Rechargeable battery

Patent metadata

Field	Value
Publication number	US-9590218-B2
Application number	US-201314074887-A
Country	US
Kind code	B2
Filing date	Nov 8, 2013
Priority date	Jan 30, 2013
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

A rechargeable battery includes an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate, a can having an opening at one side thereof through which the electrode assembly is inserted, the electrode assembly being accommodated in the inside of the can, and a cap plate that seals the opening of the can. The can includes a first vent on a first side surface of the can, and a second vent on a second side surface of the can.

First claim

What is claimed is:

1. A rechargeable battery, comprising:
an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate;
a can having an opening at one side thereof through which the electrode assembly is inserted, the electrode assembly being accommodated in the inside of the can; and
a cap plate that seals the opening of the can,
the can including:
a first vent having a first recess on a lower portion of a first side surface of the can; and
a second vent having a second recess on an upper portion of a second side surface of the can, wherein:
the second vent is closer to the cap plate than the first vent, and
a depth of the first recess of the first vent is deeper than a depth of the second recess of the second vent.

2. The rechargeable battery as claimed in claim 1 , wherein the first vent satisfies a following conditional inequality 1:

8.5
⁢
%

<

(

t
-

d
1

)

t

<

25
⁢
%

,

〈

conditional
⁢

⁢
inequality
⁢

⁢
1

〉

where d1 represents the depth of the first vent, and t represents a thickness of the can.

3. The rechargeable battery as claimed in claim 1 , wherein a maximum depth of the second vent is about 0.5 times the depth of the first vent.

4. The rechargeable battery as claimed in claim 1 , wherein the depth of the first vent satisfies a following conditional inequality 2:
0.03 mm< t−d 1 <0.07 mm,  <conditional inequality 2>

where d1 represents the depth of the first vent, and t represents a thickness of the can.

5. The rechargeable battery as claimed in claim 1 , wherein:
any one of the first vent and the second vent extends along an oblique direction with respect to a thickness direction of the cap plate, and
another one of the first vent and the second vent extends parallel to the thickness direction of the cap plate or extends along a perpendicular direction with respect to the thickness direction of the cap plate.

6. A rechargeable battery, comprising:
an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate;
a can formed of a metallic material and having an opening at one side thereof through which the electrode assembly is inserted, the electrode assembly being accommodated inside the can; and
a cap plate that is welded to the can to seal the opening of the can,
the can including:
a first vent having a first recess on a lower portion of a first side surface of the can; and
a second vent having a second recess on an upper portion of a second side surface of the can, wherein:
the second vent is closer to the cap plate than the first vent, and
a depth of the first recess of the first vent is deeper than a depth of the second recess of the second vent.

7. A rechargeable battery, comprising:
an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate;
a can having an opening at one side thereof through which the electrode assembly is inserted, the electrode assembly being accommodated inside the can; and
a cap plate that seals the opening of the can,
wherein the can includes:
a first side surface and a second side surface that extend in a thickness direction of the cap plate from a longer side portion of the cap plate, the first side surface and the second side surface facing in opposite directions from each other;
a third side surface and a fourth side surface extend along the thickness direction of the cap plate from a shorter side portion of the cap plate, the third side surface and the fourth side surface facing in opposite directions from each other;
a first vent having a first recess on a lower portion of the first side surface; and
a second vent having a second recess on an upper portion of the second side surface, wherein:
the second vent is closer to the cap plate than the first vent, and
a depth of the first recess of the first vent is deeper than a depth of the second recess of the second vent.

8. The rechargeable battery as claimed in claim 7 , wherein
the first vent is on one side of the lower portion of the first side surface, and
the second vent is on one side of the upper portion of the second side surface.

9. The rechargeable battery as claimed in claim 8 , wherein:
any one of the first vent and the second vent extends along an oblique direction with respect to the thickness direction of the cap plate, and
another one of the first vent and the second vent extends parallel to the thickness direction of the cap plate or extends along a perpendicular direction with respect to the thickness direction of the cap plate.

10. The rechargeable battery as claimed in claim 7 , wherein the first vent satisfies a following conditional inequality 1:

8.5
⁢
%

<

(

t
-

d
1

)

t

<

25
⁢
%

,

〈

conditional
⁢

⁢
inequality
⁢

⁢

Assignees

• Samsung Sdi Co Ltd

Inventors

• Roh Sae-Weon
• Song Sung-Ho

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M50/15

  for prismatic or rectangular cells (H01M50/153 takes precedence) · CPC title

• H01M10/0431 Primary

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

• H01M50/103 Primary

  prismatic or rectangular (H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/147

  Lids or covers · CPC title