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With immature technology, poor safety and frequent spontaneous combustion accidents of electric vehicles, can oil-powered vehicles still be trusted

With immature technology, poor safety and frequent spontaneous combustion accidents of electric vehicles, can oil-powered vehicles still be trusted


With the proposed six standards with a variety of electric vehicle blowout, a variety of car brands have emerged, then today let's talk about electric vehicles in the end depend on not reliable. Although new energy vehicles have been very popular recently, there have been a lot of accidents. Recently, the 650EV of Lifan pure electric vehicle, which has just been on the market for more than two months, had a spontaneous combustion accident in Guangzhou. According to media reports, the scene was full of smoke and the bottom of the vehicle also exploded from time to time. Finally, the fire was extinguished after the electric car was completely burned down. After the incident, Lifan sent relevant technicians to test the vehicle. It was preliminarily determined that the fire was caused by spontaneous combustion of the vehicle's battery, which was caused by the heavy rain in Guangzhou for several days. The vehicle was soaked in rain for more than two hours, resulting in battery leakage. As a result, when the owner of the car when the circuit connection caused a short circuit, the battery immediately caught fire.

Speak of the spontaneous combustion of lifan electric vehicle before the case is not the first time, as early as in 2016 when the lifan 320 ev in addition a electric cars is on fire accident happened, and the latest fire lifan 650 ev, soon after the listed have been forced to recall, the reason is that the transmission and motor controller program out of the question. That's enough to say that the quality of Lifan's electric cars is really scary. The Lifan electric car that caught fire was self-assembled with ternary lithium-ion batteries made by Tianjin Lishen, according to a product declaration catalog from the Ministry of Industry and Information Technology. At present, in addition to Lifan, Jianghuai, SAIC, Changan, Geely, Dongfeng and other car companies are also used by Tianjin Lishen production of this motor. Actually because work principle about, besides lifan, recently, new energy vehicles on fire is caused by a few days ago the new forces of horse motor's EX5 in chengdu institute campus also spontaneous combustion accident happened, but later the official claims to be researcher violations forced electricity cause short-circuit caused vehicle batteries battery pack spontaneous combustion, The vehicles are powered by battery cells made by Valenshen. Really can afford but can't use.

Not only our country's spontaneous and independent electric car brand abroad often have electric car has the accident of spontaneous combustion, such as the world's most successful electric car tesla its vehicle fire accidents are no less, in January 2018 in chongqing this year tesla under the situation of no charge no collision spontaneous, second in the United States in March, A Tesla car crashed into a barrier at the side of the road and burst into flames, before it spontaneously combusted in a collision in the US in May.

In fact, Tesla has well protected the battery pack of its vehicles, using high-strength aluminum bulletproof composite material, which has reached the level of military use. In this respect, it is obviously much stronger than those large and small new energy vehicle companies in China. Moreover, Tesla has also developed a very powerful battery management technology to ensure the consistency of charge and discharge of each cell in the car battery pack, which makes the battery more stable and greatly reduces the risk. However, the lithium-ion batteries used in new energy vehicles are inherently unstable and may cause fire once they are hit, short-circuit or high temperature. Moreover, in order to have a longer range, Tesla cars are equipped with a full 7,000 lithium-ion batteries, which may increase the risk with longer range.

According to the current situation of the automobile market, on the one hand, more and more new energy vehicles are being sold. In the first half of 2018, nearly 500,000 new energy vehicles were sold in China, nearly doubling the year-on-year increase. On the other hand the electric car spontaneous combustion accidents occur frequently, all kinds of technology is not mature, quality is not qualified products directly to run on the road, like a time bomb would break out at any time, this is very dangerous, the safety of consumers is a blow to the development of new energy vehicles, so the new energy car companies need to do is to improve technology as soon as possible, improve vehicle safety. And those low level of technology, or even substandard and unreliable products of the car companies should also be someone to control. Finally, the rumors of the elimination of fuel vehicles have been dispelled, and there is still a long way to go for new energy electric vehicles. Recently, in a new energy car 4S shop in Beijing, a family of buyers surrounded sales manager Liu Li and kept asking questions they cared about. Now, when people buy new energy vehicles, the most asked questions are about the range, charging time, and whether it is good to charge in winter. Bass said.

Power lithium-ion batteries have become the benchmark for electric vehicle performance comparisons. However, many people do not understand that the key to the performance of lithium-ion batteries is the cathode material.

Cathode material is the most critical raw material for power lithium-ion batteries. Its performance directly determines the important performance indicators of lithium-ion batteries, accounting for more than 30% of the total cost. "Beijing Easpring Material Technology Co., Ltd. deputy general manager Chen Yanbin told reporters.

For a long time, the lack of high-performance cathode materials has been a pain point for the development of China's new energy vehicles and their power lithium-ion battery industry. As the technical founder of a listed company focusing on the research and development of lithium cathode materials in China, Yanbin Chen led the research and development team in 2014 to take the lead in the successful development and mass production of lithium cathode materials for vehicle power, which has four performance advantages, such as high specific capacity, long cycle life, high compaction density, and excellent low temperature performance. The energy density of the corresponding power lithium battery reaches 230Wh/kg, the cycle life reaches 4,000 times, and the low temperature charge-discharge performance is also outstanding. It has become the preferred cathode material for high-end electric vehicle power lithium ion batteries at home and abroad. The project won the second prize in the 2017 Beijing Science and Technology Award.

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