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US 9,283,855 B2Granted
Power management apparatus, power management method, and power management system
AssigneeMitsubishi Electric Corporation
InventorsNozomu Kamioka, Satoshi Wachi, Yasukazu Murata
Life of this patent
Estimating the term…
Abstract
The power management apparatus provided in a vehicle includes: a switch 6 for bringing a state between the first and second electric power storage devices 1 and 2 into a non-conduction state during a normal operation and switching the state therebetween to a conduction state when a failure of the power converter 4 is detected; and a power management section 7 for controlling the motor-generator 3 so that a difference between voltages of the first and second electric power storage devices 1 and 2 is equal to or smaller than a predetermined voltage difference before the switch 6 is operated to perform switching from the non-conduction state to the conduction state.
Claims12
A power management apparatus provided in a vehicle including:
- a first circuit including a first electric power storage device;
- a second circuit including a second electric power storage device;
- a power converter for converting power of the first electric power storage device to supply the converted power to the second electric power storage device and an electric apparatus of the vehicle;
- and a motor-generator connected to the first electric power storage device, the power management apparatus comprising:
- a switch connected between the first circuit and the second circuit and provided separately from the power converter, for bringing a state between the first circuit and the second circuit into a non-conduction state during a normal operation of the power converter and switching the state between the first circuit and the second circuit from the non-conduction state to a conduction state when a failure of the power converter is detected;
- and
- a power management section for controlling the motor-generator so that a difference between a voltage of the first electric power storage device and a voltage of the second electric power storage device is equal to or smaller than a first predetermined voltage difference before the switch is operated to switch the state between the first circuit and the second circuit from the non-conduction state to the conduction state.
4 more elements
A power management system, comprising:
- a first circuit including a first electric power storage device;
- a second circuit including a second electric power storage device;
- a power converter for converting power of the first electric power storage device to supply the converted power to the second electric power storage device and an electric apparatus of a vehicle;
- a motor-generator connected to the first electric power storage device;
- a switch connected between the first circuit and the second circuit and separately provided from the power converter, for bringing a state between the first circuit and the second circuit into a non-conduction state during a normal operation of the power converter and switching the state between the first circuit and the second circuit from the non-conduction state to a conduction state when a failure of the power converter is detected;
- and
- a power management section for controlling the motor-generator so that a difference between a voltage of the first electric power storage device and a voltage of the second electric power storage device is equal to or smaller than a first predetermined voltage difference before the switch is operated to switch the state between the first circuit and the second circuit from the non-conduction state to the conduction state.
4 more elements
A power management method carried out in a vehicle including:
- a first circuit including a first electric power storage device;
- a second circuit including a second electric power storage device;
- a power converter for converting power of the first electric power storage device to supply the converted power to the second electric power storage device and an electric apparatus of the vehicle;
- and a motor-generator connected to the first electric power storage device, the power management method comprising:
- operating a switch provided between the first circuit and the second circuit and separately provided from the power converter to achieve a non-conduction state between the first circuit and the second circuit while the power converter operates normally;
- detecting a failure of the power converter when the failure occurs in the power converter;
- controlling the motor-generator so that a difference between a voltage of the first electric power storage device and a voltage of the second electric power storage device becomes equal to or smaller than a first predetermined voltage difference when the failure is detected;
- and
- operating the switch to switch the state between the first circuit and the second circuit from the non-conduction state to a conduction state when the difference between the voltage of the first electric power storage device and the voltage of the second electric power storage device becomes equal to or smaller than the first predetermined voltage difference.
6 more elements
Dependencies are inferred from the claim text.