Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Li-ion batteries do not contain metallic lithium and are rechargeable. Lithium metal batteries, the fifth generation of rechargeable batteries, were born in 1996, and their safety, specific capacity, self-discharge rate and performance-price ratio are superior to lithium-ion batteries. Due to its own high technical requirements, only companies in a few countries are currently producing such lithium metal batteries. Battery Life Lithium-ion batteries can only be charged and discharged 500 times? I believe that most consumers have heard that the life of a lithium battery is "500 times", 500 times of charging and discharging. Does it really prolong the life of the battery if the battery is fully depleted before charging? The answer is no. The life of a lithium battery is "500 times", which does not refer to the number of charges, but a cycle of charge and discharge. A charging cycle means that all the power of the battery is used from full to empty, and then from empty to full, which is not the same as charging once. For example, a lithium battery only used half of its capacity on the first day, and then fully charged it. If it is still the same the next day, that is, charge half of it, and charge it twice in total. This can only be counted as one charging cycle, not two. Therefore, it may usually take several charges to complete a cycle. Every time a charging cycle is completed, the battery capacity will decrease a little. However, the power reduction is very small. High-quality batteries will still retain 80% of their original capacity after being charged for many cycles. Many lithium-ion powered products are still used as usual after two or three years. Of course, lithium batteries still need to be replaced after the end of their life. The so-called 500 times means that the manufacturer has achieved about 625 rechargeable times at a constant discharge depth (such as 80%), reaching 500 charging cycles. (80%*625=500) (ignoring factors such as lithium battery capacity reduction) However, due to various influences in real life, especially the depth of discharge during charging is not constant, "500 charging cycles" can only be used as a reference battery life.Also read:https://www.aimeno.com/lithium-battery-pack/194.html Correct statement: Lithium battery life is related to the number of charging cycles completed, not directly related to the number of charging cycles. Simple understanding, for example, a lithium battery only used half of its power on the first day, and then fully charged it. If it is still the same the next day, that is, charge half of it, and charge it twice in total. This can only be counted as one charging cycle, not two. Therefore, it may usually take several charges to complete a cycle. Every time a charging cycle is completed, the power will decrease a little. However, the reduction is very small. High-quality batteries will still retain 80% of their original capacity after being charged for many cycles. This is the reason why many lithium-ion powered products are still used as usual after two or three years. Of course, the lithium battery life will eventually need to be replaced. The life of lithium batteries is generally 300 to 500 charging cycles. Assuming that the electricity provided by a complete discharge is Q, if the reduction in electricity after each charging cycle is not considered, the lithium battery can provide or supplement 300Q-500Q of electricity in total during its life. From this we know that if you charge 1/2 every time, you can charge 600-1000 times; if you charge 1/3 every time, you can charge 900-1500 times. By analogy, if it is charged randomly, the number of times is indefinite. In short, no matter how much you charge it, it will add a total of 300Q to 500Q of electricity, which is constant. Therefore, we can also understand that the life of a lithium battery is related to the total charging capacity of the battery, and has nothing to do with the number of charging times. The impact of deep charging and shallow charging on the life of lithium batteries is not much different. In fact, shallow discharge and shallow charging are more beneficial to lithium batteries. Only when the power module of the product is calibrated for lithium batteries, it is necessary to deep discharge and deep charge. Therefore, products powered by lithium batteries do not have to stick to the process. Everything is convenient and can be charged at any time without worrying about affecting the lifespan. If the lithium battery is used in an environment higher than the specified operating temperature, that is, above 35°C, the battery power will continue to decrease, that is, the battery power supply time will not be as long as usual. If the device is charged at such a temperature, the damage to the battery will be even greater. Even if the battery is stored in a hot environment, it will inevitably cause corresponding damage to the quality of the battery. Therefore, keeping it at a suitable operating temperature is a good way to extend the life of lithium batteries. If you use a lithium battery in a low-temperature environment, that is, below 4°C, you will also find that the battery life is reduced, and the original lithium battery of some mobile phones cannot even be charged in a low-temperature environment. But don't worry too much, this is only a temporary situation, different from using in a high temperature environment, once the temperature rises, the molecules in the battery will be heated, and the previous power will be restored immediately. To get the most out of a lithium-ion battery, you need to use it frequently so that the electrons in the lithium-ion battery are always in a state of flow. If you do not use the lithium battery frequently, please remember to complete a charging cycle for the lithium battery every month and do a power calibration, that is, deep discharge and deep charge once. The official name is "charge-discharge cycle", which is not equal to "recharge times". Cycle refers to the battery from full charge to empty. This is a cycle. If your battery is fully charged, it uses one-tenth It is one-tenth of a cycle, so charging it 10 times is basically a cycle. Similarly, from fully charged, half used and then fully charged, and then half used and then fully charged, this is also a cycle. At this time, you have charged twice. Therefore, the cycle only depends on "how much electricity is discharged from the battery" and has no direct relationship with the "number of charges". Moreover, the nominal number of charge and discharge cycles does not mean that it cannot be used after it is used up, but that after so many cycles, the battery's ability to store power will drop to a certain extent.Also read:https://www.aminobattery.com/lithium-battery/201.html For example, for a lithium battery, the nominal charge and discharge cycle is "not less than 60% of the nominal capacity after 500 cycles" That is to say, after 500 cycles, the battery can only store 60% of the new battery at most, which means that the performance has dropped to a certain level, which means There is no fixed limit on the number of charging times for lithium batteries. Batteries from regular manufacturers can generally be charged and discharged at least 500 times, and the capacity remains above 80% of the initial capacity. One charge per day can last for 2 years. Usually the mobile phone battery is charged 1000 times, which will cause the battery to be seriously undurable. Mobile phone battery maintenance method:
  1. Fully charge each time, reduce the number of charging, and improve the battery life.
  2. It is not necessary to fully discharge the battery. Usually, the battery needs to be charged when the power is less than 10%.
  3. Use the original charger to charge, do not use the universal charger to charge.
  4. Do not use the mobile phone while the mobile phone is charging.
  5. Do not overcharge, stop charging after the battery is fully charged.
Yes, according to the experimental results, the lifespan of lithium batteries decreases with the increase of charging times. Generally, the charging times of lithium batteries are 2000-3000 times. Cycle is use. We are using the battery, and what we care about is the time of use. In order to measure the performance of how long the rechargeable battery can be used, the definition of the number of cycles is stipulated. The actual user use is ever-changing, because the tests with different conditions are not comparable, and the definition of cycle life must be standardized for comparison. The test conditions and requirements for the cycle life of lithium batteries stipulated in the national standard: under the condition of ambient temperature 20℃±5℃, charge at 1C, when the battery terminal voltage reaches the charging limit voltage of 4.2V, change to constant voltage charging until the charging current is less than Or equal to 1/20C, stop charging, put it aside for 0.5h~1h, then discharge with 1C current to the end voltage of 2.75V, after the discharge, put it aside for 0.5h~1h, and then proceed to the next charge and discharge cycle until two consecutive discharge times If it is less than 36 minutes, it is considered that the life is terminated, and the number of cycles must be greater than 300 times.