# US 9,882,231 B2 · Sealing tool for pouch type secondary battery

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- Number: US 9,882,231 B2
- Document ID: US9882231B2
- Status: Granted
- Kind: B2
- Application number: 14/414,638
- Filed: 2014-07-28
- Published: 2016-02-18
- Granted: 2018-01-30
- Earliest claimed: 2013-08-30
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Jong Hyun Won; Min Su Kim; Gyo Ryun No; Seul Ki Kim
- Web page: https://patentgrep.com/patent/US9882231B2

## CPC

- H01M 10/0404: {Machines for assembling batteries}
- H01M 50/553: Terminals adapted for prismatic, pouch or rectangular cells
- H01M 50/178: for pouch or flexible bag cells
- H01M 50/55: on the same side of the cell
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- 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
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present invention relates to a sealing tool for a pouch type secondary battery, which seals a pouch provided with an electrode assembly therein, the sealing tool including: a holder elevatably disposed on each of upper and lower sides of the pouch; and a sealing block coupled to the holder to contact the pouch by the elevation of the holder, thereby sealing the pouch. The sealing block and the holder are spaced apart from each other to define a space therebetween. According to the present invention, a spacing member is interposed between the holder and the sealing block of the sealing tool to define a space into which the sealing block is deformable, thereby minimizing the deformation of a sealing surface of the sealing block. Thus, the sealing part of the pouch may have a uniform thickness to prevent an electrolyte within the pouch from leaking to the outside.

## Claims

### Claim 1

A sealing tool for a pouch type secondary battery, which seals a pouch provided with an electrode assembly therein, the sealing tool comprising:
a holder elevatably disposed on a side of the pouch; and
a sealing block coupled to the holder to contact the pouch by the elevation of the holder, thereby sealing the pouch, the sealing block and the holder spaced apart from each other in a first direction to define a space therebetween;
a first spacing member in the space between the sealing block and the holder; and
a second spacing member in the space between the sealing block and holder, the second spacing member spaced apart from the first spacing member in a second direction,
wherein the first spacing member and second spacing member extend between a top surface of the sealing block and a bottom surface of the holder.

### Claim 2 (depends on 1)

The sealing tool of claim 1, wherein the spacing members are provided as an elastic body having elasticity in a direction in which the holder is elevated.

### Claim 3 (depends on 1)

The sealing tool of claim 1, wherein the spacing members are provided as a feeler gauge.

### Claim 4 (depends on 1)

The sealing tool of claim 1, wherein a void is created between the first spacing member, the second spacing member, the holder and the sealing block, and
wherein the sealing block can expand into the void.

### Claim 5 (depends on 1)

The sealing tool of claim 1, further comprising a heating coil built in the sealing block.

### Claim 6

A sealing tool for a pouch type secondary battery, which seals a pouch provided with an electrode assembly therein, the sealing tool comprising:
a holder elevatably disposed on a side of the pouch;
a sealing block coupled to the holder to contact the pouch by the elevation of the holder, thereby sealing the pouch, the sealing block and the holder spaced apart from each other in a first direction, and
a space between the sealing block and the holder,
a first spacing member in the space between the sealing block and holder; and
a second spacing member in the space between the sealing block and holder, the second spacing member spaced apart from the first spacing member in a second direction,
wherein the first spacing member and second spacing member extend between a top surface of the sealing block and a bottom surface of the holder, and
wherein the sealing block can expand into the space.

### Claim 7 (depends on 6)

The sealing tool of claim 6, further comprising a heating coil in the sealing block.

### Claim 8

A sealing tool for a pouch type secondary battery, which seals a pouch provided with an electrode assembly therein, the sealing tool comprising:
a pair of sealing jaws, each sealing jaw comprising:
a holder elevatably disposed on a side of the pouch; and
a sealing block coupled to the holder to contact the pouch by the elevation of the holder, thereby sealing the pouch, the sealing block and the holder spaced apart from each other in a first direction to define a space therebetween;
a first spacing member in the space between the sealing block and holder; and
a second spacing member in the space between the sealing block and holder, the second spacing member spaced apart from the first spacing member in a second direction,
wherein the first spacing member and second spacing member extend between a top surface of the sealing block and a bottom surface of the holder.