What is the difference between a polymer lithium battery and a lithium battery?

Polymer lithium batteries generally refer to polymer lithium-ion batteries. According to the electrolyte materials used in lithium-ion batteries, lithium-ion batteries are divided into liquid lithium-ion batteries and polymer lithium-ion batteries or plastic lithium-ion batteries. Do you know the difference between a polymer lithium battery and a lithium battery? Let's see.

Difference between Polymer Lithium Battery and Lithium Battery

Compared to lithium-ion batteries, lithium-polymer batteries are characterized as follows:

1. There is no battery leakage problem. The battery does not contain liquid electrolytes and uses colloidal solids.

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

3. Batteries can be designed into a variety of shapes.

4. Batteries can bend and deform: polymer batteries can bend up to about 900.

5. A battery that can be made into a single high voltage: liquid electrolyte can only be connected in series with several batteries to obtain a 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. T The capacity will be twice as high as the same size lithium-ion battery.

Life of Polymer Lithium Battery

Correct: Lithium lifetime is related to the number of times the charging cycle is completed, and there is no direct relationship with the number of charges.

A simple understanding, for example, is that a lithium battery uses only half the electricity on the first day and then fills it with electricity. If the next day is the same, that is, half of the charge, a total of two charges down, this can only count as one charging cycle, not two. Therefore, it may usually take several charges to complete a cycle. Every time you complete a charging cycle, the electricity decreases a little. However, the reduction is very small. High-quality batteries will still retain 80 % of the original power after multiple cycles. Many lithium power supply products are still used as usual after two or three years. This is why. Of course, lithium power life eventually needs to be replaced.

Lithium has a lifetime of 300 to 500 charging cycles. Assuming that the amount of electricity provided by a complete discharge is Q, if the reduction in the amount of electricity after each charging cycle is not considered, lithium electricity can be provided or supplemented with 300Q-500Q power during its lifetime. From this we know that if you charge 1/2 at a time, you can charge 600-1000 times; If you charge 1/3 at a time, you can charge 900 to 1,500 times. By analogy, if the charge is random, the number of times is uncertain. In short, no matter how charged, the total amount of electricity added to 300Q ~ 500Q is constant. Therefore, we can also understand that the lithium battery life is related to the total charge of the battery, regardless of the number of charges. The effects of deep charge and shallow charge on the electrical life of lithium are not significant.

In fact, shallow charge is more beneficial to lithium electricity, only when the power supply module of the product is done for lithium electricity, there is a need for deep charge. Therefore, the use of lithium power supply products do not have to stick to the process, everything to facilitate first, charging at any time, do not worry about affecting life.

If lithium is used in an environment higher than the specified operating temperature, that is, 35 °C, the battery's power 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 this temperature, the damage to the battery will be even greater. Even if the battery is stored in a hotter environment, it will inevitably cause corresponding damage to the quality of the battery. Therefore, it is a good way to prolong the lithium electric life to keep the operating temperature at the optimum.

If lithium is used in a low-temperature environment, that is, below 4 °C, it will also be found that the battery's service time is reduced. Some mobile phones 'original lithium power is not even charged in a low-temperature environment. But don't worry too much, it's just a temporary situation. Unlike the use in high-temperature environments, once the temperature rises and the molecules in the battery are heated, they immediately return to their previous electricity.

To maximize the performance of lithium-ion batteries, it is necessary to use it often so that the electrons in the lithium battery are always in a state of flow. If you do not often use lithium electricity, please remember to give lithium electricity to complete a charging cycle every month, do a charge calibration, that is, deep charge once.

The page contains the contents of the machine translation.