Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
61, С. 104898 - 104898
Опубликована: Авг. 8, 2024
To
safely
utilize
retired
power
lithium-ion
batteries
(PLIBs)
for
secondary,
LiFePO₄/graphite
were
taken
as
research
object.
The
electrochemical-thermal
behaviors
investigated
under
different
operating
conditions.
experimental
results
show
that
heat
generated
will
greatly
increase,
and
the
uneven
distribution
of
temperature
within
battery
become
more
severe
during
high-temperature
cycles.
Compared
with
room
cycling,
decay
rate
SOH
increased
by
419.88
%
after
400
cycles
at
environment.
After
25
°C
55
°C,
maximum
difference
3C
from
2.05
to
2.91
2.14
°C–3.03
respectively,
corresponding
increases
41.95
41.59
%.
800
overcharging,
state
health
(SOH)
was
only
67.52
%;
compared
normal
cycles,
156.25
Finally,
a
method
assessing
battery's
status
based
on
frequency
peak
area
in
probability
density
function
(PDF)
proposed.
These
proved
effectiveness
proposed
evaluating
PLIBs.
Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
59, С. 104585 - 104585
Опубликована: Май 21, 2024
This
study
introduces
an
innovative
thermal
management
system
tailored
for
cylindrical
Lithium-ion
batteries.
It
integrates
a
tubular
thermoelectric
generator
(TTEG)
to
handle
both
battery
and
the
utilization
of
waste
heat
power
generation.
The
main
focus
lies
in
evaluating
recovery
capabilities
TTEG
enhance
effective
management.
research
investigates
key
geometric
operational
parameters
such
as
discharge
rate
(C-rate),
thermocouple
count
(NTC),
transfer
coefficient
(HTC),
leg
height
(HL)
comprehensively
assess
overall
performance.
results
highlight
that
integrating
improves
lithium-ion
demonstrates
temperature
reductions
up
21
°C
at
3C
compared
batteries
without
system.
Additionally,
increasing
NTC
leads
rise
maximum
temperature,
thereby
enhancing
For
instance,
number
thermocouples
from
100
144
substantial
70%
increase
voltage.Furthermore,
HTC
HL
positively
impacts
performance,
showing
significant
decrease
temperature.
Elevated
also
contribute
improving
voltage,
power,
conversion
efficiency,
highlighting
their
dual
role
recovery.
peak
conditions,
there
is
notable
reduction
2.66°C
with
12
mm
4
mm.
10
20,
particularly
discharge,
surge
15.87%
voltage
34.28%
output
power.
Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
60, С. 104667 - 104667
Опубликована: Июнь 6, 2024
Thermal
management
remains
a
pivotal
challenge
in
enhancing
the
safety
and
efficiency
of
lithium-ion
batteries,
especially
under
conditions
prone
to
thermal
runaway.
This
study
investigates
performance
dual
nano-enhanced
phase
change
materials
(NEPCM)
moderating
extreme
events
battery
cells.
By
integrating
nanoparticles,
specifically
alumina
single-walled
carbon
nanotubes
(SWCNT),
into
(PCM),
explores
modifications
behavior
dynamics
within
cylindrical
enclosure.
The
research
focuses
on
comparing
pure
PCM
NEPCM,
using
two
types
nanoparticles
dispersed
matrix
at
various
volume
fractions.
findings
indicate
that
NEPCM
significantly
improves
heat
transfer
rates
accelerates
melting
process.
Specifically,
with
6%
SWCNT
increases
temperature
distribution
by
up
15.27%
compared
setups
enhances
liquid
fraction
66.54%
similar
conditions.
inclusion
demonstrates
superior
enhancement
conductivity
alumina,
leading
more
effective
absorption
dissipation.
Liquid
analysis
confirms
configurations
facilitate
quicker
uniform
behaviors,
near
source.
PCM1,
positioned
adjacent
battery,
exhibits
an
immediate
increase
rate,
outperforming
PCM2
regulation.
underscores
potential
improving
particularly
scenarios
risk
optimizing
formulation
robust
solution
is
presented
control
spikes
improve
durability
challenging
operational
environments.
Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
60, С. 104837 - 104837
Опубликована: Июль 14, 2024
In
this
study,
we
compared
the
performance
of
different
structures
mini-channel
cold
plate
(MCP)
-
phase
change
material
(PCM)
hybrid
thermal
management
on
discharge
and
runaway.
The
heat
transfer
for
them
can
be
categorized
into
three
types:
(a)
uncoupled,
(b)
semi-coupled,
(c)
fully
coupled.
Among
these,
semi-coupled
design
B
exhibits
best
performance.
Specifically,
in
high
rate
condition,
structure
control
battery
temperature
at
44.37
°C
low
coolant
mass
flow
rate,
36.47
while
difference
(TD)
a
single
cell
does
not
exceed
2.01
°C.
low-multiplier
zero-energy
system,
pack
rise
limited
to
no
more
than
10
35
environment.
Under
external
short-circuit
conditions,
lower
is
sufficient
keep
43.22
internal
runaway
(TR),
prolong
TR
adjacent
up
521
s,
higher
completely
inhibit
occurrence
TR.
objective
study
offer
valuable
references
implementation
MCP-PCM
cooling
systems.
