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In 2020, there were 124 incidents of spontaneous combustion and smoke from electric vehicles. "In Wang Chuanfu's view, if not fundamentally corrected and allowed safety accidents to escalate, the problem of battery detonation will become the" number one enemy "for the better and faster development of the pure electric vehicle market.
The "correction" mentioned by Wang Chuanfu is to change the current market pattern of new energy vehicles dominated by ternary lithium-ion batteries. Last March, BYD announced the lithium iron phosphate blade battery, which has passed the most stringent needle testing in the current power lithium-ion battery field, and has reached the same level of range as high-energy ternary lithium-ion batteries.
Under the same test conditions, ternary lithium-ion batteries burn violently and emit smoke at the moment of puncture, while blade batteries do not exhibit smoke or fire. Safety is the biggest luxury of electric vehicles, "Wang Chuanfu said, stating that the acupuncture experiment will become a standard test item for all BYD pure electric models.
At the announcement meeting, Wang Chuanfu also introduced BYD's heavy truck crushing experiment on the entire battery pack. The video shows that after the battery pack was rolled by a 46 ton heavy-duty truck, there was no significant deformation, leakage, smoke or fire in the battery. There were no significant changes in the individual voltage, total voltage, and insulation resistance of the battery before and after rolling. The rolled battery can still be used normally after being packaged back on the vehicle.
It is reported that needle testing and heavy truck crushing experiments are favorable evidence of the safety of blade batteries. If the industry standard is 100 points, then we are 150 points. We hope to stifle battery detonation in the cradle, "Wang Chuanfu said.
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