Coiled electrode assembly cell construction with pressure contact member
First Claim
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1. A galvanic cell comprising a coiled electrode assembly housed in a conductive container having a base with an upstanding wall defining an open end and closed by a cover;
- said coiled electrode assembly comprising a first electrode, a second electrode superimposed on said first electrode and a separator disposed between said first electrode and said second electrode and over at least one of said first and second electrodes; and
said first electrode, second electrode and separator spirally wound such that said first electrode is electronically insulated from said second electrode by said separator and a portion of said first electrode is exposed to define at least a portion of the outer wall of said coiled electrode assembly and a portion of said second electrode is exposed to define at least a portion of the inner wall of said coiled electrode assembly;
said coiled electrode assembly disposed within said container such that the exposed first electrode defining at least a portion of the outer wall of said coiled electrode assembly is in pressure contact with said container upstanding wall thereby adapting said container upstanding wall as the first terminal for said galvanic cell;
a flexible electrically conductive member disposed within the opening defined by said inner wall of said coiled electrode assembly and pressure contacting at least a portion of the exposed surface of said second electrode and exerting a radially outward force on the exposed said second electrode defining a portion of said inner wall of said coiled electrode assembly; and
said flexible electrically conductive member secured to an electrically conductive terminal at the exterior surface of said galvanic cell, said electrically conductive terminal being electrically insulated from said first terminal so that said electrically conductive terminal is adapted as the second terminal for said galvanic cell.
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Abstract
A sealed galvanic cell comprising a container and a cover having a coiled electrode assembly disposed in the container. The coiled electrode assembly has an inner exposed electrode of one polarity and an outer exposed electrode of the opposite polarity. A flexible electrically conductive member secured to the cover makes electrical contact with the inner exposed electrode and exerts a radially outward force therein while the outer exposed electrode makes electrical contact with the wall of the container.
50 Citations
23 Claims
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1. A galvanic cell comprising a coiled electrode assembly housed in a conductive container having a base with an upstanding wall defining an open end and closed by a cover;
- said coiled electrode assembly comprising a first electrode, a second electrode superimposed on said first electrode and a separator disposed between said first electrode and said second electrode and over at least one of said first and second electrodes; and
said first electrode, second electrode and separator spirally wound such that said first electrode is electronically insulated from said second electrode by said separator and a portion of said first electrode is exposed to define at least a portion of the outer wall of said coiled electrode assembly and a portion of said second electrode is exposed to define at least a portion of the inner wall of said coiled electrode assembly;
said coiled electrode assembly disposed within said container such that the exposed first electrode defining at least a portion of the outer wall of said coiled electrode assembly is in pressure contact with said container upstanding wall thereby adapting said container upstanding wall as the first terminal for said galvanic cell;
a flexible electrically conductive member disposed within the opening defined by said inner wall of said coiled electrode assembly and pressure contacting at least a portion of the exposed surface of said second electrode and exerting a radially outward force on the exposed said second electrode defining a portion of said inner wall of said coiled electrode assembly; and
said flexible electrically conductive member secured to an electrically conductive terminal at the exterior surface of said galvanic cell, said electrically conductive terminal being electrically insulated from said first terminal so that said electrically conductive terminal is adapted as the second terminal for said galvanic cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 14, 15)
- said coiled electrode assembly comprising a first electrode, a second electrode superimposed on said first electrode and a separator disposed between said first electrode and said second electrode and over at least one of said first and second electrodes; and
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8. A galvanic cell comprising a coiled electrode assembly housed in a conductive container having a base with an upstanding wall defining an open end and closed by a cover;
- said coiled electrode assembly comprising a first electrode, a second electrode superimposed on said first electrode and a separator disposed between said first electrode and said second electrode and over at least one of said first and second electrodes; and
said first electrode, second electrode and separator spirally wound such that said first electrode is electronically insulated from said second electrode by said separator and a portion of said first electrode is exposed to define at least a portion of the outer wall of said coiled electrode assembly and a portion of said second electrode is exposed to define at least a portion of the inner wall of said coiled electrode assembly;
said coiled electrode assembly disposed within said container such that the exposed first electrode defining at least a portion of the outer wall of said coiled electrode assembly is in pressure contact with said container upstanding wall thereby adapting said container as the first terminal for said galvanic cell;
a flexible electrically conductive member disposed within the opening defined by said inner wall of said coiled electrode assembly and pressure contacting at least a portion of the exposed surface of said second electrode and exerting a radially outward force on the exposed said second electrode defining a portion of said inner wall of said coiled electrode assembly; and
