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GB/T 43332-2023 English PDF (GBT43332-2023)

GB/T 43332-2023 English PDF (GBT43332-2023)

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GB/T 43332-2023: Safety requirements of conductive charging and discharging for electric vehicles
This document specifies the safety requirements for conductive charging and discharging of electric vehicles when they are conductively connected to an external electric power supply or external load.
GB/T 43332-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
CCS T 40
Safety Requirements of Conductive Charging and
Discharging for Electric Vehicles
(ISO 17409:2020, Electrically Propelled Road Vehicles - Conductive Power Transfer - Safety Requirements, MOD)
ISSUED ON: NOVEMBER 27, 2023
IMPLEMENTED ON: NOVEMBER 27, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 4
Introduction ... 8
1 Scope ... 9
2 Normative References ... 9
3 Terms and Definitions ... 11
4 Requirements for Power Supply Plugs and Vehicle Socket-outlets ... 12 4.1 Requirements for Power Supply Plugs (connection mode A) ... 12
4.2 Requirements for Vehicle Socket-outlets ... 12
5 Requirements for Protection against Electric Shock ... 13
5.1 General Requirements ... 13
5.2 Basic Protection When Connected to External Electric Power Supply ... 13 5.3 Protective Conductor ... 13
5.4 Insulation Resistance ... 15
5.5 Requirements When Not Connected to External Electric Power Supply ... 15 5.6 Insulation Coordination ... 18
5.7 Touch Current When Connected to External Electric Power Supply ... 18 5.8 Residual Current Device (RCD) ... 18
6 Requirements for Thermal Accident Protection... 19
6.1 Requirements under Normal Operating Conditions ... 19
6.2 Overcurrent Protection ... 19
6.3 Arc Protection of DC Connection ... 21
6.4 Remaining Power after Disconnection ... 21
6.5 Instantaneous Overvoltage ... 22
7 Additional Requirements for AC Charging ... 22
7.1 Voltage and Frequency Ranges of Normal Operation ... 22
7.2 Current Characteristics... 22
7.3 Power Factor ... 23
7.4 Interlock Function of Vehicle Interface ... 24
7.5 Phase Sequence of Three-phase Charging ... 24
8 Additional Requirements for DC Charging ... 24
8.1 General Requirements ... 24
8.2 Breaking Device ... 25
8.3 Control Pilot Function ... 25
8.4 Vehicle Insulation Monitoring System ... 25
8.5 Locking of Vehicle Plug ... 25
8.6 Temperature of Contacts ... 25
8.7 Overvoltage of Load Dump ... 26
8.8 Compatibility of Insulation Monitoring System ... 26
9 Requirements for External Discharge ... 27
9.1 General Requirements ... 27
9.2 AC Discharge ... 27
9.3 DC Discharge ... 29
10 Requirements for Functional Safety ... 29
10.1 Vehicle Operation ... 29
10.2 Charging Operation ... 29
10.3 Electromagnetic Immunity ... 30
11 Requirements for Environmental Conditions ... 30
11.1 General Requirements ... 30
11.2 Protection Degree ... 30
11.3 Surface Temperature ... 31
11.4 Electromagnetic Disturbance ... 31
12 User Manual and Markings ... 31
12.1 User Manual ... 31
12.2 Markings ... 31
13 Test Methods ... 31
13.1 General Rules ... 31
13.2 Protective Conductor Resistance Test ... 32
13.3 Insulation Resistance Test ... 32
13.4 Withstand Voltage Test ... 33
13.5 Surge Current Test ... 35
13.6 Test of Touch Current ... 36
13.7 Test of DC Maximum Charging Current ... 41
13.8 DC Power Contact Overtemperature Test ... 42
Appendix A (informative) Comparison of Structural No. between This Document and ISO 17409:2020 ... 44
Appendix B (informative) Measurement of Y Capacitance ... 45
B.1 General Rules ... 45
B.2 Test Devices ... 45
B.3 Test Procedures ... 47
Bibliography ... 49
Safety Requirements of Conductive Charging and
Discharging for Electric Vehicles
1 Scope
This document specifies the safety requirements for conductive charging and discharging of electric vehicles (hereinafter referred to as “vehicles”) when they are conductively connected to an external electric power supply or external load.
