Correct Method for charging v880 + cell phone lithium battery

How can I charge a cell phone lithium battery ???

Do you want to charge 12 hours? Will it affect the battery after a long rush? How should I charge a lithium battery?

The following describes how to charge a cell phone lithium battery:

Tip: fully discharging battery will seriously affect the battery life. We strongly recommend that you purchase 2nd batteries for replacement! At present, the batteries used by mobile phones on the Chinese market have transitioned from nickel-hydrogen-nickel-cadmium batteries to lithium batteries, however, most people still use lithium batteries in the old wrong way of using nickel-hydrogen-nickel-cadmium battery. This article describes in detail how to use the most widely used battery lithium battery. The sampling statistics are made on the number of people who are using incorrect battery lithium battery.

Introduction:

Lithium-ion battery has been developing rapidly since its release in 1990 and is widely used in civil use. Lithium-ion batteries quickly occupy many fields with incomparable advantages of other batteries, such as well-known mobile phones, laptops, and small cameras, more and more countries have applied the battery for military purposes. The application shows that lithium-ion battery is an ideal small green power supply.

We often say that the superiority of lithium-ion batteries is for traditional Ni/CD and Ni/MH batteries. It has advantages such as low self-discharge rate and non-memory effect with high voltage to energy ratio and long cycle life.

Currently, the basic principle of lithium battery is the so-called "rocking chair theory ". The charge-discharge of lithium battery is not a traditional method to realize the transfer of electrons. In childhood, the lithium ion enters and exits in the crystal of the layer Zhuang material, causing energy changes. Under normal charge discharge, the entry and exit of lithium ion generally only changes the layer spacing, but does not damage the crystal structure. Therefore, in terms of charge discharge, lithium-ion battery is an ideal reversible battery. During the charge discharge, the lithium ion enters and exits at the positive and negative ends of the battery, just as the rocking chair shakes between the positive and negative ends. Therefore, some people refer to the lithium ion battery image as the rocking chair battery.

Mistakes in the daily use of lithium battery.

Many sayings about the "activation" problem of lithium battery are that the charging time must be over 12 hours, and the battery must be retried three times to activate the battery. This "charge for the first three times is charged for more than 12 hours" is obviously a continuation of the statement from the nickel battery (such as nickel-cadmium and nickel-Mh. Therefore, it can be said that it was a false positive at the beginning. After sampling, we can see that a considerable number of people confuse the two battery charging methods.

The charging and discharging characteristics of lithium battery and nickel battery are very different, all the serious official technical materials that have been reviewed emphasize that charge and discharge will cause great damage to lithium batteries, especially liquid lithium-ion batteries. Therefore, it is best to charge according to the standard time and standard method, especially do not charge over 12 hours.

Generally, the charging method described in the mobile phone manual is a standard charging method suitable for the mobile phone.

In addition, the cell phone or charger of the lithium battery will automatically stop charging after the battery is full, and there is no such thing as a "streaming" charge that lasts for more than 10 hours.

That is to say, if your lithium battery is fully filled, it is also a white charger. No one of us can guarantee that the battery charging and discharging protection circuit features will never change and the quality will be safe, so your battery will be on the verge of danger for a long time. This is another reason for us to oppose long charging.

The following table lists the cyclic life data of lithium-ion battery charging and discharging cycles:

Cycle Life (10% DOD):> 1000 times

Cycle Life (100% DOD):> 200 times

DOD is the abbreviation of discharge depth. As can be seen from the table, the number of recharges is related to the discharge depth. The cycle life of 10% DOD is much longer than that of 100% DOD.

Of course, if it is equivalent to the actual total charge capacity: 10% * 1000 = 100,100% * 200 = 200, it is better to fully charge and discharge the latter.

However, the life of a lithium battery is mainly reflected in the charging and discharging cycle. This cycle is an absolute concept. The last time 30% of the power was used, the power was fully charged, and the next time 70% of the power was used, the power was fully charged, this is just a charging cycle. Therefore, the lithium battery is still used in accordance with the lithium battery inventor's slogan "out-of-the-box, out-of-the-box.

