Power supply unit for automotive vehicle
Patent 5982050 Issued on November 9, 1999. Estimated Expiration Date: 
March 12, 2017. 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.
March 12, 2017. 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 ReferencesFault indicator for motor vehicle battery charging systems Electric battery powered vehicle Fault indicating circuit for an automotive alternator battery charging system Controller for AC generator in vehicles 12 Volt battery charger circuit Patent #: 5039931 InventorAssigneeApplicationNo. 820386 filed on 03/12/1997US Classes:307/10.7, Battery protection320/104, Vehicle battery charging320/107, CELL OR BATTERY CHARGER STRUCTURE320/116, SERIALLY CONNECTED BATTERIES OR CELLS340/455, Battery charging system condition340/636.1, Battery340/636.15By voltageExaminersPrimary: Paladini, Albert W.Attorney, Agent or FirmInternational ClassH02J 007/24Foreign Application Priority Data1996-03-14 JPAbstractA Zener diode 16 is connected to each of single cells 10 of an electric double layer capacitor in parallel, and a resistor 18 is connected to each of the Zener diode 16 in series. Thus, in a case where a single cell 10 is excessively charged, when the bias voltage of the single cell 10 is equal to or higher than the Zener voltage, a discharge current flows through the Zener diode 16 connected to the single cell 10, so that the voltage decreases to the Zener voltage. Thus, it is possible to prevent the electric double layer capacitor from being excessively charged due to the dispersions in electrostatic capacity and internal resistance, and to stably accumulate electricity for a long time. | |
