source:other news
release time:2022-11-16
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The life of lithium battery is generally measured by the number of charging cycles completed, which is also called "cycle charging times" internationally. The cycle charging times and charging times are different.
The number of times of a cycle charge refers to the process of charging from full to empty, and then from empty to full. For example, the cycle times of a 6000 mA battery refer to the process of discharging 6000 mA+charging 6000 mA. This can not be completed by one charge and discharge, but can be completed by multiple charges and discharges.
1. Mobile phone polymer lithium battery
The polymer lithium battery used in mobile phones has the characteristics of long life, no memory effect and good safety performance. Its positive electrode is generally made of lithium cobalate, lithium manganate, ternary material and lithium iron phosphate, and its negative electrode is made of graphite. The electrolyte is generally polymer gel electrolyte solution. Its theoretical life at room temperature is 500-800 cycles of charging.
In actual use, it has a lot to do with temperature, overcharge and overdischarge. Too high temperature will shorten the battery life and even cause explosion.
Overdischarge and overcharge will also shorten the battery life. Therefore, in actual use, it is good to have 400-700 times. Assuming that the charging cycle is consumed once every 2 days, the service life is basically 2-4 years. When the service life runs out, the battery will become very durable.
2. Three element lithium battery for automobile
The lithium battery used in automobiles is a power battery. Generally, it is a ternary lithium battery. Its positive electrode is usually made of lithium nickel cobalt manganate or lithium nickel cobalt aluminate, and its negative electrode is made of graphite.
The theoretical life is generally 1000-2000 cycles. If the battery pack of the car is consumed once every 2 days, the service life will also be 5-10 years. However, the actual service life will be lower because the actual service conditions cannot meet the theoretical conditions. About 4-8 years.
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