How to charge the mobile phone to protect the battery?

Ⅰ. Working principle of lithium ion battery

At present, the batteries used by most mobile phones on the market are the achievements of the Nobel Prize-lithium-ion batteries. Compared with traditional batteries such as nickel metal hydride, zinc manganese, and lead storage, lithium-ion batteries have the advantages of large capacity, small size, high voltage platform, and long cycle life. It is precisely because of these advantages that mobile phones can achieve smaller shapes and longer battery life.

LiCoO2 (lithium cobaltate), NCM, and NCA materials are usually used for the positive electrode of lithium-ion batteries in mobile phones. The negative electrode materials in mobile phones mainly include artificial graphite, natural graphite, MCMB, SiO, etc. During the charging process, lithium is deintercalated from the positive electrode in the form of lithium ions, and finally intercalated into the negative electrode through electrolyte movement, while the discharge process is just the opposite. Therefore, the process of charging and discharging is the continuous intercalation of lithium ions between the positive and negative electrodes, so it is vividly called "rocking chair battery".

Ⅱ. What are the stages of mobile phone charging?

Let's look at the overall process of charging a mobile phone first. The charging head converts 220V AC power into low-voltage DC power, which is input into the mobile phone and then lowered by the charging circuit of the mobile phone to be used by the battery. In this process, it actually contains many different stages. What we are currently very common is three-stage charging: trickle charging, constant current charging and constant voltage charging.

1. Trickle charging: When the battery voltage is low, the battery cannot be charged with a large current due to excessive discharge. So we have to precharge it with a small current until the battery can accept a large current.

2. Constant current charging: Ir is the stage of full speed charging. At this time, the battery will be charged with the rated high current of the battery, and the electric energy will quickly enter the battery. During this process, the battery will reach the maximum power supported by the phone. After the end of the second stage, the battery capacity of the mobile phone generally reaches 70%~80%. Due to the increase of voltage, this stage is also a stage where heat generation is more obvious.

3. Constant voltage charging: The charging voltage at this stage will be constant. This is because the battery is not allowed to exceed its cut-off voltage, otherwise the battery is vulnerable to damage, causing potential safety hazards. So after the battery reaches this value, the mobile phone will control the charging current. The current decreases until the phone thinks the battery is fully charged.

Ⅲ. Why does the phone remind when the battery level reaches 20%?

It is impossible to change the gradual deterioration of the battery, but we can delay the deterioration of the battery through some methods. The 20% power reminder is similar to a self-protection mechanism of the battery. If the power is lower than 20% and continues to use, the activity of the battery will be reduced, and the service lifespan of the battery will also be affected in the long run. Continuing to use the battery when the power is lower than 5% may cause the battery to be over-discharged and the voltage inside the battery to be too low, which will cause the phone to fail to turn on and charge.

Ⅳ. Why does the mobile phone consume power so fast?

1. Do not turn on Bluetooth, GPS, etc. when not in use

Remember to turn off applications such as Bluetooth and "map" positioning after use, otherwise the battery will drop slowly.

2. Various software in the background secretly "eat power"

A lot of software is installed in your mobile phone without your knowledge, and consumes your power, memory and even traffic for a long time, such as some mobile phone management software, Trojan horses or virus programs. These programs are the big consumers of your mobile phone's electricity.

3. Do not exit the mobile APP after use

Because of the demand for intelligence, many software in the mobile phone will be resident in the memory. For example, commonly used input methods, alarm clocks, security software, etc. Our commonly used mobile phone QQ, WeChat, etc. must be closed before exiting the memory, otherwise it will definitely consume power if it is always running.

Ⅴ. How to charge the phone correctly?

1. The charging environment should be suitable

Lithium-ion batteries also have high temperature requirements, and their normal operating (discharging) temperature range is between 0°C and 35°C. Under low temperature conditions, the ionic conductivity of the electrolyte decreases, the charge transfer resistance increases, and the performance of lithium-ion batteries will deteriorate. The intuitive feeling is the decrease in capacity. But this capacity decay is reversible, and the performance of lithium-ion batteries will return to normal after the temperature returns to room temperature.

