A method of operating an electric power system, which may include: determining a charge state of a first battery unit and a charge state of a second battery unit; determining a difference between the charge state of the first battery unit and the charge state of the second battery unit; and determining whether to enable discharging simultaneously of both the first battery unit and the second battery unit, or to enable discharging of one of the first and second battery units, based on the difference between the charge state of the first battery unit and the charge state of the second battery unit. At least one of the first and second battery units may be a swappable battery unit. The disclosure further relates to an electric power system and to a computer executable code including instructions for operating an electric power system.

This application provide a refrigerant thermal management module and a thermal management system. Components in the refrigerant thermal management module are centrally arranged, so that a pipeline connected between the components is shortened and a refrigerant flow resistance is reduced, improving working performance of a refrigerant loop. In addition, a platform-based design is implemented through modular design. In addition, a plate heat exchanger in the refrigerant loop is used to absorb heat from a coolant loop in a vehicle function module, to implement a function of cooling the vehicle function module; and a condenser in the refrigerant loop is used to release heat to the coolant loop of the vehicle function module, to implement a function of heating the vehicle function module. Regardless of whether the vehicle function module needs to be heated or cooled, refrigerant flows in the refrigerant thermal management module keep a same direction of circulation.

Provided is a power supply and distribution system, the power supply and distribution system includes at least one non-isolated AC/DC converter unit, an MV DC bus and multiple isolated DC/DC converter units, and the at least one non-isolated AC/DC converter unit is connected between an MV AC grid and the MV DC bus, and is configured to convert an input MV AC voltage to an output MV DC voltage, where the output MV DC voltage is fed into the MV DC bus, the multiple isolated DC/DC converter units are connected to the MV DC bus in parallel via MV class cables, and are configured to convert a voltage level from the MV DC bus to a charging voltage level. The power supply and distribution system can be used for charging the EVs.

A method for operating a processor controlling a dual battery mounted on a hybrid electric vehicle, includes opening a relay positioned between a first battery for a load and a second battery for starting, and checking whether the attempt to start is successful when an attempt to start the hybrid electric vehicle is detected, closing the relay so that the first battery and the second battery are electrically connected in parallel when the processor concludes that the attempt to start is unsuccessful, and charging the second battery by entering the second battery into a charging mode when a reattempt to start the hybrid electric vehicle is successful.

A fluid moving apparatus includes an electric motor having a rotor and a stator and a propeller. The rotor rotates relative to the stator on an axis to generate a rotational output. The rotational output is provided to the propeller to power the marine propulsion apparatus. The stator includes one or more coils configured to power rotation of the rotor. The one or more coils extend circumferentially around and can be coaxial on the axis. A portion of a housing of the motor extends into the aquatic environment to facilitate heat dissipation.

A proposal system includes a processor. The processor is configured to propose to a user of a battery electric vehicle a rental vehicle the user is able to use during charging of an energy storage device mounted on the battery electric vehicle in order to allow the user to use the battery electric vehicle in a charged state in which the energy storage device has been charged.

A device to convert a detected voltage, that is indicative of current conducted by a switching circuit, to a series of electrical pulses that is indicative of electrical power dissipated by the switching circuit responsive to the current. The device includes a transconductor circuit including a first circuit to receive a reference current and a first reference voltage, and to obtain a transconductance based on an auto-generated bias current and the reference current and the first reference voltage, where a value of the transconductance is determined by the reference current and the first reference voltage. The transconductor circuit further includes a second circuit coupled to the first circuit to receive the detected voltage, and to generate a first current based on the detected voltage and the obtained transconductance.

The present application describes systems and methods for authenticating rechargeable batteries in a rechargeable battery cabinet. The rechargeable battery cabinet may be a part of a large, scalable, distributed network of rechargeable battery cabinets, in which rechargeable battery cabinets may be removed or added based on consumer demand for fresh batteries. The system and methods may track the rechargeable batteries and where they are located in the rechargeable battery cabinets by first assigning a dynamic identification number, such that a rechargeable battery compartment does not need a static identifier. The system and method may allow for real-time reading of the status of rechargeable battery cabinets and rechargeable batteries in the system. Each rechargeable battery may have a static identifier to uniquely identify the rechargeable battery. This system and method allows for efficient scaling and identification of rechargeable battery within the system.

Techniques are described herein for fleet electrification management. A method includes determining a composition of electric vehicles (EVs) to replace at least a portion of non-electric vehicles in a vehicle fleet while satisfying travel requirements of the vehicle fleet. The method includes estimating an energy demand of the composition of EVs. The method includes determining an electric vehicle supply equipment (EVSE) charging infrastructure to meet the estimated energy demand. The method includes providing one or more recommendations including at least one of: a fleet electrification recommendation for transitioning the vehicle fleet into the composition of EVs, or a charging infrastructure recommendation for implementing the EVSE charging infrastructure.

In an example embodiment, a system includes an inverter configured to operate in at least one of a charging mode or a drive mode, a cascaded direct current (DC)-DC converter, the DC-DC converter including a first portion of the inverter and at least one controller configured to selectively couple the first portion of the inverter to a first portion of the cascaded DC-DC converter during the charging mode, and selectively couple the inverter to a second portion of the cascaded DC-DC converter during the drive mode.