Rechargeable battery

Patent metadata

Field	Value
Publication number	US-9680136-B2
Application number	US-201414568528-A
Country	US
Kind code	B2
Filing date	Dec 12, 2014
Priority date	Jun 17, 2014
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A rechargeable battery including a case; a cap plate installed on the case; and a terminal, the terminal including a terminal pillar protruding from the cap plate, and a terminal plate coupled to the terminal pillar, wherein the terminal pillar includes a first pillar coupled to the terminal plate; second pillar coupled to the first pillar, and a welding member on an exterior of the first pillar or the second pillar.

First claim

What is claimed is:

1. A rechargeable battery, comprising:
a case;
a cap plate installed on the case; and
a terminal, the terminal including:
a terminal pillar protruding from the cap plate, and
a terminal plate coupled to the terminal pillar,

wherein the terminal pillar includes:
a first pillar coupled to the terminal plate;
a second pillar coupled the first pillar; and

a welding member on an exterior of the first pillar or the second pillar, wherein:
the first pillar includes a groove,
the second pillar includes a protrusion engaged with the groove, and
the welding member is on a surface of the protrusion.

2. The rechargeable battery as claimed in claim 1 , wherein the terminal plate and the first pillar are made of a same material.

3. The rechargeable battery as claimed in claim 1 , wherein the terminal plate and the first pillar are made of aluminum or an aluminum alloy.

4. The rechargeable battery as claimed in claim 1 , wherein the first pillar and the second pillar are made of different materials.

5. The rechargeable battery as claimed in claim 1 , wherein:
the first pillar is made of aluminum or an aluminum alloy, and
the second pillar is made of copper or a copper alloy.

6. The rechargeable battery as claimed in claim 1 , wherein the welding member is made of an alloy that includes aluminum and silicon.

7. The rechargeable battery as claimed in claim 6 , wherein the alloy of the welding member is made of about 80 to about 95 wt % aluminum and about 5 to about 20 wt % silicon.

8. The rechargeable battery as claimed in claim 1 , wherein the welding member is made of an alloy that includes tin and nickel.

9. The rechargeable battery as claimed in claim 8 , wherein the alloy of the welding member is made of about 60 to about 70 wt % tin and about 30 to about 40 wt % nickel.

10. The rechargeable battery as claimed in claim 1 , wherein the first pillar and the terminal plate are coupled to each other by welding.

11. The rechargeable battery as claimed in claim 1 , further comprising a second terminal, the second terminal including:
a second terminal pillar protruding from the cap plate, and
a second terminal plate coupled to the second terminal pillar.

12. The rechargeable battery as claimed in claim 11 , wherein the second terminal pillar and the second terminal plate are made of a same material.

13. The rechargeable battery as claimed in claim 1 , further comprising an electrode assembly within the case, the electrode assembly being electrically connected to the terminal, wherein a winding axis of the electrode assembly is perpendicular to a terminal axis of the terminal.

14. The rechargeable battery as claimed in claim 1 , further comprising an electrode assembly within the case, the electrode assembly being electrically connected to the terminal, wherein a winding axis of the electrode assembly is parallel to a terminal axis of the terminal.

15. The rechargeable battery as claimed in claim 14 , further comprising an electrode tab between the electrode assembly and the terminal, wherein the electrode tab extends from a top end of the electrode assembly to a bottom end of the terminal and is directly connected to the terminal.

16. The rechargeable battery as claimed in claim 15 , wherein the electrode tab is:
an uncoated portion of the electrode assembly, the uncoated portion not being coated with an active material, or
a separate member connected to the uncoated portion of the electrode assembly.

17. The rechargeable battery as claimed in claim 15 , wherein the electrode tab is connected to the terminal and is bent.

18. The rechargeable battery as claimed in claim 17 , wherein the electrode assembly includes at least one pair of electrode assemblies.

19. A rechargeable battery, comprising:
a case;
a cap plate installed on the case; and
a terminal, the terminal including:
a terminal pillar protruding from the cap plate, and
a terminal plate coupled to the terminal pillar,

wherein the terminal pillar includes:
a first pillar coupled to the terminal plate;
a second pillar coupled the first pillar; and

a welding member on an exterior of the first pillar or the second pillar, wherein:
the first pillar includes a protrusion,
the second pillar includes a groove engaged with the protrusion, and
the welding member is on a surface of the protrusion.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Yoo Seungyeol
• Lee Huijun

Classifications

• H01M10/0431 Primary

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title

• C22C21/02

  with silicon as the next major constituent · CPC title

• B23K35/22

  characterised by the composition or nature of the material · CPC title

• C22C13/00

  Alloys based on tin · CPC title

• H01M50/00 Primary

  Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells · CPC title