Samsung’s massive global recall of the lithium battery has yet again focused attention in the hazards of lithium ion batteries-specifically, the potential health risks of lithium ion batteries exploding. Samsung first announced the recall on Sept. 2, and only weekly later it took the extraordinary step of asking customers to immediately power along the phones and exchange them for replacements. The Government Aviation Administration issued a powerful advisory asking passengers not to take advantage of the Note 7 as well as stow it in checked baggage. Airlines all over the world hastened to ban in-flight use and charging of the device.
Lithium rechargeable batteries are ubiquitous and, thankfully, the vast majority work all right. These are industry’s favored power source for wireless applications due to their very long run times. One can use them in everything from power tools to e-cigarettes to Apple’s new wireless earbuds. And most of the time, consumers drive them with no consideration. In many ways, this battery may be the ultimate technological black box. Many are bundled into applications and are not generally accessible for retail sale. Accordingly, the technology is basically away from sight and away from mind, plus it will not obtain the credit it deserves being an enabler in the mobile computing revolution. Indeed, the lithium rechargeable battery is as vital as the miniaturized microprocessor in this connection. It may well a day modify the face of automobile transport being a power source for electric vehicles.
So it will be impossible to imagine modern life without lithium ion power. But society has gotten a calculated risk in proliferating it. Scientists, engineers, and corporate planners long ago made a Faustian bargain with chemistry whenever they created this technology, whose origins date on the mid-1970s. Some variants use highly energetic but very volatile materials that require carefully engineered control systems. Generally, these systems serve as intended. Sometimes, though, the lithium genie gets out of your bottle, with potentially catastrophic consequences.
Such a thing happens more regularly than it might seem. Considering that the late 1990s and early 2000s, there has been a drum roll of product safety warnings and recalls of energy power battery which may have burned or blown up practically every type of wireless application, including cameras, notebooks, hoverboards, vaporizers, and today smartphones. More ominously, lithium batteries have burned in commercial jet aircraft, a likely element in a minimum of one major fatal crash, an incident that prompted the FAA to issue a recommendation restricting their bulk carriage on passenger flights during 2010. During the early 2016, the International Civil Aviation Organization banned outright the shipment of lithium ion batteries as cargo on passenger aircraft.
And so the Galaxy Note 7 fiasco is not only a tale of how Samsung botched the rollout from the latest weapon within the smartphone wars. It’s a narrative concerning the nature of innovation inside the postindustrial era, one that highlights the unintended consequences of the i . t . revolution and globalization throughout the last 30 years.
Essentially, the real difference between a handy lithium battery along with an incendiary anybody can be boiled down to three things: how industry manufactures these units, the way it integrates them to the applications they power, and the way users treat their battery-containing appliances. When a lithium rechargeable discharges, lithium ions layered onto the negative electrode or anode (typically made from graphite) lose electrons, which enter into an external circuit to do useful work. The ions then migrate via a conductive material referred to as an electrolyte (usually an organic solvent) and become lodged in spaces from the positive electrode or cathode, a layered oxide structure.
There are a number of lithium battery chemistries, and several tend to be more stable than others. Some, like lithium cobalt oxide, a common formula in consumer electronics, are very flammable. When such variants do ignite, the end result can be a blaze that can be hard to extinguish owing to the battery’s self-contained flow of oxidant.
To ensure such tetchy mixtures remain under control, battery manufacturing requires exacting quality control. Sony learned this lesson when it pioneered lithium rechargeable battery technology inside the late 1980s. Initially, the chemical process the organization utilized to have the cathode material (lithium cobalt oxide) produced an extremely fine powder, the granules which possessed a high area. That increased the potential risk of fire, so Sony was required to invent an operation to coarsen the particles.
Yet another complication is lithium ion batteries have lots of failure modes. Recharging too fast or an excessive amount of may cause lithium ions to plate out unevenly around the anode, creating growths called dendrites which may bridge the electrodes and result in a short circuit. Short circuits can also be induced by physically damaging a battery, or improperly disposing of it, or simply just putting it in to a pocket containing metal coins. Heat, whether internal or ambient, may cause the flammable electrolyte to generate gases that could react uncontrollably with some other battery materials. This is called thermal runaway and is virtually impossible to stop once initiated.
