EVault suppresses EV battery fires, neutralizes hydrogen fluoride at the source, and captures RCRA-regulated runoff — all in a single mobile deployment.
When a lithium-ion battery enters thermal runaway, it doesn't just burn — it releases hydrogen fluoride (HF), a highly toxic acid that contaminates water, injures first responders, and creates significant environmental liability.
A Tesla Model S struck a tree and went into thermal runaway. Fire crews suppressed visible flames and declared the scene controlled. As the tow truck began moving the vehicle, the battery reignited — releasing a toxic vapor plume of HF and metal nanoparticles. Five firefighters were exposed. Four remain unable to return to work as of October 2025, with injuries including 20% lung function decrease, renal compromise, and cardiac symptoms. NIOSH conducted a formal federal investigation. This is the exact operational gap EVault is designed to close. (Source: Sacramento FD Green Sheet, CA Energy Commission TN 268919; NIOSH 2026)
EVault is an open-top, watertight roll-off container platform that covers the complete EV battery fire incident lifecycle — from first flame to final disposal.
Full vehicle immersion eliminates thermal runaway propagation. Direct liquid contact increases heat transfer 1,000–10,000× vs. air cooling. Open-top design vents hydrogen gas safely, preventing secondary explosions.
Pre-loaded potassium acetate (KAc) neutralizes hydrogen fluoride as it evolves. Calcium carbonate precipitates dissolved fluoride as calcium fluoride (CaF₂) — a non-hazardous insoluble solid. No competitor does this.
Watertight walls and floor contain 100% of incident water. Chemically treated water becomes containerized waste — significantly reduced acute toxicity before transport to licensed TSDF.
Submerged vehicles can be safely transported to long-term storage — eliminating reignition risk during towing. Designed for hook-lift roll-off trucks already in every tow fleet.
Integrates with existing tow infrastructure — no new vehicles or equipment required. Compatible with standard hook-lift trucks rated 16,000–18,000 lbs. Deploys in minutes on scene.
Provisional patent #64/106,038 filed July 6, 2026. Prior art search confirmed no existing product combines open-top immersion + KAc/CaCO₃ chemistry + runoff capture in a single mobile platform.
When a lithium-ion battery burns, it releases hydrogen fluoride — one of the most acutely toxic industrial chemicals known. EVault's proprietary treatment chemistry neutralizes HF as it evolves, converting it into a non-hazardous solid before the water ever leaves the container.
EVault's pre-loaded treatment agents react directly with hydrogen fluoride as it is released during thermal runaway — neutralizing it at the source rather than letting it escape into the environment or concentrate in runoff.
A secondary reaction precipitates dissolved fluoride ions out of solution as an insoluble, naturally occurring mineral solid — validated at >95% fluoride removal in peer-reviewed literature.
The captured water exits the incident with significantly reduced acute toxicity and fluoride concentration — lowering RCRA classification risk, reducing disposal cost, and protecting downstream waterways.
EVault's treatment method is protected under provisional patent filed July 6, 2026. The approach is validated by multiple peer-reviewed studies and independent laboratory data. NFPA's 2025 technical committee named HF runoff "an unresolved industry problem." EVault is the first system engineered to solve it on-scene.
EVault is the only system that addresses all four pillars simultaneously.
| Capability | EVault ✦ | Firebox USA | LOXXER / E1 Tank | Rosenbauer BEST | Fire Blankets |
|---|---|---|---|---|---|
| Thermal suppression | ✓ | ✓ | ✓ | Partial | Partial |
| HF neutralization (in-situ) | ✓ | ✗ | ✗ | ✗ | ✗ |
| Runoff capture | ✓ | ✓ | ✓ | ✗ | ✗ |
| Transport-safe containment | ✓ | Partial | ✗ | ✗ | ✗ |
| Open-top (H₂ safe) | ✓ | ✓ | Varies | N/A | ✗ Danger |
| Prevents reignition in transit | ✓ | Partial | ✗ | ✗ | ✗ |
| Reduces hazmat disposal cost | ✓ | ✗ | ✗ | ✗ | ✗ |
Every claim EVault makes is backed by peer-reviewed research, federal guidance, or independent laboratory testing.
"No generally accepted, scientifically validated method" exists for EV battery fire suppression.
45% annual EV fire growth rate. 90% of incidents go unreported nationally.
Closed enclosures failed catastrophically during lithium-ion thermal runaway testing — confirming open-top is the correct engineering choice.
96.2% fluoride removal via CaCO₃ precipitation chemistry — the core of EVault's treatment system.
Joint warning against closed EV containment methods (fire blankets) following documented deflagrations.
Ride-along confirmed operational gap. Real tow company, real incident history, expressed interest in pilot deployment.
EVault integrates directly with hook-lift roll-off trucks already operating in every tow and recovery fleet. No new vehicles, no new equipment purchases — just a container that turns an existing truck into a complete EV fire response unit.
Designed for standard hook-lift trucks rated 16,000–18,000 lbs. If you run roll-off, you can run EVault.
The Sacramento FD incident — where a vehicle reignited on the flatbed — is exactly what EVault prevents. Vehicle stays submerged from scene to storage facility.
EV fire liability is shifting to tow operators. EVault provides a documented, defensible response — reducing exposure and insurance risk.
We're actively seeking tow and salvage partners in Southern California for our Phase I validation study. Contact us to discuss partnership terms.
Whether you're a tow operator, fire department, investor, or research partner — we want to hear from you.