Spirally wound electrochemical cells

Patent · Tue Nov 17 04:00:00 EST 1987

OSTI ID:5898997

Mc Veigh, Jr, J B; Reise, T F; Taylor, A H

A spirally wound electrochemical cell having improved abuse resistance is described comprising a container having a cathode, an anode consisting essentially of an anode metal comprising an alkali or alkaline earth metal, a separator, and a fluid electrolyte all in operative association with each other. Each of the cathode, anode and separator have lengths substantially greater than their respective widths; and the anode, cathode and separator are spirally wound with the separator being positioned to maintain the anode and the cathode out of direct contact with each other. The anode is comprised of first and second sections integral with each other but subject to different rates of utilization during discharge of the cell with the first section of anode being a minor part of the anode and being substantially completely discharged and depleted, during discharge of the cell, prior to completion of discharge and depletion of the second section of anode, with the second section comprising a major portion of the anode. The cell further comprises an anode tab located on the second section of the anode, whereby the discharge and depletion of the first section does not prematurely end the life of the cell.

• Assignee: Duracell Inc., Bethel, CT
• Patent Number(s): US 4707421
• OSTI ID: 5898997
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250901* -- Energy Storage-- Batteries-- Design & Development
250903 -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
ALKALI METALS
ALKALINE EARTH METALS
ANODES
BATTERY SEPARATORS
CATHODES
CONFIGURATION
DESIGN
ELECTRIC BATTERIES
ELECTRIC COILS
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROLYTES
ELEMENTS
EQUIPMENT
METALS
SPIRAL CONFIGURATION