Regulation No. 100-01

Name:Regulation No. 100-01
Description:Approval of Vehicles with Electric Power Train.
Official Title:Uniform Provisions Concerning the Approval of Vehicles with Regard to Specific Requirements for the Electric Power Train
Country:ECE - United Nations
Date of Issue:2011-03-21
Amendment Level:01 Series, Supplement 4
Number of Pages:42
Vehicle Types:Bus, Car, Heavy Truck, Light Truck
Subject Categories:Prior Versions
Available on InterRegs.NET

Our online subscription service, offering immediate access to our extensive library of global vehicle regulations, standards and legislation. A fully searchable, accurate, user-friendly resource for consolidated regulations that are updated quickly and frequently.

Tell me more | Already a subscriber

Available on SelectRegs.com

Our fast and easy means of purchasing up-to-date global vehicle and component standards and regulations on a pay-as-you-go basis. Pay securely by credit card and your documents are delivered directly and immediately to your computer as PDF files.

Tell me more | Go straight to site

Keywords:

vehicle, hydrogen, voltage, test, approval, enclosure, regulation, electrical, type, battery, system, high, isolation, paragraph, resistance, parts, charge, annex, temperature, electric, means, chassis, power, volume, chamber, reess, circuit, charging, series, amendments, traction, connected, on-board, live, pressure, emissions, calibration, bus, measurement, protection, normal, manufacturer, force, measured, emission, vehicles, date, analyser, period, failure

Text Extract:

All InterRegs documents are formatted as PDF files and contain the full text, tables, diagrams and illustrations of the original as issued by the national government authority. We do not re-word, summarise, cut or interpret the regulatory documents. They are consolidated, published in English, and updated on a regular basis. The following text extract indicates the scope of the document, but does not represent the actual PDF content.

E/ECE/324
) Rev.2/Add.99/Rev.1/Amend.4
E/ECE/TRANS/505 )
February 5, 2016
STATUS OF UNITED NATIONS REGULATION
ECE 100-01
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
VEHICLES WITH REGARD TO SPECIFIC
REQUIREMENTS FOR THE ELECTRIC POWER TRAIN
Incorporating:
00 series of amendments
Date of Entry into Force: 23.08.96
Corr. 1 to the 00 series of amendments
Dated: 28.06.96
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 21.02.02
01 series of amendments
Date of Entry into Force: 04.12.10
Supplement 1 to the 01 series of amendments
Date of Entry into Force: 26.07.12
Supplement 2 to the 01 series of amendments
Date of Entry into Force: 15.07.13
Supplement 3 to the 01 series of amendments
Date of Entry into Force: 10.06.14
Supplement 4 to the 01 series of amendments
Date of Entry into Force: 29.01.16

REGULATION
1. Scope
2. Definitions
REGULATION No. 100-01
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF VEHICLES WITH
REGARD TO SPECIFIC REQUIREMENTS FOR THE ELECTRIC POWER TRAIN
3. Application for approval
4. Approval
5. Specifications and tests
CONTENTS
6. Modifications and extension of the type approval for vehicle type
7. Conformity of production
8. Penalties for non-conformity of production
9. Production definitely discontinued
10. Names and addresses of technical services responsible for conducting approval tests and of
administrative departments
11. Transitional provisions
ANNEXES
Annex 1 − Communication
Annex 2 − Arrangements of approval marks
Annex 3 − Protection against direct contacts of parts under voltage
Annex 4 − Isolation resistance measurement method
Annex 5 − Confirmation method for function of on-board isolation resistance monitoring system
Annex 6 − Part 1: Essential characteristics of road vehicles or systems
Part 2:
Essential characteristics of road vehicles or systems with chassis
connected electrical circuits
Annex 7

Determination of hydrogen emissions during the charge procedures of the traction
battery

