A power supply system for an electric vehicle includes a battery module, a first DC/DC converter, a second DC/DC converter, a first switch, a second switch and a third switch. The battery module has a negative electrode, a first positive electrode and a second positive electrode. The first DC/DC converter has an input terminal connected with the second positive electrode. The second DC/DC converter has an input terminal connected with the second positive electrode. The first switch is connected between the second positive electrode and the first DC/DC converter. The second switch is connected between the second positive electrode and the second DC/DC converter. The third switch is connected between the first positive electrode and an output terminal of the second DC/DC converter.

A power supply system for an electric vehicle includes a battery module, a first DC/DC converter, a second DC/DC converter, a first switch, a second switch and a third switch. The battery module has a negative electrode, a first positive electrode and a second positive electrode. The first DC/DC converter has an input terminal connected with the second positive electrode. The second DC/DC converter has an input terminal connected with the second positive electrode. The first switch is connected between the second positive electrode and the first DC/DC converter. The second switch is connected between the second positive electrode and the second DC/DC converter. The third switch is connected between the first positive electrode and an output terminal of the second DC/DC converter.

A vehicle power supply control device includes trunk line units of two systems provided in a vehicle; branch line units branched from the trunk line units of two systems; a vehicle power supply master coupled to one side of the trunk line units of two systems and includes a main battery that charges and discharges electric power; and a plurality of area power supply masters coupled to the trunk line units of two systems via the branch line units, coupled to a load that consumes electric power, and each include an area battery that charges and discharges electric power. The vehicle power supply master supplies electric power of the main battery to the area power supply masters via the trunk line units of two systems, and the area power supply masters supply, to the load, electric power supplied from the vehicle power supply master or charged in the area battery.

A charging and heating circuit is equipped with an AC voltage connection, a DC voltage connection and a rectifier. The rectifier is connected between the AC voltage connection and the DC voltage connection. The charging and heating circuit further includes a heating resistor which is connected to the rectifier and the rectifier is thereby set up to supply the heating resistor with current. Also described is a vehicle electrical system which includes the charging and heating circuit in addition to an accumulator.

A hybrid energy system is provided in a vehicle including an autonomous power supply and being connectable to an external power supply infrastructure along the route of the vehicle, and which vehicle is arranged to operate in an autonomous power supply mode and/or in an external power supply mode. The system includes a first high voltage circuit including a first traction motor connected to an energy storage system by a first power converter for propelling the vehicle; a second high voltage circuit including a second traction motor connectable to an external power supply by a second power converter for propelling the vehicle; and where the first high voltage circuit and the second high voltage circuit are connectable by a third power converter between the first and the second power converters. A method for operating the hybrid energy system is also provided.

Systems and methods of providing a configurable powertrain in a vehicle are disclosed. The powertrain is capable of operating in a plurality of powertrain configurations and includes one or more reversible generators, a battery system, a motor/generator (M/G), and one or more drive axles. The generators generate and supply electrical power to the battery system, the M/G, an external power source, or a combination thereof. The battery system selectively supplies electrical power to the generators, the M/G, the external power source, or a combination thereof. The one or more generators also selectively supply cooling to the battery system, a cab of the vehicle, a trailer or external enclosure or structure of the vehicle, or a combination thereof. The powertrain configurations of the vehicle include operating the components of the powertrain in various combinations based on demands of the vehicle and/or external power sources or structures.

Provided is a vehicle including an internal combustion engine, a generator a traction battery, a relay, an electric motor, an auxiliary battery, an electric heater, and a controller. The controller is configured to place the relay in a cut-off state when, at the time of the internal combustion engine being started, temperature of the traction battery is lower than a first predetermined temperature, and charging the auxiliary battery with electric power generated by the generator, and supply the electric power generated by the generator to the electric heater to raise the temperature of the traction battery, until the temperature of the traction battery exceeds a second predetermined temperature that is higher than the first predetermined temperature.

An electrified fire fighting vehicle includes a chassis, a cab coupled to the chassis, a body coupled to the chassis rearward of the cab, a generator, an engine coupled to the generator, a service panel having one or more export power ports, a battery pack, and a power distribution system. The power distribution system includes an inverter coupled to the generator and a power distribution unit coupled to the battery pack, the inverter, and the service panel. The power distribution system is configured to facilitate exporting power provided by the generator through the one or more export power ports of the service panel independent of a function of the battery pack and independent of an availability of charge within the battery pack.

An electrified fire fighting vehicle includes a chassis, a cab coupled to the chassis, a body coupled to the chassis rearward of the cab, a generator, an engine coupled to the generator, a service panel having one or more export power ports, a battery pack, and a power distribution system. The power distribution system includes an inverter coupled to the generator and a power distribution unit coupled to the battery pack, the inverter, and the service panel. The power distribution system is configured to facilitate exporting power provided by the generator through the one or more export power ports of the service panel independent of a function of the battery pack and independent of an availability of charge within the battery pack.

An electrified fire fighting vehicle includes a chassis having a pair of frame rails, a cab coupled to the chassis, a body coupled to the chassis rearward of the cab, an electric motor coupled to the chassis between the pair of frame rails, an energy storage system positioned between the cab and the body, and a shield. The energy storage system includes a power cable coupled to the electric motor. The shield is positioned (a) between the pair of frame rails and (b) at least partially along and around a motor housing of the electric motor such that the power cable is disposed between the motor housing and the shield.