GB/T 29318-2024 (GB/T29318-2024, GBT 29318-2024, GBT29318-2024) & related versions
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GB/T 29318-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.200
CCS K 81
Replacing GB/T 29318-2012
Electric Energy Metering for Off-board Charger of Electric
Vehicle
ISSUED ON: SEPTEMBER 29, 2024
IMPLEMENTED ON: APRIL 1, 2025
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms, Definitions and Symbols ... 5
4 Technical Requirements ... 7
4.1 Metering Interface ... 7
4.2 Functions ... 7
4.3 Requirements for Complete Machine ... 11
4.4 Requirements for metering module ... 13
5 Test Methods ... 13
5.1 Reference Conditions of Test ... 13
5.2 Metering Interface and Nameplate Inspection ... 14
5.3 Function Inspection ... 14
5.4 Accuracy Test ... 14
5.5 Pulse Constant Test ... 18
5.6 Error Variation Test ... 18
5.7 Clock Time Error Test ... 18
5.8 Climate and Environmental Impact Test ... 19
6 Inspection Rules ... 19
6.1 Inspection Classification ... 19
6.2 Inspection Items ... 19
6.3 Qualification Determination ... 20
Appendix A (informative) Schematic Diagram of Calibration Method ... 21
A.1 Real Load Calibration Method ... 21
A.2 Virtual Load Calibration Method ... 21
Appendix B (normative) Inspection Items ... 23
Electric Energy Metering for Off-board Charger of Electric
Vehicle
1 Scope
This document stipulates the technical requirements, test methods and inspection rules for the
DC electric energy metering part between the off-board charger of electric vehicles and electric
vehicles.
This document is applicable to the design, manufacturing, acceptance and use of the complete-
machine electric energy metering part of public off-board charger (hereinafter referred to as the
“charger”). Other types of chargers may take this document as a reference.
2 Normative References
The content of the following documents constitutes indispensable clauses of this document
through normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 2423.1 Environmental Testing for Electric and Electronic Products - Part 2: Test Methods
- Tests A: Cold
GB/T 2423.2 Environmental Testing for Electric and Electronic Products - 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 (12 h + 12 h cycle)
GB/T 18487.1-2023 Electric Vehicle Conductive Charging System - Part 1: 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 29317 Terminology of Electric Vehicle Charging / Battery Swap Infrastructure
3 Terms, Definitions and Symbols
The terms and definitions defined in GB/T 29317, and the following are applicable to this
document.
3.1 public off-board charger
within 24 hours, and the minimum interval between the time periods is 15 minutes.
b) Rates that match the time periods can be set.
4.2.4 Time adjustment function
The charger shall have a time adjustment function. In addition, it is prohibited to adjust the time
during the charging process.
4.2.5 Information recording function
4.2.5.1 Metering and billing information
The charger has the following functions:
a) It should be able to record the total charging energy and total billable amount;
b) It shall be able to record the charging records. A charging record at least includes:
charging order information, charging energy, billable amount, each rated used in
charging, start and end time of charging, charging energy of each rate, billable amount
of each rate, and other additional amounts;
c) At least the latest 1,000 times of the metering and billing information shall be saved.
4.2.5.2 Event records
The charger shall have the following functions:
a) Record the total number of programming times of the metering module and the time
and programming items of the last 10 programming times;
b) Record the total number of clears, the time of the last 10 clears, and the data before
clearing;
c) Record the total number of time adjustments and the time before and after the last 10
time adjustments;
d) Record the total number of times that the metering module shell is opened, and the
occurrence and termination times of the last 10 openings of the metering module shell.
4.2.6 Clear function
The charger has the following functions:
a) Metering and billing information and event records other than 4.2.5.2 b) can be
cleared through programming in the debugging state;
b) Prohibited setting of metering and billing information and events.
c) Clear events shall be permanently recorded.
4.2.7 Display function
4.2.7.1 Basic requirements
The charger shall have a display function that allows display on the machine body or other
carriers.
4.2.7.2 Display digits and resolution
The display digits and resolution of the charger satisfy the following requirements:
a) The display unit of the electric energy shall be kW h, with no less than 6 display
digits, at least 3 decimal places, and a resolution of no more than 0.001 kW h;
b) The display unit of the billable amount shall be yuan, with no less than 6 display digits,
at least 2 decimal places, and a resolution of no more than 0.01 yuan;
c) The display resolution of the current clock time shall not be greater than 1 s.
