On the charge of charging is not full and excessive battery damage

In the use of lithium batteries, it should be noted that after the battery is placed for a period of time, 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, as long as 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 user's new lithium battery 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.

For the "activation" problem of lithium batteries, many sayings are: charging time must be more than 12 hours, repeated three times in order to activate the battery. This statement that "the first three charges have to be charged for more than 12 hours" is obviously a continuation of the nickel battery (such as nickel cadmium and nickel hydride). So this kind of statement can be said to be misinformation at the beginning. The charge and discharge characteristics of lithium batteries and nickel batteries are very different, and it is very clear to tell you that charging and over discharging can cause huge damage to lithium batteries, especially liquid lithium ion batteries. Therefore, charging is preferably performed in accordance with standard time and standard methods, especially for ultra-long charging of more than 12 hours.

Hey, as a lead-acid battery worker, he often encounters problems with lithium batteries. Since there is no lithium-electric colleague to answer, then I will take it for granted. . Compared with lead storage, the biggest advantage of lithium battery performance is that it has a long cycle life. Even if it is fully charged and fully discharged, there is no pressure for thousands of times. However, the disadvantage is that it is sensitive to overcharge and over discharge. Once overcharged or over discharged, the battery will irreversibly damage. In order to cope with overcharge and discharge, all lithium batteries have a complicated and strict power management system (BMS, battery management system), which strictly controls the amount of power in and out of the battery, thus ensuring that the battery is always in a safe state. A good mobile phone, the power management system is very accurate, even if it is always plugged into the charger, it will not overcharge, even if it is overused, it will not be over-discharged. Therefore, if you just use it, you will not be fully charged when you go out. If you feel that you will not automatically shut down after going out, you will still have a portable power supply; if you charge 90% at night, you can continue charging. But for safety, I suggest you unplug it. If the lithium battery power management system is not good enough, then the overcharge and over discharge will directly cause the battery to be scrapped, but for the user, the effect of overcharge is greater, because over discharge, at most, the end of battery life, but Overcharged, the battery swells or explodes, which is a big problem. It is said that the power management of the Apple mobile phone is very cattle. After the battery is fully charged, it does not stop charging, but starts to discharge. After releasing about 5%, recharge it and cycle it. Not aware of it.

First of all, the battery's power management system won't let you overcharge.

Secondly, the battery itself is a consumable item. When you use it or not, the battery is aging and the performance is declining. But it is enough to use your next phone.

Use it with confidence and don't ask questions later.

All of the following contents are limited to the lithium-ion battery used in mobile phones. Other nickel-cadmium-nickel-metal hydride batteries are completely unsuitable due to different constructions. **The problem is mentioned in the mobile phone battery. It is assumed that the main problem is not the cottage machine made by the inexplicable manufacturer, because the cottage machine The particularity, we have no way to know the difference between the various cottages, and the design of the cottage machine is different and cut corners, not your imagination can be achieved. The battery we use now has a dedicated circuit board inside to ensure that the battery is over-discharged (discharging too much power to affect battery life) and overcharging (too much charge to affect battery life) Lifetime), it is very important that the overcharge is caused by the battery bulging. If the remaining amount of the phone case design is insufficient, the rear case will be lifted. At the same time, the current mainstream MTK platform products will have overcharge protection, but the specific design depends on each manufacturer, the general mainstream products will have overcharge protection, that is to say, you have no problem with plugging in the charger for a long time. We use batteries, the most concerned about the life of the battery, and the battery life depends on the number of times of charging, after a battery is charged for 400 times, the battery power will drop to about 80% of the nominal. Where is the nominal? It is a bunch of numbers in front of the MAH on the battery, such as 1400mAh. Then we discuss the charging situation below. We have simplified various charging situations into three types: 1. Battery power is used from 100% to 0%, and then recharged to 100% 2. Battery power is used from 100% to 50. %, recharge to 100% 3. Battery power from 50% to 0%, and then only charge to 50% in three cases, the battery power drops to the nominal 80% as the test standard, the second way, It can be charged the most, the second is the second, and the third is the worst. So the charge is full and the best. BTW, the above mentioned Apple's charging mechanism, in fact, Apple has been going to iPhone5s for iPhone4s. The charging mechanism has changed a lot. When iPhone4 and iPhone4s are used, you will feel that it will always be full after charging, because it is always discharging. Will charge, that is, the battery is constantly being charged, because I have not used the iPhone5, I do not know the situation, when I used the iPhone5s, I found that Apple's charging mechanism has completely changed, it will detect the number of times the charger is plugged in, or It is the voltage of the battery. If you don't pull the charger, after the iPhone5s is fully charged, it will stop charging until you unplug it. And when you plug in the charger, you use the phone, the power consumed is to go to the charger, not to take power from the battery, it can be said that the battery basically does not charge. Finally, Apple always walks in front of the industry. When the public manufacturers have just heard about Coulomb, it has appeared on the iPhone4 mobile phone and has been used by the masses, so now the mobile phone manufacturer and Apple the difference is about 2 years. In the mobile phone industry, the difference of 2 years is enough to crush the manufacturers, so Apple’s profit margin has been above 30%.

