3.7V lithium battery first charge for a long time

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

  For the "activation" problem of lithium batteries, many statements are: Charging time must be more than 12 hours, repeated three times in order to activate the pool. This "first three-three charging 12 hours more" said that it is obvious to continuing from nickel batteries such as nickel-cadmium and nickel-hydrogen. So this kind of saying, you can say that the beginning is misuse.

The charging and discharge characteristics of lithium batteries and nickel batteries have a very different, and it can be very clear to tell you that over charge and over-discharge will cause huge damage to lithium batteries, especially liquid lithium-ion batteries. Therefore, charging is preferably charged according to standard time and standard method, especially for more than 12 hours of long charging. Many new batteries described in the mobile phone manual must have more than twelve-hour statements! In addition, the mobile phone or charger of the lithium battery will automatically stop after the battery is full, and there is no so-called continuous continuation of the nickel electric charger.

10 hours of "trickle" charging. That is, if your lithium battery is full, it is also white charging on the charger. In addition, after the charge is over a certain time, if the charger is charged, if the charge is not removed, the system will not only stop charging, but will also start the discharge - charging cycle.

Perhaps the manufacturer of this practice has its own purpose, but it is clear that the battery and mobile phone / charger are unfavorable. In addition, another aspect of not ignored is that lithium batteries are also not suitable for over-discharge, and over-discharge is also very disadvantageous to lithium batteries. When you should start charging in normal use, we can often see this: Because the number of charge and discharge is limited, the electric battery should be charged as light as possible.

However, this statement is obviously wrong! Under normal circumstances, you should reserve the principle of retention of the battery remaining and charge (but it is definitely not to be turned to charge), if your battery is expected to be It is impossible to insist on the whole day, you should start charging in time! And when you need to charge to cope with the upcoming an important event that will lead to a busy communication, even if there is still a lot of power in the battery, then you also Only charge in advance, because you don't really lose a charging cycle life! The power of the battery remaining is not required to take the extreme. One way to circulate as long is the same, "Try to use the battery's battery, it is best to automatically shut down". This practice is actually just the practice of nickel battery, the purpose is to avoid memory effects, unfortunately, it is also circulating it on the lithium battery.

Some people have appeared after the warning of the battery battery is too low, still not charging the use of automatic shutdown examples. As a result, the mobile phone in this example has no response in the later charging and boot, and has to be sent to overhaul. This is actually because the battery causes the voltage to be too low due to excessive discharge, so that there is no normal charging and power-on conditions.

Actual experience proves that the discharge depth reaches a 100% lithium battery scrap rate of 50% (for many years, the extension of the lithium-electrical maintenance power supply for the discharge depth of more than 99% can activate only half, the remaining half number of scraps!) For lithium battery The correct practice is attributed, and I am the most important tips for the charging and discharging problem in the use of lithium battery mobile phones are: 1. According to the standard time and program, even the top three times will be done so. First, charge the charger (line charge) Plug with the power supply and then insert the charger's output of the phone.

Some people want to ask: Is it on the boot charging, or shut down? A: do it! Handful of mobile phones can not be able to charge the mobile phone when shutdown The backup battery (small lithium electricity on the motherboard is charged), which can be charged for the backup battery with direct charge in the standby state! The lithium battery is mostly damaged in the case of over-discharge!. If you insist on "the first three 12-hour long charging activation" method, it will not have effects. In general, depending on the battery capacity size, the charging time is between 2,000.

Therefore, all the practices that pursue 12 hours of super long charging and use lithium battery mobile phone automatic shutdown is wrong! I am a sticky person, I personally think this is very correct. I check the relevant chapter books in this book "High-energy Chemical Power", the lithium battery can be charged at will, and the charging cycle of the battery on the battery is . For example, a lithium battery nominal 900mAh was filled with 900mAh for the first time, and then filled with 300mAh and then used 200mAh at this time the battery accumulated discharge 900mAh battery used a cycle.

Oh, the life is reduced. More than a long time is full of charging time = battery capacity ¡Á (1.2-1.

