Admin l Monday, January 23, 2017
SEOUL, Korea – January, 23, 2017 – Following several months of in-depth investigations, Samsung Electronics today announced factors that led to reported cases of Galaxy Note7 explosion.
It also announced measures to prevent a recurrence during a press conference held in Seoul, Korea. Among the factors responsible after thorough investigation are internal cell faulting between positive electrode tab welding defects and the copper foil of the negative electrode directly opposite the defective welds; welding defects in some incident cells were found to be tall enough to bridge the distance to the negative electrode foil ; Some cells examined were assembled without protective tape over the positive electrode tab, increasing the likelihood of an internal cell faults; Poorly controlled welding of the positive tab in Manufacturer B cells creates sharp, relatively tall welding defect features”, Kevin White, Ph.D, Principal Scientist, Exponent and Holger Kunz said.
“Normal swelling and contraction of the electrodes during charge and discharge forces the weld defect features into the opposing negative electrode; short circuit between the weld defect feature on the positive tab and the copper of the negative electrode results in heating of the cell”, he added.
Speaking at the event, DJ Koh, President of Mobile Communications Business, Samsung Electronics, expressed his sincere apology and gratitude to Galaxy Note7 customers, mobile operators, retail and distribution partners and business partners for their patience and continued support.
Koh was joined by executives from UL, Exponent and TUV Rheinland, leading independent industry groups that conducted their own investigation into various aspects of the Galaxy Note7 incidents.
Speakers included:Sajeev Jesudas, President, Consumer Business Unit, UL, Kevin White, Ph.D, Principal Scientist, Exponent and Holger Kunz, Executive Vice President Products, TUV Rheinland AG. Speakers discussed the findings of the investigations in depth and unveiled new measures Samsung has taken to respond to the incidents.
Based on what the company learned from the investigation, Samsung implemented a broad range of internal quality and safety processes to further enhance product safety including additional protocols such as the multi-layer safety measures and 8-Point Battery Safety Check.
Samsung also formed a Battery Advisory Group of external advisers, academic and research experts to ensure it maintains a clear and objective perspective on battery safety and innovation.Battery Advisory Group members include: Clare Grey, Ph.D., Professor of Chemistry, University of Cambridge, Gerbrand Ceder, Ph.D., Professor of Materials Science and Engineering, UC Berkeley; Yi Cui, Ph.D., Professor of Materials Science and Engineering, Stanford University; Toru Amazutsumi, Ph.D., CEO, Amaz Techno-consultant.
“For the last several months, together with independent industry expert organizations, we conducted thorough investigation to find cause to the Galaxy Note7 incidents.” Koh said.
“Today, more than ever, we are committed to earning the trust of our customers through innovation that redefines what is possible in safety, and as a gateway to unlimited possibilities and incredible new experiences,” he said.
