Abstract: High voltage battery contactor welding prevention techniques for an electrified vehicle include, in response to a request to perform a high voltage connection procedure, utilizing a supervisory controller to monitor a voltage of the low voltage battery system to determine whether a low voltage battery system of the vehicle has a voltage level sufficient to open/hold the set of contactors during the high voltage connection procedure, when the low voltage battery system has sufficient voltage, commanding by the supervisory controller to a sub-controller to perform the high voltage connection procedure, and when the low voltage battery system does not have sufficient voltage, displaying a low voltage indicator for a user to recharge the low voltage battery system before the high voltage connection procedure can occur.

Abstract: A hybrid vehicle having an engine, a high voltage battery, a low voltage battery and at least one charge enabling component and system for operating the same includes enabling charging of the low voltage battery from a high voltage battery through a DC-DC converter, charging the low voltage battery with the high voltage battery and the at least one charge enabling component comprising at least the DC-DC converter and detecting a fault in the at least one charge enabling component. Based on the fault, the system performs enabling charging of the low voltage battery from a starter generator based on the fault and disabling charging of the low voltage battery from the high voltage battery using the DC-DC converter.

Abstract: Electrified vehicle battery overcharge protection techniques monitor an intelligent battery sensor (IBS) current signal via a controller area network communication (CAN-C) bus and an output current of an auxiliary power module (APM) when the IBS current signal is unavailable. A controller then intelligently adjusts charging of the battery system to be battery current-based, battery temperature-based, or at predetermined constant value, based on a determined validity of the IBS current signal, the measured battery system current, and an awake/asleep status and responsiveness of the CAN-C bus.

Abstract: A medium-deep non-interference geothermal heating system based on loose siltstone geology includes a water return pipe and a water inlet pipe. The system further includes a differential pressure overflow pipe, a gauge, a differential pressure controller, a first high area water return pipe, a first water return pipe, a third water return pipe, a bypass pipe, a high area water supply pipe, a second high area water return pipe, a geothermal well water return pipe, a geothermal well water supply pipe, a heat pump unit, a second water return pipe, a water supply pipe, a geothermal well water pump, a first geothermal well water supply pipe, a first geothermal well water return pipe, a second geothermal well water return pipe, a second geothermal well water supply pipe, a geothermal wellhead device, and a geothermal well that are combined for use.

Abstract: A medium-deep non-interference geothermal heating system based on loose siltstone geology includes a water return pipe and a water inlet pipe. The system further includes a differential pressure overflow pipe, a gauge, a differential pressure controller, a first high area water return pipe, a first water return pipe, a third water return pipe, a bypass pipe, a high area water supply pipe, a second high area water return pipe, a geothermal well water return pipe, a geothermal well water supply pipe, a heat pump unit, a second water return pipe, a water supply pipe, a geothermal well water pump, a first geothermal well water supply pipe, a first geothermal well water return pipe, a second geothermal well water return pipe, a second geothermal well water supply pipe, a geothermal wellhead device, and a geothermal well that are combined for use.