Dual voltage battery system and electronic switch therefor

Patent · Tue Sep 12 04:00:00 EDT 1978

OSTI ID:6559723

Scheidler, R E

A pair of batteries of equal voltage rating are connected together in parallel through isolation diodes and in series through a first silicon controlled rectifier, the gate electrode of which is connected to the positive terminal of the first battery through a second silicon controlled rectifier and the emitter--collector switch circuit of a switching transistor. The gate electrode of the second silicon controlled rectifier is connected to the positive terminal through a capacitor and the transistor switch. The base--emitter switch actuator circuit of the switching transistor is connected across the first battery in a manner to maintain the transistor normally activated. The impulse generated from the instantaneous voltage drop across the first battery upon energization of an electric load connected to it is applied through the transistor switch to the gate electrode of the second silicon controlled rectifier, activating the latter to supply power to the gate electrode of the first silicon controlled rectifier, and thereby turn the latter on and connect the pair of batteries together in series. Conductors connected across the first silicon controlled rectifier are arranged for connection to the output terminals of a conventional battery charging source rated for charging one of the pair of batteries, the isolation diodes maintaining the batteries in parallel during charging. 1 figure.

• Assignee: TIC; EDB-79-030924; ERA-04-019322
• Patent Number(s): US 4114082
• OSTI ID: 6559723
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
BATTERY CHARGING
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTRONIC CIRCUITS
ENERGY STORAGE SYSTEMS
SWITCHING CIRCUITS