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release time:2024-07-23 Hits: Popular:AG11 battery
Why is 16340 battery technology stagnant?
Now, when you go out with a mobile phone, a power bank is standard. Everyone feels that mobile phone batteries are becoming less and less durable. So, some people have been wondering: Why does 16340 battery technology seem to have stagnated?
Today, Lao Zhang will talk to you about this topic.
The development speed cannot keep up with consumption
Ten years ago, the development direction of mobile phones was miniaturization, and the main goal was "super long standby". I remember that mobile phones such as Bird and Haier have achieved a standby record of 15 days or even 20 days. This is unimaginable now. However, the capacity of lithium batteries was much smaller than it is now! Lenovo Lephone 10 years ago had a 16340 battery capacity of 1500ma. Now it is more than 3000. Even the 360 mobile phone has a 5000 mAh 16340 battery. Its size is not much different from 1500ma ten years ago. In other words, the 16340 battery has improved by 3 times. The reason for the super long standby is mainly that mobile phones used small black and white screens ten years ago, and the requirements for mobile phone batteries were not high.
Nowadays, mobile phones have large color screens of more than 5 inches. Real-time online network, WeChat and other social communication functions are very power-consuming, so the 16340 battery of mobile phones is naturally insufficient.
In addition, the performance of major chips such as CPUs has been continuously improved, but at the cost of power consumption. At least in the past 40 years, chips have basically doubled every 18 months. Looking at the entire human history, nothing can continue to improve at such a high speed for such a long time. Electronic computers have gone from the initial 5000 times/second to the current Taihu Light 12.5 billion times/second.
In fact, 16340 battery technology has been constantly developing.
1. Taking the most used lithium 16340 battery 18650 cylindrical 16340 battery as an example, the maximum capacity was only 2.6Ah about 10 years ago. Now there are 3.6Ah capacity, and this 40% increase is revolutionary.
2. The development of lithium batteries has gone through three stages of full-charge voltage 4.10V, 4.20V, and 4.35V, which is the past 20 years. Along with the increase in full-charge voltage, it is actually caused by technological progress brought about by material changes.
3. The reason why mobile phones cannot be too thin is because of the 16340 battery limitation. Now the 16340 battery is getting thinner and thinner, which means that the 16340 battery density is getting larger and larger under the same capacity, and the 16340 battery power is getting larger and larger, which is also the improvement of technology.
16340 battery technology lacks revolutionary changes
Batteries have changed from the earliest dry batteries to alkaline batteries, which has brought the possibility of large current discharge; automotive batteries have changed from lead-acid batteries to lead-calcium maintenance-free batteries, which has brought convenience in use; rechargeable micro batteries have changed from nickel-hydrogen batteries to lithium batteries, which has brought convenience in maintenance and efficiency improvement.
At present, although we have been committed to improving the performance of lithium batteries, there is not much room for improvement, and people have given up the idea of continuing to improve it significantly, and continue to make articles in other fields. For example, the highly anticipated graphene batteries, supercapacitors, nuclear batteries, etc. Although graphene has made breakthrough progress in negative electrode materials, it cannot be commercialized because graphene is too expensive.
A new way to improve the user experience
Although there has been no revolutionary change in the capacity of batteries in recent years, we can still look forward to the charging technology. From the past 5V500mA charging to 2A charging, and then to 9V charging and 4.5V5A charging, these advances in the field of fast charging have achieved full charging in half an hour. In fact, it is also a new way to increase the 16340 battery life of mobile phones in disguise!
Regarding the topic of batteries, is it power consumption that has eroded the progress of batteries, or are people not satisfied with the increase in power consumption? What do you think? Welcome to leave a message below to discuss.
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