Intrinsic safe battery having self test capability
Patent 4992340 Issued on February 12, 1991. Estimated Expiration Date: 
April 20, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 20, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of monitoring electrochemical cells Patent #: 4727006 InventorsAssigneeApplicationNo. 340828 filed on 04/20/1989US Classes:429/7, WITH NONBATTERY ELECTRICAL COMPONENT ELECTRICALLY CONNECTED WITHIN CELL CASING OTHER THAN TESTING OR INDICATING COMPONENTS429/61, WITH CONTROL MEANS RESPONSIVE TO BATTERY CONDITION SENSING MEANS429/90WITH MEASURING, TESTING, OR INDICATING MEANSExaminersPrimary: Kalafut, StephenAttorney, Agent or FirmForeign Patent References
International ClassH07M 002/00AbstractA battery having a self testing feature for its intrinsic safety circuitry is provided. The battery uses light emitting diodes to indicate the operation of safety circuit in the battery. The safety circuitry of the battery may be tested by providing a short across the battery terminals, if the associated circuitry is operational the light emitting diode will light. This feature will also indicate, when the load across the battery is shorted.Field of SearchWITH NONBATTERY ELECTRICAL COMPONENT ELECTRICALLY CONNECTED WITHIN CELL CASING OTHER THAN TESTING OR INDICATING COMPONENTSWITH CONTROL MEANS RESPONSIVE TO BATTERY CONDITION SENSING MEANS TERMINAL PROTECTOR OTHER THAN SEAL THROUGH CASING WITH MEASURING, TESTING, OR INDICATING MEANS Having electrical circuitry |
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