HYBRID VEHICLE AND METHOD FOR CONTROLLING THE SAME
First Claim
1. A hybrid vehicle comprising:
- a motor for generating power to drive the vehicle;
an internal combustion engine configured to be capable of outputting power to drive the vehicle independently of said motor;
a main power storage device;
an electric power feeding line for supplying electric power to an inverter that controls and drives said motor;
a first voltage converter provided between said electric power feeding line and said main power storage device and configured to convert voltage bidirectionally;
a plurality of sub power storage devices provided in parallel to each other;
a second voltage converter provided between said plurality of sub power storage devices and said electric power feeding line and configured to convert voltage between one of said plurality of sub power storage devices and said electric power feeding line bidirectionally;
a connection unit provided between said plurality of sub power storage devices and said second voltage converter and configured to selectively connect a selected sub power storage device among said plurality of sub power storage devices to said second voltage converter;
a switching control device configured to control selective connection between said plurality of sub power storage devices and said second voltage converter; and
a traveling control unit for dividing and thus assigning a total required power for hybrid vehicle to power output from said motor and power output from said internal combustion engine,said traveling control unit prohibiting a process for starting said internal combustion engine which is being stopped and prohibiting a process for stopping said internal combustion engine which is being operated, while a process for switching connection between said plurality of sub power storage devices and said second voltage converter is being performed.
1 Assignment
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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 a 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. In response to decrease in SOC of the selected sub power storage device being used, a request to switch the sub power storage device is generated and accordingly a switching process for a relay is performed. Here, while a process for starting or stopping an engine is being performed, the request to switch will not be generated even when decrease in SOC is detected. Likewise, while a process for switching the sub power storage device is being performed, the process for starting or stopping the engine will not be started even when a request to start or stop the engine is generated.
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Citations
12 Claims
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1. A hybrid vehicle comprising:
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a motor for generating power to drive the vehicle; an internal combustion engine configured to be capable of outputting power to drive the vehicle independently of said motor; a main power storage device; an electric power feeding line for supplying electric power to an inverter that controls and drives said motor; a first voltage converter provided between said electric power feeding line and said main power storage device and configured to convert voltage bidirectionally; a plurality of sub power storage devices provided in parallel to each other; a second voltage converter provided between said plurality of sub power storage devices and said electric power feeding line and configured to convert voltage between one of said plurality of sub power storage devices and said electric power feeding line bidirectionally; a connection unit provided between said plurality of sub power storage devices and said second voltage converter and configured to selectively connect a selected sub power storage device among said plurality of sub power storage devices to said second voltage converter; a switching control device configured to control selective connection between said plurality of sub power storage devices and said second voltage converter; and a traveling control unit for dividing and thus assigning a total required power for hybrid vehicle to power output from said motor and power output from said internal combustion engine, said traveling control unit prohibiting a process for starting said internal combustion engine which is being stopped and prohibiting a process for stopping said internal combustion engine which is being operated, while a process for switching connection between said plurality of sub power storage devices and said second voltage converter is being performed. - View Dependent Claims (2, 3, 5)
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4. A hybrid vehicle mounted with a motor for generating power to drive the vehicle and an internal combustion engine configured to be capable of outputting power to drive the vehicle independently of said motor,
said hybrid vehicle comprising: -
a main power storage device; an electric power feeding line for supplying electric power to an inverter that controls and drives said motor; a first voltage converter provided between said electric power feeding line and said main power storage device and configured to convert voltage bidirectionally; a plurality of sub power storage devices provided in parallel to each other; a second voltage converter provided between said plurality of sub power storage devices and said electric power feeding line and configured to convert voltage between one of said plurality of sub power storage devices and said electric power feeding line bidirectionally; a connection unit provided between said plurality of sub power storage devices and said second voltage converter and configured to selectively connect a selected sub power storage device among said plurality of sub power storage devices to said second voltage converter; and a switching control device configured to control selective connection between said plurality of sub power storage devices and said second voltage converter, said switching control device including; a switching determination unit for determining, based on a state of charge of a residual capacity of said selected sub power storage device being used, whether generation of a request to switch said selected sub power storage device is necessary; and a switching prohibition unit for instructing said switching determination unit not to generate the request to switch said selected sub power storage device, while a process for starting or a process for stopping said internal combustion engine is being performed. - View Dependent Claims (11)
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6. A method for controlling a hybrid vehicle,
said hybrid vehicle including: -
a motor for generating power to drive the vehicle; an internal combustion engine configured to be capable of outputting power to drive the vehicle independently of said motor; a main power storage device; an electric power feeding line for supplying electric power to an inverter that controls and drives said motor; a first voltage converter provided between said electric power feeding line and said main power storage device and configured to convert voltage bidirectionally; a plurality of sub power storage devices provided in parallel to each other; a second voltage converter provided between said plurality of sub power storage devices and said electric power feeding line and configured to convert voltage between one of said plurality of sub power storage devices and said electric power feeding line bidirectionally; a connection unit provided between said plurality of sub power storage devices and said second voltage converter and configured to selectively connect a selected sub power storage device among said plurality of sub power storage devices to said second voltage converter; a switching control device configured to control selective connection between said plurality of sub power storage devices and said second voltage converter; and a traveling control unit for dividing and thus assigning a total required power for said hybrid vehicle to power output from said motor and power output from said internal combustion engine, said method comprising the steps of; determining whether a process for switching connection between said plurality of sub power storage devices and said second voltage converter is being performed; and prohibiting a process for starting said internal combustion engine which is being stopped and a process for stopping said internal combustion engine which is being operated, while said process for switching is being performed. - View Dependent Claims (7, 8, 10)
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9. A method for controlling a hybrid vehicle,
said hybrid vehicle including: -
a motor for generating power to drive the vehicle; an internal combustion engine configured to be capable of outputting power to drive the vehicle independently of said motor; a main power storage device; an electric power feeding line for supplying electric power to an inverter that controls and drives said motor; a first voltage converter provided between said electric power feeding line and said main power storage device and configured to convert voltage bidirectionally; a plurality of sub power storage devices provided in parallel to each other; a second voltage converter provided between said plurality of sub power storage devices and said electric power feeding line and configured to convert voltage between one of said plurality of sub power storage devices and said electric power feeding line bidirectionally; a connection unit provided between said plurality of sub power storage devices and said second voltage converter and configured to selectively connect a selected sub power storage device among said plurality of sub power storage devices to said second voltage converter; and a switching control device configured to control selective connection between said plurality of sub power storage devices and said second voltage converter, said method comprising the steps of; determining, based on a state of charge of a residual capacity of the selected sub power storage device being used, whether generation of a request to switch said selected sub power storage device is necessary; and issuing an instruction not to generate said request to switch, regardless of the state of charge of said selected sub power storage device, while a process for starting or a process for stopping said internal combustion engine is being performed. - View Dependent Claims (12)
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Specification