Electrical energy storage apparatus having improved coupling structure of internal terminal

Patent metadata

Field	Value
Publication number	US-2017372848-A1
Application number	US-201615543650-A
Country	US
Kind code	A1
Filing date	Jan 8, 2016
Priority date	Jan 14, 2015
Publication date	Dec 28, 2017
Grant date	—

Abstract

An electric energy storage device in which a cell assembly having electrode leads is installed in a metal case. The electric energy storage device includes an internal terminal formed with a support, connection ribs and thorough portions, and the electrode leads include a part of electrode leads compressed by the support and the connection ribs of the internal terminal and a part of electrode leads located at the thorough portions of the internal terminal to maintain a shape thereof.

First claim

What is claimed is:

1 . An electric energy storage device in which a cell assembly having electrode leads is installed in a metal case, the electric energy storage device comprising:
an internal terminal ( 120 ) formed with a support ( 121 ), connection ribs ( 122 ) and thorough portions ( 127 ) so that lower surfaces of the support ( 121 ) and the connection ribs ( 122 ) come into contact with a part of the electrode leads ( 110 ), wherein the electrode leads ( 110 ) include a part of electrode leads compressed by the support ( 121 ) and the connection ribs ( 122 ) of the internal terminal ( 120 ) and another part of electrode leads located at the thorough portions ( 127 ) of the internal terminal ( 120 ) to maintain a shape thereof.

2 . The electric energy storage device according to claim 1 ,
wherein the support ( 121 ) is located at a center of the internal terminal ( 120 ), and wherein the connection ribs ( 122 ) are arranged at a periphery of the support ( 121 ) at regular intervals with a rod shape.

3 . The electric energy storage device according to claim 2 ,
wherein an electrolyte impregnation hole ( 124 ) is formed at a center of the support ( 121 ).

4 . The electric energy storage device according to claim 2 , further comprising:
at least one reinforcing rib ( 125 ) extending in a circumferential direction of the internal terminal ( 120 ) to connect the connection ribs ( 122 ) to each other.

5 . The electric energy storage device according to claim 1 ,
wherein the electrode leads ( 110 ) are compressed according to the shape of the internal terminal ( 120 ) after cutting a portion thereof corresponding to both side surfaces ( 122 a ) of the connection ribs ( 122 ) by a cutting device.

6 . The electric energy storage device according to claim 2 ,
wherein the plurality of connection ribs ( 122 ) have flanges ( 126 ) formed at ends thereof to correspond to an inner wall of the metal case ( 150 ).

7 . The electric energy storage device according to claim 1 ,
wherein a contact area of the internal terminal ( 120 ), which comes into contact with the electrode leads ( 110 ), is 60% or above of an entire sectional area of the electrode leads ( 110 ).

Assignees

• Ls Mtron Ltd

Inventors

• Yoon Yu-Il
• Lee Ha-Young
• Bae Sang-Hyun
• Shin Dong-Il
• Ko Hyun-Seok
• Park Kyeong-Hoon
• Kang Ho-Lim

Classifications

• Y02E60/13

  Energy storage using capacitors · CPC title

• H01M10/0431

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

• H01M4/70

  characterised by shape or form · CPC title

• H01G11/82

  Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations · CPC title

• H01G11/76

  specially adapted for integration in multiple or stacked hybrid or EDL capacitors · CPC title