Method for Manufacturing Film-Packaged Cell

Patent metadata

Field	Value
Publication number	US-2016294014-A1
Application number	US-201415035559-A
Country	US
Kind code	A1
Filing date	Oct 16, 2014
Priority date	Nov 11, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

A film-packaged cell has a flat rectangular shape where power-generating element is housed in packaging body together with an electrolytic solution, the film-packaged cell being sealed along four edges of the packaging body in a state where terminals are led out through one edge thereof. In an electrolyte injection step, the electrolytic solution is injected into bag-shaped body where three edges excluding the upper edge of the packaging body are sealed in an orientation where the terminals are protruding laterally, the electrolytic solution being injected from the side of the opening upper edge. In a partial sealing step performed before the electrolyte injection step, only one section of opening upper edge of the bag-shaped body near edge through which terminals are led out is partially sealed, thereby preventing the electrolytic solution from leaking out during electrolyte injection.

First claim

1 . A manufacturing method for a film-packaged cell in which a power-generating element produced by laminating a positive electrode plate and a negative electrode plate through a separator is housed in a flat rectangular packaging body together with an electrolytic solution and sealed along four edges of the packaging body in a state where terminals are led out through one edge thereof, the manufacturing method for a film-packaged cell comprising:
an electrolyte injection step for injecting an electrolytic solution into a bag-shaped body in which three edges excluding an upper edge of the packaging body are sealed in an orientation where the terminals are protruding laterally, through the opening upper edge; and a partial sealing step conducted before the electrolyte injection step for partially sealing the opening upper edge of the bag-shaped body only at a section disposed in the vicinity of the edge through which the terminals are led out.

2 . The manufacturing method for a film-packaged cell, as claimed in claim 1 , wherein the bag-shaped body is pierced at its four corners to form locator holes for positioning purpose, and in the partial sealing step the periphery of one locator hole is partially sealed to include at least a lower section disposed underneath the locator hole.

3 . The manufacturing method for a film-packaged cell, as claimed in claim 2 , wherein a sealed section subjected to sealing in the partial sealing step encloses the locator hole from three directions with the lower section and both-side sections.

4 . The manufacturing method for a film-packaged cell, as claimed in claim 2 , wherein a sealed section subjected to sealing in the partial sealing step is shaped into a letter L comprising the lower section disposed underneath the locator hole and a side section disposed farther from the edge through which the terminals are led out, and
the lower section of the sealed section disposed underneath the locator hole is perpendicular to a sealing line extending along the edge through which the terminals are led out.

5 . The manufacturing method for a film-packaged cell, as claimed in claim 1 , wherein in the electrolyte injection step the electrolytic solution is injected in a vacuum state.

6 . The manufacturing method for a film-packaged cell, as claimed in claim 1 , wherein the vicinity of the edge through which the terminals are led out is disposed along the opening upper edge of the bag-shaped body and closer to the terminals than an electrolyte injection position.

Assignees

• Nissan Motor
• Automotive Energy Supply Corp

Inventors

• Shirai Satoshi
• Akutsu Nobuaki
• Takatsuka Takuya

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/131

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M10/0585 Primary

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

• H01M4/0435

  Rolling or calendering · CPC title