GB/T 43332-2023 Safety requirements of conductive charging and discharging for electric vehicles
1 Scope
This document specifies the safety requirements for conductive connection of electric vehicles (hereinafter referred to as "vehicles") to external electric power supplies or external electric loads for conductive charging and discharging.
This document is applicable to vehicles with vehicle inlets (case B and case C connections) conforming to the requirements of GB/T 20234.2 and/or GB/T 20234.3 and those with plugs (case A connection) conforming to the requirements of GB/T 1002 and/or GB/T 20234.2.
This document is applicable to vehicles with voltage class B power supply circuit which can be charged and discharged externally. For vehicles with voltage class A power supply circuit, this document may be taken as a reference.
This document is applicable to charging modes 2, 3, and 4 as defined in GB/T 18487.1-2023. For charging mode 4, this document is applicable to conductive charging with isolated off-board chargers.
Note 1: This document does not provide requirements for charging mode 1.
Note 2: External electric power supplies are not part of the vehicle.
This document is applicable to the on-board sections of vehicle power supply circuits. It is also applicable to charging and discharging control functions used for the conductive connection of the vehicle to an external electric power supply or external electric load.
This document is not applicable to comprehensive safety precautions for manufacturing, maintenance and repair personnel.
Note 3: See GB 18384 for general safety requirements for vehicles.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1002 Single phase plugs and socket-outlets for household and similar purposes - Types, basic parameters and dimensions
GB/T 2099.1 Plugs and socket-outlets for household and similar purposes - Part 1: General requirements (GB/T 2099.1-2021, IEC 60884-1:2013, MOD)
GB/T 12113 Methods of measurement of touch current and protective conductor current (GB/T 12113-2023, IEC 60990:2016, IDT)
GB/T 16842 Protection of persons and equipment by enclosures - Probe for verification (GB/T 16842-2016, IEC 61032:1997, IDT)
GB/T 16895.3 Low-voltage electrical installations - Part 5-54: Selection and erection of electrical equipment - Earthing arrangements and protective conductors (GB/T 16895.3-2017, IEC 60364-5-54: 2011, IDT)
GB/T 16895.5-2012 Low-voltage electrical installations - Part 4-43: Protection for safety - Protection against overcurrent (IEC 60364-4-43: 2008, IDT)
GB/T 16895.21 Low-voltage electrical installations - Part 4-41: Protection for safety - Protection against electric shock (GB/T 16895.21-2020, IEC 60364-4-41:2017, IDT)
GB/T 16895.23 Low-voltage electrical installations - Part 6: Verification (GB/T 16895.23-2020, IEC 60364-6:2016, IDT)
GB/T 16935.1 Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests (GB/T 16935.1-2023, IEC 60664-1:2020, IDT)
GB/T 17625.2 Electromagnetic compatibility (EMC) - Limits - Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current ≤16A per phase and not subject to conditional connection (GB/T 17625.2-2007, IEC 61000-3-3:2005, IDT)
GB/T 17625.7 Electromagnetic compatibility - Limits - Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems for equipment with rated current ≤ 75A and subject to conditional connection (GB/T 17625.7-2013, IEC 61000-3-11:2000, MOD)
GB 18384 Electric vehicles safety requirements
GB/T 18487.1-2023 Electric vehicle conductive charging system - Part 1: General requirements
GB/T 19596 Terminology of electric vehicles
GB/T 20234.1 Connection set for conductive charging of electric vehicles - Part 1: General requirements
GB/T 20234.2 Connection set for conductive charging of electric vehicles - Part 2: AC charging coupler
GB/T 20234.3 Connection set for conductive charging of electric vehicles - Part 3: DC charging coupler
GB/T 30038 Road vehicles - Degrees of electrical equipment protection (IP-code) (GB/T 30038-2013, ISO 20653:2006, MOD)
GB/T 34657.2-2017 Interoperability test specifications of electric vehicle conductive charging - Part 2: Vehicle
GB 38031 Electric vehicles traction battery safety requirements
GB/T 40428-2021 Electromagnetic compatibility requirements and test methods of conductive charging for electric vehicles
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB 18384, GB/T 18487.1-2023, GB/T 19596, GB/T 20234.1 and the following apply.
