Last night 8 when, shanghai Xu collects Ou Yude inside garage of underground of village of beautiful garden of road peaceful heart, car of a tesla appears suddenly Bai Yan, then on fire burns, igneous situation returned disaster to reach meet with the other vehicle of anchor.
Tesla on fire is not news any more, s and motor-car of X series report produce the event of fire of of people of talent of spontaneous combustion or collision time and again in global limits.
On fire after all does the reason where? Small make up interviewed Shanghai the engineer king gentleman of company of production of batteries of the oldest electric car (alias) , after he watched video, think, the electric car batteries that this is a model heats up the accident that out of control turns to spread for heat.
What makes heat up out of control?
Heat up out of control, in short, the plant that protects batteries stability namely malfunctions, bring about batteries overheat on fire to burn.
The cause that causes hot out of control to happen is varied, batteries is filled too, the result that produces ageing of collision, batteries to be caused etc, it is all sorts of lithium battery spontaneous combustion that we often see, include a mobile telephone, charge treasure, dynamoelectric bicycle is waited a moment.
Photograph of car lithium battery is compared under the structure is more complex. It is with tesla exemple, a whole batteries model group is formed by 779 lithium battery, special design has segregation system to prevent to damage between batteries module expand. Look from video, this one system did not have effect apparently, on fire of a group of batteries causes chain-reacting ignition overall pattern group.
This is heat spreads.
In this accident, it is what reason brought about hot out of control after all, mr Wang says, real reason is found out very hard possibly.
In spaceflight domain, a term cries " clear " , sending unripe postaccident namely, want the condition when reductive accident produces measure, ability finds the solution from inside piling debris.
But in commercial commodity domain, very few can beautiful huge cost makes the investigation of this kind of level, this also is place of difficulty of investigation of electric car on fire.
But have a detail, caused the attention of Mr Wang, according to the car advocate say, just did before the accident " super charge " , fill cell with the shortest time be close to full report, regard a batteries as the expert, he extremely do not suggest electric car vehicle advocate go doing this to plant " super- fill " .
In electric car industry, have a paradox that breaks through hard at present.
It is a car no matter advocate still be an enterprise, hope the size of electric car batteries is larger and larger, charge rate is rapidder and rapidder, such ability run longly, rest shortly, motor-car letting report goes to the lavatory like car of true positive-appearing image use.
But the angle from the technology, this means the fall of security.
Use most general lithium ion cell now, had reached the limit almost on the mining of function.
Want to want to be broken through somewhat on function again, must sacrifice security.
Who will exceed the security that fills " to be in charge of for " ?
"Super- fill " the example that appearing is a model.
Tesla built on 1000 in the whole world at present super charge picket, the report of the half can be filled inside 30 minutes, be full of inside 80 minutes, and charge normally time is as long as many hours 10.
"A ten hours ability eats the meal that go down, you let a person be in 80 minutes inside forcibly satiate, affirmation should take be out of order, batteries also is this truth. Batteries also is this truth..
Mr Wang says, and whether can cause spontaneous combustion no matter, long-term " super- fill " affirmative meeting injures batteries, this is the technical compromise before commerce, the personage inside course of study expresses to suspect to this practice mostly.
But before market demand, such compromise still is continueing, besides tesla, a lot of electric motor-car manufacturers proclaim home will build super fill a power station, although this popularizes those who be helpful for electric car, but to the car advocate what favour is not for safety.
The plan that replace is not to do not have, one kind is called " battery of solid state lithium " the technology has been invented at present, of liquid lithium ion with interior batteries photograph is compared, its function, security all had bigger promotion.
But the problem is this one technology still does not have maturity at present, in commercialize apply go up to still very long way wants. From the point of current condition, lithium ion batteries shows the optimal choice of the sources of energy of electric still car.
On March 4, 2017, be located in tesla of Shanghai gold bridge super the accident of on fire of a Model S happening that fills a power station, the belt that link a car charges picket together by burn down, the car of on fire is undertaking namely " super- fill " later period.
After the event, below the invitation of custom, famous expert undertakes reconnaissance to the spot together inside Mr Wang and numerous course of study, everybody's point of view is unanimous: Do not go as far as possible " super- fill " .
"Super- fill " can be regarded as program of a kind of lash-up only, now and then use an issue not quite, and should notice " super- fill " cannot be full of, fill at most 60% can.
Can tesla still go far?
Although accident of electric car on fire happens time and again, but Mr Wang still thinks, not should one club gives whole industry " beat dead " .
Of evenhanded say, the pine that tesla uses issues lithium battery, control a system with the batteries of tesla, still be the most advanced on the world, it is the surveyor's pole that chases in succession inside course of study.
The pine that Model S uses issues batteries, according to the estimation inside course of study, fraction defective is controlled in a few PPM, a PPM is represented with 1/1000000, home in recent years batteries industry tries best to catch up, also did not reach this level temporarily.
Some earlier year, the accident that batteries of domestic report motor-car deflagrates is more, had reduced now many. According to the estimation inside course of study, the spontaneous combustion probability of electric nowadays car differs with fuel car actually very few.
Just came up against this " network red company " " net red car " , the every time on fire of tesla can ascend the world heat up search almost.
2018, the whole world sells gave 2 million electric cars, among them 1 million are in China, this profit from is advocated energetically at Chinese government energy-saving decrease a platoon, with the promotion of consciousness of public environmental protection.
Replace fuel car stage by stage with car of new energy resources, had been the world's accepted trend.
The issue that brings from this, it is electric car still does not calculate perfect technology, with the public to drop producing between security demand. This one fall, move in Chinese report the car is tall retain below the setting that quantity and attention spend, be magnified again and again.
Traditional car experienced development of about a hundred years to just have present stability, and of electric car large-scale commercialize, just began to have prospect of a solution in these a few years namely after all.
But no matter how, mr Wang still thinks, the security of electric car is forever the first. Watched this paragraph of video, his feeling is filled with apprehension, regard batteries of motor-car of a report as the engineer, do not let the responsibility that this kind of thing happening is them and obligation.
This spontaneous combustion, the responsibility nature of tesla runs to be not dropped, also ring noisy alarm bell to all practitioner at the same time, do not want eye be enchantinged by electric car agitation, safety should be the first consideration from beginning to end.
New Li Yineng of civilian eye atelier
Editor | Gong Lei
