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NB/T 33008.1-2018 English PDF (NBT33008.1-2018)

NB/T 33008.1-2018 English PDF (NBT33008.1-2018)

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NB/T 33008.1-2018: Inspection and test specifications for electric vehicle charging equipment. Part 1: Off-board charger

This part specifies the inspection rules and test methods for the off-board charger of electric vehicle. 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.
NB/T 33008.1-2018
ENERGY INDUSTRY STANDARD OF
THE PEOPLE 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 ???; 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:
??I - 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:
??I - 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 tes...

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