4.2.7.3 Charging display
4.2.7.3.1 Charging start display
The charging start display of the charger satisfies the following requirements.
a) The last charging termination display shall be automatically cleared before the current
charging operation.
b) If there are multiple billing modes to choose from, before starting charging, there shall
be a clear interface for users to choose from. If there is only one billing mode, there
shall be a clear interface to inform users of the billing mode, rate and rate period.
4.2.7.3.2 Charging process display
The charging process display of the charger satisfies the following requirements:
a) During the charging process, the current billing mode, real-time charging energy, real-
time billable amount and current time shall be able to be displayed;
b) The current rate, charging energy of the current rate, billable amount of the current
rate and current rate period should be displayed;
c) If the machine displays, the refresh time interval of the displayed data shall not be
greater than 1 s.
4.2.7.3.3 Charging termination display
shall be stored; after the above-mentioned functions are restored, metering and billing shall be
re-started.
4.3 Requirements for Complete Machine
4.3.1 Connection point location
The connection point location of the charger satisfies the following requirements:
a) When the connection point of the charger is at the vehicle connection, the location of
connection shall comply with the requirements of 3.1.5.3 and 3.1.5.4 in GB/T
18487.1-2023;
b) When the connection point of the charger is at the charger connection, the location of
connection shall comply with the requirements of 3.1.5.5 in GB/T 18487.1-2023;
c) If the charger has multiple connection points, each connection point shall be
individually meter-able.
4.3.2 Nameplate
The charger shall have a nameplate, and the nameplate identification shall include the following
meter-related information. If there are multiple charging interface outputs, the maximum
current and minimum current of each channel shall be marked. If each channel is not separately
marked, it is the same by default.
a) Metering standard, on which, the product is based.
b) Maximum voltage, minimum voltage, minimum current and maximum current.
c) Electric energy constant of the charger;
d) Accuracy level.
4.3.3 Measurement range
The measurement range of the charger shall comply with the following requirements:
a) The voltage measurement range covers the charger output voltage range;
b) The current measurement range covers the minimum current and maximum current
marked on the nameplate.
4.3.4 Accuracy requirements
4.3.4.1 Basic error limit at reference voltage
When the charger applies the reference conditions other than current, its basic error in electric
energy metering shall not exceed the requirements of Table 1. For chargers with bidirectional
Tn---the selected measurement time, expressed in (s);
P---the set constant power value, expressed in (W).
Use the automatic method to control the standard timer, the charger under test
continuously operates, and the determination time is not less than 10 s. If the power
pulse sequence sent by the calibrator or standard power source is not uniform enough
or its response speed is relatively slow, the determination time needs to be
appropriately increased.
During the calibration process, record the error determination data at least twice, and
take the average value to calculate the basic error.
5.4.2 Basic error test under reference voltage
During the test, the charger applies the reference conditions specified in Table 4 other than
current. The current test points shall include the minimum current and maximum current
marked on the charger nameplate. Adopt the method specified in 5.4.1 to test the basic error of
the charger.
Check whether the test results comply with the provisions of 4.3.4.1.
5.4.3 Basic error test under reference current
During the test, the charger applies the reference conditions specified in Table 4 other than
voltage. The voltage test points shall include the minimum voltage and maximum voltage
marked on the charger nameplate. Adopt the method specified in 5.4.1 to test the basic error of
the charger.
Check whether the test results comply with the provisions of 4.3.4.2.
5.4.4 Self-heating effect test
During the test, set the charger to operate at the rated power and maximum output current, and
immediately carry out the test on the error of electric energy metering. Then, at an interval of
no more than 1 s, accurately draw the error change curve as a function of time. This test is
conducted for at least 0.5 h, and in any case, the percentage error of the accuracy within 20 min
does not change by more than 0.2% (Level-1 and Level-2). Calculate the change value before
and after the error stabilizes.
Check whether the test results comply with the provisions of 4.3.4.3.
