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United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Balancing and Control System for Operation of Multiple Cells and Packs in Large Energy Storage Arrays
An apparatus includes a battery state module that determines a battery state of each of a plurality of battery cells forming a battery unit. A battery state includes a health of the battery cell. A battery state of a battery cell differs from a battery state of other battery cells of the battery unit. Each battery cell is connected to a shared bus through a bypass converter that provides power from the battery cell to the shared bus. A charge/discharge modification module determines, based on battery state, an amount to vary a charging characteristic for each battery cell compared to a reference charging characteristic. Each charging characteristic varies as a function of a reference state. A charge/discharge module adjusts charging/discharging of a battery cell of the battery unit based on the charging characteristic of the battery cell.
Zane, Regan A. (North Logan, UT), Evzelman, Michael (Logan, UT), Costinett, Daniel (Knoxville, TN), Maksimovic, Dragan (Boulder, CO), Anderson, Richard Dyche (Plymouth, MI), Smith, Kandler (Golden, CO), Trimboli, Michael Scott (Colorado Springs, CO), Plett, Gregory L. (Colorado Springs, CO)
15/ 224,123
July 29, 2016
GOVERNMENT RIGHTS [0002] This invention was made with government support. The government has certain rights in the invention.