said flexible electrically conductive member secured to an electrically conductive terminal at the exterior surface of said galvanic cell, said electrically conductive terminal being electrically insulated from said first terminal so that said electrically conductive terminal is adapted as the second terminal for said galvanic cell;
said flexible electrically conductive member being made by bending a strip of conductive material to form a substantially U-shaped portion having two spaced-apart legs, a portion of the upper end of one leg of said U-shaped portion being bent inwardly to form a neck portion and the extreme upper end of said one leg being bent to form a tab, a portion of the upper end of the second leg of said U-shaped portion being bent in a similar manner as said first leg but in the opposite direction to form a neck portion and a top portion in said second leg, said neck portion of said first leg abutting said neck portion of said second leg with said tab secured to said cover. - View Dependent Claims (9)
- said coiled electrode assembly comprising a first electrode, a second electrode superimposed on said first electrode and a separator disposed between said first electrode and said second electrode and over at least one of said first and second electrodes; and
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16. A galvanic cell comprising a coiled electrode assembly housed in a conductive container having a base with an upstanding wall defining an open end and closed by a cover;
- said coiled electrode assembly comprising a first electrode, a second electroded superimposed on said first electrode and a separator disposed between said first electrode and said second electrode and over at least one of said first and second electrodes; and
said first electrode, second electrode and separator spirally wound such that said first electrode is electronically insulated from said second electrode by said separator and a portion of said first electrode is exposed to define at least a portion of the outer wall of said coiled electrode assembly and a portion of said second electrode is exposed to define at least a portion of the inner wall of said coiled electrode assembly;
said coiled electrode assembly disposed within said container such that the exposed first electrode defining at least a portion of the outer wall of said coiled electrode assembly is in pressure contact with said container upstanding wall thereby adapting said container as the first terminal for said galvanic cell;
a flexible electrically conductive member disposed within the opening defined by said inner wall of said coiled electrode assembly and pressure contacting at least a portion of the exposed surface of said second electrode and exerting a radially outward force on the exposed said second electrode defining a portion of said inner wall of said coiled electrode assembly; and
said flexible electrically conductive member secured to an electrically conductive terminal at the exterior surface of said galvanic cell, said electrically conductive terminal being electrically insulated from said first terminal so that said electrically conductive terminal is adapted as the second terminal for said galvanic cell;
said cover comprising an inner cover and an outer cover and said flexible electrically conductive member being secured to said inner cover;
said inner cover and said flexible electrically conductive member being formed from one integral member. - View Dependent Claims (17, 18, 19)
- said coiled electrode assembly comprising a first electrode, a second electroded superimposed on said first electrode and a separator disposed between said first electrode and said second electrode and over at least one of said first and second electrodes; and
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20. A galvanic cell comprising a coiled electrode assembly housed in a conductive container having a base with an upstanding wall defining an open end and closed by a cover;
- said coiled electrode assembly comprising a first electrode, a second electrode superimposed on said first electrode and a separator disposed between said first electrode and said second electrode and over at least one of said first and second electrodes; and
said first electrode, second electrode and separator spirally wound such that said first electrode is electronically insulated from said second electrode by said separator and a portion of said first electrode is exposed to define at least a portion of the outer wall of said coiled electrode assembly and a portion of said second electrode is exposed to define at least a portion of the inner wall of said coiled electrode assembly;
said coiled electrode assembly disposed within said container such that the exposed first electrode defining at least a portion of the outer wall of said coiled electrode assembly is in pressure contact with said container upstanding wall thereby adapting said container as the first terminal for said galvanic cell;
a flexible electrically conductive member disposed within the opening defined by said inner wall of said coiled electrode assembly and pressure contacting at least a portion of the exposed surface of said second electrode and exerting a radially outward force on the exposed said second electrode defining a portion of said inner wall of said coiled electrode assembly; and
said flexible electrically conductive member secured to an electrically conductive terminal at the exterior surface of said galvanic cell, said electrically conductive terminal being electrically insulated from said first terminal so that said electrically conductive terminal is adapted as the second terminal for said galvanic cell;
said cover comprising an inner cover and an outer cover and said flexible electrically conductive member being secured to said inner cover;
said flexible electrically conductive member being made by bending a strip of conductive material to form a substantially U-shaped portion having two spaced-apart legs, a portion of the upper end of one leg of said U-shaped portion being bent inwardly to form a neck portion and the extreme upper end of said one leg being bent to form a tab, a portion of the upper end of the second leg of said U-shaped portion being bent in a similar manner as said first leg but in the opposite direction to form a neck portion and a tab in said second leg, said neck portion of said first leg abutting said neck portion of said second leg with said tabs being in contact with said inner cover. - View Dependent Claims (21, 22, 23)
- said coiled electrode assembly comprising a first electrode, a second electrode superimposed on said first electrode and a separator disposed between said first electrode and said second electrode and over at least one of said first and second electrodes; and
Specification