why is the samsung galaxy note 7 catching fire? the lithium-ion battery explained - li ion battery cell

Samsung permanently stopped production of the galaxy Note 7 in less than two months after its launch, as the phone triggered hundreds of fires and explosions worldwide.
Flagship smartphone
Retail for £ 739, initially considered one of the best phones in 2016
Recall water worldwide
In the fear of overheating, resistant phones including "safe" replacement devices.
Samsung has yet to confirm the number of accidents, but it is estimated that more than 150 phones have overheated and have caught fire in some cases.
The following is a situation that may cause the phone to overheat.
Samsung traced the problem back to "defective batteries ".
Lithium is used in this model
Ion batteries for power supply.
These batteries have three parts: anode, cathode and lithium electrolyte.
The anode and cathode are positive and negative, and the electrolyte is a very flammable conductive chemical liquid between them.
Both elements work with the electrolyte, but the anode and cathode are separated by a porous physical barrier called a separator to prevent them from being connected.
The battery generates electricity by driving the electrons through the circuit to the anode until all the electrons in the smartphone are transferred to the anode.
When the smartphone is plugged into the charge, the electricity recauses the chemical reaction inside the battery, moving the electrons back from the anode to the cathode.
Lithium-ion batteries are usually used in devices such as laptops and mobile phones because they are small in size, light in weight, high in storage energy efficiency and slow in charging.
Lithium is a highly volatile substance, so any change in quantity will cause the liquid to overheat.
A report from the South Korean bureau of technology and standards found that Note 7 had a manufacturing error, "putting pressure on the plate inside the battery", making "negative and positive and negative contacts ".
When the anode is in contact with the cathode, it triggers the heat to get out of control.
When the battery temperature reaches about 100C (200F)
It starts to break down the material.
This startsa chemical chain reaction that releases its own energy accelerates the heating of the snowball effect.
In "heat out of control", the temperature keeps rising until the battery is on fire.
Most cell phone batteries are made by putting together a bunch of battery components.
However, the slaughterhouse can only produce as much power as its chemical composition can store.
One of the only ways to improve battery life is to increase the size of the battery, which is a high demand in the smartphone industry, but with the popularity of thin smartphones, this can lead to tight packaging of components.
Charging can cause the battery to heat up and it will catch fire if the phone does not release the thisheat at enough speed.
Smartphones may prevent heat from spreading.
If the battery is overheated, the lithium battery can also be clustered around the anode, creating a short circuit and potentially penetrating the enclosure or partition.
This can cause the liquid to leak into other parts of the phone and ignite.
Similarly, if unwanted materials, such as metal scrap, accidentally fall into the inside of the battery during production, they short-circuit the battery and cause heat to get out of control.
The discard device may also cause the separator to break between the anode and the cathode, which also triggers the heat to get out of control.
If the voltage level or input current of the power plug is not controlled, this may cause overheating.
When "battery management system "-
It monitors current, usually indicating that the chip inside the phone stops current when the battery is fully charged-
Failure or failure.
This may help explain why Samsung released a software update after the news of overheating, limiting the charging capacity of the Note 7 phone to up to 60 cents.
Other phones have suffered a similar fate.
In 2009, Nokia recalled 46 million cell phone batteries after finding some phones short-circuited.
It is reported that Apple phones rarely catch fire in 2015 and 2016.
Last month, asix-year-
The old boy was rushed to New York hospital for burn treatment after the Samsung Galaxy Corecaught caught fire in his hand.
While many devices use these batteries and have exploded phones in the past, Note 7 reports of overheating are large.
It is reported that the failure of the phone may be due to Samsung's production of then7.
To exceed sales of Apple's iPhone 7 and 7 Plus, Samsung has put pressure on engineers to deliver Note 7 with tight deadlines and lack of sleep.
"Obviously, they missed something," said ABloomberg intelligence analyst Ansiya Ray . ".
"They were in a hurry to beat Apple and they made a mistake.
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