Samsung blames Galaxy Note 7 smartphone fires on battery design, manufacturing

Samsung Electronics pronounced Monday that after contrast some-more than 200,000 Galaxy Note 7 smartphones, it found defects in dual sets of batteries from dual opposite manufacturers done a inclination disposed to locate fire.

Samsung’s mobile multiplication president, Koh Dong-jin, ruled out any problems with other aspects of a Note 7, possibly in a hardware or a software. He denied a South Korean company, had rushed to recover a reward phone to kick Apple’s recover of a new iPhone. The Note 7 was launched on Aug. 2, about a week progressing than a prototype in 2015.

Samsung forsaken a Note 7 usually dual months after in one of a misfortune product fiascos ever.

It pronounced that in ferreting out a means of a problem, 700 hundred researchers and engineers tested some-more than 200,000 inclination and some-more than 30,000 batteries and replicated what happened with a Note 7 phones.

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U.S. companies UL and Exponent also examined a batteries granted by South Korea-based Samsung SDI and China-based Amperex Technology Ltd., or ATL.

The German association TUV Rheinland analyzed a Note 7 supply sequence as partial of a investigation, Samsung said.

Samsung henceforth forsaken a Galaxy Note 7 smartphones Oct after reports they were overheating and throwing fire. The association estimates a problems will cost it during slightest $5.3 billion US by early 2017. (Ahn Young-joon/Associated Press)

The Galaxy Note 7 featured one of a biggest battery capacities so distant for smartphones during 3,500 mAh, or milliampere hour, that gave it a top appetite firmness of all Samsung’s devices. Koh pronounced Samsung and a outward inspectors found no justification that a high appetite firmness alone had done a phones disposed to overheating.

Rechargeable lithium batteries are some-more receptive to overheating than other forms of batteries if they are unprotected to high temperatures, are shop-worn or have production flaws. A rarely technical reason of Note 7 problems boiled down to a comparatively vast batteries not wise good into a phones, and not adequate insulating element inside.

In batteries by one manufacturer — expected Samsung SDI — used in a phones in a initial Note 7 recall, inspectors found repairs to top corners. That, total with skinny separators and high appetite density, caused a phones to overheat. The cell-pouch pattern of a battery did not embody adequate room to safely accommodate a electrodes — another flaw.

Pressed suppliers for innovation

It was misleading to what border a battery builder was obliged for those problems: Samsung pronounced usually that it had supposing “targets” for a batteries.

“We suggested that a Note 7 has innovations and a compress pattern and a 3500 mAh (battery) though we did not know how to make a separators within (the battery) or how many millimetres thick they should be,” Koh told reporters.

That might advise a relapse both in communication between Samsung and a suppliers and in peculiarity control and testing.

In other batches of batteries from a second manufacturer, presumably ATL, a researchers found welding defects and a miss of protecting fasten in some battery cells.

Though it faulted a batteries from a suppliers, Samsung pronounced in a matter “we supposing a aim for a battery specifications for a innovative Note 7, and we are holding shortcoming for a disaster to eventually brand and determine a issues outset out of battery pattern and manufacturing.”

Koh pronounced Samsung would provide a eventuality as a “chance to strengthen a reserve of lithium-ion batteries for a whole industry, not usually us.”

Recalls of a Note 7s began in Sep after reports emerged that some of a phones were overheating and throwing fire. At a time, Samsung blamed a smirch in a lithium batteries from one of a dual suppliers, but observant that manufacturer was to blame.

In October, Samsung forsaken a phone for good after new Note 7s with opposite batteries released as replacements also were found to be throwing fire. It estimates a problems will cost it during slightest $5.3 billion by early 2017.

The association has removed 3.06 million Note 7 phones. About 4 per cent, or 120,000 units, of a removed Galaxy Note 7, are still not returned.

Samsung has taken feverishness for a doing of a remember and a hasty, apparently deficient initial review into what went wrong.

The association has pronounced it is formulation a recover of a subsequent era Galaxy phones. To do so, it indispensable to definitively solve a poser over a Note 7.

Article source: http://www.cbc.ca/news/technology/samsung-galaxy-note-7-battery-fire-cause-design-1.3947604?cmp=rss