Evaluation of Full Vehicle Thermal Propagation Test Methods
Submission to IWG for GTR 20October 2021 –IWG #22
Scope
• Develop test procedure for full vehicle thermal propagation using rapid heater and nail penetration methodologies.
• NRC TRIM rapid heater• ISO 6469-1 nail penetration
• Evaluate test methods on various battery pack technologies.
• Chevrolet Bolt, Nissan Leaf, Tesla Model 3
Chevrolet Bolt Pack Thermal Propagation
• Experimental test to confirm lab operation of TRIM system
• Candidate cell criteria:• Accessibility• Ability to replicate with nail pen
TRIM
Note: DUT test condition not indicative of full vehicle configuration
Nissan Leaf Pack Thermal Propagation
• Experimental test to confirm lab operation of TRIM system
• Candidate cell criteria:• Accessibility• Ability to replicate with nail pen TRIM
Note: DUT test condition not indicative of full vehicle configuration
Next Steps
• Confirmed operation of TRIM system• Initial tests planned for late Fall 2021
• Rapid heater method to be conducted first, with nail penetration to follow.
Open Roof Test Facility – 21m x 18m
Preliminary Data From Initial Test (1 of 3)
• MY 2019 Chevrolet Bolt• Vehicle OFF during test• Wheels and tires removed for test• Heater ramp to 700°C over 10 seconds
• Heater powered off 12 seconds after time zero
• Outdoor Ambient Conditions• Temperature: 16°C• Wind: 4.5 m/s from the SW
Preliminary Data From Initial Test (3 of 3)
15
17
19
21
23
25
27
29
31
33
35
0 50 100 150 200 250 300
Tem
pera
ture
(°C)
Time (s)
Occupant Compartment Temperature
Front Rear
0
100
200
300
400
500
600
700
800
900
1000
0 50 100 150 200 250 300
Tem
pera
ture
(°C)
Time (s)
Battery Thermocouples
TC 01 TC 05 TC 09 TC 13 TC 15 TC 19 Heater