Cooling systems of a work vehicle that provide targeted cooling, regenerative cooling and/or a combination therein. A cooling system includes plural fans configured to provide airflow across a radiator and a fan controller in communication with the plural fans. The fan controller is configured to receive operating condition data associated with at least one of the radiator and an engine. The fan controller is configured to determine a total target heat rejection value based on the operating condition data; determine a plurality of target fan operation values for the plural fans, based on the total target heat rejection value and the operating condition data; and control operation of the plural fans at plural independent fan speeds based on the plural fan operation values.

An on-board distributed power supply system is coupled to an on-board distributed drive system. The on-board distributed drive system includes at least two power trains, and the on-board distributed power supply system includes at least two low-voltage battery pack groups. Each low-voltage battery pack group of the at least two low-voltage battery pack groups includes at least one low-voltage battery pack. Each low-voltage battery pack of the at least one low-voltage battery pack includes a plurality of battery cells. Each low-voltage battery pack group of the at least two low-voltage battery pack groups is correspondingly electrically connected to at least one of the power trains in the on-board distributed drive system, and is configured to provide electric energy for each power train of the at least two power trains in the on-board distributed drive system.

A bidirectional two-phase chopper circuit boosts a voltage of direct-current power converted by an AC/DC converter to output it to a high-voltage battery and steps down a voltage of direct-current power being supplied to a low-voltage load unit from the high-voltage battery. A connector is connected to a quick charger supplying direct-current power. A connector is connected to a superquick charger supplying direct-current power having a higher voltage than that of the quick charger.

An electric power distribution system includes a first path through which electric power is supplied to a main load; a second path through which electric power is supplied to the backup load; a third path that connects a second DC/DC converter and a first battery; a fourth path that connects the first battery and the first DC/DC converter in parallel to the main load; and a control unit that controls an output voltage of the second DC/DC converter according to an assumed output capacity derived from travel route information of a navigation system mounted on the vehicle. The assumed output capacity is a capacity that is able to supply electric power used for a driven load in the backup load, and is set to be lower than a threshold battery capacity that is lower than in a fully charged state of the second battery.

A vehicle electrical system is equipped with at least one high-voltage consumer, a DC charging connection a rechargeable battery, a rectifier and a changeover switch. The high-voltage consumer is connected to the rechargeable battery by the changeover switch via a first switching device in a first switching position of the changeover switch and is connected to the rechargeable battery by the changeover switch in a second switching position of the changeover switch via a second switching device, wherein the DC charging connection is connected to the rechargeable battery via the first switching device.

An electric power source system for a vehicle includes: a high-voltage battery; a first electric power source arrangement; a second electric power source arrangement; and a third electric power source arrangement, wherein the first electric power source arrangement includes a first DCDC converter and a first battery and is configured to supply the electric power to a first load including at least an automatic driving system, the second electric power source arrangement includes a second DCDC converter and a second battery and is configured to supply the electric power to a second load including at least a steering ECU, a brake ECU, and an information communication unit, and the third electric power source arrangement includes a connection controller and a third battery and is configured to supply the electric power to a third load including at least the steering ECU, the brake ECU, and the information communication unit.

A monitoring method includes, among other things, within an electrified vehicle, providing an accessory battery that is configured to power an electrical bus, and a traction battery that is configured to power the electrical bus. The method further includes loading the electrical bus with electrical loads of the electrified vehicle when an amount of power provided to the electrical bus by the traction battery is reduced. After the loading, the method compares an electrical parameter of the accessory battery to a threshold value to assess a condition of the accessory battery.

Effectively utilize a capacitor for supplying power to a load when a battery abnormality occurs. A power supply device for connecting to a battery and a load to which power is supplied from the battery includes: a capacitor; a first switch for switching a connection state between the battery and the capacitor; a second switch for switching a connection state between the capacitor and the load; and a control unit for detecting a state of charge of the capacitor and abnormality of the battery. When the abnormality of the battery is not detected, the control unit turns on the first switch and turns off the second switch when the capacitor is not charged, and maintains the first switch on after the capacitor is fully charged.

Effectively utilize a capacitor for supplying power to a load when a battery abnormality occurs. A power supply device for connecting to a battery and a load to which power is supplied from the battery includes: a capacitor; a first switch for switching a connection state between the battery and the capacitor; a second switch for switching a connection state between the capacitor and the load; and a control unit for detecting a state of charge of the capacitor and abnormality of the battery. When the abnormality of the battery is not detected, the control unit turns on the first switch and turns off the second switch when the capacitor is not charged, and maintains the first switch on after the capacitor is fully charged.

A power supply system of a vehicle is provided. The system includes a high-voltage battery for storing power and a power relay that is disposed between the high-voltage battery and an electric load. A first converter receives the power from the high-voltage battery through the power relay and a second converter bypasses the power relay to directly receive the power from the high-voltage battery. The electric load receives the power from at least any one of the first converter and the second converter.