LITHIUM-ION BATTERY FIRE PREVENTION

Lithium-ion battery fires are a growing concern with the rapid adoption of usage. I have a client with a new innovative technology for fire solutions in Lithium-ion battery systems. The technology will reduce the flammable gases, flaming fire, and toxic HF (hydrogen fluoride) gases during thermal runaway. This technology will significantly reduce the spread from module to module and the buildup of gases in the space.

The following are the highlights of problems, general issues, the current status, and description of new technology BFS (Battery Fire Solutions) developed by EmberTech, LLC.

Lithium-ion Battery Fire Problems Now:

  • Lithium-ion battery fires produce large amounts of flammable and harmful gases.

  • With the growing use of lithium-ion batteries, the probability of fire events have grown.

  • Lithium-ion batteries are used in transportation (Tesla), for electric grid support, for alternative energy storage, and in residential applications.

  • When a fire occurs, a buildup of flammable gases can cause an explosion, the fire will spread from rack to rack, and large amount of HF gases are produced.

The General Issues which are Universal:

  • The NFPA has initiated multiple research projects into the protection of lithium-ion batteries.

  • NFPA also has created a new fire code to attempt to address the lithium-ion fire protection (NFPA 855).

  • NFPA has created a training class for fire department personnel on how to address ESS systems.

  • Despite the NFPAs efforts, eight fire fighters were injured when at an ESS fire event.

  • ESS are being installed worldwide making this a universal issue.

The Current Status:

  • Stationary ESS systems are typically protected by multiple layers of fire protection including:

  • Localized rack fire protection such as Firetrace.

  • Gaseous systems such a FM200.

  • Water based sprinkler systems.

  • Smoke and heat detection.

  • One ESS installation visited had all 4 systems installed for protecting ESS racks.

  • Mobile ESS systems in a vehicle are not protected and rely on manual fire department intervention for fire suppression.

Our New BFS (Battery Fire Solutions) New Technology:

  • The issue with current protection methods is that they are all active post event suppression methods.

  • BFS attacks the issue at the source reducing the heat, flame, toxic, and flammable gases produced.

  • With our new fire suppression/elimination system, the BESS gases are drained away reasonably well and are environmentally more acceptable plus they do not ignite/flame when exposed to pilot flame.

  • BFS does not need “secondary” gaseous agents except for cooling, in some cases.

BFS Technology Description and Prototype Testing Results

Lithium-ion battery (BESS) fire and explosion mitigation using a combination of NHS and an additional fire suppression medium

Notes: Patents are pending on the BFS Technology

Nanomist Hybrid System (NHS Remote Agent Source, RAS)

Battery Trays.

18650 Li-ion Battery
 Laboratory "prototype tests"  of 18650 Li-ion Battery with Temperature Graphs:

Lithium-ion Battery Fire (Baseline)

Battery Fire Protection by BFS Technology

Note: The battery 18650 is inside the telltale cup.

The  white fumes evolving above the battery with BFS suppression medium was confirmed to be inflammable by propane pilot torch test. A movie clip is shown below.  Please click the link to play:

Lithium-ion Battery Fire: Demonstrating inflammability of gases evolving after BFS  Fire protection

Temperature graphs above the battery with and without the suppression medium

We have discovered a disruptive technology for Lithium-ion Battery Energy Storage System (BESS)  fire and explosion suppression without using a "Sprinkler System". Two patents are pending. Prototype tests are completed and third-party tests on practical battery rack systems are planned and will be completed soon.

NEXT STEPS: BFS TECHNOLOGY
  1. Plan: "Third-Party-Testing"  of Lithium-ion battery arrays for commercial applications such as BESS, Cars, FAA Transportation and others. Note: The fire prevention process does not need any battery modifications. It is independent of battery makes and its specifications.
     

  2. Plan: BFS technology for prevention of single or isolated cell explosion and fire has been demonstrated for special applications. The latest test outcomes seem promising and  will be published in this website and in LinkedIn soon after patent application. . There are no modifications needed for batteries. The fire prevention process is independent of battery makes/models.

Copyright © 2019  EmberTech, LLC. All rights reserved.

Contact:

K. C. Adiga, Ph.D.

kcadiga@EmberTechs.com