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Technical specification for on-board static DC electric energy meter of electric vehicle
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GB/T 36277-2018: PDF in English (GBT 36277-2018) GB/T 36277-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.120.01
K 30
Technical specification for on-board static
DC electric energy meter of electric vehicle
ISSUED ON. JUNE 07, 2018
IMPLEMENTED ON. JANUARY 01, 2019
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 4
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Technical requirements ... 8
4.1 Standard power value ... 8
4.2 Climatic conditions ... 8
4.3 Mechanical and structural requirements ... 9
4.4 Wiring and installation requirements ... 11
4.5 Power supply mode ... 11
4.6 Accuracy requirements ... 11
4.7 Electrical performance ... 13
4.8 Functional requirements ... 14
4.9 Electromagnetic compatibility ... 17
4.10 Salt spray resistance performance ... 17
4.11 Industrial solvent resistance performance ... 17
4.12 Security ... 17
4.13 Reliability ... 17
5 Test items and methods ... 17
5.1 Reference conditions ... 17
5.2 Visual inspection ... 18
5.3 Climate impact test ... 18
5.4 Mechanical requirement test ... 18
5.5 Accuracy requirement test ... 20
5.6 Electrical performance test ... 22
5.7 Function check ... 23
5.8 Electromagnetic compatibility test ... 25
5.9 Salt spray resistance test ... 26
5.10 Industrial solvent resistance test ... 26
5.11 Communication protocol consistency ... 26
5.12 Data security testing ... 27
6 Inspection rules ... 27
6.1 Factory-exit inspection ... 27
6.2 Type inspection ... 27
7 Packaging, storage and transportation ... 28
Technical specification for on-board static
DC electric energy meter of electric vehicle
1 Scope
This Standard specifies the terms and definitions, technical requirements, test
methods, inspection rules, marking, packaging and storage of on-board static
DC electric energy meters of electric vehicle (hereinafter referred to as electric
energy meters).
This Standard applies to on-board static DC electric energy meters of electric
vehicle.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
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
4. Test method - Test Db. Damp heat, cyclic (12h + 12h cycle)
GB/T 2423.57 Environmental testing for electric and electronic products -
Part 2. Tests - Test Ei. Shock - Shock response spectrum synthesis
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 4798.1 Environmental conditions existing in the application of electric
and electronic products - Section 1. Storage (IEC 60721-3-1.1997, MOD)
GB/T 4798.2 Environmental conditions existing in the application of electric
and electronic products - Section 2. Transportation (IEC 60721-3-2.1997,
MOD)
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
GB/T 13384 General specifications for packing of mechanical and electrical
product
GB/T 17215.301 Particular requirements for multi-function electricity meters
GB/T 17215.421-2008 Electricity metering equipment (a.c.) - Tariff and load
control - Part 21. Particular requirements for time switches
GB/T 17215.701-2011 Reference meter for electrical energy
GB/T 17626.2 Electromagnetic compatibility (EMC) - Testing and
measurement techniques - Electrostatic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility - Testing and measurement
techniques - Radiated, radio-frequency, electromagnetic field immunity test
GB/T 17626.4 Electromagnetic compatibility - Testing and measurement
techniques - Electrical fast transient/burst immunity test
GB/T 17626.5 Electromagnetic compatibility - Testing and measurement
techniques - Surge immunity test
GB/T 17626.29 Electromagnetic compatibility (EMC) - Testing and
measurement techniques - Voltage dips, short interruptions and voltage
variations on d.c. input power port immunity tests
GB/T 18655 Vehicles, boats and internal combustion engines - Radio
disturbance characteristics - Limits and methods of measurement for the
protection of on-board receivers
GB/T 19836 Instrumentation for electric vehicles
DL/T 645 Multi-function watt-hour meter communication protocol
QC/T 413-2015 Basic technical conditions for automotive electrical
equipment
QC/T 29106 Technical conditions for automotive wiring harness
JJG 842 Verification regulation for DC electric energy meter
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
of materials with good transparency, and the transparent window and enclosure
shall be tightly bonded.
