Fuel cell technologies - Part 6-400: Micro fuel cell power systems - Power and data interchangeability

IEC 62282-6-400:2019 covers the interchangeability of power and data between micro fuel cell power systems and electronic devices to provide the micro fuel cell power system compatibility for a variety of electronic devices while maintaining the safety and performance of the micro fuel cell system. For that purpose, this document covers power interfaces and their connector configuration. The power management circuitry and power sharing methodology are also provided.
This document also covers the data communication protocol and its data specification. Operation modes and alert conditions are also provided for the means to comply with the power control requirements of the electronic device.

Technologies des piles à combustible - Partie 6-400: Systèmes à micropiles à combustible - Interchangeabilité de la puissance et des données

l’IEC 62282-6-400:2019 traite de l’interchangeabilité de la puissance et des données entre les systèmes à micropiles à combustible et les dispositifs électroniques pour assurer la compatibilité du système à micropiles à combustible pour différents dispositifs électroniques tout en maintenant la sécurité et les performances de ce système. À cet effet, le présent document couvre les interfaces de puissance et la configuration de leur connecteur. Les circuits de gestion d’énergie et la méthode de partage d’énergie sont également spécifiés.
Le présent document traite également du protocole de communication de données et de sa spécification de données. Des modes de fonctionnement et des alertes sont également prévus pour permettre aux moyens de se conformer aux exigences de contrôle de puissance du dispositif électronique.

General Information

Status
Published
Publication Date
21-May-2019
Current Stage
PPUB - Publication issued
Completion Date
22-May-2019
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IEC 62282-6-400
Edition 1.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fuel cell technologies –
Part 6-400: Micro fuel cell power systems – Power and data interchangeability
Technologies des piles à combustible –
Partie 6-400: Systèmes à micropiles à combustible – Interchangeabilité de la
puissance et des données
IEC 62282-6-400:2019-05(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62282-6-400
Edition 1.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fuel cell technologies –
Part 6-400: Micro fuel cell power systems – Power and data interchangeability
Technologies des piles à combustible –
Partie 6-400: Systèmes à micropiles à combustible – Interchangeabilité de la
puissance et des données
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.070 ISBN 978-2-8322-6762-2

Warning! Make sure that you obtained this publication from an authorized distributor.

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® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 62282-6-400:2019 © IEC 2019
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 6

3 Terms, definitions and abbreviated terms ........................................................................ 6

3.1 Terms and definitions .............................................................................................. 6

3.2 Abbreviated terms ................................................................................................... 6

4 Power interface ............................................................................................................... 7

4.1 Configuration of micro fuel cell power system ......................................................... 7

4.2 Type of power hybridization .................................................................................... 8

4.2.1 General ........................................................................................................... 8

4.2.2 Micro fuel cell power system with internal battery ............................................ 8

4.2.3 Micro fuel cell power system without internal battery ....................................... 9

4.3 Type of power connector ......................................................................................... 9

4.3.1 Micro fuel cell power system as battery replacement ....................................... 9

4.3.2 Micro fuel cell power system as external power source .................................. 11

5 Data interface ................................................................................................................ 12

5.1 General ................................................................................................................. 12

5.2 Data communication protocol ................................................................................ 13

5.3 Data specification ................................................................................................. 13

5.4 Modes of operation of the micro fuel cell power system ........................................ 13

5.4.1 General ......................................................................................................... 13

5.4.2 Power-OFF mode .......................................................................................... 14

5.4.3 Battery mode ................................................................................................. 14

5.4.4 Start-up mode ................................................................................................ 14

5.4.5 Idle mode ...................................................................................................... 14

5.4.6 Power-ON mode ............................................................................................ 14

5.4.7 Hybrid mode .................................................................................................. 15

5.5 Alert specification ................................................................................................. 15

Bibliography .......................................................................................................................... 16

Figure 1 – Micro fuel cell power system and micro fuel cell power unit block diagram ............. 5

Figure 2 – Micro fuel cell power system configuration ............................................................. 8

