G-LIEV Electric, Long Range, Hybrid Vehicles Part 3

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Questions and Answers

What should firefighters do when dealing with a high voltage battery fire?

Use gas monitors to detect hazardous atmospheres

Apply water continuously to cool the exterior of the battery (correct)

Enter the vapour cloud to assess the situation

Attempt to cut open the battery pack to gain access

What may occur when a battery is in thermal runaway or off-gassing?

The battery's voltage decreases

A harmless smoke venting from the battery

The battery's electricity is safely dissipated

A hazardous atmosphere is created (correct)

What should incident commanders consider when performing extrication procedures?

The color of the vehicle

The weight of the vehicle

The risk of fire from the high voltage battery

The damage to the battery module (correct)

What should be in place during extrication procedures?

Staffed, charged hose lines Signup and view all the answers

What should NOT be done during extrication procedures?

Piercing the battery case Signup and view all the answers

Why should firefighters stay out of the vapour cloud?

To avoid inhaling hazardous gases Signup and view all the answers

What may occur when a battery is fully discharged?

It may re-ignite Signup and view all the answers

In areas with inadequate water sources, what may be a viable alternative to suppression?

Allowing the batteries to completely burn out Signup and view all the answers

What should you remove to verify what is being cut before making a cut?

trim Signup and view all the answers

Why should you avoid cutting orange coloured cables?

They are high-voltage cables Signup and view all the answers

What should you try to break first in a rescue operation?

glass and polycarbonate materials Signup and view all the answers

What can happen if an EV is on its side and not stabilized?

It will roll unexpectedly Signup and view all the answers

Why is ventilation a priority in firefighting operations in parking facilities?

To provide an adequate air change rate to limit toxic and flammable gas concentrations Signup and view all the answers

What is a consideration for the Incident Commander in a parking garage configuration?

Protection of exposures Signup and view all the answers

Why do modern vehicles often ignite easier in a parking garage configuration?

Due to the use of polymers and combustible materials in vehicle construction Signup and view all the answers

Who should monitor for toxic and flammable gases during firefighting operations?

Hazmat crews Signup and view all the answers

Study Notes

Cooling and Fire Suppression

After controlling the main battery fire, continuous water application can cool the exterior of the battery to reduce internal cell temperature, decreasing off-gassing and re-ignition risks.

Extinguishing Vehicle Fires

Extinguish unrelated vehicle fires using current TFS SOG's and Training Notes (TN).
Be cautious of thermal runaway, off-gassing, and hazardous atmospheres when dealing with LIBs.

Firefighter Safety

Stay out of vapor clouds and do not rely on gas monitors without considering cross-contamination of gas sensors.
Be prepared for extended suppression operations and overhaul due to potential battery re-ignition.

Extrication Operations

Consider battery module damage when performing extrication procedures.
Have staffed, charged hose lines in place to mitigate delayed fire risks.
Shut down high-voltage systems before starting extrication procedures.
Avoid using holes caused by the crash for rescue struts, and do not pierce, puncture, or create purchase points in the battery case.

Vehicle Structure and Rescue

The battery compartment is part of the vehicle structure; consider this when determining extrication methods.
Remove trim to verify what is being cut before making the cut.
Avoid destroying corner/centre pillars unless absolutely necessary.
If necessary, cut corner pillars (fiberglass) first, then centre pillars (aluminum).

Safety Precautions

Avoid friction and heat when using tools to prevent plastic melting and tool disablement.
Be cautious of sparks and injury from low-voltage lines, especially on the driver-side front "A" pillar.

Vehicle Storage and Fire Fighting in Parking Facilities

Follow G-FFOU – Firefighting Operations in Underground Facilities guidelines.
Prioritize ventilation to limit toxic and flammable gas concentrations in closed or underground carparks.
High-volume, large CFM fans may be necessary for gas removal in enclosed or below-grade areas.
Ensure adequate water supply for extended firefighting operations.
Consider protection of exposures and drainage capacity for extended operations.

Hazmat Response

Monitor for toxic and flammable gases with Hazmat crews.

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