPC Class Codes: H01M 50/55 on the same side of the cell
• CPC Class Codes: H01M 50/553 Terminals adapted for prismatic, pouch or rectangular cells
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors

Abstract

An electrode includes: an electrode plate; a conductive layer formed on the electrode plate; and an active material layer formed continuously on the electrode plate and on the conductive layer, and the electrode plate includes an uncoated region where a surface of the electrode plate is exposed.

Claims

1. An electrode comprising:

an electrode plate;

a conductive layer formed on the electrode plate; and

an active material layer formed continuously on the electrode plate and on the conductive layer,

wherein the electrode plate includes an uncoated region where a surface of the electrode plate is exposed.

2. The electrode according to claim 1,

wherein the active material layer includes an active material layer spreading part, and

wherein an edge of the active material layer on the uncoated region side is located closer to the uncoated region side than an edge of the conductive layer in the active material layer spreading part.

3. The electrode according to claim 2,

wherein a distance between the edge of the active material layer in the active material layer spreading part and the edge of the conductive layer is 2 mm or less.

4. The electrode according to claim 2,

wherein the electrode plate includes a short-circuiting prevention layer with higher electrical resistance than the electrode plate, and

wherein the short-circuiting prevention layer is formed on a boundary portion between the active material layer and the uncoated region.

5. The electrode according to claim 1,

wherein a region where the active material layer is formed and the uncoated region of the electrode plate are extended.

6. A method of manufacturing an electrode,

wherein the electrode includes an electrode plate, a conductive layer formed on the electrode plate, and an active material layer formed continuously on the electrode plate and on the conductive layer,

wherein the electrode plate includes an uncoated region where a surface of the electrode plate is exposed,

wherein the active material layer includes an active material layer spreading part, and

wherein an edge of the active material layer on the uncoated region side is located closer to the uncoated region side than an edge of the conductive layer in the active material layer spreading part,

the method comprising a step of specifying, with an optical position detection unit, a position in the active material layer spreading part at which the active material layer is located.

7. The method of manufacturing the electrode according to claim 6,

wherein a distance between the edge of the active material layer in the active material layer spreading part and the edge of the conductive layer is 2 mm or less.

8. The method of manufacturing the electrode according to claim 6,

wherein the step of specifying the position at which the active material layer is located is a step of detecting positional information on the edge of the active material layer with the optical position detection unit.

9. The method of manufacturing the electrode according to claim 8, further comprising:

a step of forming a short-circuiting prevention layer with higher electrical resistance than the electrode plate on a boundary portion between the uncoated region and the active material layer on the electrode plate based on the positional information on the edge of the active material layer.

10. The method of manufacturing the electrode according to claim 8, further comprising:

a step of setting a cutting position of the electrode plate on which the conductive layer and the active material layer are formed, based on the positional information on the edge of the active material layer.

11. The method of manufacturing the electrode according to claim 6,

wherein the electrode plate is in a rectangular band form,

wherein each of the conductive layer and the active material layer is in a band form extending in a longitudinal direction of the electrode plate so that the uncoated region is located at an end of the electrode plate in the width direction, and

wherein the active material layer spreading part is formed along an entire length of a boundary portion between the active material layer and the uncoated region.

12. A method of manufacturing an electrode.

wherein the electrode includes an electrode plate, a conductive layer formed on the electrode plate, and an active material layer formed continuously on the electrode plate and on the conductive layer,

wherein the electrode plate includes an uncoated region where a surface of the electrode plate is exposed,

wherein the active material layer includes an active material layer spreading part, and

wherein an edge of the active material layer on the uncoated region side is located closer to the uncoated region side than an edge of the conductive layer in the active material layer spreading part,

the method comprising:

a step of pressing the uncoated region by applying a pressure force on the uncoated region and;

a step of pressing the active material layer by applying a pressure force on a region where the active material layer is formed.

13. The method of manufacturing the electrode according to claim 12,

wherein a distance between the edge of the active material layer in the active material layer spreading part and the edge of the conductive layer is 2 mm or less.

14. The method of manufacturing the electrode according to claim 12,

wherein the electrode plate is in a rectangular band form,

wherein each of the conductive layer and the active material layer is in a band form extending in a longitudinal direction of the electrode plate so that the uncoated region is located at an end of the electrode plate in the width direction, and

wherein the active material layer spreading part is formed along an entire length of a boundary portion between the active material layer and the uncoated region.