ENERGY STORAGE DEVICE

• US 20170309886A1
• Filed: 04/24/2017
• Published: 10/26/2017
• Est. Priority Date: 04/25/2016
• Status: Active Grant

• Current Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation)
• Original Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation)
• Inventors: MAEDA, Kazuto, KAMBAYASHI, Hirokazu
• Granted Patent: US 10,644,293 B2
• Time in Patent Office: Days
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• 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 50/176 for prismatic or rectangular cells H01M50/181 takes precedence
• CPC Class Codes: H01M 50/528 Fixed electrical connections, i.e. not intended for disconnection
• 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: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

An energy storage device comprising: electrode terminals; an electrode assembly formed by stacking a positive electrode plate and a negative electrode plate; and current collectors which connect the electrode terminals and the electrode assembly to each other, wherein at least one of the positive electrode plate and the negative electrode plate has a plurality of tab groups which are joined to the current collector, each tab group being formed by stacking one or more tabs projecting toward the electrode terminal, and at least one tab group among the tab groups and the current collector has a swaged joint portion, the swaged joint portion projecting from either one of the tab group or the current collector to the other of the tab group or the current collector.

Claims

1. An energy storage device comprising:

electrode terminals;

an electrode assembly formed by stacking a positive electrode plate and a negative electrode plate; and

current collectors which connect the electrode terminals and the electrode assembly to each other,

wherein at least one of the positive electrode plate and the negative electrode plate has a plurality of tab groups which are joined to the current collector, each tab group being formed by stacking one or more tabs projecting toward the electrode terminal, and

at least one tab group among the tab groups and the current collector has a swaged joint portion, the swaged joint portion projecting from either one of the tab group or the current collector to the other of the tab group or the current collector.

2. The energy storage device according to claim 1,

wherein the tab groups are disposed at different positions when viewed in a stacking direction of the tabs.

3. The energy storage device according to claim 1,

wherein the current collector has a plurality of plate portions joined to the tab groups, and among the tab groups and the plate portions, the tab group and the plate portion which correspond to each other have the swaged joint portion, the swaged joint portion projecting from either one of the tab group or the plate portion to the other of the tab group or the plate portion.

4. The energy storage device according to claim 1,

wherein the current collector has plate portions disposed between two tab groups among the tab groups, and the plate portions and the two tab groups have the swaged joint portion, respectively, the swaged joint portion projecting from either one of the plate portion or the tab group to the other of the plate portion or the tab group.

5. The energy storage device according to claim 4,

wherein two swaged joint portions, which the current collector and two tab groups have, project in directions opposite to each other.