Samsung has suspended its Note 7 because of reports of battery explosions, and it is worth noting that the Note7 uses lithium batteries, and the reason why lithium-ion batteries are ideal for mobile devices is the automatic battery reaction factor, the same one that caused the explosion!
Here's a scientific explain to us (Jake Port).
On October 5, 2016, a Southwest Airlines flight in the Baltimore area was evacuated from the departure gate at Louisville Airport in Kentucky, caused by a fire on the Samsung Galaxy Note7 due to the heat of a lithium-ion battery.
This is not a single incident, as there are more than 90 reports in the United States alone about the fire of the Note 7 devices while they are being shipped or used, prompting Samsung to recall their product globally.
In fact, Samsung phones aren't the only devices at risk, as any device with a lithium-ion battery can be the same.
Some postal services include these batteries as a dangerous or prohibited item, and air charging is denied to any device containing a lithium battery such as laptops and hoverboards.
Why do lithium-ion batteries that work on Note 7 explode without warning?
Lithium batteries store large amounts of energy in a very small, but sensitive, area and produce their stored energy in the form of "negatively charged atomic particles" electrons.
That is, when the battery is charged, electrons are pushed from the positive end of the "cathode" to the negative "anode", and when discharge the electrons are attracted to the positive terminal "cathode" and the energy is released, but during the charge the electrons move from negative to positive by wire External and only a few electrons are stored in the negative end of the battery to be stored to a later time, and thus in order to generate energy, the "positively charged" lithium ions are transmitted between the two sides separated by a membrane that allows lithium ions to pass through electrolyte.
When the battery is discharged, electrons flow from anode to the cathode to "generate energy" by crossing lithium ions of the membrane on their way to the cathode.
Lithium is a highly reactive element, carrying a lot of energy in its atomic bonds, so lithium-ion batteries can store about six times as much as acid lead batteries of the same size, they are great for mobile devices that need a lot of energy, but on the other hand this reaction can be the cause of battery damage.
The membrane protects the battery from the "electric diamond" circuit, but if the membrane breaks, the battery heats up quickly and may catch fire.
The Explosion of the Samsung Note7 is likely caused by a hole in this membrane.
It's still unclear exactly how it happened, and these two theories might explain it:
The first says that the company tried to stuff a lot of the pieces into the Note 7, by pressing all components including the battery in the narrowest possible space, bringing the negative and positive sides very close to each other and this is likely to occur electrical contact.
Second, due to the device charging the battery up to 100%, the filling tries to fill in thinking that one percent is empty, so the heat accumulates, resulting in the boiling of lithium and the subsequent explosion.
In other cases, the number of cases of the accused is still very high.
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