Outside of Tesla, who as I've posted have been less than responsible in their battery and safety policies, this is not a problem.Here's one big disadvantage of electric cars that needs to be sorted. Once the battery is damaged, it's really tricky to move anything because more cells could short and restart the fire.
The battery can be damaged by impact from just about any direction, while as an IC car is only vulnerable from behind, not counting electrical faults. Even then, the tank location and impact dynamics have been well-sorted over the years, so impact explosion is very rare and only in petrol cars. It's not at all easy for diesel to start burning unless there's already a fire from something else.
Petrol cars are far more at fuel fire risk following electrical faults starting fires, the motorway people deal with them regularly but have never had to deal with an e-car traction battery fire other than Tesla.
The Leaf is the largest selling e-car with nearly a third of a million on the road extending back a decade and non-Tesla e-cars now total well over half a million, all without traction battery accident problems.
Their batteries are well protected within a space frame between the axle lines, so in turn are protected by the anti-crush passenger compartment. Most e-cars are inherently safer anyway, being slower in the upper speed range. Most of the acceleration potential is in the lower half of the speed range and a lowish top speed around or under 90 mph is normal. Not that it gets used, most e-car driving on motorways is at around 60 mph for consumption reasons, they get very greedy above that.
And because they are so new, they tend to be stuffed with automatic safety features. Mine has front radar, eight sonar sensors and four all round cameras, capable of issuing warnings and when necessary in dangerous circumstances braking the car without my intervention.
Plus ABS, ARC, ICC and TPMS making sure the car is under control at all times. Not to mention the driver aids like blind spot warning, rear cross traffic alert and forward collision warning to warn on those occasions when concentration isn't what it should be.
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