Battery charger

Patent · Tue Aug 19 04:00:00 EDT 1986

OSTI ID:5287734

Vreeland, S W

An apparatus is described for charging batteries comprising, in combination: a main power section including a transformer-input EMI filter section, a rectifier filter section, and a power switching section, and having a battery output line and a battery return line; a control section including a low voltage regulator providing low voltage power to the control section from the main power section, a pulse width modulator and output driver section providing driver signals to the power switching section, a constant current control circuit for maintaining a constant current output of the apparatus operably connected to the pulse width modulator, a constant voltage control section operably connected to sense a portion of the output voltage and to supply a control signal to the pulse width modulator, and a battery over-temperature control operably connected to sense battery temperature and to provide a control signal to the pulse width modulator, and a timer section operably connected to provide temporal control over the apparatus, subject to the charging current used, the output voltage, and the battery temperature as monitored by the control section, and providing to the control section an end of charge indication.

• Assignee: Secretary of the Navy, Washington, DC
• Patent Number(s): US 4607208
• OSTI ID: 5287734
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
BATTERY CHARGERS
BATTERY CHARGING
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
CURRENTS
DESIGN
ELECTRIC BATTERIES
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
ELECTRONIC CIRCUITS
EQUIPMENT
OPERATION
PULSES
RECTIFIERS
SIGNALS
SWITCHING CIRCUITS
TEMPERATURE CONTROL
THERMOSTATS
TIMING CIRCUITS
TRANSFORMERS
VOLTAGE REGULATORS