Presented to: By: Date: Federal Aviation Administration Passive Fire Protection for Lithium Battery...

Presented to:

By:

Date:

Federal AviationAdministration

Passive Fire Protection for Lithium Battery Shipments

ICAO

FAA Fire Safety

09-11-2014

2Federal AviationAdministration


09-11-14

Results: Over-Pack Box

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Results: Steel Drum

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Results: Density Reduction

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Separation Distance Tests

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State of Charge Two sheets of cardboard (.3” thick)

Three sheets of cardboard (.45” thick)

Five sheets of cardboard (.75” thick)

60%



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Results (Separation Distance)

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•Larger separation distances were not very effective at reducing cell temperatures.

•Separation distance did however have a significant impact on the rate of propagation.



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Results (Material & SOC): Temperature

• The average maximum temperature of the cells increased as state-of-charge increased.

• Insulative materials decreased the temperatures.

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Results (Material & SOC): propagation time

• The time required for the entire package to burn increased as state-of-charge decreased.

• Insulative divider materials increased the propagation time of the package.



09-11-14

Results: Packet of Water

• A Packet of water placed above the cells stopped propagation.

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Effect of Dividers on the Propagation of Thermal Runaway

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8 cell ICAO Packaging Regulation

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Summary

• An O2 overpack box didn’t contain a battery fire.• A steel drum didn’t contain a battery fire.• A 50% reduction in packaging density didn’t stop

propagation.• Extra cardboard between cells reduces the rate of

propagation but failed to prevent it.• Insulative materials between the cells reduced the rate of

propagation.• A decrease in SOC decreased propagation rate and

temperature.– Thermal Runaway didn’t propagate at 30% SOC.

• A water packet above the cells prevented propagation.• Battery dividers painted with intumescent paint failed to

prevent propagation.• 8 cell ICAO packaging regulation failed to prevent

propagation.

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Presented to: By: Date: Federal Aviation Administration Passive Fire Protection for Lithium Battery...

Documents

Transcript of Presented to: By: Date: Federal Aviation Administration Passive Fire Protection for Lithium Battery...