Power supply system for electrically powered vehicle, electrically powered vehicle, and method for controlling the same
First Claim
1. A power supply system for an electrically powered vehicle incorporating a motor for generating power to drive the vehicle and an internal combustion engine configured to be able to generate said power to drive the vehicle independently of said motor,said electrically powered vehicle having, as a travel mode, a first mode allowing said motor to generate said power to drive the vehicle and a second mode allowing said motor and said internal combustion engine to generate said power to drive the vehicle,said power supply system comprising:
- a main power storage device for supplying electric power to an inverter for driving and controlling said motor;
a plurality of sub power storage devices provided in parallel to each other; and
a switching control device configured to a selected sub power storage device for supplying electric power to said inverter, between said plurality of sub power storage devices,said switching control device including;
a switching determination unit for determining whether said selected sub power storage device should be switched based on a state of charge of each of said plurality of sub power storage devices; and
a connection switching unit configured to switch said selected sub power storage device when said switching determination unit determines that said selected sub power storage device should be switched, andsaid switching determination unit determining that said selected sub power storage device should not be switched regardless of said state of charge of said selected sub power storage device, while said travel mode is said second mode.
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Accused Products
Abstract
A power supply system includes a main power storage device and a plurality of sub power storage devices. A converter is connected to selected one of the sub power storage devices to convert voltage between the selected sub power storage device and an electric power feeding line bidirectionally. When the travel mode of an electrically powered vehicle is an EV mode, switching processing of a sub power storage device is performed based on the selected sub power storage device'"'"'s SOC. On the other hand, when the travel mode of the electrically powered vehicle is an HV mode, control under which the SOC of the main power storage device and the plurality of sub power storage devices as a whole is kept constant is carried out, and switching of the selected sub power storage device is prohibited.
31 Citations
13 Claims
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1. A power supply system for an electrically powered vehicle incorporating a motor for generating power to drive the vehicle and an internal combustion engine configured to be able to generate said power to drive the vehicle independently of said motor,
said electrically powered vehicle having, as a travel mode, a first mode allowing said motor to generate said power to drive the vehicle and a second mode allowing said motor and said internal combustion engine to generate said power to drive the vehicle, said power supply system comprising: -
a main power storage device for supplying electric power to an inverter for driving and controlling said motor; a plurality of sub power storage devices provided in parallel to each other; and a switching control device configured to a selected sub power storage device for supplying electric power to said inverter, between said plurality of sub power storage devices, said switching control device including; a switching determination unit for determining whether said selected sub power storage device should be switched based on a state of charge of each of said plurality of sub power storage devices; and a connection switching unit configured to switch said selected sub power storage device when said switching determination unit determines that said selected sub power storage device should be switched, and said switching determination unit determining that said selected sub power storage device should not be switched regardless of said state of charge of said selected sub power storage device, while said travel mode is said second mode. - View Dependent Claims (2, 3, 4)
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5. An electrically powered vehicle comprising:
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a motor for generating power to drive the vehicle; an internal combustion engine configured to be able to generate said power to drive the vehicle independently of said motor; an inverter for driving and controlling said motor; a main power storage device for supplying electric power to said inverter; a plurality of sub power storage devices provided in parallel to each other; and a control device configured to switch a selected sub power storage device for supplying electric power to said inverter, between said plurality of sub power storage devices, said control device including; a switching determination unit for determining whether said selected sub power storage device should be switched based on a state of charge of each of said plurality of sub power storage devices; and a connection switching unit configured to switch said selected sub power storage device when said switching determination unit determines that said selected sub power storage device should be switched, said electrically powered vehicle having, as a travel mode, a first mode allowing said motor to generate said power to drive the vehicle and a second mode allowing said motor and said internal combustion engine to generate said power to drive the vehicle, and said switching determination unit determining that said selected sub power storage device should not be switched regardless of said state of charge of said selected sub power storage device, while said travel mode is said second mode. - View Dependent Claims (6, 7, 8, 9)
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10. A method for controlling an electrically powered vehicle, said electrically powered vehicle including:
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a motor for generating power to drive the vehicle; an internal combustion engine configured to be able to generate said power to drive the vehicle independently of said motor; an inverter for driving and controlling said motor; a main power storage device for supplying electric power to said inverter; a plurality of sub power storage devices provided in parallel to each other; and a control device configured to switch a selected sub power storage device for supplying electric power to said inverter, between said plurality of sub power storage devices, said method comprising the steps of; determining whether said selected sub power storage device should be switched based on a state of charge of each of said plurality of sub power storage devices; and switching said selected sub power storage device when said step of determining determines that said selected sub power storage device should be switched, said electrically powered vehicle having, as a travel mode, a first mode allowing said motor to generate said power to drive the vehicle and a second mode allowing said motor and said internal combustion engine to generate said power to drive the vehicle, and wherein said step of determining determines that said selected sub power storage device should not be switched regardless of said state of charge of said selected sub power storage device, while said travel mode is said second mode. - View Dependent Claims (11, 12, 13)
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Specification