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Device and method for monitoring an electrical insulation in a vehicle electrical system

A technology of power supply and electrical insulation, applied in the field of hybrid electric vehicles/electric vehicles, can solve the problem of insufficient electrical insulation

Inactive Publication Date: 2016-11-09
CONTINENTAL AUTOMOTIVE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, if the electrical insulation is not sufficiently high, fault currents with a current intensity of a few milliamperes, which may be life-threatening for humans, can flow through the human body

Method used

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  • Device and method for monitoring an electrical insulation in a vehicle electrical system
  • Device and method for monitoring an electrical insulation in a vehicle electrical system
  • Device and method for monitoring an electrical insulation in a vehicle electrical system

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Embodiment Construction

[0066] first refer to figure 1 ,exist figure 1 The on-board electrical supply system BN of an electric vehicle, not shown in the drawing, is schematically shown, which has a device V for monitoring the electrical insulation in the on-board electrical supply system.

[0067] The on-board electrical supply system BN comprises a high-voltage on-board electrical supply system branch HZ in which an operating voltage of approximately 500 volts is present. This branch HZ of the high-voltage vehicle-mounted power supply system is used to provide current for the motor EM in the branch HZ of the high-voltage vehicle-mounted power supply system, and the motor is used to drive the electric vehicle.

[0068] In this branch HZ of the high-voltage on-board power supply system, the on-board power supply system BN has a traction battery BT as an energy source or power supply, which provides the power required for operating the electric machine EM or for driving the electric vehicle. required...

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Abstract

The invention relates to a device (V) for monitoring an electrical insulation in the case of a vehicle electrical system (BN) of a vehicle, comprising: a voltage source (SQ) for generating direct voltages having a first (Uq1) and a second (Uq2) voltage value; a voltage-measuring unit (ME1) between a positive (LP) and a negative (LN) power supply line of the vehicle electrical system (BN) for measuring a voltage (Ub) between the positive (LP) and the negative (LN) power supply line; a current path (P) between a positive current connection (AP) of the voltage source (SQ) and the positive (LP) power supply line; a current-measuring unit (ME2) in the current path (P) for measuring a current (I) flowing through the current path (P); a determining unit (EE) designed to determine an insulation resistance (R_ISO) between the vehicle electrical system (BN) and an electrical ground (MA) from voltage measurement values (Ub1, Ub2) of the voltage-measuring unit (MEI), current measurement values (I1, I2) of the current-measuring unit (ME2), and the first (Uq1) and the second (Uq2) voltage value.

Description

technical field [0001] The invention relates to a device and a method for monitoring electrical insulation in an on-board electrical supply system of a vehicle, in particular a hybrid / electric vehicle. Furthermore, the invention relates to an on-board power supply system for a vehicle and a vehicle, in particular a hybrid / electric vehicle, having an on-board power supply system, wherein the on-board power supply system comprises the above-mentioned device. Background technique [0002] Modern vehicles, in particular hybrid or electric vehicles, have an on-board power supply system comprising a high-voltage on-board power supply system branch in which operating voltages of several hundred volts are present . [0003] However, voltages exceeding 60 volts are life-threatening to people, especially children. Therefore, the high-voltage on-board power supply branch with an operating voltage of more than 60 volts is electrically insulated from the rest of the on-board power supp...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R31/02
CPCG01R31/006G01R31/52B60L3/04B60L50/40B60L50/51B60L3/0069Y02T10/70G01R31/14
Inventor L.施梅尔策
Owner CONTINENTAL AUTOMOTIVE GMBH
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