Ultra-long charging and full use of empty power will cause excessive charging and over-discharge, which will permanently damage the positive and negative sides of the lithium-ion battery. From the molecular level, excessive discharge will lead to excessive release of lithium ion in the negative carbon electrode and collapse its layered structure. Excessive charging will hard pack too many lithium ions into the carbon structure of the negative electrode, and some of the lithium ions can no longer be released. this is why the lithium-ion battery is usually equipped with a charge-discharge control circuit.

Lithium-ion battery generally comes with a management chip and a charging control chip. the management chip has a series of registers, including capacity, temperature, ID, charging status, discharge times, and other values. these values gradually change in use. In the instruction, the main function of "using a month or so should be fully filled once" should be to correct improper values in these registers, so that the battery charging control and nominal capacity are consistent with the actual situation of the battery.

The battery statistics chip records the discharge curve (voltage, current, time) to sample and calculate the battery power. This is the wh we read in battery information. value. the discharge curve of the lithium-ion battery changes after multiple use. If the chip has never been able to read a complete discharge curve again, the calculated power is inaccurate. so we need to deeply charge the battery chip.

The correct method and precautions for daily use of lithium battery are provided.

During the first three charging times, there is no need to charge the battery for an extraordinary period of time, such as 12 hours to activate the battery. The charging circuit was originally protected and plug-in was useless. Full discharge should be avoided during normal use (black screen power-off is used), the best way is to buy 2nd batteries to replace and use in time.

After a long period of unoccupied storage, or frequently used as a charge, the method is to charge and discharge completely, and then the battery can be used as a charge, it is only after a long period of use that you need to re-complete the charge-discharge and re-correction again.

If you do not need a battery, it is recommended to charge to 40% and then place it to protect the battery. Finally, the life of the lithium battery is mainly reflected in the charging and discharging cycle. This cycle is an absolute concept. The last time 30% of the power was used, the power was fully charged, and the next time 70% of the power was used, the power was fully charged, this is just a charging cycle.

When to start charging during normal use:

We can often see this saying: because the number of charge and discharge times is limited, we should use up the power of the cell phone battery to charge again. However, this statement is obviously incorrect!

Under normal circumstances, you should record the charge based on the principle that the remaining battery is used up and recharged (but it is definitely not used for shutdown and recharging ), if your battery is not expected to last for the whole day, you should start charging in time! And when you need to charge to cope with important events that are expected to lead to busy communications, even if there is still a lot of power remaining in the battery, you just need to charge in advance, because you have not really lost one charging cycle! The principle of remaining battery power usage and re-charging does not require you to go to the extreme. A widely spread saying like long charging is that "it is best to use up the battery power of the mobile phone whenever possible and use automatic shutdown ". This is actually just a nickel battery approach, the purpose is to avoid the "memory effect", unfortunately it also spread on the lithium battery.

There was a warning that the battery of the mobile phone was too low, and it was still not charged. Results In this example, the mobile phone did not respond in the subsequent charging and startup, and had to be sent for repair. This is because the battery voltage is too low due to excessive discharge, so that it does not have normal charging and boot conditions. Practical experience shows that the lithium battery scrap rate reaches 100% with a discharge depth of 50% (more than half of the battery maintenance power supplies with a discharge depth of more than 99% have been activated, and the remaining half have been decommissioned !)

Correct practices for lithium battery cell phones:

To sum up, the most important tips for lithium battery cell phones in use are:

1. Follow the standard time and procedures for charging, even the first three times, first plug in the charger (wire charging) and then plug in the charger output end into the mobile phone charging port, someone has to ask: is it good to start and charge, or is it good to shut down and charge? A: Yes! A few brands of mobile phones cannot be charged for the backup batteries in their mobile phones (small lithium batteries on the motherboard, power the 32.768 clock crystal) when they are powered off, you can only use direct charge in standby mode to charge the backup battery!

2. When the cell phone power is too low, you should start charging as soon as possible; the lithium battery is the most vulnerable to damage in case of excessive discharge!

3. Lithium Battery activation does not require special methods. The lithium battery will be activated normally on the mobile phone. If you insist on using the "Activate" Method for the first 12 hours that have been circulated, it will not actually work. Generally speaking, the charging time is between 2-4 hours depending on the battery capacity. Therefore, it is wrong to apply 12 hours of ultra-long charging and to automatically shut down lithium battery phones!