3.1
power factor
ratio of the active power to the apparent power under cyclic conditions
[Source: GB/T 2900.74-2008, 131-11-46, modified]
3.2
cut-off current
let through current
maximum instantaneous value of current attained during the breaking operation of a switching device or a fuse
Note: This concept is of particular importance when the switching device or the fuse operates in such a manner that the prospective peak current of the circuit is not reached.
[Source: GB/T 15166.1-2019, 2.2.7, modified]
3.3
vehicle power supply circuit
voltage class B electric circuit which includes all parts that are conductively connected to the plug [case A connection] or the vehicle inlet [case B and case C connections] or the plug (case A connection) or the vehicle inlet (case B and case C connections) for connection to external electric power supplies or external electric loads
Note: The vehicle power supply circuit includes the on-board section of the vehicle power supply circuit and the off-board section being part of the external electric power supply.
3.4
external electric power supply
electric power source that is not part of the vehicle for supplying electric energy to a vehicle using an EV energy transfer equipment
3.5
interlock function
function that prevents the power contacts of a socket-outlet/vehicle connector from becoming live before it is in proper engagement with a plug/vehicle inlet, and which either prevents the plug/vehicle connector from being withdrawn while its power contacts are live or makes the power contacts dead before separation
3.6
residual current device; RCD
mechanical switching device designed to make, carry and break currents under normal service conditions and to cause the opening of the contacts when the residual current attains a given value under specified conditions
[Source: GB/T 2900.70-2008, 442-05-02]
3.7
thermal cut-out
temperature sensing control device intended to switch-off automatically under abnormal operating conditions and which has no provision for adjustment by the owner
[Source: GB/T 2900.70-2008, 442-01-43, modified]
Foreword i
Introduction v
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements for the plug and vehicle inlet
4.1 Requirements for the plug (case A connection)
4.2 Requirements for the vehicle inlet
5 Requirements for protection of persons against electric shock
5.1 General requirements
5.2 Basic protection when connected to an external electric power supply
5.3 Protective conductor
5.4 Isolation resistance
5.5 Requirements for operation without external electric power supply
5.6 Insulation coordination
5.7 Touch current during connection to an external electric power supply
5.8 Residual current devices (RCD)
6 Requirements for protection against thermal incident
6.1 Requirements for normal operation
6.2 Overcurrent protection
6.3 Arc protection for DC connections
6.4 Residual energy after disconnection
6.5 Transient overvoltage
7 Additional requirements for AC charging
7.1 Voltage and frequency ranges for normal operation
7.2 Current characteristics
7.3 Power factor
7.4 Interlock function for the vehicle coupler
7.5 Phase sequence in three-phase charging
8 Additional requirements for DC charging
8.1 General requirements
8.2 Disconnection device
8.3 Control pilot functions
8.4 Vehicle isolation resistance monitoring system
8.5 Locking of the vehicle connector
8.6 Contact temperature
8.7 Overvoltage in case of a load dump
8.8 Compatibility of isolation resistance monitoring system
9 Discharging requirements for electric vehicle
9.1 General requirements
9.2 AC discharging
9.3 DC discharging
10 Functional safety requirements
10.1 Vehicle operation
10.2 Charging operation
10.3 Electromagnetic immunity
11 Requirements for environment conditions
11.1 General requirements
11.2 Degree of protection
11.3 Surface temperature
11.4 Electromagnetic disturbance
12 Owner’s manual and marking
12.1 Owner's manual
12.2 Marking
13 Test methods
13.1 General requirements
13.2 Test for resistance of protective conductor
13.3 Isolation resistance test
13.4 Withstand voltage test
13.5 Inrush current test
13.6 Touch current test
13.7 DC power transfer with maximum charging current
13.8 DC power contact over temperature test
Annex A (Informative) Comparison of clause/subclause numbers between this document and ISO 17409:2020
Annex B (Informative) Y capacitance measurement
B.1 General requirements
B.2 Test setup
B.3 Test procedure
Bibliography
