Reasonable charging method of lithium battery

Lithium ion battery, usually we call it lithium battery for short. In daily life, lithium battery is closely related to our use of mobile phones and laptops. At present, the use of lithium battery has been very extensive, but people may not be so familiar with the use of lithium battery. How long does the lithium ion battery need to charge for the first time? What is the correct charging and discharging method of lithium ion battery? What are the matters needing attention in the use of lithium battery? So with that in mind let's move on.

Lithium battery is divided into lithium battery and lithium ion battery. Currently, mobile phones and laptops are powered by lithium-ion batteries, commonly known as lithium batteries. Currently, lithium ion batteries are used in mobile phones and so on, while the real lithium battery is not used in daily electronic products due to its high risk.

Lithium ion battery has high energy density and high average output voltage. Self-discharge is small, less than 10% per month. There is no memory effect. Wide working temperature range for - 20 ℃ ~ 60 ℃. Excellent cycle performance, fast charging and discharging, charging efficiency up to 100%, and large output power. Long service life. Without environmental pollution, it is called green battery.

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

For laptop battery, mobile phone battery, camera, MP3MP4PSP lithium battery:

1.Whether it is a new battery or not, you can pull it out and use it when it is full. Generally, it will be full after 2-4 hours of charging. Don't charge it for more than 8 hours to 12 hours.

2. When the phone power is too low when the prompt, should try to start charging in time

3. Lithium battery activation does not require a special method, the battery has been activated before the factory. If you insist on using the popular "first three 12-hour long charging and activating" method, it won't actually work.

Reasonable charging method of lithium battery:

⑴ Standard charging method: 0.2c5 constant current charging to the battery terminal voltage is 4.20v, changed to constant voltage charging, charging current <0.01C5 is regarded as full.

⑵ Quick charging method: take 1C5 constant current charging to the battery terminal voltage of 4.20v, change to constant current charging to charging current <0.01C5.

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

② When the battery terminal voltage reaches 4.20v, it must be immediately transferred to the constant voltage, which requires a high voltage (error <0.5%) and must be measured with more than four and a half multimeters.

Lithium battery discharge method:

⑴ Standard discharge method: the constant current from 0.2c5 to the battery terminal voltage is 2.75v.

This method is mainly used for the calibration of battery capacity.

⑵ Rapid discharge method: the internal resistance of lithium ion battery is very small, so large current discharge is allowed. At room temperature, discharge at 1C5 current can discharge for more than 54 minutes (more than 90%). 1.5C5 discharge time more than 30 minutes; 2C5 discharge time more than 23 minutes; And allow a short time more current discharge.

Note of lithium battery in the use of mobile devices

Lithium battery cell phone in the use of charging and discharging problems in the most important tip:

1. Charge in accordance with standard time and procedure, even the first three times. Firstly, plug the charger (wire charging) into the power supply, and then plug the output end of the charger into the charging port of the mobile phone.

2, when the phone power is too low, should try to start charging; Lithium batteries are most vulnerable to over discharge!

3, lithium battery activation does not need special methods, in the normal use of mobile phone lithium battery will be activated naturally.

Should the first three lithium batteries be charged for 12 hours? Should the lithium battery be activated?

For the lithium battery "activation" problem, many people say: charging time must be more than 12 hours, repeated three times, in order to activate the battery. This "first three charges over 12 hours," is apparently from the nickel battery (such as nickel-cadmium and nickel-metal hydride) continuation of the argument. So this statement, it can be said, is misrepresented at the beginning. The charge and discharge characteristics of lithium battery and nickel battery are very different, and it can be very clear to tell you that all the serious formal technical data I have looked up emphasize that the charge and discharge will cause great harm to lithium battery, especially liquid lithium ion battery. Therefore, it is best to charge according to the standard time and standard method, especially do not exceed 12 hours of ultra-long charging. Generally, the charging method described in the mobile phone manual is the standard charging method suitable for the mobile phone.

In addition, lithium-ion cell phones or chargers automatically stop charging when the battery is full, and there is no so-called "trickle" of nickel chargers that lasts more than 10 hours. That is, if your lithium battery is fully charged, it will also be white on the charger. And none of us can guarantee that the characteristics of the battery charge-discharge protection circuit will never change and the quality is foolproof, so your battery will be in danger of wandering around for a long time. This is another reason why we oppose long charging.

In addition, on some mobile phones, if the charger is not removed after charging for a certain period of time, the system will not only not stop charging, but also start the discharging - charging cycle. While this may have its purpose, it is clearly detrimental to battery and phone/charger life. At the same time, long charging takes a long time and often needs to be done at night. In the case of China's power grid, nighttime voltage in many places is relatively high and fluctuates greatly. Having said that lithium batteries are delicate, they are much less resistant to fluctuations in charge and discharge than nickel batteries, which pose additional risks.

In addition, another aspect that cannot be ignored is that lithium battery is also not suitable for over discharge, over discharge of lithium battery is also very adverse.