2.13. "External electric power supply" means an alternating current (ac) or direct current (dc)
electric power supply outside of the vehicle.
2.14. "High Voltage" means the classification of an electric component or circuit, if its working
voltage is >60V and ≤1500Vdc or >30V and ≤1000Vac root mean square (rms).
2.15. "High voltage bus" means the electrical circuit, including the coupling system for charging
the REESS that operates on high voltage.
Where electrical circuits, that are galvanically connected to each other, are galvanically
connected to the electrical chassis and the maximum voltage between any live part and the
electrical chassis or any exposed conductive part is ≤30Vac and ≤60Vdc, only the
components or parts of the electric circuit that operate on high voltage are classified as a
high voltage bus.
2.16. "Indirect contact" means the contact of persons with exposed conductive parts.
2.17. "Live parts" means the conductive part(s) intended to be electrically energized in normal
use.
2.18. "Luggage compartment" means the space in the vehicle for luggage accommodation,
bounded by the roof, hood, floor, side walls, as well as by the barrier and enclosure
provided for protecting the occupants from direct contact with live parts, being separated
from the passenger compartment by the front bulkhead or the rear bulk head.
2.19. "On-board isolation resistance monitoring system" means the device which monitors
the isolation resistance between the high voltage buses and the electrical chassis.
2.20. "Open type traction battery" means a liquid type battery requiring refilling with water and
generating hydrogen gas released to the atmosphere.
2.21. "Passenger compartment" means the space for occupant accommodation, bounded by
the roof, floor, side walls, doors, window glass, front bulkhead and rear bulkhead, or rear
gate, as well as by the barriers and enclosures provided for protecting the occupants from
direct contact with live parts.
2.22. "Protection degree" means the protection provided by a barrier/enclosure related to the
contact with live parts by a test probe, such as a test finger (IPXXB) or a test wire (IPXXD),
as defined in Annex 3.
2.23. "Rechargeable energy storage system (REESS)" means the rechargeable energy
storage system that provides electric energy for electric propulsion.
2.24. "Service disconnect" means the device for deactivation of the electrical circuit when
conducting checks and services of the REESS, fuel cell stack, etc.
2.25. "Solid insulator" means the insulating coating of wiring harnesses provided in order to
cover and protect the live parts against direct contact from any direction of access; covers
for insulating the live parts of connectors, and varnish or paint for the purpose of insulation.

4.4. There shall be affixed, conspicuously and in a readily accessible place specified on the
approval form, to every vehicle conforming to a vehicle type approved under this Regulation
an international approval mark consisting of:
4.4.1. A circle surrounding the Letter "E" followed by the distinguishing number of the country
which has granted approval .
4.4.2. The number of this Regulation, followed by the Letter "R", a dash and the approval number
to the right of the circle described in Paragraph 4.4.1.
4.5. If the vehicle conforms to a vehicle type approved under one or more other Regulations
annexed to the Agreement in the country which has granted approval under this Regulation,
the symbol prescribed in Paragraph 4.4.1. need not be repeated; in this case the Regulation
and approval numbers and the additional symbols of all the Regulations under which
approval has been granted in the country which has granted approval under this Regulation
shall be placed in vertical columns to the right of the symbol prescribed in Paragraph 4.4.1.
4.6. The approval mark shall be clearly legible and shall be indelible.
4.7. The approval mark shall be placed on or close to the vehicle data plate affixed by the
Manufacturer.
4.8. Annex 2 to this Regulation gives examples of the arrangements of the approval mark.
5. SPECIFICATIONS AND TESTS
5.1. Protection against Electrical Shock
These electrical safety requirements apply to high voltage buses under conditions where
they are not connected to external high voltage power supplies.

