Charging system for mild hybrid vehicle

摘要

A charging system for a hybrid vehicle which prevents a super capacitor from being reverse charged. In the illustrative charging system a DC-DC converter is connected to the inverter and configured to receive the DC electricity from the inverter and drop voltage. A battery is configured to receive the DC electricity from the DC-DC converter and to be charged by the DC electricity. Finally, a means for preventing reverse charging is mounted on a path between the super capacitor and the battery and is configured to prevent energy from flowing from the battery to the super capacitor.

主权项

1. A charging system for a hybrid electric vehicle, comprising:
an engine; an integrated starter and generator (ISG) connected to the engine and configured to generate AC electricity and to start the engine; an inverter configured to convert the AC electricity generated at the ISG into DC electricity, to convert the DC electricity into the AC electricity, and to deliver the converted AC electricity to the ISG; a super capacitor configured to receive the DC electricity from the inverter and be charged by the DC electricity; a DC-DC converter connected to the inverter and the super capacitor and configured to receive the DC electricity from the inverter or the super capacitor and drop voltage; a battery configured to receive the DC electricity from the DC-DC converter and to be charged by the DC electricity; and a relay mounted on an electric path between the super capacitor and the battery and configured to prevent energy from flowing from the battery to the super capacitor when a voltage of the battery is greater than or equal to that of the super capacitor.