NB/T 33008.1-2018 (NB/T33008.1-2018, NBT 33008.1-2018, NBT33008.1-2018) & related versions
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Inspection and test specifications for electric vehicle charging equipment. Part 1: Off-board charger
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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
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
Inspection and test specifications for electric vehicle
charging equipment - Part 1: Off-board charger
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
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 20234.1-2015 Connection set for conductive charging of electric
vehicles - Part 1: General requirements
GB/T 20234.3-2015 Connection set for conductive charging of electric
vehicles - Part 3: DC charging coupler
GB/T 27930-2015 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
GB/T 34657.1-2017 Interoperability test specifications of electric vehicle
conductive charging - Part 1: Supply equipment
GB/T 34658-2017 Conformance test for communication protocols between
off-board conductive charger and battery management system for electric
vehicle
NB/T 33001-2018 Specification for electric vehicle off-board conductive
charger
IEC 61851-23 Electric vehicle conductive charging system - Part 23: Electric
vehicle charging station (2nd edition, committee draft, CD)
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:
peak value.
5.1.4 Requirements for test instrument
Unless otherwise specified, the instruments used in the test shall meet the
following requirements:
a) The measuring instruments and meters used shall pass the metrological
verification or calibration; the certificate shall be valid;
b) The measuring range of measuring instruments and meters shall cover
the measuring range being measured;
c) The measurement uncertainty of the test instrument, meter or system shall
be better than 1/3 of the allowable error being measured;
d) The measured value shall be more than 1/5 of the range of the selected
instrument and meter.
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:
a) When using a current sensor, it shall ensure that the environmental
conditions meet the requirements for use; take isolation and protection
measures when necessary;
b) It shall select the current sensor with suitable range.
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.
5.2.2 Marking inspection
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
5.3.1 Test of charge control function
Follow the steps below to perform a charge control function test:
a) Connect the charger to the test system, to check the charger, which shall
be able to dynamically adjust the charging output based on the data
provided by the vehicle battery management system’s simulation software,
perform corresponding actions according to the set parameters, to control
the charging process and complete the charging automatically.
b) When the charger with manual charging control function is being
debugged or maintained without being connected to a higher-level
monitoring system or operation management system and the vehicle,
check that the charger shall manually set the charging parameters in the
manner declared by the manufacturer, implement charging start-stop
operation, to complete the charging process.
5.3.2 Communication function test
For chargers that have the communication function with the higher-level
monitoring system or operation management system as specified by the
manufacturer, connect the test system. During the charging process, check that
the charger shall be able to communicate according to the agreed protocol
requirements.
5.3.3 Test of insulation testing function
Connect the charger to the test system and perform the test according to the
following steps:
a) Before the insulation test, the absolute value of the voltage outside the
simulation K1 and K2 is greater than 10 V, check that the charger shall
stop the insulation test process and issue an alarm prompt;
b) Check that the charger end is provided with an insulation detection circuit,
meanwhile after the vehicle interface is connected and before the vehicle’s
charging circuit contactors K5 and K6 are closed, the charger shall be able
to close the DC output circuit’s contactors K1 and K2, to perform insulation
testing of its interior (including the charging cable). The insulation test
voltage shall meet the requirements of B.3.3 in GB/T 18487.1-2015;
c) Simulate insulation failure and insulation abnormality according to the
detection process), the charger's electronic lock shall be reliably locked; it
shall neither be unlocked with power on, nor be unlocked manually.
c) When the simulating the failure to continue charging and the completion
of charging, the voltage of the vehicle interface shall be reduced below
60V DC when the electronic lock is released.
d) The electronic lock device shall have an emergency unlocking function.
5.3.6 Test of pre-charge function
Connect the charger to the test system. During the charging configuration
phase, before K5 and K6 are closed, simulate the normal vehicle-side battery
voltage (the error range between the K1 and K2 outside voltage and the voltage
of communication message battery is ≤ ±5% and it is in the normal output
voltage of the charger). Close K5 and K6; check that the charger shall adjust
the output voltage inside K1 and K2 to the current battery voltage minus 1 V ~
10 V after detecting the normal vehicle-side battery voltage; then close K1 and
K2.
