Battery electrodes
AssigneeThe Gillette Company
InventorsFred J. Berkowitz, Bhupendra K. Patel, Maya Stevanovic
Life of this patent
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Abstract
A cathode includes a foil current collector including a coating containing iron disulfide on one side that covers less than 100% of the side.
Claims28
A battery comprising a cylindrical housing and, within the housing, an electrolyte, a cathode, an anode that does not include a current collector, and a separator between the cathode and the anode, the cathode, anode, and separator together being wound in a spiral configuration,
- wherein the cathode comprises a cathode current collector having a first side having a coating including iron disulfide and a second side having a coating including iron disulfide,
- wherein the cathode includes a core spiral having an inner surface including an uncoated portion of the first side of the cathode current collector and also having an outer surface including a coated portion of the second side of the cathode current collector opposite the uncoated portion of the first side of the cathode current collector,
- wherein the cathode includes an outer spiral having an outer surface including an uncoated portion of the second side of the cathode current collector and also having an inner surface including a coated portion of the first side of the cathode current collector opposite the uncoated portion of the second side of the cathode current collector, the uncoated portion of the second side of the cathode current collector having a length shorter than the outer spiral of the cathode,
- wherein the uncoated portion of the second side of the cathode current collector opposite the coated portion on the first side of the cathode current collector is longer than the uncoated portion of the first side of the cathode current collector opposite the coated portion on the second side of the cathode current collector, and
- wherein the anode includes an outer spiral and only a portion of the outer spiral of the cathode is outside of the outer spiral of the anode.
A battery comprising a cylindrical housing and, within the housing, an electrolyte, a cathode, an anode that does not include a current collector, and a separator between the cathode and the anode, the cathode, anode, and separator together being wound in a spiral configuration,
- wherein the cathode comprises a cathode current collector having a first side having a coating including iron disulfide and a second side having a coating including iron disulfide,
- wherein the cathode includes a core spiral having an inner surface including an uncoated portion of the first side of the cathode current collector and also having an outer surface including a coated portion of the second side of the cathode current collector opposite the uncoated portion of the first side of the cathode current collector, and
- wherein at least 50% of the inner surface of the core spiral is uncoated.
A battery comprising a cylindrical housing and, within the housing, an electrolyte, a cathode, an anode that does not include a current collector, and a separator between the cathode and the anode, the cathode, anode, and separator together being wound in a spiral configuration,
- wherein the cathode comprises a cathode current collector having a first side having a coating including iron disulfide and a second side having a coating including iron disulfide,
- wherein the cathode includes an outer spiral having an outer surface including an uncoated portion of the second side of the cathode current collector and also having an inner surface including a coated portion of the first side of the cathode current collector opposite the uncoated portion of the second side of the cathode current collector, the uncoated portion of the second side of the cathode current collector having a length shorter than the outer spiral of the cathode,
- wherein at least 50% of the outer surface of the outer spiral is uncoated, and
- wherein the anode includes an outer spiral and only a portion of the outer spiral of the cathode is outside of the outer spiral of the anode.
Dependencies are inferred from the claim text.