Complex electrode assembly including plurality of electrode assemblies and electrochemical device comprising the complex electrode assembly

Patent metadata

Field	Value
Publication number	US-10468656-B2
Application number	US-201514876003-A
Country	US
Kind code	B2
Filing date	Oct 6, 2015
Priority date	Oct 6, 2014
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

A complex electrode assembly includes a first sheet-type wiring which extends in a lengthwise direction of the first sheet-type wiring and comprises a sheet region of which a width that is perpendicular to the lengthwise direction is greater than a thickness that is perpendicular to the lengthwise direction and a width direction of the first sheet-type wiring, and electrode assemblies which are arranged separate from each other in the lengthwise direction of the first sheet-type wiring and are electrically connected to the first sheet-type wiring. The first sheet-type wiring may be disposed to face an outer surface of each of the electrode assemblies.

First claim

What is claimed is:

1. A complex electrode assembly comprising:
a first sheet-shaped wire which extends in a lengthwise direction thereof and comprises a sheet region, a width of which in a direction perpendicular to the lengthwise direction is greater than a thickness thereof in a direction perpendicular to the lengthwise direction and a width direction of the first sheet-shaped wire;
a plurality of electrode assemblies which are arranged to be spaced apart from each other in the lengthwise direction of the first sheet-shaped wire and are electrically connected to the first sheet-shaped wire, wherein each of the electrode assemblies comprises a first electrode tab electrically connected to the first sheet-shaped wire, wherein the first electrode tab is a positive electrode tab; and
an outer casing which packages the first sheet-shaped wire and the plurality of electrode assemblies,
wherein outer surfaces of each of the electrode assemblies comprises a first outer surface and a second outer surface arranged opposite to each other in the lengthwise direction of the first sheet-shaped wire, a third outer surface and a fourth outer surface arranged opposite to each other in the width direction of the first sheet-shaped wire, and a fifth outer surface and a sixth outer surface arranged opposite to each other in a thickness direction of the first sheet-shaped wire,
the first sheet-shaped wire is disposed to face the fifth or sixth outer surface of at least one of the electrode assemblies,
the fifth and sixth outer surfaces of the each of the electrode assemblies are the outermost surfaces thereof in the thickness direction of the first sheet-shaped wire,
the first electrode tab is partially bent in a way such that a portion of the first electrode tab is bonded with the first sheet-shaped wire,
each of the electrode assemblies comprises a first side and a second side in the width direction of the first sheet-shaped wire, and
the first sheet-shaped wire is disposed between the first side and the second side of each of the electrode assemblies.

2. The complex electrode assembly of claim 1 , wherein each of the electrode assemblies further comprises a first electrode plate, a second electrode plate, and a separator interposed between the first electrode plate and the second electrode plate.

3. The complex electrode assembly of claim 2 , wherein
the first electrode plate comprises a first current collector and a first active material layer coated on the first current collector, and
a strength of the first sheet-shaped wire is greater than a strength of the first current collector.

4. The complex electrode assembly of claim 2 , wherein
each of the electrode assemblies comprises at least one of:
a jelly-roll-type wound electrode assembly in which the first electrode plate, the second electrode plate, and the separator are wound together;
a stacked electrode assembly in which the first electrode plate, the second electrode plate, and the separator are repeatedly stacked one on another; and
a folded electrode assembly in which respective portions of the first electrode plate, the second electrode plate and the separator are folded.

5. The complex electrode assembly of claim 2 , wherein
the fifth outer surface and the sixth outer surface are parallel to each other, and
the first electrode plate, the second electrode plate and the separator, which are arranged between the fifth outer surface and the sixth outer surface, are substantially parallel to one another.

6. The complex electrode assembly of claim 2 , wherein the first electrode tab electrically connects the first electrode plate to the first sheet-shaped wire.

7. The complex electrode assembly of claim 6 , further comprising:
an insulation layer disposed on at least a portion of an outer surface of the first sheet-shaped wire, except for the portion of the first sheet-shaped wire bonded with the first electrode tab.

8. The complex electrode assembly of claim 6 , wherein the portion of the first sheet-shaped wire bonded with the first electrode tab faces at least one of first to sixth outer surfaces of each of the electrode assemblies.

9. The complex electrode assembly of claim 8 , wherein
the first electrode tab extends in the width direction of the first sheet-shaped wire, and
an end of the first electrode tab is bent in a direction opposite to an extending direction of the first electrode tab, to face the fifth or sixth outer surface of the electrode assembly.

10. The complex electrode assembly of claim 8 , wherein
the first electrode tab extends in the width direction of the first sheet-shaped wire, and
the first sheet-shaped wire comprises a protrusion which protrudes in the width direction and is bonded with the first electrode tab.

11. The complex electrode assembly of claim 10 , wherein
the protrusion of the first sheet-shaped wire is bent in the thickness direction of the first sheet-shaped wire to face the third or fourth outer surface of each of the electrode assemblies, and
a bent portion of the protrusion is bonded with the first electrode tab.

12. The complex electrode assembly of claim 10 , wherein the end of the first electrode tab is bent in the thickness direction of the first sheet-shaped wire to be bonded with the protrusion of the first sheet-shaped wire.

13. The complex electrode assembly of claim 8 , wherein the first electrode tab extends in the lengthwise direction of the first sheet-shaped wire.

14. The complex electrode assembly of claim 13 , wherein
the first electrode tab is bonded with the first sheet-shaped wire at a location between each of the electrode assemblies and the first sheet type wiring, and
the first electrode tab comprises:
a first portion which faces the first or second outer surface of each of the electrode assemblies; and
a second portion which faces the fifth or sixth outer surface of each of the electrode assemblies,
wherein the second portion of the first electrode tab is bonded with the first sheet-shaped wire.

15. The complex electrode assembly of claim 13 , wherein the electrode assemblies comprise:
a first electrode assembly and a second electrode assembly, and
a first electrode tab of the first electrode assembly is disposed between the first electrode assembly and the first sheet-shaped wire and is bonded with the first sheet-shaped wire at a location between the second electrode assembly and the first sheet-shaped wire.

16. The complex electrode assembly of claim 13 , wherein
the first sheet-shaped wire is bent to face both the fifth outer surface and the sixth outer surface of each of the electrode assemblies, and
the first electrode tab is bonded with a portion of the first sheet-shaped wire which faces the fifth outer surface of each of the electrode assemblies.

17. The complex electrode assembly of claim 13 , wherein
the first sheet-shaped wire is bent to face both the fifth outer surface and the sixth outer surface of each of the electrode assemblies, and
the first electrode tab is bonded with a portion of the first sheet-shaped wire which faces the sixth outer surface of each of the electrode assemblies.

18. The complex electrode assembly of claim 13 , wherein
a portion of the first sheet-shaped wire located between two adjacent electrode assemblies among the electrode assemblies is bent to face the first or second outer surface of each of the two adjacent electrode assemblies, and
the first electrode tab is bonded with a portion of the first sheet-shaped wire which faces the first or second outer

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kwon Moonseok
• Choi Jaeman
• Kwon Kuntae
• Do Euncheol
• Lee Yeonil

Classifications

• H01M6/46 Primary

  of flat cells · CPC title

• H01M10/0587

  of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators · CPC title

• H01M10/0436 Primary

  Small-sized flat cells or batteries for portable equipment · CPC title

• H01M10/0431

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title