How long is the life of polymer lithium battery? In fact, this problem is related to many factors, such as the packaging material of lithium polymer batteries, user habits and so on. The current polymer lithium batteries are mostly soft-pack batteries, which use aluminum-plastic film as the outer shell and organic electrolyte inside. Even if the liquid is very hot, they will not explode, because the aluminum-plastic film polymer battery is in a solid or colloidal state without leakage. Crack naturally. Regarding the life of polymer lithium batteries, the correct statement is that the life of lithium batteries is related to the number of charging cycles completed, not directly related to the number of charging times.

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, and each time a charge cycle is completed, the power will decrease a little. But don’t worry, the reduction is very small. A high-quality battery will still retain 80% of its original capacity after multiple charging cycles. Many lithium-ion powered products are still used as usual after two or three years.

The life of a polymer lithium battery is generally 300 to 500 charging cycles. We assume that the power provided by a complete discharge is Q. If the reduction in power after each charging cycle is not considered, the lithium battery can provide a total of or It supplements 300Q-500Q of electricity. It can be known from this 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 random charging, 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 polymer 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 discharge and shallow discharge on the life of polymer lithium battery is not much different.

Strictly speaking, however, shallow discharge and shallow charging are more beneficial to lithium batteries. Only when the power module of the product is calibrated for lithium batteries, is it necessary to deep discharge and deep charge. Therefore, products powered by lithium batteries don’t have to stick to the process, everything is convenient, charge at any time, don’t worry about affecting the life.

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 polymer lithium battery. Therefore, keeping it at a favorable operating temperature is a good way to prolong the life of the polymer lithium battery.

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. Some original lithium batteries in 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.

Finally, I would like to remind everyone: To maximize the performance of the polymer lithium battery, it is necessary to use it frequently so that the electrons in the lithium battery are always in a state of flow. If the lithium battery is not used frequently, it is necessary to complete at least one charging cycle for the lithium battery every month and perform a power calibration.