5.1.1.4.2. The symbol shall also be visible on enclosures and barriers, which, when removed expose
live parts of high voltage circuits. This provision is optional to any connector for high voltage
buses. This provision shall not apply to any of the following cases:
(a)
(b)
Where barriers or enclosures cannot be physically accessed, opened, or removed;
unless other vehicle components are removed with the use of tools;
Where barriers or enclosures are located underneath the vehicle floor.
5.1.1.4.3. Cables for high voltage buses which are not located within enclosures shall be identified by
having an outer covering with the colour orange.
5.1.2. Protection against Indirect Contact
5.1.2.1. For protection against electrical shock which could arise from indirect contact, the exposed
conductive parts, such as the conductive barrier and enclosure, shall be galvanically
connected securely to the electrical chassis by connection with electrical wire or ground
cable, or by welding, or by connection using bolts, etc. so that no dangerous potentials are
produced.
5.1.2.2. The resistance between all exposed conductive parts and the electrical chassis shall be
lower than 0.1 ohm when there is current flow of at least 0.2 amperes.
This requirement is satisfied if the galvanic connection has been established by welding.
5.1.2.3. In the case of motor vehicles which are intended to be connected to the grounded external
electric power supply through the conductive connection, a device to enable the galvanical
connection of the electrical chassis to the earth ground shall be provided.
The device should enable connection to the earth ground before exterior voltage is applied
to the vehicle and retain the connection until after the exterior voltage is removed from the
vehicle.
Compliance to this requirement may be demonstrated either by using the connector
specified by the car manufacturer, or by analysis.
5.1.3. Isolation Resistance
This Paragraph shall not apply to chassis connected electrical circuits where the maximum
voltage between any live part and the electrical chassis or any exposed conductive part
does not exceed 30Vac (rms) or 60Vdc.
5.1.3.1. Electric Power train consisting of Separate Direct Current- or Alternating Current-buses
If ac high voltage buses and dc high voltage buses are galvanically isolated from each
other, isolation resistance between the high voltage bus and the electrical chassis shall
have a minimum value of 100Ω/V of the working voltage for dc buses, and a minimum value
of 500Ω/V of the working voltage for ac buses.
The measurement shall be conducted according to Annex 4 "Isolation resistance
measurement method".

5.2. Rechargeable Energy Storage System (REESS)
5.2.1. Protection against Excessive Current
The REESS shall not overheat.
If the REESS is subject to overheating due to excessive current, it shall be equipped with a
protective device such as fuses, circuit breakers or main contactors.
However, the requirement may not apply if the manufacturer supplies data that ensure that
overheating from excessive current is prevented without the protective device.
5.2.2. Accumulation of Gas
Places for containing open type traction battery that may produce hydrogen gas shall be
provided with a ventilation fan or a ventilation duct to prevent the accumulation of hydrogen
gas.
5.3. Functional Safety
At least a momentary indication shall be given to the driver when the vehicle is in "active
driving possible mode''.
However, this provision does not apply under conditions where an internal combustion
engine provides directly or indirectly the vehicle's propulsion power.
When leaving the vehicle, the driver shall be informed by a signal (e.g. optical or audible
signal) if the vehicle is still in the active driving possible mode.
If the on-board REESS can be externally charged by the user, vehicle movement by its own
propulsion system shall be impossible as long as the connector of the external electric
power supply is physically connected to the vehicle inlet.
This requirement shall be demonstrated by using the connector specified by the car
manufacturer.
The state of the drive direction control unit shall be identified to the driver.
5.4. Determination of Hydrogen Emissions
5.4.1. This test shall be carried out on all vehicles equipped with open type traction batteries.
5.4.2. The test shall be conducted following the method described in Annex 7 to the present
Regulation. The hydrogen sampling and analysis shall be the ones prescribed. Other
analysis methods can be approved if it is proven that they give equivalent results.
5.4.3. During a normal charge procedure in the conditions given in Annex 7, hydrogen emissions
shall be below 125g during 5h, or below 25 × t g during t (in h).
5.4.4. During a charge carried out by an on-board charger presenting a failure (conditions given in
Annex 7), hydrogen emissions shall be below 42g. Furthermore the on-board charger shall
limit this possible failure to 30min.

