Charging system and method for multicell storage batteries
Patent 4079303 Issued on March 14, 1978. Estimated Expiration Date: 
March 14, 1995. 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 14, 1995. 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 3280397 3305754 3454859 InventorAssigneeApplicationNo. 05/709352 filed on 07/28/1976US Classes:320/119, With individual charging of plural batteries or cells320/150, With thermal condition detection320/160Multi-rate charging (e.g., plural charge rates before a maintenance charge, etc.)ExaminersPrimary: Hickey, Robert J.Attorney, Agent or FirmInternational ClassH02J 7/00 (20060101)AbstractA battery-charging system includes a first charging circuit connected in series with a plurality of battery cells for controlled current charging. A second charging circuit applies a controlled voltage across each individual cell for equalization of the cells to the fully charged condition. This controlled voltage is determined at a level above the fully charged open-circuit voltage but at a sufficiently low level to prevent corrosion of cell components by electrochemical reaction. In this second circuit for cell equalization, a transformer primary receives closely regulated, square-wave voltage which is coupled to a plurality of equal secondary coil windings. Each secondary winding is connected in parallel to each cell of a series-connected pair of cells through half-wave rectifiers and a shared, intermediate conductor. | |
