JJG 1149-2022_English: PDF (JJG1149-2022)
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Standard ID | JJG 1149-2022 (JJG1149-2022) | Description (Translated English) | Off-board Chargers for Electric Vehicles(for Trial Implementation) | Sector / Industry | Metrology & Measurement Industry Standard | Word Count Estimation | 20,270 | Date of Issue | 2022-06-28 | Date of Implementation | 2022-12-28 | Drafting Organization | China Institute of Metrology, Shenzhen Institute of Metrology and Quality Inspection | Administrative Organization | National Electromagnetic Metrology Technical Committee | Issuing agency(ies) | State Administration for Market Regulation | Standard ID | JJG 1149-2018 (JJG1149-2018) | Description (Translated English) | Off-board Charger for Electric Vehicles | Sector / Industry | Metrology & Measurement Industry Standard | Classification of Chinese Standard | A55 | Word Count Estimation | 22,280 | Date of Issue | 2018-02-27 | Date of Implementation | 2018-05-27 | Drafting Organization | China Institute of Metrology, Shenzhen Institute of Metrology and Quality Inspection | Administrative Organization | National Electromagnetic Measurement Technical Committee | Issuing agency(ies) | State Administration of Quality Supervision, Inspection and Quarantine |
JJF 1149-2022
JJF
NATIONAL METROLOGICAL VERIFICATION REGULATIONS
OF THE PEOPLE’S REPUBLIC OF CHINA
JJG 1149-2022
Off-board Chargers for Electric Vehicles (for Trial
Implementation)
ISSUED ON: JUNE 28, 2022
IMPLEMENTED ON: DECEMBER 28, 2022
Issued by: State Administration for Market Regulation
Table of Contents
Introduction ... 5
1 Scope ... 6
2 Normative references ... 6
3 Terms ... 6
4 Overview ... 7
5 Metrology performance requirements ... 8
5.1 Operate error ... 8
5.2 Clock time error ... 9
6 General technical requirements ... 9
6.1 Identification ... 9
6.2 Testing interface ... 10
6.3 Constant ... 10
6.4 Minimum power variable ... 10
6.5 Display of charging energy ... 10
7 Measuring instrument control ... 10
7.1 First verification, follow-up verification and in-use inspection ... 10
7.2 Verification conditions ... 10
7.3 Verification items and verification methods ... 11
7.4 Processing of verification results ... 16
7.5 Verification period ... 17
Annex A Format for original record of verification ... 18
Annex B Format for inner page of verification certificate/ verification result notification
(Page 2) ... 21
Annex C Format for inner page of verification certificate/ verification result notification
(Page 3) ... 22
Verification Regulation of Off-board Chargers for Electric
Vehicles (for Trial Implementation)
1 Scope
This Regulation applies to the first verification, follow-up verification and in-use
inspection for off-board chargers for electric vehicles.
The verification of off-board chargers for electric vehicles based on statistical sampling
methods can be carried out in accordance with this Regulation.
2 Normative references
This Regulation refers to the following documents:
JJG 842-2017, Electronic Meters for Measuring Direct-current Electrical Energy
JJF 1139, Principle and method for determination verification period of measuring
instruments
NB/T 33001-2018, Specification for electric vehicle off-board conductive charger
For the dated documents, only the versions with the dates indicated are applicable to
this Regulation; for the undated documents, only the latest version (including all the
amendments) is applicable to this Regulation.
3 Terms
The following terms and definitions apply to this document.
3.1 off-board charger
A special device that is fixedly connected to an AC or DC power source, converts its
electrical energy into DC electrical energy, charges the power battery of an electric
vehicle by means of conduction, and has the functions of measuring, storing, and
providing results to users.
3.2 connection point
A connection point that the off-board charger is connected to the electric vehicle.
NOTE: If the output cable is a fixed part of the off-board charger, this point is defined as the
connector at the end of the cable. Otherwise, the connection point is defined as the cable insertion
point of the off-board charger.
3.3 real load test method
A method of verification using the actual operating load.
3.4 virtual load test method
A method that uses the virtual load provided by the charger verification device to verify.
3.5 constant-current charge
A way that the battery is charged with a controlled constant current when the charging
voltage is within the working range.
3.6 constant voltage charge
A way when the charging current is within the working range, the battery is charged
with a controlled constant voltage.
3.7 operate error
DC energy measurement errors of off-board chargers under working conditions.
3.8 test output
A device that provides pulses corresponding to the DC energy measured by off-board
chargers.
3.9 constant
A numerical value representing the relationship between the electric energy recorded
by the off-board charger and the corresponding test output value.
