Finally We Know Reason Behind Samsung Note 7 catching fire


Galaxy Note 7 battery explosions

In September First explosion of Samsung Galaxy Note 7 cause. At first Samsuung dentified the issue as one relating to the lithium polymer battery manufacturing process by Samsung SDI.where too much tension was used in manufacturing, and offered to repair affected phones.

After Several weeks batteries replaced also explored again. Then after Samsung decide to recall all Galaxy Note 7. Samsung reported different reason behind this explosion.

As per….

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.

Pushing the boundaries

While we were doing the tear down, Sam wondered, “Samsung engineers are smart.  Why would they design it like this?”  The answer isn’t a mystery: innovation means pushing the boundaries.  For something that is innovative and new, you design the best tests that you can think of, and validate that the design is okay through that testing.  Battery testing takes a notoriously long time (as long as a year for certain tests), and thousands of batteries need to be tested to get significant results.  It’s possible that Samsung’s innovative battery manufacturing process was changing throughout development, and that the newest versions of the batteries weren’t tested with the same rigor as the first samples.

If the Galaxy Note 7 wasn’t recalled for exploding batteries, Sam and I believe that a few years down the road these phones would be slowly pushed apart by mechanical battery swell.  A smaller battery using standard manufacturing parameters would have solved the explosion issue and the swell issue.  But, a smaller battery would have reduced the system’s battery life below the level of its predecessor, the Note 5, as well as its biggest competitor, the iPhone 7 Plus.  Either way, it’s now clear to us that there was no competitive salvageable design.

The design and validation process for a new product is challenging for everyone.  In this case, Samsung took a deliberate step towards danger, and their existing test infrastructure and design validation process failed them.  They shipped a dangerous product.  That this is possible at one of the top consumer electronic companies in the world is humbling — and demonstrates the need for better tools.  Instrumental is building them.

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