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DNV-GL Lithium-ion Battery Safety Program Concludes

DNV-GL Lithium-ion Battery Safety Program Concludes

March 5, 2020 Posted by Gian Valli
The Li-ion Tamer system mounted with battery racks for enabling prevention of thermal runaway.
DNV-GL has recently concluded an exhaustive study of battery safety and summarized the results of the study in a report titled Technical Reference for Li-ion Battery Explosion Risk and Fire Suppression. The project stemmed from a lithium-ion battery safety joint development initiative and included several players from the maritime industry, including ABB, Corvus, LeClanche, Kongsberg, and many others. While the program was put together with maritime industry partners, the learnings can be applied to the stationary energy storage market as well.
This report is intended to enable persons assessing energy storage installations, whether from a design, engineering, or regulatory perspective, to better evaluate risks, capabilities, and solutions with regard to safety. Project work was initiated and managed by DNV-GL as a joint development project – a collaborative effort from many essential partners representing the entire maritime battery value chain.
The study evaluated lithium-ion batteries with Nickel Manganese Cobalt (NMC) and Lithium Iron Phosphate (LFP) cathode chemistries from various manufacturers. The main conclusions involved:
  • Fire suppression solutions
  • Heat and gas generation
  • Toxicity
  • Off-gas detection
  • Ventilation

 The Li-ion Tamer sensor indicates only seconds after off-gassing occurs. In addition, testing was performed where a cell was being overcharged and charging stopped when off-gas was released as indicated by the Li-ion Tamer. The cell temperatures ceased to increase, and off-gassing started to decline until the cell was considered stable. Thus, demonstrating it is feasible to ‘pull back’ a cell after it has begun off-gassing but before thermal runaway occurs.

  • DNV-GL, Technical Reference for Li-ion Battery Explosion Risk and Fire Suppression
On the topic of off-gas detection, the report noted utilizing Li-ion Tamer as an early detection method allowed for thermal runaway to be mitigated.  Also noting that early detection, coupled with correct system shutdown measures is an important safety barrier for energy storage systems.
Schedule a 1-on-1 Webinar with our Energy Storage Safety Experts to Learn How to Prevent Thermal Runaway
Throughout the testing, Li-ion Tamer consistently out-performed the Lower Explosive Limit sensors and smoke detectors it was stacked up against, providing the earliest warning of battery degradation.  With the extra time prior to thermal runaway, preventative actions may be initiated to avoid catastrophic failure.  Proper integration of our Li-ion Tamer system, paired with the recommended system responses shown below, can isolate and mitigate failures before there is ever an issue.
System Shutdown
Ventilation
Increased Cooling
Local Alarm
Remote Alarm
If you are interested in learning more about our product and how it can be integrated into your systems to prevent thermal runaway, please contact us.
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About Gian Valli

Gian Carlo is an Applications Engineer at Nexceris and works primarily on the Li-ion Tamer® product line. He has a B.S. in Mechanical Engineering from The Ohio State University with a focus on product design. His experience testing lithium ion batteries has given him an in-depth understanding of the best practices for Li-ion Tamer applications.

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