Swelling current interrupt device

Patent metadata

Field	Value
Publication number	US-2016149201-A1
Application number	US-201514678935-A
Country	US
Kind code	A1
Filing date	Apr 4, 2015
Priority date	Nov 20, 2014
Publication date	May 26, 2016
Grant date	—

Abstract

A swelling current interrupt device (CID) includes: a battery unit connection terminal configured to be fixed to a pouch; and a lead tab connection terminal configured to be fixed to the pouch and electrically connected to the battery unit connection terminal, wherein any one of the battery unit connection terminal and the lead tab connection terminal is broken by an expansion force of the pouch which is generated when the pouch expands to interrupt the electrical connection between the battery unit connection terminal and the lead tab connection terminal.

First claim

What is claimed is:

1 . A swelling current interrupt device (CID), comprising:
a battery unit connection terminal configured to be fixed to a pouch; and a lead tab connection terminal configured to be fixed to the pouch and electrically connected to the battery unit connection terminal, wherein any one of the battery unit connection terminal and the lead tab connection terminal is broken by an expansion force of the pouch which is generated when the pouch expands to interrupt the electrical connection between the battery unit connection terminal and the lead tab connection terminal.

2 . The swelling CID according to claim 1 , wherein the battery unit connection terminal extends from a battery unit embedded in the pouch to connect the battery unit to a component.

3 . The swelling CID according to claim 2 , wherein the battery unit has a wound jelly-like shape.

4 . The swelling CID according to claim 1 , wherein the battery unit connection terminal includes:
a bent surface part configured to contact the lead tab connection terminal, be bent to guide a deformation of the battery unit connection terminal, and protrude toward a lower surface of the battery unit connection terminal, and a bonding part configured to be bonded to the lead tab connection terminal and the pouch.

5 . The swelling CID according to claim 4 , wherein:
an upper surface of the battery unit connection terminal is bonded to the pouch, and a rest part of the lead tab connection terminal, excluding a cut part in a lower surface of the lead tab connection terminal, is attached to the pouch.

6 . The swelling CID according to claim 5 , wherein the cut part is provided with a V-notch which guides a cutting of the lead tab connection terminal.

7 . A pouch cell including a battery unit, a lead tab for connecting the battery unit to a component, and a pouch packaging the battery unit, comprising:
a swelling current interrupt device (CID) configured to be equipped between the battery unit and the lead tab so as to be broken by an expansion force of the pouch which is generated when the pouch expands.

8 . The pouch cell according to claim 7 , wherein the swelling CID includes:
a battery unit connection terminal configured to be electrically connected to the battery unit, and a lead tab connection terminal configured to be electrically connected to the battery unit connection terminal and electrically connected to the lead tab.

9 . The pouch cell according to claim 8 , wherein:
the battery unit connection terminal is provided with a bent surface part having a shape deformed along an expansion direction of the pouch when the pouch expands, and the lead tab connection terminal is provided with a cut part along the bent surface part when the pouch expands and is separated from the lead tab connection terminal.

10 . The pouch cell according to claim 9 , wherein the cut part is provided with a V-notch which guides a cutting of the lead tab connection terminal.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Min Hong Seok
• Kim Ik Kyu
• Choi Sung Min
• Ahn Seung Ho

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0587

  of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators · CPC title

• H01M2200/20

  Pressure-sensitive devices · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title