Urgent affairs! Should strengthen safety of passivity of battery of electric car lithium to defend
-- visit Jian Peng of automobile industry expert
Jian Peng
Assume office to sell a company at China of Wo Erwo car early or late, run quickly Motor Corporation of lotus of company of Chinese car sale, England, the automobile industry that having 20 years from already check, plant of familiar car main engine sells management, know agency operation. Ever held the post of vice director of committee of experts of industry of automobile of association of Chinese quality inspection, participate in and promote automobile industry of relevant code carry out. Pursue development of technology of new energy industry now, offer batteries complete lifecycle to manage a solution for industry client, the application of promotion new material, new technology, new technology and new product in field of new energy resources.
Recently, as hair of frequency of incident of electric car spontaneous combustion, and experience trouble firm 3 close its mouth, look forward to of car of Yi Xiangshe thing gave out channel of car of network of Chinese quality news to cover case (detailed sees " since spontaneous combustion magpie, is deal with problems arising from an accident faint? " ) .
However, very regretful is, enterprise of 3 experience thing all did not make clear answer, we can see tesla is in only " push special " on issuance statement, and of Biyadi's follow the lead of lift, in the statement that publishs on Guan Bo. Statement all states spontaneous combustion reason still yets to be investigated bright, announce findings as to when, the public unknown.
In policy push aid below, began electric car to be shown in Chinese market last year erupt the growth of type, according to not complete count, our country each type is dynamoelectric car (contain motor-car of low speed report, 2 rounds reach a motor tricycle) retain the quantity already exceeded 200 million, and the fire that causes every year as a result of on fire of batteries of of all kinds and electric car is controlled in 1.5 million, media exposes to the sun recently the accident of spontaneous combustion of pure electric car that go out is typical delegate merely. Those who confront a company is silent, " network of Chinese quality news " car channel interviewed Jian Peng of automobile industry expert.
At the beginning of interviewing, jian Peng took out a group to detect independently by tripartite the orgnaization does detect data: "From the point of our experimental result, had been in fill condition to fall, the temperature when imitate batteries group heats up out of control can achieve 800 ℃ above, enough burns dissolve aluminium to make batteries encrust is aluminium makes automobile body even. And because combustion is chemical reaction, energy instant is released, go very hard with groovy method rush to save life and property. That is to say, if car is passive,preventive measure does not reach the designated position, once lithium battery produces upblaze of hot out of control to make a person deadly and same with respect to enough like electric energy instant. But, today we who can leave report? It who because get an electric shock,is met again is dangerous to have who because get an electric shock,is met again the common sense that this kind of pupil knows and reject to use phone? So how should the road of security of Chinese electric car go? So how should the road of security of Chinese electric car go??
From electric car the angle of long-term development looks, jian Peng thinks: Set out from strategy of national energy resources, develop car of new energy resources energetically, drive the car with precondition of dynamoelectric melt into then " new 4 change " development, the development of electric car cannot give up eating for fear of choking-refrain from doing sth necessary for fear of a slight risk, want to seek the means that solves a problem actively however.
Frequency of electric car problem is sent, market characteristic cannot be ignored
Jian Peng analysed the reason that frequency of accident of electric car spontaneous combustion sends, he says: "Closely related relation of current situation of market of electric car of this and our country: Direct with policy for impulsion, our country has made current world growth is the rapiddest and retain the electric car market with the largest amount. To cater to the allowance policy of constant change, inevitable in process of car research and development, production meeting puts manufacturing company in a lot of not immature, perfect places, the product is accepted without enough time many, strict, scientific test appears on the market hurriedly, so that many electric cars are solid,be ' transitional product ' . Because involve the form a complete set of 3 report to supply a system to just be built in home, and car manufacturer for can utmost ground gets allowance to undertake often upgrading to car, this also is brought about part of city carry out is at present dynamoelectric issue of car product consistency is more outstanding. Although build car new power not less to hope to make the favorite of a dark horse of industry, capital, overturn to create pattern of vehicle concept, production traditionally, but do not forget, no matter how modelling is fashionable, interior trim how cruel dazzles, but the essence of the car still is vehicle. Traditional car company is to be based on the experience of a few years that build a car to accumulate ability to enter electric car field, and it is on thin ice as before, go before discretion. But ground of fearless, press forward with indomitable will develops burgeoning business advanced face, code publishs the lag development at the times related together with industry, bring about inside period of time the standard is short of break, this also gives electric car frequent spontaneous combustion bury played hidden trouble.
On January 10, 2019, the branch such as industry letter ministry already will " electric car uses lithium ion dynamical accumulator safety asks " show formally to grandfather as compulsive standard, this adumbrative this one safety asks to come on stage soon. This action is in fill our country the blank of relative standard of field of safety of cell of electric car power. From policy, on the development belt that our country will be domain of safety of battery of electric car lithium " the Incantation of the Golden hoop " .
