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Inspection and test specifications for electric vehicle charging equipment - Part 1: Off-board charger
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NB/T 33008.1-2018: Inspection and test specifications for electric vehicle charging equipment - Part 1: Off-board charger
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/NBT33008.1-2018
ENERGY INDUSTRY STANDARD OF
THE PEOPLE��S REPUBLIC OF CHINA
ICS 29.200
K 81
Filing number. 68878-2018
Replacing NB/T 33008.1-2013
Inspection and test specifications for electric vehicle
charging equipment - Part 1.Off-board charger
Issued on. DECEMBER 25, 2018
Implemented on. MAY 01, 2019
Issued by. National Energy Administration
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 8
4 Inspection rules... 8
5 Test methods... 12
Appendix A (Informative) Battery simulation test device... 50
1 Scope
This part specifies the inspection rules and test methods for the off-board
charger of electric vehicle (hereinafter referred to as chargers).
This part applies to the type test, exit-factory inspection, arrival acceptance of
the charger.
This part applies to the charger as specified in NB/T 33001-2018.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 2421.1-2008 Environmental testing for electric and electronic
products - General and guidance
GB/T 2423.1-2008 Environmental testing for electric and electronic and
electronic products - Part 2.Test methods - Tests A. Cold
GB/T 2423.2-2008 Environmental testing for electric and electronic products
- 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 2423.17-2008 Environmental testing for electric and electronic
products - Part 2.Test method - 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 4824-2013 Industrial, scientific and medical equipment - Radio-
frequency disturbance characteristics - Limits and methods of measurement
GB/T 7251.1-2013 Low-voltage switchgear and control gear assemblies -
Part 1.General
3 Terms and definitions
The terms and definitions as defined in GB/T 18487.1-2015, GB/T 18487.2-
2017, GB/T 29317, NB/T 33001-2018 apply to this document.
4 Inspection rules
4.1 Classification of inspections
Product inspection is divided into three types. type test, exit-factory inspection,
arrival inspection.
4.1.1 Type test
The product must be type tested under the following conditions.
4.1.2 Exit-factory inspection
Each product shall undergo exit-factory inspection. After being confirmed by the
manufacturer's quality inspection department, it must have a certificate
certifying that the product is qualified before exit-factory.
4.1.3 Arrival acceptance
The receiving organization should inspect the received products before use.
They can only be put into use after the products have passed the acceptance.
The specific acceptance sampling plan is decided by each receiving
organization.
4.2 Test items
The test items of the charger are as shown in Table 1.
4.3 Qualification judgement
The test items for type test and exit-factory inspection shall be carried out in
accordance with Table 1.After all the test items corresponding to the inspection
category of the tested product meet the requirements, the category can be
judged as qualified; otherwise it is judged as unqualified.
5 Test methods
5.1 Test conditions
5.1.1 Test system
The charger test system mainly includes three-phase adjustable power supply,
vehicle sockets, vehicle battery management system��s simulation software,
vehicle control analog circuits, AC voltage and current measurement
instruments, DC voltage and current measurement instruments, battery
simulation devices, which can be configured with higher-level monitoring
system or operation management system, main control machine, etc.,
5.1.2 Test environmental conditions
In this standard, except for environmental test conditions, other tests are
conducted under standard atmospheric conditions for measurement and test.
During the test period of each item, the test environmental conditions shall be
relatively stable, that is.
5.1.4 Requirements for test instrument
Unless otherwise specified, the instruments used in the test shall meet the
following requirements.
5.1.5 Current sensor
The current can be measured using the ammeter direct measurement method
or the secondary measurement method via a current sensor. The sensor can
be a shunt or a Hall sensor. The sensor shall meet the following requirements.
5.1.6 Test load
It is recommended to use a resistive load or a battery simulation device with a
function to simulate battery voltage and load. See Appendix A.
5.2 General inspection
5.2.1 Visual inspection
Visually check that the housing of the charger (including the charging
connection device) shall be flat, without obvious defects such as bumps,
scratches, deformation, etc.; the surface coating and plating shall be uniform
and not fall off; the parts (including the internal contacts of the connection
device) shall be fastened and reliable, without such defects and damages as
rust, burr, crack.
5.2.3 Inspection of basic composition
Open the door of the charger; visually check that the basic structure of the
charger, which shall include power supply input, power conversion unit, output
switch unit, charging cable and vehicle plug, control power supply, charging
control unit, human-computer interaction unit. It should include metering and
other functional unit.
5.2.4 Inspection of mechanical switch equipment
5.2.5 Inspection of lightning protection
Check the charger, which shall take lightning protection measures and comply
with the provisions of 11.7 in GB/T 18487.1-2015.
5.2.6 Inspection of anti-theft measures
Inspect the outdoor chargers, which shall have anti-theft measures, such as
anti-theft locks and anti-theft screws. Meanwhile there shall be relevant
requirements in the product installation instructions.
5.3 Functional test
5.4 Test of safety requirements
5.5 Inspection of charging mode and connection method
Visually check that the charging mode used by the charger shall comply with
the charging mode as specified in 5.1 of GB/T 18487.1-2015 4.The connection
method shall adopt the connection method C as specified in 3.1.3.3 of GB/T
18487.1-2015.
5.6 Inspection of charging connection device and cable
5.7 Inspection of electrical isolation
Check the electrical schematic diagram of the charger; visually observe that the
power supply input and DC output of the charger shall be electrically isolated.
For a multi-charger, the DC output ports shall be electrically isolated. Electrical
isolation protection measures shall comply with the provisions of 7.5.5 in NB/T
33001-2018.
