ISO/PAS 19295:2016
(Main)Electrically propelled road vehicles — Specification of voltage sub-classes for voltage class B
Electrically propelled road vehicles — Specification of voltage sub-classes for voltage class B
ISO/PAS 19295:2016 provides specification of voltage sub-classes for electric propulsion systems and conductively connected auxiliary electric systems of electrically propelled road vehicles. The voltage sub-classes are related to d.c. electric circuits. It applies only to electric circuits and components with maximum working voltages according to voltage class B. ISO/PAS 19295:2016 provides specifications of characteristics which are relevant for design and operation of components and systems for the standardized voltage sub-classes. It enables vehicle manufacturers and supply industry to evaluate the characteristics of components or systems for their specific vehicle applications.
Véhicules routiers à propulsion électrique — Spécification de sous-classes de tension pour les tensions de classe B
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PUBLICLY ISO/PAS
AVAILABLE 19295
SPECIFICATION
First edition
2016-04-01
Electrically propelled road vehicles —
Specification of voltage sub-classes for
voltage class B
Véhicules routiers à propulsion électrique — Spécification de sous-
classes de tension pour les tensions de classe B
Reference number
ISO/PAS 19295:2016(E)
©
ISO 2016
---------------------- Page: 1 ----------------------
ISO/PAS 19295:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/PAS 19295:2016(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Terms and definitions . 1
3 Voltage sub-classes . 2
4 Characteristics of voltage sub-classes . 3
4.1 General . 3
4.2 Component operating status . 3
4.3 Voltage operating ranges . 4
4.4 Under- and overvoltage . 5
4.4.1 General. 5
4.4.2 Overvoltage . . 5
4.4.3 Undervoltage . 6
4.5 Allocation of voltage ranges and operation status — Overview . 6
4.6 Voltage transients and ripple. 7
4.6.1 General. 7
4.6.2 Voltage slope . . 7
4.6.3 Voltage ripple . 8
4.6.4 Load dump .10
Annex A (informative) Example for voltage ranges per voltage sub-class .11
© ISO 2016 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/PAS 19295:2016(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 37,
Electrically propelled vehicles.
iv © ISO 2016 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/PAS 19295:2016(E)
Introduction
Electric systems operating at voltage class B are efficient systems for electrically propelled road
vehicles. The requirements for voltage class B electric circuits that are used for electric power transfer
for the propulsion of electric road vehicles are significantly different to those of voltage class A electric
circuits used for powernets at, for example, 12 V d.c. or 24 V d.c.
This PAS provides definition of voltage sub-classes for rechargeable energy storage system (RESS) and
electric propulsion system and lists up specified values based on maximum working voltage. Voltage
sub-classes listed in this PAS are used for voltage class B systems of all kinds of current or future
electrically propelled road vehicles. It enables vehicles manufacturers and automotive supply industry
to evaluate the characteristics of a component according to the specified sub-class.
The voltage sub-class itself and the component characteristics have large cost impact on the component
design and the overall design of the electric system. A high variety of different voltage sub-class and
operating conditions hinders the use of an existing component in different vehicle models.
Today, a huge variety of different RESS and electric propulsion system maximum working voltages are
used for electrically propelled road vehicles on the market. Because some systems use voltage boost
converters, maximum working voltage of electric propulsion system can be different from that of RESS.
This variety of maximum working voltages often results from different numbers of cells in the design
of the electrical energy source, e.g. battery stack or variety of power requirement by each vehicle. As
a consequence, many system or component designs of a voltage class B electric circuit are currently
related to one specific working voltage. When a maximum working voltage is selected for the design,
often only one supplier for a component is available. Hence, a change to another component supplier or
a change of the dedicated maximum working voltage is not possible, when the system design is finished.
It is necessary to reduce the variety of maximum working voltages in order to
— lower the component and system costs by limiting the variety of maximum working voltages,
— decouple the system or component designs of a voltage class B electric circuit from the design of the
electric energy source,
— enable an exchange of components from different suppliers during and after the system development
and to enable competition and access to the worldwide market for component suppliers, and
— support the system design by specifying basic voltage sub-classes for automotive propulsion
systems within voltage class B.
This PAS lists only those RESS and electric propulsion system voltage sub-classes which are used or
will be used in current or planned vehicle models and for which electronic parts, e.g. semiconductor
switches, are currently available without any restrictions on the market.
The range of voltage class B is too wide to be used for a component design referring to voltage.
Therefore, this PAS divides voltage class B in a set of voltages sub-classes, which enable a component
design referring to voltage for each voltage sub-class.
This specification is not intended to restrict the development of component performance or technology.
It does not exclude the use of other maximum operating voltages for an individual system design.
