Method and apparatus for balancing multi-cell lithium battery systems
Patent 7126312 Issued on October 24, 2006. Estimated Expiration Date: 
July 28, 2024. 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 28, 2024. 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 ReferencesBattery system and electric motor vehicle using the battery system with charge equalizing features Equalizer system and method for series connected energy storing devices Patent #: 5952815 InventorAssigneeApplicationNo. 10900502 filed on 07/28/2004US Classes:320/157, Detection of current or voltage amplitude320/116, SERIALLY CONNECTED BATTERIES OR CELLS320/118, With discharge of cells or batteries180/65.2, Combined with nonelectric drive means320/119, With individual charging of plural batteries or cells320/132With state-of-charge detectionExaminersPrimary: Han, JessicaAssistant: Piggush, Aaron Attorney, Agent or FirmInternational ClassH02J 7/04AbstractA method and apparatus of the present invention are designed to equalize cell-to-cell imbalances in a multi-cell lithium battery system. A time-to-balance parameter is calculated for each cell at the beginning of charge, and balancing occurs for each cell having a positive time-to-balance at the beginning of charge. Alternatively, the time-to-balance parameter is calculated during operation of the battery system and equalization of the cells occur in-sit based on the time-to-balance values.Field of SearchSERIALLY CONNECTED BATTERIES OR CELLSBATTERY OR CELL CHARGING Time control Detection of current or voltage amplitude With discharge of cells or batteries With individual charging of plural batteries or cells Switchable cells (e.g., for voltage regulation, etc.) Bypassable battery cell Balancing (e.g., known/unknown voltage comparison, bridge, rebalancing) | |