4 Overview
An off-board chargers for electric vehicles (hereinafter referred to as charger) is a
metrology device that provides DC power for electric vehicles. It is mainly composed
of rectification and chopper control unit, display interface or data transmission interface,
metrology module, connection device for conductive charging and other parts. The
schematic diagram of the charger is shown in Figure 1.
The charger converts AC power into DC power through the rectification and chopper
control unit. The DC power is sent to the electric vehicle through the connection device
for conductive charging to meet the charging demand. The metrology module
completes the measurement of DC electric energy, and outputs the measured quantity
to the display interface or data transmission interface.
not marked, the maximum current value is: rated power/[(Umax+Umin)/2]; the minimum current
value is: 5A.
2 For chargers installed before January 1, 2023, if the accuracy level is not marked, it will be
implemented as level 2.
6.2 Testing interface
The technical indicators of the test output and communication interface of the charger
used for verification shall meet the requirements of relevant standards.
6.3 Constant
The charger shall have a pulse output corresponding to the measured DC energy. It shall
be consistent with the constant marked on the nameplate.
6.4 Minimum power variable
The minimum electric energy variable shall be 0.001kW·h.
6.5 Display of charging energy
The charger shall be able to display the charging energy. The number of digits for
electric energy display shall be no less than 6 digits (including at least 3 decimal places).
For chargers with time-sharing charging function, the resolution of clock time display
is not greater than 1s.
7 Measuring instrument control
7.1 First verification, follow-up verification and in-use inspection
The first verification is for a charger that has not been verified. The follow-up
verification is any verification after the first verification. The repaired charger must be
according to the first verification. In-use inspection is an inspection to find out whether
the verification mark or verification certificate of the charger is valid, and whether the
verified charger has been significantly modified.
7.2 Verification conditions
7.2.1 Ambient conditions for verification
When verifying the charger, the following conditions shall be met:
- Verification conditions and their deviations do not exceed those specified in Table
3.
- There shall be no appreciable shock load. The seal of the charger is complete.
b) Verification operate error
Compare the DC power value measured simultaneously by the verification device
and the charger under test, so as to determine the operate error of the charger
under test.
According to the principle, it can be divided into real load test method and virtual
load test method.
1) Real load test method
Connect the charger calibrator and load composition verification device to the
connection point. Use method I or method II at the selected load point.
Compare the DC power values measured simultaneously by the verification
device and the charger under test, so as to determine the operate error of the
charger under test.
Method I:
When both the charging pile calibrator and the inspected charger are working
continuously, the pulse output by the inspected charger is used to control the
counting of the charging pile calibrator to determine the operate error of the
inspected charger. When using this method, use method Ⅱ to check whether
the charger constant is correct.
The operate error γ of the tested charger is calculated according to (1).
Where,
m - the measured pulse number;
m0 - the calculated and determined pulse number, calculated according to
formula (2).
Where,
N - the number of pulses of the tested charger;
C0 - the constant of calibrator, imp/ (kW·h);
CL - the constant of the charger under test, imp/ (kW·h).
NOTE: Select the appropriate pulse number N of the tested charger, so that the
quantization error of the calculated pulse number is not greater than 1/10 of the grade
index of the tested charger.
Method II:
When both the charging pile calibrator and the inspected charger are working
continuously, the operate error of the tested charger is determined by using the
output electric energy indication value of the inspected charger and the electric
energy value measured by the charging pile calibrator.
The operate error γ of the charger under test is calculated according to (3):
Where,
E' - the difference between the indicated value of the output electric energy
when the tested charger stops charging and starts charging, kW·h;
E - the electric energy value measured by the standard meter, kW·h;
γ0 - the established systematic error of the verification device, when no
correction is required, γ0=0.
The charging pile calibrator shall run synchronously with the tested charger.
The ratio (%) of the electric energy value represented by the last word (or the
minimum scale value) of the display of the tested charger to the accumulated
E' shall not be greater than 1/5 of the grade index of the tested charger.
During the verification process, record the error measurement data at least
twice. Take the average value to calculate the operate error.
2) Virtual load test method
Use the verification device. Compare the DC power values measured
simultaneously by the verification device and the tested charger, so as to
determine the operate error of the tested charger. When using the virtual load
test method, the influence of the connection position on the test results shall
be considered.
The standard table method is used to verify the charger according to the
provisions of 1).
Use watt-second method to verify the charger. Use a verifier to measure the
set constant power, or use a standard power source to determine the power.
The quantization error of the number of digits displayed by the verifier or
Where,
T - the reference clock display time, ××h××min××s;
T0 - the display time of the charging pile under inspection, ××h××min××s.
The test results shall meet the requirements of 5.2.
