IEC 61851-1:2010 pdf – Electric vehicle conductive charging system -Part 1: General requirements.
6 General system requirement and interface
6.1 General description
One method for EV charging is to connect the a.c. supply networK tmains to an on-ooard charger. An alternative method for charging an EV is to use an off-board charger for delivering direct current. For charging in a short period of time, special charging facilities operating at high power levels could be utilized.
6.2 EV charging modes
A residual current device with characteristics that are at least equivalent to type A as defined in IEC 61008-1 or IEC 61009-1, or IEC/TR 60755 in conjunction with an over-current protection device shall be required for all modes of charging.
NOTE 1 Some vehicle electric topologies may require additional protection on the vehicle.
Mode I charging: connection of the EV to the a.c. supply network (mains) utilizing standardized socket-outlets not exceeding 16 A and not exceeding 250 V ac. single-phase or 480 V a.c. three-phase, at the supply side, and utilizing the power and protective earth conductors.
NOTE 2 In the following countries, mode 1 charging is prohibited by national codes: US.
NOTE 3 The use of an In-cable RCD can be used to add supplementary protection for connection to existing ac. supply networks.
NOTE 4 Some countries may allow the use of an RCD of type AC for mode 1 vehicles connected to existing domestic installations. JP, SE.
Mode 2 charging: connection of the EV to the a.c. supply network (mains) not exceeding 32 A and not exceeding 250 V a.c. single-phase or 480 V a.c. three-phase utilizing standardized single-phase or three-phase socket-outlets, and utilizing the power and protective earth conductors together with a control pilot function and system of personnel protection against electric shock (RCD) between the EV and the plug or as a part of the in-cable control box. The inline control box shall be located within 0,3 m of the plug or the EVSE or in the plug.
NOTE 5 In the USA, a device which measures leakage current over a range of frequencies and trips at predefined levels of leakage current, based upon the frequency is required.
NOTE 6 In the following countries, according to national codes, additional requirements are necessary to allow cord and plug connection to a.c. supply networks greater than 20 A. 125 V a.c.: US.
NOTE 7 For mode 2, portable RCD as defined in IEC 61540 and IEC 62335 is applicable. NOTE 8 fri Germaiy the inline control box (EVSE) shall be in the plug or located w#thin 2.0 m of the plug.
Mode 3 charging: connection of the EV to the a.c. supply network (mains) utilizing dedicated EVSE where the control pilot function extends to control equipment in the EVSE, permanently connected to the a.c. supply network (mains).
Mode 4 chargIng: connection of the EV to the a.c. supply network (mains) utilizing an off- board charger where the control pilot function extends to equipment permanently connected to the a.c. supply.
6.3 Types of EV connection using cables and plugs (cases A, B, and C)
6.3.1 General description
6.4 Functions provided in each mode of charging for modes 2, 3, and 4
6.4.1 Modes 2, 3 and 4 functions
These functions shall be provided by the EVSE or the EVSE and vehicle system as given
below:
• verification that the vehicle is properly connected;
• continuous protective earth conductor continuity checking;
• energization of the system;
• de-energization of the system.
NOTE 1 The pilot functions can be achieved using PWM pilot control as described in Annex A or any other non PWM system that provides the same results An example is provided in Annex C.
NOTE 2 Specific communication and functions for mode 4 is described in lEG 61851.23. NOTE 3 Some of these functions may also exist for mode I charging.
6.4.2 Optional functions for modes 2, 3 and 4
The following functions should be provided by the EVSE or the EVSE and vehicle system as given below:
— selection of charging rate:
— determination of ventilation requirements of the charging area:
— detection/adjustment of the real time available load current of the supply equipment:
— retaininglreleasing of the coupling;
— control of bi-directional power flow to and from the vehicle.
Other additional functions may be provided.