A vehicle includes an electric power storage device, an electric motor, and an electronic control unit. The electronic control unit is configured to control charging and discharging of the electric power storage device such that a state of charge becomes a target state of charge, to determine whether or not a degree of deterioration of the electric power storage device due to unevenness in salt concentration is equal to or larger than a predetermined degree, when the degree of deterioration is equal to or larger than the predetermined degree and the state of charge is equal to or less than a predetermined requested state of charge, to set the target state of charge such that the target state of charge increases monotonically, and to set an increase amount or an increase rate of the monotonic increase to be larger as the degree of deterioration is larger.

A method for enforced discharge of a hybrid vehicle is aimed at discharging a voltage formed in a high-voltage system of a hybrid vehicle to safely remove risk factors due to high voltage when enforced discharge is requested. The method includes determining whether enforced discharge is requested, speed-controlling a motor connected to an engine so as to transmit power to the engine to reduce speed of the motor to zero revolutions per minute, stopping the engine connected to the speed-controlled motor when the enforced discharge is requested, and performing enforced discharge control for enforced-discharging a voltage of a high-voltage system when the engine is stopped.

The disclosure relates to a vehicle architecture for controlling and regulating an electric drive of an electric or hybrid vehicle, having a power electronics system which is connected firstly to the electric drive and secondly to a battery or to a battery system. A battery management system is associated with the battery or the battery system. The vehicle architecture comprises a master controller or a controller which is equipped with a master functionality into which functionalities at least of the battery management system and of the power electronics system of the electric drive are exported.

A DC/DC converter is driven when an inter-terminal voltage of a low-voltage battery is lower than a determination voltage and an engine is started when the inter-terminal voltage becomes lower than a determination voltage during the driving of the DC/DC converter so that an alternator is driven at a predetermined driving point at which the alternator can he efficiently driven and the DC/DC converter is controlled such that the inter-terminal voltage of the low-voltage battery becomes a rated voltage. Energy efficiency can be improved since the alternator is efficiently driven.

A braking control device of an industrial vehicle includes a travel motor configured to generate regenerative braking force and a mechanical brake configured to generate mechanical braking force as a braking unit and including a battery configured to be charged by the regenerative braking force. The device is configured to acquire vehicle speed information of the industrial vehicle, acquire a regenerative current of the travel motor, execute autonomous driving with a required braking force including the regenerative braking force for causing a vehicle speed of the industrial vehicle descending a slope to be a target vehicle speed based on the vehicle speed information, and adjust distribution of the mechanical braking force in the required braking force so that the acquired regenerative current is equal to or less than an upper regenerative threshold value smaller than a maximum regenerative current.

Disclosed is a hybrid power system including a computing core, a power converter, a driving motor, an engine generator, a charging stand, and a battery pack. The power converter is coupled to the computing core. The driving motor is coupled to the power converter. The engine generator is coupled to the power converter. The charging stand is coupled to the power converter. The battery pack is coupled to the power converter. When inputting a required torque to the computing core and switching to a charging mode, an electric energy source is coupled to the charging stand and provides power to the battery pack through the power converter. The computing core executes an optimal power allocation algorithm.

A through the road (TTR) hybridization strategy is proposed to facilitate introduction of hybrid electric vehicle technology in a significant portion of current and expected trucking fleets. In some cases, the technologies can be retrofitted onto an existing vehicle (e.g., a truck, a tractor unit, a trailer, a tractor-trailer configuration, at a tandem, etc.). In some cases, the technologies can be built into new vehicles. In some cases, one vehicle may be built or retrofitted to operate in tandem with another and provide the hybridization benefits contemplated herein. By supplementing motive forces delivered through a primary drivetrain and fuel-fed engine with supplemental torque delivered at one or more electrically-powered drive axles, improvements in overall fuel efficiency and performance may be delivered, typically without significant redesign of existing components and systems that have been proven in the trucking industry.

The present invention includes a battery controller that calculates an electrical storage remaining amount of a battery, a charging/discharging request calculation part that calculates a charging/discharging request amount for keeping electric power outputted by the battery within a predetermined range based on the electrical storage remaining amount calculated, a target rotational speed calculation part that calculates a target rotational speed command value of a motor generator, and an inverter that controls the motor generator according to the target rotational speed command value calculated, and it is configured that at least one of the battery controller and the inverter calculates the actual charging/discharging amount of the battery, and that the target rotational speed calculation part calculates a target rotational speed correction value from difference between the charging/discharging request amount and the actual charging/discharging amount and corrects the target rotational speed command value.

A vehicle comprises an electric machine configured with at least one controller issuing torque commands with the use of a voltage bus. The controller may be configured to respond to a torque requests based on multiple vehicle system inputs including vehicle speed, position of the accelerator pedal and brake pedal, and various other vehicle data. The controller may respond to a torque request that exceeds a threshold value by issuing torque commands for the electric machine based on a speed of the electric machine and a voltage on the bus. Based on the speed of the electric machine and voltage on the bus, the controller may issue a constant torque output by the electric machine as the speed and voltage vary. Calculating a ratio using speed of the electric machine to voltage on the bus to determine torque capability may result as a constant torque when the ratio is constant.

An apparatus for controlling a start of an engine for a mild hybrid electric vehicle includes: a mild hybrid starter & generator (MHSG) starting an engine; a first battery connected to the MHSG through a first power cable and supplying electric power to the MHSG; a low voltage DC-DC converter (LDC) converting voltage supplied from the first battery into low voltage; a second battery supplying the low voltage to an electric load that uses the low voltage; an ignition switch including a first contact point and a second contact point; a data detector detecting data for controlling the engine start for a mild hybrid electric vehicle; and a controller determining whether a charging condition of the second battery is satisfied based on the data, and charging the second battery with electric power of the first battery when the charging condition of the second battery is satisfied.