LTI: Severe burn from short circuited Li-Ion battery

  • Safety Flash
  • Published on 18 December 2018
  • Generated on 11 December 2024
  • IMCA SF 28/18
  • 3 minute read

A crew member suffered severe burns when a Lithium-Ion battery on his person exploded and caught fire.

What happened?

The crew member was about to do the last task of the shift.  He picked up a set of keys and a spare battery for his vaporizer from the table and put them in his pocket.  He heard a loud bang and surprised, looked around to see the origin of the sound, and only then finding out that he was on fire.  A motorman working nearby came to his aid and together they managed to get his boiler suit off.  They saw the burning battery on the deck and stamped out the fire.  Further assistance was called, and first aid was applied.  The injured person was medevac’d shortly after to a shore-based hospital, where he was treated for 10 days before being repatriated to his home and undergoing further treatment.

What was the cause?

The metal keys created a short circuit with the battery.  Carrying the battery in his pocket with the keys enabled the keys to provoke a ‘thermal runaway’ by either puncturing the outer shield or by making a connection between the plus and minus layers; the exact cause could not be determined conclusively.

The exploded battery and replacement

The exploded battery and the one it was supposed to replace if required.

Keys that caused the short circuit

The keys that caused the short circuit

2nd and 3rd degree burns to leg

The burn – which was classed both 2nd and 3rd degree – temperatures estimated at approximately 1000 °C

This photo may show graphic content.

The pocket burnt through

The pocket – burnt through

What went wrong?

The crewman was carrying the Li-Ion battery loose in his pocket together with metal keys.  This caused a short circuit of the battery and initiated a ‘thermal runaway’, which caused the battery to burst and explode into flames.

When he picked up his belongings, he stated that he was not even aware of the battery being amongst his belongings, he just scooped it all into his pocket.

Our member noted that the following:

  • There was no box used for carrying the Li-Ion battery.
  • The safety warning provided was only the one actually written on the battery. No information had been provided by the supplier of the equipment of which the battery was a part.

What actions were taken? What lessons were learned?

Lithium-Ion batteries, which are more and more common in devices used onboard, are not controlled properly and it cannot always be expected that the proper and correct information has been provided by the supplier.

Lithium-Ion batteries sometimes come in size and design similar to ‘AA’ sized batteries and as such can be easily confused with a normal alkaline battery, and thus the risk associated is also confused.

Our member prohibited the carrying of loose Lithium-Ion batteries whilst at work, added appropriate issues and precautions to the vessel induction information displayed onboard, and ensured that a check was made by stewards during cleaning of cabins in order to identify batteries being charged unattended.

Members are recommended to:

  • Ensure that all persons are properly informed about the hazards associated with Lithium-Ion batteries. This should include the charging, handling and storage and the risk associated with carrying the batteries loose in pockets.
  • Consider more thorough control of small personal electronic devices using Lithium-Ion batteries.

Latest Safety Flashes:

LTI: Finger injury during emergency recovery of ROV

A worker suffered a serious finger injury when their finger was caught between a crane wire and the recovery hook on an ROV.

Read more
BSEE: recurring hand injuries from alternative cutting devices

The United States Bureau of Safety and Environmental Enforcement (BSEE) has published Safety Alert 487.

Read more
NTSB: Crane wire failure

The National Transportation Safety Board of the United States (NTSB) published "Safer Seas Digest 2023".

Read more
Hot work performed outside of Permit to Work (PTW) boundary limit

A near miss occurred when a third-party contractor working removed a trip hazard from the vessel main deck, using a cutting torch and grinding disc.

Read more
Vital safety information (height of vehicle) found incorrect

“Height of vehicle” information displayed on a truck, was found to be incorrect.

Read more

IMCA Safety Flashes summarise key safety matters and incidents, allowing lessons to be more easily learnt for the benefit of the entire offshore industry.

The effectiveness of the IMCA Safety Flash system depends on the industry sharing information and so avoiding repeat incidents. Incidents are classified according to IOGP's Life Saving Rules.

All information is anonymised or sanitised, as appropriate, and warnings for graphic content included where possible.

IMCA makes every effort to ensure both the accuracy and reliability of the information shared, but is not be liable for any guidance and/or recommendation and/or statement herein contained.

The information contained in this document does not fulfil or replace any individual's or Member's legal, regulatory or other duties or obligations in respect of their operations. Individuals and Members remain solely responsible for the safe, lawful and proper conduct of their operations.

Share your safety incidents with IMCA online. Sign-up to receive Safety Flashes straight to your email.