7.3.4. Analyse the results of each type of test, in order to verify and ensure the consistency of
characteristics of the vehicle, making allowance for permissible variations in industrial
production;
7.3.5. Ensure that for each type of vehicle at least the tests prescribed in Paragraph 5 of this
Regulation are carried out;
7.3.6. Ensure that any set of samples or test pieces giving evidence of non-conformity with the
type of test in question shall give rise to a further sampling and test. All necessary steps
shall be taken to re-establish conformity of the corresponding production.
7.4. The competent Authority which has granted type approval may at any time verify the
conformity control methods applied in each production unit.
7.4.1. At every inspection, the test records and production records shall be presented to the
visiting inspector.
7.4.2. The inspector may take samples at random to be tested in the manufacturer's laboratory.
The minimum number of samples may be determined according to the results of the
manufacturer's own checks.
7.4.3. When the quality level appears unsatisfactory or when it seems necessary to verify the
validity of the tests carried out in application of Paragraph 7.4.2., the inspector shall select
samples to be sent to the technical service which has conducted the type approval tests.
7.4.4. The competent Authority may carry out any test prescribed in this Regulation.
7.4.5. The normal frequency of inspections by the competent Authority shall be one per year. If
unsatisfactory results are recorded during one of these visits, the competent Authority shall
ensure that all necessary steps are taken to re-establish the conformity of production as
rapidly as possible.
8. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
8.1. The approval granted in respect of a vehicle type, pursuant to this Regulation may be
withdrawn if the requirements laid down in Paragraph 7. above are not complied with, or if
the vehicle or its components fail to pass the tests provided for in Paragraph 7.3.5. above.
8.2. If a Contracting Party to the Agreement applying this Regulation withdraws an approval it
has previously granted, it shall forthwith so notify the other Contracting Parties applying this
Regulation, by means of a communication form conforming to the Model in Annex 1 to this
Regulation.
9. PRODUCTION DEFINITELY DISCONTINUED
If the holder of the approval completely ceases to manufacture a type of vehicle approved in
accordance with this Regulation, he shall so inform the Authority which granted the
approval. Upon receiving the relevant communication, that Authority shall inform thereof the
other Contracting Parties to the 1958 Agreement applying this Regulation by means of a
communication form conforming to the model in Annex 1 to this Regulation.

ANNEX 1
COMMUNICATION
(maximum format: A4 (210 × 297mm))
issued by:
Name of administration
.............................................
.............................................
.............................................
concerning:
APPROVAL GRANTED,
APPROVAL EXTENDED,
APPROVAL REFUSED,
APPROVAL WITHDRAWN,
PRODUCTION DEFINITELY DISCONTINUED,
of a road vehicle pursuant to Regulation No. 100.
Approval No. .................................................. Extension No .................................
1. Trade name or mark of the vehicle: ..........................................................................................
2. Vehicle type: ..............................................................................................................................
3. Vehicle category: .......................................................................................................................
4. Manufacturer's name and address: ..........................................................................................
5. If applicable, name and address of manufacturer's representative: .........................................
6. Description of the vehicle: .........................................................................................................
6.1. REESS type: .............................................................................................................................
6.2. Working voltage: .......................................................................................................................
6.3. Propulsion system (e.g. hybrid, electric): ..................................................................................
7. Vehicle submitted for approval on: ............................................................................................
8. Technical service responsible for conducting approval tests: ..................................................
9. Date of report issued by that service: .......................................................................................

ANNEX 2
ARRANGEMENTS OF APPROVAL MARKS
MODEL A
(See Paragraph 4.4. of this Regulation)
a = 8mm min.
The above approval mark affixed to a vehicle shows that the road vehicle type concerned has been
approved in the Netherlands (E4), pursuant to Regulation No. 100 and under the approval No. 012492.
The first two digits of the approval number indicate that the approval was granted in accordance with the
requirements of Regulation No. 100 as amended by 01 series of amendments.
MODEL B
(See Paragraph 4.5. of this Regulation)
a = 8mm min.
The above approval mark affixed to a vehicle shows that the road vehicle concerned has been approved
in the Netherlands (E4), pursuant to Regulation Nos. 100 and 42 The first two digits of the approval
numbers indicate that, at the dates when respective approvals were granted, Regulation No. 100 was
amended by the 01 series of amendments and Regulation No. 42 was still in its original form.

First
numeral
Addition.
letter
TABLE 1
ACCESS PROBES FOR THE TESTS FOR PROTECTION
OF PERSONS AGAINST ACCESS TO HAZARDOUS PARTS
Access probe
(Dimensions in mm)
Test
force
2 B 10N ± 10%
4, 5, 6 D 1N ± 10%

