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Here is why Sumsung Note 7 phones get explosive

[Introduction] Battery is a part with energy to which the safety is the most important. Therefore, we can never ignore the safety fact while pursuit the higher capacity.

Currently, several reported incidents of overheating smartphones of  Samsung Galaxy Note 7 worldwide, some incidents also happened among the smartphones sold in mainland ,China.


The company stopped all sales and shipments of the Note 7 which were made during 20th, July and 5th August, worked with government agencies and cellular carriers  to provide refunds and exchanges for the phone, and apparently it still wasn't enough:
But why did these phones even catch fire to begin with?


Here's what we know about Samsung's battery woes.
The basics

The science behind phone battery fires is actually pretty simple, and fairly well understood. Much like the infamous exploding hoverboards, phones use lithium ion battery packs for their power, and it just so happens that the liquid swimming around inside most lithium ion batteries is highly flammable.
If the battery short-circuits -- say, by puncturing the incredibly thin sheet of plastic separating the positive and negative sides of the battery -- the puncture point becomes the path of least resistance for electricity to flow.
It heats up the (flammable!) liquid electrolyte at that spot. And if the liquid heats up quickly enough, the battery can explode.
Samsung had a manufacturing error that "placed pressure on plates contained within battery cells," which "brought negative and positive poles into contact."
"The defect was revealed when several contributing factors happened simultaneously, which included sub-optimized assembly process that created variations of tension and exposed electrodes due to insufficient insulation tape," a Samsung representative tells 

Or, in plain English: the thin plastic layer that separates the positive and negative sides of the battery got punctured, became the shortest route for electricity to zap across the battery (that's why they call it a "short-circuit"), and became a huge fire risk.


What does pressure have to do with it? Some experts from the battery industry explain that today's cell phone batteries are made by literally pressing together a stack of battery components -- and that battery companies are under pressure (no pun intended) to cram in as much battery capacity as possible.
Battery is a part with energy to which the safety is the most important. Therefore, we can never ignore the safety fact while pursuit the higher capacity.

銆怓rom Chinese Science Daily, Photos from Internet, Compiler: YSC Marketing Dept.銆

YSC/Marketing Dept.
2016-10-28
鑴氭敞淇℃伅
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