MANUFACTURING METHOD OF ELECTRIC STORAGE DEVICE AND ELECTRIC STORAGE DEVICE

• US 20130143111A1
• Filed: 08/03/2011
• Published: 06/06/2013
• Est. Priority Date: 08/17/2010
• Status: Active Grant

• Current Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation)
• Original Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation)
• Inventors: Tsutsumi, Masakazu, Hoshino, Motoki, Nakamura, Jun, Yoshitake, Shinsuke, Sasaki, Takeshi
• Granted Patent: US 10,115,958 B2
• Time in Patent Office: Days
• US Class Current: 429/179
• CPC Class Codes: H01M 50/533 characterised by the shape of the leads or tabs
• CPC Class Codes: H01M 50/534 characterised by the material of the leads or tabs
• CPC Class Codes: H01M 50/538 Connection of several leads or tabs of wound or folded electrode stacks
• CPC Class Codes: H01M 50/55 on the same side of the cell
• CPC Class Codes: H01M 50/553 Terminals adapted for prismatic, pouch or rectangular cells
• CPC Class Codes: H01M 50/567 by fixing means, e.g. screws, rivets or bolts
• CPC Class Codes: H01M 50/645 Plugs
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y10T 29/49108 Electric battery cell making
• CPC Class Codes: Y10T 29/4911 including sealing

Abstract

A manufacturing method of an electric storage device includes: a current collector assembly step of disposing a current collector between an electrolyte solution pouring opening and a power generating element so as to block a view of the power generating element from the electrolyte solution pouring opening; an electrolyte solution pouring step of pouring an electrolyte solution through the electrolyte solution pouring opening; and a sealing step of disposing a sealing member at the electrolyte solution pouring opening and sealing the electrolyte solution pouring opening by welding.

Claims

1. A manufacturing method of an electric storage device, the method comprising:

a current collector assembly step of disposing a current collector between an electrolyte solution pouring opening and an electric storage element so as to block a view of the electric storage element from the electrolyte solution pouring opening;

an electrolyte solution pouring step of pouring an electrolyte solution through the electrolyte solution pouring opening into a case; and

a sealing step of disposing a sealing member at the electrolyte solution pouring opening and sealing the electrolyte solution pouring opening by welding,

for the electric storage device including

the case having the electrolyte solution pouring opening through which the electrolyte solution is to be poured into the case,

the electric storage element housed in the case,

an electrode terminal disposed on an outer side of the case, and

the current collector for electrically connecting the electric storage element and the electrode terminal.

2. The manufacturing method of the electric storage device according to claim 1, wherein

a wide portion having a larger width than an opening width of the electrolyte solution pouring opening is formed at the current collector, and

the wide portion is disposed between the electrolyte solution pouring opening and the electric storage element in the current collector assembly step.

3. An electric storage device comprising:

a case having an electrolyte solution pouring opening through which an electrolyte solution is to be poured into the case;

an electric storage element housed in the case;

an electrode terminal disposed on an outer side of the case; and

a current collector having at least a first attitude portion disposed in an attitude along a face, in which the electrolyte solution pouring opening is formed, to block a view of the electric storage element from the electrolyte solution pouring opening, the current collector electrically connecting the electric storage element and the electrode terminal.

4. The electric storage device according to claim 3, wherein

the case is substantially formed into a flat rectangular parallelepiped shape, the electrolyte solution pouring opening is formed in a face of the case mounted with the electrode terminal,

the current collector includes the first attitude portion and a second attitude portion that is in an attitude along a side face of the case substantially orthogonal to the face in which the electrolyte solution pouring opening is formed, the first attitude portion and the second attitude portion being formed by a plate-shaped member bent into a substantially L shape.

5. The electric storage device according to claim 3, wherein

a through hole is formed in a position displaced from a position of the current collector facing the electrolyte solution pouring opening.

6. The electric storage device according to claim 3, further comprising an insulating sealing member disposed between the case and the current collector when the current collector and a wiring member passing through the case are mounted with the case interposed therebetween, wherein

the sealing member has an extending portion for entering a gap formed between the current collector and a side face of the case substantially orthogonal to the face in which the electrolyte solution pouring opening is formed.

7. The electric storage device according to claim 4, wherein

a through hole is formed in a position displaced from a position of the current collector facing the electrolyte solution pouring opening.

8. The electric storage device according to claim 4, further comprising an insulating sealing member disposed between the case and the current collector when the current collector and a wiring member passing through the case are mounted with the case interposed therebetween, wherein

the sealing member has an extending portion for entering a gap formed between the current collector and a side face of the case substantially orthogonal to the face in which the electrolyte solution pouring opening is formed.