ANNEX 4
ISOLATION RESISTANCE MEASUREMENT METHOD
1. GENERAL
The isolation resistance for each high voltage bus of the vehicle shall be measured or shall
be determined by calculation using measurement values from each part or component unit
of a high voltage bus (hereinafter referred to as the "divided measurement").
2. MEASUREMENT METHOD
The isolation resistance measurement shall be conducted by selecting an appropriate
measurement method from among those listed in Paragraphs 2.1. through 2.2., depending
on the electrical charge of the live parts or the isolation resistance, etc.
The range of the electrical circuit to be measured shall be clarified in advance, using
electrical circuit diagrams, etc.
Moreover, modification necessary for measuring the isolation resistance may be carried out,
such as removal of the cover in order to reach the live parts, drawing of measurement lines,
change in software, etc.
In cases where the measured values are not stable due to the operation of the on-board
isolation resistance monitoring system, etc., necessary modification for conducting the
measurement may be carried out, such as stopping of the operation of the device
concerned or removing it. Furthermore, when the device is removed, it shall be proven,
using drawings, etc., that it will not change the isolation resistance between the live parts
and the electrical chassis.
Utmost care shall be exercised as to short circuit, electric shock, etc., for this confirmation
might require direct operations of the high-voltage circuit.
2.1. Measurement Method using dc Voltage from Off-vehicle Sources
2.1.1. Measurement Instrument
An isolation resistance test instrument capable of applying a dc voltage higher than the
working voltage of the high voltage bus shall be used.
2.1.2. Measurement Method
An insulator resistance test instrument shall be connected between the live parts and the
electrical chassis. Then, the isolation resistance shall be measured by applying a dc voltage
at least half of the working voltage of the high voltage bus.
If the system has several voltage ranges (e.g. because of boost converter) in galvanically
connected circuit and some of the components cannot withstand the working voltage of the
entire circuit, the isolation resistance between those components and the electrical chassis
can be measured separately by applying at least half of their own working voltage with those
component disconnected.

2.2.3.4. Fourth Step
If V1 is greater than or equal to V2, insert a standard known resistance (Ro) between the
negative side of the high voltage bus and the
electrical chassis. With Ro installed, measure
the voltage (V1’) between the negative side of the high voltage bus and the
electrical
chassis ( see Figure 2).
Calculate
the electrical isolation (Ri) according
to the following formula:
Ri = Ro*( (Vb/V1' – Vb/V1) or Ri = Ro*Vb*(1/V1' – 1/V1)
Figure 2
Measurement of V1'
If V2 is greater than V1, insert a standard known resistance (Ro) between the positive side
of the high voltage bus and the electrical chassis. With Ro installed, measure the voltage
(V2') between the positive side of the high voltage bus and the electrical chassis
(see Figure 3). Calculate the electrical isolation (Ri) according to the formula shown. Divide
this electrical isolation value (in Ω) by the nominal operating voltage of the high voltage bus
(in volts).
Calculate
the electrical isolation (Ri) according
to the following formula:
Ri = Ro*( (Vb/V2' – Vb/V2) or Ri = Ro*Vb*(1/V2' – 1/V2)

ANNEX 5
CONFIRMATION METHOD FOR FUNCTION OF ON-BOARD
ISOLATION RESISTANCE MONITORING SYSTEM
The function of the on-board isolation resistance monitoring system shall be confirmed by the following
method:
Insert a resistor that does not cause the isolation resistance between the terminal being monitored and
the electrical chassis to drop below the minimum required isolation resistance value. The warning shall
be activated.

4. FUEL CELL (if any)
4.1. Trade name and mark of the fuel cell: ...........................................................................................
4.2. Types of fuel cell: ...........................................................................................................................
4.3. Nominal voltage (V): .......................................................................................................................
4.4. Number of cells: .............................................................................................................................
4.5. Type of cooling system (if any): .....................................................................................................
4.6. Max Power(kW): .............................................................................................................................
5. FUSE AND/OR CIRCUIT BREAKER
5.1. Type: ..............................................................................................................................................
5.2. Diagram showing the functional range: ..........................................................................................
6. POWER WIRING HARNESS
6.1. Type: ..............................................................................................................................................
7. PROTECTION AGAINST ELECTRIC SHOCK
7.1. Description of the protection concept: ............................................................................................
8. ADDITIONAL DATA
8.1. Brief description of the power circuit components installation or drawings/pictures showing the
location of the power circuit components installation: ....................................................................
8.2. Schematic diagram of all electrical functions included in power circuit: ........................................
8.3. Working voltage (V): .......................................................................................................................

