Method for operating a vehicle-external charging device for charging a vehicle and charging device

Patent metadata

Field	Value
Publication number	US-2022105822-A1
Application number	US-202117494178-A
Country	US
Kind code	A1
Filing date	Oct 5, 2021
Priority date	Oct 5, 2020
Publication date	Apr 7, 2022
Grant date	—

Abstract

A method is provided for operating a vehicle-external charging device (1) for charging an electric or hybrid vehicle. The method checks an electrical connection of an insulation monitor (3) between a contactor (4) of the charging device (1) and a charging cable (5) of the charging device (1) when the contactor (4) is in a closed switching state and also uses the insulation monitor to check an electrical insulation of the charging cable (5) when the contactor (4) is in an open switching state. A charging device (1) also is provided.

First claim

What is claimed is:

1 . A method for operating a vehicle-external charging device for charging an electric or hybrid vehicle, the method comprising: checking an electrical connection of an insulation monitor that is connected between a contactor of the charging device and a charging cable of the charging device when the contactor is in a closed switching state; and using the insulation monitor to check an electrical insulation of the charging cable when the contactor is in an open switching state.

2 . The method of claim 1 , wherein the correct connection of the insulation monitor is checked by the insulation monitor.

3 . The method of claim 1 , wherein the switching state of the contactor is transmitted from a positively driven auxiliary contact of the contactor via a signal line to the insulation monitor.

4 . The method of claim 1 , wherein the switching state of the contactor is transmitted from a control computer of the charging device to the insulation monitor.

5 . The method of claim 1 , further comprising using the insulation monitor to check an electrical insulation of the charging device between the contactor and a power electronics system when the contactor is in an open switching state.

6 . The method of claim 5 , further comprising checking a further electrical connection of the insulation monitor between the contactor and the power electronics system when the contactor is in an open switching state.

7 . The method of claim 5 , further comprising checking the electrical insulation of the charging cable at first connections of the insulation monitor, checking the electrical insulation of the charging device between the contactor and the power electronics system at second connections of the insulation monitor, and in the closed switching state of the contactor comparing measurement values at the first connections with measurement values at the second connections.

8 . The method of claim 1 , further comprising using the insulation monitor to monitor a voltage between electrical lines of the charging cable and to monitor a further voltage between electrical lines between the contactor and the power electronics system.

9 . The method of claim 1 , wherein the steps of checking the electrical connection of the insulation monitor and checking the electrical insulation of the charging cable are carried out based on reference values, wherein the reference values are provided to the insulation monitor as a value matrix and are updated in the event of a charging process.

10 . A charging device for charging an electric or hybrid vehicle, the charging device comprising: a contactor; a charging cable and an insulation monitor that is connected between the contactor and the charging cable, the insulation monitor being configured to check an electrical connection of the insulation monitor to the contactor and to the charging cable when the contactor is in a closed switching state and to check an electrical insulation of the charging cable when the contactor is in an open switching state.

11 . The charging device of claim 10 , wherein the insulation monitor further is connected between the contactor and a power electronics system of the charging device.

Assignees

• Porsche Ag

Inventors

• Heyne Raoul
• Jankovic Marija

Classifications

• H02J7/751

  concerning the insertion or the connection of the batteries · CPC title

• H02J7/80

  including monitoring or indicating arrangements · CPC title

• H02J7/62

  against overcurrent · CPC title

• Y02T90/12

  Electric charging stations · CPC title

• Y02T10/7072

  Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors · CPC title