Performance of the Sony Lithium-Ion Rechargeable Battery

Abstract

Sony lithium-ion cells type 20500 were tested and evaluated at different temperatures, discharge rates from C/2 to 3C, and with different charge voltage cutoffs. The capacity was typical 0.8 Ah at the C/2 rate at 25 deg C when charged to 4.1-volt cutoff. An energy density of 70 Wh/kg and 400 or more cycles was demonstrated. Charging to 4.25 volts and higher cutoffs was tested without a safety problem. The Sony charger provided a constant potential charge at 8.2 volts (4.1 volts/cell). It replaces 90% of capacity within one hour and it shut off the charging after 2-1/2 hours. Lithium-ion batteries, Rechargeable batteries, Electrodes, Electrolytes, Organic, Charging.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1993
Accession Number
ADA277076

Entities

People

  • George Au
  • Martin Sulkes

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Capacitors
  • Cycles
  • Electrodes
  • Energy
  • High Temperature
  • High Voltage
  • Information Processing
  • Jet Propulsion
  • Lithium Ion Batteries
  • Materials
  • Military Research
  • Mobile Phones
  • Plastic Explosives
  • Storage
  • Storage Batteries
  • Test Equipment

Fields of Study

  • Materials science

Readers

  • Battery Technology and Engineering