According to the question of the subject and some common questions about how to properly use the mobile phone battery, here is a brief explanation: [Question 1] How long does the mobile phone charge for the first time? (We often hear the relevant personnel say this when buying a mobile phone: "Because your mobile phone battery has not been activated, plus the battery has a memory function, so the first charge is very important, you must use the power in the phone, full of more than 12 hours. And the first three charges must also According to this method. The battery can be completely activated. If you don't do this, your mobile phone battery will not be used for a long time.") A: First of all, let’s explain what the memory effect of the battery is: if the battery is not completely charged for a long time, discharge, easy to leave traces in the battery, reduce the battery capacity, this phenomenon is called the battery memory effect. This means that the battery seems to memorize the user's daily charging and discharging amplitudes and modes. It is difficult to change this mode for a long time, and it is impossible to charge or discharge a large amount. Why the staff would recommend charging for the first time for 12 hours, and to discharge the battery power, in order to operate the battery in the widest voltage range, make full use of the battery capacity, and let the battery remember. So is the battery of any material having a memory effect? The answer is negative. Nickel-cadmium battery, nickel-metal hydride rechargeable battery, has a memory effect. Among them, the nickel-cadmium battery has the most significant memory effect. Early mobile phone batteries used nickel-cadmium batteries, so it was said that the first charge was 12 hours and the power was to be discharged. But now the battery in the mobile phone is a lithium battery, and the lithium battery has no memory effect, so the previous charging method is no longer applicable. The biggest advantage of lithium battery performance is that the cycle life is long, even if it is fully charged and fully discharged, there is no pressure for thousands of times. However, the disadvantage is that it is sensitive to overcharge and over discharge. Once overcharged or over discharged, the battery will irreversibly damage. In short, for batteries in today's mobile phones, overcharging is the biggest cause of damage to their service life. According to the above introduction, answer “How long does the mobile phone need to charge for the first time?” This question: It is recommended that you turn off the display according to the normal charger charging light, because it means that the charging has been completed, and overcharging will cause damage to the battery. [Question 2] Which is more harmful to the battery than charging and charging? A: First of all, I want to say that the charging is not full and will not cause damage to the battery! As mentioned above, once the lithium battery is overcharged or over discharged, irreversible damage will occur, which will damage the foundation of the battery. In order to cope with overcharge and discharge, all lithium batteries have a complicated and strict power management system (BMS, battery management system), which strictly controls the amount of power in and out of the battery, thus ensuring that the battery is always in a safe state. The battery management methods of major mobile phone manufacturers are different, but it is certain that even if you plug the charger all the way to the power supply, the mobile phone will switch its switch to stop charging the battery after it is fully charged. Power management, after fully charged, does not stop charging, but starts to discharge, release about 5%, recharge, and so on.) So if the mobile phone manufacturer's BMS is doing well, you don't have to worry about overcharging. Nowadays, after a large number of battery charge and discharge experiments, it is found that when the battery works between 30% and 70% of the power, the charge and discharge coulombic efficiency of the battery is the highest, and the damage to the battery is minimal. Therefore, if the charge is not full, it will not cause damage to the battery, but will prolong the service life of the battery. Now everyone's mobile phone is basically used lithium battery, it is recommended to charge the charger to charge the lamp to extinguish the display or the power can reach more than 90%, the discharge should not be put into the phone automatically shut down, when the phone is low When the electric warning is issued, it should be charged in time. This is the maximum protection for the battery and effectively prolongs the battery life.

If it is a lithium-ion battery, and you are not sure if there is overcharge protection, please do not overcharge. The current mainstream lithium-ion battery is a positive cathode combination of LiCoO2+LiC6 (in fact, lithium-absorbing graphite...). At the time of discharge, LiCoO2 is intercalated by Li+, and trivalent Co is reduced to divalent. When charging, this process is reversed. In the case of overcharging, it is actually forced to drive Li out of LiCoO2 and oxidize trivalent Co to tetravalent. The electronic structure of tetravalent Co is very unstable, and it is easy to decompose and cause damage to the overall crystal structure, thereby reducing the overall capacitance and cycle. If it is not full, it will not cause any harm to the structure of the lithium-ion battery. It is not a serious problem.

