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Experiences in polymer battery maintenance Experiences in polymer battery maintenance

by:dcfpower     2021-03-23

Using polymer batteries, let’s talk about some experiences. If there is something wrong, please point it out. In the use of polymer batteries, we mainly focus on several issues:

Maintenance experience 1. What is the charging cycle (or called the charge and discharge cycle)?

Many people think that the life of a polymer battery is the number of charging cycles, but it is actually wrong. Strictly speaking, it should be called a charging cycle. A complete charging cycle is to charge 100% of electricity, and then discharge 100% of electricity. The life of a lithium battery is about 300-500 complete charging cycles. The correct statement about the life of a lithium battery should be 300-500 full charge and discharge.

In other words, suppose a battery is 100% full: 50% is used and 30% is charged. This is not a complete cycle. A complete cycle is two 100% charging and discharging. This is actually 40% cycle, when you have used 60% to recharge

40%, then there will be a 90% cycle. And so on...

Lithium batteries have no memory effect, so I agree with Apple’s claim that the use of lithium batteries should be, use some, charge some, not charge It takes too long, and it doesn't need to be polished. To charge the battery, it is best to use a small current to charge, generally 0.5C-2C charging, small current is less irritating, and can better maintain the battery. 3. Avoid overcharging and overdischarging. Generally, the charge cut-off voltage is set to: 4.25V, and the discharge cut-off voltage is about 3.0V. The discharge cut-off voltage should be determined according to the actual situation. For example, when playing violence 3D, the discharge cut-off The voltage is best set at about 3.4V, below this value, it is easy to cause the entire battery pack to be over-discharged due to instantaneous over-discharge. Avoid full battery storage. When not in use for a long time, the lithium battery should be taken out and placed in a cool and dry place. Don't freeze it to avoid water vapor erosion. Avoid using it in a high-temperature car. For long-term storage, charge the battery to 40% and store it, or store the voltage between 3.75 and 3.85V.

Second maintenance experience, do you need to turn on USB charging

Now more and more devices support USB charging. I personally feel that it’s okay to turn it on. Still the reason above. But with USB charging, I saw a friend post saying that it was not full because of insufficient voltage (PDA has never encountered it, it can be fully charged, I don't know why 580 can't), I also encountered the same situation. From a habit, I still don’t want to charge the battery every time I plug in the USB. It’s mainly a matter of habit, so I turn off the USB charging myself. If you don’t have a power supply, you can turn it on again to charge it, which is convenient anyway. At the same time, I don’t know if charging the mobile phone under non-standard voltage will affect the mobile phone and the battery. Without knowing the exact situation, individuals tend to turn off the USB charging as much as possible.

Maintenance experience three, what should I do if the lithium battery is not used

The self-discharge rate of the lithium polymer battery is still a bit high. To be on the safe side, if you don’t use it, it’s best Fill it up first, and then store it in a sealed plastic bag. Take it out and use it once every 1-2 months, that is, charge and discharge it once to keep the lithium ion active. Do not exceed 3 months at the longest, and be sure to take it out and charge it once. If it is stored for too long and not used, the lithium ion activity will decrease, which will affect the battery life.

Fourth maintenance experience, how to charge better?

The last piece of advice, the original lithium battery is best not to use a brand-name charger to charge, just use the equipment + original charger, or buy an original charger. Because miscellaneous-brand chargers often do not use standard voltage and current, they are harmful to the original battery. Especially the old-fashioned charger with discharge function, don't use it, if you accidentally over-discharge, the battery will be exhausted.

Maintenance tips 5. The environment where the lithium battery is used

Using a lithium battery pack in an environment that is too hot or too cold will also affect the life of the lithium battery. So on a hot day, don’t leave your phone in the car or expose it to the sun; if it’s more than minus 20 degrees in winter, don’t take your phone outside to burn it (exposed for a long time), or put it in a warm pocket. Here, use earphones (don’t use Bluetooth earphones either, they also have lithium batteries).

Polymer lithium ion battery: the temperature range is 0~+45℃ when charging; the temperature range is -20~+60℃ when discharging; the long-term storage environment of the battery is: temperature -20~+35℃. Shenzhen Grid Battery Co., Ltd. can develop customized batteries under various conditions such as the use environment and method of the battery.

Related readings on polymer battery maintenance:

Polymer battery maintenance guide

What is Polymer battery

Polymer battery advantage

Polymer battery temperature environment

Polymer lithium battery advantage

Shenzhen polymer lithium battery

High-rate polymer lithium battery

Shenzhen lithium ion polymer

The difference between polymer lithium battery and lithium battery

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