Close the report of spontaneous combustion of paragraph of motor-car of time concerned phone, high frequency rate appears on of all kinds media. "New car new technology " the incident of the spontaneous combustion of two electric cars that also reported tesla and colourful come early or late, although return the accident findings report that did not make clear, the number one that Dan Li batteries is now " suspect " . I am not to want today former to the fact by undertake guessing, want to tell the story of the batteries that tell lithium however, those who talk about it is dispute blame.
Before taletelling, be necessary to show lithium battery roughly first. For firm sense, we now the lithium battery in mobile phone, computer, electric car, should call lithium ionic batteries, because there is metallic lithium in batteries, put in lithium ion only.
When filling cell, lithium ion is taken off from positive electrode embed, embed through electrolyte negative pole, negative pole is in rich lithium condition; When discharge contrary. Can understand lithium ion into laborious worker, negative pole is their abode, positive electrode is working factory. The workers when charging are returned from the factory rest in the home; The factory is headed for to work from the home when discharge.
As to the structure of lithium ion batteries, resemble the steamed twisted roll that we eat daily a bit, made the same score face roll first, next above scatter on chopped green onion, coil it finally. Lithium ion batteries, most below it is a Copper Foil, a black lead is over, again upgrade is insulation layer, uppermost is lithium ion material.
Among them, copper Foil and black lead are negative pole, lithium ion material is positive electrode. Coiling these things like making steamed twisted roll next is batteries, still have a lot of detail among them of course, add electrolyte, electric agent, adhesive to wait a moment for instance, here not dilatancy. Anyhow, want to remember layer of positive electrode, insulation, negative pole only, this three-layer structure is OK.
Good, after the basic knowledge that understood lithium ion batteries, can enter subject. Though electric car is a strange thing now, but lithium ion batteries enters us to live a lot of years already, also had produced a lot of accidents among them. Among them most familiar to the ear can of detailed is SamSung Galaxy Note7 " explosive door " incident, this thing has ended now, and had specific accident reason -- the mobile phone designs blemish.
Batteries of ion of previous respecting lithium is layer of positive electrode, insulation, negative pole this three-layer structure, be isolated from among them the layer should be compared, negative pole slightly a few shorter, because want to leave the space with have certain to decorate,this is make part. Below whack, , negative pole is separated for certain, but if get outside force, or batteries is decorated unreasonable, so, negative pole produces a contact likely, it is short circuit, on fire next again.
The reverse side of Galaxy Note7 mobile phone is arc, be pressed very closely in the topmost batteries of arc, this increased the risk of short circuit. More bad is, batteries supplier changed when SamSung is producing Galaxy Note7, with the batteries that is him SamSung. And new battery should compare the batteries that designs formerly big little, this with respect to example not rich space is more cramped, have the state that can produce spontaneous combustion on fire carelessly a bit.
SamSung " explosive door " the biggest accident is, on October 5, 2016, american southwest aviation 994 airliners burn because of on fire of explosion of SamSung Galaxy Note7. Be Ied hope the plane still is in at that time the ground, did not cause personal casualty. After this, galaxy Note7 is allowed to take a plane no longer.
994 airliners are lucky, when producing fire, it is absent the sky, and transport company of American combination package (UPS) 6 flights are done not have so lucky. On September 3, 2010, a Boeing that is fully loaded with goods 747 cargo aircraft, cong Di is done obeisance to before taking off, go to division grand. Just take off 20 minutes, smoke discovered inside cab, after that smoke is thicker and thicker. Although rescue of do all one can of two air man, especially deputy drive, be poured by smother choke in pilot, communication not the visibility inside free, cockpit is almost 0, below the circumstance of invalidation of multinomial control system, try to drive as before plane crash. Regretful is the plane still is pulling smother finally, plunge into directly to the ground, survive without the person.
The prime criminal of this aviation accident is the lithium ion inside goods storehouse batteries, they produced explosion. Although there is fire prevention measure inside 747 goods storehouse, temperature of upblaze of batteries of Dan Li ion is extremely high and violent, the instant broke through fire prevention layer, cause an aircraft multinomial hold accuse systematic be no longer in force. After this has aviation accident, lithium ion batteries was included dangerous moral to list, need is carried with tailor-made goods storehouse. So far, batteries express is in lithium ion home still cannot airborne.
It is actually in the life, we often also are heard charge the batteries flaming news such as treasure, mobile phone, no matter short circuit is caused, still charge caused, showing lithium ion cell at least is combustible article.
Write finally
As to present electric motor-car, to consumer, besides the consideration practical besides, the security of lithium ion batteries must bring into consideration limits. To electric car manufacturer, need perfects batteries management system, once short-circuit other perhaps risk, want methodical processor to make. To market control person, need from before in the accident of lithium ion batteries, summary gives a perfect standard.
