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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYoshinobu Sugiyama, Wanleng Ang
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During external charging, a charger converts AC electric power from an external power supply into electric power for charging a main battery. An AC/DC converter converts the AC electric power on the power line into auxiliary electric power. The charger is further capable of executing power conversion for converting output electric power of the main battery into AC electric power for output to the power line. While a vehicle is running, normally, the charger and the AC/DC converter are stopped, and the auxiliary electric power obtained by converting the output electric power of the main battery by a main DC/DC converter is output. At the time of regenerative braking of the vehicle, where charging of the main battery is prohibited or restricted, the charger and the AC/DC converter are further operated to intentionally increase loss power, thereby generating auxiliary electric power.
A power supply apparatus for an electrically powered vehicle comprising:
A method for controlling a power supply apparatus for an electrically powered vehicle including a main power storage device and a subpower storage device having output voltage lower than that of said main power storage device,
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
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Supplying electric power to auxiliary equipment of vehicles
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Supplying electric power to auxiliary equipment of vehicles: to electric lighting circuits
Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy…:…
About 4 years 11 months of term left · ends 8 Oct 2031 (estimated)
This invention relates to a power supply apparatus for an electrically powered vehicle and to a method of controlling the same. More particularly, this invention relates to a power supply apparatus for an electrically powered vehicle equipped with a main power storage device and a subpower storage device which are chargeable by a power supply outside the vehicle.
An electric vehicle, a hybrid vehicle, or a fuel cell vehicle has been known as an electrically powered vehicle configured such that a traction motor can be driven using electric power from a power storage device mounted on the vehicle, represented by a secondary battery. For an electrically powered vehicle, a configuration for charging the power storage device mounted on the vehicle by a power supply outside the vehicle (hereinafter also simply referred to as an “external power supply”) has been proposed. Charging of the power storage device by the external power supply will hereinafter also be simply referred to as “external charging”.
Japanese Patent Laying-Open No. 2009-225587 (PTL 1) describes a configuration of an electrically powered vehicle equipped with a power storage device chargeable by an external power supply. In the electrically powered vehicle described in PTL 1, in order to ensure both charging efficiency and operation of an auxiliary load system at the time of external charging, the auxiliary load system including an auxiliary battery is connected to an electric power path between a power converter for external charging and a main battery.
FIG. 1 is a block diagram showing an exemplary configuration of a power supply apparatus for an electrically powered vehicle in accordance with an embodiment of the present invention.
FIG. 2 is a circuit diagram for illustrating an exemplary configuration of a charger shown in FIG. 1.
FIG. 3 is a flowchart for illustrating control operation for an auxiliary power feed system while the vehicle is running, in the power supply apparatus for the electrically powered vehicle in accordance with the embodiment of the present invention.
Embodiments of the present invention will hereinafter be described in detail with reference to the drawings. In the following, the same or corresponding portions in the figures are labeled with the same reference characters, and description thereof will not be repeated in principle.
FIG. 1 is a block diagram showing an exemplary configuration of a power supply apparatus for an electrically powered vehicle in accordance with an embodiment of the present invention.
With reference to FIG. 1, an electrically powered vehicle 100 includes a main battery 10, a power control unit (PCU) 20, a motor generator 30, a power transmission gear 40, a driving wheel 50, a braking mechanism 55, and an ECU (Electronic Control Unit) 80.