Method for determining the absence of voltage in an electrical high-voltage system, and electrical high-voltage system
First Claim
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1. A method for checking safe isolation of a low-voltage electrical distribution system from a high-voltage power supply in a high-voltage electrical system in an electric or hybrid vehicle, the method comprising:
- using at least two of a plurality of control devices in the high-voltage system to detect, independently of one another, a voltage on high-voltage lines in the high-voltage system and indicate whether the respectively measured voltages are above or below a threshold voltage value or whether a fault has occurred in the measurement;
determining whether there is safe isolation of the low-voltage electrical distribution system from the high-voltage power supply using the at least two of the plurality of control devices based on the detected voltage on the high-voltage lines in the high-voltage system measured by the at least two of the plurality of control devices; and
displaying an indication of the determined safe isolation of the low-voltage electrical distribution system from the high-voltage power supply on at least one display unit, wherein the displaying of the indication of the determined safe isolation is performed only in response to and based on the determination of the safe isolation performed based on the at least two of the plurality of control devices all detecting a voltage below the threshold voltage value.
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Abstract
A method for determining the absence of voltage in an electrical high-voltage system, in particular in an electric or hybrid vehicle, by using at least two control units in the high-voltage system and at least one display unit, wherein the control units detect the voltage in the high-voltage system independently of one another, wherein an absence of voltage is displayed on the display unit only if both control units detect a voltage below a threshold value. Also disclosed is an electrical high-voltage system.
9 Citations
15 Claims
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1. A method for checking safe isolation of a low-voltage electrical distribution system from a high-voltage power supply in a high-voltage electrical system in an electric or hybrid vehicle, the method comprising:
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using at least two of a plurality of control devices in the high-voltage system to detect, independently of one another, a voltage on high-voltage lines in the high-voltage system and indicate whether the respectively measured voltages are above or below a threshold voltage value or whether a fault has occurred in the measurement; determining whether there is safe isolation of the low-voltage electrical distribution system from the high-voltage power supply using the at least two of the plurality of control devices based on the detected voltage on the high-voltage lines in the high-voltage system measured by the at least two of the plurality of control devices; and displaying an indication of the determined safe isolation of the low-voltage electrical distribution system from the high-voltage power supply on at least one display unit, wherein the displaying of the indication of the determined safe isolation is performed only in response to and based on the determination of the safe isolation performed based on the at least two of the plurality of control devices all detecting a voltage below the threshold voltage value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A high-voltage electrical system, in an electric or hybrid vehicle, the high voltage electrical system comprising:
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an electric drive including a high-voltage power supply and a low-voltage electrical distribution system for the vehicle, wherein the high-voltage power supply is galvanically isolated from the vehicle'"'"'s low-voltage electrical distribution system and the high-voltage power supply includes a high-capacity electric battery; at least two of a plurality of control devices that detect, independently of one another, a voltage on high-voltage lines in the high-voltage electrical system and indicate whether the respectively measured voltages are above or below a threshold voltage value or if a fault has occurred in the measurement; and at least one display unit, wherein the at least two of the plurality of control devices detect, independently of one another, a voltage in the high-voltage system, wherein there is a determination of safe isolation of the low-voltage electrical distribution system from the high-voltage power supply based on the detected voltage on the high-voltage lines in the high-voltage system measured by the at least two of the plurality of control devices, and wherein an indication of the determined safe isolation of the low-voltage electrical distribution system from the high-voltage power supply is displayed on the at least one display unit, wherein the indication of the determined safe isolation is displayed only in response to and based on the determination of the safe isolation performed based on the at least two of the plurality of control devices all detect a voltage below the threshold voltage value. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for checking safe isolation of a low-voltage electrical distribution system from a high-voltage power supply in a high-voltage electrical system in an electric or hybrid vehicle, the method comprising:
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using at least two of a plurality of control devices in the high-voltage system to detect, independently of one another, a state value indicating a voltage on high-voltage lines is above or below a threshold voltage value in the high-voltage system or whether a fault has occurred in the measurement, wherein one of the plurality of control devices is a control device of a charge manager detecting a plug state of at least one electrical socket outlet; determining whether there is safe isolation of the low-voltage electrical distribution system from the high-voltage power supply using the at least two of the plurality of control devices based on the detected state values indicating a voltage on the high-voltage lines is below a threshold value; and displaying an indication of the determined safe isolation of the low-voltage electrical distribution system from the high-voltage power supply on at least one display unit, wherein the displaying of the indication of the determined safe isolation is performed only in response to and based on the determination of the safe isolation performed based on the at least two of the plurality of control devices all detecting a state value indicating a voltage below the threshold voltage value and the control device of the charge manager of the plurality of control devices detects no charging plug inserted in the at least one electrical socket outlet.
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Specification