ANNEX 7
DETERMINATION OF HYDROGEN EMISSIONS DURING
THE CHARGE PROCEDURES OF THE TRACTION BATTERY
1. INTRODUCTION
This Annex describes the procedure for the determination of hydrogen emissions during the
charge procedures of the traction battery of all road vehicles, according to Paragraph 5.4. of
this Regulation.
2. DESCRIPTION OF TEST
The hydrogen emission test (Figure 1 of the present Annex) is conducted in order to
determine hydrogen emissions during the charge procedures of the traction battery with the
on-board charger. The test consists in the following steps:
(a)
(b)
(c)
(d)
Vehicle preparation;
Discharge of the traction battery;
Determination of hydrogen emissions during a normal charge;
Determination of hydrogen emissions during a charge carried out with the on-board
charger failure.
3. VEHICLE
3.1. The vehicle shall be in good mechanical condition and have been driven at 300 km during
seven days before the test. The vehicle shall be equipped with the traction battery subject to
the test of hydrogen emissions, over this period.
3.2. If the battery is used at a temperature above the ambient temperature, the operator shall
follow the manufacturer's procedure in order to keep the traction battery temperature in
normal functioning range.
The manufacturer's representative shall be able to certify that the temperature conditioning
system of the traction battery is neither damaged nor presenting a capacity defect.

4. TEST EQUIPMENT FOR HYDROGEN EMISSION TEST
4.1. CHASSIS DYNAMOMETER
The chassis dynamometer shall meet the requirements of the 05 series of amendments to
Regulation No. 83.
4.2. Hydrogen Emission Measurement Enclosure
The hydrogen emission measurement enclosure shall be a gas-tight measuring chamber
able to contain the vehicle under test. The vehicle shall be accessible from all sides and the
enclosure when sealed shall be gas-tight in accordance with Appendix 1 to this Annex. The
inner surface of the enclosure shall be impermeable and non-reactive to hydrogen. The
temperature conditioning system shall be capable of controlling the internal enclosure air
temperature to follow the prescribed temperature throughout the test, with an average
tolerance of ±2K over the duration of the test.
To accommodate the volume changes due to enclosure hydrogen emissions, either a
variable-volume or another test equipment may be used. The variable-volume enclosure
expands and contracts in response to the hydrogen emissions in the enclosure. Two
potential means of accommodating the internal volume changes are movable panels, or a
bellows design, in which impermeable bags inside the enclosure expand and contract in
response to internal pressure changes by exchanging air from outside the enclosure. Any
design for volume accommodation shall maintain the integrity of the enclosure as specified
in Appendix 1 to this Annex.
Any method of volume accommodation shall limit the differential between the enclosure
internal pressure and the barometric pressure to a maximum value of ±5hPa.
The enclosure shall be capable of latching to a fixed volume. A variable volume enclosure
shall be capable of accommodating a change from its "nominal volume" (see Annex 7,
Appendix 1, Paragraph 2.1.1.), taking into account hydrogen emissions during testing.
4.3. Analytical Systems
4.3.1. Hydrogen Analyser
4.3.1.1. The atmosphere within the chamber is monitored using a hydrogen analyser
(electrochemical detector type) or a chromatograph with thermal conductivity detection.
Sample gas shall be drawn from the mid-point of one side-wall or roof of the chamber and
any bypass flow shall be returned to the enclosure, preferably to a point immediately
downstream of the mixing fan.
4.3.1.2. The hydrogen analyser shall have a response time to 90% of final reading of less than 10s.
Its stability shall be better than 2% of full scale at zero and at 80% ± 20% of full scale, over
a 15min period for all operational ranges.
4.3.1.3. The repeatability of the analyser expressed as one standard deviation shall be better than
1% of full scale, at zero and at 80% ± 20% of full scale on all ranges used.
4.3.1.4. The operational ranges of the analyser shall be chosen to give best resolution over the
measurement, calibration and leak checking procedures.

