What is the use of fast charging? The battery is still the obstacle to the development of mobile phone performance
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At MWC2017 this year, Meizu brought a new fast-charging "black technology" - super mcharge, whose 11V/5A 55w charging power amazed people at home and abroad. In recent years, fast-charging technology has developed rapidly, including VOOC, QC 3.0 and other fast-charging technologies. However, looking back at mobile phone batteries, while the performance of other components has rapidly improved, battery technology has not made a huge breakthrough. While fast-charging technology is developing, where is the road to battery technology development? The history of mobile phone battery development To explore mobile phone batteries, we must start with the development of mobile phone batteries. At present, mobile phone batteries have mainly gone through three stages: nickel-cadmium batteries, nickel-metal hydride batteries and lithium batteries. Nickel-cadmium batteries The earliest battery used in mobile phones should be nickel-cadmium batteries. The "big brother" that often appeared in Hong Kong and Taiwan movies in the 1980s used nickel-cadmium batteries. This nickel-cadmium battery has two major problems: the first is that this battery is very large, almost accounting for half of the volume and weight of the entire mobile phone, which makes the early mobile phones very large. The "big brother" uses nickel-cadmium batteries. The second problem is the "memory effect" of nickel-cadmium batteries. Many people should still remember that mobile phone batteries must be discharged before they can be charged, otherwise the battery capacity will become much smaller, and even a full charge will not take a few hours. In addition, nickel-cadmium batteries are easy to change during use, and cadmium is toxic, so a new type of battery is urgently needed. Nickel-metal hydride battery The second one to enter the historical stage is the nickel-metal hydride battery. In 1898, nickel-metal hydride batteries began to be used in mobile phones. Nickel-metal hydride batteries are lighter, thinner, non-toxic, and have a higher energy density than nickel-cadmium batteries. They have made great progress, and the memory effect of the battery has been greatly reduced. However, the problem of heating still exists, and it will still deform. NiMH battery Lithium battery The emergence of lithium battery is epoch-making for mobile phones. Lithium battery is a battery with "lithium" as the negative electrode material, mainly divided into lithium metal battery and lithium ion battery. At present, the mobile phone batteries we commonly use are generally lithium ion batteries. Lithium ion batteries are very light, and the energy density is 30% higher than that of nickel-hydrogen batteries, and there is no memory effect. Later, lithium polymer batteries appeared after the lithium battery on the iPhone. This type of battery has a higher energy density and does not require a thick shell, which can reduce the volume and weight. Of course, the price of this battery is also quite high. The current situation of mobile phone batteries The lithium battery mentioned above is the mobile phone battery that we are now widely popularizing. However, after the emergence of color screen mobile phones, especially smart phones, the power consumption of mobile phones is increasing, and traditional batteries can no longer meet daily needs. Although battery technology is also constantly improving, compared with the rapid development of mobile phone processors, memory, screen technology, etc., the development of batteries is very slow. In the future, it is very likely that battery technology will restrict the development of mobile phone technology. Battery technology restricts the development of mobile phones. The battery capacity of flagship models of major manufacturers is generally around 3000mAh, which should be enough for a day's work under normal use. In addition, people generally use fast charging technology and power banks to solve the problem of mobile phone battery life. Wireless charging technology equipped in a few flagship products has also alleviated the pressure of battery life to a certain extent. Fast charging technology has been very popular in the past two years . Where is the development of mobile phone batteries going ? So, what will the development of mobile phone batteries be like in the future? At present, major manufacturers have two ways to solve the battery dilemma. The first way is to improve on the basis of the original lithium battery. At present, mobile phones generally use non-removable batteries, so that the battery can save extra outer packaging and have a larger battery capacity under the same volume. At the same time, several major battery manufacturers led by Samsung are also researching new technologies to advance lithium battery technology. How far is the graphene battery from commercial use? Another way is to find new materials to apply to batteries to expand battery capacity. At present, there have been experiments on graphene as battery electrodes, using graphene to replace the original graphite as electrodes to achieve the purpose of battery expansion. However, due to the high price of graphene, it is still unaffordable to put it into mass production at present. So at present, the best way out is to make a fuss about lithium batteries, and improve the original lithium-ion batteries to increase battery capacity. Tips for use Below, I will introduce some tips for daily use of mobile phone batteries, hoping to help you better use and protect mobile phone batteries. Issues to note when charging mobile phones We often heard before that "new mobile phones need to be charged for 12 hours for the first time" and "charge the mobile phone after it runs out of power." In fact, these practices are "bad habits" developed during the nickel-cadmium battery period. In fact, the lithium batteries used in mobile phones now have no memory effect and do not need to be charged after the power is used up. Moreover, the battery life is generally 1000 to 2000 cycles. The so-called one cycle is a process from 0 to 100%, so try not to wait until the power is too low before charging during use. Will it damage the battery if it is plugged in all the time? Current batteries and mobile phones have adopted battery protection measures. After the battery is fully charged, it will automatically stop charging, and the battery life will not be damaged due to overcharging. However, the charging protection circuit is likely to be damaged and fail during our long-term use, so in our daily use, we should still unplug the power supply in time after the battery is fully charged. Pay attention to battery protection The previous Samsung Note7 explosion incident made us feel scared. The reason for battery heating is not the defects of the battery itself. Generally, the battery heats up when it is used during charging, or the battery reacts and heats up after contacting water. In our daily life, we should treat the battery with care, avoid contact with water, and keep unused batteries in a dry and low temperature place. As a winner of Toutiao's Qingyun Plan and Baijiahao's Bai+ Plan, the 2019 Baidu Digital Author of the Year, the Baijiahao's Most Popular Author in the Technology Field, the 2019 Sogou Technology and Culture Author, and the 2021 Baijiahao Quarterly Influential Creator, he has won many awards, including the 2013 Sohu Best Industry Media Person, the 2015 China New Media Entrepreneurship Competition Beijing Third Place, the 2015 Guangmang Experience Award, the 2015 China New Media Entrepreneurship Competition Finals Third Place, and the 2018 Baidu Dynamic Annual Powerful Celebrity. |
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