According to battery.com.cn, recently, an electric car in Nanjing was hit by a seat under the electric car. What is the cause of self-ignition of electric vehicles? Many respondents said that they are rare and very curious. Yesterday, the reporter interviewed some electric vehicle maintenance masters and industry experts.
An electric vehicle monopoly repair station, Zhao, said, "The battery of the old electric car will swell after long-term charging, and the battery packs in the battery box are connected by copper wires. After long-term collision, friction, copper wire. The surface plastic film has been damaged, and once the bare positive and negative electrodes are in contact, a short circuit occurs and a fire will occur in an instant. Otherwise, there is no other reason to explain the accident."
"In the final analysis, it is because of the battery." Zhao said that the situation of the incident is that the power is turned on. If the power is not turned on, the possibility of spontaneous combustion is small. However, when electric vehicles are charged, the possibility of spontaneous combustion is also high. "The battery in the overage service is very dangerous. The more the battery is charged, the higher the electrolyte concentration becomes, the charger can not recognize the voltage; the temperature inside the long-term rechargeable battery may be as high as 100 degrees Celsius, the electrolyte evaporates due to high temperature, this hot temperature The copper wire will be exposed to the nakedness, and there is also a huge potential safety hazard."
Director Zhao pointed out that if charging for 8 to 12 hours is still "filled with dissatisfaction", it should be resolutely abandoned and replaced with new batteries.
Subsequently, a person in charge of the Jiangsu Electric Vehicle Association, Lu, affirmed the view of Zhao. As far as he knows, although self-ignition of electric vehicles is rare, it has occurred from time to time. "Although the voltage of electric vehicles is relatively low, the safety problem cannot be ignored." He pointed out that the old, long-term overload operation, overload, battery failure, and large-scale discharge and discharge of electric vehicles have all buried potential safety hazards.
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