A method for operating a vehicle that includes a DC/DC converter is described. In one example, the method includes adjusting an output voltage of the DC/DC converter after the DC/DC converter is used to crank an engine. The output voltage of the DC/DC converter may be adjusted responsive to a state of charge of an ultra-capacitor.

A power supply charging system having first and second alternating power cells, a motor driven generator adapted to operably switch between providing power between the first and second alternating power cells, a third power cell which supplies power to the motor driven generator, and a control system having a power cell managing module and a charge control module. The power cell module is adapted to alternate the motor driven generator to operably switch between providing power to the first and second alternating power cells. The charge control module is adapted to detect the occurrence of a pre-determined power supply condition to activate the motor driven generator to provide power to the first or second alternating power cells. The power supply charging system may find particular use in generating a direct current, converting the direct current to an alternating current, and providing a continuous alternating current to a facility or equipment.

An ECU performs processing including obtaining a current in a battery assembly, calculating a current in each battery, calculating an SOC of each battery, calculating an OCV of each battery, calculating ΔOCV, calculating an average value Ave of ΔOCVs, carrying out current restriction control when the average value Ave exceeds a first range and exceeds a second range, providing a warning signal when the average value Ave does not exceed the second range, and carrying out normal current control when the average value Ave does not exceed the first range.

Systems and methods for controlling power flow to and from an energy storage system are provided. One energy storage system includes an energy storage device and a bidirectional inverter configured to control a flow of power into or out of the energy storage device via a plurality of phases. The energy storage system further includes a controller configured to control the bidirectional inverter based on a load condition on one or more phases. The controller is configured to control the bidirectional inverter to store power generated by a generator set in the energy storage device and transmit power from the energy storage device to a load driven by the generator set in response to detecting a load imbalance between the phases.

A method for managing energy to a transport climate control system from a vehicle electrical system is provided. The vehicle electrical system includes a vehicle power network and an auxiliary power network connected to a transport climate control load network via a DC regulated bus. The method includes monitoring a vehicle voltage of the vehicle power network and determining whether the vehicle power network requires holdover assistance based on the vehicle voltage. Also, the method includes the bus sending vehicle power energy generated by the vehicle power network to the transport climate control load network without assistance of the auxiliary power network when the controller determines that the vehicle power network has sufficient power capacity available, and the bus sending the vehicle power energy and auxiliary power energy stored by the auxiliary power network to the transport climate control load network when the controller determines that the vehicle power network requires holdover assistance.

A system includes a source configured to provide power to a medium-voltage direct current (MVDC) bus. The system also includes a plurality of rotating electrical machines configured to receive the power from the MVDC bus. The rotating electrical machines are arranged in a cascaded configuration. One of the rotating electrical machines is configured to act as a slave to another of the rotating electrical machines. Each rotating electrical machine is mechanically connected to an inertial energy storage. The system further includes a plurality of isolated battery or ultra-capacitor subsystems electrically connected to each rotating electrical machine. The battery or ultra-capacitor subsystems are configured to receive electrical energy from and provide electrical energy to each rotating electrical machine and the connected inertial energy storage.

The disclosure provides a system for output ratio configuration of start-up battery and rapid energy storage module starts a start-up motor in a start-up mode, including a start-up battery having a voltage and a higher voltage rapid energy storage module having a voltage. The higher voltage rapid energy storage module connects the start-up battery in parallel. In the start-up mode, the voltage of the higher voltage rapid energy storage module for connecting the start-up battery in parallel is greater than the voltage of the start-up battery, which is used to set an electrical output ratio of the start-up battery and the higher voltage rapid energy storage module respectively to provide for a load current of the start-up motor. The sum of the electrical output ratio of the start-up battery plus the electrical output ratio of the higher voltage rapid energy storage module is equal to 1.

A self-charging auxiliary power system is configured to be mounted on a vehicle and includes a hydraulic generator and at least one battery. The battery is electrically coupled to and operable to be charged by the hydraulic generator. A cooling system is operable to cool hydraulic fluid that drives the hydraulic generator. A housing protects the at least one battery.

A lithium-ion battery assembly configured to provide electric power to a vehicle. The battery assembly includes a plurality of battery cells interconnected to provide a combined electrical potential between positive and negative terminals of the battery assembly, and a printed circuit board assembly (PCBA) disposed adjacent to a first array of battery cells of the plurality of battery cells. The PCBA includes a collector plate electrically coupled with the first array of battery cells, a temperature sensor configured to obtain temperature readings, a plurality of heaters configured to generate heat using electrical power, and an assembly processor. The assembly processor is configured to obtain readings from the temperature sensor, determine an estimated battery cell temperature, and initiate a heating program by delivering electrical power to the plurality of heaters from an electrical power source when the estimated battery cell temperature is below a threshold.

A system and method includes a secondary energy storage system (SESS) and a control system. The SESS is configured to be disposed onboard a vehicle and conductively connected via switch devices to a primary battery and a cranking device of the vehicle. The control system is configured to control the switch devices to close a conductive path to discharge electric current from the SESS for powering the cranking device to rotate an engine shaft during a cranking operation. The control system is configured to control the switch devices to open the conductive path and prevent discharge of electric current from the SESS after the cranking operation is complete.