"Dell to recall" the incident sparked global concerns about the safety of lithium batteries - cell phones, "not a time bomb"?
Dell emergency a week ago in the global recall of 4.1 million of "fire risk" of the notebook computer lithium-ion battery, the move triggered a global lithium-ion battery for security concerns. Now, to stay away from such a dangerous fire is almost impossible, notebook computers, mobile phones, digital cameras, music player ... ... More and more consumer electronics have relied "live." Can we say that we will be with stars "is not a time bomb" heavy? For this concern, the CAS Shanghai Institute of Microsystem and Information Technology Research Institute researcher, ThinkPad R61 Battery experts Baojia summer in an interview with reporters yesterday, said that the lithium batteries in the "exceptional circumstances" did exist under the security risks of fire. However, "the probability of cell phone burned hair is much lower than the risk of road crashes." As long as the correct production and use, consumers do not have to live in fear completely.
Short circuit, overheating, high probability of fire
The information age, people want to have portable electronic products, to boot, and prolonged use at all times. Thus, the 20th century, early 90's, lithium-ion batteries because of their smaller size, lighter weight, can be used longer and begin to replace the nickel-metal hydride and nickel cadmium batteries.
Just as people were getting used to a lithium-ion battery to accompany the way of life, they have to face the possible fire hazard. XIA Bao-jia told reporters that the risk from the internal lithium-ion battery. In brief, the battery from the positive "Lithium cobalt" and negative "graphite," composed by the divide separating the middle, surrounded by similar alcohol is a flammable liquid and lithium salt electrolyte. In other words, in the thin layer of small panels, the contains a variety of flammable substances, in the event of short circuit, overheating and other exceptional circumstances, there is the possibility ThinkPad R61e Battery, ThinkPad R61i Battery of fire.
In the fully charged state, the loss of most of the positive electrode for lithium-ion will become very unstable, if the internal battery temperature increases, the cathode is not more "law-abiding", the discharge temperature becomes higher. With the constant heat savings occurs scientists call "thermal runaway" phenomenon.
To ensure safety, experts advice 4:00
XIA Bao-jia told reporters that in the same technical conditions, in the same size solar energy stored in the more stable will be the worse battery "thermal runaway" the greater the risk. At the same time, if the number of pieces of single batteries in series to use, the risk will be more than just a single cell. Laptop battery usually 3-4 monomers comprising battery, electric bicycle batteries from 7 or 10 cells are connected in series, and the future of electric vehicles will be 46 or even 92 batteries to provide power, all of the safety performance of the ThinkPad T61 Battery put forward higher requirements.
In order to ensure the safe use of the summer security Gui 4:00 to consumer advice:
First, when the battery temperature exceeds 55 ℃, will greatly increase the probability of fire. Therefore, in the case of poor heat dissipation, not long sustained the use of electronic products;
Second, as far as possible to avoid sharp bumps, vibration environment with a lithium ThinkPad T61p Battery using the electronic equipment, internal battery, "restless" factor can not stand this torment;
Third, matching selection and battery chargers, a mix of different batteries and chargers manufacturers may increase the use of dangerous;
Fourth, the formal selection of manufacturers of products, not to use old and new batteries in series.
In addition to the need for consumers to pay more attention to the use of, scientists are trying to use innovative solutions to this paradox. For example, lithium ThinkPad X61s Battery iron phosphate, such as a more stable alternative cathode materials, "Lithium cobalt", or flammable electrolyte plus point "seasoning" - such as flame retardants in order to prevent unsafe reaction within the battery.
Lithium batteries deflagration new regulations call for regulation of transport
Recently, Dell notebook computer batteries because lithium deflagration incident forced to recall products, which in the industry caused a great shock. Province of Suzhou, Wuxi area is the world's largest notebook Li-ion battery production base, exported large quantities, particularly the safety issues of concern, therefore. Through an interview with reporters that the current production of notebook computers in our province lithium batteries do not deflagration accident reports, however, as a result of convergence-related issues such as laws and regulations, our province notebook lithium batteries used in export packaging and transportation are still some security hidden.
It is understood that the world's top four manufacturers of the notebook lithium batteries have been in Suzhou, Wuxi, set up a production plant, the region's annual notebook shipments of lithium batteries have accounted for 60% of the world's 50, only the first seven wujiang on exports of 8.25 million lithium batteries, the value of 107 million U.S. dollars, of which 90% of the notebook lithium batteries used. Although lithium batteries in our province there is no occurrence of deflagration accident reports, but according to one industry source, lithium battery manufacturers have been more or less of such incidents, but due to the occurrence in the factory, not just the outside world know .
Wu Jiang, director of Inspection and Quarantine Laboratory Battery Song Yang told reporters that since the birth of lithium batteries from the date of its manufacture, storage and transportation, the use of the process associated with the various safety accidents, especially during transportation accidents. According to incomplete statistics, since 1991, only 60 occurred in the United States lithium batteries from the air caused by fire, the U.S. Federal Aviation Administration in the past decade has been due to the transport of lithium batteries out of the amount of 517,000 U.S. dollars 49 tickets.
Wujiang Inspection and Quarantine is responsible for the packaging of dangerous goods of animal and plant inspection Wei Gu Zheng-Deputy Chief of food, told reporters, because there is a big lithium battery transportation security risks, so many countries, increased supervision. In transport, packaging, the International Civil Aviation Organization (ICAO) and the International Maritime Organization (IMO) as the lithium batteries will not only deal with dangerous goods, and the "assembly of the equipment lithium batteries / group" and "packaging equipment together with lithium cell / group "to deal with as dangerous goods. It is understood that the domestic lithium battery as an independent exports, the manufacturing enterprises in accordance with relevant laws and regulations can be used to identify the packaging of dangerous goods declaration as to the identification of dangerous goods in accordance with the requirements of lithium battery packaging and transportation. However, this laptop battery products including lithium, many enterprises in the export of dangerous goods have not been identified to declare the use of packaging, but as a general cargo packaging and transport, which not only violates the "Import and Export Commodity Inspection Law" and its implementation Ordinance and also led to greater security risks. Often result in serious accidents because the culprit is a class of products after this.
This reporter learned that, resulting in an important reason for this phenomenon is the convergence of laws and regulations not in place. In accordance with the "Inspection Act" and relevant provisions of the classification of export commodities, including exports of lithium batteries should also be accepted as legal identification of dangerous goods. However, exports of China's customs classification used is the HS code, there is no need for such products issued by commodity inspection agencies directly export declaration. This difference, often caused by lithium batteries with exports from the supervision of inspection and quarantine institutions. In addition, with the rapid development of science and technology, and the edge of an endless stream of electronic products, and its lithium battery is attached to the ever-changing, last year the Shanghai Hongqiao and Pudong International Airport transport two lithium batteries have model number of 5000 specification , and the majority of self-producing areas in southern Jiangsu Province, the complexity of products brought to the monitoring very difficult.
It is understood that China's relevant departments are making the development of relevant management Canon BP-511, Canon NB-4L, laws and regulations to fill the gap formed between. Will the new management approach with all lithium batteries and lithium batteries are included in the export products of the scope of the statutory identification to be dropped in accordance with relevant standards, impact, shock, short circuit, temperature cycling experiments and other projects to ensure that transport, use of safety .
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