Lithium batteries are vital for modern society, powering everything from EVs and energy storage to laptops and e-bikes. However, their unique chemistry poses serious health and safety risks.
In the UK, employers handling, storing, charging, or transporting lithium batteries have legal duties to control the risks of fire, explosion, and chemical exposure. Non-compliance can result in legal penalties and harm.
What Are Lithium Batteries?
Lithium batteries use lithium-based electrochemistry for energy storage, primarily coming in two types:
- Lithium-ion (Li-ion) Batteries: Rechargeable and widely used due to their high energy density and cycle life. Applications include consumer electronics (phones, laptops), electric vehicles, power tools, and large-scale energy storage. They typically use a lithium metal oxide cathode and a graphite anode.
- Lithium-metal Batteries: Primarily non-rechargeable (primary cells). They feature a lithium metal anode, offering superior energy density compared to Li-ion but are not suited for repeated recharging. They are used in applications requiring long-term reliability and high single-use energy, such as medical devices (pacemakers), military equipment, safety equipment, and remote sensors.
Key Health and Safety Risks
- Fire and Explosion: Lithium cells contain flammable electrolytes. If breached, they can ignite or emit toxic gases.
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- Fires are difficult to extinguish and can reignite hours later.
- Incorrect charging or faulty equipment significantly increases risk.
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- Chemical Exposure: Damaged batteries may leak corrosive electrolytes containing lithium hexafluorophosphate (LiPF₆), which releases hydrogen fluoride (HF) when it comes into contact with moisture.
- Electric Shock and Burns: High-voltage EV or industrial batteries can cause electric shock or severe burns during maintenance or dismantling.
- Thermal Runaway During Storage or Transport: Overheating cells can trigger chain reactions, producing intense heat, smoke, and toxic vapour.
Risk Assessment and Control Measures
To comply with UK law, risk assessments must cover the entire battery lifecycle: receipt, use, storage, transport, and disposal.
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- Storage & Handling: Store in a cool, dry, ventilated area, away from heat/combustibles. Avoid heavy stacking. Segregate damaged batteries in fire-resistant containers.
- Charging & Maintenance: Use approved chargers with overcharge protection. Supervise charging; avoid unattended overnight charging. Install temperature and smoke detection in charging areas.
- Transport: Comply with ADR packaging, labelling, and documentation. Use UN-certified containers. Train logistics staff on Class 9 lithium battery provisions.
- Emergency Preparedness: Provide lithium-specific (Class D or clean agent) fire extinguishers. Develop thermal runaway and spill response plans. Inform local fire authorities of large storage sites.
- Training & Awareness: Staff must recognise early failure signs (swelling, heat, odour). Provide COSHH-compliant SDS. Train maintenance and waste teams on electrical isolation.
Relevant UK Legislation
Workplace management of lithium batteries intersects several UK regulatory frameworks:
- Health and Safety at Work etc. Act 1974: Duty to ensure the safety of employees and others.
- Management of Health and Safety at Work Regulations 1999: Requirement to assess and control risks.
- Dangerous Substances and Explosive Atmospheres Regulations 2002 (DSEAR): Control of flammable vapours and explosive atmospheres.
- Control of Substances Hazardous to Health (COSHH) Regulations 2002: Management of exposure to chemical hazards.
- Waste Batteries and Accumulators Regulations 2009 (as amended): Requirements for collection, recycling, and treatment of spent lithium batteries.
- Carriage of Dangerous Goods and Use of Transportable Pressure Equipment Regulations 2009 (CDG): Governs transport under ADR Class 9 (miscellaneous dangerous goods).
Alongside legislation, there are a couple of relevant British Standards, such as BS EN 50604-1 (testing of lithium traction batteries) and BS EN IEC 62619 for industrial applications.
End-of-Life and Waste Management
Spent lithium batteries are classed as hazardous waste under UK law. They must be:
- Collected separately from general waste;
- Stored in fire-resistant bins;
- Sent to an authorised treatment facility (ATF) or licensed recycler;
- Documented via waste transfer notes or hazardous waste consignment notes.
Improper disposal of lithium batteries leads to severe environmental, health and safety implications. from the risk of fire and explosion, to contamination of soil and water and air pollution.
Animals and humans can be poisoned by consuming water or soil contaminated by the chemicals that leech from lithium batteries, or by inhaling the toxic fumes or heavy metals (like Cobalt) which cause respiratory issues, cancer and heart diseases.
Illegal disposal or mixing with general waste can also result in prosecution under the Environmental Protection Act 1990.
Incident Trends and HSE Outlook
The UK Fire and Rescue Services report a rising number of incidents involving lithium batteries, particularly from e-bikes, energy-storage systems, and consumer electronics. The Health and Safety Executive (HSE) encourages employers to adopt a hierarchy of control approach, supported by emerging guidance from the Office for Product Safety and Standards (OPSS) and the Environment Agency on large-scale storage and recycling.
How can iCOR support organisations with Lithium Battery Safety in the Workplace?
iCOR helps organisations to reduce reliance on spreadsheets, save time, and feel more confident about legal and operational risk and legal compliance. The platform includes a self-audit tool that maps applicable environmental, health, and safety legislation into a tailored legal register, and allows you to track compliance actions, assign responsibilities, and present your progress.
Book a demo here to learn how iCOR can help you with Lithium Battery Safety in the Workplace, turning compliance into an integrated and continuous process that is accessible to everyone.
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