Answer the question directly. First, the mobile phone battery is unplugged and used. It will not affect the battery life. However, if the conditions permit and are not too troublesome, the use of the charging cable will be more conducive to battery life. In addition, although the current smart phones have many measures to prevent overcharging, IC protection is set up, but the probability of overcharging still exists, and it is likely to cause serious consequences, such as explosions, especially those cottages. Therefore, when using it daily, try not to overcharge it. When it is finished, it will be pulled out in time. This will not only prolong the service life of the battery, but also reduce personal injury. The last thing to say is that over-discharge is more harmful to the battery. Try not to use the mobile phone below 20% of the power. In particular, do not use the mobile phone below 5% of the battery, which will cause irreversible damage to the battery.

Generally, we all have an idea that it is basically correct that the battery power of the mobile phone should be completely discharged and recharged, because most of the rechargeable batteries we used in the past are nickel-hydrogen (NiH) batteries, and nickel-hydrogen batteries have so-called If the memory effect is not recharged, the battery life will be reduced rapidly. Therefore, we will use the last drop of electricity to start charging. However, most of the current mobile phones and general IA products use lithium (Li) batteries, while lithium batteries have no memory effect. If you wait until all the electricity is used up and then recharge it, the chemical inside the lithium battery will not react and the life will be reduced. The best way to do this is to charge it all the time to keep it in the best condition, so your battery can be used for a long time. This is the message from the manufacturer and is tested by itself.

Do not answer the phone while the phone is charging,

The reason is that when the mobile phone is charging, it is potentially dangerous to answer the call. India has a 31-year-old young business manager in an insurance company. He answered the phone a few days ago when the phone was still connected to the charger. After a few seconds of passing a large amount of current through the phone, the young man was thrown to the ground, family when found, the fingers burned, the heartbeat was weak, and the consciousness was lost. After being rushed to the hospital, the doctor announced that he had died in the hospital. Mobile phones are the modern inventions that are most commonly used today. However, we must also be alert to the danger of death from the instrument.

Do not use when the phone has one space left

Compared with when there is only one cell, the emission intensity is more than 1000 times. So people who talk about mobile phones should pay attention to it. I got a message from a mobile phone dealer yesterday. The very important message is that when you find that there is only one space left in the receiving strength of the mobile phone, it is better to hang up or switch to a public phone. Please stop talking. Why? Everyone knows that electromagnetic waves from mobile phones have always been a cause for concern. However, mobile phones are designed to enhance the intensity of electromagnetic waves emitted by mobile phones in order to maintain a good quality of calls in areas with poor reception. When the received content is more than one space, the emission intensity is more than 1000 times. The electromagnetic wave intensity is as high as 0.6W (watt). How strong is 0.6W? I can't describe exactly what it does to your brain.

Don't hurry and get together for exactly 1 minute.

When we call, we often rejoice in order to finish just before 1:00, but it is not like this. According to a China Mobile staff, it is already a time when you call 0:55. Minutes, so the call time from 0:55 to 1:00 is actually 2 minutes of money.

When the mobile phone enters the water, please remember not to make any button action, especially the shutdown (the water will follow the circuit board immediately after pressing any action). The correct method is to open the cover immediately, directly take the battery off and directly force the break. Electricity can keep the motherboard from being attacked by water.

This common sense is very important, so I will tell you that you can use your mobile phone for a long time. Learn a lesson, in the future, in case you need it.

How to make the phone battery come back to life

When your mobile phone battery life is getting shorter (memory effect or aging), will you buy another battery to replace it?

The next time you encounter this situation, please save your money and tell you a very effective way to try it out:

1) Wrap the battery in a newspaper and put it in a plastic bag and wrap it in a freezer for three days (the newspaper can absorb excess water)

2) After three days, take off at room temperature for two days.

3) Charge the battery after two days, and then fill it with a mobile phone wrap test (estimated to save 80%-90%)

This message was revealed by a well-known battery manufacturer engineer. According to the tested friends, the effect is quite effective.

As for whether there is any effect, anyway, the battery is useless, and everyone in the refrigerator, you friends may wish to give it a try.

Give your phone a CPR.

Does the phone often lose power? Or is it clear that after a long period of time, there is no electricity?

I must have doubted whether the end of life of the mobile phone?

Don't worry it's just a moment of "heartbeat stop", as long as a small eraser can be brought back to life.

After removing the battery, wipe the contact (brass piece) on the battery with an eraser and put it back on the phone. You will find it amazing. It has survived and is still new.

The page contains the contents of the machine translation.