METHOD AND DEVICE FOR MANUFACTURING FILM-WRAPPED ELECTRICAL DEVICE

• US 20140373344A1
• Filed: 02/07/2013
• Published: 12/25/2014
• Est. Priority Date: 02/07/2012
• Status: Active Grant

• Current Assignee: Envision AESC Japan Co., Ltd., Automotive Energy Supply Corporation (Envision Group /TX/)
• Original Assignee: Automotive Energy Supply Corporation (Envision Group /TX/), Nissan Motor Co., Ltd.
• Inventors: Takada, Koichi, Motohashi, Yuta
• Granted Patent: US 9,859,569 B2
• Time in Patent Office: Days
• US Class Current: 29/623.5
• CPC Class Codes: H01G 11/78 Cases; Housings; Encapsulations; Mountings
• CPC Class Codes: H01G 11/84 Processes for the manufacture of hybrid or EDL capacitors, or components thereof
• CPC Class Codes: H01G 13/04 Drying; Impregnating
• CPC Class Codes: H01G 9/0029 Processes of manufacture
• CPC Class Codes: H01G 9/08 Housing; Encapsulation
• CPC Class Codes: H01M 50/119 Metals
• CPC Class Codes: H01M 50/121 Organic material
• CPC Class Codes: H01M 50/124 having a layered structure
• CPC Class Codes: H01M 50/178 for pouch or flexible bag cells
• CPC Class Codes: H01M 50/548 on opposite sides of the cell
• CPC Class Codes: H01M 50/553 Terminals adapted for prismatic, pouch or rectangular cells
• CPC Class Codes: H01M 50/618 Pressure control
• CPC Class Codes: H01M 50/636 Closing or sealing filling ports, e.g. using lids
• CPC Class Codes: H01M 6/04 Cells with aqueous electrolyte
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y10T 29/49115 including coating or impregnating
• CPC Class Codes: Y10T 29/53278 Storage cell or battery

Abstract

Provided is a method for manufacturing a film-wrapped electrical device, including: a first injection step of depressurizing, to a given pressure lower than atmospheric pressure, the inside of an injection chamber (2) in which a bag-shaped laminate film wrapping member (29) is placed, the laminate film wrapping member (29) having an opening portion (29a) and housing an electrode assembly (21′) including a positive electrode and a negative electrode stacked with a separator therebetween, and injecting part of a predetermined injection amount of an electrolyte solution (20) into the wrapping member (29) through the opening portion (29a); and a second injection step of, after the first injection step, pressurizing the inside of the injection chamber (2) to a pressure higher than the given pressure and injecting the rest of the predetermined injection amount of the electrolyte solution (20).

Claims

1-5. -5. (canceled)

6. A method for manufacturing a film-wrapped electrical device, comprising:

a first injection step of

depressurizing, to a given pressure lower than atmospheric pressure, an inside of an injection chamber in which a bag-shaped laminate film wrapping member is placed, the laminate film wrapping member having an opening portion and housing an electrode assembly including a positive electrode and a negative electrode stacked with a separator therebetween, and

injecting part of a predetermined injection amount of an electrolyte solution into the wrapping member through the opening portion; and

a second injection step of after the first injection step, pressurizing the inside of the injection chamber to a pressure higher than the given pressure and lower than an average value of the given pressure and atmospheric pressure, and injecting the rest of the predetermined injection amount of the electrolyte solution.

7. The method for manufacturing a film-wrapped electrical device according to claim 6, wherein in the second injection step, the pressure inside the injection chamber is raised stepwise, and the electrolyte solution is injected with the pressure at each level maintained for a certain period of time.

8. The method for manufacturing a film-wrapped electrical device according to claim 6, wherein

in each of the first injection step and the second injection step, the solution is injected in installments, and

an injection amount in each installment in the second injection step is set larger than an injection amount in the last installment in the first injection step.

9. A device for manufacturing a film-wrapped electrical device, comprising:

a pressure adjuster device configured to adjust a pressure inside an injection chamber in which a bag-shaped laminate film wrapping member is placed, the laminate film wrapping member having an opening portion and housing an electrode assembly including a positive electrode and a negative electrode stacked with a separator therebetween;

an injector device configured to inject an electrolyte solution into the wrapping member through the opening portion; and

a controller configured to

cause the pressure adjuster device to depressurize the inside of the injection chamber to a pressure lower than atmospheric pressure,

cause the injector device to inject part of a predetermined injection amount of the electrolyte solution into the wrapping member,

further cause the pressure adjuster device to pressurize the inside of the injection chamber to a pressure higher than the pressure after the depressurization and lower than an average value of the pressure after the depressurization and atmospheric pressure, and

cause the injector device to inject the rest of the predetermined injection amount of the electrolyte solution into the wrapping member.

10. A device for manufacturing a film-wrapped electrical device, comprising:

an adjusting means for adjusting a pressure inside an injection chamber in which a bag-shaped laminate film wrapping member is placed, the laminate film wrapping member having an opening portion and housing an electrode assembly including a positive electrode and a negative electrode stacked with a separator therebetween;

an injecting means for injecting an electrolyte solution into the wrapping member through the opening portion; and

a control means for

causing the adjusting means to depressurize the inside of the injection chamber to a pressure lower than atmospheric pressure,

causing the injecting means to inject part of a predetermined injection amount of the electrolyte solution into the wrapping member,

further causing the adjusting means to pressurize the inside of the injection chamber to a pressure higher than the pressure after the depressurization and lower than an average value of the pressure after the depressurization and atmospheric pressure, and

causing the injecting means to inject the rest of the predetermined injection amount of the electrolyte solution into the wrapping member.