Lithium ion secondary battery

Patent metadata

Field	Value
Publication number	US-2019157713-A1
Application number	US-201716304450-A
Country	US
Kind code	A1
Filing date	Dec 21, 2017
Priority date	Jan 26, 2017
Publication date	May 23, 2019
Grant date	—

Abstract

A lithium ion secondary battery including a plurality of electrode laminates, each electrode laminate including a positive electrode, a separator, and a negative electrode being alternatively laminated, each positive electrode and negative electrode having respective positive and negative electrode tabs protruding from a respective line segment, the positive electrode tabs of adjacent electrode laminates face each other and are connected to each other to provide a positive electrode tab bundle and the negative electrode tabs of the adjacent electrode laminates face each other and are connected to each other to provide a negative electrode tab bundle.

First claim

1 . A lithium ion secondary battery comprising:
first and second electrode laminates, wherein each of the first and second electrode laminates has a structure including a positive electrode, a separator, and a negative electrode, each positive electrode, separator, and negative electrode including a plurality of line segments on a circumferential portion thereof, the positive electrode, the separator, and the negative electrode of each of the first and second electrode laminates are alternatively laminated, wherein each of the first and second electrode laminates includes positive electrode tabs protruding from the respective positive electrode and negative electrode tabs protruding from the respective negative electrode, each positive electrode tab and negative electrode tab has a shape protruding from the respective line segment, wherein the positive electrode, the separator, and the negative electrode of the first and second electrode laminates are laminated so that the respective line segments face each other, wherein the positive electrode tabs of the first and second electrode laminates are laminated to face each other to provide a positive electrode tab bundle, wherein the negative electrode tabs of the first and second electrode laminates are laminated to face each other to provide a negative electrode tab bundle, wherein the second electrode laminate is connected to a side portion of the first electrode laminate, and wherein the first electrode laminate is connected in series or parallel to the second electrode laminate.

2 . The lithium ion secondary battery of claim 1 , wherein side planes of the first and second electrode laminates are disposed to face each other.

3 . The lithium ion secondary battery of claim 1 , wherein each of the first and second electrode laminates has a polygonal pillar shape, and
wherein each respective positive electrode, separator, and negative electrode has a polygonal shape.

4 . The lithium ion secondary battery of claim 1 , wherein each of the first and second electrode laminates has a hexagonal pillar shape, and
wherein each respective positive electrode, separator, and negative electrode has a hexagonal shape.

5 . The lithium ion secondary battery of claim 1 , wherein each of the first and second electrode laminates has a regular polygonal pillar shape, and
wherein each respective positive electrode, separator, and negative electrode has a regular polygonal shape with one internal angle having an aliquot part of 360 degrees.

6 . The lithium ion secondary battery of claim 1 , wherein each of the first and second electrode laminates has a regular hexagonal pillar shape, and
wherein each respective positive electrode, separator, and negative electrode has a regular hexagonal shape.

7 . The lithium ion secondary battery of claim 1 , wherein one of the positive electrode tabs of the first electrode laminate is electrically connected to one of the positive electrode tabs of the second electrode laminate, and
wherein one of the negative electrode tabs of the first electrode laminate is electrically connected to one of the negative electrode tabs of the second electrode laminate.

8 . The lithium ion secondary battery of claim 1 , wherein one of the positive electrode tabs of the first electrode laminate is electrically connected to one of the negative electrode tabs of the second electrode laminate, and
the negative electrode tabs of the first electrode laminate is not electrically connected to the positive electrode tabs of the second electrode laminate.

9 . The lithium ion secondary battery of claim 1 , further comprising:
a third electrode laminate having a structure including a positive electrode, a separator, and a negative electrode, wherein each of the positive electrode, the separator and the negative electrode of the third electrode laminate comprises line segments on circumferential portions thereof, and wherein the positive electrode, the separator, and the negative electrode of the third electrode laminate are alternately laminated, wherein the third electrode laminate includes a positive electrode tab and a negative electrode tab, the positive electrode tab and the negative electrode tab of the third electrode laminate having a shape protruding from the respective line segments of the positive electrode and the negative electrode of the third electrode laminate, wherein the positive electrode, the separator, the negative electrode of the third electrode laminate are laminated so that the respective line segments face each other, wherein the positive electrode tabs of the third electrode laminate are laminated to face the positive electrode tabs of the second electrode laminate to provide a positive electrode tab bundle, wherein the negative electrode tabs of the third electrode laminate are laminated to face the negative electrode tabs of the second electrode laminate to provide a negative electrode tab bundle, and wherein the second electrode laminate and the third electrode laminate are connected in series or parallel to each other.

10 . The lithium ion secondary battery of claim 9 , wherein the third electrode laminate has a hexagonal pillar shape, and
wherein each of the positive electrode, the separator, and the negative electrode of the third electrode laminate has a hexagonal shape.

11 . The lithium ion secondary battery of claim 9 , wherein the third electrode laminate has a regular polygonal pillar shape, and
wherein each of the positive electrode, the separator, and the negative electrode of the third electrode laminate has a regular polygonal shape with one internal angle having an aliquot part of 360 degrees.

12 . The lithium ion secondary battery of claim 9 , wherein the third electrode laminate has a regular hexagonal pillar shape, and
wherein each of the positive electrode, the separator, and the negative electrode of the third electrode laminate has a regular hexagonal shape.

13 . The lithium ion secondary battery of claim 9 , wherein one of the positive electrode tabs of the first electrode laminate is electrically connected to one of the positive electrode tabs of the second electrode laminate,
wherein one of the negative electrode tabs of the first electrode laminate is electrically connected to one of the negative electrode tabs of the second electrode laminate, wherein one of the positive electrode tabs of the second electrode laminate is electrically connected to one of the positive electrode tabs of the third electrode laminate, and wherein one of the negative electrode tabs of the second electrode laminate is electrically connected to one of the negative electrode tabs of the third electrode laminate.

14 . The lithium ion secondary battery of claim 9 , wherein one of the positive electrode tabs of the first electrode laminate is electrically connected to one of the negative electrode tabs of the second electrode laminate,
wherein the negative electrode tabs of the first electrode laminate are not electrically not connected to the positive electrode tabs of the second electrode laminate, wherein one of the positive electrode tabs of the second electrode laminate is electrically connected to one of the negative electrode tabs of the third electrode laminate, and wherein the negative electrode tabs of the second electrode laminate are not electrically not connected to the positive electrode tabs of the third electrode laminate.

15 . A lithium ion secondary battery comprising:
first, second, and third electrode laminates, each of the first, second and third electrode laminates has a structure includ

Assignees

• Lg Chemical Ltd

Inventors

• Lee Myung Ki
• Song Jooyong
• Jeong Hee Seok
• Ahn Ji Hee

Classifications

• H01M4/366

  as layered products · CPC title

• H01M10/0585 Primary

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

• H01M2004/027

  Negative electrodes · CPC title

• H01M10/0525 Primary

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

• H01M2004/028

  Positive electrodes · CPC title