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This standard replaces NB/T 33001-2010 Specification for electric vehicle off-board conductive charger. In addition to a number of editorial changes, the following main technical changes have been made with respect to NB/T 33001-2010:
——“7 Inspection rules” and “8 Test methods” given in NB/T 33008.1 are deleted;
——“5 Classification of chargers” is added to this standard for classifying chargers from different angles;
——“8 Marking, packaging, transportation and storage” of this new standard is corresponding to “9 Marking” of the original one;
——“3 Terms and definitions” of this standard is the modification to the original “3 Terms and definitions” and 19 new terms and definitions are added;
——“4 Basic constitution” of this standard is the modification to the original “4 Basic constitution” and block diagram for constitution principle is added;
——“6 Functional requirements” of this standard makes modification to “communication function”, “man-machine interaction function”, “input function” and “metering function” in the original “5 Functional requirements”; “category of applicable battery”, “charging set mode” and “low-voltage auxiliary power supply” in the original standard are deleted; “insulation testing function”, “short-circuit testing function for DC output circuit”, “vehicle plug locking function”, “precharge function”, “emergency stop function” and “protection function” are added;
——“7 Technical requirements” of this standard makes modification to “environment conditions”, “power supply requirements”, “environment resistant requirements”, “temperature rise requirements”, “protection requirements”, “safety requirements”, “electrical insulation performance”, “output voltage and current”, “efficiency and power factor of charger”, “electromagnetic compatibility requirements”, “mechanical strength” and “noise” in “6 Technical requirements” of the original standard; “reliability index” and “equalizing current unbalance” in the original standard are deleted; “current ripple”, “constant power output”, “low-voltage auxiliary power supply”, “output response requirements of charger”, “output overshoot during startup”, “capacitive coupling”, “standby power”, “measuring error of output voltage and current”, “charging mode and type of connection”, “control pilot circuit”, “timing and process of charging control”, “mechanical strength”, “characteristics of mechanical switchgear” and “cold dry heat and damp heat properties” are added;
——In “8 Marking, packaging, transportation and storage”, the contents of marking are modified and added and requirements for packaging, transportation and storage are added.
This part was proposed by the China Electricity Council.
This standard is under the jurisdiction of the Technical Committee on Electric Vehicle Charging Infrastructure of Standardization Administration of Energy Industry (NEA/TC3).
During the process of implementing this standard, the relevant comments and recommendations, whenever necessary, can be fed back to the Standardization Center of the China Electricity Council (No.1, 2nd lane, Baiguang Road, Beijing, 100761, China).
Specification for electric vehicle off-board conductive charger
1 Scope
This standard specifies the terms and definitions, basic constitution, classification, functional requirements, technical requirements as well as marking, packaging, transportation and storage of electric vehicle off-board conductive charger (hereinafter referred to as charger).
It is applicable to the electric vehicle off-board charger by the way of conductive charge, with the maximum rated voltage of the power supply being 1 000V AC or 1 500V DC and the maximum rated output voltage being 1 500V DC.
2 Normative references
The following referenced documents are indispensable for the application 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 2423.1-2008 Environmental testing - Part 2: Test methods - Tests A: Cold
GB/T 2423.2-2008 Environmental testing - Part 2: Test methods - Tests B: Dry heat
GB/T 2423.4-2008 Environmental testing for electric and electronic products - Part 2: Test method - Test Db: Damp heat, cyclic (12h+12h cycle)
GB/T 2423.16-2008 Environmental testing for electric and electronic products - Part 2: Test methods - Test J and guidance: Mold growth
GB/T 2423.17-2008 Environmental testing for electric and electronic products - Part 2: Test methods - Test Ka: Salt mist
GB/T 2423.55-2006 Environmental testing for electric and electronic products - Part 2: Test methods - Test Eh: Hammer tests
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 4797.5 Classification of environmental conditions - Environmental conditions of nature - Precipitation and wind
GB/T 13384 General specifications for packing of mechanical and electrical product
GB/T 18487.1-2015 Electric vehicle conductive charging system - Part 1: General requirements
GB/T 18487.2-2017 Electric vehicle conductive charging system - Part 2: EMC requirements for off-board electric vehicle supply equipment
GB/T 19596-2017 Terminology of electric vehicles
GB/T 20234.1-2015 Connection set for conductive charging of electric vehicles - Part 1: General requirements
GB/T 20234.3-2015 Connection set of conductive charging for electric vehicles - Part 3: DC charging coupler
GB/T 27930 Communication protocols between off-board conductive charger and battery management system for electric vehicle
GB/T 29317 Terminology of electric vehicle charging/battery swap infrastructure
GB/T 29318 Electric energy metering for electric vehicle off-board charger
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 18487.1-2015, GB/T 19596-2017 and GB/T 29317 as well as the following ones apply.
