Real Reason for the Samsung Galaxy 7 Battery explosion Revealed | Mobile phone latest news Google+ Follow Smartfonefreaks on Twitter

Photo Crd: Reuters

The demise of the Samsung Galaxy Note 7 has captured the imagination of people for the 2nd half of 2016 and naturally theories were put forward, some reasonable, others...not.

Samsung originally blamed a battery cell issue in cells from one supplier, however the second recall and subsequent cancellation of the phone would seem to discount that.

It seems though that a concrete reason might have been espoused as a report from engineering firm Instrumental claims to have solved the mystery. 

According to the firm's CEO the cause of the explosion is actually quite simple-- the batteries were too large.

In her report, Anna Shedletsky concludes that there wasn't enough space around the battery to allow for various manufacturing tolerances, and the slight expansion of the battery through use.

She said
"What's interesting is that there is evidence in the design of an intellectual tension between safety and pushing the boundaries. Samsung engineers designed out all of the margin in the thickness of the battery, which is the direction where you get the most capacity gain for each unit of volume.

"But, the battery also sits within a CNC-machined pocket -- a costly choice likely made to protect it from being poked by other internal components. Looking at the design, Samsung engineers were clearly trying to balance the risk of a super-aggressive manufacturing process to maximize capacity, while attempting to protect it internally."
High-res images posted by Instrumental show less than 0.1mm between that "machined pocket" and the top of the battery. Other dimensions are similarly constrained.

Doubts arise when you consider that the sample size for this report is just one unit but the report is quite compelling in its argument.

Interestingly, Shedletsky says that even if the Note 7 hadn't suffered an early demise, the shortage of space around the battery would have eventually caused the phones to break apart through battery swelling.

It's speculated that Samsung will look at this report and probably think twice about battery issues when they release the Note 8 next year.

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