How SElf expanding Hydrogel works

Self Expanding Hydrogel (SEH)

SEH uses multiple advanced extinguish mechanisms that work together to effectively control and terminate lithium-ion battery fires.

1. Rapid cooling and flame extinguishment

SEH contains a high water content that instantly absorbs heat, eliminates flames and rapidly lowers battery temperatures. The gel adheres to hot surfaces, providing continuous cooling and preventing thermal runaway escalation.

2. Thermal isolation

The SEH forms a protective barrier around the battery cells, limiting heat transfer and preventing thermal propagation to adjacent cells. This helps contain the fire and reduces the risk of re-ignition.

3. Gas suppression & neutralization

During Lithium-ion battery fires, dangerous gases such as hydrogen (H₂), methane (CH₄), and hydrogen fluoride (HF) are released. Hydrogel helps reduce flammable gas concentrations, neutralizes toxic compounds, and suppresses combustion by limiting oxygen availability.

4. Lithium-ion stabilization

Special clay particles within the SEH penetrates the battery structure and capture reactive lithium ions (Li⁺). This reduces chemical reactivity inside the battery and contributes to complete fire termination and long-term stabilization.

5. Re-ignition prevention

Through sustained cooling, battery insulation and ignition blocking, SEH prevents the battery from reigniting – one of the biggest challenges in lithium-ion battery fire suppression. Together, these mechanisms make Hydrogel a unique and highly effective solution for lithium-ion battery fire safety.