Some introductions about charging and discharging of lithium-ion battery

In our daily life, our use of lithium-ion batteries is very frequent. Lithium batteries are closely related to our use of mobile phones and laptops. However, many of us don't know much about the correct use of lithium-ion batteries. How long does the lithium-ion battery charge for the first time? What is the charging method and discharge method of lithium batteries? Let's take a look at it with Xiaobian!

　　 How long does it take for a lithium-ion battery to charge for the first time ?

For laptop battery, mobile phone battery, camera, MP3\MP4\PSP lithium battery:

1. Whether it is a new battery or not, it can be pulled out and used. Generally, it will be full for 2-4 hours, and it will not be charged for 8 hours to 12 hours.

2. When there is a low battery power prompt, you should start charging as soon as possible;

3. The activation of the lithium battery does not require a special method and is activated before the battery is shipped from the factory. If you insist on using the "first three 12-hour long charge activation" method that is circulated, it will not actually work.

　　 Lithium battery charging method

( 1 ) Standard charging method

Charging with a constant current of 0.2C5 until the battery terminal voltage is 4.20V, changing to constant voltage charging, until the charging current <0.01C5 is considered full.

The standard charging method is often used for calibration of battery capacity, because charging is too slow and rarely used in daily use.

( 2 ) Fast charging method

Charge with a constant current of 1C5 until the battery terminal voltage is 4.20V, and change to constant current charging to the charging current <0.01C5.

　 Note on the fast charging method:

1 The initial charging current should not be too large, so as to avoid overheating of the battery and leakage and bursting.

2 When the battery terminal voltage reaches 4.20V, it must be switched to constant voltage immediately. The voltage requirement is high (error <0.5%), and must be measured with more than four and a half multimeters.

　　 Lithium battery discharge method

( 1 ) Standard discharge method

The constant current was discharged at 0.2 C5 until the battery terminal voltage was 2.75V.

Because it is difficult to meet this condition in daily use, it is of little significance. This method is mainly used for calibration of battery capacity.

( 2 ) Fast discharge method

Because the internal resistance of the lithium ion battery is very small, it allows large current discharge. At room temperature, discharge at 1C5 current can discharge for more than 54 minutes (more than 90%); 1.5C5 discharge time is more than 30 minutes; 2C5 discharge time is more than 23 minutes; Allows for a shorter current discharge.

How long does the lithium-ion battery charge for the first time? Lithium battery charging method and discharge method, I believe that the above content, we should have a understanding of the correct use of lithium-ion batteries. Lithium-based batteries are divided into lithium batteries and lithium-ion batteries. At present, mobile phones and notebook computers use lithium-ion batteries, which are commonly referred to as lithium batteries. Currently, lithium-ion batteries used in mobile phones and the like, and true lithium batteries are not used in everyday electronic products because of their high risk.