Lithium ion secondary battery

Patent metadata

Field	Value
Publication number	US-10991973-B2
Application number	US-201716304450-A
Country	US
Kind code	B2
Filing date	Dec 21, 2017
Priority date	Jan 26, 2017
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

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

The invention claimed is:

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,
wherein the first electrode laminate is connected in series or parallel to the second electrode laminate,
wherein each of the first and second electrode laminates has an equilateral triangular pillar shape or a regular hexagonal pillar shape,
wherein the lithium ion secondary battery further comprises an insulator located between the negative electrode tabs of the first electrode laminate and the positive electrode tabs of the second electrode laminate such that the negative electrode tabs of the first electrode laminate are not electrically connected to the positive electrode tabs of the second electrode laminate, and
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.

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 respective positive electrode, separator, and negative electrode has a regular hexagonal shape.

4. 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.

5. The lithium ion secondary battery of claim 4 , 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.

6. The lithium ion secondary battery of claim 4 , 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.

7. The lithium ion secondary battery of claim 4 , 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.

8. The lithium ion secondary battery of claim 4 ,
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.

9. The lithium ion secondary battery of claim 4 ,
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 connected to the positive electrode tabs of the third electrode laminate.

10. A lithium ion secondary battery comprising:
first, second, and third electrode laminates, each of the first, second and third electrode laminates has a structure including a positive electrode, a separator, and a negative electrode, wherein the positive electrode, separator, and negative electrode of each of the first, second, and third electrode laminates are alternately laminated,
wherein each of the first and second electrode laminates has a regular hexagonal pillar shape or an equilateral triangular pillar shape,
wherein the second electrode laminate includes a first side plane and a second side plane, disposed on side portions of the second electrode laminate and are adjacent to each other,
wherein the first side plane of the second electrode laminate faces and overlaps one side plane of the first electrode laminate,
wherein the second side plane of the second electrode laminate faces and overlaps one side plane of the third electrode laminate,
wherein the second electrode laminate is connected in series or parallel to the first and third electrode laminates,
wherein the lithium ion secondary battery further comprises an insulator located between the negative electrode tabs of the first electrode laminate and the positive electrode tabs of the second electrode laminate such that the negative electrode tabs of the first electrode laminate are not electrically connected to the positive electrode tabs of the second electrode laminate, and
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.

11. The lithium ion secondary battery of claim 10 , wherein another side plane of the first electrode laminate and another side plane of the third electrode laminate face and overlap each other.

Assignees

• Lg Chemical Ltd

Inventors

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

Classifications

• H01M50/54

  Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges · CPC title

• H01M50/533

  characterised by the shape of the leads or tabs · CPC title

• H01M50/463

  Separators, membranes or diaphragms characterised by their shape · CPC title

• H01M50/572

  Means for preventing undesired use or discharge · 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