If the 811 battery of CATL catches fire, the whole vehicle will be compensated?

by:CTECHi     2021-08-30
Compared with lithium iron phosphate batteries, ternary lithium batteries have higher energy density and better discharge performance in winter. Under the same volume and weight, the battery capacity of the ternary lithium battery is larger. However, ternary lithium batteries are not as stable as lithium iron phosphate batteries and are prone to thermal runaway, which is also a fact recognized in the industry. Since the beginning of this year, domestic new energy vehicles have had many fires and spontaneous combustion incidents, and most of the vehicles involved are equipped with ternary lithium batteries, which has also triggered consumers' safety in electric vehicles equipped with ternary lithium batteries. Worry. However, compared with the various safety commitments on other vehicles, GAC NIO is very bold and directly promised, “If a vehicle catches fire due to the 811 battery of the Ningde era, the whole vehicle will be compensated!” In addition, GAC NIO also proposes: All car manufacturers using CATL batteries in the industry have jointly promised to protect the rights and interests of users! It is reported that domestic electric vehicles mainly use nickel-cobalt-manganese (NCM) ternary lithium batteries. After containing manganese, the battery is more stable, and the proportion of nickel is reduced, and the battery is also safer. The 811 ternary lithium battery is an 'optimal solution' in the nickel-cobalt-manganese battery. The structure of the battery is a ternary lithium battery with nickel-cobalt-manganese in the cathode material and a content ratio of 80%:10%:10%. The energy density of a single unit can reach 300Wh/kg, which is one of the reasons why the endurance of domestic cars has generally soared after using the 811 ternary lithium battery of the Ningde era. However, the 811 battery also has hidden dangers. As the nickel content increases, the stability of the positive electrode material decreases. Under cyclic charging and discharging and high temperature, the capacity attenuation accelerates, the battery life is reduced, and the risk of spontaneous combustion of thermal runaway also increases. It is understood that currently only one model GAC Weilai 007 has been launched under GAC Weilai. There are 5 models on sale, and the price after subsidy is 259,800-400,000 yuan. The standard endurance version has a battery capacity of 73kWh and a NEDC range of 523km. The high-endurance version is equipped with the 811 ternary lithium battery of CATL, with a battery capacity of 93kWh and a NEDC cruising range of 643km. However, even if GAC NIO gave the promise of full compensation for the entire vehicle if the 811 battery caught fire in the Ningde era. But consumers will also consider carefully when buying. After all, after a vehicle catches a fire, the vehicle is priceless, but life is priceless. Therefore, how to reduce the fire accident rate of major new energy automobile manufacturers has gradually become an industry problem that needs to be solved urgently.
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