US 11,851,198 B2
Electrically propelled aircraft with partially rated converter
Chandana Jayampathi Gajanayake, Singapore (SG); and David Russell Trawick, Indianapolis, IN (US)
Assigned to Rolls-Royce Singapore Pte. Ltd., Singapore (SG); and Rolls-Royce Corporation, Indianapolis, IN (US)
Filed by Rolls-Royce Singapore Pte. Ltd., Singapore (SG); and Rolls-Royce Corporation, Indianapolis, IN (US)
Filed on Apr. 27, 2022, as Appl. No. 17/660,905.
Prior Publication US 2023/0348079 A1, Nov. 2, 2023
Int. Cl. B64D 27/24 (2006.01); H02J 7/34 (2006.01)
CPC B64D 27/24 (2013.01) [H02J 7/342 (2020.01); B64D 2221/00 (2013.01); H02J 2310/44 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
an electrical energy storage system (ESS) comprising:
an upper node and a lower node;
a first set of battery modules that are connected in series;
a second set of battery modules that are connected in series; and
a DC/DC converter electrically in series with the first set of battery modules between the upper node and the lower node, wherein the DC/DC converter sources electrical energy from the second set of battery modules; and
a controller configured to adjust an output voltage of the DC/DC converter such that a voltage across the upper node and the lower node is maintained at a specified output voltage level.