An electrical power supply device configured to interface with a start-stop controller within a vehicle includes a DC-DC power convertor receiving an input voltage and producing a first output voltage or a second output voltage that is less than the first output voltage and a device controller in communication with the DC-DC power convertor. The device controller has one or more processors and memory. The memory includes instructions which causes the device controller to command the DC-DC power convertor to output the first output voltage when the device controller receives a run signal from the start-stop controller or detects that the input voltage is above a voltage threshold or output the second output voltage when the device controller receives a stop signal from the start-stop controller or detects that the input voltage is below a voltage threshold. A method of operating the electrical power supply device is also presented.

A vehicle includes first loads, a power source, and a processor coupled to the power source. Each of the first loads is configured to generate a fault signal indicative of an occurrence of an action performed by said first load to mitigate a voltage transient event. The processor is configured to, in response to a second different load being electrically coupled to the power source: control a voltage available within the power source based on calibration parameters; and in response to receiving the fault signal, adjust at least one of the calibration parameters.

Methods and apparatus are disclosed for vehicle charge control for protection against cold crank failure. An example vehicle includes a battery and a body control module. The body control module is to obtain state of charge information of the battery, obtain temperature information, and estimate a next crank time based on the state of charge information and the temperature information.

Systems and methods for operating an internal combustion engine that includes an oxygen sensor are described. In one example, a voltage that is applied to a heating element of an oxygen sensor is integrated to determine a resistance of the heating element. The resistance of the heating element is the basis for adjusting voltage applied to the heating element during subsequent engine starts.

A vehicle includes an auxiliary battery configured to power an electrical. accessory, a traction battery configured to provide power to propel the vehicle, a winch including a motor and cable, and a controller configured to, responsive to a requested torque of the motor being less than a threshold, initiate transfer of power to the motor from the auxiliary battery, and initiate transfer of power to the motor from the traction battery otherwise.

A management device includes a manager configured to manage power stored in a secondary battery provided to a user for stationary use and execute a power exchange business, the power exchange business being performed by connecting the secondary battery to a power network, and a deriver configured to derive return information for returning part of a profit obtained through the power exchange business to the user.

A power management system including a power converter circuit, a supercapacitor storage unit, and a load-sharing controller in communication with the power converter circuit and the supercapacitor storage unit; wherein, in response to executing the program instructions, the load-sharing controller is configured to receive data including the power demand from the external device, receive data including the raw power from the power converter circuit, receive data including a capacity from the supercapacitor storage unit, and direct power to the external device based on the received data.

An automotive generator control method includes inputting a current vehicle speed, an actual battery level, an actual battery temperature and an engine operating efficiency (S11); calculating an optimal battery level by using a preset first mapping table, on a basis of the actual battery temperature and the current vehicle speed; taking a difference between the actual battery level and the optimal battery level as a target power-generation difference (S12); calculating a target power-generation voltage by using a preset second mapping table, on a basis of the target power-generation difference and the engine operating efficiency (S13); and outputting the target power-generation voltage (S14). The automotive generator control method and control device can precisely control a power-generation voltage of a generator according to a current engine/vehicle working condition and a battery working condition, so as to achieve primary energy recovery of the generator in a highly efficient manner.

The present invention reduces the effort involved in an operation for cancelling a current cutoff device while inhibiting a capacity decline during parking. Provided is a battery device 20 that is to be mounted on a vehicle, and that is provided with: an assembled battery 30 that supplies electric power to loads 10 including an engine starting device 10A; a current cutoff device 45 that cuts off an electric current to the loads 10 from the assembled battery 30; and a control unit 70, wherein upon detecting a parked state of the vehicle, the control unit 70 operates the current breaker device 45 so as to execute a current cutoff process for cutting off the current flowing from the assembled battery 30 to the loads 10, and following the execution of the current cutoff process, if a prior action to be performed on the vehicle by a user before starting driving is detected, the control unit 70 cancels the cutoff of current by cancelling the operation of the current breaker device 45.

A vehicle includes a starter motor having a dedicated power source, an electric machine, and a controller configured to, responsive to a command for the motor to start an engine, open a switch to isolate the motor and source from a network electrically connected with the machine, and responsive to voltages on both sides of the switch falling within a predetermined range, close the switch to charge the source.