Skip to main content

Why smartphone batteries sometimes explode?

LONDON: Scientists have been able to track the entire process of what happens inside lithium-ion batteries that leads to their overheating and exploding.

"Understanding how Li-ion batteries fail and potentially cause a dangerous chain reaction of events is important for improving their design to making them safer to use and transport," said the scientists.

"We combined high energy synchrotron X-rays and thermal imaging to map changes to the internal structure and external temperature of two types of Li-ion batteries as we exposed them to extreme levels of heat," said first author Donal Finegan from University College London (UCL).

The team looked at the effects of gas pockets forming, venting and increasing temperatures on the layers inside two distinct commercial Li-ion batteries as they exposed the battery shells to temperatures in excess of 250 degrees Celsius.

The battery with an internal support remained largely intact up until the initiation of thermal runaway, at which point the copper material inside the cell melted indicating temperatures up to 1,000 degrees Celsius.

This heat spread from the inside to the outside of the battery causing thermal runaway.

In contrast, the battery without an internal support exploded causing the entire cap of the battery to detach and its contents to eject. Prior to thermal runaway, the tightly packed core collapsed, increasing the risk of severe internal short circuits and damage to neighbouring objects.

"Hopefully from using our method, the design of safety features of batteries can be evaluated and improved," said corresponding author Paul Shearing, also from UCL.

The findings were published in Nature Communications.

An exerpt from Times of India

Comments

Popular posts from this blog

Zarurat Nahi Hai...

make money online Mujhe pata hai hum sath nahi hai, Par ye har roz yaad dilane ki zarurat nahi hai, Mujhse hui hai kuch galtiyan Zindagi mein, Par ye har baar batane ki zarurat nahi hai, Mai jaanta hu k mujhse kuch umeeden thi tumhari, Par mai unpe khara nahi utara, ye har baar jatane ki zarurat nahi hai. Roz tumhari wajah se waha aata hu, mai bewakuf hu ye dikhane ki zarurat nahi hai. Tum khush raho isse zyada kuch nahi chaha, par uske liye mujhe har roz satane ki zarurat nahi hai -Anurag Kushwaha

The Oath of The Vayuputras (Shiva Trilogy #3)

The Oath of The Vayuputras by: Amish Tripathi Rating: 4.0/5.0 ONLY A GOD CAN STOP IT. Shiva is gathering his forces. He reaches the Naga capital, Panchavati, and Evil is finally revealed. The Neelkanth prepares for a holy war against his true enemy, a man whose name instils dread in the fiercest of warriors. India convulses under the onslaught of a series of brutal battles. It's a war for the very soul of the nation. Many will die. But Shiva must not fail, no matter what the cost. In his desperation, he reaches out to the ones who have never offered any help to him: the Vayuputras. Will he succeed? And what will be the real cost of battling Evil? To India? And to Shiva's soul? Discover the answer to these mysteries in this concluding part of the bestselling Shiva Trilogy.

Ummeed

Maine khud se kaha, chal lu thoda sa aur agle mod par wo shayad mera intezaar karte honge. socha bohot chale akele is zindagi k safar me ab sath milega kisi ka, Aisa khayal wo b baar baar karte honge. mai deta rha dilasa jis tarah saalo tak apne dil ko wo b reh reh kar Apne dil ko bekarar karte honge. us mod par pahuch k Pata chala k wo nhi h mai abi b Apne dil ko samjha rha hu fir ek baar Apne dil ko bata rha hu angle mod tak aur thahar ja, hai umeede baki kahi na kahi to wo b humse pyar karte honge