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GB/T 18487.1-2023 English PDF (GBT18487.1-2023)

GB/T 18487.1-2023 English PDF (GBT18487.1-2023)

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GB/T 18487.1-2023: Electric vehicle conductive charging system - Part 1: General requirements

This document specifies classification, general requirements, communication, electric shock protection, connection between electric vehicle and EV energy transfer equipment, special requirements of vehicle adaptor, vehicle coupler and EV plug and socket-outlet, EV energy transfer equipment structure requirement, performance requirement, overload protection and short circuit protection, emergency stop, service conditions, repair, marking and description for electric vehicle conductive charging system. Note 1: Where no confusion is caused, the ????EV energy transfer equipment???? in this document is referred to as ????supply equipment????. This document is applicable to current-controlled and/or voltage-controlled off-board conductive power supply equipment to achieve one-way/two-way energy flow between the electric vehicle rechargeable electrical energy storage system and the power supply network (power supply). The rated voltage of the power supply network side (side A) does not exceed 1 000 V AC or 1 500 V DC, and the rated maximum voltage of the electric vehicle
GB/T 18487.1-2023
ChaoJi-1 (Chinese standard GB/T) and compatible CHAdeMO-3.1 (Japanese standard, joint-development with Chinese standard) are consisted of GB/T 18487.1-2023, GB/T27930-2023, and GB/T 20234.4-2023. It is suitable for high, medium and low power charging (up to 1.2MW) to meet the needs of safe and fast electric-vehicle charging.
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 43.040.99
CCS T 35
Replacing GB/T 18487.1-2015
Electric vehicle conductive charging system - Part 1:
General requirements
ISSUED ON: SEPTEMBER 07, 2023
IMPLEMENTED ON: APRIL 01, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of China.
Table of Contents
Foreword ... 4
Introduction ... 11
1 Scope ... 13
2 Normative references ... 14
3 Terms and definitions ... 17
4 Classification ... 47
5 General requirements for charging system ... 50
6 Communication ... 54
7 Electric shock protection ... 55
8 Connection between electric vehicle and EV energy transfer ... 62
9 Vehicle adaptor ... 64
10 Special requirements for vehicle coupler and EV plug and socket-outlet ... 64 11 Structure requirements for EV energy transfer equipment ... 67
12 Performance requirements for EV energy transfer equipment ... 73
13 Overload protection and short circuit protection ... 78
14 Emergency stop ... 79
15 Service condition ... 79
16 Maintenance and repair ... 81
17 Marking and description ... 81
Appendix A (Normative) AC charging control pilot circuit and control principle ... 83 Appendix B (Normative) DC charging control pilot circuit and control principle of connection set for charging in GB/T 20234.3 ... 115
Appendix C (Normative) DC charging control pilot circuit and control principle of connection set for charging in GB/T 20234.4 ... 129
Appendix D (Informative) Vehicle power supply circuit voltage adaptability switching ... 171
Appendix E (Informative) V2G DC bi-directional charging technical solution using the connection set for charging specified in GB/T 20234.4 ... 175
Appendix F (Normative) DC charging technology for multi-vehicle couplers ... 182 Appendix G (Normative) Technical solution on DC charging compatibility using vehicle adapter specified in GB/T 20234.4 ... 187
Electric vehicle conductive charging system - Part 1:
General requirements
1 Scope
This document specifies classification, general requirements, communication, electric shock protection, connection between electric vehicle and EV energy transfer equipment, special requirements of vehicle adaptor, vehicle coupler and EV plug and socket-outlet, EV energy transfer equipment structure requirement, performance requirement, overload protection and short circuit protection, emergency stop, service conditions, repair, marking and description for electric vehicle conductive charging system.
Note 1: Where no confusion is caused, the ?€?EV energy transfer equipment?€? in this document is referred to as ?€?supply equipment?€?.
This document is applicable to current-controlled and/or voltage-controlled off-board conductive power supply equipment to achieve one-way/two-way energy flow between the electric vehicle rechargeable electrical energy storage system and the power supply network (power supply). The rated voltage of the power supply network side (side A) does not exceed 1 000 V AC or 1 500 V DC, and the rated maximum voltage of the electric vehicle side (side B) does not exceed 1000 V AC or 1 500 V DC. This document is also applicable to EV supply equipment which acquires energy from onsite energy storage system (such as buffer battery).
