Automotive Engineering - March 2023 - BET14
Battery Management Systems
Global: Temperature (degC)
4.1
4.2
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4
2.5
2.6
2.7
2.8
2.9
3
20000
Time (S)
40000
2.02
2.01
2
1.99
1.98
1.97
1.96
1.95
1.94
1.93
1.92
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
1000
2000
Model Temperature
Experiment_20degC
3000
Figure 3. Simulated and experimental data during external short-circuit testing. (Image: Exicom)
resistance. The COMSOL®
software's
lumped approach-based thermal model
was validated against experimental data
for charge-discharge profiles of the cell.
They also developed:
* Cyclic and calendric capacity-fade models
for cylindrical cells based on the
optimization features available in
COMSOL®
* A high-fidelity pseudo two-dimensional
(P2D) model for cylindrical cells using
extracted electrochemical parameters
They found that the lumped approach
enabled them to construct models using
a minimal number of parameters - such
as cell geometry, electrode thickness,
thermal conductivity, heat capacity, drive
cycle, and open-circuit voltage (OCV)-SOC
table - that are readily available from
battery pack manufacturers.
Extracting these parameters experimentally
is not only a time-consuming
process but also prone to errors due to
variable experimental conditions. For example,
ambient temperature fluctuates,
so extracting an accurate heat profile of a
cell requires performing an extensive
series of tests at different ambient
temperatures.
Using simulation, however, Dr. Singh
and the team were able to perform these
experiments with great ease. They were
×10-11
Cathode
External magnetic field
Applied current density
10.0
Magnetic field response_ at epsl_neg = 0.12
Magnetic field response_ at epsl_neg = 0.36
9.0
Separator
8.0
Anode
7.0
6.0
5.0
z
y
x
4.0
500
100
Time (s)
1500
Battery polarization at epsl_neg = 0.36
Battery polarization at epsl_neg = 0.12
0.52
0.47
0.42
0.37
0.32
0.27
0.22
0.17
0.12
2000
able to efficiently study charge and discharge
profiles, thermal behavior at different
charge and discharge rates, and
thermal runaway (Figure 2) due to external
or internal short circuits for different
cell chemistries (Figure 3).
The team was also able to identify
the hotspots in the battery pack and
determine the cell grading based on
capacity fade analysis with high accuracy.
These results had direct applications
in reducing the development cycle
time of the BMS, as the hotspots indicated
the best positions for deploying
the thermal sensors within the BMS to
function most efficiently.
3D-designed cell geometry (left). Variation of magnetic field response and polarization behavior during discharging at 0.12 and 0.36 anode
porosity values (right). (Image: Exicom)
14
Battery & Electrification Technology, March 2023
Cell potential (V)
Magnetic field response (A/m)
Battery polarization (V)
Automotive Engineering - March 2023
Table of Contents for the Digital Edition of Automotive Engineering - March 2023
Automotive Engineering - March 2023 - INTRO1
Automotive Engineering - March 2023 - SPONSOR1
Automotive Engineering - March 2023 - CVR1
Automotive Engineering - March 2023 - CVR2
Automotive Engineering - March 2023 - 1
Automotive Engineering - March 2023 - 2
Automotive Engineering - March 2023 - 3
Automotive Engineering - March 2023 - 3A
Automotive Engineering - March 2023 - 3B
Automotive Engineering - March 2023 - 4
Automotive Engineering - March 2023 - 5
Automotive Engineering - March 2023 - 6
Automotive Engineering - March 2023 - 7
Automotive Engineering - March 2023 - 8
Automotive Engineering - March 2023 - 9
Automotive Engineering - March 2023 - 10
Automotive Engineering - March 2023 - 11
Automotive Engineering - March 2023 - 12
Automotive Engineering - March 2023 - 13
Automotive Engineering - March 2023 - 14
Automotive Engineering - March 2023 - 15
Automotive Engineering - March 2023 - 16
Automotive Engineering - March 2023 - 17
Automotive Engineering - March 2023 - 18
Automotive Engineering - March 2023 - 19
Automotive Engineering - March 2023 - 20
Automotive Engineering - March 2023 - 21
