QC/T 838-2010Ultracapacitor electric city buses (English PDF)

3.1 Supercapacitor electric city bus

An urban electric bus, that uses a supercapacitor as a power source or uses a supercapacitor as a main power source, AND does not need power from the overhead line network, when it is running away from the station.

3.2 Current collecting equipment

The device for supercapacitor electric city buses, to obtain electric energy from the power supply bank (see QC/T 839-2010 for definition).

3.3 Electric power receiving board

When the vehicle is charging, the conductive plate of the current collecting equipment that contacts with the power supply bank.

5.1 Vehicle

The complete supercapacitor electric city bus shall meet the requirements of relevant standards AND comply with the relevant national mandatory standards.

5.1.4 The signs of the operating parts, indicators, signaling devices shall meet the requirements of GB/T 4094.2.

5.1.5 The technical requirements for instruments and displays shall comply with the provisions of GB/T 19836.

5.1.1 Environment

Supercapacitor electric city buses shall be able to run normally, under natural conditions which have an ambient temperature range of -25 °C ~ 45 °C.

5.1.2 Performance

5.1.2.1 When tested according to the procedures specified in 6.3, the maximum speed of the supercapacitor electric city bus shall not be less than 50 km/h.

5.1.2.2 Make the supercapacitors fully charged, according to the charging procedure specified by the manufacturer. In this state, the vehicle accelerates from rest to 40 km/h; the acceleration time is not more than 18 s.

5.1.2.3 When the supercapacitor electric city bus is tested, according to the method in 6.4, its full-load effective running distance is >= 5 km, meanwhile the average energy consumption rate of a 12-meter bus is <= 1500 Wh/km. Other types of supercapacitor electric city buses shall be implemented, according to this standard.

5.1.2.4 Supercapacitor electric city buses shall have the function of braking energy recovery.

5.1.2.5 The maximum gradeability of supercapacitor electric city buses is >= 12%.

5.1.2.6 When the vehicle needs to stop for charging during the driving process, the inter-station charging time of the supercapacitor electric city bus shall be <= 30 s.

5.1.2.7 When tested according to the method specified in 6.5, the supercapacitor electric city bus's acceleration noise, outside the vehicle, shall meet the requirements of GB 1495.

5.1.3 Safety

5.1.3.1 The insulation of supercapacitor electric city buses shall comply with the provisions in 3.1.13 of CJ/T 5007-1993.

5.1.3.2 The electromagnetic interference of supercapacitor electric city buses shall comply with the provisions of GB/T 18387-2008.

5.1.3.3 The output end of the supercapacitor energy storage system shall have a manual or automatic disconnection device.

5.1.3.4 The supercapacitor energy storage system must have an obvious break point and its mark for separating the components into two or more groups, so as to facilitate safe maintenance.

5.1.3.5 The drive motor and its control system shall meet the requirements of GB/T 18488.1.

5.1.3.6 The vehicle controller shall meet the requirements of 3.6, 3.7, 3.8, 3.9, 3.10, 3.12 of QC/T 413-2002.

5.1.3.7 When the vehicle is connected to an external circuit (for example: power grid, external charging data), the vehicle cannot be moved by its own drive system.

5.1.3.8 The waterproof performance of supercapacitor electric city buses shall comply with the provisions in Chapter 7 of GB/T 18384.3-2001.

5.2 High voltage electrical

5.2.1 High-voltage electrical equipment and wiring

High-voltage electrical equipment and wiring shall comply with the relevant provisions of CJ/T 5007.

5.2.2 Supercapacitor system

5.2.2.1 Safety features

The safety performance of supercapacitors shall comply with the provisions of 5.13, 5.14, 5.15 in QC/T 741-2006.

5.2.2.2 Sign

The safety warning of the supercapacitor bank, which is installed on the supercapacitor electric city bus, shall comply with the requirements in Chapter 4 of GB/T 18384.1-2001. When people approach the supercapacitor, they shall be able to see the corresponding sign.

5.2.3 Current collecting equipment

5.2.3.1 The rising or falling time of the electric power receiving board shall not exceed

6.3 Maximum speed

When the supercapacitor electric city buses are subject to the maximum speed test, refer to the provisions in 7.3 of GB/T 18385-2005 to make the following changes:

The length of the measurement area for the maximum speed test of the supercapacitor electric city bus is 200 m, namely: accelerate on a straight track (road) or a circular runway; reach the maximum speed before entering the measurement area; keep driving at this speed for 200 m; record the time for the vehicle to continue to drive for 200 m.

Calculate the maximum vehicle speed, according to the method in GB/T 18385.

6.4 Full-load effective running distance and average energy consumption

6.4.1 Vehicle preparation

a) According to the requirements in Chapter 3 of CJ/T 5008-1993, adjust the test state of the vehicle;

b) The vehicle is fully loaded;

c) Make the supercapacitor fully charged, according to the charging procedure specified by the manufacturer;

d) Turn off the non-driving electrical devices of the vehicle.

6.4.2 Test conditions

a) The test vehicle has traveled at least 100 km with the on-board supercapacitor bank;

b) The test shall be carried out on a flat (slope shall not be greater than 1%), dry, clean hard road;

c) Test environment requirements: wind speed <= 3 m/s, ambient temperature 5 °C ~ 32 °C.

6.4.3 Test procedure

a) Park the test vehicle with the test equipment installed, at the starting point of the test road;

b) Depress the accelerator pedal to the bottom, to accelerate the vehicle to 40 km/h in the shortest time; try to keep the vehicle running at a constant speed of (40 ± 1) km/h until the working voltage of the supercapacitor drops to the cut-off voltage;

c) Measure and record the driving distance of the test vehicle, from the start to when the voltage drops to the cut-off voltage;

d) After fully charging the supercapacitor again, record the charged energy E. Follow the provisions of a) ~ d) to reverse the test once. Between the execution of each of the above two steps, if the vehicle needs to be moved, it is not allowed to use on-board energy to move the vehicle, nor is it allowed to use the recovered braking energy;

e) The average value of the total mileage of the two tests is the full-load effective running distance L of the supercapacitor electric city bus; the average value of the electric energy charged twice is the output energy E0 of the supercapacitor;

f) The average energy consumption C is calculated, according to the following formula:

Where: C - Average energy consumption, in watt-hour/km (Wh/km);

E0 - The output energy of the supercapacitor, in watt-hour (Wh);

L - The effective running distance with full load, in kilometer (km).

6.5 Acceleration noise outside the vehicle

The test method of supercapacitor electric city bus's exterior acceleration noise refers to the provisions in 4.1.1 of GB/T 18388-2005. The following changes are made at the same time: the speed of line-entering is changed to 75% of the maximum speed specified by the manufacturer.