Dell and Apple recalls this incident is not the first time the EX942AA battery to overheat, nor is it the first computer makers to recall batteries. Although the vendors together in this rapidly that it was not a wide range of industry issues, but that is not the case. Have reason to ask the question: This is some sort of unusual things, or will as more and more battery-powered devices to enter the market to become an industry trend?
Most modern battery-powered equipment manufacturers facing a hard choice. On the one hand, users expect that these devices can run continuously for several hours, they want their laptop to run at least 4-5 hours, much higher than two years ago, an average of 2-3 hours of run time. However, the pace of development of battery technology can not be with the "hardware development Laptop Battery curve" to keep pace. In fact, the battery power of an annual increase of only 5% to 10%, far lower than the processor performance an average of 18 to 24 months increased by several times the speed. Users need to be more smaller, lighter equipment, while nearly all batteries in portable devices (especially laptops) and the total volume and weight accounted for a large proportion.
In addition, more and more impatient users need the equipment to quickly run up a fast recharge time, which need to enter the high-power electric battery charger, thus increasing the heat, limiting the battery life (battery life up to only a 250 or 300 times charge cycle). Some new EV087AA battery technologies (such as fuel cells) may change this situation, but at least 3 to 5 years, in the economic and technology, such technology does not yet have the possibility to meet the needs of the mass market.
Portable systems (not just laptops, but also handhelds, cell phones and music players) in the device designers must be the size and weight and battery life, charge time, power supply size / weight, the total power density / heat, of course, the cost of make a compromise between facing the risk of overheating is not the only battery. People already know the power (small "brick-style" charger) also has a fire risk.
In addition, vendors are not always fully tested with their brand of equipment. For the smaller brands for consumers and equipment in Pavilion dv9000(hp dv9000 battery) particular. Few companies on the portable devices (including not only laptops but also includes smart phones) Procurement of adequate power / temperature / life-cycle test.
Dell and Apple recalled nearly six million laptop batteries concerned, so that high-tech industry has long been the dirty secret of exposure - for our portable machines, wireless phones, iPod and digital camera batteries to provide electricity is a potential arson committed.
Since the early 90s of last century, lithium replacing nickel-cadmium and other materials are widely used to produce a variety of electronic devices used in the battery. Smaller, lighter lithium batteries it is being used to drive more and more, increasingly demanding electronic 396008-001 devices, such as high-resolution screen laptop configuration. The widely used lithium batteries led to a revolution in portable electronic products, it will a lot of energy concentrated in a very small space. However, if they are over-charging, or there is such as short-circuit fault, sealed batteries waiting to ignite chemical substances will become explosive combustion.
Lithium is a when exposed to air will immediately burn and the water exploded in the face of the metal. But, surprisingly, is that lithium has nothing to do with the battery caught fire because of lithium metal are not usually the form of its instability, danger is a chemical reaction produces current release of hydrogen. If the battery is overheating, hydrogen will be in a dangerous chemical fire in 395789-001 combination with the organic solvents, this chemical fire could be restrained but depleted in hydrogen and fuel will not be put out before.
Despite the inherent risks, but lithium batteries will not go away anytime soon, because now there is no good alternative technologies. However, the risk of fire would give the companies involved in the recall beyond the financial losses caused by the impact, one of which we seek to increase the HSTNN-DB20 battery efficiency reached the dead end, because without some major chemical breakthrough, greater power density can cause unacceptable risk.
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