The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 24, 1996
Filed:
Jan. 05, 1996
Litronik Batterietechnologie GmbH & Co., Pirna, DE;
Abstract
A sealed galvanic cell which has high power and energy densities, a low self discharge, and an open circuit voltage which is related to state of discharge, and which is useful for supplying electrical power to an implantable device, such as a defibrillator and a nerve stimulator, with a large current consumption, and method of making same. The galvanic cell includes a casing; a cathode unit having at least one electrode composed of a mixture of at least one metal oxide and at least one lead compound; an anode unit having at least one electrode comprised of an alkali metal; and an organic electrolyte comprised of a mixture of (a) ethylene- and/or propylene carbonate, (b), 2-dimethoxyethane, and (c) a conducting salt. The mixture of the cathode unit is one of (a) a mixture of CrO.sub.x (x=2.5 to 2.7) and at least one lead compound from among PbCrO.sub.4, PbMoO.sub.4 and PbO, (b) a mixture of CrO.sub.x (x=2.5 to 2.7), MnO.sub.2, and at least one lead compound from among PbCrO.sub.4, PbMoO.sub.4 and PbO, or (c) a mixture of MnO.sub.2 and PbO. The at least one lead compound is present in an amount of, for example, 3 to 15 mol %, so that the mean slope of the open circuit voltage after the time just before reaching the end of discharge at which at least 10 % of capacity remains is greater than the mean slope prior thereto.