This document is applicable to vehicles whose socket-outlets (connection mode B and connection mode C) comply with GB/T 20234.2 and / or GB/T 20234.3, and power supply plugs (connection mode A) comply with GB/T 1002 and / or GB/T 20234.2.
This document is applicable to vehicles with power supply circuit of Class B voltage and can be externally charged and discharged. Vehicles whose power supply circuit is Class A voltage may take this document as a reference in the implementation.
This document is applicable to charging mode 2, charging mode 3 and charging mode 4 defined in GB/T 18487.1-2023. For charging mode 4, this document is applicable to conductive charging with an isolated off-board charger.
NOTE 1: this document does not provide the requirements for charging mode 1. NOTE 2: the external electric power supply does not belong to the vehicle. This document is applicable to the on-board part of the vehicle power supply circuit, and also applies to the charging and discharging control function of the vehicles conductively connected to an external electric power supply or external load.
This document does not apply to general safety precautions for manufacturing, maintenance and repair personnel.
NOTE 3: for general safety requirements for the vehicles, see GB 18384. 2 Normative References
The contents of the following documents constitute indispensable clauses of this document through the normative references in the text. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB/T 1002 Single Phase Plugs and Socket-outlets for Household and Similar Purposes - Types, Basic Parameters and Dimensions
diagram of Scheme 2)
5.3.3 All exposed conductive parts of components on the vehicle power supply circuit shall be connected to the vehicle electric platform through protective conductors. 5.3.4 The cross-sectional area of the protective conductors shall be designed in accordance with GB/T 16895.3.
5.3.5 The protective conductors of the vehicle power supply circuit shall be designed based on relevant parameters (such as: fault current and breaking time), with consideration of the energy sources of the vehicle itself and external electric power supply.
5.3.6 The connection resistance of the protective conductors between the protective conductor contacts of the power supply plug (connection mode A) and the vehicle socket-outlet (connection mode B and connection mode C), and the vehicle electric platform, as well as between all exposed conductive parts on the vehicle power supply circuit, shall be less than 0.1 , and shall be applicable to all conduction paths that function as protective conductor connections.
5.4 Insulation Resistance
5.4.1 AC connection
When the vehicle is not connected to an external electric power supply, the insulation resistance of the vehicle power supply circuit shall be not less than 500 /V, and the measurement reference voltage shall be the maximum working voltage of the vehicle power supply circuit. 5.4.2 DC connection
5.4.2.1 When the vehicle is not connected to an external electric power supply, the insulation resistance of the on-board part of the vehicle power supply circuit shall comply with the requirements of GB 18384.
5.4.2.2 When the vehicle is connected to an off-board charger, the total insulation resistance of the vehicle power supply circuit shall be not less than 100 /V. The safety requirements when the vehicle is connected to an external electric power supply shall comply with 8.1. 5.5 Requirements When Not Connected to External Electric Power Supply
5.5.1 General requirements
5.5.1.1 When the contacts of the power supply plug (connection mode A) and vehicle socket- outlet (connection mode B and connection mode C) are not connected to the external electric power supply and are in one of the following states, they shall satisfy the requirements of 5.5.3: a) If the contacts cannot be touched by the probe 18 specified in GB/T 16842, then, within 10 s the contacts are disconnected from the conductive charging connection; b) If the contacts comply with IPXXB specified in GB/T 30038, then, within 5 s the contacts are disconnected from the conductive charging connection;
c) If the contacts do not comply with IPXXB specified in GB/T 30038, then, within 1 s the contacts are disconnected from the conductive charging connection.
5.5.1.2 If the power supply plug (connection mode A) and the vehicle socket-outlet (connection mode B and connection mode C) are equipped with an electronic locking device, the vehicle shall be allowed to be unlocked after reaching the relevant thresholds specified in 5.5.2 and 5.5.3.
5.5.1.3 If the power supply plug (connection mode A) and the vehicle socket-outlet (connection mode B and connection mode C) are not equipped with an electronic locking device, when the contacts are not connected to the external electric power supply and are in one of the following states, they shall satisfy the requirements of 5.5.2:
a) If the contacts cannot be touched by the probe 18 specified in GB/T 16842, then, within 10 s the contacts are disconnected from the conductive charging connection; b) If the contacts comply with IPXXB specified in GB/T 30038, then, within 5 s the contacts are disconnected from the conductive charging connection;
c) If the contacts do not comply with IPXXB specified in GB/T 30038, then, within 1 s the contacts are disconnected from the conductive charging connection.