So lithium ion batteries needs to be built with numerous security features, including current interrupters and gas vent mechanisms. The standard such feature may be the separator, a polymer membrane that prevents the electrodes from contacting the other person and building a short circuit that would direct energy to the electrolyte. Separators also inhibit dendrites, while offering minimal effectiveness against ionic transport. Simply speaking, the separator will be the last brand of defense against thermal runaway. Some larger multicell batteries, for example the types utilized in electric vehicles, isolate individual cells to contain failures and employ elaborate and costly cooling and thermal management systems.
Some authorities ascribe Samsung’s battery crisis to issues with separators. Samsung officials appeared to hint that this can be the truth whenever they indicated that a manufacturing flaw had led the negative and positive electrodes to contact one another. Whether or not the separator is in fact in the wrong is not yet known.
At any rate, it is actually revealing that for Samsung, the catch is entirely the battery, not the smartphone. The implication is the fact that better quality control will solve the problem. Certainly it would help. Although the manufacturing of commodity electronics is way too complex for there to become a straightforward solution here. There has always been an organizational, cultural, and intellectual gulf between those who create batteries and those that create electronics, inhibiting manufacturers from thinking of applications and batteries as holistic systems. This estrangement has become further accentuated by the offshoring and outsourcing of industrial research, development, and manufacturing, a consequence of the competitive pressures of globalization.
The outcome is a huge protracted consumer product safety crisis. In the late 1990s and early 2000s, notebook designers introduced faster processors that generated more heat and required more power. The most basic and cheapest technique for designers of lithium cells to satisfy this demand was to thin out separators to create room for further reactive material, creating thermal management problems and narrowed margins of safety.
Economic pressures further eroded these margins. In the 1990s, the rechargeable lithium battery sector was a highly competitive, low-margin industry dominated by a number of firms based mainly in Japan. From around 2000, these firms started to move manufacturing to South Korea and China in operations initially plagued by extensive bugs and high cell scrap rates.
Every one of these factors played a role within the notebook battery fire crisis of 2006. Numerous incidents prompted the greatest recalls in consumer electronics history to this date, involving some 9.6 million batteries made by Sony. The company ascribed the problem to faulty manufacturing that had contaminated cells with microscopic shards of metal. Establishing quality control might be a tall order so long as original equipment manufacturers disperse supply chains and outsource production.
Another issue is makers of applications like notebooks and smartphones may well not necessarily learn how to properly integrate outsourced lithium cells into safe battery packs and applications. Sony hinted all the in the 2006 crisis. While admitting its quality control woes, the business suggested that some notebook manufacturers were improperly charging its batteries, noting that battery configuration, thermal management, and charging protocols varied all over the industry.
My analysis of U.S. Consumer Product Safety Commission recalls during those times (to become published in Technology & Culture in January 2017) implies that there might have been some truth to the. Nearly 1 / 2 of the recalled batteries (4.2 million) in 2006 were for notebooks made by Dell, an organization whose business structure was based upon integrating cheap outsourced parts and minimizing in-house R&D costs. In August 2006, the brand new York Times cited a former Dell employee who claimed the 02dexspky had suppressed numerous incidents of catastrophic battery failures dating to 2002. As opposed, relatively few reported incidents in those days involved Sony batteries in Sony computers.
In a sense, then, the lithium ion battery fires are largely a results of the way you have structured our society. We still don’t have uniform safety protocols for numerous types of problems relating to 3.7v lithium ion battery, including transporting and getting rid of them and safely rescuing passengers from accidents involving electric cars powered by them. Such measures badly trail the drive to seek greater convenience, and profit, in electronics and electric automobiles. The hunt for more power and better voltage is straining the physical limits of lithium ion batteries, where there are few technologies less forgiving in the chaotically single-minded method by which people are increasingly making their way worldwide. Scientists work on safer alternatives, but we must expect a lot more unpleasant surprises in the existing technology within the interim.