Wound electrode assembly for an electrochemical cell
AssigneeGates Energy Products, Inc.
InventorArthur J. Catotti
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Abstract
A wound electrode assembly for use in a sealed electrochemical cell. The wound electrode assembly has at least one electrode comprised of an electrically conductive substrate and an electrochemically active material secured to at least one face of the substrate. This one electrode defines an outer wrap for the electrode assembly. The electrochemically active material is absent from at least a portion of the exterior of the outer wrap to permit the first substrate in the outer wrap to contact at least a portion of the cell container into which the wound electrode assembly is positioned.
Claims30
In a sealed electrochemical cell having a wound electrode assembly positioned within a container, said electrode assembly having at least one electrode comprised of an electrically conductive substrate and an electrochemically active material secured to at least one face of the substrate, said one electrode defining an outer wrap for said electrode assembly, the improvement comprising:
- at least a portion of said substrate on one side thereof in said outer wrap being free of electrochemically active material and directly contacting a portion of said container, and said electrochemically active material being secured to at least a portion of the substrate in said outer wrap on the other side thereof directly opposite said one side making contact with the container.
A wound electrode assembly for use in a sealed electrochemical cell comprising:
- a first electrode plate having a first electrically conductive substrate and a first electrochemically active material secured to at least one face of said first substrate;
- a second electrode plate having a second electrically conductive substrate and an electrochemically active material secured to at least one face of said second substrate;
- and
- separator material interposed between said first electrode plate and said second electrode plate to electrically insulate said first electrode plate from said second electrode plate throughout said assembly, said first electrode plate, said second electrode plate and said separator material being wound such that said first electrode plate defines an outer wrap for said electrode assembly, said electrochemically active material being absent from at least a portion of the exterior of said outer wrap so as to expose substrate therealong, arranged and adapted to make contact with an associated cell container, and said electrochemically active material being present on the interior side of said outer wrap opposite said exposed substrate of the first electrode plate.
An electrochemical cell comprising:
- a sealed container;
- and
- a wound electrode assembly positioned within said container and comprising a first electrode plate having a first electrically conductive substrate and a first electrochemically active material secured to at least one face of said first substrate, said first electrode plate defining an outer wrap for said electrode assembly, said electrochemically active material being absent from at least a portion of the exterior face of said outer wrap so that said first substrate in said outer wrap contacts at least a portion or said container, said first electrochemically active material being present along the interior face of said outer wrap of the first electrode opposite positions where said first substrate contacts said container.
An electrochemical cell comprising:
- a sealed container;
- and
- a wound electrode assembly positioned within said container and comprising a first electrode plate having a first electrically conductive substrate of a hybrid construction formed of a metal strip a portion of which is perforated and a further portion of which is imperforate, and a first electrochemically active material secured by pressing or pasting to at least one face of said first substrate, said first electrode plate defining an outer wrap for said electrode assembly in which the imperforate portion of said substrate is positioned;
- and
- said electrochemically active material being absent from at least a portion of the exterior face of said outer wrap so that the imperforate portion of said first substrate in said outer wrap directly contacts at least a portion of said container to make electrical contact therewith, and said first electrochemically active material being present along the interior face of said outer wrap of the first electrode opposite portions where said imperforate portion of said first substrate contacts said container.
A sealed nickel-cadium electrochemical cell comprising:
- a sealed container having an inner wall formed of an electrically conductive material;
- a spirally wound electrode assembly positioned within said container and comprising a cadmium electrode plate formed of first electrically conductive substrate and electrochemically active cadmium material secured to at least one face of said first substrate, said cadmium electrode plate defining at least a portion of an outer wrap for said electrode assembly, said electrochemically active cadmium material being present on the interior face of, and absent from at least a portion of the exterior face of, said outer wrap so that said first substrate in said outer wrap contacts at least a portion of the inner wall of said container to effect electrical contact therewith;
- and said electrochemically active material being present on the interior face of said outer wrap of the first substrate opposite portions where said first substrate contacts the inner wall of said container;
- a positive electrode plate formed of a second electrically conductive substrate and electrochemically active nickel material compound secured to at least one face of said second substrate;
- a separator material interposed between said cadmium electrode plate and said nickel electrode plate to electrically insulate said electrode plates along their length substantially throughout said assembly;
- and
- an electrolyte formed of potassium hydroxide contained within the wound assembly.
Dependencies are inferred from the claim text.