4.3.3 Terminals and terminal covers
The wires and terminals shall be secured in such a way as to ensure adequate
and permanent contact to prevent loosening and heat generation. All parts in
each terminal shall be guaranteed to be in contact with any other metal
component with minimal likelihood of corrosion. Terminals that are assembled
together and have different potentials shall be protected against accidental
short circuits. The electric energy meter shall have an independent sealable
terminal cover. The inside of the terminal cover shall be provided with a clear
and permanent wiring diagram, indicating the name and function of each
terminal. The terminal cover shall have sufficient insulation performance and
mechanical strength. Each terminal, screw holding the conductor, and outer or
inner conductor shall not be in contact with the terminal cover.
4.3.4 Buttons
The buttons shall be flexible and reliable; if there is a programming function,
there shall be corresponding measures to prevent unauthorized personnel from
operating.
4.3.5 Nameplate
The outer surface of electric energy meters shall have a nameplate. The
nameplate shall contain the manufacturer's name or trademark, instrument
model, year of manufacture, rated voltage, calibration current, meter constant,
accuracy grade, etc. The mark shall be clear and prevent UV radiation (above
level 7) without fading.
4.3.6 Output interfaces
4.3.6.1 Electric energy test pulse output
The electric energy meter shall have electrical pulse and optical pulse test ports
that are proportional to its electric energy. The electrical pulse shall be output
after opto-isolation, with a pulse width of 40 ms ± 10 ms. The optical pulse uses
LED as power pulse indication. The electric energy test pulse output shall be
accessible from the front.
4.3.6.2 Clock signal output
It is used to test the accuracy of the electric energy meter, and the output
frequency is 1 Hz.
d) The number of electric energy display digits is 8 digits, the factory default
is 2 decimal places, and the unit of measurement is kWh. The number of
decimal places can be selected by programming in 0 ~ 3.
4.8.6 Communication function
The communication function shall meet the following requirements.
a) The electric energy meter shall have at least one RS485 communication
interface and one modulation infrared communication interface;
b) The RS485 communication interface has an initial rate of 2400 bit/s, which
can be set by software; the modulation infrared communication interface
has a communication rate of 1200 bit/s;
c) RS485 and modulation infrared interface communication protocol shall
meet the requirements of DL/T 645 and its filing documents;
d) The electric energy meter can be equipped with CAN communication
interfaces, with the interface bit rate of 250 kbit/s, the bit time of 4 μs,
extended frame format, 29-bit identifier, meeting the requirements of
CAN2.0 B specification.
4.8.7 Storage function
The storage function shall meet the following requirements.
a) The electric energy meter can store at least the forward and reverse
electric energy data of the first 12 months, and the data transfer and
demarcation time can be set to 24 o'clock on the last day of the month or
any time from 1st to 28th of each month;
b) After the power supply of the electric energy meter is de-energized, the
stored data shall be stored for at least 10 years;
c) It shall have tamper-proof function of key information such as electric
energy.
4.8.8 Event recording
The event recording shall meet the following requirements.
a) Record the total number of programming, the last 10 programming
moments, the operator code and the programming items;
b) Record the total number of timings (excluding the broadcast timing), the
time before and after the last 10 timings.
4.8.9 Load recording
The load recording shall meet the following requirements.
a) The electric energy meter can record four types of data. voltage, current,
power and electric energy. The recording time interval can be set within
the range of 1 min ~ 60 min;
b) The load recording space shall be able to record 15 days of data capacity
for four types of data. voltage, current, power and electric energy in 1 min
time interval.
4.9 Electromagnetic compatibility
The design of electric energy meters shall meet the requirements of GB/T
19836.
4.10 Salt spray resistance performance
The salt spray resistance performance of electric energy meters shall meet the
requirements of QC/T 413-2015
4.11 Industrial solvent resistance performance
The industrial solvent resistance performance of electric energy meters shall
meet the requirements of QC/T 413-2015
4.12 Security
The security of electric energy meters shall meet the requirements of GB/T
17215.301.
4.13 Reliability
Under normal working conditions, the mean time to failures (MTTF) of electric
energy meters is not less than 2.19 × 104 h.
5 Test items and methods
5.1 Reference conditions
Without special explanation, the reference temperature is (23 ± 2) °C, the
reference relative humidity is 40 % ~ 75 %, and the reference atmospheric
pressure is 101.325 kPa (1 standard atmosphere).
