JJG 1149-2022Off-board Chargers for Electric Vehicles(for Trial Implementation) (English PDF)
Also coversJJG1149-2022
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Issued by
State Administration for Market Regulation Administrative organization
Level / Type
National · Mandatory
Issue date
June 28, 2022
Implementation date
December 28, 2022
Scope
JJG 1149-2022 (Off-board Chargers for Electric Vehicles(for Trial Implementation)) is available as an English-translated PDF.
JJG 1149-2022 is the Chinese standard "Off-board Chargers for Electric Vehicles(for Trial Implementation)". Its scope clause reads: 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. Its clauses include terms; overview; metrology performance requirements; general technical requirements; measuring instrument control.
It was issued by the State Administration for Market Regulation Administrative organization on 2022-06-28 and took effect on 2022-12-28.
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Document preview — JJG 1149-2022
National Standard of the People's Republic of China
Issued by: State Administration for Market Regulation Administrative organization
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
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.
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.
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.
5 Metrology performance requirements
5.1 Operate error
The operate error of the charger is expressed by relative error. Under the verification conditions specified in 7.2.1, the operate error of the charger shall meet the requirements in Table 1.See Table 2 for the value of the average temperature coefficient of the electric energy measurement of the charger.
5.2 Clock time error
For the charger with time-sharing charging function, the error of the clock time of the charger shall not exceed 5s at the first verification. In the follow-up verification, it shall not exceed 3min.
6 General technical requirements
6.1 Identification
The nameplate shall have the following identificati6.2 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.
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.
7.2 Verification conditions
7.2.1 Ambient conditions for verification
When verifying the charger, the following conditions shall be met.
7.4 Processing of verification results
7.4.1 Processing of verification results
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.
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.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 18 pages — is available in the English PDF.
Referenced standards
Normative references
JJG 842-2017 · JJF 1139
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Related Standards
NB/T 33001-2018 — Specification for electric vehicle off-board conductive charger
JJG 1192-2023 — Calibrator of Off-board Chargers for Electric Vehicles
JJG 1193-2023 — Calibrator of AC Charging Piles for Electric Vehicles
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JJG 1149-2022
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