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US 6,117,583 AGranted
Lead battery
AssigneeAdvanced Power Devices, Inc.
InventorsOve Nilsson, Erik Sundberg
Life of this patent
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AssigneeAdvanced Power Devices, Inc.
InventorsOve Nilsson, Erik Sundberg
Estimating the term…
The invention concerns a lead-acid battery having all the surfaces of all the electrodes under high pressure and their circumferences kept unchanged by support from mechanically rigid cell walls such that only the thickness of the electrodes is allowed to expand under strong resilient load during the discharge and return during charge. The pressure is 0.49-10.sup.5 -9.81-10.sup.5 Pa (0.5-10 kp/cm.sup.2), and may be obtained by separators or by springs applied to the outer sides of the cell container and may be changed for increased or decreased capacity. The construction of the tubular battery design, prevents material losses due to sludging and a long working life is obtained, since also a totally corroded lead conductor under high pressure may function as a current conductor. The rigid outer containers also allow high liquid pressure and thus a high oxygen solubility and oxygen recombination for sealed cells.
A lead acid battery comprising a container having walls, at least one positive electrode and one negative plate-shaped electrode, separators and sulphuric acid, each of said electrodes having a projected area, wherein the projected area of at least one of the electrodes is maintained in a first direction by the walls of the container, said container able to counteract pressure from the electrodes, and means for restricting growth of the electrodes during cycling in a direction perpendicular to said first direction.
A lead-sulphuric acid battery having at least one cell, each cell having a volume having at least one positive electrode and one negative plate-shaped electrode separated by separators and contained within a container which defines radial directions and an axial direction, wherein said electrodes, separators and sulphuric acid fill the volume of each cell, and wherein the circumference of the electrodes contacts walls of the container, said walls having constancy of volume and surfaces of said electrodes arranged to be compressed in the axial direction by a pressure of about 0.49.multidot.10.sup.5 -about 9.81.multidot.10.sup.5 Pa.
A lead-acid battery with one or more cells each having an interior volume having at least one positive and one negative electrode, separators and sulphuric acid, and a tubular container defining an axial direction and radial directions, wherein
A lead-acid battery having a plurality of cells wherein each cell comprises at least one positive electrode and one negative, plate-shaped electrode, at least two lead bars, at least one separator, an electrolyte comprising sulphuric acid, and a container, wherein
Dependencies are inferred from the claim text.