GB/Z 173-2026Fuel cell electric motorcycles and mopeds - Code of practice for test of energy consumption and range (English PDF)

4.1 Test Vehicle Conditions

4.1.1 The test vehicle should preferably be equipped with a remaining battery power indicator and a remaining battery power warning device, and meet the requirements of GB 24155 for the vehicle. Development and design are essential.

4.1.2 Test vehicles should be equipped with a residual hydrogen warning device. When the hydrogen input pressure is lower than the minimum pressure set by the manufacturer, it should be indicated by a... A clear sound or light signal device is used to provide a prompt.

4.1.3 The power batteries configured in the test vehicles should be produced within the last year and the number of charge-discharge cycles should preferably not exceed 50.

4.1.4 The fuel cell system and on-board hydrogen storage system configured in the test vehicle should be within one year of production, and the number of hydrogen charging and discharging cycles should preferably not exceed 50.

4.1.5 Before testing, the test vehicle should be broken in for 300km using the matching fuel cell system and power battery, or as recommended by the manufacturer. The break-in process continues until the vehicle reaches a stable state. The break-in should be performed according to the specifications outlined in the instruction manual; if no specifications are provided, refer to the method described in section 5.3.1. conduct.

4.1.6 Test vehicles should be maintained and serviced in accordance with the user manual and relevant technical documents to ensure they are in normal technical condition.

4.1.7 The test vehicle should be loaded with a load mass of (75±5) kg. If the test is conducted on a chassis dynamometer, it should be performed according to... Test vehicle mass loading as specified in GB 18176 or GB 14622.

4.1.8 Tire pressure should conform to the specifications in the product instruction manual.

4.1.9 Except for necessary equipment and routine operating parts of the vehicle, the lighting, signaling devices and auxiliary devices of the test vehicle should be turned off.

4.2 Test Road Conditions

4.2.1 The test road should preferably be asphalt or concrete, and the surface should be flat, dry, and clean. If it is a ring road, the turning radius should be not small. At 50m.

4.2.2 The test section should be kept level, with a longitudinal slope not exceeding 1%, and the height difference between any two points along the entire length should not exceed 1m. The slope should not exceed 3%.

4.3 Test Environment Conditions The testing environment shall meet the following requirements.

a) During indoor testing, the temperature should be within (25±5)°C;

b) During outdoor testing, the temperature should be below (25±10)°C;

c) During outdoor testing, the average wind speed should not exceed 3 m/s, and the maximum gust speed should not exceed 5 m/s;

d) Outdoor tests should not be conducted on rainy or foggy days, and the relative humidity should not exceed 95%.

4.4 Test Instrument Conditions The resolution and accuracy of the testing instruments are shown in Table 1.

4.5 Driving conditions Drivers should drive the vehicle in accordance with the relevant requirements of GB/T 5378, and the riding posture should remain as unchanged as possible during the test.

5.3 Discharging and charging of power batteries

5.3.1 Before the initial charge, the power battery of the test vehicle should be fully discharged. Discharging can be done using a dynamometer on the road or on the chassis. Above, with the on-board hydrogen storage system turned off and disconnected, drive steadily at a speed of (70±5)% of the maximum design speed until the following situation occurs. Situation 1.

a) The battery reaches its cutoff voltage or the management system cuts off power;

b) The vehicle speed does not reach 65% of the maximum design speed.

5.3.2 The power battery should be fully charged according to the charging procedure provided by the manufacturer. If the manufacturer has not specified a charging procedure, then follow the instructions provided. The test should be conducted in accordance with the provisions of section

5.1 of GB/T 18385-2024.The test should preferably begin within 4 hours after the charging is completed.

5.4 Hydrogen refueling, replenishment, and pressure measurement of on-board hydrogen storage systems

5.4.1 The on-board hydrogen storage system should be hydrogenated before testing in accordance with the provisions of A.1.1 and A.2.1.

5.4.2 The on-board hydrogen storage system should be tested in accordance with the provisions of A.1.2 and A.2.2 before adding hydrogen, and the mass of hydrogen consumed in the test should be calculated.

5.5 Setting of Road Test Loads and Chassis Dynamometer It is advisable to follow the provisions of section

5.4 of GB/T 24157-2017.

5.6 Test speed and time tolerances The requirements of section

5.5 of GB/T 24157-2017 should be adopted.

5.7 Test Procedure

5.7.1 Driving range and energy consumption rate were measured using the driving cycle test method.

5.7.1.1 The driving range test under the operating condition method shall be conducted only on the chassis dynamometer. The chassis dynamometer shall be set according to Appendix GB/T 24157-2017. Recording C is required. Electric mopeds should be equipped with road resistance settings according to GB 18176, and electric motorcycles should be equipped with road resistance settings according to GB 14622. Road resistance.

5.7.1.2 Conduct the test according to the operating cycle in Appendix C of GB/T 24157-2017, and continue driving until the situation described in

5.2 occurs, then end the test.

5.7.1.3 The test process should be continuous. Unless otherwise specified, the power outage during the operating condition test should not exceed 3 times (referring to outside the operating cycle). Parking time (total time not exceeding 15 minutes).

5.7.1.4 After the test, record the driving range under the operating conditions (in kilometers, rounded to one decimal place), and also record the time taken (in kilometers). (For points), and record the vehicle's maximum speed, average speed, number of stops, and stopping time during the test.

5.7.2 Constant speed method test to measure driving range and energy consumption rate

5.7.2.1 The constant-speed driving range test can be conducted on a road or on a chassis dynamometer. In case of discrepancies between the two test results, the road test shall prevail. Accurate. Road test conditions should conform to the requirements of GB/T 5378.The chassis dynamometer settings should be in accordance with Appendix GB/T 24157-2017. Recording C is required. Electric mopeds should be equipped with road resistance settings according to GB 18176, and electric motorcycles should be equipped with road resistance settings according to GB 14622. Road resistance.

5.7.2.2 Drive continuously at 70% of the maximum speed until the situation described in

5.2 occurs, then end the test. Here, maximum speed refers to the speed at the rated speed. The stable maximum speed at which a vehicle can continue to operate under power conditions, in order to avoid the speed at peak power.

5.7.2.3 The test process should be kept continuous. Unless otherwise specified, the power outage during the constant speed method test should not exceed 3 times, and the cumulative time should not exceed [a certain limit]. Wait 15 minutes.

5.7.2.4 After the test, record the mileage driven using the constant speed method (in kilometers, rounded to one decimal place), and also record the time taken (in kilometers). (for points), and record the vehicle's maximum speed, average speed, number of stops, and stopping time during the test.

5.7.3 Measurement of Energy Consumption by the Power Grid Within 2 hours of completing the driving range test according to 5.1b), 5.1d), 5.1g), or 5.1i), the power battery shall be charged according to

5.3.2 and connected to the grid. An energy measuring device is connected between the charging station and the vehicle charger to measure the energy E consumed by the power grid. After charging is complete, the amount of energy consumed by the power grid, E, is recorded. And charging time.

5.8 Calculation and Processing of Experimental Data The calculation and processing of experimental data shall be carried out in accordance with Appendix B.