GB/T 26991-2023
Test methods for power performance of fuel cell electric vehicles (English Version)

Standard No.

GB/T 26991-2023

Language

Chinese, Available in English version

Release Date

2023

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 26991-2023

Replace

GB/T 26991-2011

Introduction

1. Background and purpose of the standard

GB/T 26991-2023 "Test Method for Power Performance of Fuel Cell Electric Vehicles" is the first systematic specification of the power performance of fuel cell electric vehicles in my country, replacing the original GB/T26991-2011 standard. The new standard adds definitions of terms such as hybrid mode and REESS mode, and expands the test content, including the determination methods of key indicators such as maximum vehicle speed, acceleration ability, and climbing ability.

2. Comparison of standard frameworks

Standard version	Scope of application	New content	Main changes
GB/T 26991—2011	M and N fuel cell electric vehicles	No hybrid mode involved	Only covers maximum speed test
GB/T 26991—2023	M and N fuel cell electric vehicles, extended to other types	Added hybrid mode and REESS mode definitions	Add test items such as acceleration ability and climbing ability

3. Interpretation of the main contents of the standard

3.1 Test conditions

The standard puts forward strict requirements on the test environment, including:

• Atmospheric temperature range: 0°C to 40°C
• Atmospheric pressure range: 91kPa to 104kPa
• Air density change does not exceed 7.5% of the standard value
• Wind speed limit: average wind speed does not exceed 3m/s, gusts do not exceed 5m/s
• Relative humidity requirement: less than 95%, avoid testing in rainy and foggy days

3.2 Test equipment specifications

Table 1 lists the measurement parameters, units and accuracy requirements in detail to ensure the reliability of the test data:

Measurement parameters	Unit	Accuracy	Resolution
Time	s	±0.1	0.1
Length	m	±0.1%	1

3.3 Test method

The standard specifies a variety of test items, including:

• Maximum speed test: Calculate the maximum speed of the vehicle at stable driving through testing in both directions or in a single direction.
• 30min maximum speed test: Verify the stability of the vehicle under continuous acceleration.
• Acceleration capability test: Divided into two modes: starting from the spot and overtaking, to test the acceleration performance of the vehicle.

4. Implementation Suggestions

4.1 Preparation before testing

Ensure that the test vehicle meets the following conditions:

• Hydrogen filling complies with the requirements of GB/T 37244
• REESS power is adjusted to a reasonable range (30%~70%)
• The load is evenly distributed and firmly fixed

4.2 Data Collection and Analysis

Use professional test equipment to record key parameters, including:

• Vehicle speed
• Acceleration
• Time
• Load distribution

GB/T 26991-2023 Referenced Document

• GB 18384 Electric vehicles safety requirements
• GB/T 12428 Calculation method of passenger car loading mass
• GB/T 12534 Motor vehicles--General rules of road test method
• GB/T 12539 Motor vehicles steep hill climbing test method
• GB/T 12545.1-2008 Measurement methods of fuel consumption for automobiles- Part 1:Measurement methods of fuel consumption for passenger cars
• GB/T 15089 Classification of power-driven vehicles and trailers
• GB/T 18385 Test methods for power performance of pure electric vehicles*， 2024-08-23 Update
• GB/T 19596 Terminology of electric vehicles
• GB/T 19752 Test methods for power performance of hybrid electric vehicles*， 2024-08-23 Update
• GB/T 24548 Fuel cell electric vehicles.Terminology
• GB/T 37244 Fuel specification for proton exchange membrane fuel cell vehicles—Hydrogen
• GB/T 3730.2 Road vehicle--Masses--Vocabulary and codes

GB/T 26991-2023 history

• 2023 GB/T 26991-2023 Test methods for power performance of fuel cell electric vehicles
• 2011 GB/T 26991-2011 Fuel cell electric vehicles.Maximum speed test method

Standard and Specification