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Presented to:
By:
Date:
Federal AviationAdministration
Passive Fire Protection for Lithium Battery Shipments
ICAO
FAA Fire Safety
09-11-2014
2Federal AviationAdministration
Passive Fire Protection for Lithium Battery Shipments
09-11-14
Results: Over-Pack Box
2
3Federal AviationAdministration
Passive Fire Protection for Lithium Battery Shipments
09-11-14
Results: Steel Drum
3
4Federal AviationAdministration
Passive Fire Protection for Lithium Battery Shipments
09-11-14
Results: Density Reduction
4
5Federal AviationAdministration
Passive Fire Protection for Lithium Battery Shipments
09-11-14
Separation Distance Tests
5
State of Charge Two sheets of cardboard (.3” thick)
Three sheets of cardboard (.45” thick)
Five sheets of cardboard (.75” thick)
60%
6Federal AviationAdministration
Passive Fire Protection for Lithium Battery Shipments
09-11-14
Results (Separation Distance)
6
•Larger separation distances were not very effective at reducing cell temperatures.
•Separation distance did however have a significant impact on the rate of propagation.
7Federal AviationAdministration
Passive Fire Protection for Lithium Battery Shipments
09-11-14
Results (Material & SOC): Temperature
• The average maximum temperature of the cells increased as state-of-charge increased.
• Insulative materials decreased the temperatures.
7
8Federal AviationAdministration
Passive Fire Protection for Lithium Battery Shipments
09-11-14
8
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.
9Federal AviationAdministration
Passive Fire Protection for Lithium Battery Shipments
09-11-14
Results: Packet of Water
• A Packet of water placed above the cells stopped propagation.
9
10Federal AviationAdministration
Passive Fire Protection for Lithium Battery Shipments
09-11-14
Effect of Dividers on the Propagation of Thermal Runaway
10
11Federal AviationAdministration
Passive Fire Protection for Lithium Battery Shipments
09-11-14
8 cell ICAO Packaging Regulation
11
12Federal AviationAdministration
Passive Fire Protection for Lithium Battery Shipments
09-11-14
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.
12