Lithium ion battery
Time： 2019-06-11 15:55:24
From the explosion of Samsung Note 7 to the automatic shutdown of Apple's iPhone 6S in recent years, two of the world's largest smartphone companies have broken down on battery issues. With the rapid iteration of screen, motherboard and computing speed, smartphones increasingly expose a short board, battery technology, which may be difficult to overcome in a year or two.
Why is the bottleneck battery in Smartphone development a nightmare for mobile phone manufacturers?
Small batteries tripping technology giants
Although Samsung has not yet made clear the exact cause of the Note 7 explosion, the truth is not far away from outside speculation. Samsung crammed many new technologies into Note 7, such as handwriting pens, frameless displays, iris recognition, and rushed to market before Apple's new iPhone, ignoring battery safety.
In order to meet the needs of users for longer endurance, Samsung increased the battery capacity of Note 7 from 3000 mAh of Note 5 to 3500 mAh, which made the battery smaller and added the fast charging function, which put a test on the manufacturing technology and technology of the battery.
Samsung said in a statement issued by Samsung: "We learned from our investigation that there is an isolated problem with battery batteries. When the positive and negative electrodes of the battery contact, the battery cell will overheat. This is due to a very rare manufacturing process problem. "
In contrast, Apple is relatively conservative in updating smartphone batteries. The battery capacity of the 6S is only 1 715 mAh and the Plus of the 6S is only 2 750 mA, but this does not prevent the problem of the battery.
The recent massive auto-shutdown of the iPhone 6S eventually forced Chinese users to take steps to replace some of the problematic cell phone batteries.
In fact, the headache of lithium batteries is not unique to the smartphone industry. It can be said that the safety and reliability of lithium-ion batteries have become the sword of Damocles of many technological giants. At present, no technology company in the world can guarantee the safety of lithium batteries by 100%, and the recall of new products due to battery defects is not rare.
As early as 2006, Dell recalled 4 million laptops because of battery problems; at the end of 2015, the electric car made by technology giant Tesla was burned by lithium battery spontaneous combustion. In April this year, Toshiba, Japan, was vulnerable to defects in its lithium-ion batteries for laptops.
Mobile phone battery development encounters bottlenecks
How to produce more durable and safe batteries has gradually become a difficult problem to be solved in the smartphone industry.
According to a report released by Deloitte, an IT consulting service company, the battery life of mobile phones will be a key factor affecting consumers'choice to buy mobile phones.
In recent two years, the emergence of fast charging technology has solved the problem of long charging time for mobile phones. However, in terms of battery endurance and safety, the improvement efforts are still very small. With the increasingly comprehensive functions of smart phones, users will have higher and higher requirements for battery performance, but the current technology is still unable to fully meet the needs of users, mobile phone battery technology research and development is encountering bottlenecks.
The problem lies in the nature of lithium batteries. As the lightest metal on earth, lithium carries more electrons than any other metal. At the same time, excessive activity of lithium can easily lead to safety problems, low energy density and high storage cost.
Scientists are trying to solve this problem with new materials and structures. Last year, Apple applied for two new patents, called "Fuel Cell System for Portable Computing Devices" and "Fuel Cell System Coupling for Portable Computing Devices". By name, the two patents suggest that Apple may be exploring the use of fuel cell technology to address the durability of its iPhone, iPad and Macbook computers.
Stanford University in the United States is developing a thin film, after this film treatment, lithium batteries store about five times the total energy of the same quality lithium batteries.
Hot melting recalled 100,000 products.