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NB/T 10641-2021: Testing equipment on-site for off-board charger of electric vehicle
NB/T 10641-2021
NB
ENERGY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 17.220
CCS N 29
Testing equipment on-site for off-board charger of electric
vehicle
ISSUED ON: APRIL 26, 2021
IMPLEMENTED ON: OCTOBER 26, 2021
Issued by: National Energy Administration
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Basic composition ... 5
5 Technical requirements ... 6
5.1 Environmental conditions ... 6
5.2 Mechanical requirements ... 6
5.3 Electrical requirements ... 7
5.4 Electromagnetic compatibility requirements ... 7
5.5 Measurement performance requirements ... 8
5.6 Interface requirements ... 9
5.7 Functional requirements ... 10
6 Test methods ... 11
6.1 Environmental test ... 11
6.2 Mechanical performance test ... 12
6.3 Electrical performance test ... 13
6.4 Electromagnetic compatibility test ... 14
6.5 Measurement performance test ... 16
6.6 Interface test ... 19
6.7 Functional requirements ... 19
7 Inspection rules ... 20
7.1 Inspection classification ... 20
7.2 Type inspection ... 20
7.3 Exit-factory inspection ... 21
8 Marking and packaging ... 22
8.1 Marking ... 22
8.2 Packaging ... 22
Appendix A (Informative) Communication protocol between testing equipment on-site
for off-board charger and load ... 23
Testing equipment on-site for off-board charger of electric
vehicle
1 Scope
This document specifies the basic composition, technical requirements, test methods,
inspection rules, marking, packaging and other requirements of the testing equipment
on-site for off-board charger of electric vehicle (hereinafter referred to as “testing
equipment”).
This document applies to newly manufactured testing equipment on-site for off-board
charger of electric vehicle.
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements of this document. For dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
GB/T 2423.1, Environmental testing - Part 2: Test methods - Tests A: Cold
GB/T 2423.2, Environmental testing - Part 2: Test methods - Tests B: Dry heat
GB/T 2423.4, Environmental testing for electric and electronic products - Part 2:
Test method - Test Db: Damp heat, cyclic (12h+12h cycle)
GB/T 4208-2017, Degrees of protection provided by enclosure (IP code)
GB/T 5169.11, Fire hazard testing for electric and electronic products - Part 11:
Glowing/hot-wire based test methods - Glow-wire flammability test method for end-
products (GWEPT)
GB/T 17215.211-2006, Electricity metering equipment (a.c.) - General requirements,
tests and test conditions - Part 11: Metering equipment
GB/T 17626.2-2018, Electromagnetic compatibility - Testing and measurement
techniques - Electrostatic discharge immunity test
GB/T 17626.4-2018, Electromagnetic compatibility - Testing and measurement
techniques - Electrical fast transient/burst immunity test
GB/T 17626.8-2006, Electromagnetic compatibility (EMC) - Part 8: Testing and
measurement techniques - Power frequency magnetic field immunity test
GB/T 18487.1-2015, Electric vehicle conductive charging system - Part 1: General
requirements
GB/T 18487.2, Electric vehicle conductive charging system - Part 2: EMC
requirements for off-board electric vehicle supply equipment
GB/T 20234.3-2015, Connection set for conductive charging of 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 34657.1, Interoperability test specifications of electric vehicle conductive
charging - Part 1: Supply equipment
GB/T 34658, Conformance test for communication protocols between off-board
conductive charger and battery management system for electric vehicle
NB/T 33001, Specification for electric vehicle off-board conductive charger
3 Terms and definitions
Terms and definitions determined by GB/T 18487.1-2015, GB/T 18487.2, GB/T 29317
and NB/T 33001, as well as the following, are applicable to this document.
3.1
testing equipment on-site for off-board charger of electric vehicle
Device for on-site testing of off-board charger performance.
4 Basic composition
The testing equipment is composed of a vehicle DC charging interface circuit simulator,
a DC standard electric energy meter, a power interface, a control unit, a human-
computer interaction module, a clock unit, a waveform and protocol analysis module,
etc., as shown in Figure 1.
5.2.2 Heat resistance and flame retardancy
The testing equipment shall be able to withstand the glow-wire test, and shall not catch
fire after being subjected to the test method in GB/T 5169.11.
