DUAL VOLTAGE CHARGING SYSTEM WITH AN INTEGRATED ACTIVE FILTER AUXILIARY POWER MODULE

摘要

Various embodiments are described herein for a dual-voltage charging system for electrified vehicles. In one example embodiment, the dual-voltage charging system comprises an integrated active filter auxiliary power module (AFAPM) that applies the integrated AFAPM as an active power filter (APF) to compensate the low frequency harmonics in the high voltage (HV) battery charger when the HV battery is charging, and applies the integrated AFAPM as a low voltage (LV) battery charger auxiliary power module (APM) when the HV battery stops charging and starts to charge the LV battery.

主权项

1. A dual-voltage charging system comprising:
an AC power source for providing power; a charger coupled to the AC power source via a first switch, the first switch being operable between a connect mode to connect the charger to the AC power source and a disconnect mode to disconnect the charger from the AC power source; a high voltage battery coupled to the charger, wherein when the first switch is in the connect mode and the charger is connected to the AC power source, the dual-voltage charging system operates in filtering mode where the high voltage battery is charged using the AC power source; and an active filter auxiliary power module coupled to the high voltage battery and a low voltage battery, wherein when the first switch is in the disconnect mode and the charger is disconnected from the AC power source, the dual-voltage charging system operates in a charging mode where the high voltage battery charges the low voltage battery via the active filter auxiliary power module.