Secondary battery

Patent metadata

Field	Value
Publication number	US-10003109-B2
Application number	US-201514666230-A
Country	US
Kind code	B2
Filing date	Mar 23, 2015
Priority date	May 8, 2014
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

A secondary battery includes an electrode assembly, and a case configured to accommodate the electrode assembly. At least a portion of the case includes a first insulation layer, a second insulation layer, and a capacitor between the first insulation layer and the second insulation layer, and the first insulation layer is nearer to the electrode assembly than the second insulation layer.

First claim

What is claimed is:

1. A secondary battery comprising:
an electrode assembly; and
a case configured to accommodate the electrode assembly,
wherein at least a portion of the case comprises a first insulation layer, a second insulation layer, and a capacitor between the first insulation layer and the second insulation layer,
wherein the capacitor comprises:
a first metal layer on the first insulation layer;
an electrolyte layer on the first metal layer; and
a second metal layer on the electrolyte layer, and

wherein the first insulation layer is nearer to the electrode assembly than the second insulation layer.

2. The secondary battery of claim 1 , wherein the portion of the case comprising the capacitor has a thickness in a range of 130 to 200 pm.

3. The secondary battery of claim 1 , wherein an active material is on a surface of each of the first and second metal layers that faces the electrolyte layer.

4. The secondary battery of claim 1 , wherein each of the first and second metal layers comprises aluminum.

5. The secondary battery of claim 1 , wherein the case comprises a first sub-case and a second sub-case, and
wherein the second sub-case comprises the capacitor.

6. The secondary battery of claim 5 , wherein the first sub-case has a recessed receiving part that is configured to accommodate the electrode assembly, and
wherein the second sub-case covers the recessed receiving part.

7. The secondary battery of claim 6 , wherein the first sub-case comprises:
a first insulation layer;
a second insulation layer; and
a metal layer between the first insulation layer and the second insulation layer,
wherein the first insulation layer is nearer to the electrode assembly than the second insulation layer.

8. The secondary battery of claim 5 , wherein the first sub-case has a thickness in a range of 50 to 80 μm.

9. The secondary battery of claim 5 , wherein the first sub-case comprises the capacitor.

10. The secondary battery of claim 1 , wherein the electrode assembly comprises a first electrode plate, a second electrode plate, and a separator between the first and second electrode plates.

11. The secondary battery of claim 1 , wherein the electrode assembly comprises a first electrode,
wherein the capacitor comprises a second electrode, and
wherein the first electrode and the second electrode are electrically coupled to each other.

12. The secondary battery of claim 1 , wherein the electrode assembly and the capacitor are electrically coupled to each other in parallel.

13. The secondary battery of claim 1 , wherein the case comprises a pouch.

14. The secondary battery of claim 1 , wherein the electrode assembly comprises a first electrode tab and a second electrode tab extending outside of the case, and
wherein the case further comprises a third electrode tab and a fourth electrode tab extending therefrom, the third and fourth electrode tabs being electrically connected to the capacitor.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kim Hong Jeong
• Lee Jong Ki

Classifications

• H01M50/55

  on the same side of the cell · CPC title

• H01M2/0212

  Electricity · mapped topic

• H01M10/4264 Primary

  with capacitors · CPC title

• H01M2220/30

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

• H01M2/0217

  Electricity · mapped topic