February 2026 Safety Bulletin: Battery Safety
Updated: Aug 31
Battery Manufacturing Safety Requires a Process-Safety Approach
Battery manufacturing combines chemical processing with high-energy electrical systems. Depending on the chemistry and process, a facility may handle flammable electrolyte solvents, reactive materials, fine powders, corrosive liquids, toxic metals, and energized cells capable of thermal runaway. A strong battery manufacturing safety program should address normal operation, startup and shutdown, maintenance, rework, foreseeable abnormal conditions, storage, and emergency response.
Does OSHA Process Safety Management Apply?
Battery manufacturing is not automatically covered by OSHA’s Process Safety Management (PSM) standard. Coverage depends on the chemicals, quantities, process configuration, and applicable exceptions at a specific facility.
Under 29 CFR 1910.119, PSM may apply when a process contains a listed highly hazardous chemical at or above its threshold quantity, or involves the threshold quantity of a covered flammable material, subject to the standard’s definitions and exceptions. OSHA’s 2025 lithium-ion battery fact sheet also notes that PSM requirements may apply to some flammable electrolytes at quantities exceeding 10,000 pounds.
Facilities should therefore document PSM and EPA Risk Management Program applicability using maximum intended inventories, current safety data sheets, process information, and actual equipment relationships. Nebula provides PSM/RMP applicability assessments and process safety consulting.
Even when formal PSM coverage does not apply, tools such as Process Hazard Analysis (PHA), management of change, operating procedures, mechanical integrity, incident investigation, and emergency planning provide a disciplined framework for controlling serious battery-process hazards.
Key Hazards to Address in a Battery Manufacturing PHA
A PHA should reflect the facility’s actual chemistry, equipment, and operating envelope. Areas to evaluate include:
Chemical exposure and reactivity: OSHA identifies flammability, toxicity, corrosivity, and reactivity hazards among battery materials. Lithium hexafluorophosphate, a common electrolyte salt, can react with water to form hydrogen fluoride. Current SDSs and reliable exposure limits should inform controls.
Thermal runaway, fire, and explosion: OSHA states that manufacturing defects, mechanical damage, temperature extremes, and improper charging can initiate thermal runaway. Heat from one failing cell can damage nearby cells, while vented or combustion products can add flammable and toxic hazards.
Flammable liquids and vapors: Electrolytes and process solvents can create release and ignition scenarios during transfer, mixing, filling, drying, recovery, and waste handling.
Fine powders: Not every powder is combustible, but OSHA requires particulate hazard evaluations to consider explosibility. Facilities should obtain reliable material data and testing before selecting dust controls.
Stored electrical energy: Formation, testing, charging, and energized-cell handling can introduce short-circuit, shock, and rapid energy-release scenarios.
Lead-acid operations: OSHA identifies inorganic lead dust as the primary health exposure in lead battery manufacturing. Lead-specific exposure assessment and controls are required where applicable.
Foreseeable PHA Scenarios
The PHA team should examine credible deviations and failures across the full process, including:
Loss or reduction of ventilation, exhaust, cooling, or inerting
Incorrect material, cross-contamination, or an out-of-spec mixture
Powder accumulation, unintended dispersion, or an ignition source
Electrolyte leak, overfill, hose failure, or loss of containment
Cell damage, internal short circuit, overcharge, or failed test control
Failure of gas detection, alarms, interlocks, or emergency shutdowns
Improper segregation of damaged, suspect, or off-spec cells
Utility loss during a safety-critical production step
Fire-water, spill, or contaminated-runoff migration
The study should document causes, consequences, existing safeguards, recommendations, owners, target dates, and verified resolution.
Safeguards Should Follow the Hierarchy of Controls
OSHA recommends controlling hazards at the source. Depending on the site-specific hazard, safeguards may include:
Reducing hazardous inventories where feasible
Closed or automated transfer, enclosure, isolation, and local exhaust ventilation
Temperature and gas monitoring with appropriately designed alarms and interlocks
Controlled storage quantities and separation of damaged or suspect cells
Written safe operating limits, procedures, inspection, and preventive maintenance
Eyewash and safety-shower access where electrolyte exposure may occur
Spill control, containment, and waste-segregation procedures
An emergency response plan that addresses battery fires and hazardous decomposition products
Hazard Communication training, PPE, and industrial-hygiene monitoring based on exposure assessment
Nebula’s HSE and industrial safety services include chemical hazard evaluations, exposure assessments, emergency-action programs, hazardous-chemical storage support, training, and OSHA compliance assistance. Related air, water, waste, spill, and reporting needs can be reviewed through Nebula’s environmental services.
Management of Change Is Critical
OSHA advises facilities to assess new chemicals and address hazards as processes and technologies change. A management of change review should occur before changes to chemistry, particle size, solvent, supplier, cell format, production rate, equipment, control logic, ventilation, gas detection, fire protection, rework, storage, or waste handling are placed in service.
The review should identify new hazards, confirm design assumptions, update procedures and training, evaluate emergency-plan impacts, and complete pre-startup verification when warranted.
A Practical Battery Safety Action Plan
Build a complete chemical and energy inventory using maximum intended quantities.
Map the process from receipt through production, formation, storage, rework, scrap, and waste shipment.
Document PSM, RMP, environmental, and adopted fire-code applicability.
Conduct a PHA and assess any potential combustible-dust hazards using reliable material data.
Verify critical safeguards against the actual chemistry and operating envelope.
Close recommendations through a documented tracking system.
Integrate findings into management of change, procedures, training, maintenance, emergency planning, and audits.
Battery technology changes quickly, but the core objective remains constant: identify credible failure scenarios before they occur and maintain effective safeguards throughout the facility lifecycle. To discuss a battery-manufacturing PHA, applicability review, Dust Hazard Analysis, or compliance program, contact Nebula Safety & Environmental.
This bulletin provides general information and is not a site-specific regulatory determination. Requirements vary by chemistry, inventory, process, jurisdiction, and adopted codes.
Comments