Abstract: A system and method are provided for preconditioning a rechargeable energy system (RESS) for a vehicle. The method includes monitoring one or more rechargeable energy storage system parameters; adjusting a rechargeable energy storage system precondition window based on one or more of the monitored rechargeable energy storage system parameters; and prompting for or activating thermal preconditioning of the rechargeable energy storage system at least partially depending on the adjusted rechargeable energy storage system precondition window.

Abstract: A system and method are provided for preconditioning a rechargeable energy system (RESS) for a vehicle. The method includes monitoring one or more rechargeable energy storage system parameters; adjusting a rechargeable energy storage system precondition window based on one or more of the monitored rechargeable energy storage system parameters; and prompting for or activating thermal preconditioning of the rechargeable energy storage system at least partially depending on the adjusted rechargeable energy storage system precondition window.

Abstract: An electrical system for use with an AC power supply having multiple phase voltages, e.g., three phase voltages, may include a high-voltage battery pack or other high-voltage DC device, a 12 VDC battery or other auxiliary-voltage DC device providing auxiliary power to the electrical system, multiple AC-DC converters, and a controller. The AC-DC converters each provide a DC output voltage to the high-voltage DC device, and are operable for converting a respective one of the phase voltages from the AC power supply into the DC output voltage. The controller selectively disables the AC-DC converters in response to a detected predetermined operating condition to thereby reduce consumption of the auxiliary power within the electrical system. A vehicle may include a high-voltage DC battery pack, an auxiliary-voltage DC battery providing auxiliary power, an onboard charging module, a charging port, an auxiliary power module, an electric machine, and a controller.

Abstract: An electrical system for use with an AC power supply having multiple phase voltages, e.g., three phase voltages, may include a high-voltage battery pack or other high-voltage DC device, a 12 VDC battery or other auxiliary-voltage DC device providing auxiliary power to the electrical system, multiple AC-DC converters, and a controller. The AC-DC converters each provide a DC output voltage to the high-voltage DC device, and are operable for converting a respective one of the phase voltages from the AC power supply into the DC output voltage. The controller selectively disables the AC-DC converters in response to a detected predetermined operating condition to thereby reduce consumption of the auxiliary power within the electrical system. A vehicle may include a high-voltage DC battery pack, an auxiliary-voltage DC battery providing auxiliary power, an onboard charging module, a charging port, an auxiliary power module, an electric machine, and a controller.

Abstract: A high voltage battery charger converts an AC input into a DC output. A controller is configured to calculate an efficiency of the high voltage battery charger, compare the calculated efficiency to a first threshold value, and signal a fault in response to the calculated efficiency being less than the first efficiency threshold value. Despite the fault, the battery charger keeps charging if the calculated efficiency and/or an average efficiency is not less than a second efficiency threshold value.