Charge balancing system
Patent 6518725 Issued on February 11, 2003. Estimated Expiration Date: 
July 11, 2022. 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 11, 2022. 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 ReferencesSwitched capacitor system for automatic battery equalization Voltage balancer device for combination battery Battery charger for charging a stack of multiple lithium ion battery cells Patent #: 6121751 InventorAssigneeApplicationNo. 181851 filed on 07/11/2002US Classes:320/116, SERIALLY CONNECTED BATTERIES OR CELLS320/118With discharge of cells or batteriesExaminersPrimary: Sherry, Michael J.Assistant: Luk, Lawrence Attorney, Agent or FirmForeign Patent References
International ClassH02J 007/00AbstractThe problem of battery failure due to failure of one cell in a rechargeable battery, and the related problem of inefficient use of a battery over its dynamic range due to differences between the performance of cells in a battery, are addresses by providing one or more capacitors selectively coupled to the various cells of the battery. The selective and repetitive coupling of capacitors to the cells permits balancing of charge among the cells. This minimizes the risk that any one cell would suffer catastrophic failure due to being fully charged or discharged prior to the other cells in the battery. This also permits making use of the battery over nearly all of its dynamic range. In this way, battery life is maximized. | |
