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Mining Contract: High Energy Battery Thermal Runaway Alleviation Protection (TRAP) Flame Arrestor for Mine Safety
Keywords: Batteries Ignition source elimination Permissible housings
This page is archived for historical purposes and is no longer being maintained or updated.
Contract #
75D30121C11477Start Date
9/1/2021End Date
8/31/2023Research Concept
A purpose-built flame arrestor and pressure relief system is needed for quenching lithium-ion battery (LIB) thermal runaway gases to avoid igniting the surrounding explosive atmosphere inside gassy mines.
Contract Status & Impact
This contract is complete. To receive a copy of the final report, send a request to mining@cdc.gov.
The amount of free space available in conventional explosion-proof (XP) enclosures approved by the Mine Safety and Health Administration (MSHA) may not be significantly voluminous to mitigate the pressure generated during an LIB thermal runaway event. This represents an acute safety concern for the mining industry, especially considering the incorporation of LIBs in conjunction with the recent emphasis to electrify mining equipment to improve safety, environmental footprint, and efficiency.
Under this contract, ADA Technologies will leverage its extensive experience with LIB failure as well as the early-stage development of an LIB cell-specific flame arrestor to design and implement a purpose-built flame arrestor for use in XP enclosures for applications in gassy mines. ADA recently developed an LIB safety enclosure for the Navy, performing extensive testing and modeling of the pressure spikes and explosive gas mixtures generated when an LIB fails in a sealed enclosure. Additionally, ADA is well versed in mechanical system design and the chemical engineering principles of heat exchange and gas transport, making ADA an ideal partner to successfully execute this research.
The thermal runaway alleviation protection (TRAP) arrestor developed under this contract will be composed of:
an XP-rated flange or joint to contain the arrestor components
a primary burst disc
flame arrestor elements
a secondary burst disc
baffles to support the flame arrestor elements
a pressure-rated housing to contain the flame arrestor elementsBy combining these elements into a flame arrestor system compliant with 30 CFR Part 18, ADA will design and develop a flame arrestor specifically for lithium-ion battery thermal runaway events for underground gassy mine applications. ADA will leverage the extensive experience of its key personnel and project partners in performing and quantifying LIB failure events, in particular the pressure spikes associated with failure events in sealed enclosures as well as mitigation of thermal runaway propagation.
See Also
Advanced Tutorial on Wireless Communication and Electronic Tracking: CT System Safety
Are lithium-ion cells intrinsically safe?
The Brookwood Disaster and Electrical Requirements for Hazardous (Classified) Locations
Development of a Through-the-Earth Monitor System
Further Study of the Intrinsic Safety of Internally Shorted Lithium and Lithium-ion Cells Within Methane-air
Performance and Safety Investigation of Emergency Backup Batteries and Battery Charging Systems for Underground Mining Applications
Radio System Modifications for Improved Mine Safety (Medium Frequency)
Supplementary Technologies for Advanced Mine Communication Networks
Technological Aspects of Solid-State and Incandescent Sources for Miner Cap Lamps
Technological Aspects of Solid-State and Incandescent Sources for Miner Cap Lamps
Page last reviewed: November 9, 2023
Page last updated: February 14, 2023
Content source: National Institute for Occupational Safety and Health, Mining Program
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