With the rapid popularization of smart phones, people have become more and more dependent on mobile phones. In today's society, mobile phones are no longer a simple communication tool, they have almost become one of the necessities in our life. However, with the development of mobile phone hardware, smart phones have become more and more power consumption, gradually showing the lack of endurance in the era of functional phones Whether it's iOS or Android, charging mobile phones every day is like brushing your teeth, something you don't want to do but have to do. Many manufacturers also admit that batteries have become one of the biggest obstacles restricting the development of mobile phones. So where is the future of smart phone batteries? Is there a better choice than lithium battery? Now let me take you to see the new batteries that "may" become mobile phone batteries in the future.
Fuel cell phone
Fuel cell is regarded as one of the development directions of mobile phone battery in the future by the industry. Compared with traditional battery, micro fuel cell is gradually becoming a focus of new battery technology development in the future due to its advantages of high capacity, portability, environmental protection, etc. The fuel cell no longer needs to be charged, just need to add fuel. The capacity of the direct methanol fuel cell will be 10 times that of the ordinary lithium battery. The mobile phone can be charged for one month without the need to add new fuel when charging.
Recently, KDDI finally took action. The company officially displayed its prototype fuel cell phone. From the picture, we can see that KDDI technicians directly inject high concentration methanol fuel into the phone. In fact, this is a hybrid power supply system. The fuel cell and lithium-ion battery fully guarantee the power supply of mobile phones. By using fuel cells, it can guarantee continuous power supply for up to 320 hours. When the power of the mobile phone is insufficient, all users need to do is to inject special methanol fuel into the mobile phone, which is very convenient. In addition, in terms of environmental protection, small fuel cells still have great advantages, because the fuel comes from sustainable organic resources, and the by-products are mainly water and carbon dioxide. Among them, the carbon dioxide produced by small fuel cells is lower than that produced by fossil fuel combustion. Therefore, experts predict that fuel cells will have broad market space.
This is an environmentally friendly and economical green mobile phone designed by Daizi Zheng for Nokia. It uses Coke as its energy source. The core of the design is a biological battery. Under the action of enzymes, it can convert cola and other drinks into water and oxygen, and generate electricity in the process. The designer claims that such a biological battery can obtain 4-5 times the life of a common lithium battery once it is recharged every time it is recharged with fuel (beverage) - quite good, and technically, it does not seem to be impossible, at least more reliable than Avatar. For example, a Japanese company launched the Nopopo liquid battery last year, It has been realized to add water, cola, beer and even urine to generate electricity.
Different from the potential pollution caused by the failure of traditional batteries, the only products of Zheng's Nokia "Coke" mobile phone are water and oxygen when the power is exhausted.
Super capacitor mobile phone
At present, cell phone batteries generally use lithium batteries and nickel cadmium batteries for power supply. But these two kinds of batteries have inherent defects because they are batteries. For example, waste batteries pollute the environment, and high current charging will damage the batteries. Supercapacitor is a capacitor with a capacity up to Farad level. It has the inherent characteristics of capacitance, such as charging life of more than 100000 times, ampere level current charging, and no danger of overcharging. It also has the characteristics of large energy volume ratio, and is known as green energy. Among them, the advantage of high current charging is particularly prominent, because although some lithium batteries can also be charged with high current, the loss of the battery is quite serious, and the capacitance is not. Since the electric energy contained in the equivalent volume super capacitor is close to the capacity of the lithium battery, the super capacitor can be used as an independent power supply.
The overall circuit structure is shown in Figure 2. It includes charging circuit (left dotted box) and working discharge circuit (right dotted box). These two parts are independent of each other. When the power of the super capacitor drops to a certain value, it will be charged by the charging circuit. Since the capacitor can be charged with large current, this process can be completed in a few minutes. After charging, the capacitor can work normally after being connected to the working discharge circuit. Super capacitors are 2.5 V and 300 F, while ordinary mobile phones require 3 6 V voltage supply, so it is necessary to use the step-up circuit 1 to increase the voltage value. In addition, the process of capacitor natural discharge is the process of voltage decreasing along the exponential law. To obtain a constant voltage, it is necessary to control the discharge time of the capacitor through the control circuit. Since the control chip is also powered from the super capacitor, an independent boost circuit 2 is used to supply power to it in order not to cause interference. Finally, in order to maximize the discharge efficiency of the capacitor, the voltage of the capacitor is increased to 6 V through the boost circuit 1, and then it is reduced to 3 6 V, so that it can be connected to the mobile phone to supply negative power again. The supercapacitor of CAP-XX Company in Australia uses nanoscale carbon particles to store and release energy. The supercapacitor can provide higher transient power than the battery pack and store higher energy than the traditional capacitor. CAP - XX design engineers have designed different styles for several popular camera phones in the current market. The product designed for the Nokia N73 mobile phone uses a 1.2mm thick dual monomer supercapacitor to replace the existing four high-power LEDs, without any change in the shape of the mobile phone. In this way, it takes 16 ms for the mobile phone without super capacitor to output 1 W power, while the modified mobile phone can provide 15 W power in the same time.
Solar cell phone
Solar cells are also one of the development directions of smart phone batteries. With more and more functions of smart phones, such as watching movies, GPS navigation, games, etc., a lot of power is consumed. It is fashionable, environmentally friendly, economical and practical to charge smart phones in the sun. Solar cells have attracted much attention because they can solve the problem of outdoor charging.
Recently, a small American startup called Wysips has come up with a relatively complete solution. The transparent coating with a thickness of less than 100 microns is covered on the mobile phone screen, which can capture solar energy and support the energy consumption of the whole mobile phone. According to the introduction of the president of the company, using this charging method, it only takes six hours to fully charge a cell phone battery outdoors. Their next generation products can support 30 minutes of talk time per hour of charging. For mobile phone designers, this transparent coating is very elegant. It can make mobile phones lighter and thinner - as we all know, fat batteries occupy most of the space of smart phones.
After reading it, we have a deeper understanding of whether the cell phone battery is an energy problem. In fact, not only smart phones are facing the energy problem, but now all industries are facing the energy crisis. Oil prices are rising, manufacturing costs are getting higher as they get older, and our cost of living is also increasing. The "energy crisis" is now the primary problem that many countries are focusing on solving.
