After a thorough investigation and analysis of a few months, Samsung held a press conference in Seoul today, and the world's three largest independent research institutions, Galaxy Note7 announced the results of the survey, also announced a series of measures to avoid the recurrence of similar incidents.
In question, Samsung electronics division president DJ Koh responded to the previous Note7 recall in the Chinese market attitude. He said that the first recall, other countries are using the A's battery (SDI), but China use the B's battery (ATL), so in the first recall, Samsung believes that only the A battery is a problem, do not know the B's battery is also a problem.
He also mentioned that Samsung did not implement a double standard for China, but he also admitted that Samsung has a communication problem with the Chinese market in this matter, for Chinese consumers, he apologized. Samsung will strive to provide better Note products for the Chinese market in the future.
Samsung announced the cause of Note7 video explosion:Https://v.qq.com/x/cover/v3br2zba4ajlngz/v0022iedk89.html
DJ Koh further explained at the press conference, in the past few months, Samsung has invested more than 700 engineers on the detection of 200 thousand phones. The first recall of A batteries and second recall of B batteries, are not the same. Among them, the battery A is mainly because of the negative plate is squeezed by the battery B is due to copper melt, that is the source of the accident.
Over the past few months, in order to find out the reasons for the Galaxy Note7 event, Samsung launched a detailed investigation. In the course of the investigation, Samsung Galaxy Note7 hardware, software, and related processes such as assembly, quality inspection, logistics and other aspects of a careful review. For the reduction of fuel loss, Samsung spent more than 700 companies, researchers and engineers build large-scale experimental equipment, testing more than 200 thousand assembly intact and more than 30 thousand mobile phone batteries, to further clarify the source of the problem.
In the past few months, Samsung has invested more than 700 engineers on the detection of 200 thousand mobile phones. The first recall of A batteries and second recall of B batteries, are not the same. Among them, the battery A is mainly because of the negative plate is caused by extrusion, and the battery B due to copper melt, is the real source of the accident. In addition, there are part of the battery was found not to use insulation tape.
On the other hand, the Underwriters Laboratories (UL), the possibility of Exponent laboratory and Germany Rhine TUV group and three party mechanism for Note 7 events launched an independent investigation.
First of all, UL first ten damaged equipment for the first phase of the investigation. The results show that the reasons for assembly, manufacture and battery design exist simultaneously. The production of manufacturing, including the lack of reason on the convex tab, cause internal short circuit; battery design including the isolation film is thin, lead to poor protection etc.. In short, the production and design of the battery led to the explosion of Note 7.
Secondly, in the Exponent laboratory investigation, A company in the presence of cathodic cell membrane damage, easy to bring damage to the membrane, and ultimately lead to fever. Although there is no defect in the A company, the B battery has some new problems, such as the bending of the electrode plate, so that the contact between the cathode plate and the anode plate will result in short circuit. The reason is that due to the bonding process, the joint is raised, which results in the contact of the plate.
Finally, TUV investigated the specific factors related to the battery in the logistics system, and the results show that there is no obvious weakness in the Samsung factory in Vietnam and korea.
Since August 2, 2016 Note7 global release to Samsung announced a full recall of Note7 in October 11, 2016, Samsung has experienced a full 70 days of twists and turns.
Following the explosion of Note7 through key nodes:
August 24, 2016
South Korea, the world's first Samsung Note7 explosion. It is reported that a South Korea in advance to get Note7 users, mobile phone charging suddenly exploded at night, the phone is severely damaged. Followed by the United States, Australia and other countries have a similar explosion case.
August 31, 2016
Note7 continuously explosion let Samsung alert. On this day, Samsung announced that it would carry out additional quality control tests on the Note7 phone, thus delaying the delivery time of the phone. Previously Samsung said Note7 demand far exceeded expectations, once caused a shortage of supply.
September 2, 2016
Samsung held a press conference, Gao Dongzhen president of Samsung's mobile division of Samsung Note7 battery explosion made a public apology, and officially announced a worldwide recall of 2 million 500 thousand Samsung Note7 has been sold, then Samsung received a total of 35 explosions report. Samsung said that South Korean users can replace the new phone from September 19th. However, for the Chinese market, Samsung has said that the State Bank Note7 because there is no problem supplier to provide the battery, it is not within the scope of the recall.
September 8, 2016
The United States, Australia, Japan, Singapore, Canada, India and other more than and 10 countries have announced the ban on the use of Note7 users on the plane or charge, some airlines will also be included in the list of prohibited consignment. U.S. Consumer Product Safety Commission issued a warning on 9, urging consumers to stop using Note7 phones.
September 12, 2016
Samsung Note7 recall by the impact of the event, Samsung shares hit a record low since August 2012, reaching 1 million 465 thousand won per share.
September 13, 2016
In order to avoid the Samsung Note7 Samsung continues to explode, try the software upgrade for users to control the situation, emergency push OTA update, only charging power and limit the Samsung Note7 in the system update to 60%.
September 14, 2016
By the national quality inspection administration after the interview, Samsung Chinese announced that the National Bank Note7 since September 14th July 20, 2016 recall period until August 5, 2016, a total of 1858 Taiwan area, China. For the scope of the recall of Note7, SamSung China will be free for the user to replace a model with the relevant requirements of the new phone, to eliminate security risks.
September 18, 2016
September 19, 2016
According to the exposure of users Note7 in battery explosion, Samsung battery supplier ATL released a statement on its official website, said that after preliminary study, no direct relationship between the sample and the combustion production of the battery, and speculated that the heat source comes from the cell body, there may be other factors causing great external heating problem.
September 29, 2016
Samsung said today that the company did not fully consider the feelings of domestic consumers in the country Note7 explosion, was not fully explained, so the most sincere apology to Chinese consumers. Samsung also stressed that the issue of the recall has not implemented a double standard on the Chinese market.
October 5, 2016
A U.S. user on the flight to get the so-called Note7 Security version of the phone, but there is still an explosion. According to the user's description, the Note7 is in the off state, but the body suddenly heat and smoke, seeing this, he will be immediately removed from the mobile phone on the floor in the clothes, mobile phone will soon burned carpet.
October 9, 2016
October 11, 2016
Samsung today announced that it will permanently stop production of Note7 mobile phone, all partners no longer sell and replacement of Note7, and Note7 users forced shutdown, stop using, including the original mobile phone and has completed the replacement of the user. At the same time, SamSung China announced the recall of the line version of Note7 rules, commitment from October 14th to December 31st for consumers to return. If the user chooses to return Note7, Samsung will return 200 yuan additional subsidies. Choose to buy after the return of S7 edge, S7 consumers, Samsung will provide 600 yuan subsidy.
January 1, 2017
Samsung said, January 1, 2017, Note7 state line version of the original purchase channels will no longer handle returns, the user can carry my Note7 to the Samsung customer service service center to return, but no longer provide return subsidies. If the user selects a replacement, Samsung will provide 300 yuan coupons designated supplier. Samsung also said the recall policy has changed since February 1st.
January 10, 2017
Samsung official said that at present the world has recalled more than 96% of Samsung Note7, the remaining more than 10 mobile phone has not yet been recalled.