Samsung Galaxy Note 7 Units Exploded Due to Its 'Aggressive Design': Report
If a smaller battery was used, it would not have met the same fate but would have reduced the system's battery life below the level of Note 5, the model it was aiming to not only succeed but outdo.
After continuous blasts of now discontinued Samsung Galaxy Note 7, the reports suggest that the fiasco was due to an 'aggressive' design push by the company that caused its battery to compress beyond what it could sustain.
In a report of Instrumental, a company that makes engineering tools, it was said that the company conducted teardowns of such devices. It examined a Galaxy Note 7 and found that the problem was not with the battery alone as earlier claimed by the company.
It is to be noted that earlier Samsung had blamed its sister subsidiary Samsung SDI's lithium polymer battery for the problems, however, soon enough new models that contained batteries from other suppliers like China's ATL also met a similar fate.
The report of the teardown shows that the phone had been designed in such a way that it could compress the battery even during normal operation.
Explaining why this can create problems, the report says the lithium-polymer battery in the Note 7 is a flattened "jelly-roll". This consists of a positive layer made of lithium cobalt oxide commonly used in lithium-ion batteries, a negative layer made of graphite, and two electrolyte-soaked layers made of polymer. This separator is crucial as it allows ions to flow between the positive and negative layers without them physically touching each other. However, if the positive and negative layers touch, the energy goes directly into the electrolyte. This results in heating the electrolyte, and in this case, there was more energy flow resulting in more heat and consequent explosion.
In the report it has been said that these separator layers were too thin to sustain the pressure. If a smaller battery was used, it would not have met the same fate but would have reduced the system's battery life below the level of Note 5, the model it was aiming to not only succeed but outdo. Additionally, the battery would be small compared to the iPhone 7 Plus, one of the iPhone models Samsung was aiming to take on this year.
Interestingly, the troubled company is expected to reveal its official version of why the Note 7 fiasco happened sometime this month.