This document applies to conductive charging or bi-directional charging systems of electric vehicles that can be externally charged or bi-directional charged, including battery electric vehicles, off-vehicle-chargeable hybrid electric vehicles and fuel cell hybrid electric vehicles.
It also applies, as a reference, to conductive charging or bi-directional charging systems of trams, railway vehicles, industrial vehicles, etc.
This document is not applicable to safety requirements on maintenance of electric vehicle conductive charging/bi-directional charging system, or to the on-board charging equipment as specified in GB/T 40432, or to trolleybus.
Refer to the relevant standards of electric vehicles for requirements for components other than the key components of electric vehicle specified in this document (vehicle side vehicle inlet, control pilot circuit, EV disconnection device).
-- mode 3;
-- mode 4.
Note: More than one charging mode may coexist on the same EV supply equipment. 5 General requirements for charging system
5.1 Service conditions of electric vehicle charging mode
5.1.1 Mode 1
Mode 1 charging system uses standard plug to connect standard socket-outlet and shall adopt single-stage AC power supply not greater than 8 A and 250 V during energy transmission. The plug and socket-outlet conforming to GB 2099.1 and GB 1002 shall be used at the supply side. stage line, neutral line and protective earthing conductor as well as residual current protective device are used at the supply side. Protective earthing conductor shall be provided from standard socket-outlet to electric vehicle. Mode 1 shall not be used to charge electric vehicle.
5.1.2 Mode 2
Mode 2 charging system uses standard plug to connect standard socket-outlet and shall adopt single-stage AC power supply during energy transmission. When 10 A standard plugs and socket-outlets conforming to GB 2099.1 and GB 1002 or NB/T 10202 are used at the supply side, the output shall not exceed 8 A. When plugs and socket-outlets conforming to GB/T 11918.1 and GB/T 11918.2 are used at the supply side, the output shall not exceed 32 A. Single-stage two-pole plugs and socket-outlets specified in GB/T 1002 shall not be used on the power side. Properly installed standard socket-outlets including stage lines, neutral wires and protective earthing conductors shall be used at the power supply side, and in-cable control and protection devices (IC-CPDs) shall be used to connect the power supply network (power supply) and the electric vehicle. It includes plugs that integrate additional functions such as temperature detection, residual current protection, switching, etc., the rest of which complies with the requirements of the above standards, and meets the test requirements of relevant standards. Protective earthing conductor having residual current protection and overcurrent protection functions shall be provided from standard socket-outlet to electric vehicle. The control pilot function of mode 2 shall comply with Appendix A.
5.1.3 Mode 3
Mode 3 is applicable to that the power supply equipment connected to AC supply network connects electric vehicle and AC supply network and special protection device is installed on EV supply equipment.
-- confirmation of the right connection of electric vehicle and power supply equipment;
-- power supply control function;
-- outage control function of power supply equipment;
-- applicable maximum current allowed;
-- electric vehicle charge wake-up function.
When EV supply equipment is capable of performing energy transfer with multiple electric vehicles simultaneously, it needs to ensure that the above control pilot functions shall operate independently and normally at each charging connecting point. 5.2.1.2 Continuous monitoring of the continuity of protective earthing conductor When charging at modes 2, 3 and 4, the electrical continuity of protective earthing conductor shall be monitored continuously by EV supply equipment.
Note: The above requirement is not applicable to Category II equipment. For mode 2, monitoring is carried out between electric vehicle and in-cable control and protection device.
For modes 3 and 4, monitoring is carried out between electric vehicle and EV supply equipment.
In case that the electrical continuity of protective earthing conductor is detected to be lost during the energy transfer stage, the power supply circuit of EV supply equipment shall be cut off, which shall meet the corresponding requirements of A.3.10.6, B.4.7.5 and C.7.13.3.
5.2.1.3 Confirmation of the right connection of electric vehicle and power supply equipment
The supply equipment shall be able to determine that the vehicle connector or EV plug is plugged into the vehicle inlet or EV socket-outlet correctly.
5.2.1.4 Power supply control function
Only when the control pilot function between EV supply equipment and electric vehicle establishes correct relationship with the allowable power-on state signal, EV supply equipment can supply electricity to electric vehicle. However, it shall not automatically enter the discharge mode. Only when it receives a direct or indirect instruction from the power supply network to allow discharge and the discharge conditions of the electric vehicle are met, can the electric vehicle discharge to the power supply network through the charging and discharging equipment.