© ISO 2016 – All rights reserved v
---------------------- Page: 5 ----------------------
PUBLICLY AVAILABLE SPECIFICATION ISO/PAS 19295:2016(E)
Electrically propelled road vehicles — Specification of
voltage sub-classes for voltage class B
1 Scope
This PAS provides specification of voltage sub-classes for electric propulsion systems and conductively
connected auxiliary electric systems of electrically propelled road vehicles.
The voltage sub-classes are related to d.c. electric circuits.
It applies only to electric circuits and components with maximum working voltages according to voltage
class B.
This PAS provides specifications of characteristics which are relevant for design and operation of
components and systems for the standardized voltage sub-classes.
It enables vehicle manufacturers and supply industry to evaluate the characteristics of components or
systems for their specific vehicle applications.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
component operating status
describes the general functional behaviour of components which depend directly on the voltage in
voltage class B electric circuits
2.2
customer
party that is interested in using voltage class B component or system
2.3
DUT
device under test
2.4
electric circuit
entire set of interconnected live parts through which electrical current is designed to flow under
normal operating conditions
2.5
electric propulsion system maximum working voltage
highest value of d.c. voltage that can occur in an electric propulsion system under any normal operating
conditions according to the customer’s specifications, disregarding transients
2.6
maximum working voltage
highest value of a.c. voltage (rms) or of d.c. voltage that can occur in an electric system under any normal
operating condition according to the customer’s specifications, disregarding transients
Note 1 to entry: In this definition taken from ISO 6469-3, transients include ripple.
© ISO 2016 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO/PAS 19295:2016(E)
2.7
rechargeable energy storage system
RESS
system that stores energy for delivery of electric power and which is rechargeable
EXAMPLE Batteries, capacitors, etc.
2.8
ripple
set of unwanted periodic deviations with respect to the average value of the measured or supplied
quantity, occurring at frequencies which can be related to that of components within a system
2.9
supplier
party that provides voltage class B component or system
2.10
transient
pertaining to or designating a phenomenon or a quantity which varies between two consecutive steady
states during a time interval short compared with the time-scale of interest
2.11
voltage class B
classification of an electric component or circuit with a maximum working voltage between 30 V a.c.
(rms) and 1 000 V a.c. (rms) or between 60 V d.c. and 1 500 V d.c
Note 1 to entry: Values for voltage class B are taken from ISO 6469-3.
2.12
upper voltage limit
maximum voltage of a voltage class B sub-class
Note 1 to entry: Maximum working voltages within a voltage sub-class are less than or equal to the voltage limit.
2.13
voltage range
general term covering voltage sub-class, working voltages and deviations from working voltages
2.14
voltage sub-class
classification of an electric component or circuit with a d.c. voltage within the voltage class B
2.15
working voltage
a.c. voltage (rms) or d.c. voltage that can occur in an electric system under normal operating condition
...
PUBLICLY ISO/PAS
AVAILABLE 19295
SPECIFICATION
First edition
Electrically propelled road vehicles —
Specification of voltage sub-classes for
voltage class B
Véhicules routiers à propulsion électrique — Spécification de sous-
classes de tension pour les tensions de classe B
PROOF/ÉPREUVE
Reference number
ISO/PAS 19295:2016(E)
©
ISO 2016
---------------------- Page: 1 ----------------------
ISO/PAS 19295:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/PAS 19295:2016(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Terms and definitions . 1
3 Voltage sub-classes . 2
4 Characteristics of voltage sub-classes . 3
4.1 General . 3
4.2 Component operating status . 3
4.3 Voltage operating ranges . 4
4.4 Under- and overvoltage . 5
4.4.1 General. 5
4.4.2 Overvoltage . . 5
4.4.3 Undervoltage . 6
4.5 Allocation of voltage ranges and operation status — Overview . 6
4.6 Voltage transients and ripple. 7
4.6.1 General. 7
4.6.2 Voltage slope . . 7
4.6.3 Voltage ripple . 8
4.6.4 Load dump .10
Annex A (informative) Example for voltage ranges per voltage sub-class .11
© ISO 2016 – All rights reserved PROOF/ÉPREUVE iii
---------------------- Page: 3 ----------------------
ISO/PAS 19295:2016(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 37,
Electrically propelled vehicles.
iv PROOF/ÉPREUVE © ISO 2016 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/PAS 19295:2016(E)
Introduction
Electric systems operating at voltage class B are efficient systems for electrically propelled road
vehicles. The requirements for voltage class B electric circuits that are used for electric power transfer
for the propulsion of electric road vehicles are significantly different to those of voltage class A electric
circuits used for powernets at, for example, 12 V d.c. or 24 V d.c.
This PAS provides definition of voltage sub-classes for rechargeable energy storage system (RESS) and
electric propulsion system and lists up specified values based on maximum working voltage. Voltage
sub-classes listed in this PAS are used for voltage class B systems of all kinds of current or future
electrically propelled road vehicles. It enables vehicles manufacturers and automotive supply industry
to evaluate the characteristics of a component according to the specified sub-class.