Batteries interior has a mystery, it is more important that passivity defends
How does congenital problem solve battery of lithium of motivation of so electric car effectively? Jian roc answer says: "Run a system from batteries above all (BMS) in light of, like this one system existence designs blemish or protective mechanism is diseased, hot invalidation appears to undertake shifting to an earlier date intervening in cannot using a process to batteries, very possible meeting causes a series of chain reaction. Next, be store can the metal of material of corporeal upper reaches remains, the metallic impurity of these remain may be put with spinal shape stay at batteries interior, as time passes will be piercing its are in-house and diaphragmatic, cause batteries interior local short circuit. Additionally batteries interior fills discharge hind for long in experience, its are mineral produce dendritic crystallization. And body of this kind of crystallization also is met piercing batteries interior is diaphragmatic, cause cell local short circuit, the risk of batteries spontaneous combustion increases greatly. Finally, at present business of each power cell is density of promotion batteries energy, the applied scale of battery of 3 yuan of lithium rises greatly. Nickel, cobaltic, manganese in 3 kinds of material, the scale of nickel promotes greatly, even certain now manufacturer already increased the proportion of nickel 80% ! This also causes cell initiative in working process hot phenomenon is apparent, if cannot come loose in time,heat up, bring about batteries spontaneous combustion very likely also. Bring about batteries spontaneous combustion very likely also..
Eliminate batteries to heat up invalidation risk through undertaking improvement coming to batteries material, workmanship, at present of short duration does not have specific solution. But defend from batteries passivity angle, jian Peng gave out relevant proposal: Above all, since the spontaneous combustion of electric car is inevitable probability incident, should think how to let batteries monomer spontaneous combustion so and should not affect bag of whole power cell. Through be in group of model of batteries monomer, batteries or batteries bag surface uses adiabatic block to light material to undertake enclosing, command the to outside ambient influence when batteries burns, batteries or the exterior temperature control that batteries includes is in reasonable temperature interval, flee for his life for personnel, rescuing gain time of belongings move and fire control.
In addition, apply " gas gel " undertaking to traditional heat-insulating material function promotes is current accepted heat insolation is flame retardant the solution with best effect, can cut off effectively batteries spontaneous combustion is right truckload influence.
"What is gas gel? Be the glue with a kind of special glue? " we ask curiously, jian roc explanation says: "Gas gel is the lightest solid body on the world! In Aerogel was being used when just be being translated ' Gel ' one word is transliterated ' glue ' . " the material that Jian Peng introduced to enrage gel to us subsequently is characteristic. Above all, diameter of grain of this kind of material is between 30-1000 μ M, density is 10kg/m3 only, , 1% be water density, apply this kind of material to protect batteries to won't add tare weight substantially. And as a result of its raw material is 2 oxidation silicon, can get in sand, its cost also the improvement as preparation craft and material gain ground to be reduced further. This kind of material is in reason the applied foreground it may be said that dynamical cell passivity protects a domain a light.
Material of gel of gas of 2 oxidation silicon (the picture results from network)
The public needs the fact, public opinion should guide correctly
Promote electric car development energetically in national industry policy when the mouth, frequency of incident of electric car spontaneous combustion is sent, relevant car manufacturer is evasive public doubt, 3 close its mouth, the public is unidentified the truth, because jealousy caused a series of incorrect acknowledge to electric car,bring about the public finally, this will be gone against promote industry of our country electric automobile benign development. It is with tesla exemple, after tesla Model S is natural, the official statement of manufacturer is endless and detailed, also affected public seeing and hearing. Well-known, the 3 cable system of tesla is very advanced, but its passivity protects a mechanism be short of break expose through accident of this spontaneous combustion come out. And because of,the model of homebred Model 3 that rolls out soon can be denied homebred brief compound the problem such as 3 cable system, what because its maintain,can covert is silent and cause the public suspicious. If tesla is about to face up to,listen, answer to be accumulated with its abundant technology actual strength and experience, take an active part in our country or international to go up of relevant and dynamoelectric Motor Vehicle Safety Standard in making the work.
Additional, insurance company is cast in the light of electric car protect spontaneous combustion danger and its manage compensate to be on the hedge this, also be current exposed issue is exposed in accident of electric car spontaneous combustion, and " electric car uses safety of accumulator of lithium ion motivation to ask " come on stage soon, or will turn round this one situation from policy angle.
What interviewing is final, jian Peng hints we, reduce probability of electric car spontaneous combustion, need promotes industry whole technology the standard, at the same time of industrial policy the key that guiding correctly also is existing state of affairs of development of change China electric car. Like market of our country electric car this two respects get clear improvement, so this one domain will step a brand-new level.
Afterword
On May 2, the accident reason that colourful will come to also announce the ES8 in Xi'an spontaneous combustion -- this car batteries once had sufferred collision before this, caused batteries spontaneous combustion secondhand thereby. This also confirm the Jian Peng before this defends to the aluminous carapace of batteries model group the mechanism is short of break, give batteries spontaneous combustion the tremendous effect that cause. In the meantime, the branch also is paying close attention to problem of electric car security all the time related the government, this year on March 18, website of government of total bureau of national market supervisory government was released " the announcement that the market superintends total bureau general office to manage about enhancing recall of product of car of new energy resources further " (city inspect cases character [date of 2019] 531) , content points to out to rose on March 18, every is sold in home (include homebred with the entrance) electric car produces the relevant accident such as traffic collision, fire on Chinese market, should according to " regulation of recall of blemish car product " dozenth a regulation, organize investigation analysis instantly, supervise administrative total bureau to national market (quality development bureau) report investigation analyses a result. Together with comes on stage soon " electric car uses safety of accumulator of lithium ion motivation to ask " , from policy angle, industry of cell of electric car power or will get strong and benign guiding, the electric car happening as a result of incident of dynamical cell spontaneous combustion probability, or will reduce substantially.
The character edits / 8 rain
Art edits / Shui Chuan
Origin / network of Chinese quality news
