LITHIUM BATTERY FIRE EXTINGUISHER (HMS) — LIFEGUARD®
HMS (Hydrated Mica Suspension) extinguishers engineered for lithium-ion battery fires in high-rise buildings, buses & depots, rail systems, hospitals and public gathering places
Lithium-ion battery incidents behave fundamentally differently from ordinary Class A/B/C fires. They can enter thermal runaway, emit high-temperature jets and gases, and re-ignite after apparent suppression. Conventional extinguishing agents often fail to stop re-ignition or inadequately cool battery cells.
LIFEGUARD® Lithium Battery Fire Extinguishers use HMS — Hydrated Mica Suspension, a purpose-built inorganic suspension that cools, encapsulates and electrically insulates battery cells, delivering fast knockdown and long-dwell protection against re-ignition. This page explains why HMS is the superior choice for EVs, ESS/BESS, UPS rooms and any environment where lithium batteries are present.
At a glance — what HMS lithium battery extinguishers do
Rapid cooling of hot battery surfaces and cells
Encapsulation: forms a particulate barrier that reduces oxygen and heat exchange
Electrical insulation: lowers shock/arc risk during intervention
Re-ignition resistance: long-lasting surface protection reduces delayed flareups
Low corrosivity & minimal residue: easier post-incident cleanup than many powders
Product types & formats (retail & B2B)
Portable Handheld Extinguishers — 2 kg / 4 kg / 6 kg handheld units for vehicle bays, charger locations, pantries and small ESS racks.
Trolley / Wheeled Extinguishers — 25 kg / 45 kg for depots, workshops, larger battery rooms and parking basements.
Vehicle-Mounted Kits — compact HMS canisters for buses, service vans, and rail on-board kits.
Fixed Local Application Nozzles — point-of-risk cylinders or local delivery devices integrated into BESS enclosures or EV charging pods (used with detection & valve systems).
Suppression Packs for Battery Cabinets — small HMS dispensers sized per cabinet volume for micro-ESS or locker installations.
(Exact models, pressure ratings and run times are provided on request in product datasheets.)
Why HMS is the right agent for lithium battery fires
Addresses thermal runaway — HMS removes heat rapidly and forms a protective coating to interrupt the chemical chain reaction.
Prevents re-ignition — The mica barrier and cooling reduce the chance of delayed re-flare, a common failure mode with ABC powders.
Non-conductive & safe for live systems — reduces risk when battery systems remain energized during response.
Low corrosive impact — reduces damage to metal racks, electronics and infrastructure vs some halogenated agents or abrasive powders.
Occupant & facility friendly — suitable for occupied environments with appropriate SOPs; leaves manageable residue.
Applications — where to specify HMS extinguishers
High-Rise Buildings & Commercial Complexes
EV charging rooms, parking basements with EVs, UPS rooms, small ESS installations.
Portable HMS extinguishers placed near chargers, lift motor rooms and parking entry points.
Buses, Coaches & Fleet Depots
Onboard vehicle kits for EV buses (where regulation permits), depot workshop trolleys, charger bays and battery handling areas.
Combine with fixed detection and automatic suppression in battery bays for heavy-duty fleets.
Railways & Metro
Depot maintenance bays, charging sheds, auxiliary ESS rooms, on-board emergency kits for battery-powered units.
Integration with depot alarm systems and remote monitoring.
Hospitals & Healthcare
UPS rooms, battery racks for critical care equipment, ambulance/EV charging points — HMS minimizes corrosive by-product exposure to sensitive equipment.
Public Gathering Places
Mall EV charger pods, telecom backup rooms, public charger stations — portable HMS for first responders and site staff.
Industrial & Manufacturing
AGV battery rooms, robotics charging stations, small BESS supporting factory automation.
Typical specification highlights (for tender / BOM)
Agent: HMS (Hydrated Mica Suspension) — non-hazardous, non-combustible, electrically non-conductive.
Casing: Mild steel powder coated / stainless steel (SS304/316) options for corrosive/coastal/hospital zones.
Nozzle: Directed spray nozzle with controlled flow for surface cooling and coating.
Operating pressure: ~specified per model (refer to datasheet).
Discharge time: Model-specific; provide application (e.g., 10–40 s for handheld; longer for trolleys).
Mounting: Wall bracket, vehicle bracket, or wheeled base.
Documentation: Material safety data sheet (MSDS), performance test certificate, installation instruction, inspection log.
Integration with detection & suppression systems
Automatic pairing: For high-risk ESS rooms, combine HMS local suppression with thermal/IR detection, smoke sensors and automatic actuators.
Manual + auto hybrid: Automatic detection can actuate local HMS dispensers; portable units remain available for responders.
BMS & Fire Alarm integration: Event logging, remote release permission and interlocks with charge control systems recommended for complex installations.
Use & SOP (short standard operating procedure)
Ensure personal safety: Don PPE (gloves, face shield, breathing protection if available). Evacuate nearby unprotected occupants.
Isolate power/charging if safe to do so — cut incoming AC to chargers or isolate BMS via remote switch.
Apply HMS: Direct nozzle at the hot module/cell area from recommended distance; sweep to coat the pack surface and create visible HMS layer.