4.7. Fans
4.8. Gases
The chamber shall be equipped with one or more fans or blowers with a possible flow of
0.1 to 0.5m /second in order to thoroughly mix the atmosphere in the enclosure. It shall be
possible to reach a homogeneous temperature and hydrogen concentration in the chamber
during measurements. The vehicle in the enclosure shall not be subjected to a direct stream
of air from the fans or blowers.
4.8.1. The following pure gases shall be available for calibration and operation:
(a) Purified synthetic air (purity <1ppm C equivalent; <1ppm CO; <400ppm CO ;
<0.1ppm NO); oxygen content between 18 and 21% by volume,
(b)
Hydrogen (H ), 99.5% minimum purity.
4.8.2. Calibration and span gases shall contain mixtures of hydrogen (H ) and purified synthetic
air. The real concentrations of a calibration gas shall be within ±2% of the nominal values.
The accuracy of the diluted gases obtained when using a gas divider shall be within ±2% of
the nominal value. The concentrations specified in Appendix 1 may also be obtained by a
gas divider using synthetic air as the dilution gas.
5. TEST PROCEDURE
The test consists in the five following steps:
(a)
(b)
(c)
(d)
(e)
Vehicle preparation;
Discharge of the traction battery;
Determination of hydrogen emissions during a normal charge;
Discharge of the traction battery;
Determination of hydrogen emissions during a charge carried out with the on-board
charger failure.
If the vehicle has to be moved between two steps, it shall be pushed to the following test
area.
5.1. Vehicle Preparation
The ageing of traction battery shall be checked, proving that the vehicle has performed at
least 300 km during seven days before the test. During this period, the vehicle shall be
equipped with the traction battery submitted to the hydrogen emission test. If this cannot be
demonstrated then the following procedure will be applied.

5.4. Hydrogen Emission Test During a Normal Charge
5.4.1. Before the completion of the soak period, the measuring chamber shall be purged for
several minutes until a stable hydrogen background is obtained. The enclosure mixing
fan(s) shall also be turned on at this time.
5.4.2. The hydrogen analyser shall be zeroed and spanned immediately prior to the test.
5.4.3. At the end of the soak, the test vehicle, with the engine shut off and the test vehicle windows
and luggage compartment opened shall be moved into the measuring chamber.
5.4.4. The vehicle shall be connected to the mains. The battery is charged according to normal
charge procedure as specified in Paragraph 5.4.7. below.
5.4.5. The enclosure doors are closed and sealed gas-tight within 2min from electrical interlock of
the normal charge step.
5.4.6. The start of a normal charge for hydrogen emission test period begins when the chamber is
sealed. The hydrogen concentration, temperature and barometric pressure are measured to
give the initial readings C , T and P for the normal charge test.
These figures are used in the hydrogen emission calculation (Paragraph 6.). The ambient
enclosure temperature T shall not be less than 291K and no more than 295K during the
normal charge period.
5.4.7. Procedure of Normal Charge
The normal charge is carried out with the on-board charger and consists of the following
steps:
(a) Charging at constant power during t ;
(b)
Over-charging at constant current during t . Over-charging intensity is specified by
manufacturer and corresponds to the one used during equalisation charging.
The end of traction battery charge criteria corresponds to an automatic stop given by the
on-board charger to a charging time of t + t . This charging time will be limited to t + 5h,
even if a clear indication is given to the driver by the standard instrumentation that the
battery is not yet fully charged.
5.4.8. The hydrogen analyser shall be zeroed and spanned immediately before the end of the test.
5.4.9. The end of the emission sampling period occurs t + t or t + 5h after the beginning of the
initial sampling, as specified in Paragraph 5.4.6. The different times elapsed are recorded.
The hydrogen concentration, temperature and barometric pressure are measured to give
the final readings C , T and P for the normal charge test, used for the calculation in
Paragraph 6.

6. CALCULATION
The hydrogen emission tests described in Paragraph 5. allow the calculation of the
hydrogen emissions from the normal charge and charging failure phases. Hydrogen
emissions from each of these phases are calculated using the initial and final hydrogen
concentrations, temperatures and pressures in the enclosure, together with the net
enclosure volume.
The formula below is used:
M
= k × V × 10

⎜ ⎜
⎛ 1 +

×




V
V

⎟ × C

T
× P
C



× P ⎟
T



where:
M = hydrogen mass, in grams
C = measured hydrogen concentration in the enclosure, in ppm volume
V
=
net enclosure volume in cubic metres (m ) corrected for the volume of the
vehicle, with the windows and the luggage compartment open. If the volume of
the vehicle is not determined a volume of 1.42m is subtracted.
V = Compensation volume in m , at the test temperature and pressure
T = ambient chamber temperature, in K
P = absolute enclosure pressure, in kPa
k = 2.42
where:
i is the initial reading
f is the final reading
6.1.
Results of Test
The hydrogen mass emissions for the vehicle are:
M
=
hydrogen mass emission for normal charge test, in grams
M
=
hydrogen mass emission for charging failure test, in grams