7.4 Processing of verification results
7.4.1 Processing of verification results
7.4.1.1 Judging all data shall be subject to the rounded data.
7.4.1.2 The rounding interval of operate error is 1/10 of the accuracy level of the charger.
7.4.1.3 The rounding interval of the clock time error is 1s.
7.4.2 Rounding off method for measurement data
7.4.2.1 Rounding off method when the rounding off interval is 1: The right side of the
reserved digit is for the reserved digit 1. If it is greater than 0.5, add 1 to the reserved
digit. If it is less than 0.5, the reserved digit remains unchanged. If it is equal to 0.5, the
reserved digit remains unchanged when it is an even number. Add 1 when the reserved
digit is odd.
NOTE: "Reserved digit" refers to the number corresponding to the rounding interval. This value is
called a "reserved digit".
7.4.2.2 Rounding method when the rounding interval is n (n≠1): Divide the measured
data by n. Then round off according to the method of 7.4.2.1. After rounding, multiply
by n, which is the final rounding result.
7.4.3 If all items meet the requirements, it is judged as qualified, otherwise it is judged
as unqualified. Chargers that pass the verification will be issued with a verification
certificate (see Annexes B and C for the format of the verification certificate) and a
verification-pass mark.
7.4.4 A verification-pass charger must be sealed at the position of the electric energy
meter or metrology module used inside it. Splitters that are used separately also need to
be sealed.
NOTE: For chargers installed before January 1, 2023, the implementation of shunt seal
requirements will be suspended until December 31, 2027, under special circumstances.
7.4.5 A test result notification will be issued to the unqualified charger (see Annexes B
and C for the format). Cancel the original verification-pass seal or verification-pass
mark.
......
JJG 1149-2018
JJG
NATIONAL METROLOGICAL VERIFICATION REGULATION
OF THE PEOPLE’S REPUBLIC OF CHINA
Off-board Charger for Electric Vehicles
ISSUED ON. FEBRUARY 27, 2018
IMPLEMENTED ON. MAY 27, 2018
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the PRC
Table of Contents
Introduction ... 6
1 Scope ... 7
2 References ... 7
3 Terms ... 7
3.1 Off-board charger ... 7
3.2 Constant current charging ... 7
3.3 Constant voltage charging ... 8
3.4 Minimum pay variable ... 8
3.5 Operating error ... 8
3.6 Test output ... 8
3.7 Constant ... 8
4 Overview ... 8
5 Metrology performance requirements ... 9
5.1 Operating error ... 9
5.2 Indication error ... 10
5.3 Pay amount error ... 11
5.4 Clock indication error... 11
6 General technical requirements ... 11
6.1 Symbol ... 11
6.2 Detection interface ... 11
6.3 Constant ... 11
6.4 Minimum electrical energy variable ... 12
6.5 Display of charger ... 12
6.6 Insulation resistance ... 12
7 Metrology instrument control ... 12
7.1 First verification, follow-up verification ... 12
7.2 Verification conditions ... 12
8 Verification items ... 13
9 Verification methods ... 14
9.1 Appearance examination ... 14
9.2 Insulation resistance test ... 14
9.3 Determination of operating error ... 14
9.4 Determination of indication error ... 17
9.5 Determination of charging pay amount error ... 18
9.6 Determination of clock indication error ... 18
10 Verification result processing and verification period ... 19
10.1 Verification result processing ... 19
10.2 Verification period ... 20
Appendix A Format of verification original record of charger ... 21
Appendix B Format of inside page of verification certificate/verification result
notice (Page 2) ... 23
Appendix C Format of verification result page of verification
certificate/verification result notice (Page 3) ... 24
Verification Regulation of Off-board Charger for
Electric Vehicles
1 Scope
This Regulation is applicable to the first verification, follow-up verification, and
in-service examination of off-board charger for electric vehicles (hereafter
known as charger for short).
2 References
This Regulation refers to the following documents.
JJG 842-2017 Electronic Meters for Measuring Direct-current Electrical
Energy
NB/T 33001-2010 Specification for Electric Vehicle Off-board Conductive
Charger
For the dated references, only the versions with the dates indicated are
applicable to this Regulation. For the undated references, the latest version
(including all the amendments) are applicable to this Regulation.
3 Terms
The following terms and definitions are applicable to this document.
3.1 Off-board charger
A special device which is fixedly installed on the ground and converts the AC
electrical energy of the power grid into DC electrical energy to charge the power
storage battery of the electric vehicle in a conductive manner.
3.2 Constant current charging
The manner in which the storage battery is charged at a controlled constant
current with charging voltage in its operating range.
5.3 Pay amount error
The absolute value of the difference between the pay amount shown by the
charger and the amount payable, calculated according to the unit price and the
indication value of charging electrical energy of charger, shall not exceed the
minimum pay variable.
