# US 2014/0212709 A1 · Rechargeable battery

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- Number: US 2014/0212709 A1
- Document ID: US20140212709A1
- Status: Published application
- Kind: A1
- Application number: 14/074,887
- Filed: 2013-11-08
- Published: 2014-07-31
- Earliest claimed: 2013-01-30
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Sae-Weon ROH; Sung-Ho SONG
- Web page: https://patentgrep.com/patent/US20140212709A1

## CPC

- H01M 50/3425: {in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member}
- H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)}
- H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence)
- H01M 50/15: for prismatic or rectangular cells (H01M50/153 takes precedence)
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## 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.

## Claims

### Claim 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 on a first side surface of the can; and
a second vent on a second side surface of the can.

### Claim 2 (depends on 1)

The rechargeable battery as claimed in claim 1, wherein the first side surface of the can and the second side surface of the can are located on opposite sides of the rechargeable batter from each other.

### Claim 3 (depends on 1)

The rechargeable battery as claimed in claim 1, wherein
the first vent is on a lower portion of the first side surface of the can, and
the second vent is on an upper portion of the second side surface of the can.

### Claim 4 (depends on 3)

The rechargeable battery as claimed in claim 3, wherein the first vent and the second vent are disposed away from each other.

### Claim 5 (depends on 1)

The rechargeable battery as claimed in claim 1, wherein
the first vent and the second vent are each in a form of a recess, and
a depth of the first vent is deeper than a depth of the second vent.

### Claim 6 (depends on 5)

The rechargeable battery as claimed in claim 5, 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.

### Claim 7 (depends on 5)

The rechargeable battery as claimed in claim 5, wherein a maximum depth of the second vent is about 0.5 times the depth of the first vent.

### Claim 8 (depends on 5)

The rechargeable battery as claimed in claim 5, wherein the depth of the first vent satisfies a following conditional inequality 2:
0.03 mm<t−d1<0.07 mm, <conditional inequality 2>
where d1 represents the depth of the first vent, and t represents a thickness of the can.

### Claim 9 (depends on 1)

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.

### Claim 10

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 on a lower portion of a first side surface of the can; and
a second vent on an upper portion of a second side surface of the can, the second side surface being on an opposite side of the can from the first side surface.

### Claim 11

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 on a lower portion of the first side surface; and
a second vent on an upper portion of the second side surface.

### Claim 12 (depends on 11)

The rechargeable battery as claimed in claim 11, 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.

### Claim 13 (depends on 12)

The rechargeable battery as claimed in claim 12, 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.

### Claim 14 (depends on 11)

The rechargeable battery as claimed in claim 11, wherein
the first vent and the second vent are each in a form of a recess, and
a depth of the first vent is deeper than a depth of the second vent.

### Claim 15 (depends on 14)

The rechargeable battery as claimed in claim 14, 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 represent a thickness of the can.

### Claim 16 (depends on 15)

The rechargeable battery as claimed in claim 15, wherein a maximum depth of the second vent is about 0.5 times the depth of the first vent.

### Claim 17 (depends on 15)

The rechargeable battery as claimed in claim 15, wherein the depth of the first vent satisfies a following conditional inequality 2:
0.03 mm<t−d1<0.07 mm, <conditional inequality 2>
where d1 represents the depth of the first vent, and t represents a thickness of the can.

### Claim 18 (depends on 11)

The rechargeable battery as claimed in claim 11, wherein:
the first vent is in the lower portion of the first side surface and is on one side of the first side surface adjacent to the third side surface, and
the second vent is in the upper portion of the second side surface and is on one side of the second side surface adjacent to the fourth side surface.

### Claim 19 (depends on 18)

The rechargeable battery as claimed in claim 18, wherein
the first vent and the second vent are each in a form of a recess, and
a depth of the first vent is deeper than a depth of the second vent.

### Claim 20 (depends on 11)

The rechargeable battery as claimed in claim 11, wherein the can is formed of a metallic material.