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Expert: Charging 100% is 10 times more likely to cause a fire than charging 90%
Statistics from the emergency management department show that the spontaneous combustion rate of new energy vehicles increased by 32% in the first quarter of this year, with an average of eight new energy vehicles spontaneously igniting and catching fire every day.
Don’t overfill the “Electric Daddy”!
Compared with fuel vehicles, the spontaneous combustion of electric vehicles often occurs more quickly and does not leave enough time for the driver and passengers to escape. Are electric vehicles safe or unsafe?
How to use electric vehicles to reduce the risk of spontaneous combustion has become a topic of concern to many consumers.
Recently, an expert gave an answer to the problem of spontaneous combustion of electric vehicles. He advises everyone not to fully charge your electric car.
Lu Shuai, former chief engineer of the Ferrari World Formula One electric drive system, professor at the School of Electrical Engineering at Chongqing University, and doctoral supervisor, first said that the risk of spontaneous combustion of electric vehicles does exist, “As long as it is a new energy vehicle using lithium batteries, it is theoretically possible There is a risk of combustion, and new energy vehicles cannot completely avoid this problem.” However, he also believes that in comparison, the risk of spontaneous combustion of lithium iron phosphate batteries is slightly lower. As for whether the spontaneous combustion rate of new energy vehicles after a collision is higher than For fuel vehicles, the current sample size is too small and it is difficult to judge.
Professor Lu Shuai also said that the risk of spontaneous combustion of new energy vehicles can be reduced by doing the following:
He said that he had conducted a large-sample experiment together with the OEM, setting the SOC to 90%, and the fire probability dropped to 1/10 of that under 100% full charge conditions.
Therefore, do not fully charge the battery, which can effectively prevent spontaneous combustion. Many car companies lock the battery of their models for the same reason.
Prepare a window-breaking hammer on the car to ensure that you can open the door in the event of a collision and break the window to escape at critical moments.
Slow charging will cause less damage to the battery and the risk of spontaneous combustion is also lower.
In recent years, new energy vehicle companies have been choosing ternary lithium batteries with high energy density and low thermal runaway limit in order to increase energy density and reduce consumers’ range anxiety. This can indeed improve the cruising range of new energy vehicles, but it also It has brought about an increase in the risk of spontaneous combustion, which is obviously putting the cart before the horse.
Safety should be given top priority at all times, and car companies cannot ignore safety for the sake of profit.
In addition, the safety testing of new energy vehicles in the industry is still imperfect. As the penetration rate of new energy vehicles gradually increases, the safety standards of related industries should also keep pace with the times.
Written by: David from WTech
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