Figure 3 – Power hybridization of micro fuel cell power system with internal battery ............... 9

Figure 4 – Power hybridization of micro fuel cell power system without internal battery ........... 9

Figure 5 – Schematic diagram of power connection in the case of battery replacement ......... 10

Figure 6 – Power connector of micro fuel cell power system as battery replacement ............. 10

Figure 7 – Schematic diagram of power connection in the case of external power

source .................................................................................................................................. 11

Figure 8 – Power connector of micro fuel cell power system as AC adapter .......................... 12

Figure 9 – Modes of operation diagram for micro fuel cell power system ............................... 14

Table 1 – Abbreviated terms ................................................................................................... 7

Table 2 – Potential data functions for use with micro fuel cell power system ......................... 13

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IEC 62282-6-400:2019 © IEC 2019 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FUEL CELL TECHNOLOGIES –
Part 6-400: Micro fuel cell power systems –
Power and data interchangeability
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

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Publication(s)"). Their preparation is entrusted to technical committees; any IEC National Committee interested

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governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62282-6-400 has been prepared by IEC technical committee 105:

Fuel cell technologies.
The text of this International Standard is based on the following documents:
FDIS Report on voting
105/721/FDIS 105/724/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts in the IEC 62282 series, published under the general title Full cell

technologies, can be found on the IEC website.
---------------------- Page: 5 ----------------------
– 4 – IEC 62282-6-400:2019 © IEC 2019

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
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IEC 62282-6-400:2019 © IEC 2019 – 5 –
FUEL CELL TECHNOLOGIES –
Part 6-400: Micro fuel cell power systems –
Power and data interchangeability
1 Scope

This part of IEC 62282 covers the interchangeability of power and data between micro fuel

cell power systems and electronic devices to provide the micro fuel cell power system

compatibility for a variety of electronic devices while maintaining the safety and performance

of the micro fuel cell system. For that purpose, this document covers power interfaces and

their connector configuration. The power management circuitry and power sharing
methodology are also provided.

This document also covers the data communication protocol and its data specification.

Operation modes and alert conditions are also provided for the means to comply with the

power control requirements of the electronic device.

A micro fuel cell power system and micro fuel cell power unit block diagram is shown in

Figure 1. Micro fuel cell power systems and micro fuel cell power units are defined as devices

that are wearable or easily carried by hand, providing DC outputs that do not exceed 60 V DC

and power outputs that do not exceed 240 VA. This document covers the power and data

interfaces between the micro fuel cell power unit and electronic device.

Figure 1 – Micro fuel cell power system and micro fuel cell power unit block diagram

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– 6 – IEC 62282-6-400:2019 © IEC 2019
2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements of this document. For dated references, only the edition

cited applies. For undated references, the latest edition of the referenced document (including

any amendments) applies.
IEC TS 62282-1, Fuel cell technologies – Part 1: Terminology
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC TS 62282-1 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
stand-alone micro fuel cell power system

micro fuel cell power system intended to provide power to an electronic device by way of a

cable or other external connection
3.1.2
semi-integrated micro fuel cell power system

micro fuel cell power system intended to be removably installed in an electronic device, for

example in a battery port

Note 1 to entry: This type of micro fuel cell power system may be directly connected to the electronic device, and

may have a volume externally protruding from the electronic device.
3.1.3
integrated micro fuel cell power system

micro fuel cell power system that is permanently installed within an electronic device, either at

the time of manufacture, or as an aftermarket feature

Note 1 to entry: This type of micro fuel cell power system may have a permanently installed, refillable internal

reservoir for storage of fuel, or it may have a removable cartridge for storage of fuel.

