Metal working – Method of mechanical manufacture – Electrical device making
Patent
1997-08-01
1998-05-19
Nuzzolillo, M.
Metal working
Method of mechanical manufacture
Electrical device making
429210, H01M 1038
Patent
active
057529876
ABSTRACT:
Method for producing an improved rechargeable battery, containing a plurality of stacked, nested bipolar cells, in which each bipolar cell is formed by inserting into a bipolar cup a porous condensed phase positive electrode, a porous dielectric separator, and a gas electrode, adding to the bipolar cell cups a predetermined volume of a liquid electrolyte, and a plurality of the bipolar cell cups are stacked in a nesting relationship within a battery housing pressure vessel. The invention involves the steps of subjecting the stack of bipolar cell cups within the housing to the application of an initial low pressure, up to about 5 psi, to allow the liquid electrolyte to be absorbed by the porous condensed phase positive electrode and by the porous separator, connecting the cells to the battery terminals and closing the pressure vessel, and cycling the battery at a plurality of charge--discharge cycles starting at a low current up to about 20% of normal operational current and gradually increasing to normal ampere--hour charge, to cause the expansion of the porous electrode and separator and full absorption of the liquid electrolyte. Finally, the stack of bipolar cell cups is subjected to the application of a higher pressure, greater than about 20 psi, to seat and seal the cups to each other and compress the stack to a predetermining height within the battery housing without displacing any of the original electrolyte from any of the bipolar cells.
REFERENCES:
patent: 4872957 (1989-10-01), Dong et al.
patent: 5652073 (1997-07-01), Lenhart et al.
Nuzzolillo M.
Space Systems Loral, Inc.
LandOfFree
Method for producing improved electrolyte-retention bipolar cell does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing improved electrolyte-retention bipolar cell, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing improved electrolyte-retention bipolar cell will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1848653