Cell balance circuit having rechargeable cells
Patent 5886502 Issued on March 23, 1999. Estimated Expiration Date: 
July 29, 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.
July 29, 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 References 5547775 Method for balancing power sources and structure therefor Patent #: 5646503 InventorAssigneeApplicationNo. 902180 filed on 07/29/1997US Classes:320/118, With discharge of cells or batteries320/116, SERIALLY CONNECTED BATTERIES OR CELLS320/136With battery or cell condition monitoring (e.g., for protection from overcharging, heating, etc.)ExaminersPrimary: Wong, Peter S.Assistant: Shin, K. Attorney, Agent or FirmInternational ClassH02J 007/00Foreign Application Priority Data1996-07-30 JPAbstractIn a cell balance circuit including a cell group in which two or more rechargeable cells are connected in series, a voltage converting circuit converts the voltages of the respective cells in the cell group into GND voltage standards on the basis of a ground voltage and produces two or more converted voltages. An output circuit determines a lowest voltage of the two or more converted voltages and produces the lowest voltage. Discharge circuits are provided for the respective cells for forming discharge loops to discharge the corresponding cells. Discharge control circuits are provided for the respective discharge circuits. Each discharge control circuit determines a difference between the converted voltage of the corresponding cell and the lowest voltage to control the discharge circuit to form the discharge loop when the difference exceeds a predetermined value.Field of SearchWith discharge of cells or batteriesSERIALLY CONNECTED BATTERIES OR CELLS Switchable cells (e.g., for voltage regulation, etc.) Bypassable battery cell With individual charging of plural batteries or cells DIVERSE CHARGING OR DISCHARGING RATES FOR PLURAL BATTERIES With battery or cell condition monitoring (e.g., for protection from overcharging, heating, etc.) Regulated discharging With battery or cell condition monitoring (e.g., for protection from overcharging, heating, etc.) | |
