Why is your mobile phone battery dead so fast? Scientists say this
According to the Daily Mail, with the popularity of smartphones, many people have been living in fear of running out of battery batteries.
Although device manufacturers have consistently claimed that their battery life has improved, your phone often makes you feel that it is on the verge of "death."
Scientists say this is likely to be the result of "capacity decay." Every time you charge the battery in your phone, you waste a certain amount of energy. So, whenever you rush to charge your smartphone battery, it's actually making the battery life worse – you think it's always running out of power.
Although researchers continue to make batteries charge faster and last longer, they can't make a truly long-lasting battery.
Professor Steve Martin of Iowa State University wrote that no matter how hard the engineers work, the battery won't last forever.
Although researchers continue to make batteries charge faster and last longer, it is impossible to make a truly permanent battery (data map)
The following is an article by Professor Steve Martin. If you read it carefully, you may understand the meaning more:
Why do batteries die? And why do they only need to be recharged so many times that they don't have enough power?
A few years ago, my young son asked me that his battery-powered toy car stopped and he wanted to know what the so-called "permanent battery" was.
The same problem may also occur in the minds of every mobile phone user who wants to send the last text message before the screen flickers.
Like my research, the world continues to study how to make batteries charge faster, last longer, and charge and discharge more often than they do today.
[Capacity attenuation]
But no matter how much you and I think, it is impossible to create a truly durable battery. I have been teaching thermodynamics for more than 30 years. So far, there is no evidence that we can break the basic laws of science to get this elusive battery.
Battery scientists and engineers say the main problem is capacity decay. Ordinary people will ask: "Why can't my battery be charged?" There are some complaints, such as "I just charged it, it ran out again!"
This is the result of the second law of thermodynamics, which states that when certain real processes occur, it produces a certain amount of wasted energy that can never be recovered.
Every time the battery is charged or discharged, there is a little waste of energy - there is a little energy wasted in the battery and it cannot be recovered.
The main problem is "capacity attenuation." This basically means that a certain amount of energy is wasted when you charge the battery.
To imagine how this works, consider the use of batteries, such as transferring water between two cups. Using a battery is like pouring water from one cup into another. Charging the battery is to pour the water back into the first cup.
Even if you do it one or two times, you don't have a drop, and there is a little bit left in each cup. You can't pour it out.
Now imagine that in two or three years (for cell phone batteries) or 10 to 20 years (for electric cars), you will have hundreds or even thousands of times.
[Energy will be wasted over time]
As time goes by, there will be quite a lot of water disappearing. Even a drop of almost invisible droplets—such as a tenth of a milliliter—will add up to a full liter if it occurs 10,000 times.
This does not include the possibility that a cup will lose more moisture to some extent, such as leaking a hole or heating to cause evaporation.
Just as water is inevitably lost from one cup to another, the energy required to charge the battery is more than the actual energy stored in the battery, and the energy flowing out of the battery is less than the energy stored in the battery. . The ratio of wasted energy to stored energy increases over time.
In fact, the more you charge the battery, the more energy is wasted, and the faster the battery will fail, the more it will not charge.
I and others are working on various methods to make these unloading-recharging cycles run more smoothly to reduce waste, but the second law of thermodynamics will always ensure that there is no way to get rid of it completely.
Steve Martin is a professor of materials science and engineering at Iowa State University.
Follow Me
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Although device manufacturers have consistently claimed that their battery life has improved, your phone often makes you feel that it is on the verge of "death."
Scientists say this is likely to be the result of "capacity decay." Every time you charge the battery in your phone, you waste a certain amount of energy. So, whenever you rush to charge your smartphone battery, it's actually making the battery life worse – you think it's always running out of power.
Although researchers continue to make batteries charge faster and last longer, they can't make a truly long-lasting battery.
Professor Steve Martin of Iowa State University wrote that no matter how hard the engineers work, the battery won't last forever.
Although researchers continue to make batteries charge faster and last longer, it is impossible to make a truly permanent battery (data map)
The following is an article by Professor Steve Martin. If you read it carefully, you may understand the meaning more:
Why do batteries die? And why do they only need to be recharged so many times that they don't have enough power?
A few years ago, my young son asked me that his battery-powered toy car stopped and he wanted to know what the so-called "permanent battery" was.
The same problem may also occur in the minds of every mobile phone user who wants to send the last text message before the screen flickers.
Like my research, the world continues to study how to make batteries charge faster, last longer, and charge and discharge more often than they do today.
[Capacity attenuation]
But no matter how much you and I think, it is impossible to create a truly durable battery. I have been teaching thermodynamics for more than 30 years. So far, there is no evidence that we can break the basic laws of science to get this elusive battery.
Battery scientists and engineers say the main problem is capacity decay. Ordinary people will ask: "Why can't my battery be charged?" There are some complaints, such as "I just charged it, it ran out again!"
This is the result of the second law of thermodynamics, which states that when certain real processes occur, it produces a certain amount of wasted energy that can never be recovered.
Every time the battery is charged or discharged, there is a little waste of energy - there is a little energy wasted in the battery and it cannot be recovered.
The main problem is "capacity attenuation." This basically means that a certain amount of energy is wasted when you charge the battery.
To imagine how this works, consider the use of batteries, such as transferring water between two cups. Using a battery is like pouring water from one cup into another. Charging the battery is to pour the water back into the first cup.
Even if you do it one or two times, you don't have a drop, and there is a little bit left in each cup. You can't pour it out.
Now imagine that in two or three years (for cell phone batteries) or 10 to 20 years (for electric cars), you will have hundreds or even thousands of times.
[Energy will be wasted over time]
As time goes by, there will be quite a lot of water disappearing. Even a drop of almost invisible droplets—such as a tenth of a milliliter—will add up to a full liter if it occurs 10,000 times.
This does not include the possibility that a cup will lose more moisture to some extent, such as leaking a hole or heating to cause evaporation.
Just as water is inevitably lost from one cup to another, the energy required to charge the battery is more than the actual energy stored in the battery, and the energy flowing out of the battery is less than the energy stored in the battery. . The ratio of wasted energy to stored energy increases over time.
In fact, the more you charge the battery, the more energy is wasted, and the faster the battery will fail, the more it will not charge.
I and others are working on various methods to make these unloading-recharging cycles run more smoothly to reduce waste, but the second law of thermodynamics will always ensure that there is no way to get rid of it completely.
Steve Martin is a professor of materials science and engineering at Iowa State University.
Follow Me
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