Electrode assembly including electrode plates with coupled additional taps formed thereon

Patent metadata

Field	Value
Publication number	US-10658648-B2
Application number	US-201715765360-A
Country	US
Kind code	B2
Filing date	Jun 2, 2017
Priority date	Jul 12, 2016
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

Disclosed is an electrode assembly with a structure in which a plurality of electrode plates are stacked while a separator is interposed between a positive electrode plate and a negative electrode plate, each of the electrode plates including an electrode tap that externally protrude from one side thereof to form a tap-lead coupler and at least two or more fixing parts that externally protrude from each of electrode plate by a length of 10% to 50% of a length of the electrode tap from the one side and/or the other side, wherein fixing parts with the same polarity, which are positioned in parallel to each other in up and down directions, are bonded to each other to maintain a stack interval between the electrode plates while the electrode plates are stacked.

First claim

The invention claimed is:

1. An electrode assembly comprising:
a plurality of electrode plates stacked while a separator is interposed between a positive electrode plate and a negative electrode plate of the plurality of electrode plates,
wherein each of the electrode plates includes an electrode tap that externally protrudes from one side thereof to form a tap-lead coupler and at least two or more fixing parts that externally protrude by a length of 10% to 50% of a length of the electrode tap from the one side and/or the another side thereof,
wherein fixing parts of the at least two or more fixing parts with the same polarity, which are positioned in parallel to each other in up and down directions, are bonded to each other to maintain a stack interval between the electrode plates while the electrode plates are stacked,
wherein each of the fixing parts includes an opening perforated therein, and
wherein an insulation tape continuously passes through the opening of each of the fixing parts and surrounds the fixing parts.

2. The electrode assembly of claim 1 , wherein the fixing parts externally protrude toward a side of the respective electrode plate that faces the electrode tap.

3. The electrode assembly of claim 2 , wherein the electrode assembly is configured with a stack-folding type structure in which a plurality of unit cells including at least one positive electrode plate and at least negative electrode plate are wounded by a separation film.

4. The electrode assembly of claim 1 , wherein the fixing parts include a first fixing part positioned adjacently to an electrode tap and a second fixing part positioned on another side different than the one side on which the first fixing part is formed.

5. The electrode assembly of claim 4 , wherein:
the first fixing part is formed on a first side on which an electrode tap is positioned; and
the second fixing part is formed on a second side that faces the first fixing part or is formed on any one of sides that are perpendicularly adjacent to the second side.

6. The electrode assembly of claim 5 , wherein:
the first fixing part is positioned on one side of the first side to be inclined based on a central line of a width of the electrode plate; and
the second fixing part is formed on a second side to be symmetrical to the first fixing part based on a center of the electrode plate.

7. The electrode assembly of claim 4 , wherein:
the first fixing part is formed on one side as any one of sides that are perpendicularly adjacent to one side on which the electrode tap is positioned; and
the second fixing part is formed on another side that faces the first fixing part.

8. The electrode assembly of claim 7 , wherein:
the first fixing part is positioned on one side of the first side to be inclined to a side based on a central line of a length of the electrode plate; and
the second fixing part is formed on another side to be symmetrical to the first fixing part based on a center of the electrode plate.

9. The electrode assembly of claim 4 , wherein:
the first fixing part is formed at an intersection between one side on which the electrode tap is positioned and a side that is perpendicularly adjacent to the one side; and
the second fixing part is formed at an intersection between two sides facing the first fixing part.

10. The electrode assembly of claim 4 , wherein the electrode assembly is configured with a stack type in which a plurality of electrode plates are sequentially stacked.

11. The electrode assembly of claim 1 , wherein the fixing parts with the same polarity are bonded to each other via welding or soldering.

12. The electrode assembly of claim 1 , wherein the fixing parts each have a polygonal structure, an irregular structure with at least one rounded external circumferential side, or a semicircular or half-elliptic curved line structure, on a plane.

13. The electrode assembly of claim 1 , wherein the fixing parts are each formed with a wedge structure in which at least a portion thereof is concave on a plane.

14. The electrode assembly of claim 13 , wherein an insulation tape is added to the fixing parts while integrally surrounding wedges while the fixing parts are collected.

15. A battery cell comprising the electrode assembly of claim 1 .

16. A device comprising one or more of the battery cell of claim 15 .

Assignees

• Lg Chemical Ltd

Inventors

• Lee Jung Pil
• Kim Eun Bee
• Kim Ji Young
• Jung Hyeri

Classifications

• H01M10/044

  with bipolar electrodes · CPC title

• H01M10/0585

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

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M10/0525

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

• H01M2/266

  Electricity · mapped topic