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GB/T 37340-2019Conversion methods for energy consumption of electric vehicles (English PDF)

电动汽车能耗折算方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 25, 2019

Implementation date

October 1, 2019

Scope

GB/T 37340-2019 is the English-translated version of 电动汽车能耗折算方法.

GB/T 37340-2019 provides the methods for converting the electric energy consumption of an electric vehicle into an equivalent fuel consumption. Clause 1 states that it applies to pure electric vehicles and plug-in hybrid electric vehicles, and names no exclusions.

The document is built around three calculation clauses, clause 4 on the calculation and determination of the electric energy consumption of a vehicle type, clause 5 on the heat value conversion method and clause 6 on the CO2 emission conversion method, with an informative Appendix A giving numerical reference values for the formula calculation parameters together with a worked example, and a bibliography at the end.

Clause 5 offers two routes, a simple conversion method whose formula (1) gives the equivalent fuel consumption FC in litres per 100 kilometres from the electric energy consumption of the vehicle E in kilowatt-hours per 100 kilometres and the energy factor of fuel FE in litres per kilowatt-hour, and a fuel life cycle conversion method whose formula (2) gives an equivalent fuel consumption FCe; the standard fixes how far each quantity is rounded off, to two decimal places for FC and E and four for FE.

Clause 6 works the same way for carbon dioxide, calculating the CO2 conversion factor by formula (5) from the standard coal consumption of thermal power supply, the CO2 emission factor of fuel coal, the thermal power ratio, the CO2 emission factor of fuel, the reduced factor of fuel coal and standard coal, the charge efficiency and the line loss rate, again with a stated rounding for each.

Clause 4 states that the electric energy consumption of a pure electric vehicle shall be converted into an equivalent gasoline or diesel consumption and sends the reader to Appendix A for the parameters used in these calculations.

Clause 2 cites GB/T 18386, GB/T 19233, GB/T 19596, GB/T 19753 and GB/T 19754, and the electric energy consumption E is to be measured according to GB/T 18386, GB/T 19233, GB/T 19753 and GB/T 19754.

Clause 3 takes its terms from GB/T 19596 and adds the fuel energy factor, the fuel volume that generates the same heat value as the unit of electric quantity, in a definition the draft on this page cuts off in mid-sentence. It was issued on March 25, 2019 and has applied since October 1, 2019.

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Document preview — GB/T 37340-2019

National Standard of the People's Republic of China

ICS: 43.020
Classification: T 47

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword3
1 Scope4
2 Normative references4
3 Terms and definitions4
4 Calculation and determination of electric energy consumption of vehicle types5
5 Heat value conversion method6
6 CO2 emission conversion method7
Appendix A (Informative) Numerical reference value and example of formula calculation parameters9
Bibliography11

1 Scope

This Standard provides the methods for converting electric vehicles' electric energy consumption equivalent into fuel consumption.

This Standard applies to pure electric vehicles and plug-in hybrid electric vehicles.

2 Normative references

The following documents are indispensable for the application of this document.

For the dated references, only the editions with the dates indicated are applicable to this document. For the undated references, the latest edition (including all the amendments) are applicable to this document.

GB/T 18386 Electric vehicles - Energy consumption and range - Test procedures

GB/T 19233 Measurement methods of fuel consumption for light-duty vehicles

GB/T 19596 Terminology of electric vehicles

GB/T 19753 Test Methods for Energy Consumption of Light-duty Hybrid Electric Vehicles

GB/T 19754 Test methods for energy consumption of heavy-duty hybrid electric vehicles

3 Terms and definitions

The terms and definitions as defined in GB/T 19596 and the following apply to this document.

3.1 Fuel energy factor

The fuel volume which generates the same heat value (1 kW . h=3600 kJ) as the unit electric quantity, calculated by GB/T 2589, GB 17930, GB 19147, in

4 Calculation and determination of electric energy consumption of vehicle types

For a pure electric vehicle, its electric energy consumption shall be converted into equivalent gasoline/diesel consumption. See Appendix A for the parameters used in the above calculations.

5 Heat value conversion method

5.1 Simple conversion method

According to formula (1), the equivalent fuel consumption (FC) of electric energy is calculated:

Where:

FC - Equivalent fuel consumption, in liters per 100 kilometers (L/100 km). The calculation result is rounded off to two decimal places;

E - The electric energy consumption of vehicle, in kilowatt-hours per 100 kilometers (kW . h/100 km). It is measured according to GB/T 18386, GB/T 19233, GB/T 19753, GB/T 19754. Its value is rounded off to two decimal places;

FE - The energy factor of fuel, in liters per kilowatt-hour [L/(kW . h)]. The value is rounded off to four decimal places.

5.2 Fuel life cycle conversion method

5.2.1 Calculation of equivalent fuel consumption (FCe)

According to formula (2), the equivalent fuel consumption (FCe) is calculated:

Where:

FCe - Equivalent fuel consumption, in liters per 100 kilometers (L/100 km). The calculation result is rounded off to two decimal places;

FE - The energy factor of fuel, in liters per kilowatt-hour [L/(kW . h)]. The value

6 CO2 emission conversion method

FCO2 - CO2 conversion factor, in liters per kilowatt-hour [L/(kW . h)]. According to formula (5), it is calculated. The value is rounded off to two decimal places.

6.2 Calculation of CO2 conversion factor (FCO2)

According to formula (5), the CO2 conversion factor (FCO2) is calculated:

Where:

FCO2 - CO2 conversion factor, in liters per kilowatt-hour [L/(kW . h)]. The value is rounded off to two decimal places;

TE - Standard coal consumption of thermal power supply, in kilograms per kilowatt-hour [kg/(kW . h)]. The value is rounded off to three decimal places;

TC - CO2 emission factor of fuel coal. The value is rounded off to two decimal places;

phi - Thermal power ratio, %. The value is rounded off to one decimal place;

TF - CO2 emission factor of fuel. The value is rounded off to two decimal places;

tM - Reduced factor of fuel coal and standard coal. The value is rounded off to two decimal places;

ich - Charge efficiency, %. The value is rounded off to an integer bit;

itr - Line loss rate, %. The value is rounded off to two decimal places. […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 18386

Cited by

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