A power supply system including: a driving motor capable of outputting power for driving a driving wheel; a main battery that stores electricity to be supplied to the driving motor; an engine capable of outputting power for driving the driving wheel; a starter motor that starts the engine; an auxiliary battery that stores electricity to be supplied to the starter motor and auxiliaries; a switch of capable of making or breaking an electric coupling between the auxiliary battery and the starter motor, and the auxiliaries and the main battery; and a control apparatus that diagnoses an abnormality in the auxiliary battery. The main battery is coupled to the auxiliaries via a DC-DC converter capable of stepping down a voltage of electricity stored in the main battery. The auxiliary battery is coupled to the auxiliaries via the switch. The controller diagnoses an abnormality in the auxiliary battery with the switch open.

A vehicle is proposed to control regeneration and reuse of captured energy in a through-the-road hybrid configuration. The vehicle comprises a vehicle frame, an energy store, and a controller. The vehicle frame is configured for over-the-roadway travel under a power of plural drive axles. At least one of the plural drive axles is coupled via a primary drivetrain to a fuel-fed engine to drive at least a pair of wheels. At least one other of the plural drive axles is an electrically-powered drive axle configured to supply supplemental torque to additional wheels. The energy store is configured to supply the electrically-powered drive axle with electrical power in a first mode of operation and receive energy recovered using the electrically-powered drive axle in a second mode of operation. The controller is coupled between the electrically-powered drive axle and one or more sensor inputs to transition between different modes of operation.

A vehicle includes an electric machine, a battery, a cooler, and a controller. The electric machine is configured to propel the vehicle. The battery is configured to power the electric machine. The cooler is configured to cool the battery. The controller is programmed to, responsive to the vehicle traveling from first to second locations on a predetermined route, operate the electric machine such that battery charge is depleted from an initial charge at the first location to a minimum battery charge limit upon arrival at the second location. The controller is also programmed to, responsive to the vehicle traveling from first to second locations on a predetermined route, operate the cooler such that battery temperature increases from an initial temperature at the first location to a battery shutdown temperature limit at the second location.

A hybrid vehicle control method controls a hybrid vehicle having an electric power source, a vehicle electrical equipment and drive motor to which electric power is supplied from the electric power source. The vehicle electrical equipment and the drive motor are electrically connected to the electric power source via at least a shared harness. When a temperature of the harness is equal to or greater than a predetermined temperature, upper limit values of electric power supplied from the electric power source to the vehicle electrical equipment and the drive motor are both reduced, and a degree of reduction in the upper limit value for the vehicle equipment is greater than a degree of reduction in the upper limit value for the drive motor.

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 trailer, a tractor-trailer configuration, 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.

A hybrid vehicle includes: a driving power source including an engine and an electric motor; a battery that supplies electric power to the electric motor; and a controller that controls the engine and the electric motor according to a temperature of the battery. When a predetermined EV mode condition is satisfied, and a normal-temperature condition in which the temperature of the battery is a threshold or more is satisfied, the controller controls the driving power source in an EV mode in which the electric motor is driven. When the EV mode condition is satisfied, and a low-temperature condition in which the temperature of the battery is less than the threshold is satisfied, the controller operates the electric motor in a state where electric current flows between the battery and the electric motor drives the engine such that the engine generates traveling power transmitted to a driving wheel.

When a scheduled traveling route is changed during travelling of an electrical vehicle, a management ECU of the electrical vehicle maintains control of a travelling mode based on a travelling plan created based on the scheduled traveling route before the change, in accordance with a result of comparison between first attribute information and second attribute information, the first attribute information indicating an attribute of at least one section, which is located within a predetermined distance from a section in which the electrical vehicle is located and located in a vehicle travelling direction, of the scheduled traveling route before the change, the second attribute information indicating an attribute of at least one section, which is located within a predetermined distance from a section in which the electrical vehicle is located and located in a vehicle travelling direction, of the scheduled traveling route after the change.

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.

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.

Methods and systems are provided for a hybrid electric vehicle. In one example, a method may include delaying an electric-only operation of the hybrid vehicle in response to a powertrain temperature being less than a threshold powertrain temperature and an electric-only range being less than a distance between a current location and a recharging location. The electric-only operation may be initiated in response to one or more of the powertrain temperature exceeding the threshold powertrain temperature and the electric-only range being equal to the distance.