copyrighted image Ariel Gonzalez it is no secret that the Galaxy Note 7, Samsung became the nightmare of the south Korean company over the past few months.
just two weeks of its launch (in August), had already documented over 30 cases of phones that exploded. With time, the situation worsened, until the company had no choice but to call to review the devices and cancel the sales.
The phenomenon was so far reaching that even forced to evacuate an aircraft in the united States and several airlines have banned this model of mobile phones in aircraft.
Samsung has not yet issued the final results of your research, details of which will be published next January 23, but said in October that “detected a problem in the cells of the batteries”, “overheating to contact the anode with the cathode”.
Some scientists take time trying to find a solution to avoid that problem.
And a team of researchers at Stanford University, in the U.S., just given with the solution: a battery that contains in its interior a material that extinguishes the fire if it overheats.
A kind of fire extinguisher inside the phone.
fire Extinguisher built-in
Thanks to a chemical -phosphate of triphenyl (TPP)- that act as retardant of flames , and are released when the capsules covering them reach temperatures of 150 degrees celsius, to avoid the explosion.
During testing, the flames were extinguished in 0.4 seconds.
this is Not the first time that you try to incorporate this kind of chemicals within the batteries, but until now have not been successful.
“security concerns remain an important issue that made it significantly harder for their practical applications,” explain the researchers in the journal Science Advances.
“We have made considerable efforts to resolve this matter [...] but the risk of the battery between in flames continues to exist”.
“With the use of our separators smart the battery performance is not affected,” says Yi Cui, the scientist-in-charge of the project.
The rechargeable lithium-ion (“Li-ion”) began to be marketed in the 1990s inside all kind of technological gadgets, from computers to phones, and use a lithium salt to create the reaction that generates the energy.
A version of smaller size are the batteries of lithium polymer (“LiPo”), with similar characteristics.
latent Risk
Samsung is not the first company that has problems with the lithium batteries, which have also caused explosions in electronic cigarettes, autos Tesla and scooters electric.
According to Hideki Yasuda, an analyst at the Ace Research Institute , Tokyo (Japan), “the manufacturers of smartphones are trying to compress those batteries in supports small and thin“. But “that fashion generates more and more a tendency to overload”.
Ian Fogg, analyst at IHS, says that the technology of the batteries has been slower to evolve that the devices that require them.
“There is an enormous pressure to improve the technology of the batteries. It is one of the areas that is holding back [the advancement of] mobile devices and a number of other products,” said Fogg to the BBC.
“manufacturers have been balancing the demand of consumers for the batteries to last longer and the development of devices more powerful with better graphics and larger screens, with the sophistication of the batteries”.
“it Is very difficult to boost the capacity of the batteries and there is always the risk of a battery in any device to be able to fail”.
But Cui says that his solution is effective: “If there is a leak the thermal retarder is activated, and cut off the fire root,”.
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