5.4.5 Electromagnetic compatibility test
During the test, under the test reference conditions specified in Table 4, select (Umin + Umax)/2,
0.5Imax load point to test the basic error. Then, in accordance with the requirements of 7.2 in
GB/T 18487.2-2017, conduct tests on the external power frequency magnetic field, radio
frequency electromagnetic field radiation, conducted disturbance induced by radio frequency
5.8 Climate and Environmental Impact Test
During the test, under the test reference conditions specified in Table 4, the charger is
respectively subjected to high-temperature test, low-temperature test, alternating heat and
humidity test. The test methods are as follows.
a) High-temperature test: put the charger into the environmental test chamber and follow
the requirements of “Test Bb: high-temperature test for temperature gradient of non-
heat dissipation test samples” of GB/T 2423.2. The test temperature complies with
the upper limit of normal operating temperature specified in 15.1.1 of GB/T 18487.1-
2023. After the test temperature of the environmental test chamber stabilizes, the
charger is set to operate under the rated load state to measure the electric energy
metering error, which shall comply with the requirements of Table 1 and Table 2.
b) Low-temperature test: put the charger into the environmental test chamber and follow
the requirements of “Test Ab: low-temperature test for temperature gradient of non-
heat dissipation test samples” of GB/T 2423.1. The test temperature complies with
the lower limit of normal operating temperature specified in 15.1.1 of GB/T 18487.1-
2023. After the test temperature of the environmental test chamber stabilizes, the
charger is set to operate under the rated load state to measure the electric energy
metering error, which shall comply with the requirements of Table 1 and Table 2.
c) Alternating heat and humidity test: put the charger into the environmental test
chamber and follow the requirements of “Test Db: alternating heat and humidity (12
h + 12 h cycle)” of GB/T 2423.4. The test temperature is 40 C and the number of
cycles is 2 times. After the test is completed, under the reference conditions, measure
the electric energy metering error, which shall comply with the requirements of Table
1 and Table 2.
6 Inspection Rules
6.1 Inspection Classification
The product inspection categories include exit-factory inspection, type inspection and
acceptance inspection.
6.2 Inspection Items
6.2.1 Exit-factory inspection
The manufacturer shall test the newly produced chargers in accordance with the inspection
items specified in Table B.1 of Appendix B. After the chargers pass the inspection, the
manufacturer shall issue an inspection certificate.
6.2.2 Type inspection
......
GB/T 29318-2012
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.99
T 35
GB/T 29318–2012
Electric energy metering for
electric vehicle off-board charger
ISSUED ON. DECEMBER 31, 2012
IMPLEMENTED ON. JUNE 01, 2013
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 ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Configuration requirements and installation location ... 6
5 Technical requirements ... 7
6 Test methods ... 12
7 Inspection rules ... 18
Foreword
This Standard is drafted according to the rules stated in GB/T 1.1-2009.
This Standard is the basic standard for electric vehicle charging metering, and shall be
used in combination with corresponding standards selected in accordance with
characteristics of electric energy metering device used for charging facilities.
This Standard was proposed by and shall be under the jurisdiction of China Electricity
Council.
Drafting organizations of this Standard. State Grid Corporation of China, China Electric
Power Research Institute, China Institute of Metrology, State Grid Electric Power
Research Institute, , Yunnan Electric Power Research Institute, XJ Group Corporation,
North China Grid Company Limited AND Liaoning Electric Power Supply Co., Ltd.
Main drafters of this Standard. Su Shengxin, Du Shuwei, Jia Junguo, Peng Chuning,
Zhang Xin, Zeng Haiou, Jiang Honglang, Gao Bo, Chen Cheng, Liu Wensong, Wang Lei,
He Qing, Zhang Xiuzeng, Cao Min, Wang Xin, Huo Junchao, Dong Xinsheng, Wang
Sitong, Zhou Lixia, Ma Xiaoqi and Hao Xin.
Electric energy metering for
electric vehicle off-board charger
1 Scope
This Standard specifies the configuration installation requirements, technical requirements,
test methods and inspection rules of the DC electric energy metering device for the
electric vehicle off-board charger (hereafter referred to as the charger), as well as the
charger metering technical requirements.
This Standard applies to the electric energy metering of charger.
2 Normative references
The articles contained in the following documents have become part of this Standard
when they are quoted herein. For the dated documents so quoted, only the dated versions
apply to this document. For the undated documents, all the modifications (including all
corrections) or revisions made thereafter shall be applicable to this Standard.
GB/T 2423.1-2008 Environmental testing - Part 2. Test methods - Tests A. Cold (IEC
60068-2-1.2007, IDT)
GB/T 2423.2-2008 Environmental testing - Part 2. Test methods - Tests B. Dry heat
(IEC 60068-2-2.2007, IDT)
GB/T 2423.4-2008 Environmental testing for electric and electronic products - Part 2.
