ELECTRIC DOUBLE LAYER DEVICE

• US 20170200567A1
• Filed: 01/07/2016
• Published: 07/13/2017
• Est. Priority Date: 01/07/2016
• Status: Active Grant

• Current Assignee: Maxwell Technologies Korea Co., Ltd. (UCAP Power, Inc.)
• Original Assignee: Nesscap Company Limited (Tesla Inc.)
• Inventors: Kim, Young Jin, Jung, Gwan Goo
• Granted Patent: US 10,692,662 B2
• Time in Patent Office: Days
• CPC Class Codes: H01G 11/70 characterised by their structure
• CPC Class Codes: H01G 11/74 Terminals, e.g. extensions of current collectors
• CPC Class Codes: H01G 11/78 Cases; Housings; Encapsulations; Mountings
• CPC Class Codes: H01G 11/80 Gaskets; Sealings
• CPC Class Codes: H01G 11/82 Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 4/667 in the form of layers, e.g. coatings
• CPC Class Codes: H01M 50/538 Connection of several leads or tabs of wound or folded electrode stacks
• CPC Class Codes: H01M 50/645 Plugs
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

An electric double layer device is configured such that a lower terminal is directly withdrawn from a lower collecting plate in the same manner as the manner in which an upper terminal is directly withdrawn from an upper collecting plate, thereby improving productivity and ease of assembly, and in addition increasing connection force.

Claims

1. An electric double layer device comprising a wound unit, which comprises a first current collector and a second current collector, which are wound while being separated from each other by a separator, and a case having therein an upper opening, through which the wound unit is received, and a lower closure, wherein the electric double layer device further comprises:

a lower collecting plate connected to the first current collector of the wound unit, the lower collecting plate having a lower terminal extending upward along an outer circumference of the wound unit;

a lower insulating plate placed on the lower closure to receive the lower collecting plate;

an upper collecting plate connected to the second current collector of the wound unit, the upper collecting plate having an upper terminal extending upward;

an upper insulating plate fitted on the upper collecting plate such that the upper terminal and the lower terminal are directed upward; and

an upper nonconductive plate fitted in the case to cover the upper opening, the upper nonconductive plate having a first connection terminal and a second connection terminal respectively connected to the lower terminal and the upper terminal.

2. The electric double layer device according to claim 1, further comprising:

a first through hole and a second through hole formed respectively through the lower closure of the case and the lower insulating plate so as to be used as introduction ports of an electrolytic solution;

a rubber plug fitted in an upper part of the first through hole to seal the first through hole; and

a closure plug fitted in a lower part of the first through hole and welded to the lower part of the first through hole.

3. The electric double layer device according to claim 1, wherein

the lower terminal extends upward along the outer circumference of the wound unit, is bent so as to be placed above the upper insulating plate, and is bent upward so as to be connected to the first connection terminal,

the upper insulating plate has therein a through hole, through which the upper terminal extends, and

the upper terminal extends upward from the upper collecting plate, extends through the through hole, and is bent so as to be connected to the second connection terminal.

4. The electric double layer device according to claim 3, further comprising:

a first through hole and a second through hole formed respectively through the lower closure of the case and the lower insulating plate so as to be used as introduction ports of an electrolytic solution;

a rubber plug fitted in an upper part of the first through hole to seal the first through hole; and

a closure plug fitted in a lower part of the first through hole and welded to the lower part of the first through hole.

5. The electric double layer device according to claim 3, further comprising an upper insulating ring, which is disposed so as to be in tight contact with an edge of the upper insulation plate while receiving the lower terminal therein to enable the lower terminal to maintain a state in which the wound unit and the case are spaced apart from each other.

6. The electric double layer device according to claim 6, further comprising:

a first through hole and a second through hole formed respectively through the lower closure of the case and the lower insulating so as to be used as introduction ports of an electrolytic solution;

a rubber plug fitted in an upper part of the first through hole to seal the first through hole; and

a closure plug fitted in a lower part of the first through hole and welded to the lower part of the first through hole.