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Engineers May Have Discovered the Real Reason Behind Exploding Galaxy Note 7 Devices

As of this writing, there's still no official finding released by Samsung on what caused the disappointment over its Galaxy Note 7 devices. By now, everyone may have already heard about the fiasco. The first time Samsung recalled its flagship device and gave out replacement units, they didn't expect the same disaster to take place. Because of this, the South Korean manufacturer has decided to stop distribution of the Galaxy Note 7 and conduct its own investigation on what has caused these devices to explode.

The wait, however, has prompted an engineering firm to organize its own analysis to unearth the reason why the device has been faulty. To help with their analysis, manufacturing technology firm called Instrumental, embarked on a hunt for a Galaxy Note 7. When they were finally able to obtain one, they set up a couple of fire extinguishers before they tore down the phone to see where Samsung went wrong with its construction.

Upon further analyzing the 3,500 mAh battery included on the Galaxy Note 7, the engineers were able to understand a key problem with the battery. On a blog post, Instrumental wrote that "the design can compress the battery even during normal operation."

According to the engineers:
The lithium-polymer battery included on the device was a flattened "jelly-roll" that consisted of a positive layer made of lithium cobalt oxide, a negative layer made of graphite, and two electrolyte-soaked separator layers made of polymer. The separator layers allow ions (and energy) to flow between the positive and negative layers, without allowing those layers to touch. If the positive and negative layers ever do touch, the energy flowing goes directly into the electrolyte, heating it, which causes more energy to flow and more heat-- it typically results in an explosion. Compressing the battery puts pressure on those critical polymer separator layers that keep the battery safe.
What the engineers discovered was that there were two design problems on the Galaxy Note 7. The first problem was that the battery included was too susceptible to a small amount of pressure. Additionally, Samsung wasn't able to put enough tolerance around the battery on the Galaxy Note 7. As a result, regular use of the device led to it compressing its battery.

Based on their analysis, Instrumental believes the engineers from Samsung were already aware that they were walking a very fine line. Evident of this speculation was the fact that the battery sat on a custom CNC enclosure, one that's considered an unusual and costly design choice but essential to protect the battery from the entire phone. The problem with the Galaxy Note 7 was that this enclosure did not work.

Instrumental also discovered that if Samsung never recalled the device for its exploding batteries, its users would have encountered other issues due to its mechanical battery swell. It would have also pushed the device's battery life to a lower level compared to its predecessor, the Note 5.

So after all, it turns out everyone's hunch about the Galaxy Note 7 exploding batteries was right after all. As Samsung challenged itself to produce the best phone on the market, they sacrificed the Galaxy Note 7. And in the end, it proved to be a very bad decision for them.

Source: BGR



Comment Page :
  1. That the problem folks. People are always trying to make thinner phones and this is what you get. Don't compress the battery and have a fat bezel phone like the IPhone 7 Plus and you will be alright. There nothing wrong with alot of real estate on the front.

    1. The obsession with making phones too thin is one that is driven by manufacturer with and not customer preference. And it results in phones that are flimsy with battery charges that only last 3 hours.

      It's like removing slider keyboards and also removing the headphone jack. And truth be told, a lot of these bad ideas come from Apple and then everyone copies them.

      With apple, the phones being too thin results and then being limp. Was Samsung, it results in them exploding.

      I hear Nokia is making new Android phones. Maybe they should make them like they're classic dumbphones that are three quarters of an inch thick and last a week on a charge. Then the world might beat a path to their door.

  2. It's pretty predictable. The editors choose to make a post like this which is relevant to mobile phone users including prepaid users.

    And then a topic nazi, like in the very first comment, complains.

    Truth be told, this is very relevant to any phone user who uses a phone that has a lithium ion battery. Those who don't use such phones to such batteries have a right to complain. Let's see if we can find anyone like that...

  3. No Worries! The Galaxy Note 7 is water resistant, which comes in handy when you're trying to extinguish it from being on fire.

  4. December is the best time of the year when the nights are drawing in, there's a chill in the air & the whole family gathers round a roaring Galaxy Note 7.

    1. ..and a roasting Marshmallows over a crackling Note 7, priceless!!

  5. I for one am tired of this bs pushing the boundaries and calling it courage. I would prefer safe/reliable/good battery over shallowness.

  6. I would like to see a phone built that doesn't require a screen protector or case or extra battery power.

    By the time you add all that the phone is about a 1/2 inch thick, so just build them right to begin with.

    1. By not including a screen protector or case or extra battery power, they can make a thinner, cheaper phone that appeals to a larger audience. The mega bucks accessory is then there to serve you if you want to add on those extras :) .

  7. Phones require cases and protectors? Ive never had those and never distroyed a phone. I also havent paid over $100 for a phone in 10 years. Mostly, my budget is $20-30 these days which got me a few really nice phones over this BF season.

  8. Flushing out the stragglers....

    "No more cellular, Wi-Fi, and Bluetooth access for Note 7’s in Canada" :

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