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How long is the life of a polymer lithium battery ?

As global pollution becomes more and more serious, energy conservation and environmental protection have become the top priority today. How to save energy and how to protect the environment? Starting from the daily necessities of human beings, there are many products that pollute the environment on the market, and it is fundamental to start from these products. In the battery market, the lithium battery is a superstar. It is fast-occupied by consumers because of its long service life, complete charge and discharge, no memory effect, and no pollution.

 

polymer lithium battery

 


Since the electrolyte materials constituting the lithium ion battery have their own advantages, the lithium ion battery is classified into a polymer lithium ion battery and a liquid lithium ion battery. The polymer lithium ion battery is the same as the positive and negative materials of the liquid lithium ion battery, and the battery works similarly, and the electrolytes are different from each other. The polymer lithium battery is light in weight, strong in energy storage capacity, and good in discharge performance, and can be manufactured into various shapes and has a long life. The electrolyte of the polymer lithium battery is a solid electrolyte, and the polymer lithium battery can cause various shapes to improve the specific capacity of the battery with respect to the liquid electrolyte of the liquid lithium ion battery.

So, how long does the polymer lithium battery last? Under the global unified standard, the battery life is not expressed by time, but by the number of cycles, that is, the complete discharge of the electricity once, the general lithium battery is between 500-800 times, A polymer battery can Up to 800 times. Therefore, the quality of the battery of the selected battery supplier will be guaranteed, and the service life will be longer.

If a lithium-ion battery is used in a high-temperature environment, such as a temperature above 350C, the amount of battery stored will continue to decrease, resulting in a battery that does not last as long as it is in a normal temperature environment. Charging the battery in such a high temperature environment will cause a great degree of damage to the battery, thus greatly affecting the battery life. Even charging in a high temperature environment can cause different degrees of damage to the battery, so try to avoid charging the battery in a high temperature environment. If the battery is charged in a low temperature environment, such as in an environment below 40C, the battery will still be damaged.

If the polymer lithium-ion battery is not charged for a long time, it will reduce its life. Polymer lithium-ion batteries need to reach their ideal lifetime when the electrons remain flowing for a long time. The commercial production technology of polymer lithium-ion batteries in the world is not very mature, and the current market share is not high.


Lithium polymer battery (Li-polymer, also known as polymer lithium battery): It is also a kind of lithium ion battery, but it has higher energy density, smaller size and thinner than liquid lithium battery (Li-ion). A variety of obvious advantages, such as lightweight, high security, is a new type of battery. In terms of shape, the lithium polymer battery has an ultra-thinning feature and can be fabricated into a battery of any shape and capacity in accordance with the needs of various products. The battery can reach a minimum thickness of 0.5mm. Its nominal voltage, like Li-ion, is also a nominal voltage of 3.7V with no memory effect.

A simple understanding, for example, a lithium battery used only half of the electricity on the first day, and then fully charged. If it is still the next day, it will be charged in half, and it will be charged twice in total. This can only be counted as one charging cycle, not two. Therefore, it is usually possible to complete a cycle after several charges. Each time a charge cycle is completed, the amount of power is reduced a little. However, the reduction is very small. After a high-quality battery has been charged for many cycles, it will still retain 80% of the original power. Many lithium-powered products are still used after two or three years, which is why. Of course, the life of the lithium battery will eventually need to be replaced.

The life of lithium batteries is generally 300 to 500 charge cycles. Assuming that the amount of electricity supplied by a full discharge is Q, if the power consumption is reduced after each charging cycle, the lithium battery can provide or supplement 300Q-500Q power in its lifetime. From this we know that if you charge 1/2 each time, you can charge 600-1000 times; if you charge 1/3 each time, you can charge 900-1500 times. By analogy, if you charge randomly, the number of times is variable. In short, no matter how charged, it is constant to add a total of 300Q ~ 500Q power. Therefore, we can also understand that the life of the lithium battery is related to the total charge of the battery, regardless of the number of times of charging. The effect of deep deep charge and shallow charge on lithium battery life is not much different.

In fact, shallow shallow charge is more beneficial for lithium battery. Only when the power module of the product is calibrated for lithium battery, it is necessary to deep charge. Therefore, products that use lithium-ion power supply do not have to be constrained by the process. Everything is convenient and can be charged at any time without worrying about affecting life.

If lithium is used in an environment above the specified operating temperature, ie above 35 °C, the battery's power will continue to decrease, ie the battery will not be as long as usual. If the device is to be charged at such a temperature, the damage to the battery will be greater. Even if the battery is stored in a hot environment, it will inevitably cause damage to the quality of the battery. Therefore, trying to maintain a favorable operating temperature is a good way to extend the life of the lithium battery.

If you use lithium battery in a low temperature environment, that is, below 4 °C, you will also find that the battery life is reduced. Some mobile phones' original lithium batteries are not charged even in low temperature environments. But don't worry too much. This is only a temporary situation. Unlike the use in high temperature environment, once the temperature rises, the molecules in the battery are heated and immediately return to the previous power.
In order to maximize the performance of a lithium-ion battery, it is necessary to use it frequently so that the electrons in the lithium battery are always in a flowing state. If you do not use lithium batteries frequently, please remember to complete a charging cycle for the lithium battery every month, do a power calibration, that is, deep charge deep charge once.

At present, the market price of polymer lithium ion batteries is higher than that of liquid lithium ion batteries. Because of its long life and good safety performance compared with liquid lithium ion batteries, it is believed that there will be a large room for improvement in the near future. The correct statement: Lithium battery life is related to the number of completions of the charge cycle, and is not directly related to the number of charge cycles.



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