5.3.7 Test of display function
Connect the charger to the test system to simulate standby status, charging
status, fault or alarm status, etc., check that the display information or status of
the charger shall comply with the provisions of 6.7.1 in NB/T 33001-2018;
meanwhile the display characters are clear and complete, without defects.
Chargers with manual charging control functions shall be able to display manual
input information.
5.3.8 Test of input function
For the charger with manual input and control functions, connect the test system;
set the charger’s charging parameters; check that the charger shall correctly
enter the charging process and perform the setting operation. During the
charging process, simulate the start-stop operation and check that the charger
shall start or stop charging properly.
5.3.9 Test of measurement function
For chargers equipped with electric energy meters, the energy measurement
function of the chargers shall meet the requirements of GB/T 29318.
5.3.10 Test of emergency stop function
Follow these steps to test:
a) Check that the charger shall be equipped with an emergency stop device
Connect the charger to the test system and set it to run under the rated load.
Use methods such as filter clogging, cooling fan failure, or other failure methods,
to simulate the internal temperature of the charger exceeding the over-
temperature protection value. Check the charger that shall reduce the output
power or cut off DC output and alarm alert.
5.4.6 Test of door-open protection
Connect the charger with a maintenance door that can cause the live parts to
be exposed when the door is opened to the test system, to carry out test
according to the following steps:
a) Before charging, open the charger’s door and check the charger, it shall
not be able to start charging;
b) During the charging process of the integrated charger, the simulation door
is opened, the charger shall cut off the power supply input and DC output
at the same time;
c) During the charging process of the split type charger, the simulation door
is opened, the charger shall cut off the power input or output of the
corresponding part.
5.4.7 Test of starting emergency stop device
Connect the charger to the test system and set it to run under the rated load.
Start the emergency stop device. The charger shall disconnect K1 and K2 within
100 ms, meanwhile the vehicle’s interface voltage shall not exceed 60VDC
when the electronic lock is unlocked.
5.4.8 Test of input current overshoot
Connect the charger to the test system and set it to run under the rated load.
When the charger enters the charging phase and starts to output, use a
measuring instrument to record the peak input current of the charger; check
that the peak current of the charger shall not exceed 110% of the rated input
current .
5.4.9 Reverse connection test of battery
Connect the charger to the test system. Before the configuration phase of
charging parameter, simulate reversing the power battery and the charger’s
anode and cathode. Close K5 and K6. The charger shall allow to charge and
issue an alarm.
5.4.10 Test of anti-backflow function
The main circuit (chart) of the charger or the configured power conversion unit
gauge or Vernier caliper. Meanwhile it must have a grounding sign.
b) Doors, covers, shroud plate and similar parts of chargers shall be
connected to the charger’s main frame by protective conductors. The
cross-sectional area of the protective conductors measured by a gauge or
Vernier shall not be less than 2.5 mm2.
c) When measured by electric bridge, grounding resistance tester or digital
low resistance tester, the resistance between any point that shall be
grounded and the total ground in the charger shall not be greater than 0.1
Ω; the number of measurement points shall not be less than 3. If anti-
corrosion paint is coated at the measurement point, it requires removing
the anti-corrosion paint to expose the non-insulating material to carry out
test. The grounding terminal shall have obvious signs.
d) Check that the internal working grounding and protective grounding of the
charger shall be independent of each other. They shall be directly
connected to the grounding conductor (copper bar), respectively. Multiple
grounding electrical devices shall not be connected in series in one
grounding wire.
5.12 Charging output test
5.12.1 Selection of test points
The charging output test of the charger without constant power charging
function and with constant power charging function shall be tested at the test
points given in Table 4 and Table 5, respectively (this test point refers to the
combination of input voltage, output voltage, output current points ). The
reference diagram of test point is as shown in Figure 3. According to the
charging strategy specified in the manufacturer's declaration or product
specification, it may add other test points during the test.
