2/7/2024 0 Comments Ion delugeSeveral standalone battery modules and also a full scale EV were tested by bringing the batteries into a state of thermal runaway, resulting in battery fire. Successful extinguishing of an EV battery in 4 minutes - with only 63 gallons if water The report also stresses the importance of only using tools and methods approved by the employer. The report from MSB underlines that operators wishing to try this do so only after a thorough risk assessment, and only after receiving the appropriate training in the use of tools approved for the purpose by the manufacturer. The reason fog nail and pickaxes were deemed inappropriate is that those methods showed an increased tendency for dangerous jet flames to shoot out of the battery, and it also exposed the firefighter to a greater risk of electrocution from the remaining current in the battery. Other methods tested, like the use of fog nails or pickaxes to break the battery shell before water was applied, are not recommended in the report. This uses water at 75 l/min.įog nails and pickaxes not recommended for safety reasons This uses the axe to make the hole in the battery and then the pipe to inject the water into the battery. Water injection using an axe and a pipe connected to a water supply. Insulated Penetrating Lance equipment – this uses a low-pressure water supply to apply water but without using any abrasive, this uses water at 25 l/min.This is all applied using one continuous action. Cobra Ultra High Pressure Lance (UHPL) firefighting equipment – this equipment uses abrasive entrained in water to pierce and then water mist to suppress/extinguish.The reason for the more successful extinguishing with the cutting extinguishers, as opposed to other methods, is that those tools use high pressure water (sometimes mixed with an abrasive) to cut through the battery shell, minimizing the introduction of oxygen to the cell. They also provided the safest methods for the operator, with the lowest risk of re-ignition or dangerous jet flames. Several methods and tools were tested, and the high pressure extinguishing tools produced the best results. In the case of the full scale, the Cobra Cutting Extinguisher was used to penetrate the protective shell of the EV lithium battery, with minimum introduction of oxygen to the cell.Īvoid jet flames and other risks by using the appropriate penetration tools Both tools extinguish fires from a safe distance through the use of a water mist which can penetrate walls and other hard surfaces. Please note, that for safety reasons, the use of fog nails or pickaxes (to break the battery shell before water was applied) are not recommended in the report.ĭon´t miss any ctif news - follow link to sign up for our CTIF NewsletterĪs a stakeholder in the project, our CTIF Associate Member Cobra Cold Cut Systems provided their Cobra Ultra High pressure lance.Īlso tested was the Murer extinguishing lance. Several different kinds of equipment was tested, including fog nails, pickaxes, traditional nozzles and various penetrating extinguishers (which use water mist to cut holes through the protective shell of the battery). The tests were designed to examine whether injecting water into a Li-ion battery that had gone into a state of thermal runaway could effectively suppress and extinguish the fire without reignition. CTIF ´s Yvonne Näsman and Per- Ola Malmquist have been project members on behalf of MSB.se. The report is based on the results on a number of tests carried out in a collaborative project involving several stakeholders, including the CTIF Commission for Extrication and New Technology, and CTIF Sweden, where Tore Eriksson, Tom van Esbroeck & Michel Gentilleau have been part of the reference group. Parts of the tests involved flooding an isolated EV battery cell with water several tools, on this picture an E-Extinguishing lance was used.Ī report from tests made public by the Swedish Civil Contingencies Agency (MSB) shows that a cutting extinguisher can safely put out a battery fire in a very short time, with minimal use of water and without the risk of re-ignition.
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