Visually inspect the electric energy meter by visual inspection, which shall meet
the requirements for visual inspection in JJG 842.
a) The electric energy meter is in the non-working state;
b) Test in a state in which the analog cable (with the exposed end sealed) of
a certain length is installed;
c) The atmospheric pressure inside and outside the electric energy meter
shall be kept the same;
d) First characteristic number. 5 (IP5X).
The amount of dust entering shall not impede the operation of the electric
energy meter and weaken its dielectric strength.
5.4.6 Water proof test
Test according to the specifications of GB/T 4208 and under the following
conditions.
a) The electric energy meter is in the non-working state;
b) The atmospheric pressure inside and outside the electric energy meter
shall be kept the same;
c) Second characteristic number. 2 (IPX2).
The amount of water entering shall not impede the operation of the electric
energy meter and weaken its dielectric strength.
5.5 Accuracy requirement test
5.5.1 Basic error under reference voltage
Under the reference test conditions, when the electric energy meter is applied
with the reference voltage, the basic error measured shall meet the
requirements of 4.6.1.
5.5.2 Basic error under reference current
Under the reference test conditions, when the electric energy meter is applied
with the reference current, the basic error measured shall meet the
requirements of 4.6.2.
5.5.3 DC ripple effect
Under the reference voltage and 50 % of the maximum current, the following
tests shall be carried out, and the errors caused by each test shall meet the
requirements of 4.6.3.
The test shall be carried out in accordance with the specifications of GB/T
17215.701-2011, and the measured results shall meet the requirements of
4.7.2 of this Standard.
5.6.3 Voltage dip and short interruption test of DC power supply
The meter shall be subjected to the following tests in accordance with GB/T
17626.29.
During the test, the voltage measurement line is connected to the reference
voltage (the rated voltage is applied with the power supply line of Type A
meters), and the current line has no current.
a) Voltage interruption, voltage dip amplitude ΔU = 100 %
● Interruption time. 1 s;
● Number of interruptions. 3 times;
● Interruption interval. 100 ms.
b) Voltage interruption, voltage dip amplitude ΔU = 100 %
● Interruption time. 0.3 s;
● Number of interruptions. 3 times;
● Interruption interval. 10 s.
c) Voltage dip, voltage dip amplitude ΔU = 60 %
● Dip time. 1 s;
● Number of dips. 3 times;
● Interruption interval. 10 s.
5.7 Function check
5.7.1 Metering function check
APPLY a rated voltage to the electric energy meter on the calibration device,
and APPLY a rated forward current; the metering error of the electric energy
meter shall be normal, and the forward electric energy shall be correctly
accumulated; the measured value of voltage, current and power of the electric
energy meter read through display or communication is compared with the
standard value of the output of the device, the measurement error shall meet
the requirements of 4.8.2. The output current of the device is switched to
d) Test voltage. 4 kV;
e) Test time. 60 s per polarity.
5.8.4 Surge immunity test
The test shall be carried out in accordance with GB/T 17626.5 and under the
following conditions.
a) It is tested as a benchtop device;
b) The meter is in working state. The voltage line is applied with the reference
voltage, if the auxiliary power supply is provided, the rated voltage of the
power circuit is added, and the current line is open (the current line of
indirect connected DC electric energy meter is short-circuited);
c) The test voltage is applied to the voltage line and the current line in
differential mode;
d) Line-line test voltage. 1 kV, line-ground test voltage. 2 kV;
e) Number of tests. 5 for positive polarity, 5 for negative polarity;
f) Repeat rate. maximum 1/min.
5.8.5 Electromagnetic disturbance test
The test shall be carried out in accordance with the specifications of GB/T
18655. The test results shall meet the requirements specified in 4.9.
5.9 Salt spray resistance test
The test shall be carried out in accordance with the specifications of QC/T 413-
2015. The electrical performance of the electric energy meter after the test shall
meet the requirements specified in 4.7.
5.10 Industrial solvent resistance test
The test shall be carried out in accordance with the specifications of QC/T 413-
2015. The electrical performance of the electric energy meter after the test shall
meet the requirements specified in 4.7.
5.11 Communication protocol consistency
CHECK the communication frame format, delay time, data identification and
verification method of the electric energy meter according to the specifications
of DL/T 645.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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