Battery condition indicator and on-off relay circuit
Patent
·
OSTI ID:5763527
In a battery-operated appliance, a battery condition indicating system is described consisting of: (a) an electronic relay circuit having a power input terminal connected to a battery, a power output terminal connected to a power input terminal of the appliance, and a control input terminal, (b) a test interval timing circuit having a control input terminal connected to one of a pair of on-off contacts, a control output terminal connected to the control input terminal of the electronic relay circuit, and a timing output terminal supplying a test interval pulse signal, whereby actuating the on-off contacts for turn-on causes the electronic relay circuit to connect the battery to the appliance, and actuating the on-off contacts for turn-off causes the electronic relay circuit to disconnect the appliance from the battery, after a delay timed by the duration of the test interval pulse signal; (c) comparator means for comparing the voltage of the battery with a fixed reference voltage, the comparator means supplying an output signal, enabled during the duration of the test interval pulse signal, the comparator output signal signifying the comparison result; and (d) indicator means driven by and responsive to the output signal of the comparator means, whereby the conditions of the battery is communicated to a user during the duration of the test interval pulse signal, from indication of the comparison result by the indicator means.
- Assignee:
- NOV; EDB-86-094618
- Patent Number(s):
- US 4575680
- OSTI ID:
- 5763527
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
COMPARATOR CIRCUITS
CONTROL SYSTEMS
ELECTRIC BATTERIES
ELECTRIC CONTACTS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
ELECTRONIC CIRCUITS
EQUIPMENT
PERFORMANCE TESTING
PULSES
RELAYS
SIGNALS
SWITCHING CIRCUITS
TESTING
TIME MEASUREMENT
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
COMPARATOR CIRCUITS
CONTROL SYSTEMS
ELECTRIC BATTERIES
ELECTRIC CONTACTS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
ELECTRONIC CIRCUITS
EQUIPMENT
PERFORMANCE TESTING
PULSES
RELAYS
SIGNALS
SWITCHING CIRCUITS
TESTING
TIME MEASUREMENT