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 (2 of 3)

60 s 120 s 180 s 240 s 300 s

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