For a multi-charger with a charging module multiplexing method, only the
vehicle interface with the maximum output power is tested in accordance with
the test points given in Table 4 or Table 5. For a multi-charger that does not use
the charging module multiplexing method, each vehicle interface shall be tested
according to the test points given in Table 4 or Table 5 by the use of the charging
strategy specified in the manufacturer's statement or product specification.
Xrip - Voltage ripple factor
Upp - Peak-to-peak AC component of output voltage;
UDC - Average of DC output voltage.
5.12.8 Current ripple test
Connect the charger to the test system, the load is a battery simulation device,
the input voltage is a rated value; it is set to run at a constant current state. Set
the output current to be within the rated output current and the maximum output
current (only for the charger with constant power charging function), to
respectively measure the DC output current and the peak-to-peak value of the
AC component of the output current. The requirements for the oscilloscope for
the current ripple test: the bandwidth is at least 20 MHz; the horizontal scanning
speed is at least 1 MS/s; the record length is at least 1M points; the record width
is at least 1.1 s. Current probe requirements: The rated current must reach at
least the maximum output current of the charger; the frequency band width must
be at least 300 kHz; the measurement accuracy must be ± 1%. The current
ripple shall comply with 7.7.7 of NB/T 33001-2018.
5.12.9 Test of setting error of output current
Connect the charger to the test system and set it to run in a constant current
state. The input voltage is the rated value. The output current is set to be within
20% of the rated output current to the maximum output current. Adjust the
output voltage to be the median within the range of the upper limit and lower
limit, to respectively measure the output current Iz of the charger. When the
output current set by the charger is greater than or equal to 30 A, the output
current error shall not exceed 1%; when the output current set by the charger
is less than 30 A, the output current error shall not exceed ± 0.3 A.
The measured output current error is calculated according to formula (4).
Where:
ΔI - Output current error
Iz - The measured value of the output current when the AC input voltage is
the rated value and the output voltage is at the median of the upper and
lower limits;
I20 - Set output current.
5.12.10 Test of setting error of output voltage
method specified in 6.3.5.4 of GB/T 34657.1-2017. The test results shall meet
the requirements of the corresponding conformity assessment.
5.12.15 Start output overshoot test
Connect the charger to the test system. After entering the charging stage after
pre-charging or after resuming the charging state from the suspension state,
use a measuring instrument to record the peak voltage and current of the
charger output. In the process of entering the charging process in voltage-
regulated state, check the overshoot of the output voltage of charger shall not
exceed 5% of the voltage request in the charging request message of battery.
In the process of entering the charging process in current-regulated state, the
current request in the charging request message of battery is more than or
equal to 30 A, check that the output current overshoot shall be not more than
5% of the request value. When the request current is less than 30 A, check that
the output current overshoot shall be not more than 1.5 A.
5.12.16 Test of measurement error of output current
Connect the charger to the test system and set it to run under constant current.
The input voltage is the rated value. Set the output current in the charging
request message to be within the range of 20% of the rated output current to
the maximum output current. Adjust the output voltage to be the median of the
range of the upper limit and lower limit. Respectively measure the actual output
current Im of the charger; record the current output value Icm of the charging
state message of charger. The measurement error of output current shall be not
more than ± (1.5%Im + 1) A.
The measurement error of output current is calculated according to formula (6).
Where:
ΔI - Measurement error of output current, in amps (A);
Icm - Output current in the charging state message of the charger, in amps
(A);
Im - The measured value of actual output current charger, in amperes (A).
5.12.17 Test of measurement error of output voltage
Connect the charger to the test system and set it to run under constant voltage.
The input voltage is the rated value. Set the output voltage value in the charging
request message to be within the range of rated output voltage. Adjust the load
current to be 50% of the rated output current. Respectively measure the actual
output voltage Um of the charger; record the output voltage Ucm in the charging
Connect the charger to the test system and carry out the test according to the
method specified in 6.3.3 of GB/T 34657.1-2017. The test results shall meet the
requirements of the corresponding conformity assessment.
