In 1973, Martin Cooper, who invented the first mobile phone, Big Brother, used bulky nickel-cadmium batteries. This type of battery was inexpensive, the raw materials were readily available, and it was fully capable of meeting the call needs of the time.
However, this kind of battery is huge, weighing more than 1 kilogram alone, which occupies almost half of the entire volume of the phone. In addition, nickel-cadmium batteries also have an obvious flaw - the "memory effect".
In other words, if the user starts using the battery without charging it completely, the capacity of the battery will always stay at the amount of power used at the first time, and the full capacity cannot be used.
Therefore, the older generation often earnestly advises new users to be sure to fully precharge the mobile phone battery they just bought, just like "opening meat" to the battery, so as to "unlock" the full capacity of the battery.
Otherwise, without proper pre-charging, the capacity of the battery is permanently limited to a lower level. At that time, users only required the battery to support calls, and the requirements for the battery were relatively simple.
Later, with the increasing functions of mobile phones and the continuous improvement of battery technology, it gradually got rid of the limitations of early batteries and brought greater convenience to people's lives.
In the 1990s, with the continuous enrichment of mobile phone functions, users have higher and higher requirements for mobile phones, not only need to support calls, but also need to support longer standby time.
Simple nickel-cadmium batteries are no longer sufficient to meet this need. As a result, the second-generation nickel-metal hydride battery replaced the bulky nickel-cadmium battery and began to be widely used in mobile phones.
Compared to nickel-cadmium batteries, nickel-metal hydride batteries are smaller and 15% lighter, which is significant for improved portability. At the same time, it also provides a longer talk time of 30-60 minutes, which greatly extends the battery life of the phone.
In addition, nickel-metal hydride batteries have no obvious memory effect and can be charged at any time according to demand, without cumbersome step restrictions, which brings great convenience to users.
However, nickel-metal hydride batteries also have the problem of heat swelling due to overcharging. In order to prevent safety accidents, some mobile phone brands at that time would remind users in the manual that the charger should be unplugged immediately after the battery is fully charged, and the power should be cut off in time, which can avoid part of the memory effect and prolong the battery life.
It can be said that the advent of nickel-metal hydride batteries has promoted the improvement and update of mobile phone functions, and also made users' requirements for mobile phone batteries no longer just stop at supporting calls, but began to consider longer battery life to adapt to the enhancement of mobile phone functions.
At the end of the 90s, the third generation of lithium-ion batteries was finally developed and soon became the battery of choice for today's smartphones. Compared with nickel-metal hydride batteries, lithium-ion batteries use more advanced materials and structures.
It uses layered lithium cobalt oxide as the positive electrode and carbon as the negative electrode. During the charging and discharging process, lithium ions can flow freely between the two poles, realizing the storage and release of electrical energy.
This new working principle makes lithium batteries have many significant advantages - smaller size, no memory effect, and can be charged and discharged at any time without affecting the battery capacity.
In particular, there is no memory effect, which greatly facilitates the normal use of users. Instead of charging only when the battery is depleted, users can now charge their phones at any time, even if they have half of the battery left, without worrying about shortening the battery life.
It can be said that the emergence of lithium batteries has completely subverted people's Xi of using mobile phone batteries. At the same time, it has also promoted the development of smartphone technology, meeting the growing demand for mobile phone functionality and battery life.
However, lithium batteries also have certain safety hazards, and explosion accidents may occur in high-temperature environments. Therefore, users also need to pay attention to avoid charging and using at high temperatures.
In general, the birth of lithium batteries is an important innovation in the history of mobile phone battery technology, and it also makes smart phones truly an indispensable technology product in people's lives.
With the widespread popularity of smartphones, there have been incidents of mobile phone battery explosions in recent years. There may be many reasons for this problem, in addition to the high ambient temperature and improper operation by users, it is also related to the design and manufacturing defects of some brands.
In order to reduce costs, some small brands cut corners in material selection and process flow, which buries potential safety hazards. In addition, with the extension of the use time of the mobile phone, the charging efficiency of the battery decreases, and it is also more prone to safety accidents.
Therefore, it is important to choose a mobile phone with a big brand that is more secure. In addition, when you find that the battery capacity of your mobile phone has deteriorated significantly, you should consider replacing it with a new battery in time, which is also a very necessary step.
However, it should be noted that the battery replacement must be carried out at a regular maintenance point, and must not be disassembled and assembled by yourself, otherwise improper operation is likely to cause a short circuit or even explosion.
In daily use, you should also pay attention to keeping the phone clean to avoid dust blocking the heat dissipation holes or liquid flowing into the battery area and causing accidents. Now many children will use smart phones, parents need to educate them on safety, cultivate correct use Xi, pay attention to waterproof and dustproof measures, avoid excessive use of mobile phones for a long time, in order to reduce potential safety hazards.
From Big Brother in the 70s of the last century to the current smartphones, mobile communication technology has made great progress, and battery technology has also achieved a huge leap from simple to complex.
We should recognize the characteristics of battery technology in different periods and use it scientifically and rationally in order to maximize the effectiveness of the battery and avoid some potential safety hazards.
When choosing a mobile phone, consumers should not just blindly pursue a certain brand, but should examine the design concept of the product, battery quality and other aspects of information, and choose a relatively reliable product.
Pay attention to the correct charging method in daily use, follow the advice of experts, and recharge after the power level drops to a certain level, so as to avoid frequent cycles from full to exhausted to cause damage to the battery.
At the same time, it is necessary to keep the mobile phone clean, waterproof and dustproof, and do not charge and use it in a high-temperature environment for a long time to reduce potential safety hazards.
On the other hand, while enjoying the convenience of life brought by smartphones, you should also pay attention to controlling the use time and not indulging in it. Parents should guide their children and let them establish a scientific concept of use.
Let the smartphone truly become a tool to enrich our lives, rather than the "electronic opium" that controls our lives.
In short, choosing high-quality products and using them rationally can not only give full play to the advantages of advanced technology, but also avoid its potential risks to the greatest extent. In this way, smartphones can create more beautiful possibilities for human society.