samsung: batteries only problem with fire-prone note 7s - lithium ion rechargeable battery

SEOUL, South Korea
Samsung Electronics said on Monday that tests of more than 200,000 Galaxy Note 7 smartphones found that two sets of batteries from two different manufacturers were defective, making the devices easy to catch fire.
Koh Dong, president of Samsung Mobile-
Jin ruled out any issues with Note 7 in terms of hardware or software.
Samsung will use the experience gained from the survey to improve the safety of lithium-ion batteries in the industry, he said, although analysts questioned whether the company really touched the heart of the problem.
Samsung stopped the Note 7 in just two months after it was released in August.
This is one of the worst products ever.
The company said 700 researchers and engineers tested more than 200,000 devices and more than 30,000 batteries and copied the Note 7 phone to try to determine what caused some phones to overheat. U. S.
UL and Exponent also checked the batteries supplied in South Korea
Headquartered in Samsung SDI and China-
Headquartered in Amperex Technology Co. , Ltd. , or ATL.
As part of the survey, Germany's TUV Rhine analyzed the Note 7 supply chain, Samsung said.
Galaxy Note 7 is by far one of the largest battery capacity of smartphones, with a battery capacity of 3,500 hours, that is, milliamperes, making it the highest energy density in all Samsung devices.
However, Koh said that Samsung and external inspectors did not find any evidence that the phone was prone to overheating with just high energy density.
Rechargeable lithium batteries are more prone to overheating than other types of batteries if they are exposed to high temperatures, damaged or have manufacturing defects.
The highly technical explanation of the Note 7 problem comes down to the fact that relatively large batteries are not well installed in their bags and there is not enough insulation in them.
Batteries produced by a manufacturer
Samsung SDI-
During the initial Note 7 recall, inspectors found that the handset was damaged.
This is combined with a thin separator and a high energy density, causing the phone to overheat. The cell-
The bag design of the battery does not have enough space to safely accommodate its electrodes-another flaw.
It is not clear to what extent battery manufacturers are responsible for these issues: Samsung only said it has provided a "target" for the battery ".
"We suggest that the Note 7 has an innovative and compact design at 3500 hours (battery)
But we don't know how (the battery)
Or how thick they should be, "Koh told reporters.
This may indicate a failure in communication between Samsung and its suppliers and in quality control and testing.
In other batches of batteries from the second manufacturer (presumably ATL), the researchers found that some batteries had welding defects and a lack of protective tape.
Patrick Moorhead, president of Moor Insights & Strategy, said that the chances of two different vendors having problems on the same phone are very low.
Despite Samsung's criticism of its supplier's battery, it said in a statement, "We have targeted the battery specifications of the innovative Note 7, we take responsibility for failure to finally identify and verify problems that arise in battery design and manufacturing.
Koh said Samsung will see the event as "an opportunity to strengthen lithium safety --
Not only are we, Ion batteries throughout the industry.
Analysts say the root cause of the fire is unclear.
"Samsung said these weaknesses could make it easy for phones to catch fire.
I understand, but what triggered the fire in this case?
Did they discuss if there were any other reasons?
No, "said Park Chul Wan, former director of the National next-generation battery research center --
Korea Institute of Electronic Technology.
On September, people began recalling Note 7 after reports that some phones had overheated and caught fire.
At the time, Samsung accused one of its two suppliers of defective batteries, but did not say which manufacturer should be blamed.
On October, Samsung permanently abandoned the phone after discovering that the new Note 7 s of the replaced different batteries were on fire.
It estimates that these problems will cost at least $5.
3 billion through early 2017.
The company has recalled 3.
6 million Note 7 phone.
Of the recalled Galaxy Note 7, about 4% or 120,000 units are still not returned.