3.1.4
electronic device

device such as cellular phone, music player, digital camera, camcorder, personal digital

assistant (smartphone, laptop, tablet), mobile game machine or mobile PC, that uses a micro

fuel cell power unit/system
3.1.5
micro fuel cell charger
charger that uses a micro fuel cell power unit/system
3.2 Abbreviated terms
The abbreviated terms are given in Table 1.
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IEC 62282-6-400:2019 © IEC 2019 – 7 –
Table 1 – Abbreviated terms
Abbreviated term Definition
BMS Battery management system
FMS Fuel cell management system
BOP Balance of plant
CAN Controller area network
EPS External power supply
MFC Micro fuel cell
PDA Personal digital assistant
SBDS Smart battery data specification
SMBC Server message block clock
SMBD Server message block data
SOC State of charge
4 Power interface
4.1 Configuration of micro fuel cell power system

Electronic devices such as notebook PCs and cellular phones generally have four options

available for sourcing power to operate the device:

a) AC adapter port: sources relatively high current, but generally does not enable any data

communication functions;

b) DC adapter port: sources relatively high current, but generally does not enable any data

communication functions;

c) battery port: sources current in the main battery port, or in the auxiliary battery port

(optional), and can provide data communication functions in addition to facilitating

provision of electricity to the device;

d) USB port: sources relatively low current, and generally provides data communication

functions in addition to facilitating provision of electricity to or from the device.

NOTE There is no option for power to be fed in through the serial or parallel ports of any presently known

electronic devices.
Consequently, there are three general types of configuration for power and data

communication between a micro fuel cell power system and an electronic device, as shown in

Figure 2, contemplated in this document:

1) stand-alone micro fuel cell power system: connected to the electronic device by way of an

external connection, such as a cord or connection interface; can function in a similar

manner as an AC adaptor, or must provide power (and/or data) by way of the USB port;

2) semi-integrated micro fuel cell power system: can operate in cooperation with a main

battery, or with an auxiliary battery in an electronic device, or can function as a removable

battery replacement;

3) integrated micro fuel cell power system: a micro fuel cell power system that is

permanently installed in an electronic device. This type of micro fuel cell power system is

outside of the scope of this document.
---------------------- Page: 9 ----------------------
– 8 – IEC 62282-6-400:2019 © IEC 2019
Figure 2 – Micro fuel cell power system configuration
4.2 Type of power hybridization
4.2.1 General

Subclause 4.2 applies only to the hybridization of micro fuel cell power systems and does not

apply to micro fuel cell power systems that are not hybridized.
4.2.2 Micro fuel cell power system with internal battery

In this case, the micro fuel cell power system utilizes an internal battery within its enclosure.

The micro fuel cell power system can operate as a stand-alone power generator or as an

independent power source. For start-up, the internal battery shall be rated for the power

required to start the micro fuel cell power system. If the internal battery is discharged, the

micro fuel cell power system will prevent start-up until the internal battery is recharged or

sufficient power is provided by an external source.

There are two methods to acquire the start-up power for the micro fuel cell power system:

a) an external charging port inside a compartment within the micro fuel cell power system.

The external charging port can be used to charge the internal battery as well as provide

power to start the micro fuel cell;

b) the required start-up power can be directly obtained from the internal battery; when

dependent on the internal battery for start-up, the MFC power system shall monitor the

battery SOC.
Four types of internal battery power configurations are shown in Figure 3.
---------------------- Page: 10 ----------------------
IEC 62282-6-400:2019 © IEC 2019 – 9 –

Figure 3 – Power hybridization of micro fuel cell power system with internal battery

4.2.3 Micro fuel cell power system without internal battery

Subclause 4.2.3 does not apply to micro fuel cell power systems where the input of any

external power for start-up is not necessarily required, even without an internal battery as

mentioned in 4.3.2.

A micro fuel cell power system may be connected to the electronic device for start-up

purposes. If the micro fuel cell power system requires the input of external power for start-up,

it shall draw power for start-up from the electronic device. In such a case, the micro fuel cell

power system can monitor the available power and can prevent start-up if sufficient power is

not available.
Two types of external battery power configurations are shown in Figure 4.

