This disclosure describes vehicle systems and methods for controlling charging of an auxiliary battery of an electrified vehicle. Exemplary charging methods align the charge management of an auxiliary battery to occur only during low cost charging windows.

A system for controlling a low voltage DC-DC converter for a vehicle is provided. The system includes a low voltage DC-DC converter that converts a voltage of a main battery into a low voltage and outputs the same. An electric device is connected to an output terminal of the low voltage DC-DC converter and a first relay is connected to the output terminal of the low voltage DC-DC converter at a first terminal thereof. An auxiliary battery is connected to a second terminal of the first relay and a controller turns off the first relay and operates the low voltage DC-DC converter to output a minimum voltage capable of operating the electric device when the auxiliary battery is charged to a preset reference value or more while the main battery is being charged.

Vehicle depots or yards adapted to charge multiple electric vehicles include multiple charging electrodes to simultaneously direct power to multiple electric vehicles. The charging electrodes may direct power to the electric vehicles from an utility grid or from a secondary power source.

The present invention provides a multilayer transformer PCB structure for an electric car and manufacturing method for the same, which includes first and second connecting copper tabs horizontally formed in plural on both surfaces of a base substrate, thereby forming inner layer circuits coupled to battery cells, and third and fourth connecting copper tabs stacked on a top surface of the first connecting copper tab and a top surface of the second connecting copper tab by patterning process a copper material several times as a predetermined thickness, thereby forming outer layer circuits coupled to the battery cells. According to the present invention configured thus, the transformer PCB for an electric car has a structure in which a conductive material having a predetermined thickness is stacked in a multilayer form, and thus an increased quantity of charges to be treated is highly distributed, thereby maximizing current efficiency.

A charging system includes: first stations configured to determine whether to transmit charger detection signals based on a preset charging mode and a state of charge of a battery included in a vehicle; and second stations configured to receive the charger detection signals or to transmit beacon signals to the transmitter based on the state of charge of the battery.

An ECU of an electric vehicle supplies a target rotation speed RT having a value corresponding to the temperature TB of a main battery to a cooler, controls a main DC/DC converter such that the SOC of an auxiliary battery is in a predetermined range SOCL to SOCH less than 100% when a cooling fan in the cooler is driven at the target rotation speed (RT), and controls the main DC/DC converter such that the SOC of the auxiliary battery is 100% when the cooling fan is not driven at the target rotation speed (RT).

A three-dimensional circuiting garage is provided. The three-dimensional circulating garage includes: a fixing frame including a first fixing support and a second fixing support; a transmission system including a transmission device disposed on the fixing frame, and a tray track disposed on at least one of the first and second fixing supports; a plurality of tray units each including; a tray frame, a vehicle carrying plate, and a tray stabilizing beam; and a driving device connected with the transmission device to drive the transmission device so as to drive the tray unit to move up and down reciprocally in a cyclical manner along the tray track; wherein when two adjacent tray units move in a vertical direction, a lower surface of the vehicle carrying plate of an upper tray unit is supported on the tray stabilizing beam of a lower tray unit.

A charging apparatus 1 includes one or more chargers 2, wherein the chargers 2 each include a communication control unit 24 that is capable of communicating with a vehicle-mounted communication unit 5 or another charger 2, and, according to an output-power command value C1 transmitted from the vehicle-mounted communication unit 5 or an output-power command value C2 transmitted from the other charger 2, the communication control unit 24 sets an output-power command value C3 for a charger 2 associated therewith, and transmits the output-power command value C1 or C2 to the other charger 2 when the other charger 2 has been connected.

A vehicle power source system includes: a high-voltage battery; a high-voltage system equipment having a DC-DC converter and a charger; and a cooling circuit having a high-voltage battery cooling unit for cooling the high-voltage battery, a DC-DC converter cooling unit for cooling the DC-DC converter, and charger cooling unit for cooling the charger. In the cooling circuit, the DC-DC converter cooling unit and the charger cooling unit are disposed in parallel on a downstream side of the high-voltage battery cooling unit.

A control device executes abnormality detection processing for detecting an abnormality of a current sensor. The abnormality detection processing includes first processing which is executed in a case where, during reception of electric power from a power supply, a state of charge of a power storage device is equal to or greater than a predetermined amount and electric power is supplied to an electrically heated catalyst device. The first processing includes processing for detecting an abnormality of the current sensor by estimating a current supplied to the electrically heated catalyst device using a detection value of a charging current sensor and comparing the estimated value with a detection value of the current sensor.