Cooling in a solid polymer fuel cell stack

eformer

Patents

is

:liminates

operational. the

rssociated

with

Applicant:

Ballard

Power

Systems,

4ppLicant:

manifolding

configuration

in

this fuel cell stack simplifies sealing mechanisms associated

the with

the

stack

manifolds,

reactant

streams

between

the separator

resilient passages

MEA seals. may also be adjoining

between surfaces

Patent number:

and

pi thick

region zone

zone

ieposited

plate pairs.

US 6066409

vapour

WO

Applicant:

Applicant:

Degussa,

that

includes

particles

Germany

catalyst finely

is described dispersed

on a powdery,

4n

alloy

electrically

poisoning

when

the

For

particles

have mean

between

0.5 and >2 nm.

Patent number:

alloy

crystallite

Energy

Applicant:

and

sizes

US 6066410

moulding plate

for

or

a PEM

combined

conductive

them

from

with on

walls

The

and

surfaces

prevents

Applicant:

in sub-freezing

of the

start-up,

premature

Canada A method operation which

includes

described. stream which direct

63

During

a fuel

Patent

system

reformer

start-up

in

i>

the fuel

number:

includes ro

the

coolant

of the fuel until

WO

long

th<

for fuel the

that

On

Patent

the

fuel

UK

cooling,

manner,

jressure

drop

iucing

hydrogen

patent number:

the

with

to give a a very

low

for

pro-

suitable

for a fuel cell. WO

001325

13

Here

flow

separator

OOl31814

fuel

the 0,

tc inlel

t

the

Hz !

when

z1

:

two

plate

coextensive shaped

cell

sheet

to promote

of reactant electrodes

together

and form number:

of at metal the

gases to the in the

elements

metal

space between

for a PEM

is constructed

These

Patent

of Gas

USA

a separator

elements

operatior

fuel cell installation, and

gas

may the

Institute

distribution

In this process for reliable

adjacent

or oxidising

WO

a

surface parallel

and

ro

number:

Applicant:

Germany

closed

Matthey,

Sheet metal PEM bipolar plate

US 6068941

is

Johnson

adjacent

whose

cooling

perpendicular

Applicant:

valve

of the stack.

US 6071634

reformer

channels

channels

least

inlet

increases,

thus

00131813

side,

Technology,

closed,

overheating

in

electric

reactant

to raise

off the module

output

Yvithout

available The

Japan

so

of air alcohol

is first

c:urrent

:ompact

fuel cell stack includes coolant

its

plane.

catalyst,

valve

passages.

:ounter-current

or

to improve

separator

Operation of a PEM fuel cell installation

switch

of hydrogen

t he anode

contains fhis reactor vessel .elective oxidation stages and has

from

the size of the

Toshiba,

PEM

rectangular

to the cathode

of a PEM

dosed

in the plate,

This

Fuel

amount

Siemens,

t he amount

Cooling in a solid polymer fuel cell stack

oxidise

number:

a

Patent

00130202,

the cathode to

the

by varying

anode

and added exhaust gas is recirculated t’o the fresh fuel gas, which increases

Removing CO from H,

is introduced

via

system

and/or

Systems,

cell

fuel

The

fuel cell stack

is fed to part of the fuel cells provide output power by oxidation

field

diffusing

commencing

a fuel

plate.

fuel cell’s performance.

environments.

producing heat cell’s temperature.

Power of

of

into

a controlled

is fed through flow

a

by a perforated

area,

fuel cell has methanol fed

carbon

start-up Ballard

channel

holes

filler. WO

0013 18 16

generation

4pplicant:

resin

during shutdown, to passages prevent trapped water from freezing

earth

clogging of the passages. Patent number: WO 00129092

Improved capability

It

WO

1Datent number:

is separated

an adjacent

especially

cell.

carbon

International

or ethanol

coating

an alkaline

the

an

protects

layer that limits

oxide

build-up

have.

which

corrosion.

is overlaid metal

assembly

coating

by in

Forschungszentrum

channel,

collector

Start-up of cold fuel cell Cells, USA Here a PEM

simply,

Germany

Applicant:

Applicant:

be

US 6068943

discharged

00/30203

Fuel

can

impurities

Here the electrode

injection-

uses a metal thin film.

/ lpplicant: BG, UK I n this system hydrogen-richer

from

fuel

and

F‘ower

power

Fuel introduced via perforated plate

a low surface

powder

the

the

Applicant:

polymer

with

a method

which

resulting

in

Patent number:

USA

fuel

a

by

reactor.

compo-

of a current

graphite

carbon in reformers

reformer

>xidising

are described

compression-

highly

International

alumina

avoided

a

plate

process

comprises

Cells, USA The walls of the fuel gas passages in this

a

moulding

Patent numbers:

Inhibiting deposition

safely

includes

Partners,

improved

jition

conductive carrier material. The catalyst is particularly resistant to CO

losses

liilich,

Current collector

alloy

cell

Nrcput mpurities

comprising

00130201

PEM anode catalyst A PtRu

provides

a fuel

1

electron-beam

fuel

Germany

This invention

deposition.

Patent number:

%tent number:

md

Korea

for use in a fuel cell powered

chicle, which

Forschungszeutrum

is preferably

by

Jhysical

SK Corporation,

‘his patent describes a miniature

4pplicant:

: F

resulting power

fuel reformer

IIncreased power density I lulich,

Enterprise

The

NItput.

Applicant:

US 6068942

eformer

1

:atalytically active metal, n significantly improved

Coolant provided

number:

patent

00130200

the electrode-membrane

nterfacial 3-475

non-active

of separator

1

USA membrane-electrode

assembly

directed

plates

Gore

Holdings, this .n

because

are not

start-up.

VIEAs with improved 3ower output

Canada The

WO

rlliniature

0, partial pressure I ,redetermined f i s reached in the cathode region.

typically

reformer

‘Jatent number:

Improved reactant manifolding and sealing

This

delay

a coolant

stack. nestle flow

them. WO

00131815

Fuel Cells

Bulletin

No. 28