Power supply device for vehicle and method of controlling the same
First Claim
1. A power supply device for a vehicle comprising:
- a first electric storage device;
a second electric storage device;
a first rotating electric machine driving a wheel;
a selection switch selecting one of said first and second electric storage devices and connecting the selected electric storage device to said first rotating electric machine; and
a control device controlling switching of said selection switch in accordance with a state of charge of each of said first and second electric storage devices,in a case where said selection switch selects said first electric storage device, when charging is performed so that the state of charge of said first electric storage device becomes higher than a first prescribed level, said control device instructing said selection switch to select said second electric storage device.
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Accused Products
Abstract
A power supply device for a vehicle includes a battery serving as a first electric storage device, a battery serving as a second electric storage device, a motor generator driving a wheel, a selection switch selecting one of the first and second electric storage devices and connecting the selected electric storage device to the motor generator, and a control device controlling switching of the selection switch in accordance with a state of charge of each of the first and second electric storage devices. In the case where the selection switch selects the first electric storage device, when charging is performed and the state of charge of the first electric storage device becomes higher than a first prescribed level, the control device instructs the selection switch to select the second electric storage device.
84 Citations
22 Claims
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1. A power supply device for a vehicle comprising:
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a first electric storage device; a second electric storage device; a first rotating electric machine driving a wheel; a selection switch selecting one of said first and second electric storage devices and connecting the selected electric storage device to said first rotating electric machine; and a control device controlling switching of said selection switch in accordance with a state of charge of each of said first and second electric storage devices, in a case where said selection switch selects said first electric storage device, when charging is performed so that the state of charge of said first electric storage device becomes higher than a first prescribed level, said control device instructing said selection switch to select said second electric storage device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A power supply device for a vehicle, comprising:
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a first electric storage device; a second electric storage device; a first rotating electric machine receiving electric power from said first electric storage device and driving a wheel; a voltage converting unit provided between said first and second electric storage devices, for receiving and transferring electric power between said first and second electric storage devices; and a control device controlling said voltage converting unit in accordance with a state of charge of each of said first and second electric storage devices, in a case where charging of said first electric storage device is performed, when the state of charge of said first electric storage device becomes higher than a first prescribed level, said control device instructing said voltage converting unit to perform a voltage converting operation such that said second electric storage device is charged from said first electric storage device, and when energy in said first electric storage device is consumed and the state of charge of said first electric storage device becomes lower than a second prescribed level, said control device instructs said voltage converting unit to perform the voltage converting operation such that said first electric storage device is charged from said second electric storage device. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A power supply device for a vehicle, comprising:
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a first electric storage device; a second electric storage device; a first rotating electric machine receiving electric power from said first electric storage device and driving a wheel; a voltage converting unit provided between said first and second electric storage devices, for receiving and transferring electric power between said first and second electric storage devices; and a control device controlling said voltage converting unit in accordance with a state of charge of each of said first and second electric storage devices, in a case where charging of said first electric storage device is performed, when the state of charge of said first electric storage device becomes higher than a first prescribed level, said control device instructing said voltage converting unit to perform a voltage converting operation such that said second electric storage device is charged from said first electric storage, and said first electric storage device has a larger maximum chargeable electric power than said second electric storage device. - View Dependent Claims (16, 17)
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18. A method of controlling a power supply device for a vehicle, the power supply device including first and second electric storage devices, a first rotating electric machine driving a wheel, and a selection switch selecting one of said first and second electric storage devices and connecting the selected electric storage device to said first rotating electric machine, comprising the steps of:
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determining whether or not charging is performed when said selection switch selects said first electric storage device; determining whether or not a state of charge of said first electric storage device is higher than a first prescribed level; and instructing said selection switch to select said second electric storage device when the state of charge of said first electric storage device becomes higher than the first prescribed level. - View Dependent Claims (19)
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20. A method of controlling a power supply device for a vehicle, the power supply device including first and second electric storage devices, a first rotating electric machine receiving electric power from said first electric storage device and driving a wheel, and a voltage converting unit provided between said first and second electric storage devices and receiving and transferring electric power between said first and second electric storage devices, comprising the steps of:
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determining whether or not charging of said first electric storage device is performed; determining whether or not a state of charge of said first electric storage device becomes higher than a first prescribed level; instructing said voltage converting unit to perform a voltage converting operation such that said second electric storage device is charged from said first electric storage device when the state of charge of said first electric storage device becomes higher than the first prescribed level; determining when energy in said first electric storage device is consumed such that the state of charge of said first electric storage device becomes lower than a second prescribed level; and instructing said voltage converting unit to perform the voltage converting operation such that said first electric storage device is charged from said second electric storage device. - View Dependent Claims (21)
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22. A method of controlling a power supply device for a vehicle, the power supply device including first and second electric storage devices, a first rotating electric machine receiving electric power from said first electric storage device and driving a wheel, and a voltage converting unit provided between said first and second electric storage devices and receiving and transferring electric power between said first and second electric storage devices, wherein said first electric storage device has a larger maximum chargeable electric power than said second electric storage device, comprising the steps of:
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determining whether or not a state of charge of said first electric storage device becomes higher than a first prescribed level when charging of said first electric storage device is performed; instructing said voltage converting unit to perform a voltage converting operation such that said second electric storage device is charged from said first electric storage device when the state of charge of said first electric storage device becomes higher than the first prescribed level.
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Specification