5.15.3 Test of limit value of control pilot voltage
Connect the charger to the test system and carry out the test according to the
method specified in 6.3.6 of GB/T 34657.1-2017. The test results shall meet the
requirements of the corresponding conformity assessment.
5.15.4 Test of communication interruption
Connect the charger to the test system and perform the test in accordance with
the method specified in 6.3.4.1 of GB/T 34657.1-2017. The test results shall
meet the requirements of the corresponding conformity assessment.
5.15.5 Test of continuity of protective earth conductor
Connect the charger to the test system and perform the test in accordance with
the method specified in 6.3.4.6 of GB/T 34657.1-2017. The test results shall
meet the requirements of the corresponding qualification assessment.
Meanwhile the vehicle interface’s voltage shall not exceed 60V DC when the
electronic lock is unlocked.
5.15.6 Test of disconnection of connection detection signal
Connect the charger to the test system and carry out the test according to the
methods specified in 6.3.4.2 and 6.3.4.3 of GB/T 34657.1-2017. The test results
shall meet the requirements of the corresponding conformity assessment,
meanwhile the voltage of the vehicle interface shall not exceed 60V DC when
the electronic lock is unlocked.
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.
5.15.8 Test of inconsistency between battery voltage and communication
message
Connect the charger to the test system. During the configuration phase of
charging parameter, the simulated absolute value of the difference between the
external voltages of K1 and K2 and the current battery voltage of the vehicle's
power battery in the communication message to be greater than 5% of the
current battery voltage of the vehicle's power battery. Close K5 and K6. The
environment).
5.20.2 Test of preventing water from entering
Test of preventing water from entering the charger shell according to the method
of GB/T 4208.
a) Chargers for outdoor use or indoors exposed to a polluted industrial
environment meet the requirements of IPX4. It can be subjected to swing
pipe water spray test or sprinkler water spray test. After the test, check
that there is no obvious stagnant water in the charger case, or there is
water but it does not affect the normal operation or damage the safety of
the charger, meanwhile the charger operates normally after being
powered on.
1) Swing pipe water spray test. Place the charger under the swing pipe,
so that the swing pipe sprays water within ± 180° of the vertical direction;
the maximum radius of the swing pipe is 1.6 m. The maximum distance
between the charger and the swing pipe is 0.2 m. The flow rate of each
hole of the swing pipe is 0.07 L/min. The test lasts for 10 min.
2) Spray head water test. Use the sprinkler to perform a water spray test
on the charger. The water flow rate is 12.5 L/min; the pressure is in the
range of 50 kPa ~ 150 kPa. During the test, the pressure shall be kept
constant. The sprinkler needs to remove the baffle of the balance
weight, so that the charger shell is exposed to water in all possible
directions. The test time is calculated based on the surface area of the
charger shell, which is 1 min/m2, at least 5 min.
b) The charger for indoor use meets the requirements of IPX2. The charger
is fixed on the dripping platform. The shell is inclined at 15° from the
perpendicular line on two mutually perpendicular planes at four fixed
positions. The drip flow is 3 mm/min. The test is continued at each inclined
position for 2.5 minutes. After the test, check that there is no obvious water
accumulation, or there is water but it does not affect the normal operation
or damage the safety of the charger, meanwhile the charger operates
normally after being powered on.
c) For split-type chargers, perform the above-mentioned corresponding tests
according to the specific installation requirements of different cabinets
(outdoor or indoor use or indoor exposure to a polluted industrial
environment).
5.21 Salt spray test
Perform the test according to the method of GB/T 2423.17-2008. Before the
test, clean the printed circuit boards, connectors and other components in the
Note: Normal operation means that the charging, communication, display and various
protection functions of the charger shall be normal; it does not allow function loss,
same as below.
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. After the test temperature
continues for 2 hours, perform the current-regulated precision test in the test
environment according to the method specified in 5.12.5.
