The smartphones Li-ion battery may be the soul culprit

By Jim Harrison

Samsung has given out an explanation of the cause of Galaxy Note 7
phone fires as follows: “Based on our investigation, we learned that there was
an issue with the battery cell. An overheating of the battery cell occurred
when the anode-to-cathode came into contact which is a very rare manufacturing
process error. We are working with multiple suppliers to ensure that a rigorous
inspection process is conducted to ensure the quality of our replacement units
and we do not anticipate any further battery issues.” This according to
the site http://wccftech.com.

Some people have said they were confused by this explanation because
the charge circuit should have a safety mechanism to shut down charging when
the battery voltage is not in the normal range. But, the destruction evident in
the problem phones could have been caused by the energy in the battery itself
and not involve any circuit design problem at all. The problem may be the quality
control of the 3,500 mAh lithium-ion battery.

 

GAJH01_Samsung_1S_Nov2016

Image: http://news.softpedia.com

Samsung has said that as of September
1st they were aware of 35 major battery problems with the device. So, 35 out of
how many?  Can’t find any exact sales
figures, but pre-orders for the Galaxy Note 7 were the strongest of
any Galaxy device, early reports indicated. The new flagship ‘phablet’ (5.7”
display) was announced on August 2 and had pre-orders hitting 200,000 within
the first two days. This put the Note 7 at double the number of pre-orders for the Galaxy S7,
after the same time period after launch. This is according to the Korea Herald. The Note 7 went on
sale in the US and Korea on August 19th.

Lithium-ion
cells got a bad rap for starting fires on the 787 Dreamliner, and now this. We better
hope lithium-ion is a good thing, because Elon Musk and other folks are
in the process of making a hell of a lot of them. The problem batteries here
were apparently made by Samsung SDI. Now the Note 7 will switch to Amperex
Technology Limited (ATL) batteries that are made in China. ATL supplied around
35% of the current model batteries.