Test method - Test Db. Damp heat, cyclic ( 12h+12h cycle) (IEC 60068-2-30.2005, IDT)
GB/T 2423.57-2008 Environmental testing for electric and electronic products - Part 2.
Tests - Test Ei. Shock - Shock response spectrum synthesis (IEC 60068-2-81.2003,
IDT)
GB/T 2423.58-2008 Environmental testing for electric and electronic products - Part 2.
Tests - Test Fi. Vibration - Mixed Mode (IEC 60068-2-80.2005, IDT)
GB/T 3928-2008 D.C. resistive volt ratio boxes (IEC 60524.1997, IDT)
GB 4208-2008 Degrees of protection provided by enclosure(IP code)
GB/T 5169.11-2006 Fire hazard testing for electric and electronic products - Part 11.
Glowing/hot-wire based test methods - Glow-wire flammability test method for
end-products (IEC 60695-2-11.2000, IDT)
GB/T 15284-2002 Particular requirements for multi-rate electricity meters
GB/T 17215.211 Electricity metering equipment (a.c.) - General requirements, tests
and test conditions - Part 11. Metering equipment (GB/T 17215.211-2006, IEC
62052-11.2003, IDT)
GB/T 17215.421-2008 Electricity metering equipment (a.c.) - Tariff and load control -
Part 21. Particular requirements for time switches (IEC 62054-21.2004, IDT)
GB/T 17626.2-2006 Electromagnetic compatibility (EMC) - Testing and measurement
techniques - Electrostatic discharge immunity test (IEC 61000-4-2.2001, IDT)
GB/T 17626.3-2006 Electromagnetic compatibility - Testing and measurement
techniques - Radiated radio-frequency electromagnetic field immunity test (IEC
61000-4-3.2002, IDT)
GB/T 17626.4-2008 Electromagnetic compatibility - Testing and measurement
techniques - Electrical fast transient/burst immunity test (IEC 61000-4-4.2004, IDT)
GB/T 17626.5-2008 Electromagnetic compatibility - Testing and measurement
techniques - Surge immunity test (IEC 61000-4-5.2005, IDT)
GB/T 29317 Terminology of electric vehicle charging/battery swap infrastructure
JJG 842-1993 Verification Regulation of D.C. Kilowatt-hour Meter
JB/T 9288-1999 External shunts
NB/T 33001 Specification for electric vehicle A.C. charging spot
3 Terms and definitions
Those defined in GB/T 29317 AND the following terms and definitions apply to this
Standard.
3.1
Direct connected meter
It refers to the electric energy meter of which the current circuit of connected instrument is
current signal, including the instrument with integrated design of electric energy meter and
shunt.
3.2
Shunts connected meter
It refers to the electric energy meter of which current circuit of connected instrument is
All circuit of electric energy meter to the ground shall be able to withstand AC voltage test
with 4kV power frequency for 1min. AC voltage test with 2kV power frequency for 1min
shall be able to be withstood among the disconnected circuit of electric energy meter.
There shall have no flashover, spark discharge or breakdown in the test.
5.1.5.3 Insulation resistance
Insulation resistance of all circuit of electric energy meter to ground shall not be less than
40MΩ.
5.1.6 Output interface
5.1.6.1 Electrical energy test pulse outputs
Electric energy meter shall have electric pulse and optical pulse test access port
proportional to its electrical energy. Electric pulse shall be output after optoelectronic
isolation; pulse width is. 80ms±20ms. Use super bright and long-life LED as power pulses
indication for optical pulse; mean time between failures (MTBF) of LED shall be greater
than or equal to 100, 000h under normal operating conditions. Outputs of electrical energy
test pulse shall be able to be hit from the right side
5.1.6.2 Clock signal outputs
Used to test the accuracy of electric energy meter timing; the output frequency is 1Hz.
5.1.7 Functional requirements
5.1.7.1 Electric energy metering
The electric energy meter can measure the total electrical energy and various rates
electrical energy.
5.1.7.2 Storage function
Storage function shall meet the following requirements.
a) The electric energy meter shall at least store the total power energy and all rates of
electricity data of the first two months or the first two settlement cycle; the default
value of data archived separation time shall be at 24.00 of the last day of each
month, or at any time of 1st -28th of each month.
b) After power supply of electric energy meter failure, the stored data shall be kept for
at least 1 year;
c) Electric energy and other key charging information shall be stored in built-in security
module of electric energy meter to prevent key data from being tampered.
