Battery charging and testing circuit

Patent · Tue Jan 17 04:00:00 EST 1984

OSTI ID:6692302

Wicnienski, M F; Charles, D E

A constant current battery charging circuit is provided by which the battery receives a full charge until the battery voltage reaches a threshold. When the battery voltage is above the threshold, the battery receives a trickle charge. The actual battery voltage is compared with a reference voltage to determine whether the full charge circuit should be in operation. Hysteresis is provided for preventing a rapid on/off operation around the threshold. The reference voltage is compensated for temperature variations. The hysteresis system and temperature compensation system are independent of each other. A separate test circuit is provided for testing the battery voltage. During testing of the battery, the full charge circuit is inoperative.

• Assignee: Baxter Travenol Laboratories, Inc.
• Patent Number(s): US 4426612
• OSTI ID: 6692302
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
AMPLIFIERS
BATTERY CHARGERS
BATTERY CHARGING
CHARGE STATE
DESIGN
ELECTRIC BATTERIES
ELECTRIC MEASURING INSTRUMENTS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
HYSTERESIS
MEASURING INSTRUMENTS
OPERATION
OPERATIONAL AMPLIFIERS
TEMPERATURE MEASUREMENT
TESTING
VOLTAGE REGULATORS
VOLTMETERS