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. The
insulation resistance shall not be less than 1 MΩ; apply the measurement
voltage at 75% of the required dielectric strength. After the test, return to normal
atmospheric conditions in the environmental box. After power on, check that the
charger shall be able to work normally.
5.26 Electromagnetic compatibility test
5.26.1 Overview
The charger shall meet the electromagnetic compatibility test, immunity
requirements and emission requirements as specified in this Chapter. All EMC
test items as specified in this Chapter can be tested in any order. The EMC
requirements in this part are based on the port of the charger and the installation
and use environment. Charger’s ports are mainly divided into shell ports, AC
power input ports, signal/control ports, wired network ports, conductive power
transmission ports (hereinafter referred to as CPT ports). The definition of each
port is detailed in 3.1 of GB/T 18487.2-2017. The manufacturer shall state the
installation and use environment of the charger. When the manufacturer does
not specify the environment in which the charger is intended to be used, the
most stringent emission and immunity tests shall be performed, that is, the
lowest emission limit and the highest level of immunity test shall be used.
5.26.2 Immunity test
All tests shall use a typical charger and communication cable (at the CPT port)
provided by the manufacturer. If the charger does not provide a cable, the test
......
| Standard ID | NB/T 33008.1-2018 (NB/T33008.1-2018) | | Description (Translated English) | Inspection and test specifications for electric vehicle charging equipment. Part 1: Off-board charger | | Sector / Industry | Energy Industry Standard (Recommended) | | Classification of Chinese Standard | K81 | | Classification of International Standard | 29.200 | | Word Count Estimation | 36,351 | | Date of Issue | 2018-12-25 | | Date of Implementation | 2019-05-01 | | Older Standard (superseded by this standard) | NB/T 33008.1-2013 | | Quoted Standard | GB/T 2421.1-2008; GB/T 2423.1-2008; GB/T 2423.2-2008; GB/T 2423.4-2008; GB/T 2423.17-2008; GB/T 2423.55-2006; GB/T 4208; GB 4824-2013; GB/T 7251.1-2013; GB 17625.1; GB/T 17625.2; GB/T 17625.7; GB/T 17625.8; GB/T 17626.2; GB/T 17626.3; GB/T 17626.4 | | Drafting Organization | State Grid Corporation | | Administrative Organization | Energy Industry Electric Vehicle Charging Facilities Standardization Technical Committee | | Regulation (derived from) | National Energy Administration Announcement No.16 of 2018 | | Summary | This standard specifies the inspection rules and test methods for electric vehicle non-vehicle chargers (hereinafter referred to as chargers). This part is applicable to the type test, factory inspection and arrival acceptance of the charger. This section applies to the charger specified in NB/T 33001-2018. | | Standard ID | NB/T 33008.1-2013 (NB/T33008.1-2013) | | Description (Translated English) | Inspection and test specifications for electric vehicle charging equipment. Part 1: off-board charger | | Sector / Industry | Energy Industry Standard (Recommended) | | Classification of Chinese Standard | K81 | | Classification of International Standard | 29.200 | | Word Count Estimation | 20,245 | | Quoted Standard | GB/T 2421.1-2008; GB/T 2423.1-2008; GB/T 2423.2-2008; GB/T 2423.4-2008; GB/T 2423.55; GB 4208; GB 9254; GB 17625.1-2003; GB/Z 17625.6-2003; GB/T 17626.2; GB/T 17626.3; GB/T 17626.4; GB/T 17626.5; GB/T 17626.11; GB/T 20234.3-2011; GB/T 29316-2012; GB/T 293 | | Drafting Organization | State Grid Corporation | | Administrative Organization | Energy industry electric vehicle charging facilities for Standardization Technical Committee | | Regulation (derived from) | National Energy Board Notice 2013 No. 6; industry standard for filing Notice No. 2 of 2014 (No. 170 overall) | | Summary | This standard specifies the EV-board charger (hereinafter referred to as the charger) test conditions, test equipment, test rules, test items, test methods. This standard applies to charging model type testing, factory inspection, arrival and acceptance. |
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