Test severity: The test temperature is 650 °C ± 10 °C, and the action time is 30 s ± 1 s.
5.2.3 Enclosure protection grade
The enclosure protection grade of the testing equipment shall not be lower than the
requirements of IP30 in GB/T 4208-2017.
5.2.4 Earthing terminal
The testing equipment shall have a protective earthing terminal with an obvious
earthing mark, and shall have a reliable electrical connection with an accessible metal
enclosure. The electric conductor of the terminal shall be made of copper; the surface
shall be anti-corrosion treated; the diameter of the thread shall not be less than 5 mm.
5.3 Electrical requirements
5.3.1 Power supply
The AC power supply is required as follows:
a) rated voltage: single-phase 220 V, allowable deviation -15% ~ +10%;
b) frequency: 50 Hz, allowable deviation ±0.5 Hz;
c) waveform: sine, waveform distortion factor not greater than 5%.
5.3.2 Insulation resistance
The insulation resistance between non-electrically connected live circuits and between
each independent live circuit and the ground (metal enclosure) shall not be less than 10
MΩ.
5.3.3 Dielectric strength
The testing equipment shall be able to withstand the test of 6.3.3 without breakdown,
flashover and component damage.
5.4 Electromagnetic compatibility requirements
5.4.1 Electrostatic discharge immunity
The testing equipment shall be able to withstand the electrostatic discharge immunity
test of severity grade 3 specified in Table 1 of GB/T 17626.2-2018. After the test, the
5.6.2 Power pulse input interface
The testing equipment shall have an electric energy pulse input interface for electric
energy measurement calibration. The low level of the pulse signal is 0 V ~ 0.7 V, and
the high level is 3.5 V ~ 24 V. The input impedance shall be greater than 10 kΩ, and the
interface should be compatible with passive pulse signals.
5.6.3 Power pulse output interface
The testing equipment shall have an electric energy pulse output interface for electric
energy measurement calibration. The lower level of the output pulse signal is 0 V ~ 0.4
V, and the high level is 4.75 V ~ 24 V.
5.6.4 Auxiliary interface
It can be equipped with charging communication (S+, S-) interface, low-voltage
auxiliary power supply (A+, A-) interface, charging connection confirmation (CC1,
CC2) signal lead-out interface, grounding (PE) signal lead-out interface, DC power
supply (DC+, DC-) lead-out interface. If there is a DC power lead-out interface, the
interface shall be protected against accidental collision.
5.7 Functional requirements
5.7.1 Control guide circuit simulation
The testing equipment shall have the vehicle control guide circuit simulation function.
The electrical components include resistors R4, R5 and pull-up voltage U2. The
resistance of resistor R4 is adjustable. The circuit shall comply with the requirements
of Appendix B.1 of GB/T 18487.1-2015.
5.7.2 Connection loop on-off state simulation
The testing equipment shall have the simulation function of the on-off state of the
connection loop, with loop on-off switches PE, S+, S-, CC1, CC2, A+, A-, and vehicle
contactors K5, K6, which can simulate the abnormal conditions of vehicle charging
control sequence and switch disconnection. The testing equipment shall meet the test
requirements such as connection confirmation, charging connection control timing, and
vehicle interface disconnection specified by GB/T 34657.1.
5.7.3 Signal acquisition
The testing equipment shall have the acquisition function of signals from various
channels. The charging pile side of the DC+, DC-, PE, S+, S-, CC1, CC2, A+, A- loop
on-off switches and the vehicle side of the DC+, DC- on-off switches shall be provided
with voltage signal acquisition interfaces. The DC+, DC- major loop and the A+, A-
auxiliary power supply loop shall be equipped with current acquisition interfaces
(voltage type), which shall meet the acquisition requirements of GB/T 34657.1 on the
DC output voltage, DC output current, CAN signal voltage, auxiliary power supply
voltage, auxiliary power supply current, detection point 1 voltage, detection point 2
voltage, vehicle battery voltage and other signals of the charging pile.
