The difference between polymer lithium battery and lithium battery

A lithium-ion battery is generally referred to as a polymer lithium-ion battery. Lithium-ion batteries are classified into liquid lithium-ion batteries and polymer lithium-ion batteries or plastic lithium-ion batteries according to the electrolyte materials used in lithium-ion batteries. Do you know the difference between polymer lithium battery and lithium battery?

7 points to see the difference between polymer lithium battery and lithium battery

First, the difference between polymer lithium battery and lithium battery

Compared to lithium-ion batteries, lithium polymer batteries have the following characteristics:

1. No battery leakage problem, the battery does not contain liquid electrolyte inside, using colloidal solids.

2. Can be made into a thin battery: with a capacity of 3.6V400mAh, its thickness can be as thin as 0.5mm.

3. The battery can be designed in a variety of shapes.

4. The battery can be bent and deformed: the polymer battery can be bent up to 900 or so.

5. It can be made into a single high voltage: liquid electrolyte battery can only be connected in series with several batteries to obtain high voltage, polymer battery.

6. Since there is no liquid in itself, a multi-layer combination can be made in a single piece to achieve a high voltage.

7. The capacity will be twice as high as the same size lithium-ion battery.

Second, the life of polymer lithium battery

The correct statement: Lithium battery life is related to the number of completion of the charge cycle, and is not directly related to the number of charge cycles.

A simple understanding, for example, a lithium battery used only half of the electricity on the first day, and then fully charged. If it is still the next day, it will be charged in half, and it will be charged twice in total. This can only be counted as one charging cycle, not two. Therefore, it is usually possible to complete a cycle after several charges. Each time a charge cycle is completed, the amount of power is reduced a little. However, the reduction is very small. After a high-quality battery has been charged for many cycles, it will still retain 80% of the original power. Many lithium-powered products are still used after two or three years, which is why. Of course, the life of the lithium battery will eventually need to be replaced.

The life of lithium batteries is generally 300 to 500 charge cycles. Assuming that the amount of electricity supplied by a full discharge is Q, if the power consumption is reduced after each charging cycle, the lithium battery can provide or supplement 300Q-500Q power in its lifetime. 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 you charge randomly, the number of times is variable. In short, no matter how charged, it is constant to add a total of 300Q ~ 500Q power. Therefore, we can also understand that the life of the lithium battery is related to the total charge of the battery, regardless of the number of times of charging. The effect of deep charge and shallow charge on lithium battery life is not much different.

In fact, the shallow charge is more beneficial for a lithium battery. Only when the power module of the product is calibrated for lithium battery, it is necessary to deep charge. Therefore, products that use lithium-ion power supply do not have to be constrained by the process. Everything is convenient and can be charged at any time without worrying about affecting life.

If lithium is used in an environment above the specified operating temperature, above 35 °C, the battery's power will continue to decrease, ie the battery will not be as long as usual. If the device is to be charged at such a temperature, the damage to the battery will be greater. Even if the battery is stored in a hot environment, it will inevitably cause damage to the quality of the battery. Therefore, trying to maintain a favorable operating temperature is a good way to extend the life of the lithium battery.

If you use lithium battery in a low-temperature environment, that is, below 4 °C, you will also find that the battery life is reduced. Some mobile phones' original lithium batteries are not charged even in low-temperature environments. But don't worry too much. This is only a temporary situation. Unlike the use in high-temperature environment, once the temperature rises, the molecules in the battery are heated and immediately return to the previous power.

In order to maximize the performance of a lithium-ion battery, it is necessary to use it frequently so that the electrons in the lithium battery are always in a flowing state. If you do not use lithium batteries frequently, please remember to complete a charging cycle for the lithium battery every month, do a power calibration, that is, deep discharge and deep charge once.

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