Are all current mobile phones using lithium batteries?

Are all current mobile phones using lithium batteries?

Lithium batteries are divided into lithium metal batteries, lithium ion batteries, and lithium polymer batteries, but lithium batteries is regarded as lithium batteries; nowadays, almost are lithium batteries on the market. The nickel battery has been eliminated, because it has a memory function, and highly pollute the environment. Lithium-ion batteries not memory function, which is the biggest benefit compare to nickel-metal hydride batteries. It also small size and high capacity. Therefore, now is Lithium batteries and the nickel series battery has been eliminated.

1. The mobile phone battery consists of three parts: the battery core, the protection circuit and the outer casing. The current mobile phone battery is always a lithium-ion battery (often referred to as a lithium battery in the case of non-standard), and the positive electrode material is lithium cobaltate. The standard discharge voltage is 3.7V, the charge cut-off voltage is 4.2V, and the discharge cut-off voltage is 2.75V. The unit of electricity is Wh (Wh), because the standard discharge voltage of the mobile phone battery is unified to 3.7V, so mAh (mAh) can also be used instead. The conversion relationship between these two types of units on the mobile phone battery is: watt hour = An hour × 3.7.

2. Overcharge, overdischarge and short circuit can seriously damage the performance of the battery and may lead to the risk of use. To this end, mobile phone batteries generally have a slender protective circuit board to prevent these risks.

3, the charger is divided into straight punch and seat punch. Directly converts 220 AC mains into 5V DC, enters the mobile phone and is depressurized by the charging circuit of the mobile phone to the battery. Generally, when the mobile phone is purchased, there will be delivery. The charger is connected directly to the battery to convert the mains to the required voltage for use in the battery.

4. If you want to use the charger, please choose the original or excellent quality products. If the charging circuit in the charger is of poor quality, there is a risk of charging.

5. Lithium-ion batteries have no memory effect, but they are inert. If they are not used for a long time, there may be passivation. After several times of flushing, the best performance can be restored.

6. Before charging, the lithium battery does not need to be discharged. Some quick chargers only indicate that they are full 90% when the indicator light changes. The charger will automatically change to charge the battery with slow charging. However, in general, if the display is full, you can remove it.

7, in order not to damage the battery life, it is best to charge slowly when charging; time does not have to be too long.

8. The mobile phone battery has self-discharge, because over-discharge will damage the battery. If the mobile phone battery is not used for a long time, it should be guaranteed that the battery has a certain amount of power.

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9. Although our mobile phone is within the network coverage area, our mobile phone has been unable to accept and make calls when the phone is turned off and charged. At this point, we can use the mobile phone's untransfer function to transfer the phone to the fixed phone nearby to prevent the loss of incoming calls. This method is also applicable when the phone is not in the network coverage area or the signal is weak and temporarily unavailable.

10, do not expose the battery to high temperature or cold, like a three-day, should not put the phone in the car, withstand the sun exposure; or get it in the air-conditioned room, put it in a place where the air is blown straight. When charging, it is normal for the battery to have a little heat, but it cannot be banned from high temperatures. To avoid this, it's best to charge at room temperature and don't cover anything on your phone.

11. When charging, the longer the time, the better. If the inferior battery without protection circuit is full, stop charging. If the battery is not used for a long time, the battery and the mobile phone should be separated.

12, the new purchase of batteries does not need to charge for 12 hours, but it is best to carry out 3 to 5 hours of full charge and discharge process, full charge is normal charge to 100%, full release is the phone to use low battery reminder. Because the battery is subjected to electrolyte filling, chemical formation, charge and discharge, and volumetric process before leaving the factory, the battery is activated, but it takes less than one month after delivery to reach the user's hands. The effect of the discharge, the battery material is passivated, and then the battery can be activated by full charge and discharge. [1]

In the use of lithium batteries, it should be noted that after the battery is placed for a period, it enters a sleep state. At this time, the capacity is lower than the normal value, and the use time is also shortened. However, the lithium battery is easy to activate, if the battery is activated after 3 to 5 normal charge and discharge cycles, and the normal capacity is restored. Due to the characteristics of the lithium battery itself, it is determined that it has almost no memory effect. Therefore, the new lithium battery in the user's mobile phone does not require special methods and equipment during the activation process. Not only in theory, but from my own practice, it is best to use a standard method of charging this "natural activation" method from the beginning.

Charging time

The mobile phone battery is equipped with a protective plate. This protective plate will automatically power off when it is available.

A. Overcharge protection. That is, when the battery is full, it will automatically stop charging.

B. Over-discharge protection. That is, the battery will automatically stop discharging when it uses 3.2V.

C. Short circuit protection. That is, the battery will be disconnected automatically if it is accidentally shorted.

That is to say, the general battery is fully charged after charging for 2-3 hours. After the full battery has disconnected the charging circuit. So, it does not make sense.

First charge

Mobile phone battery charging for the first time

Mobile phone battery charging for the first time

1, 12-14 hours of origin: the first generation of nickel-cadmium batteries, is the need for small rate charging, generally recommended charging current 1/10C, such as your battery capacity is 600mAh, then 1C is 600mA, 1/10C is 60mA. Therefore, it takes more than 10 hours to fully charge. For nickel-cadmium batteries, small-rate charging is beneficial.

2. The battery condition of the mobile phone in 2013: All the mobile phones use lithium-ion batteries. The most recent impression from us should be the 3210 released in 1999. The nickel-hydrogen battery is equipped with a mobile phone with nickel-hydrogen battery. It is.

3, lithium-ion battery knowledge: We only say capacity on the one hand. There are two detection methods for measuring the capacity of a lithium-ion battery: 1C charge, 0.2C charge; 0.2C charge, 0.2C release, regardless of the charging system used, should meet the standard. Because lithium-ion batteries are different from previous nickel-cadmium batteries, 1C's high-rate charging has been accepted, and it must be accepted. And if a 600mAh battery is charged at 1C, it should be fully charged in about 1 hour. If the mobile phone direct charge is designed like this (many are 0.5C-0.8C), 12-14 hours is nonsense.

According to the GB/T182872000 national standard, when the constant current is charged to 4.2V, the constant voltage is turned on, and when the current drops to 0.01C, the charging is terminated. For example, the charger charging current is 0.5C, and the battery is charged at 600mAh. The charging current will drop to 6mAh in about 2 hours. Currently, it is full. Why is it down to 0.01C? Because it is already full, this reflects the battery. For nickel-metal hydride, national standards have also specified high-rate charge and discharge indicators.

4. What counts as "activation"? Lithium-ion battery itself is "live". If the design capacity is 600mAh, although I am fully charged after 2 hours of charging, then I can discharge it and get a capacity of 600mAh. The designed capacity can be achieved. Is there any problem with this?? The technical supervision department implements the national standard, the detection capacity is charged with 1C, and then put, one of the five times is qualified. Therefore, normal use, normal charging can be used from the new battery, do not worry about "exciting".

5. Charge 14 hours is: mobile phone batteries are mostly lithium-ion batteries in 2012 and with mobile phone direct charge, 2 hours of charge are almost full, this is the result of constant current charging; the rest of time is constant voltage charging, that is, trickle charging makes battery capacity of mobile phone fuller and standby time longer.

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