The present invention provides split-rail vehicle power architecture. A vehicle includes a chassis, an engine, a transmission, an electric machine operable to selectively power the engine, and an electrical system. The electrical system includes a DC propulsion energy storage system (P-ESS) and a DC auxiliary ESS (A-ESS). Positive terminals of the two ESSs are electrically connected. The A-ESS negative terminal connects to the chassis as an electrical ground. The P-ESS negative terminal is not connected to ground, such that voltage levels of the P-ESS negative terminal float with respect to ground. A power inverter module (PIM) is connected to the MGU via an AC propulsion bus, and to the positive and negative terminals of the P-ESS. Positive input terminal and output terminals of a DC-DC converter system are tied together and connected to positive terminals of the P-ESS and A-ESS. A negative input terminal of the DC-DC converter system is electrically connected to the negative terminal of the P-ESS.
Split-rail vehicle power architecture
2015-09-16
Patent
Elektronische Ressource
Englisch
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES |