Method for Forming an Electrical Connection to a Conductive Fibre Electrode and Electrode So Formed
AssigneeArcactive Limited
InventorsJohn Abrahamson, Suzanne Furkert, Shane Christie, Yoon San Wong
Life of this patent
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Abstract
A method for forming an electrical connection to a microscale electrically conductive fibre material electrode element, such as a carbon fibre electrode element of a Pb-acid battery, comprises pressure impregnating into the fibre material an electrically conductive lug material, such as molten Pb metal, to surround and/or penetrate fibres and form an electrical connection to the fibre material and provide a lug for external connection of the electrode element. Other methods of forming a lug for external connection are also disclosed.
Claims20
A lead acid battery or cell including at least one electrode comprising as a current collector a conductive fibre material having an average interfibre spacing of less than 250 microns, comprising an electrically conductive lug material pressure impregnated into a lug zone part of the fibre material surrounding and/or penetrating the fibres and forming an electrical connection to the fibre material in said lug zone and providing a lug for external connection of the electrode element, and comprising and an active material in at least a part of the conductive fibre material other than in said lug zone, and wherein a surface to volume ratio of Pb particles in the active material is at least about 3 times greater than a surface to volume ratio of lug material in the lug zone.
A lead acid battery or cell including at least one electrode comprising as a current collector a conductive fibre material having an average interfibre spacing of less than 250 microns, comprising an electrically conductive lug material in a lug zone part of the conductive fibre material surrounding and/or penetrating the conductive fibre material and forming an electrical connection to the conductive fibre material in said lug zone part of the conductive fibre material and providing a lug for external connection of an electrode element, the electrically conductive lug material impregnating between at least 30% of the fibres in said lug zone part of the conductive fibre material, the electrode also comprising an active material in an active area comprising at least a part of the conductive fibre material other than in said lug zone, the active material impregnating the conductive fibre material in said active area, and wherein a surface to volume ratio of Pb particles in the active material is at least about 3 times greater than a surface to volume ratio of lug material in the lug zone.
Dependencies are inferred from the claim text.