IEC 61851-25-2020 Electric vehicle conductive charging system – Part 25: DC EV supply equipment where protection relies on electrical separation.
4 General requirements
Clause 4 of IEC 61 851 -1 :201 7 is applicable.
5 Classification
Clause 5 of IEC 61 851 -1 :201 7 is applicable, except as follows.
5.1.2 Characteristics of power supply output
Replacement:
The EV supply equipment shall be classified as DC EV supply equipment.
5.6 Protection against electric shock
Subclause 5.6 of IEC 61 851 -1 :201 7 is not applicable.
5.7 Charging modes
Subclause 5.7 of IEC 61 851 -1 :201 7 is not applicable.
6 Charging modes and functions
Clause 6 of IEC 61 851 -1 :201 7 is applicable, except as follows.
6.1 General
Replacement:
Clause 6 describes the functions for energy transfer to EVs.
6.2 Charging modes
Subclause 6.2 of IEC 61 851 -1 :201 7 is not applicable.
6.3 Functions provided in Mode 2, 3 and 4
Subclause 6.3 of IEC 61 851 -1 :201 7 is replaced by the following:
6.3 Mandatory functions
6.3.1 General
The DC EV supply equipment shall supply a DC output current to the EV in accordance with the requested DC output current parameter from the EV, subject to the requirements of the mandatory functions as indicated below.
NOTE The DC EV supply equipment acts as a slave to the EV. Further details are given in Annex AA, Annex BB and Annex EE.
The following functions shall be provided by the DC EV supply equipment:
• verification that the EV is properly connected to the DC EV supply equipment in accordance with 6.3.2;
• verification of the latching of the vehicle coupler in accordance with 6.3.3;
• latching and unlatching of the vehicle coupler in accordance with 6.3.4;
• communication with the vehicle in accordance with 6.3.5;
• monitoring of the continuity of the control pilot circuit in accordance with 6.3.6;
• verification function before energy transfer in accordance with 6.3.7;
• energization and control of the power supply to the EV in accordance with 6.3.8;
• protection against overvoltage in accordance with 6.3.9;
• de-energization of the power supply to the EV in accordance with 6.3.1 0;
• shutdown of DC EV supply equipment in accordance with 6.3.1 0.2, 6.3.1 0.3 and 6.3.1 0.4.
Values, timing and tolerances for the DC output current and the DC output voltages shall be tested in accordance with Annex BB.
6.3.2 Verification that the EV is properly connected to the DC EV supply equipment
The DC EV supply equipment shall determine that the EV is properly connected to the DC EV supply equipment.
Proper connection is assumed when the continuity of the control pilot circuit is detected.
Compliance is checked in accordance with DD.3.1.
6.3.3 Verification of the latching of the vehicle coupler
The DC EV supply equipment shall determine that the vehicle connector is properly latched to the vehicle inlet.
The DC EV supply equipment shall not energize the conductors in the cable assembly when the vehicle connector is not latched to a vehicle inlet.
The DC EV supply equipment shall enter into an emergency shutdown if the vehicle connector is disconnected from the vehicle inlet while under power.
Compliance is checked in accordance with DD.3.8.6.
6.3.4 Latching and unlatching of the vehicle coupler
A mechanical or electromechanical means shall be provided to prevent intentional and unintentional disconnection under load of the vehicle connector according to IEC 621 96-1 .
Compliance is checked by inspection.
6.3.5 Communication with the EV
6.3.5.1 General
Digital communication shall be established between the EV and the DC EV supply equipment to validate and control the energy transfer.
The DC EV supply equipment shall be able to receive and interpret all mandatory digital communication data as described in Annex FF.
Compliance is checked in accordance with Clause DD.3.
The vehicle connector shall not be energized until the compatibility assessment is successfully completed in accordance with 6.3.7.2.
Compliance is checked by the test in Annex DD applying the messages defined in Table FF.2 and Table FF.3 of Annex FF.IEC 61851-25 pdf download.