Samsung, finally revealed the in-depth investigation report regarding Galaxy Note 7 explosions. Samsung in a Statement said, " Based on detailed analysis of the affected batteries, both Battery A from the 1st recall and Battery B from the 2nd recall, we identified separate factors that originated in and were specific to the different batteries."
The Final Report:-
Battery 'A' Assessment:-
1. There may be multiple contributing factors relating to battery assembly/manufacturing and design that combined led to the failure of the Note 7 in the field.
A. Battery assembly/manufacturing:
- Deformation at the upper corners
B. Battery Design:
- Thinner separator could lead to poorer protection and reduced tolerance to manufacturing defects
- Higher energy density in general can exacerbate the severity of a battery failure
2. One major failure mechanism likely:
A combination of deformation at the upper corners+thin separator+repeating mechanical stresses due to cycling, causing higher possibility of separator damage leading to an ISC between aluminium and copper foil at the corner.
3. Additional investigation is needed to understand the root-cause of the deformations at the upper corners.
Battery B Assessment:-
1. No evidence of device-level compatibility issue that may have contributed to the failure of the Galaxy Note 7 in the field.
2. There may be multiple contributing factors relating to production quality and battery design that when combined led to the failure of Note 7 in the field.
A. Product Quality:
- Missing insulation tape on tab could result in higher possibility of ISC
- Bigger protrusion of welding points in tab could lead to higher possibility of seperator puncture
- Misalignment of insulation tape and/or tab could bring more risk of ISC
B. Battery Design:
- Thinner separator could lead to poorer protection and reduced tolerance to manufacturing defects
- Higher energy density in general can exacerbate the severity of battery failure
3. One major failure mechanism for field incidents is likely: The combination of (1) missing insulation tape+ (2) sharp edged protrusions on tab + (3) thin separator, all leading to a high possibility of an ISC between cathode tab and anode, subsequently resulting in heating and fire.
4. Further analysis is needed to understand the root-cause of the damage to the edge/corner of the battery which results in ISC at that location.
Following the Note 7 incidents, Samsung said that it has developed strict quality assurance protocols across its entire development process in an effort to renew its commitment to safety. This includes, 8-Point Battery Safety Check, multi-layer safety measures protocol and new battery advisory group.
So, what do you think about the Samsung detailed report about the Note 7 incidents. Will Samsung get back the trust of the customers? Well I do hope that all smartphones, made by Samsung or any other manufacturer, will be safe to use now on. Do let me know your thoughts in the comment section and stay tuned for more contents from me.
Source: Samsung Press Release
0 comments:
Post a Comment