Figure 4 – Power hybridization of micro fuel cell power system without internal battery

4.3 Type of power connector
4.3.1 Micro fuel cell power system as battery replacement

A micro fuel cell power system is designed to have the same power connector configuration

as a power connector in a battery system in electronic devices. The power manager in

electronic devices can control power from three sources: an internal battery, an AC adaptor,

and a micro fuel cell power system. The micro fuel cell power system can be mounted

internally in the electronic devices or as an external system, but should include the power

interface characteristics of a battery, such as the BMS.

An example of a block diagram between a micro fuel cell power system and electronic devices

is described in Figure 5.
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– 10 – IEC 62282-6-400:2019 © IEC 2019

Figure 5 – Schematic diagram of power connection in the case of battery replacement

The fuel cell stack consists of multiple cells and the output voltage will vary with fuel flow, air

flow and its operating temperature. The BOP consists of fuel pumps, fans, air compressors,

sensors and other components needed to operate the fuel cell stack. The battery is used to

power the BOP components during start-up and is recharged by the micro fuel cell power

system after reaching operational conditions. The fuel cell controller manages the fuel and air

to the stack through the BOP control circuit and protects the fuel cell stack by limiting the load

so that the maximum fuel cell power limit is not exceeded. The fuel cell stack temperature is

recorded by the temperature signals. The DC/DC converter is designed to maintain a constant

power output when the current or voltage of the fuel cell stack is changed. The fuel cartridge

can include memory components that act as a measurement of the fuel gauge level so that

the fuel cell controller knows the fuel level in the cartridge. In this case, the power connector

between the micro fuel cell power system and electronic device shall be designed with a

battery connector as shown in Figure 6.

Figure 6 – Power connector of micro fuel cell power system as battery replacement

With regard to data communication between the micro fuel cell power system and electronic

devices, the fuel cell controller is designed to have a communication port and data protocols.

The details of the data interface are given in Clause 5.
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IEC 62282-6-400:2019 © IEC 2019 – 11 –
4.3.2 Micro fuel cell power system as external power source

The micro fuel cell power system is externally coupled to the electronic device through a DC

power input port. The power manager in electronic devices can control power from three

sources: an internal battery, an AC adaptor, and a micro fuel cell power system. Generally a

DC input is intended to supply power for the system load in an electronic device and charge

the battery with the rest of the available power. However, a micro fuel cell power system shall

not have enough power for the system load and for charging the battery. Therefore, the power

requirements in electronic devices should be limited until the external power source is

specified. The way to identify an external power source should be included in the power

connector. An example of a block diagram between the micro fuel cell power system and

electronic devices is described in Figure 7.

Figure 7 – Schematic diagram of power connection in the case of external power source

The power monitoring compartment is designed in the electronic device to control the

charging requirement for the battery according to the external power source. In this case, the

battery inside the electronic device or the battery inside the micro fuel cell power system is

used to power the BOP components during start-up and is recharged by the micro fuel cell

power system after reaching operational conditions. When the battery inside the micro fuel

cell power system has reached its lower limit of capacity, the power required for fuel cell start-

up should only be transferred from the battery inside the electronic device. In this case, the

power connector between the micro fuel cell power system and the electronic device should

be designed with the power source identification function, as shown in Figure 8.
---------------------- Page: 13 ----------------------
– 12 – IEC 62282-6-400:2019 © IEC 2019
Key
P+ power
P– ground

Serial communication: UART (Universal Asynchronous Receiver Transmitter, I2C, SPI, etc.)

Figure 8 – Power connector of micro fuel cell power system as AC adapter

With regard to data communication between the micro fuel cell power system and electronic

devices, the fuel cell controller can be designed to communicate through digital or analog

signal wire. The details of the data protocol and its specification are given in Clause 5.

5 Data interface
5.1 General

The micro fuel cell power system generally has a number of differences compared to the

traditional battery in electronic devices. The micro fuel cell power system can be turned on

and off and has a start-up time during which it might not produce power or might produce only

a limited amount of power. The micro fuel cell power system also has maximum power

limitation and is refueled instead of recharged. According to these characteristics, new

functions should be added to the communication protocol and
...

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