5.2.1.5 Outage control function of power supply equipment
When the control pilot function is interrupted, or the control pilot signal is not allowed for charging/discharging, or a discharge and power outage command is received, or other conditions that do not allow energy transfer are detected, the energy transfer between the power supply equipment and the electric vehicle shall be cut off, but its control pilot circuit may remain powered.
Note: Outage may be the result of other reasons, e.g., power off.
5.2.1.6 Applicable maximum current allowed
The power supply equipment shall be able to inform the electric vehicle of the applicable maximum current through PWM (mode 2 and mode 3) or digital
communication (mode 4). This value shall not exceed any of the following: -- rated operating current of power supply equipment;
-- rated current of cable assembly;
-- Maximum allowable discharge current of vehicle traction battery (dynamic change) (applicable to mode 4, V2G).
Note: Cable assemblies include those used in mode 2 and mode 3 charging, except for case B connection.
Due to application requirements (such as power supply network power restrictions, etc.), the power supply equipment can adjust its present applicable maximum current, but it shall not exceed its applicable maximum current allowed.
If the actual output current detected during the energy transfer stage is higher than the present applicable maximum current, the power supply equipment shall cut off the power supply circuit, which shall comply with the corresponding requirements of A.3.10.9, A.3.10.10 and C.7.6.4, as well as NB/T 33001-2018.
5.2.1.7 Electric vehicle charge wake-up function
In mode 2 and mode 3, after the connection set for charging is fully connected, the electric vehicle at sleep state shall be provided with the function of being awakened by the AC power supply equipment. The wake-up function realized through PWM signal shall comply with the provisions of sequence 3.1 in Table A.7.
For the DC charging system in mode 4 and using the control pilot function in Appendix B, when the auxiliary power supply circuit or communication interaction starts, the electric vehicle at sleep state shall be able to wake up and start charging (starting from t3 in Figure B.2).
For DC charging systems in mode 4 and using the control pilot function of Appendix C, the electric vehicle at sleep state shall be able to be awakened through check point 2 or check point 3, and shall comply with the provisions of C.4.2.1 and C.4.4. 5.2.2 Optional functions of mode 2, mode 3 and mode 4
5.2.2.1 Real time adjustment of the available load current of EV supply equipment Some method may be adopted to ensure the charging current not exceeding the real time available load current of EV supply equipment and AC/DC supply network. 5.2.2.2 Locking function of mode 2 and mode 3 charging coupler
Locking mechanism shall be provided to ensure the reliable connection of vehicle connector and/or EV plug, to avoid accidental live cut-off between power supply equipment and electric vehicle. When the rated current of power supply equipment and electric vehicle is less than or equal to 16 A AC, this function is optional. 5.2.2.3 Vehicle power supply circuit voltage adaptivity switching function Electric vehicles can be equipped with the vehicle power supply circuit voltage adaptivity switching function to achieve charging compatibility between electric vehicles of different voltage levels and the charging equipment. The entire voltage adaptivity switching process will not have a safety impact on the charging equipment and charging session.
Note: Appendix D provides a method for implementing vehicle power supply circuit voltage adaptivity switching for a DC charging system using the control pilot function of Appendix B. For the corresponding vehicle charging parameter update requirements, see GB/T 27930-2023.
5.2.2.4 V2G DC bi-directional charging function
Electric vehicles can discharge to the power supply network through charging and discharging equipment, which, however, can be achieved only when other additional conditions are met.
Note: See Appendix E for the implementation of V2G DC bi-directional charging function.
6 Communication
In mode 4, digital communication shall be adopted to achieve data exchange between electric vehicle and EV supply equipment, and the communication protocol shall comply with GB/T 27930-2023.
Under normal operating conditions and single fault conditions, the human body impedance corresponding to the water-wet conditions specified in 3.1.8 of GB/T 13870.1-2022 shall also be considered.
Note: The skin of people who sweat or after soaking in sea water are not taken into account.
7.1.4 Threshold of perception and startle reaction
During intended use and reasonably foreseeable misuse, protective measures shall be taken to avoid startle reactions before, during and after energy transfer, under normal operating conditions and under single fault conditions. Under normal operating conditions, there may be perception and reaction.
Note 1: Curve a (the boundary between AC1/AC2, DC1/DC2) in Table 11 and Table 13 in GB/T 13870.1-2008 corresponds to the threshold of startle reaction in this document.
