Battery system and electric motor vehicle using the battery system with charge equalizing features
Patent 5905360 Issued on May 18, 1999. Estimated Expiration Date: 
August 21, 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.
August 21, 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 ReferencesCharging generator control for vehicles Distributed multi-module battery equalization Method for determining the charge state of a battery, in particular a vehicle starter battery Patent #: 5598088 InventorAssigneeApplicationNo. 915595 filed on 08/21/1997US Classes:320/118, With discharge of cells or batteries320/121Switchable cells (e.g., for voltage regulation, etc.)ExaminersPrimary: Tso, Edward H.Attorney, Agent or FirmForeign Patent References
International ClassH01M 10//46Foreign Application Priority Data1996-08-22 JPAbstractIn an electric motor vehicle, a bidirectional boosting converter is placed in a battery circuit. A main contactor is turned off to disconnect one battery block from another and contactors are turned on to connect a first battery block to one terminal pair of the bidirectional boosting converter and to connect a second battery block to another terminal pair of the bidirectional boosting converter. A refreshing discharge of the first battery block or an equalizing charge of the second battery block is performed by boosting output of the first battery block and using this output to charge the second battery block. The boosting direction of the bidirectional boosting converter is changed to perform an equalizing charge of the first battery block or a refreshing discharge of the second battery block. The boosting direction is changed again to balance battery block SOCs, these by eliminating need for a charging device for equalizing charge or a discharging device for refreshing discharge.Field of SearchONE CELL OR BATTERY CHARGES ANOTHERVehicle battery charging SERIALLY CONNECTED BATTERIES OR CELLS With discharge of cells or batteries Switchable cells (e.g., for voltage regulation, etc.) Bypassable battery cell With battery or cell condition monitoring (e.g., for protection from overcharging, heating, etc.) With battery or cell condition monitoring (e.g., for protection from overcharging, heating, etc.) With detection of current or voltage amplitude | |