However, if the battery is charged at a lower temperature, because the polarization of the negative electrode will make its potential reach the reduction potential of metal lithium, resulting in the deposition of lithium metal on the surface of the negative electrode. On the one hand, this will reduce the capacity of the battery, and on the other hand, lithium dendrites may be generated, causing a short circuit in the battery, which will pose a safety hazard.

Charging lithium-ion batteries under high temperature conditions will also change the structure of lithium-ion positive and negative electrodes, resulting in irreversible attenuation of battery capacity. Therefore, we try to avoid charging the mobile phone under too cold or too hot conditions, which can also effectively prolong its service lifespan.

2. Do not charge while playing with your mobile phone

Playing with your phone while charging will make our battery less and less durable. The battery of our mobile phone will get hot during use, and the battery will also get hot when charging. When we play with our mobile phone while charging, it will cause the battery to become hotter. High temperature will cause damage to the internal components of the mobile phone. Moreover, while the battery is outputting while inputting, it will also cause a serious burden, and there may even be a case of battery swelling. Therefore, it is best not to play with the mobile phone when our mobile phone is charging.

3. Remove the mobile phone case when charging the mobile phone

The current mobile phone casing is very thick, which is not conducive to the heat dissipation of the mobile phone. Please be sure to remove your phone case so that the phone has a good cooling effect. If you want to charge faster, there is a very simple and effective way, that is, during the charging process, we can turn off the mobile phone or put the mobile phone into flight mode, so that the charging speed will be more than doubled .

4. Connect the charger correctly

First of all, we need to connect the charger of the mobile phone, and then plug the charger into the power supply. Doing so can prevent the current from impacting the mobile phone and causing damage to the battery.

5. Do not charge for a long time

We are used to charging our mobile phones when we go to bed at night, and we charge them all night. In addition to affecting sleep, this practice will also affect battery lifespan. If the mobile phone is still connected to the Internet and has functions such as message push enabled during the charging process, a new round of power consumption will start after a full power failure, then the mobile phone battery may enter frequent charge and discharge cycles. Although current smartphones use lithium-ion batteries, they will automatically power off when the battery is fully charged. But it is not the best practice to fully charge the mobile phone, so we don't need to charge the mobile phone overnight.

6. Choose a regular charging cable and charger

When we charge the mobile phone, it is best to use the original charger. Because although some charging cables have the same interface and can charge our mobile phones, the current inside them may be different. If we use such a charger for a long time to charge our mobile phone, it will damage our battery. For this reason, when charging your mobile phone, please remember not to use inferior or non-original chargers to charge your mobile phone. If we need to buy a charger, we must choose a well-known brand, so as to ensure the quality!

When the mobile phone data cable or charger fails, it is recommended to purchase supporting equipment for the mobile phone, which will help prolong the service life of the battery. We also need to use products that have obtained CCC certification for the power strip that connects the charger to avoid potential safety hazards.

Ⅵ. What are the solutions for the hot phone when charging?

1. Check whether the battery is aging or damaged, if there is any problem, please replace the battery.

2. Check whether the heat dissipation of the mobile phone is sufficient, and clean the radiator and fan of the mobile phone.

3. Check whether the output voltage of the charger is too high or over-current, if there is any problem, please replace the charger.

4. Check if there is any problem with the mobile phone system or application, if there is a problem, please upgrade or reset the system.

Ⅶ. What precautions should be taken when charging the mobile phone?

1. Clean the charging port regularly: After using the phone for a long time, the charging port may accumulate dust or debris, which will affect the charging effect. We need to use a soft brush or cotton swab to clean the charging port regularly to ensure a good charging connection.

2. Avoid over-discharge: Similarly, over-discharge will also have a certain impact on battery lifespan. We try to avoid draining the battery to 0%, and it is recommended to charge the phone in time when the battery is below 20%.

3. Avoid overcharging: Although most modern mobile phones have an overcharging protection function, overcharging for a long time may still have a certain impact on battery life. Generally speaking, when the power of the mobile phone reaches 100%, it is a better choice to unplug the charger in time.

4. Use the original charger: In order to ensure the safety and effectiveness of charging, it is recommended to use the original charger or a charger that meets the specifications of the mobile phone. We want to avoid using inferior or unsuitable chargers, so as not to cause damage to the mobile phone.

