Why lithium batteries into a “time bomb”
At 3:00 on August 24, 26-year-old French supermarket security Jassoud li Buadi are using their own 3 months ago to buy the iPhone send text messages, “Suddenly, the screen exploded!” Buadi eyes were a piece of broken glass scratch, he angrily made to Apple’s claims.
Buadi an iPhone is not the only victims of the bombing. Earlier this month, southern France, a 18-year-old’s iPhone “issued by squeak and burst,” which juvenile eye injury; Paris suburb of a 80-year-old’s iPhone mobile phone display a burst Why lithium batteries into a “time bomb” At 3:00 on August 24, 26-year-old French supermarket security Jassoud li Buadi are using their own 3 months ago to buy the iPhone send text messages, “Suddenly, the screen exploded!” Buadi eyes were a piece of broken glass scratch, he angrily made to Apple’s claims.
Buadi an iPhone is not the only victims of the bombing. Earlier this month, southern France, a 18-year-old’s iPhone “issued by squeak and burst,” which juvenile eye injury; Paris suburb of a 80-year-old’s iPhone mobile phone display a burst in his hands. According to French media, statistics, recently have been 10 French consumers to report their iPhone mobile phone display an explosion or rupture. dell inspiron 2200 battery Incident also occurred in the Netherlands, a man will leave iPhone in the car and returned to find iPhone has ignited the fire burned beyond recognition by the Deputy driver’s seat.
Occurred with the previous iPod, laptop computer, cell phone explosion is similar to Europe in the multiple bombings in iPhone, but also from the past 10 years has become a mainstream digital products lithium batteries overheating caused by the battery.
In March 1976, the U.S. oil company Exxon engineers Whittingham created the first prototype lithium batteries – he used titanium sulfide as an anode, lithium metal as cathode, rely on lithium-ion in the “positive – negative – positive,” movement between the formation of current, complete charge – discharge process. Lithium batteries in energy density, the degree of self-discharge of the indicators are much better than those for other rechargeable batteries, giving rise to the scientific community and business R & D boom. 80s of last century, people are constantly improving lithium batteries, such as the use of lithium-containing compounds as cathode, carbon materials as anode, making it smaller and more energy density, running more stable, cheaper, lithium battery so gradually to become the mainstream of rechargeable batteries, in particular, is reflected in the portable electronic devices, and even has been used to power electric vehicles.
Planting the seeds of electrolyte “missile”
According to the U.S. well-known science writer series dell e1405 battery of articles in the lithium batteries in the introduction, the vast majority of lithium battery explosion caused by a short circuit, and the specific reasons, including charging overvoltage / over-current use of aging.
Lithium battery manufacturing process, because the manufacturing process itself flawed, it is easy to be insulated in this between the two poles, leaving metal dust, copper foil, aluminum foil pieces. The angle is expected in the battery than the fever (more common in long-term use or charging), the like boiling water in a grain of rice, as in the electrolyte to make random thermal motion. If you happen to have the battery positive and negative particles or debris near the middle of the diaphragm level, it could create a divide perforation, triggering micro-short circuit. As the batteries are flammable organic electrolytes, micro-short-circuit may cause an explosion, burning and other accidents, generally have the following three cases:
1. Sparks ignited the electrolyte, and thus bring disaster to come into contact with plastic body and flammable, resulting in fire;
2. Was experiencing an increase of temperature caused by the battery, the battery inside the space is small, perhaps because of increased pressure to explode;
3. Slow temperature rise inside the battery, the battery case to melt gradually, so that corrosive electrolyte leakage.
Lithium battery safety problems can not stop now, dell xps m140 battery because then the advanced manufacturing technology, will inevitably lead to planting the seeds in the electrolyte “missile.” Should be noted that the formal sector of lithium battery production and sales have strict norms of acceptable quality lithium batteries, the number and size of debris have been controlled within a small, very low risk of perforation of diaphragm; batteries outside the Shell also used flame-retardant material, is not prone to fire
Article Source:http://www.articlesbase.com/direct-mail-articles/why-lithium-batteries-into-a-time-bomb-1274704.html
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