NOTE 1: if the contacts comply with IPXXD, then, they shall be deemed to comply with IPXXB. NOTE 2: the locking device is usually located on the vehicle or external electrical equipment. 5.5.2 Normal operation
5.5.2.1 When the contacts of the power supply plug (connection mode A) and the vehicle socket-outlet (connection mode B and connection mode C) are not connected to the external electric power supply, they shall at least satisfy the following requirements: a) The contacts shall comply with IPXXD specified in GB/T 30038;
b) When they do not comply with IPXXD specified in GB/T 30038, the voltage between the contacts and any other contact, and between the contacts and the electric platform shall be less than DC 60 V and AC 30 V;
c) When they do not comply with IPXXD specified in GB/T 30038, the steady-state touch current between the contacts and any other contact, and between the contacts and the electric platform shall be less than AC 0.5 mA and DC 2 mA, and the electric energy stored between the contacts and any other contact, as well as between the contacts and the electric platform, shall not trigger a startle reaction. The limits are specified by the manufacturer with reference to GB/T 13870 (all parts). NOTE 1: GB/T 17045 and GB/T 13870.1 provide the steady-state touch current threshold. NOTE 2: independent of the electric energy stored in the on-board power supply (for example, a rechargeable energy storage system), the touch current touching this electric energy is limited by a sufficiently high protective impedance.
NOTE 3: GB/T 13870.2 provides the stipulations for perception threshold and pain threshold. NOTE 4: GB/T 13870.2 provides the specified charge or specified electric energy for the pain threshold. The specified electric energy provided by GB/T 13870.2 may not be relevant to the fault type of the socket-outlet.
5.5.2.2 If it can be proven through design review that there is no conductive path from the on- board power supply (for example, a rechargeable energy storage system) to the accessible conductor part, then, it can be regarded as satisfying the requirements for steady-state touch current.
5.5.3 Operation under single-point failure condition
5.5.3.1 Under the condition of single-point failure, when the contacts of the power supply plug (connection mode A) and the vehicle socket-outlet (connection mode B and connection mode C) are not connected to the external electric power supply, they shall satisfy at least one of the following requirements:
a) The contacts shall comply with IPXXD specified in GB/T 30038;
b) When they do not comply with IPXXD specified in GB/T 30038, the voltage between the contacts and any other contact, and between the contacts and the electric platform shall be less than DC 60 V and AC 30 V;
NOTE 1: a power outage will generate the same voltage levels as under normal operating conditions. Different thresholds are independent of single-point failure situations. c) When they do not comply with IPXXD specified in GB/T 30038, the steady-state touch current between the contacts and any other contact, and between the contacts and the electric platform shall be less than AC 3.5 mA and DC 10 mA, and the electric energy stored between the contacts and any other contact, and between the contacts and the electric platform shall not trigger strong involuntary muscle reactions. The limits are specified by the manufacturer with reference to GB/T 13870 (all parts). NOTE 2: GB/T 17045 and GB/T 13870.1 provide the steady-state touch current threshold. NOTE 3: independent of the electric energy stored in the on-board power supply (for example, a rechargeable energy storage system), the touch current touching this electric energy is limited by a sufficiently high protective impedance.
5.5.3.2 If it can be proven through design review that there is no conductive path from the on- board power supply (for example, a rechargeable energy storage system) to the accessible in 11.3 of GB/T 18487.1-2023.
6 Requirements for Thermal Accident Protection
6.1 Requirements under Normal Operating Conditions
6.1.1 The cross-sectional area of the live part of the vehicle power supply circuit, as well as the rated current of the power supply plug (connection mode A), and the vehicle socket-outlet (connection mode B and connection mode C) shall comply with the maximum current that the vehicle power supply circuit can carry under normal operating conditions. 6.1.2 For DC conductive charging, when considering the maximum ambient temperature of the vehicle, if the temperature limit specified in 8.6 is not exceed, and overheating protection is provided to prevent the vehicle power supply circuit from exceeding the temperature limit, the cross-sectional area of the live parts can be reduced.
