Method for manufacturing film-packaged cell

Patent metadata

Field	Value
Publication number	US-9847556-B2
Application number	US-201415035559-A
Country	US
Kind code	B2
Filing date	Oct 16, 2014
Priority date	Nov 11, 2013
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

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

The invention claimed is:

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 upper and lower edges and first and second side edges of the packaging body in a state where terminals are led out through the first side 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 the first and second side edges and the lower edge excluding the upper edge of the packaging body are sealed in an orientation where the terminals protrude laterally from the first side edge, through the open upper edge; and
a partial sealing step conducted before the electrolyte injection step for partially sealing the open upper edge of the bag-shaped body only at a first seal section disposed in a vicinity of the first side edge through which the terminals are led out, wherein in the electrolyte injection step, the electrolytic solution is injected in a vacuum state,
wherein a rest of the upper edge except the first seal section is substantially longer than a width of an injection nozzle for injecting the electrolyte solution, such that the rest of the upper edge is open even during the injection of the electrolytic solution from the injection nozzle.

2. 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, 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 the vicinity of the first side edge through which the terminals are led out is disposed along the open upper edge of the bag-shaped body and closer to the terminals than an electrolyte injection position in the electrolyte injection step.

6. The manufacturing method for a film-packaged cell, as claimed in claim 1 , wherein, after the electrolyte injection step, the open upper edge of the bag-shaped body is fully sealed between the first and second side edges at a second seal section that is closer to the terminals than the first seal section of the partial sealing step, and then the bag-shaped body is cut at a position between the first and second seal sections along the upper edge of the bag-shaped body to manufacture the film-packaged cell including the second seal section and excluding the first seal section as a scrap.

Assignees

• Nissan Motor
• Automotive Energy Supply Corp

Inventors

• Shirai Satoshi
• Akutsu Nobuaki
• Takatsuka Takuya

Classifications

• H01M4/0404

  by coating on electrode collectors · 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

• H01M4/131

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

• H01M10/052

  Li-accumulators · CPC title

• H01M4/133

  Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title