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Why does the battery need to be used frequently to achieve its maximum performance?

by:dcfpower     2021-03-13

If the traditional nickel battery is charged for too long, the liquid in the nickel battery will crystallize, preventing the charger from fully charging. In this way, in order to maximize its performance, it must be fully charged or discharged regularly. For lithium batteries, we can charge lithium-ion batteries at any time at a convenient time, without the hassle of nickel batteries.

Myth about the life of lithium batteries: Lithium batteries can only be charged 300 to 500 times, and then they need to be replaced.

The correct statement: life is related to the number of completions of the charging cycle, not directly related to the number of charging cycles.

A charging cycle means a process in which all the power of the battery is used from full to empty, and then from empty to full. This is not the same as charging once. Its meaning is shown in the figure below.

The above figure shows that 40% is charged first, 20% is charged after a period of time, 30% after the next use, and 20% next time ...In the middle of the 20%, that is, when 10% of the power has just been replenished, a total of one charging cycle has been completed. Then comes the next cycle.

For a simple example, a lithium battery used only half of its power on the first day, and then it was fully charged. If the situation persists the next day, that is, use half of the charge and charge it twice in total. This can only be counted as one charging cycle, not two. Therefore, it may usually take several times to complete a cycle. Every time a charging cycle is completed, the power will decrease a bit. However, the reduction is very small. High-quality batteries will still retain 80% of the original power after being charged for multiple cycles. Many lithium-powered products are still used as usual after two or three years. This is the reason. Of course, the life of the lithium battery will eventually need to be replaced.

The lifespan of lithium batteries is generally 300 to 500 charging cycles. Assuming that the power provided by a complete discharge is Q, if the reduction of power after each charging cycle is not considered, the lithium battery can provide or supplement 300Q-500Q of power in its life. 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 it is charged randomly, the number of times is variable. In short, no matter how it is charged, it is constant to add a total of 300Q to 500Q of power. Therefore, we can also understand it this way: the life of a lithium battery is related to the total charge capacity of the battery, and has nothing to do with the number of recharges. Deep discharge and deep charge and shallow discharge and shallow charge have little difference in the impact on the life of the lithium battery.

In fact, shallow charging and shallow charging are more beneficial to lithium batteries. Only when the product's power module is calibrated for lithium batteries, it is necessary to deep discharge and deep charge. Therefore, products powered by lithium batteries do not need to be constrained by the process. Everything is convenient and can be charged at any time without worrying about affecting the lifespan.

If the lithium battery pack is used in an environment higher than the specified operating temperature, that is, 35°C or higher, the power of the battery will continue to decrease, that is, the battery's power supply time will not be as long as usual. If you have to charge the device 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 the operating temperature as suitable as possible is a good way to extend the life of the lithium battery.

If you use the lithium battery in a low temperature environment, that is, below 4°C, you will also find that the battery life is reduced. The original lithium battery of some mobile phones is even charged in a low temperature environment. Does not power up. But don’t worry too much. This is only a temporary situation, which is different from the use in a high-temperature environment. Once the temperature rises, the molecules in the battery are heated, and they will immediately return to the previous power.

If you want to maximize the effectiveness of lithium-ion batteries, you need to use it frequently, so that the electrons in the lithium battery pack are always in a flowing state. If you don't use the lithium battery often, 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.


Collectively, the effect of custom lithium ion battery on industrial society has been to eliminate custom battery pack manufacturers and drastically reduce the time long associated with custom battery pack manufacturers.
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