New energy vehicles will spontaneously ignite. Is there a safer lithium battery as the power?

Howell  |  Hits:21 second  |  2021-08-30  

Hello everyone, new energy vehicles will spontaneously ignite. There is a safer lithium battery as the power??


In recent years, the spontaneous combustion of new energy vehicles has occurred frequently, which makes the safety issue focused again. Safety is the bottom line that China's new energy vehicle development must maintain. The spontaneous combustion of new energy vehicles is enough to alarm the whole industry. With the influx of a large number of vehicle enterprises into new energy, safety has become the first cold water in the industry, which we must think calmly. The cases of spontaneous combustion of new energy vehicles are increasing significantly, which not only causes property and life safety, but also makes potential consumers feel uneasy. Among new energy vehicles, plug-in hybrid vehicles have less spontaneous combustion, and the proportion of pure electric vehicles is higher. The proportion of spontaneous combustion in "charging process" is nearly half, followed by "driving", and the proportion of "static spontaneous combustion" is the lowest.


No matter what form it is, it undoubtedly reveals the safety problem of new energy vehicles. According to the statistics of relevant national departments, there were more than 40 fire and spontaneous combustion incidents of new energy vehicles in 2018 alone,


As one of China's strategic emerging industries, the industrial scale and technical level of new energy vehicles have developed rapidly, and the sales volume has become a rapid upward trend.


The number of new energy vehicles in China has exceeded 1.6 million, accounting for nearly half of the global number of new energy vehicles. With the rapid growth of the number, the safety problem of new energy vehicles has become increasingly prominent, especially the fire and spontaneous combustion has attracted the attention of the majority of consumers.


Since it is an important issue related to life safety and personal property safety, how to prevent spontaneous combustion of new energy vehicles? Given that vehicle fire accidents may be related to electrical circuits, fuel cells, mechanical interference and external fire sources, and some evidence will disappear or change during combustion, Therefore, it is very difficult to investigate the cause of the incident. The cause analysis is extremely complex. According to some historical recall vehicle defects, the cause analysis is mostly motor failure, mechanical failure and line failure. On the contrary, the cause of failure caused by lithium battery itself is relatively small.


To solve these problems, circuit design is the root cause. New energy vehicles need to rely on the cooperation between batteries, generators and motors. For PHEV and HEV models, it also needs to be combined with the working conditions of the engine, so its control unit ECU will play a very important role. However, for some second and third tier brands, the technical accumulation and R & D capacity of electrification are relatively low, There are some design problems in its circuit. A complete battery pack includes battery management unit, cooling system and safety explosion-proof device, so the working logic of the circuit will directly affect the running state of the vehicle, and seriously lead to system disorder and spontaneous combustion.


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Is there safer energy as the power of new energy vehicles?


Dongguan Hongwei energy has been developing and producing batteries since 1999. In the field of R & D, there are indeed many new materials that are safer than lithium-ion batteries, such as Zinc-ion batteries, which have high stability, low explosion hazards, and the price is half that of lithium batteries. However, the two short boards of zinc ion battery limit its commercial application. On the one hand, the energy density of water-based zinc ion batteries is generally lower than that of non-water-based zinc ion batteries; On the other hand, in the process of charge and discharge, the zinc metal anode is easy to form zinc dendrites, resulting in internal short circuit of the battery.


Technically speaking, lithium-ion batteries are only the most mature lithium batteries that can be mass produced, and new breakthroughs are still being made. The performance of single lithium-ion battery has been significantly improved in energy density, power characteristics, safety and service life, and the temperature application range of the battery has also been expanded. With the continuous expansion of the research field of automotive lithium battery, its technology has also made rapid progress. At present, ternary (811) material lithium battery is used on new energy vehicles. It is also a high-capacity cathode material with excellent cycle performance, relatively good safety performance and high current discharge. It is suitable for medium-sized and high-grade electronic products or places requiring high current work, But the material is expensive. In addition, the production process is very strict with the process requirements, and it is difficult to control the consistency of different batches of products.


Although the new energy electric vehicle has some problems such as short journey and easy spontaneous combustion, it will be gradually transformed and improved in the future because it effectively solves the two major problems of carbon dioxide pollution and energy. The continuous development of new energy vehicle industry will promote the development of lithium-ion battery production. Once the battery technology of electric vehicles breaks through the market, the lithium-ion battery market can be said to be bright,


Do you think that new energy vehicles will spontaneous combustion and have safer lithium batteries as power? Any better ideas?


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