Samsung Galaxy Note 7 explosions blamed on "aggressive" design           第8週      三星手機爆炸

Who: Samsung

When:  Earlier this year 

Where: Manufacturing engineering company
Why: Battery explosions
How: Performed a teardown of the device

Samsung is having some trouble identifying what went wrong with the Galaxy Note 7, which earlier this year was recalled due to a high number of battery explosions, but someone else believes they have the answer. Manufacturing engineering company Instrumental has performed a teardown of the device, and found that the battery simply did not have enough physical room for error.

The problem had more than one factor, the teardown found. A phone battery is made up of positive and negative layers, with separators to keep them from touching and sparking. In order to streamline the size of the battery and maximise space, these separators may have been too thin. Moreover, Samsung made the battery thinner, removing thickness margins.

When batteries are charged, they swell a little. Around 10 percent extra space is required, but the battery entirely filled its 5.2-millimetre-deep pocket, with very little space around the edges. Add the normal pressures of day-to-day handling, and the risk of explosion goes up.

“Looking at the design,Samsung engineers were clearly trying to balance the risk of a super-aggressive manufacturing process to maximize capacity, while attempting to protect it internally,” the teardown reads. “Samsung took a deliberate step toward danger, and their existing test infrastructure and design validation process failed them.”  When batteries are charged, they swell a little. Around 10 percent extra space is required, but the battery entirely filled its 5.2-millimetre-deep pocket, with very little space around the edges. Add the normal pressures of day-to-day handling, and the risk of explosion goes up.

“Looking at the design,Samsung engineers were clearly trying to balance the risk of a super-aggressive manufacturing process to maximize capacity, while attempting to protect it internally,” the teardown reads. “Samsung took a deliberate step toward danger, and their existing test infrastructure and design validation process failed them.”

Location:http://www.cbsnews.com/news/galaxy-note-7-explosions-caused-by-aggressive-design/

Keywords:
recalled:召回
battery explosions:電池爆炸
teardown:拆卸
device:設備
error:錯誤
layers:層
separators:分離器
streamline :流線型
maximise:最大值
infrastructure:基礎設施
validation process:證實過程
manufacturing:製造業