5.4 Clock indication error
The time of charger shall be accurate. For the charger with time-sharing
charging function, at the first verification, the clock indication error of the charger
shall not exceed 5 s. At the follow-up verification, it shall not exceed 3 min.
6 General technical requirements
6.1 Symbol
There shall be the following symbols on the nameplate.
- Name and model;
- Name of manufacturer;
- Standard on which the product is based;
- Number and year of manufacture;
- Maximum voltage, minimum voltage, minimum current, and maximum
current;
- Constant;
- Accuracy class;
- Unit of metrology (The unit of metrology can be displayed in the display).
6.2 Detection interface
The technical specifications of the charger’s test output interface for verification
and communication interface shall conform to the requirements of relevant
standards.
6.3 Constant
The charger shall have a pulse output for measuring error, which shall be
consistent with the constant marked by the nameplate.
Where.
E′ - The difference between the electrical energy indication at charging cut-off
and at the start of charging of the tested charger, kWh;
E - The electrical energy value measured by the standard electrical energy
meter, kWh;
γ0 - Defined system error of verification equipment, when correction is not
needed, γ [should be. γ0]=0.
The standard meter shall operate synchronously with the tested charger. The
ratio (%) of the electrical energy value represented by the last word (or the
minimum graduation) of display of the tested charger TO the accumulated E'
shall not be greater than 1/10 of the class index of the tested charger.
Under each load power, it shall record the error determination data at least twice
and take the average. If the average is at 0.8~1.2 times of the operating error
limit of the tested charger, it shall carry out the determination twice again; and
take the average of the determination data to calculate the operating error of
the tested charger.
9.4 Determination of indication error
The current circuits of the tested charger and the verification equipment are
connected in series; the voltage circuits are connected in parallel; and the
maximum load is applied for a period of time. After stopping the operation, the
indication error γ (%) of the tested charger is calculated according to the
equation (4).
Where.
E′ - The difference between the electrical energy indication at charging cut-off
and at the start of charging of the tested charger, kWh;
E - The electrical energy value measured by the standard electrical energy
meter, kWh;
γ0 - Defined system error of verification equipment, when correction is not
needed, γ0=0.
When verifying, the verification equipment shall operate synchronously with the
tested charger. The ratio (%) of the electrical energy value represented by the
Where.
T′ - Displayed time of tested charger, s;
T - Displayed time of standard clock tester, s.
The test results shall conform to the requirements of 5.4.
10 Verification result processing and verification
period
10.1 Verification result processing
10.1.1 The judgment of all data is based on the rounding data.
10.1.2 The operating error and the indication error have a rounding interval of
1/10 of accuracy class of charger.
10.1.3 The minimum pay variable and the amount payable have a rounding
interval of 0.01 yuan. The pay amount error has a rounding interval of 0.01 yuan.
The rounding interval of the clock indication error is 1 s. If the minimum pay
variable is less than 0.01 yuan, then the minimum pay variable is 0.01 yuan.
10.1.4 Rounding method for measured data
10.1.4.1 The rounding method when the number of rounding interval is 1. For
the digit 1 of reserved bit, if the right side of the reserved bit is greater than 0.5,
then the reserved bit is added by 1. If it is less than 0.5, then the reserved bit
remains unchanged. If equal to 0.5, the reserved bit remains unchanged when
it is even; the reserved bit is added by 1 when it is odd.
Note. “Reserved bit” refers to the digit of the bit corresponding to the rounding interval,
which is called “reserved bit”.
10.1.4.2 The rounding method when the number of rounding interval is n (n≠1).
DIVIDE the measured data by n; and ROUND the result according to the
rounding method of 10.1.4.1; after rounding off, MULTIPLY by n for the final
rounding result.
10.1.5 If all items conform to the requirements, it is judged as qualified,
otherwise it is judged as unqualified. Certified chargers shall be issued with
verification certificates, and the certification marks shall be affixed to the
Appendix A
Format of verification original record of charger
Verification original record of off-board charger for electric vehicles
Verification certificate/verification result notice No.. Date of verification.
Entrusting organization. Address of the organization.
Instrument name. Model. Exit-factory No..
Manufacturing company. Accuracy class. Connection mode.
Voltage. Current. Constant.
Technical
base. Temperature. °C
Relative
humidity. % Supply voltage. V Frequency. Hz
Verification place.
Names of
standards Model
Equipment
No.
Verification/calibration
certificate No.
Expiration
date
Accuracy
class
Verification items Verification results
1. Appearance examination □Qualified/□Unqualified
2. Insulation resistance Test voltage V, insulation resistance value MΩ □Qualified/□Unqualified
3. Operating error □Qualified/□Unqualified
Voltage Current Operating error/% Temperature corrected value. e= Error 1 Error 2 Average Result
4. Indication error
□Qualified/□Unqualified
......
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