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QC/T 838-2010: Ultracapacitor electric city bus
QC/T 838-2010
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.080
T 47
Ultracapacitor electric city bus
ISSUED ON: NOVEMBER 22, 2010
IMPLEMENTED ON: MARCH 01, 2011
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 5
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 7
4 Models ... 7
5 Requirements ... 9
6 Test method ... 11
7 Inspection rules ... 13
8 Marking, transportation, storage ... 14
Ultracapacitor electric city bus
1 Scope
This standard specifies the terms and definitions, models, requirements, test methods,
inspection rules, signs, transportation, storage of supercapacitor electric city buses.
This standard applies to all kinds of electric city buses, that use supercapacitors as the
power source, OR use supercapacitors as the main power source.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For the dated references, the subsequent amendments
(excluding corrections) or revisions do not apply to this Standard; however, parties who
reach an agreement based on this Standard are encouraged to study if the latest versions
of these documents are applicable. For undated references, the latest edition of the
referenced document applies.
GB 1495 Limits and measurement methods for noise emitted by accelerating motor
vehicles
GB/T 4094.2 Electric vehicles - Symbols for controls, indicators and tell-tales
GB/T 12548 Motor vehicles - Speedometer and odometer - Calibration method
GB/T 18384.1-2001 Electric vehicles - Safety specification - Part 1: On-board
energy storage
GB/T 18384.3-2001 Electric vehicles - Safety specification - Part 3: Protection of
persons against electric hazards
GB/T 18385-2005 Electric vehicles - Power performance - Test method
GB/T 18387-2008 Limits and test methods of magnetic and electric field strength
from electric vehicles - Broadband 9 kHz to 30 MHz
GB/T 18388-2005 Electric vehicle - Engineering approval evaluation program
GB/T 18488.1 The electrical machines and controllers for electric vehicles - Part 1:
General specification
GB/T 18488.2 The electrical machines and controllers for electric vehicles - Part 2:
Test methods
GB/T 19596 Terminology of electric vehicles
GB/T 19836 Instrumentation for electric vehicles
QC/T 413-2002 Basic technical requirements for automotive electric equipment
QC/T 741-2006 Ultracapacitors for vehicles
QC/T 839-2010 Power supply system for ultracapacitor electric city bus
CJ/T 5007-1993 Specifications of trolleybuses
CJ/T 5008-1993 Method of test for trolleybuses
3 Terms and definitions
The terms and definitions, as established in GB/T 19596, as well as the following terms
and definitions, apply to this standard.
3.1
Ultracapacitor 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.
4 Models
The product model of a supercapacitor electric city bus is composed of the enterprise
name code, vehicle type code, main parameter code, product serial number, enterprise-
5 Requirements
5.1 Vehicle
The complete supercapacitor electric city bus shall meet the requirements of relevant
standards AND comply with the relevant national mandatory standards.
5.1.1 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.
5.1.4 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.
5.2 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.
7 Inspection rules
7.1 The inspection of supercapacitor electric city buses is divided into exit-factory
inspection and type inspection.
7.2 For the exit-factory inspection and type inspection of supercapacitor electric city
buses, it shall determine the inspection items, in accordance with the requirements of
relevant national standards and laws and regulations; meanwhile it shall include the
items in Table 2.