Lithium batteries are not safe. Lithium batteries will also have a chance of explosion, but the odds will not be so high, it can also be said that all batteries are not safe, there is a risk, and according to information, lithium batteries, although the chance of explosion is very small, but lithium batteries have a higher risk of spontaneous combustion. In fact, excellent regular high-quality lithium battery brands, in every aspect of lithium battery production have done their homework, from the core, external structure, the entire battery pack, as well as to the entire vehicle system, have a set of meticulous safety design system, manufacturers in the product before the factory has minimized the risk, to eliminate the occurrence of any potential safety hazards.

Electric car lithium batteries are still relatively safe under normal circumstances. The lithium battery itself is not so dangerous, just because there is a need for lithium battery protection system in use, and then use to avoid high temperatures, violent impacts and other accidents. Comparatively speaking, the lithium battery protection of electric vehicles is very strict.

Compared to the complex structure of traditional fuel vehicles, electric vehicles fire is a single cause, basically due to thermal runaway lithium batteries. Smoke, fire and even explosion caused by thermal runaway is the most common feature of lithium-ion battery accident process. And thermal runaway is mainly due to overcharging, external forces, internal short circuit and other factors.

As the power batteries used in electric vehicles nowadays are composed of a large number of lithium-ion battery packs, and in the case of Tesla, for example, the whole set of power batteries is very large and is placed on the chassis. This makes it easy for the battery pack to be squeezed when the vehicle is in a collision, which leads to damage such as deformation, cracking, short circuit and other damage to the battery, triggering thermal runaway.

The most terrible thing is that a battery thermal runaway is likely to trigger a chain reaction, through the heat caused by other batteries also produce thermal runaway.

How lithium-ion batteries work:

Lithium-ion batteries use carbon material as the negative electrode and lithium-containing compounds as the positive electrode (depending on the positive electrode compound, common lithium-ion batteries include lithium cobaltate, lithium manganate, lithium iron phosphate, lithium ternary, etc.).

There is a diaphragm in the middle to avoid short-circuiting the positive and negative electrodes. During the charging and discharging process, Li+ goes back and forth between the positive and negative electrodes: when charging, lithium ions are de-embedded from the positive electrode and embedded in the negative electrode through the electrolyte; the opposite is true when discharging. In the process of embedding and de-embedding of lithium ions, accompanied by the embedding and de-embedding of equivalent electrons, which also generates a current.

The lower the education, the more unsafe lithium batteries, you see on the market now there are a few things that use electricity do not use lithium batteries, the country more than a billion electric cars, a year can burn a few, there are hundreds of millions of cars a day or even an hour out of the car accident more than not? Because of the guidance of the propaganda organizations feel that lithium batteries are not safe? Do not say that the regular manufacturers assembled out of the safety standards of the battery, is to buy their own large single, good connection insulation and waterproof battery, as long as the battery itself is not a problem, it will not be a problem, according to the battery performance parameters on the use of the line, only a few dozen volts of the thing, electric cars are now three to four hundred volts of batteries, and now which is not lithium-ion electric car batteries?

The original production of electric cars, is after relevant testing, should be safe. If it is self-replacing lithium batteries, the quality is uneven, it is difficult to guarantee.