Automotive Engineering - March 2023 - 22
Automotive Engineering - March 2023 - 23
Automotive Engineering - March 2023 - 24
Automotive Engineering - March 2023 - 25
Automotive Engineering - March 2023 - 26
Automotive Engineering - March 2023 - 27
Automotive Engineering - March 2023 - 28
Automotive Engineering - March 2023 - 29
Automotive Engineering - March 2023 - 30
Automotive Engineering - March 2023 - 31
Automotive Engineering - March 2023 - 32
Automotive Engineering - March 2023 - 33
Automotive Engineering - March 2023 - CVR4
Automotive Engineering - March 2023 - BETCVRA
Automotive Engineering - March 2023 - BETCVRB
Automotive Engineering - March 2023 - BETCVR1
Automotive Engineering - March 2023 - BETCVR2
Automotive Engineering - March 2023 - BET1
Automotive Engineering - March 2023 - BET2
Automotive Engineering - March 2023 - BET3
Automotive Engineering - March 2023 - BET4
Automotive Engineering - March 2023 - BET5
Automotive Engineering - March 2023 - BET6
Automotive Engineering - March 2023 - BET7
Automotive Engineering - March 2023 - BET8
Automotive Engineering - March 2023 - BET9
Automotive Engineering - March 2023 - BET10
Automotive Engineering - March 2023 - BET11
Automotive Engineering - March 2023 - BET12
Automotive Engineering - March 2023 - BET13
Automotive Engineering - March 2023 - BET14
Automotive Engineering - March 2023 - BET15
Automotive Engineering - March 2023 - BET16
Automotive Engineering - March 2023 - BET17
Automotive Engineering - March 2023 - BET18
Automotive Engineering - March 2023 - BET19
Automotive Engineering - March 2023 - BET20
Automotive Engineering - March 2023 - BET21
Automotive Engineering - March 2023 - BET22
Automotive Engineering - March 2023 - BET23
Automotive Engineering - March 2023 - BET24
Automotive Engineering - March 2023 - BET25
Automotive Engineering - March 2023 - BET26
Automotive Engineering - March 2023 - BET27
Automotive Engineering - March 2023 - BET28
Automotive Engineering - March 2023 - BET29
Automotive Engineering - March 2023 - BET30
Automotive Engineering - March 2023 - BET31
Automotive Engineering - March 2023 - BET32
Automotive Engineering - March 2023 - BET33
Automotive Engineering - March 2023 - BET34
Automotive Engineering - March 2023 - BETCVR3
Automotive Engineering - March 2023 - BETCVR4
https://www.nxtbook.com/smg/sae/24AE08
https://www.nxtbook.com/smg/sae/24AE06
https://www.nxtbook.com/smg/sae/24AE05
https://www.nxtbook.com/smg/sae/24AE04
https://www.nxtbook.com/smg/sae/24AE03
https://www.nxtbook.com/smg/sae/24AE02
https://www.nxtbook.com/smg/sae/23AE12
https://www.nxtbook.com/smg/sae/23AAVE11
https://www.nxtbook.com/smg/sae/23AE10
https://www.nxtbook.com/smg/sae/23AE09
https://www.nxtbook.com/smg/sae/23AE08
https://www.nxtbook.com/smg/sae/23AAVE07
https://www.nxtbook.com/smg/sae/23AE06
https://www.nxtbook.com/smg/sae/23AE05
https://www.nxtbook.com/smg/sae/23AAVE04
https://www.nxtbook.com/smg/sae/23AE04
https://www.nxtbook.com/smg/sae/23AE03
https://www.nxtbook.com/smg/sae/23AE02
https://www.nxtbook.com/smg/sae/23AAVE01
https://www.nxtbook.com/smg/sae/22AE12
https://www.nxtbook.com/smg/sae/22AVE11
https://www.nxtbook.com/smg/sae/22AE10
https://www.nxtbook.com/smg/sae/22AE09
https://www.nxtbook.com/smg/sae/22AE08
https://www.nxtbook.com/smg/sae/22AVE07
https://www.nxtbook.com/smg/sae/22AE06
https://www.nxtbook.com/smg/sae/22AE05
https://www.nxtbook.com/smg/sae/22AVE04
https://www.nxtbook.com/smg/sae/22AE04
https://www.nxtbook.com/smg/sae/22AE03
https://www.nxtbook.com/smg/sae/22AE02
https://www.nxtbook.com/smg/sae/22AVE01
https://www.nxtbook.com/smg/sae/21AE12
https://www.nxtbook.com/smg/sae/21AVE11
https://www.nxtbook.com/smg/sae/21AE10
https://www.nxtbook.com/smg/sae/21AVE09
https://www.nxtbook.com/smg/sae/21AE09
https://www.nxtbook.com/smg/sae/21AE08
https://www.nxtbook.com/smg/sae/21AVE07
https://www.nxtbook.com/smg/sae/21AE06
https://www.nxtbook.com/smg/sae/21AE05
https://www.nxtbook.com/smg/sae/21AVE05
https://www.nxtbook.com/smg/sae/21AE04
https://www.nxtbook.com/smg/sae/21AE03
https://www.nxtbook.com/smg/sae/21AVE03
https://www.nxtbook.com/smg/sae/21AE02
https://www.nxtbookmedia.com