5.1.7.3 Clock, time frame and rate
Clock, time frame and rate shall meet the following requirements.
a) The built-in hardware clock circuit with temperature compensation function has the
automatic switching function among calendar, timing and leap year. Under the
reference temperature, the clock accuracy is ≤ ± 0.5s/d. The variation of the
accuracy of the clock with temperature shall be less than 0.15s/°C per 24h. The
clock can be timed under the programming state, and perform broadcast timing
under the non-programming state; the clock error of the broadcast timing shall not
be more than 5min; and it can be timed only once a day.
b) Electric energy meter shall have at least two sets of rate time frame; the automatic
switching of the two sets of rate time frame can be achieved via pre-setting the time.
Each rate time frame can at least set 2 time zones in the whole year; it can at least
set 8 time frames within 24h; the minimum time interval of time frame is 15min; and
the time frame can be set crossing the zero point.
5.1.7.4 Measurement and monitoring
It can measure voltage, current, power, power factor and other operating parameters.
Measurement error (fiducial error) does not exceed ± 1%.
5.1.7.5 Communication function
Communication function shall meet the following requirements.
a) Electric energy meter shall have RS 485 communication interfaces to conduct
information exchange with billing equipment or system, and modulated infrared
interfaces to communicate with the hand-held meter reading unit;
b) Initial velocity of RS485 communication interface is 2400bps, can be set to 1200bps,
4800bps, 9600bps by software; communication rate of modulated infrared interface
is 1200bps.
5.1.7.6 Display function
Display function...
......
| Standard ID | GB/T 29318-2024 (GB/T29318-2024) | | Description (Translated English) | Electric energy metering for off-board charger of electric vehicle | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K81 | | Classification of International Standard | 29.200 | | Word Count Estimation | 22,229 | | Date of Issue | 2024-09-29 | | Date of Implementation | 2025-04-01 | | Older Standard (superseded by this standard) | GB/T 29318-2012 | | Drafting Organization | China Electricity Council, China Electric Power Research Institute Co., Ltd., China National Institute of Metrology, State Grid Smart Internet of Vehicles Technology Co., Ltd., China Southern Power Grid Research Institute Co., Ltd., State Grid Jibei Electric Power Co., Ltd. Metrology Center, Shenzhen Metrology Quality Inspection Institute, Teladian New Energy Co., Ltd., Zhejiang Provincial Institute of Metrology, China Southern Power Grid Electric Vehicle Service Co., Ltd., State Grid Henan Electric Power Company Marketing Service Center, State Grid Zhejiang Electric Power Co., Ltd. Marketing Service Center, Shanghai Electric Science Research Institute (Group) Co., Ltd., Hunan Provincial Institute of Metrology and Inspection, Xi'an Lingchong Chuangxiang New Energy Technology Co., Ltd., Changsha Tianheng Measurement and Control Technology Co., Ltd., Yantai Dongfang Weston Electric Co., Ltd., Beijing Wulitai Technology Co., Ltd., Qingdao Hi-Tech Communication | | Administrative Organization | China Electricity Council | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | | Standard ID | GB/T 29318-2012 (GB/T29318-2012) | | Description (Translated English) | Electric energy metering for electric vehicle off-board charger | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | T35 | | Classification of International Standard | 43.040.99 | | Word Count Estimation | 14,145 | | Quoted Standard | GB/T 2423.1-2008; GB/T 2423.2-2008; GB/T 2423.4-2008; GB/T 2423.57-2008; GB/T 2423.58-2008; GB/T 3928-2008; GB 4208-2008; GB/T 5169.11-2006; GB/T 15284-2002; GB/T 17215.211; GB/T 17215.421-2008; GB/T 17626.2-2006; GB/T 17626.3-2006; GB/T 17626.4-2008; GB/ | | Drafting Organization | State Grid Corporation | | Administrative Organization | China Electricity Council | | Regulation (derived from) | National Standards Bulletin No. 41 of 2012 | | Proposing organization | China Electricity Council | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the electric car -board charger (hereinafter referred to as the charger) DC energy metering device for metering the configuration of installation requirements, technical requirements, test methods and inspection rules on the charge |
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