Cool & monitor: Continue cooling while maintaining safe distance; watch thermal camera/readouts where available.
Quarantine & monitor: After suppression, isolate the battery assembly for extended monitoring (thermal camera or temperature sensors) for at least 24–72 hours depending on system size and local guidance.
Report & dispose: Engage specialist battery disposal team—follow hazardous waste / manufacturer instructions.
LIFEGUARD supplies SOP templates, operator training and incident record forms as part of project support.
Maintenance & inspection schedule
Daily: Visual access check — extinguisher present, no obstructions.
Monthly: Visual inspection of pressure indicators, hoses/nozzles and seals. Log the check.
Quarterly: Full operational readiness check (nozzle flow test, actuator function for fixed units).
Annually: Certified service — refill/replace agent if needed, pressure vessel inspection if applicable.
Post-use: Replace or professionally recharge; do not attempt to reuse without certified service.
HMS has a long shelf life when stored per manufacturer recommendations; LIFEGUARD provides shelf-life data for each batch.
Safety & environmental notes
HMS is formulated to minimize corrosivity and environmental impact; refer to MSDS for handling and spill response.
Avoid inhalation of vent gases from battery combustion — use supplied breathing protection during direct intervention.
Keep used/contaminated HMS and battery remnants for specialist hazardous waste disposal.
For large ESS incidents, involve battery OEM & specialist fire teams—HMS is part of a layered response, not always a substitute for system isolation and specialist intervention.
Comparative matrix — HMS vs common extinguishing agents
| Feature / Risk | HMS (Hydrated Mica Suspension) | ABC Dry Powder | Water / Watermist | CO₂ / Clean Agents |
|---|---|---|---|---|
| Effective vs thermal runaway | High | Low | Medium (cooling) | Low |
| Prevents re-ignition | Yes (long-dwell) | No (may not prevent) | Limited (needs deep cooling) | No |
| Electrical non-conductive | Yes | Powder may be conductive (varies) | Water is conductive (risk) | Yes |
| Residue & cleanup | Low (non-abrasive) | High (abrasive, interferes with electronics) | Water damage possible | Low (but gaseous) |
| Safe for occupied spaces | With SOP & ventilation | Dust hazards; not ideal | Generally safe | Risk of asphyxiation in confined spaces |
| Best use | EVs, BESS, battery rooms, depots | General fires, fuel/solid | Class A, cooling, occupied areas | Sensitive equipment rooms (not batteries) |
Specification checklist for procurement (B2B)
Confirm battery chemistry and pack configuration (cell type, capacity, enclosures).
Provide average and peak battery pack energy (kWh) and rack dimensions.
Decide on portable vs trolley vs fixed local application per risk.
Specify desired nozzle type, discharge profile and minimum dwell time on surface.
Confirm mounting style and environmental finish (SS for coastal/hospital).
Ask for manufacturer performance test reports for lithium battery fire scenarios.
Include training, SOPs and AMC in purchase order.
LIFEGUARD will issue a tailored specification pack and BOM on receipt of site details.
Frequently Asked Questions (FAQ)
Q: Can HMS put out all lithium battery fires?
A: HMS is engineered specifically to manage cell thermal runaway, provide deep cooling and reduce re-ignition risk. For catastrophic large-scale BESS events, HMS is part of a multi-layer response (automatic suppression, cooling, isolation, specialist intervention).
Q: Is HMS safe to use near electronics and medical equipment?
A: HMS leaves minimal corrosive residue compared to many powders and is formulated to be equipment-friendly, but post-incident cleaning is still required. For sensitive rooms, evaluate tradeoffs and consult LIFEGUARD for test data.
Q: Can HMS be used on an energized battery?
A: HMS is electrically non-conductive and safer near energized cells than water, but live systems present arc risk—isolate power when feasible and follow SOPs.
Q: How soon after suppression can a battery be handled?
A: Always quarantine and thermally monitor the battery pack; re-ignition can occur hours after a flare. Typical monitoring is 24–72 hours depending on incident severity and pack size.
Q: Do you offer automatic HMS suppression systems?
A: LIFEGUARD provides both portable HMS extinguishers and local fixed discharge solutions that can be integrated with detection and automatic actuation for battery enclosures. Contact us for system design.
Standards, testing & certification
LIFEGUARD conducts internal performance testing against thermal runaway scenarios.
Product documentation includes MSDS, factory test certificates and service instructions.
For project bids where external standards (NFPA 855, UL 9540A, IEC/UL battery standards) are referenced, LIFEGUARD will provide technical annexes mapping HMS performance to relevant clauses and can support third-party verification where required.
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Call to Action — specification, demo & procurement
For site-specific recommendations, technical datasheets, training programs and quotations, contact:
United Fire Equipments Pvt. Ltd.
Manufacturer of ISI Certified Fire Safety Equipment
📞 8048034226
📧 ufe126@gmail.com, info@lifeguardindia.in
🌐 www.lifeguardindia.in
Please share: application (EV charging / depot / BESS / UPS), battery type & approximate kWh, preferred extinguisher format (portable / trolley / fixed local), and we’ll return a customised specification, performance data and procurement proposal.