5.8 Test of electric shock protection
5.9 Test of electrical clearance and creepage distance
Use a measuring gauge or Vernier caliper to check the minimum clearance and
creepage distance at the specified part of the charger, which shall comply with
the requirements of Table 2.The creepage distances in Table 2 are the specified
values for the basic insulations.
5.10 Insulation performance test
5.10.1 Insulation resistance test
Apply a DC voltage between the charged circuits that are not electrically
connected to the charger, between each independent charged circuit and the
ground (metal case); the insulation resistance shall not be less than 10 M.
5.10.2 Dielectric strength test
Apply 1 min power frequency AC voltage between the charged circuits that are
not electrically connected to the charger, between the independent charged
circuits and the ground (metal case), as specified in Table 3 (it may also use
DC voltage; the test voltage is 1.4 times the effective value of the AC voltage).
During the test, the leakage current value of the charger shall not be greater
than 10 mA. The test location shall not have insulation breakdown or flashover.
For chargers with an insulating material shell, the test is performed in
accordance with the method of 10.9.4 in GB/T 7251.1-2013.
5.12 Charging output test
5.12.2 Maximum constant power output test
For chargers with constant power charging function, carry out test according to
the constant power charging curve as declared by the manufacturer.
5.12.3 Power control test
For the charger connection test system with power control, the input voltage is
Maximum constant power range
the rated value; the current maximum output power is set by the upper-level
monitoring system or the charger to be 25%, 50%, 75% of the rated output
power or it is set according constant power charging strategy as declared by
the manufacturer. The current maximum constant power range shall meet the
requirements of 5.12.2, meanwhile the absolute value of the actual output
power error shall not be greater than 2% of the output power of the current
constant power range.
5.12.4 Test of low voltage auxiliary power
For chargers with auxiliary power, the auxiliary power��s voltage shall be (12 ��
0.6) V; the rated current of the auxiliary power shall be 10 A.
5.12.5 Test of current-regulated precision
Connect the charger to the test system and set it to run under constant current.
Set the output current value. When the input voltage is adjusted to 85%, 100%,
115% of the rated value, adjust the output voltage to be within the range of the
upper and lower limits.
5.14 Protocol conformance test
Connect the charger to the test system and carry out the test according to the
method specified in GB/T 34658-2017.The test results shall meet the relevant
requirements of GB/T 27930-2015 and GB/T 34658-2017.For a multi-charger,
a protocol consistency test shall be performed for each vehicle interface.
5.15 Control guidance test
5.15.1 Test of charge control state
Connect the charger to the test system and carry out the test in accordance
with the method specified in 6.3.2 of GB/T 34657.1-2017.The test results shall
meet the requirements of the corresponding conformity assessment. For a
multi-charger, each vehicle interface shall be tested separately, meanwhile the
control guidance function of each interface shall run independently and be
completely isolated.
5.15.7 Test of output impulse current
Connect the charger to the test system. When the charger closes K1 and K2
(such as entering the charging stage after pre-charging, resuming the charging
state from the suspended state (for the charger whose K1 and K2 need to be
opened in the suspended state), the impulse current (peak value) shall be
controlled below 20 A.
5.15.10 Double protection function test of battery
Connect the charger to the test system. During the charging process, the
simulated external voltage exceeds the maximum allowable charging voltage
of the vehicle, or the simulated output current is greater than the current request
current of the vehicle. Check that the charger shall disconnect the contactors
K1 and K2 within 1 s and issue and alarm prompt.
5.15.11 Test of mismatch of maximum allowable total voltage of vehicle
Connect the charger to the test system to simulate that the maximum allowable
charging voltage in the vehicle��s handshake message is less than the minimum
output voltage of the charger. Start charging. The charger shall stop the
insulation detection process and issue an alarm prompt.
5.15.12 Test of charge request greater than battery parameter
Connect the charger to the test system. During the charging process, when the
battery charging request parameter sent by the simulation software of vehicle��s
battery management system is greater than the maximum allowable charging
voltage and / or the maximum allowable charging current of the vehicle, the
charger shall stop charging and issue an alarm prompt.
5.19 Mechanical strength test
Carry out test in accordance with the provisions of GB/T 2423.55-2006.The
severe impact energy is 20 J. The equivalent mass of the impact element is 5
kg. The drop height is 0.4 m. Select 3 different locations on the vertical surface
of each support part of the charger to perform the pendulum test; then select 3
different locations on the horizontal plane of the charger to perform the vertical
drop weight test. After the test, the resistance to damp heat of the charger shall
not be reduced; the protection level is not affected; the operation and locking
points of the door shall not be damaged; the live parts will not contact the
housing due to deformation. After the mechanical strength test, carry out the
protection level test and cyclic damp heat test.
5.20 Protection level test
5.20.1 Test of preventing solid foreign matter from entering
Perform the test of preventing solid foreign matter from entering the charger
shell according to the method of GB/T 4208.
5.24 High temperature test
Place the charger in an environmental test box. According to the requirements
of GB/T 2423.2-2008 "Test Ad. High temperature test requirements for
temperature gradient of heat dissipation test sample��, at the test temperature
of 50 ��C, after the environmental test box reaches the test temperature and it is
stable, set the load according to the parameters of the charging interface to run
it stably, to check that the charger shall work normally.
5.25 Cyclic damp heat test
Place the charger in the environmental test box. According to the requirements
of GB/T 2423.4-2008 "Test Db. Cyclic damp heat (12h + 12h cycle)��, at the test
temperature of 40 ��C and 2 cycles, at 2 h before the end of the damp heat test,
carry out retest of the insulation resistance and dielectric strength.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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