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Immersion of 400 volt traction battery in fresh water and salt water
RISE - Research Institutes of Sweden, Safety and Transport, Safety.
2018 (English)Report (Other academic)
Abstract [en]

By means of these tests, where Li-ion batteries have been immersed in both fresh water as well as 3 % salt water, it was demonstrated that it is completely safe to be both in the water and in the direct proximity of a battery, in this case, with 400 volt direct current. This conclusion holds, on the condition that the exposed individual, in the direct proximity of the battery, does not actively touch any of the battery's poles. Analogous to this, it can be assumed that nor does an electric vehicle, which for some reason has entered a watercourse consisting of either fresh water or seawater, constitute a danger for those bathing in the immediate vicinity of the electric vehicle. However, this assumes that an individual who is diving or bathing does not touch exposed parts of the traction system (explanation, e.g. open battery case and directly taking hold of live exposed parts of the traction battery and its cells). However, these parts are normally built into the vehicle's protective structures and are hard to access by inadvertent contact. The commercially available, factory produced, electric vehicles made by serious designers and automotive companies have a monitoring system in their systems that immediately switch off the power supply from the traction battery to the electric vehicle's traction system. This provides additional personal protection for anyone (e.g. fireman) who has the task of helping passengers who have entered a watercourse along with their electric vehicle. During immersion in salt water, a pungent chlorine gas was generated, which can be thought to collect inside a vehicle's air pockets; whether these gas mixtures are flammable or not has not been studied during these tests. No drastic events could be observed during any of these tests, however, one should be aware that a battery, which for some reason has been in immersed in water and has not discharged, can still have a hazardous voltage level after many months. This is something that the rescue service, automotive mechanics and car recyclers in particular should be informed.

Place, publisher, year, edition, pages
BorĂ¥s, 2018. , p. 21
Series
RISE Rapport ; 2018:33
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:ri:diva-33934ISBN: 978-91-88695-70-3 (electronic)OAI: oai:DiVA.org:ri-33934DiVA, id: diva2:1217523
Available from: 2018-06-13 Created: 2018-06-13 Last updated: 2018-06-21Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • en-US
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  • Other locale
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