NB/T 33021-2015 English PDF (NBT33021-2015)

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NB/T 33021-2015: Specification for electric vehicle off-board bi-directional charger
NB/T 33021-2015
NB
ENERGY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 29.200
K 81
Record No.. 49595-2015
Specification for electric vehicle
off-board bi-directional charger
ISSUED ON. APRIL 2, 2015
IMPLEMENTED ON. SEPTEMBER 1, 2015
Issued by. National Energy Board
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 General ... 6 
5 Basic composition ... 6 
6 Functional requirements ... 6 
7 Technical requirements ... 7 
8 Inspection rules ... 15 
9 Test methods ... 17 
10 Marks ... 28 
Specification for electric vehicle
off-board bi-directional charger
1 Scope
This Standard specifies the basic composition, functional requirements,
technical requirements, inspection rules, test methods, and identification of
electric vehicle off-board bi-directional charger (hereinafter referred to as the bi-
directional charger).
This Standard is applicable to the electric vehicle off-board bi-directional
charger that uses conductive charging and discharging.
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 2421.1, Environmental Testing for Electric and Electronic products -
General and Guidance (IEC60068-1.1988, IDT)
GB/T 2423.1, Environmental testing - Part 2. Test methods - Tests A. Cold
(IEC 60068-2-1.2007, IDT)
GB/T 2423.2, Environmental testing - Part 2. Test methods - Tests B. Dry
heat (IEC 60068-2-2.2007, IDT)
GB/T 2423.4, Environmental testing for electric and electronic products - Part
2. Test method - Test Db. Damp heat, cyclic ( 12h+12h cycle) (IEC 60068-
2-30.2005, IDT)
GB/T2423.5, Environmental testing for electric and electronic products Part
2. Test methods Test Ea and guidance. Shock (IEC 68-2-27.1987, IDT)
GB/T2423.10, Environmental testing for electric and electronic products -
Part 2. Tests methods - Test Fc. Vibration (sinusoidal) (IEC 60068-2-6.1995,
IDT)
GB/T 2423.55, Environmental testing for electric and electronic products -
Part 2. Test methods - Test Eh. hammer tests (IEC 60068-2-75.1997, IDT)
GB/T 3859.1, Semiconductor converters - General requirements and line
commutated converters - Part 1-1. Specification of basic requirements (IEC
60146-1-1.2009, MOD)
GB 4208, Degrees of Protection Provided By Enclosure (IP Code) (IEC
60529.2001, IDT)
GB 9254, Information technology equipment - Radio disturbance
characteristics - Limits and methods of measurement (IEC/CISPR 22.2006,
IDT)
GB/T 17626.2, Electromagnetic compatibility - Testing and measurement
techniques - Electrostatic discharge immunity test (IEC 61000-4-2.2001, IDT)
GB/T 17626.3, Electromagnetic compatibility - Testing and measurement
techniques - Radiated, radio-frequency, electromagnetic field immunity test
(IEC 61000-4-3.2002, IDT)
GB/T 17626.4, Electromagnetic compatibility - Testing and measurement
techniques - Electrical fast transient/burst immunity test (IEC 61000-4-4.
2004, IDT)
GB/T 17626.5, Electromagnetic compatibility - Testing and measurement
techniques - Surge immunity test (IEC 61000-4-5.2005, IDT)
GB/T 18487.1, Electric vehicle conductive charging system - Part 1. General
requirements
GB/T 19826 2005, General specification and safety requirement for DC
power supply equipment of power projects
GB/T 29317, Terminology of electric vehicle charging/battery swap
infrastructure
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T
18487.1 and GB/T 29317 as well as the followings apply.
bi-directional charger
a device for realizing bidirectional electric energy conversion between an
electric vehicle battery system and a power grid
7.1.1 Working environment temperature. 20°C ~ +50°C.
7.1.2 Relative humidity. 5% ~ 95% (according to no-condensation design).
7.1.3 Altitude. no more than 2000m.
7.1.4 In special circumstances, the use of the bi-directional charger shall be
negotiated between the manufacturer and the user.
7.1.5 The place of use must not have explosive medium, and there are no
harmful gases and conductive media surrounding corrosive and damaging
insulation.
7.2 Normal electrical conditions
7.2.1 Frequency variation range. 50Hz ± 1Hz.
7.2.2 AC power supply voltage fluctuation range. 380V power grid is 323V ~
437V, 220V power grid is 187V ~ 253V.
7.2.3 AC power supply voltage asymmetry does not exceed 5%.
7.2.4 Non-sinusoidal content of AC power supply voltage waveform is not
more than 10%.
7.3 Environmental resistance
7.3.1 Protection level
The casing protection level of the bi-directional charger shall not be lower than
IP30 (indoor) or IP54 (outdoor) in GB 4208.
7.3.2 Three anti-proof (anti-moist, anti-mildew, anti-salt spray)
protection
Circuits such as printed circuit boards and connectors in the bi-directional
charger shall be protected against moisture, mildew and salt spray.
7.3.3 Rust prevention (antioxidation prevention)
The iron casing of the bi-directional charger and the exposed iron brackets and
parts shall adopt double-layer anti-rust measures. Non-ferrous metal casings
shall also have an oxidation protection film or be treated with oxidation
protection.
7.3.4 Anti-theft
The bi-directional charger for outdoor operation shall have the necessary anti-
theft measures.
110% of the rated current.
7.7.12 The bi-directional charger shall be equipped with an emergency stop
switch, which can stop charging and discharging urgently by manual or remote
command.
7.7.13 When the bi-directional charger is properly connected to the battery,
the charging process can be allowed to start. When the bi-directional charger
detects that the connection with the battery is abnormal, it must stop charging
and discharging immediately.
7.7.14 During the charging and discharging process, the bi-directional charger
shall have obvious warning signs and text prompts to prevent personnel from
mis-operation.
7.8 DC output
7.8.1 DC side voltage
DC side voltage preferred range. 50V ~ 100V, 75V ~ 150V, 150V ~ 350V, 300V
~ 500V, 450V ~ 700V.
7.8.2 DC side current
DC side rated current preferred values. 10A, 20A, 50A, 100A, 160A, 200A,
250A, 315A, 400A, 500A.
7.8.3 Steady current accuracy
In the constant current state, the output/input DC current is within the range of
20% to 100% of the rated value, and the output/input current regulation
accuracy should not exceed ±1%.
7.8.4 Steady voltage accuracy
Under constant voltage conditions, the DC side voltage regulation accuracy
shall not exceed ±0.5%.
7.8.5 Ripple coefficient
In the constant voltage state, the ripple effective value coefficient shall not
exceed ±0.5%, and the ripple peak coefficient shall not exceed ±1%.
7.8.6 Current error
In the constant current state, the output/input DC current is set within the range
of 20% to 100% of the rated value. When the set output/input DC current is
greater than or equal to 30A, the output/input current setting error should not
exceed ±1%. When the set output/input DC current is less than 30A, the
ground according to the installation method specified in the technical standards
and instructions for use of the testing bi-direc...