Note 2: Intended use cases include but are not limited to holding energy transfer components, such as charging cable, power supply/vehicle connector and
power supply/vehicle inlet, cable detection, pre-charging, end of energy transfer, ordinary person or animals entering or leaving electric vehicles, opening and retrieving items from vehicle trunks/luggage compartments or other storage spaces, touching electric vehicle chassis, touching exposed metal parts of supply equipment.
For the current path, it shall be from fingers to feet at the charging coupler and from hands to feet at the chassis.
A means of protection shall be provided to limit contact current, such that the steady- state contact current between simultaneously accessible conductive parts shall not exceed:
-- 0.5 mA AC/2 mA DC, under normal operating conditions;
-- 3.5 mA AC/10 mA DC, under single fault conditions.
When the contact current of Class I equipment exceeds 3.5 mA (effective value), the contact current requirements shall comply with the provisions of 12.1.2. For DC charging, additional protection shall be provided so that when the basic protection and the fault protection of the DC power supply circuit fail at the same time, the steady-state contact current shall not exceed the DC2 limit value (line b) specified in Figure 22 and Table 13 of GB/T 13870.1-2022.
The power supply equipment shall be able to limit the discharge energy so that the discharge current/discharge energy shall not exceed:
-- 5 ??J, under normal operating conditions;
-- 0.5 mJ, under single fault conditions.
Note 3: This value is derived from 5.2.7b in GB/T 17045-2020.
For cable assembly, additional protection shall be provided so that when basic protection and cable assembly fault protection fail simultaneously, the steady-state contact current shall not exceed the C1 limit in Figure 20 of GB/T 13870.1-2022 and Figure 20 of GB/T 13870.2-2016 respectively.
The following parameters shall be used:
-- According to GB/T 13870.1-2022, the human body impedance is 575 ??;
-- According to ISO 17409:2020, the maximum Y capacitance of electric vehicles; -- The critical point of asymmetric/symmetric insulation resistance value in the energy transfer stage is 100 ??/V.
7.2 Basic protection
7.2.1 General
Basic protection is adopted for power supply equipment to prevent ordinary person from contacting live parts. One or more of the measures specified in 7.2.2, 7.2.3, 7.2.4 and 7.2.5 shall be taken.
7.2.2 Basic insulation of live parts for protection
Basic insulation is adopted for the live parts of the power supply equipment, which shall comply with the provisions of 4.4.3.2 in IEC 62477-1:2016.
Basic insulation shall provide protection by solid insulation or appropriately designed electrical clearance and/or creepage distance.
Any accessible conductive part that is not insulated from live parts as required is considered a hazardous live part.
Basic insulation shall be designed and tested to withstand impulse voltages and temporary overvoltage of the circuits to which it is connected.
The test shall be carried out in accordance with 5.2.3.2 and 5.2.3.4 of IEC 62477-1:2016. 7.2.3 Protection with enclosures or barriers
The power supply equipment adopts an enclosure or barrier protection method, which shall comply with the provisions of 4.4.3.3 in IEC 62477-1:2016.
Power supply equipment, protective earthing conductors and protective bonding conductors that are permanently installed in Modes 3 and 4 shall be permanently connected.
7.4 Protective earthing conductor
For all modes, protective earthing conductor shall be provided between the AC supply network earthing terminal, the DC supply network earthing terminal and the vehicle connector?€?s earthing terminal.
The protective earthing conductor shall comply with the regulations of GB/T 16895.3. For electric vehicle power supply equipment in Modes 3 and 4 that are permanently connected to the power supply network, switches or similar devices shall not be used to connect the protective earthing conductor.
For electric vehicles and power supply equipment in mode 4 that adopt the control pilot function of Appendix B, if there is no fuse (or similar device with overcurrent and short- circuit protection characteristics) installed in the vehicle connector, the minimum cross- sectional area of the protective conductor shall not be less than 16 mm2. Note: When a fuse (or similar device with overcurrent and short-circuit protection characteristics) is configured, the protective conductor can be selected to match the fuse.
For electric vehicles and power supply equipment in mode 4 that use the control pilot function of Appendix C, the minimum cross-sectional area of the protective conductor shall not be less than 6 mm2.
7.5 Complementary measures
To prevent the electric shock caused by failure of basic protection and/or fault protection or the user?€?s careless, additional protection, such as residual current protective device in accordance with 11.3 and insulation monitoring device (IMD) equipped in accordance with Appendix B and Appendix C, shall be provided. Additional...

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