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13
ENERGIZER
BATTERY
MANUFACTURING
VERSION
1.2
Figure
11:
Overview
of
Different
Air
Management
Techniques
high
low
continuous
intermittent
none
or
small
degree
of
air
management
needed,
since
cell
capacity
is
quickly
used
(1
‐
3
months)
high
degree
of
air
management
needed,
cell
has
high
air
access
but
is
expected
to
be
in
service
with
long
periods
of
“off”
time
(>3
months)
Duty
Cycle
Di
sc
h
ar
ge
Rate
throttling
needed
to
maximize
service
time
(>3
months)
3.2
‐‐
Elements
of
Air
Management
Two
elements
of
a
successful
in
‐
device
air
management
system
are
a
means
for
allowing
controlled
air
access
to
the
battery
and
an
air
plenum
for
even
air
distribution.
An
air
plenum
is
an
air
gap,
or
volume,
which
has
access
to
all
of
the
air
holes
on
the
battery.
The
air
plenum
allows
for
more
even
air
distribution
over
the
battery
air
holes,
and
it
provides
a
reserve
of
air
immediately
available
to
the
battery
to
handle
peak
power
needs.
Controlling
air
access
to
the
battery
is
accomplished
by
creating
an
access
path
to
the
sealed
volume
of
air
within
a
device.
The
air
access
path
is
designed
to
allow
a
desired
amount
of
air
to
flow
to
the
sealed
volume
of
air,
which
includes
the
plenum,
either
continuously
or
intermittently.
A
sealed
volume
of
air
can
be
created
by
sealing
an
entire
device,
a
portion
of
the
device
including
the
battery
compartment,
or
just
a
plenum
above
the
air
hole
side
of
the
battery.
The
power
requirements
of
the
device
determine
the
rate
at
which
air
is
required
to
flow
to
the
battery.
Figure
12
illustrates
a
simple,
cost
effective
air
management
solution
designed
into
a
device.
The
compartment
door
contains
an
o
‐
ring
which
seals
against
the
air
hole
side
of
the
battery
when
the
door
is
closed.
The
air
plenum
volume
is
defined
by
the
compartment
door
and
the
sides
of
the
o
‐
ring.
A
slide
switch
is
located
in
the
compartment
door
to
create
an
air
access
point.
The
slide
switch
acts
as
a
valve
which
seals
the
compartment
when
in
the
closed
position
and
allows
air
to
flow
to
the
battery
when
in
the
open
position.
The
slide
switch
could
be
mechanically
manipulated
by
the
user
or
electronically
controlled
by
the
device.