The voltage sub-class itself and the component characteristics have large cost impact on the component
design and the overall design of the electric system. A high variety of different voltage sub-class and
operating conditions hinders the use of an existing component in different vehicle models.
Today, a huge variety of different RESS and electric propulsion system maximum working voltages are
used for electrically propelled road vehicles on the market. Because some systems use voltage boost
converters, maximum working voltage of electric propulsion system can be different from that of RESS.
This variety of maximum working voltages often results from different numbers of cells in the design
of the electrical energy source, e.g. battery stack or variety of power requirement by each vehicle. As
a consequence, many system or component designs of a voltage class B electric circuit are currently
related to one specific working voltage. When a maximum working voltage is selected for the design,
often only one supplier for a component is available. Hence, a change to another component supplier or
a change of the dedicated maximum working voltage is not possible, when the system design is finished.
It is necessary to reduce the variety of maximum working voltages in order to
— lower the component and system costs by limiting the variety of maximum working voltages,
— decouple the system or component designs of a voltage class B electric circuit from the design of the
electric energy source,
— enable an exchange of components from different suppliers during and after the system development
and to enable competition and access to the worldwide market for component suppliers, and
— support the system design by specifying basic voltage sub-classes for automotive propulsion
systems within voltage class B.
This PAS lists only those RESS and electric propulsion system voltage sub-classes which are used or
will be used in current or planned vehicle models and for which electronic parts, e.g. semiconductor
switches, are currently available without any restrictions on the market.
The range of voltage class B is too wide to be used for a component design referring to voltage.
Therefore, this PAS divides voltage class B in a set of voltages sub-classes, which enable a component
design referring to voltage for each voltage sub-class.
This specification is not intended to restrict the development of component performance or technology.
It does not exclude the use of other maximum operating voltages for an individual system design.
© ISO 2016 – All rights reserved PROOF/ÉPREUVE v
---------------------- Page: 5 ----------------------
PUBLICLY AVAILABLE SPECIFICATION ISO/PAS 19295:2016(E)
Electrically propelled road vehicles — Specification of
voltage sub-classes for voltage class B
1 Scope
This PAS provides specification of voltage sub-classes for electric propulsion systems and conductively
connected auxiliary electric systems of electrically propelled road vehicles.
The voltage sub-classes are related to d.c. electric circuits.
It applies only to electric circuits and components with maximum working voltages according to voltage
class B.
This PAS provides specifications of characteristics which are relevant for design and operation of
components and systems for the standardized voltage sub-classes.
It enables vehicle manufacturers and supply industry to evaluate the characteristics of components or
systems for their specific vehicle applications.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
component operating status
describes the general functional behaviour of components which depend directly on the voltage in
voltage class B electric circuits
2.2
customer
party that is interested in using voltage class B component or system
2.3
DUT
device under test
2.4
electric circuit
entire set of interconnected live parts through which electrical current is designed to flow under
normal operating conditions
2.5
electric propulsion system maximum working voltage
highest value of d.c. voltage that can occur in an electric propulsion system under any normal operating
conditions according to the customer’s specifications, disregarding transients
2.6
maximum working voltage
highest value of a.c. voltage (rms) or of d.c. voltage that can occur in an electric system under any normal
operating condition according to the customer’s specifications, disregarding transients
Note 1 to entry: In this definition taken from ISO 6469-3, transients include ripple.
© ISO 2016 – All rights reserved PROOF/ÉPREUVE 1
---------------------- Page: 6 ----------------------
ISO/PAS 19295:2016(E)
2.7
rechargeable energy storage system
RESS
system that stores energy for delivery of electric power and which is rechargeable
EXAMPLE Batteries, capacitors, etc.
2.8
ripple
set of unwanted periodic deviations with respect to the average value of the measured or supplied
quantity, occurring at frequencies which can be related to that of components within a system
2.9
supplier
party that provides voltage class B component or system
2.10
transient
pertaining to or designating a phenomenon or a quantity which varies between two consecutive steady
states during a time interval short compared with the time-scale of interest
2.11
voltage class B
classification of an electric component or circuit with a maximum working voltage between 30 V a.c.
(rms) and 1 000 V a.c. (rms) or between 60 V d.c. and 1 500 V d.c
Note 1 to entry: Values for voltage class B are taken from ISO 6469-3.
2.12
upper voltage limit
maximum voltage of a voltage class B sub-class
Note 1 to entry: Maximum working voltages within a voltage sub-class are less than or equal to the voltage limit.
2.13
voltage range
general term covering voltage sub-class, working voltages and deviations from working voltages
2.14
voltage sub-class
classification of an electric component or circuit with a d.c. voltage within the voltage class B
2.15
working voltage
a.c. voltage (rms) or d.c. voltage that can occur in an electric system under normal operating conditions
according to the customer’s specifications,
...
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