6.1.3 Appropriate measures may be taken to monitor and control the temperature of the vehicle power supply circuit. Under the condition that the DC contact temperature complies with the stipulations of 8.6 and the temperature of other on-board parts of the vehicle power supply circuit complies with the vehicle manufacturer’s regulations, the vehicle charging current can be greater than the continuous maximum charging current value of the vehicle socket-outlet and other on-board parts of the vehicle power supply circuit.
6.2 Overcurrent Protection
6.2.1 General rules
6.2.1.1 The vehicle power supply circuit shall have measures to prevent thermal accidents caused by the following situations:
---overload.
---short circuit.
6.2.1.2 Different overcurrent protection methods can be adopted for different circuit parts. NOTE 1: overcurrent protection is not regarded as a method of detecting and interrupting series or parallel arcs. Arcing may cause injury. Appropriate measures to address arcing problems include maintenance, pollution levels, insulation, clearances, creepage distances and other modes.
NOTE 2: the rated current of the external electric power supply may be greater than the rated current of the on-board part of the vehicle power supply circuit.
6.2.2 Overload protection
The vehicle shall provide overload protection to prevent the charging current from exceeding the continuous maximum charging current value of the vehicle power supply circuit or the temperature from exceeding the temperature limit of the vehicle power supply circuit. NOTE: overload protection methods include, but are not limited to, overload monitoring and contactor disconnection functions.
6.2.3 Short-circuit protection of AC connection
6.2.3.1 For short-circuit currents generated by the external electric power supply, one of the following requirements shall be satisfied.
a) In accordance with the overcurrent protection characteristics of the external electric power supply, the cross-sectional area of the live conductor of the vehicle power supply circuit has a certain short-circuit current tolerance capacity value (I2t). The short-circuit current tolerance capacity value (I2t) of the vehicle power supply circuit is not less than 80,000 A2s. The short-circuit current tolerance capacity value (I2t) is calculated in accordance with GB/T 16895.5-2012.
NOTE: overcurrent protection has a breaking time of up to 5 seconds (see GB/T 16895.21). b) Each live conductor of the vehicle power supply circuit is provided with overcurrent protection (such as: fuse and circuit breaker). The live conductor protected by the overcurrent protection device has a sufficient cross-sectional area to carry the overcurrent value corresponding to the overcurrent protection characteristic. The cross-sectional area of the live conductor between the vehicle socket-outlet and the overcurrent protection device satisfies a).
c) The on-board charger provides an overcurrent protection device (for example, fuse or circuit breaker) on each live conductor of the vehicle power supply circuit. The live conductor between the vehicle socket-outlet and the overcurrent protection device has a sufficient cross-sectional area to carry the overcurrent value corresponding to the overcurrent protection characteristic. The on-board part of the vehicle power supply circuit between the vehicle socket-outlet and the overcurrent protection device can prevent mechanical damage, so that no insulation fault occurs between live conductors, and between live conductor and the electric platform due to single-point failure.
6.2.3.2 The vehicle shall provide short-circuit protection against short-circuit currents generated by the vehicle’s power supply.
6.2.4 Short-circuit protection of DC connection
6.2.4.1 Short-circuit electric energy generated by external electric power supply For short-circuit currents generated by the external electric power supply, the following short- circuit protection requirements shall be satisfied.
a) The short-circuit current tolerance capacity value (I2t) of the vehicle power supply circuit is greater than 1,000,000 A2s. The minimum cross-sectional area of the live conductor is calculated in accordance with Formula (3) of GB/T 16895.5-2012. NOTE: the short-circuit current tolerance capacity value (I2t) corresponds to the characteristics of the overcurrent protection device of the external electric power supply. The provided short- circuit current tolerance capacity value is coordinated with NB/T 33001-2018. b) The vehicle power supply circuit provides an overcurrent protection device (for example, fuse or circuit breaker). The cross-sectional area of the live conductor protected by the overcurrent protection device complies with the short-circuit current breaking capacity of the overcurrent protection device. The cross-sectional area of the live conductor between the vehicle socket-outlet and the overcurrent protection device complies with the requirements of a). The short-circuit current breaking time is obtained from the table of technical parameters of the overcurrent protection device. 6.2.4.2 Short-circuit current generated by vehicle power supply
6.2.4.2.1 The vehicle shall provide overcurrent protection for the vehicle power supply circuit and the e...
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