5. Avoid overheating environment: When charging the mobile phone, we try to avoid exposing the mobile phone to high temperature environment, such as direct sunlight, next to the stove, etc. Excessive heat may adversely affect the proper functioning of the battery and phone.

Ⅷ. What are the ways to prolong the battery life of mobile phones?

1. We update the mobile phone to the latest system and maintain the most advanced energy-saving technology.

2. Turn off idle mobile phone functions, such as Bluetooth, wireless network, etc.

3. When charging, we need to remove the protective case of the mobile phone to prevent the mobile phone from overheating.

4. Keep away from extreme temperatures. The best temperature for mobile phone operation is 0°C to 35°C, avoid low and high temperatures.

5. When not in use for a long time, the phone should keep half of its power. Both fully charged and completely empty storage will cause battery aging.

Ⅸ. Reasons for the slow charging of mobile phones

1. Cleaning of the charging port

If the mobile phone is not cleaned for a long time, the charging port may be blocked by dust, resulting in poor contact. This will not only slow down the charging speed, but in severe cases, the phone may not be able to charge. Therefore, we must develop a good habit of cleaning the dust of the mobile phone regularly.

2. The temperature when the mobile phone is charging

In a low temperature environment, the low temperature protection mechanism of the lithium battery will weaken the chemical reaction of the substances in the battery, resulting in failure to charge or slowing down the charging speed. Lithium-ion batteries work well when the temperature is right. But it should be noted that an overheated environment is easy to cause damage to the lithium battery. We should also try to avoid charging in an overheated environment and not playing with the phone while charging.

3. Charging head and data cable

When charging a mobile phone, the charging head determines the voltage and current. Regular chargers are marked with voltage and current output parameters. If your mobile phone supports 9V/2A, which is 18W charging, then use a 5V/1A charging head with an output power of 5W to charge the mobile phone, and the charging speed will be much slower.

When wired charging, the charging head cannot be directly connected to the mobile phone, and the data cable comes in handy at this time. The data line is mainly responsible for current transmission during charging, so it will inevitably affect the charging speed. The quality and length of the data line determine the level of loss during the current transmission process. The shorter the data line, the less wire loss and the faster the charging speed.

4. Mobile phone charging protocol

Obviously the mobile phone supports fast charging, and a charger that supports fast charging is also used, but the result is no different from slow charging? This may be the reason for mixed chargers and incompatible charging protocols. Many mobile phone manufacturers now support fast charging, but different manufacturers have different fast charging protocols, such as Huawei's FCP protocol, Qualcomm's QC protocol, and MediaTek's PE protocol. If we mix mobile phone charging protocols, we may not be able to achieve the effect of fast charging. Therefore, we'd better choose the official charging plug and charging cable.

Ⅹ. Causes and precursors of mobile phone explosions

1. Reasons

(1) The battery temperature is too high.

Be careful when the battery temperature is too high, especially in summer. Don’t put the mobile phone in a place with high temperature.

(2) The battery is short-circuited.

When the mobile phone is in a high temperature state or subjected to impact, metal friction, etc., it may cause a short circuit of the battery and an explosion.

(3) The batteries have been overcharged for a long time.

In the charging state for a long time, overcharging and overcurrent will also lead to high temperature and high pressure, causing potential safety hazards. Lithium-ion batteries may be suddenly discharged under special temperature, humidity and poor contact conditions to generate a large amount of current.

2. Precursors

(1) The battery is seriously aging.

Severe battery aging is generally rare, but there are signs, such as swelling on the surface or liquid flowing out, etc. Pay attention to the soft charging line of the mobile phone.

(2) The mobile phone cannot be charged.

The cause of mobile phone explosion is mostly the battery problem. When the mobile phone cannot be charged, after excluding the cause of the charger, the battery is basically broken.

(3) The mobile phone is too hot.

The temperature rise of the mobile phone caused by using the mobile phone for a long time is generally a normal phenomenon. But if the mobile phone is too hot, we have to stop using the mobile phone.

(4) Frequent automatic restarts.

Frequent restarts will keep the mobile phone running at high speed for a long time, and when the mobile phone heats up to a certain level, it will cause an explosion.