Get A Electric Car They Said
Do electric cars pose a greater fire risk than petrol or diesel vehicles?
The science
There are millions of electric cars on roads around the world, so some data on the prevalence of fires is emerging, albeit in piecemeal fashion. That evidence suggests there is no reason to think that EVs are more likely to go up in flames, several experts have said. Indeed, the opposite appears to be true.
“All the data shows that EVs are just much, much less likely to set on fire than their petrol equivalent,” said Colin Walker, the head of transport at the Energy and Climate Intelligence Unit thinktank. “The many, many fires that you have for petrol or diesel cars just aren’t reported.”
Fires can start in several ways. Car batteries store energy by moving lithium ions inside a battery cell but if cells are penetrated or if impurities from manufacturing errors cause short-circuits, then unwanted chemical reactions can start “thermal runaway”, where cells heat up rapidly, releasing toxic and flammable gas. In petrol cars, fires can start via electrical faults causing sparks or if the engine overheats because of a fault in the cooling systems, potentially igniting flammable fuel.
In Norway, which has the world’s highest proportion of electric car sales, there are between four and five times more fires in petrol and diesel cars, according to the directorate for social security and emergency preparedness. The Swedish Civil Contingencies Agency this year found that there were 3.8 fires per 100,000 electric or hybrid cars in 2022, compared with 68 fires per 100,000 cars when taking all fuel types into account. However, the latter figures include arson, making comparisons tricky.
Australia’s Department of Defence funded EV FireSafe to look into the question. It found there was a 0.0012% chance of a passenger electric vehicle battery catching fire, compared with a 0.1% chance for internal combustion engine cars. (The Home Office said it was unable to provide data for the UK.)
Elon Musk’s Tesla is the world’s biggest maker of electric cars. It says the number of fires on US roads involving Teslas from 2012 to 2021 was 11 times lower per mile than the figure for all cars, the vast majority of which have petrol or diesel engines.
https://www.theguardian.com/business/2023/nov/20/do-electric-cars-pose-a-greater-fire-risk-than-petrol-or-diesel-vehicles
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