20 Cell Thermal Runaway Propagation Test
We put 20 lithium-ion cells into simultaneous thermal runaway to test our non-flammable BESS technology. The cells were immediately suppressed by LiquidShield™ Immersion Technology and did not propagate.
Test Setup
- 325 NMC cells were submerged in our immersion fluid
- 20 cells were heated to cause thermal runaway (4 monitored)
- 4 cells additional cells were monitored but not heated
Key
- Heated Cell
- Non-Heated Cell
Results
- Thermal runaway starts after 33 minutes of heating
- Off-gases are vented 2 minutes after thermal runaway begins
- 6 minutes for all cells to be extinguished and stabilized
- Cell 1 (non-heated) was positioned in the middle of the heated cells but didn't enter thermal runaway
Cell Temperature During Thermal Runaway Test
Heated cell temperatures show a sharp spike at thermal runaway followed by rapid cooling after extinguishment.
While non-heated cells did not reach thermal runaway.
| Cell | Max Temp. |
|---|---|
|
Cell 1 |
114.3 °C |
|
Cell 3 |
147.4 °C
|
|
Cell 4 |
100.5 °C |
|
Cell 5 |
141.1 °C
|
|
Cell 6 |
241.9 °C
|
|
Cell 7 |
167.9 °C
|
|
Cell 8 |
36.1 °C |
Red = Heated Cell Temp.
*Graph shows 70 minutes of data on the X-axis
**Cell 2’s temperature sensor was damaged during testing
Impact
EticaAG’s 20-cell thermal runaway propagation test proves cell-level containment for our next-generation battery energy storage systems. In this large-scale test, 20 lithium-ion cells were heated to induce thermal runaway, then immediately suppressed by LiquidShield™ Immersion Technology, preventing propagation and keeping adjacent cells at safe temperatures.
Combined with HazGuard™ toxic gas neutralization, EticaAG delivers a complete safety system designed to protect communities, first responders, critical infrastructure, and the environment.
This fire-safe, immersion-cooled BESS architecture unlocks new siting possibilities, including indoor installations, dense urban areas, rooftops, and safety-critical facilities where conventional lithium-ion systems face restrictions.
Safe. Resilient. Reliable.
The New Safety Standard
LiquidShield™ Immersion Technology stops battery fires before they start, making battery energy storage safe for communities, critical infrastructure, and the environment.