Fumio Kaneda

US Patent:

60406828, Mar 21, 2000

Filed:

Feb 2, 1999

Appl. No.:

9/243271

Inventors:

Fumio Kaneda - Camarillo CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H02J 700

US Classification:

320136

Abstract:

A circuit for disconnecting a battery from a battery powered load whenever he battery's output voltage drops below a specified battery cell voltage. The circuit includes a relay having a coil and a normally open contact which connects the battery to its load when the coil is energized. When the battery's output voltage drops below the specified battery cell voltage, which is about 1. 8 volts per cell, the relay coil will de-energize disconnecting the battery from the load. A battery charger continuously charges the battery to maintain its output voltage. The relay coil is energized closing the relay contact when the battery charges to a predetermined charging voltage which is approximately 2. 2 VDC per cell. Closing the relay contact again connects the battery to its load.