3.1
conductive charge
approach to charging storage battery by the way of electrical conduction
3.2
off-board charger
a special device, fixedly connected to AC or DC power supply and converting the electric energy to the direct current, that charges the power storage battery of electric vehicle by the way of conduction
3.3
charging terminal
a part of the off-board conductive charger that the charging operator needs to face and operate when an electric vehicle is charged; it is generally composed of charging cable, vehicle plug, and human-machine interface, and may also include components for metering, communication, control and the like
3.4
split type charger
a charger having the power conversion unit structurally separated from the charging terminal and connected to the terminal by a cable
3.5
integral charger
a charger having the power conversion unit, the charging terminal and other components placed in a cabinet (box), and integrated on the structure
3.6
dynamic power allocation
the charger dynamically adjusts the maximum output power of each vehicle plug according to the predetermined power distribution control strategy based on the vehicle charging demand, its own load state and the superior monitoring and control command
3.7
single interface charger
a charger having only one vehicle plug and capable of only charging one electric vehicle at a time
3.8
multiple interface charger
a charger having multiple vehicle plugs which can realize dynamic power allocation function and capable of simultaneously or sequentially charging multiple electric vehicles
3.9
automatic charging
during the charging process, the charger shall make dynamic adjustment to the charging parameter according to the data provided by the BMS of the electric vehicle or the vehicle controller, so as to implement corresponding operations and complete the charging process
3.10
DC output circuit
electrical circuit through which the charging current flows when the electric vehicle is charged with a charger. Including switching devices and functional components connected to the DC output of the charger, as well as charging cables, vehicle plugs, vehicle sockets, and components between the vehicle socket and the DC contactor within the vehicle
3.11
precharge
process that the charger raises the output voltage to the battery terminal voltage of the vehicle minus 1V~10V after the vehicle-side DC contactor is closed and before the charger-side DC contactor is closed during the charging activation process of the charger for the electric vehicle
3.12
setting value of voltage-limiting
output voltage set when the charger operates at stabilized voltage
3.13
setting value of current-limiting
output current set when the charger is under current-limiting operation
3.14
standby mode
state that the charger only retains basic functions such as background communication and state indicator lights when there is no vehicle charging and personnel operation
3.15
standby power
the input power when the charger is in standby mode, which is called standby power consumption
3.16
rated output voltage
in this standard, it refers to the maximum output voltage of the charger during normal operation
3.17
rated output current
in this standard, it refers to the maximum output current of the charger at rated output voltage
3.18
maximum output current
in this standard, it refers to the maximum output current of the charger at rated output power
3.19
rated output power
in this standard, it refers to the product of the rated output voltage and the rated output current of the charger
3.20
DC voltage ripple factor
ratio of half of the difference of peak value and valley value of pulse DC voltage to the average DC voltage
3.21
constant power
state at which the output power of the charger is maintained constant
4 Basic constitution
The basic components of the charger include power supply input, power conversion unit, output switch unit, charging cable and vehicle plug, control power supply, charge control unit, human-machine interaction unit, as well as functional units such as the metering unit. The schematic diagram for the charger constitution principle is as shown in Figure 1.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Basic constitution
5 Classification of chargers
6 Functional requirements
7 Technical requirements
8 Marking, packaging, transportation and storage
