Protective earth (PE) loss detection
A Protective Earth (PE) loss detection method for charging an electrical vehicle is provided. The electrical vehicle comprises an Electrical Vehicle Supply Equipment (EVSE), a charging connector, and/or a charging cable comprising at least a Proximity Pilot (PP) line for a PP signal, a Control Pilot (CP) line for a CP signal and a PE line for a PE signal. The method comprises detecting interruption of the PE line by observing a change of the PP signal.
1. A Protective Earth (PE) loss detection method for charging an electrical vehicle comprising an Electrical Vehicle Supply Equipment (EVSE), a charging connector, and/or a charging cable comprising at least a Proximity Pilot (PP) line for a PP signal, a Control Pilot (CP) line for a CP signal and a PE line for a PE signal, the method comprising:
detecting interruption of the PE line by observing a change of the PP signal wherein the change comprises a different direct current (DC) level of ≤40, 50 or 60% of a DC level of an uninterrupted PE line.
2. The PE loss detection method of claim 1 , wherein the change further comprises an alternating current (AC) component and/or a pulse width modulated (PWM) signal.
3. The PE loss detection method of claim 2 , wherein the AC component and/or the PWM signal comprises a peak to peak amplitude of ≥0.1 V or ≥0.3 V and ≤0.3 V, ≤0.4 V or ≤0.6 V or comprises a peak to peak amplitude of ≥0.4 V or ≥1.0 V and ≤1.2 V, ≤1.6 V or ≤2.0 V.
4. The PE loss detection method of claim 2 , wherein the AC component and/or PWM signal comprises a frequency in the range of 1 kHz or a frequency ≥0.9 kHz and ≤1.1 kHz.
5. The PE loss detection method of claim 1 , wherein a charging protocol for the electrical vehicle is according to International Electrotechnical Commission (IEC) 61851.
6. The PE loss detection method of claim 5 , wherein the charging protocol for the electrical vehicle is according to International Electrotechnical Commission (IEC) 61851-23.
7. The PE loss detection method of claim 1 , wherein the charging connector is provided according to International Electrotechnical Commission (IEC) 62196.
8. The PE loss detection method of claim 1 , wherein the method further comprises:
charging the electrical vehicle with electrical energy.
9. The PE loss detection method of claim 1 , wherein the method further comprises:
based on detecting interruption of the PE line, providing a notification of the detected interruption of the PE line; and/or
based on detecting interruption of the PE line, stop charging the electrical vehicle.
10. The PE loss detection method of claim 1 , wherein the method further comprises:
based on the observed change, determining whether the EVSE is charging or is not charging the electrical vehicle.
11. The PE loss detection method of claim 1 , wherein the method further comprises:
charging the electrical vehicle with electrical energy;
based on detecting interruption of the PE line, stop charging the electrical vehicle; and
based on the observed change, determining whether the EVSE is charging or is not charging the electrical vehicle.
12. The PE loss detection method of claim 11 , wherein charging is stopped within 30 milliseconds from detection of the interruption.
13. The PE loss detection method of claim 1 , wherein the method further comprises:
detecting interruption of the PE line by observing a change of the CP signal.
14. The PE loss detection method of claim 1 , wherein the charging connector is configured to detect a PE loss.
15. The PE loss detection method of claim 1 , wherein the charging cable is configured to detect a PE loss.
16. The PE loss detection method of claim 1 , wherein the EVSE is configured to detecting a PE loss.
17. The PE loss detection method of claim 1 , wherein the charging connector is provided according to the International Electrotechnical Commission (IEC) 62196 standard.
18. A Protective Earth (PE) loss detection method for charging an electrical vehicle comprising an Electrical Vehicle Supply Equipment (EVSE), a charging connector, and a charging cable comprising at least a Proximity Pilot (PP) line for a PP signal, a Control Pilot (CP) line for a CP signal and a PE line for a PE signal, the method comprising:
detecting interruption of the PE line by observing a change of the PP signal while the CP line is uninterrupted, wherein the change comprises a different direct current (DC) level of ≤0.3 V, ≤0.4 V or ≤0.6 V using a CCS1 protocol or of ≤1.2 V, ≤1.6 V or ≤2.0 V using a CCS2 protocol.
19. The PE loss detection method of claim 18 , wherein the method further comprises:
based on detecting interruption of the PE line, providing a notification of the detected interruption of the PE line; and/or
based on detecting interruption of the PE line, stop charging the electrical vehicle.
20. A Protective Earth (PE) loss detection method for charging an electrical vehicle comprising an Electrical Vehicle Supply Equipment (EVSE), a charging connector, and a charging cable comprising at least a Proximity Pilot (PP) line for a PP signal, a Control Pilot (CP) line for a CP signal and a PE line for a PE signal, the method comprising:
detecting interruption of the PE line by observing a change of the PP signal while the CP line is uninterrupted, wherein the change comprises:
a different direct current (DC) level, which is ≤60% of a DC level of an uninterrupted PE line, or
an alternating current (AC) component and/or a pulse width modulated (PWM) signal.
21. The PE loss detection method of claim 20 , wherein the method further comprises:
based on detecting interruption of the PE line, providing a notification of the detected interruption of the PE line; and/or
based on detecting interruption of the PE line, stop charging the electrical vehicle.