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NB/T 33008.1-2018: Inspection and test specifications for electric vehicle charging equipment - Part 1: Off-board charger Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid NB/T 33008.1: Historical versions
Similar standardsNB/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 ContentsForeword... 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... 501 ScopeThis 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 referencesThe 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.General3 Terms and definitionsThe 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 rules4.1 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 methods5.1 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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