2.2.5. The chamber is then sealed and the background hydrogen concentration, temperature and
barometric pressure are measured. These are the initial readings C , T and P used in the
enclosure background calculation.
2.2.6. The enclosure is allowed to stand undisturbed with the mixing fan on for a period of four
hours.
2.2.7. At the end of this time the same analyser is used to measure the hydrogen concentration in
the chamber. The temperature and the barometric pressure are also measured. These are
the final readings C , T and P .
2.2.8. The change in mass of hydrogen in the enclosure shall be calculated over the time of the
test in accordance with Paragraph 2.4. and shall not exceed 0.5g.
2.3. Calibration and Hydrogen Retention Test of the Chamber
The calibration and hydrogen retention test in the chamber provides a check on the
calculated volume (Paragraph 2.1.) and also measures any leak rate. The enclosure leak
rate shall be determined at the enclosure's introduction to service, after any operations in
the enclosure which may affect the integrity of the enclosure, and at least monthly
thereafter. If six consecutive monthly retention checks are successfully completed without
corrective action, the enclosure leak rate may be determined quarterly thereafter as long as
no corrective action is required.
2.3.1. The enclosure shall be purged until a stable hydrogen concentration is reached. The mixing
fan is turned on, if not already switched on. The hydrogen analyser is zeroed, calibrated if
required, and spanned.
2.3.2. The enclosure shall be latched to the nominal volume position.
2.3.3. The ambient temperature control system is then turned on (if not already on) and adjusted
for an initial temperature of 293K.
2.3.4. When the enclosure temperature stabilizes at 293K ± 2K, the enclosure is sealed and the
background concentration, temperature and barometric pressure measured. These are the
initial readings C , T and P used in the enclosure calibration.
2.3.5. The enclosure shall be unlatched from the nominal volume.
2.3.6. A quantity of approximately 100g of hydrogen is injected into the enclosure. This mass of
hydrogen shall be measured to an accuracy of ±2% of the measured value.
2.3.7. The contents of the chamber shall be allowed to mix for 5min and then the hydrogen
concentration, temperature and barometric pressure are measured. These are the final
readings C , T and P for the calibration of the enclosure as well as the initial readings
C , T and P for the retention check.
2.3.8. On the basis of the readings taken in Paragraphs 2.3.4 and 2.3.7 and the formula in
Paragraph 2.4., the mass of hydrogen in the enclosure is calculated. This shall be within
±2% of the mass of hydrogen measured in Paragraph 2.3.6.

3. CALIBRATION OF THE HYDROGEN ANALYSER
The analyser should be calibrated using hydrogen in air and purified synthetic air. See
Paragraph 4.8.2. of Annex 7.
Each of the normally used operating ranges are calibrated by the following procedure:
3.1. Establish the calibration curve by at least five calibration points spaced as evenly as
possible over the operating range. The nominal concentration of the calibration gas with the
highest concentrations to be at least 80% of the full scale.
3.2. Calculate the calibration curve by the method of least squares. If the resulting polynomial
degree is greater than three, then the number of calibration points shall be at least the
number of the polynomial degree plus two.
3.3. The calibration curve shall not differ by more than 2% from the nominal value of each
calibration gas.
3.4. Using the coefficients of the polynomial derived from Paragraph 3.2. above, a table of
analyser readings against true concentrations shall be drawn by steps no greater than 1% of
full scale. This is to be carried out for each analyser range calibrated.
This table shall also contain other relevant data such as:
(a)
(b)
(c)
(d)
(e)
(f)
Date of calibration;
Span and zero potentiometer readings (where applicable);
Nominal scale;
Reference data of each calibration gas used;
Real and indicated value of each calibration gas used together with the percentage
differences;
Calibration pressure of analyser.
3.5. Alternative methods (e.g. computer, electronically controlled range switch) can be used if it
is proven to the technical service that these methods give equivalent accuracy.

Approval of Vehicles with Electric Power Train.