Rechargeable battery

Patent metadata

Field	Value
Publication number	US-9543611-B2
Application number	US-201414179394-A
Country	US
Kind code	B2
Filing date	Feb 12, 2014
Priority date	Oct 30, 2013
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A rechargeable battery includes: a case; a first electrode assembly accommodated in the case; and second and third electrode assemblies accommodated in the case at positions adjacent to the case with the first electrode assembly being disposed therebetween. The second and third electrode assemblies have thicknesses different from that of the first electrode assembly.

First claim

What is claimed is:

1. A rechargeable battery comprising:
a case;
a first electrode assembly accommodated in the case; and
second and third electrode assemblies accommodated in the case at positions adjacent to the case with the first electrode assembly being disposed therebetween,
wherein the second and third electrode assemblies have thicknesses different from that of the first electrode assembly and wherein the first, second and third electrode assemblies respectively have positive and negative electrode plates and wherein the positive and negative electrode plates of the second and third electrode assemblies are thicker than the positive and negative electrode plates of the first electrode assembly.

2. The rechargeable battery of claim 1 , wherein the first electrode assembly has energy density higher than energy density of the second electrode assembly and energy density of the third electrode assembly, and wherein the second and third electrode assemblies are thinner than the first electrode assembly.

3. The rechargeable battery of claim 1 , wherein
the first electrode assembly is formed by stacking a first positive electrode plate, a first negative electrode plate, and a first separator therebetween, and winding the first positive electrode plate, the first separator, and the first negative electrode plate,
the second electrode assembly is formed by stacking a second positive electrode plate, a second negative electrode plate, and a second separator therebetween, and winding the second positive electrode plate, the second separator, and the second negative electrode plate,
the third electrode assembly is formed by stacking a third positive electrode plate, a third negative electrode plate, and a third separator therebetween, and winding the third positive electrode plate, the third separator, and the third negative electrode plate, and
at least one of the second and third electrode assemblies is wound with fewer turns than winding turns of the first electrode assembly.

4. The rechargeable battery of claim 1 , wherein
the first electrode assembly comprises a first positive electrode plate formed by coating a positive electrode collector with an active material, a first negative electrode plate formed by coating a negative electrode collector with an active material, and a first separator,
the second electrode assembly comprises a second positive electrode plate formed by coating a positive electrode collector with an active material, a second negative electrode plate formed by coating a negative electrode collector with an active material, and a second separator, and
the third electrode assembly comprises a third positive electrode plate formed by coating a positive electrode collector with an active material, a third negative electrode plate formed by coating a negative electrode collector with an active material, and a third separator.

5. The rechargeable battery of claim 4 , wherein at least one of the positive electrode collector of the second positive electrode plate and the positive electrode collector of the third positive electrode plate is about 1.2 or more times as thick as the positive electrode collector of the first positive electrode plate.

6. The rechargeable battery of claim 4 , wherein at least one of the negative electrode collector of the second negative electrode plate and the negative electrode collector of the third negative electrode plate is about 1.25 or more times as thick as the negative electrode collector of the first negative electrode plate.

7. The rechargeable battery of claim 4 , wherein at least one of the second separator and the third separator is thicker than the first separator.

8. The rechargeable battery of claim 7 , wherein at least one of the second separator and the third separator is about 1.14 or more times as thick as the first separator.

9. The rechargeable battery of claim 4 , wherein
a coating amount per unit area of the active material of the first positive electrode plate is different from a coating amount per unit area of the active material of the second positive electrode plate and a coating amount per unit area of the active material of the third positive electrode plate, or
a coating amount per unit area of the active material of the first negative electrode plate is different from a coating amount per unit area of the active material of the second negative electrode plate and a coating amount per unit area of the active material of the third negative electrode plate.

10. A rechargeable battery comprising:
a case;
a first electrode assembly accommodated in the case, the first electrode assembly comprising a first positive electrode plate formed by coating a first positive electrode collector with an active material, a first negative electrode plate formed by coating a first negative electrode collector with an active material, and a first separator disposed therebetween;
a second electrode assembly accommodated in the case, the second electrode assembly comprising a second positive electrode plate formed by coating a second positive electrode collector with an active material, a second negative electrode plate formed by coating a second negative electrode collector with an active material, and a second separator disposed therebetween; and
a third electrode assembly accommodated in the case, the third electrode assembly comprising a third positive electrode plate formed by coating a third positive electrode collector with an active material, a third negative electrode plate formed by coating a third negative electrode collector with an active material, and a third separator disposed therebetween,
wherein the second and third electrode assemblies are disposed adjacent to the case,
the first electrode assembly is disposed between the first and second electrode assemblies, and
the second and third electrode assemblies have energy density lower than energy density of the first electrode assembly and wherein the positive and negative electrode plates of the second and third electrode assemblies are thicker than the positive and negative electrode plates of the first electrode assembly.

11. The rechargeable battery of claim 10 , wherein a thickness of at least one of the first positive electrode collector, the first negative electrode collector, and the first separator is different from a thickness of at least one of the second positive electrode collector, the second negative electrode collector, and the second separator, or is different from a thickness of at least one of the third positive electrode collector, the third negative electrode collector, and the third separator.

12. The rechargeable battery of claim 10 , wherein the second and third electrode assemblies are thinner than the first electrode assembly.

13. The rechargeable battery of claim 10 , wherein the second positive electrode collector and the third positive electrode collector are thicker than the first positive electrode collector.

14. The rechargeable battery of claim 10 , wherein the second negative electrode collector and the third negative electrode collector are thicker than the first negative electrode collector.

15. The rechargeable battery of claim 10 , wherein the second separator and the third separator are thicker than the first separator.

16. The rechargeable battery of claim 10 , wherein a coating amount per unit area of the active material of the second positive electrode plate and a coating amount per unit area of the active material of the third positive electrode plate are greater than a coating amount per unit area of the active material of

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kim Min-Han
• Moon Joong-Ho
• Han Ju-Hyeong
• Kim Kyoung-Hyun
• Park Do-Hyung
• Park Han-Eol
• Kwon Seon-Young
• Song Yu-Mi
• Hong Ming-Zi
• Kim Ki-Hyun
• Kim Sang-Hoon
• Kang Sun-Ho

Classifications

• H01M4/02

  Electrodes composed of, or comprising, active material · CPC title

• H01M50/449

  having a layered structure · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2004/029

  Bipolar electrodes · CPC title

• H01M50/46

  Separators, membranes or diaphragms characterised by their combination with electrodes · CPC title