Speaking of Tesla's spontaneous combustion, there is actually only one reason, which must be related to the battery. It is different from our commonly used petroleum vehicles. As a representative of new energy vehicles, Tesla adopts lithium batteries as a new energy source, as long as it is charged, so the natural reason can only be lithium batteries.
Since Tesla went public, more than 5, new energy vehicles have been sold.
since 213, there have been 14 spontaneous combustion incidents in Tesla * * *, during which there was also an accident death incident in the United States. Most of the incidents were caused by car accidents, and it seems that the greater possibility is accidental factors at present.
Next, let's analyze the possibility of fire caused by lithium batteries:
1. The battery is short-circuited, which is the greatest possibility of fire in all batteries. Next, we can see from the picture that Tesla's battery is composed of thousands of small batteries. With the composition of ultra-high density batteries, the improved power density will be more sufficient, and the durability will be more sufficient. At the same time, the structure of small batteries will be more refined, and with the upgrading of battery technology, the storage capacity will be more sufficient.
because of this, the possibility of short circuit increases with the increase of the number of batteries.
2. Overcharging.
according to the owner, the owner charged the electricity for several hours before spontaneous combustion. Let's understand the structure and discharged principle of lithium batteries:
Lithium metal batteries are generally batteries that use manganese dioxide as the positive electrode material, lithium metal or its alloy metal as the negative electrode material, and use non-aqueous electrolyte solution.
discharge reaction: Li+MnO2 = LiMn2
generates electric energy through corresponding chemical reaction. However, if the sealing performance of laser welding is poor in the assembly process, the liquid will spontaneously ignite due to the heat generated while providing energy.
3. Contact spontaneous combustion of the positive and negative electrodes of the battery (similar to Samsung's battery spontaneous combustion accident)
The Samsung incident caused the collapse of Samsung's mobile phone in China, which led to the delisting storm. The third party organization also gave the reasons for the spontaneous combustion and explosion of Samsung's mobile phone.
A battery is squeezed in the upper right corner, resulting in short circuit;
battery b lacks the insulating tape on the tab, and the large bump of the welding point is easy to cause the insulation film to puncture, and the insulation film is too thin to cause short circuit.
these two reasons are also the reasons why lithium batteries usually have accidents, and Tesla's spontaneous combustion is also very likely to be the reason.