How long is the cycle life of a lithium battery?

People have life and death, and lithium battery can be produced and threw away. People call this phenomenon as the cycle life of lithium battery. People have already decided on the limits of life from the date of birth, which can't be changed. However, whether people's daily life habits can expand the limit of extending length; since lithium battery is offline, it also has a limit of life. Similarly, whether the use and maintenance of lithium battery can decide scientifically the lithium battery in extending length within the limit of battery life is still a question. The length described by charging and discharging cycle has different types of lithium ion batteries. Their natural lifespan (that is the theory of charge and discharge cycle) is not consistent. For convenience, we use common cell phone lithium battery in this specification.

People often hear an argument is that the life of the lithium battery is "500", the principle of lithium battery in the sense of "time" refers to the cycle of life, which is a fully charge and discharge cycle, industry test method is: the depth of discharge x rechargeable = cycle life, discharge depth is 80% in value, charge and discharge at least 625 times, 80% x 625 = 625 (times).Discharge depth refers to in the process of the battery, the battery discharge capacity of the percentage of its rated capacity. With 80% depth of discharge, because there is a close relationship between the discretion of the depth of discharge and recharge life, discharge depth is too big, will shorten the battery life. We are in the process of cell phone of daily use, when the mobile phone battery is low, the charge is about to begin. Therefore, the cycle life of 500 times is the theory of lithium battery life.

Because people cannot fully attention to charge the problem in time, so, on a production line of lithium batteries, manufacturers under the condition of the test to test out the theory of life, is not necessarily can reach your battery, for your battery is: the actual charge number x discharge depth = actual battery life. Cycle life concept is clear, we can with the seller/consumer calls "XXX charge" and "charging" x years phase difference.

Selling appliances or logo on battery can be recharged, is based on 80% depth of discharge. So was heard "500 times", thought must put the cell phone battery recharged again, the idea is not scientific in theory, in practice is also wrong, in so doing, would be just as the overcharge or too early to put the battery structure destroyed, shorten the service life of lithium-ion batteries.

Another common phenomenon is that the mobile phone manufacturers often make the battery using a few years, one year warranty commitment, this commitment is actually comes from the battery manufacturers, as the beginning of the article says, how many years can actually use lithium-ion batteries, and is closely related to the correct way of using the lithium battery, in addition to the provisions of the discharge depth (i.e., the discharge) and prevent overcharge, and some factors that can affect the service life of the lithium battery, such as the size of the current and voltage, environment temperature, was idle power to maintain and so on. Need to point out that the natural life of lithium-ion batteries, after all, there is a cap, we usually say of "extension of the lithium battery life" approach, is actually, based on the correct use and maintenance of lithium-ion batteries, lithium batteries to release more to release energy.

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