Patent ID: 8928259
Filing Date: 2015-01-06
Classification: B60L,B60Y,H02P,H05K,Y02T,Y10T

Abstract:
1. A propulsion system comprising: an electric drive; a direct current (DC) link electrically coupled to the electric drive, the DC link having a first bus and a second bus; a first DC-DC converter coupled to the DC link; a first energy storage device (ESD) electrically coupled to the first DC-DC converter; a second DC-DC converter coupled to the DC link and to the first DC-DC converter; a second energy storage device electrically coupled to the second DC-DC converter; and a controller coupled to the first and second DC-DC converters and configured to control a transfer of energy between the first ESD and the DC link via the first and second DC-DC converters; and wherein the controller is further configured to control a transfer of energy between the second ESD and the DC link via the first and second DC-DC converters; and wherein the first DC-DC converter is directly coupled to the first bus of the DC link and coupled to the second bus of the DC link through the second DC-DC converter absent a connection that bypasses the second DC-DC converter.