Alkaline metal oxide/metal hydride battery

US5738953A · kind A · utility

Assignee

• Varta Batterie Aktiengesellschaft · DE

Inventors

• Frank Lichtenberg · Adliswil, CH
• Uwe Kohler · Kelkheim, DE
• Klaus Kleinsorgen · Kelkheim, DE
• Andreas Folzer · Althofen, AT
• Alexander Bouvier · Krumpendorf, AT

Key dates

• Filing date: Apr 5, 1996
• Grant date: Apr 14, 1998
• Expiry date: Apr 5, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S420/90
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

As an active material for its negative electrode, a hydrogen storage alloy for a Ni/H battery has the composition EQU MmNi.sub.v Al.sub.w Mn.sub.x Co.sub.y M.sub.z, where Mm is a misch metal, M is Fe, Cu, or a mixture of Fe and Cu, and where PA1 0.1.ltoreq.z.ltoreq.0.4, PA1 0.2.ltoreq.y.ltoreq.0.4, PA1 0.3.ltoreq.w.ltoreq.0.5, PA1 0.2.ltoreq.x.ltoreq.0.4, and PA1 4.9.ltoreq.v+w+x+y+z.ltoreq.5.1. The partial substitution of Co by M, in conjunction with a special production method including the steps of atomizing the molten alloy, followed by heat-treatment and pulverization, leads to an alloy having a particularly high cycle lifetime and discharge capability.