5.7.4 Insulation state simulation
The testing equipment shall have an insulation state simulation function and a charging
major loop insulation state simulation function, which can at least simulate asymmetric
insulation faults between DC+ and PE or between DC- and PE in the charging DC loop,
and symmetrical insulation faults between DC+ and PE and between DC- and PE. The
testing equipment shall meet the insulation fault test requirements specified in GB/T
34657.1.
5.7.5 Battery voltage simulation
The testing equipment shall have a battery voltage simulation function and meet the
requirements of self-inspection stage test, charging readiness test, and output voltage
exceeding the vehicle’s allowable value test specified in GB/T 34657.1.
5.7.6 Vehicle BMS simulation
The testing equipment shall have the vehicle BMS simulation function. The
communication protocol of the vehicle BMS simulation software shall comply with the
regulations for BMS in GB/T 27930. The interoperability test cases shall meet the
standard test requirements in GB/T 34657.1. The protocol consistency test cases shall
meet the standard test requirements in GB/T 34658.
6 Test methods
6.1 Environmental test
6.1.1 High-temperature test
Put the testing equipment into the environmental test chamber, according to the
requirements of GB/T 2423.2, Test Bd, at the test temperature of 50 °C± 2 °C. After the
temperature of the test sample reaches a stable state, the device shall work normally,
and the measurement accuracy shall comply with the requirements of Table 3.
6.1.2 Low temperature test
Put the testing equipment into the environmental test chamber, according to the
requirements of GB/T 2423.1, Test Ad, at the test temperature of -20 °C ± 3 °C. After
the temperature of the test sample reaches a stable state, the device shall work normally,
and the measurement accuracy shall comply with the requirements of Table 3.
6.1.3 Damp heat resistance performance test
Put the testing equipment into the environmental test chamber, according to the
requirements of GB/T 2423.4, test Db, at the test temperature of 40 °C, for 2 cycles.
Conduct a retest of insulation resistance and dielectric strength 2 hours before the end
of the damp heat test. The insulation resistance shall not be less than 1 MΩ, and the
dielectric strength shall apply a measurement voltage of 75% of the required value.
After the test, return to normal environmental conditions, and check that the equipment
shall work normally after power-on.
6.2 Mechanical performance test
6.2.1 Enclosure test
6.2.1.1 Static thrust
The equipment shall be firmly fixed on a rigid support surface and withstand a thrust
of 30 N. The thrust shall be applied through the hemispherical end of a rigid rod of 12
mm in diameter, and shall be applied to every part of the enclosure which is accessible
when the equipment is ready for use and whose deformation may cause a hazard.
6.2.1.2 Dynamic impact
The equipment shall be firmly fixed on the rigid support surface, and a steel ball with a
diameter of 50 mm and a mass of 500 g ± 25 g shall be freely dropped from a height of
1 m. A maximum of 3 points shall be applied to any location on the surface that may be
touched during normal use and that may cause a hazard if damaged.
6.2.1.3 Vibration test
The equipment shall be subjected to the vibration test of the following severities in non-
working and unpackaged conditions. After the test, the equipment shall be able to
operate normally without damage or information changes.
-- frequency range: 10 Hz ~ 150 Hz;
-- crossover frequency: 60 Hz;
-- When the frequency is less than 60 Hz, the constant displacement amplitude is
0.075 mm;
-- When the frequency is greater than 60 Hz, the constant acceleration is 10 m/s2 (1.0
g);
-- number of sweep-frequency cycles: 10.
6.2.1.4 Drop test
e) If the enclosure of the testing equipment is made of metal material, contact
discharge should be used for direct discharge; if the enclosure of the testing
equipment is made of insulating material, air discharge should be used for direct
discharge.
f) The number of discharges at each test point: more than 10 times for positive and
negative polarities; the interval between discharges is at least 1 s.
g) The testing equipment is in working condition.
6.4.2 Power frequency magnetic field immunity test
The test shall be carried out in accordance with the provisions of GB/T 17626.8-2006,
and the test shall be carried out under the following conditions:
a) severity: grade 5, continuous magnetic field 100 A/m;
b) magnetic field duration: 60 s;
c) magnetic field frequency: 50 Hz;
d) magnetic field directions: X, Y, Z;
e) inspection methods: immersion method and proximity method;
f) test...