Vehicle Comprising a Battery Drive and a Method for Operating a Vehicle of this Type
First Claim
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1. A vehicle comprising:
- an electric drive adapted to receive operating power from an external electric supply system, a battery located at the vehicle, the battery having a rated voltage which is less than or equal to 10% of voltage of the external electric supply system; and
a control unit for actuating the electric drive;
wherein;
the electric drive is configured to operate with the voltage of the external electric supply system and can be supplied by and is configured to be operated by the battery when the external electric supply system is disconnected or fails, and the battery being operable for supplying the on-board electrical supply system of the vehicle for functions other than traction in a normal operating mode of the electric drive during which the drive is being supplied by an external electric supply system, the electric drive comprises a power unit, and an electric motor connected to the power unit, and the power unit comprises a power inverter, the control unit is operative to compensate voltage drops at the power inverter when the electric drive is operated by the battery.
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Abstract
Electrically driven passenger transport vehicles are supplied with energy by an external electric supply network. If the external energy supply fails, vehicles of this type require special auxiliary devices that do not rely on the supply network, for example rely on auxiliary vehicles, in order to move said vehicles again. A vehicle can move independently during a failure of the external energy supply, by switching the electric drive of said vehicle to a battery drive.
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Citations
19 Claims
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1. A vehicle comprising:
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an electric drive adapted to receive operating power from an external electric supply system, a battery located at the vehicle, the battery having a rated voltage which is less than or equal to 10% of voltage of the external electric supply system; and
a control unit for actuating the electric drive;
wherein;
the electric drive is configured to operate with the voltage of the external electric supply system and can be supplied by and is configured to be operated by the battery when the external electric supply system is disconnected or fails, and the battery being operable for supplying the on-board electrical supply system of the vehicle for functions other than traction in a normal operating mode of the electric drive during which the drive is being supplied by an external electric supply system, the electric drive comprises a power unit, and an electric motor connected to the power unit, and the power unit comprises a power inverter, the control unit is operative to compensate voltage drops at the power inverter when the electric drive is operated by the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for operating a vehicle having an electric drive which is adapted to receive operating power from an external electric supply system and which is configured with respect to the voltage of the external electric supply system wherein the electric drive comprises an electric motor coupled to drive the vehicle, and a power unit including a power inverter which provides power to, and controls the motor, the method comprising:
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connecting the power unit to the external electric supply system to provide operating power for the motor during a normal operating mode for the electric drive;
switching the electric drive over to an on-board battery operating mode when the external electric supply system is disconnected or fails, wherein the voltage of the battery is less than or equal to 10% of the external supply system voltage, and the battery supplies power for the on-board electrical supply system of the vehicle in the normal operating mode;
adjusting the electric drive to compensate voltage drops at the power inverter when the power unit is supplied by the battery; and
operating the adjusted electric drive on the battery voltage. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method for retrofitting a vehicle having an electric drive which is adapted to receive operating power from an external electric supply system, the method comprising:
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providing a battery on the vehicle having a rated voltage which is less than or equal to 10% of voltage of the external electric supply system if one is not already present, the battery being operable for supplying the on-board electrical supply system of the vehicle in a normal operating mode of the electric drive in which mode, the drive is supplied by an external electric supply system;
connecting a circuit breaker located on the vehicle to selectably provide power from the battery to a power unit of the electric drive, wherein the power unit comprises a power inverter; and
replacing or updating a control unit for actuating the power unit of the electric drive to compensate voltage drops at the power inverter when the electric drive is operated by the battery. - View Dependent Claims (18, 19)
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Specification