5) / charger charging speed general mobile phone, the notebook will have some electricity, because the lithium battery has a certain amount of power, so you can use it immediately , Not necessarily to charge again. From theory and practice, the first charge of the lithium battery is to take "re-use" or "filled with re-use" is exactly the same. There is a limit here, the factory date is more than half a year, because the power is too low at this time.

Some lithium batteries have the first three lithium batteries, and the mobile phone lithium battery is activated to the battery. In fact, these activation is not necessary to be done. After the first three charge and discharge, the mobile phone lithium battery, the lithium battery will basically recover the best state.

At the first time, the lithium battery can be taken down from the charger when it is charged, and the lithium battery does not exist when the lithium battery is used, so the lithium battery and the nickel hydrogen battery. The charge and discharge characteristics have a very large difference. If the lithium battery, lithium battery pack, lithium-ion battery has a great circulating life, so it is full of electricity, which will continue to charge the battery.

When charging the lithium battery first charge, separate the lithium battery and the charger after full. Lithium batteries are automatically stopped after full (temporary), because the lithium battery has protection PMC protection, and there is no "continuous" trickle charging, which is the different places of lithium batteries and NiMH batteries. So, we need to pay attention when charging.

Electric life is generally 300-500 charging cycles. Assume that the amount of power supplied once is 1Q, if the amount of electricity after each charging period is reduced, the lithium battery can provide or supplement 300Q-500Q electric power in its life. Thus, if you charge 1/2 each time, you can charge 600-1000 times; if you use 1/3 every time, you can charge 900-1500 times.

Pushing in this class, if random charging, the number is not. In short, no matter how it is charged, the electricity added to the 300Q-500Q is constant. Therefore, we can also understand this: the lithium battery life and the total charge of the battery are related to the number of charging.

Deep offcle deep charge and shallow shallow charge is not much affected by lithium battery life. So, when some manufacturers have publicized, "a strong lithium battery can charge more than 1,500 times. "This is purely bullying.

In fact, shallow shallow charge is more beneficial for lithium-electricity, only if the product's power module is a calibration of lithium electricity, there is a deep institution. Therefore, the products that use lithium electricity supply do not have to be in the process, everything is convenient, charging, do not worry about affecting life. Lithium-ion battery, pay attention to three points: 1, how to charge new batteries In the use of lithium batteries, it should be noted that the battery is placed in a sleep state, at which time the capacity is below normal, and the time of use is also shorten.

However, the lithium battery is easy to activate, as long as it passes through 3-5 normal charge and discharge cycles, the battery can be activated, and normal capacity is restored. Due to the characteristics of the lithium battery itself, it determines that there is almost no memory effect. Therefore, the user's new lithium battery is in the process of activation, it does not require special methods and equipment.

Not only theory is theory, from my own practice, from the beginning, I use standard methods to charge this "natural activation" mode is the best. For the "activation" problem of lithium batteries, many statements are: charging time must be more than 12 hours, repeated three times in order to activate the battery. This "first three-three charging 12 hours more" said that it is obvious to continuing from nickel batteries such as nickel-cadmium and nickel-hydrogen.

So this kind of saying, you can say that the beginning is misuse. The charging and discharging characteristics of lithium batteries and nickel batteries can be very different, and you can tell you very clearly. All serious formal technical materials I have reviewed emphasize that they will overcharge and over-discharge will for lithium batteries, especially liquid lithium.

Ion battery causes huge damage. Therefore, charging is preferably charged according to standard time and standard method, especially for more than 12 hours of long charging. In addition, the lithium battery or charger will automatically stop after the battery is full, and there is no so-called "trickle" charging for nickel electric chargers.

That is, if your lithium battery is full, it is also white charging on the charger. And we can't guarantee that the characteristics of the battery's charge and discharge protection circuit will never change and quality, so your battery will be in dangerous edges. This is another reason why us oppose long charging.

In addition, after the charge is over a certain time, if the charger is not removed, the system will not only stop charging, but will also start the discharge - charging cycle. Perhaps the manufacturer of this practice has its own purpose, but it is clear that the life of the battery is unfavorable. At the same time, long charging takes a long time, often needs to be carried out at night, while in my country's power grid, the voltage in many parts is relatively high, and the fluctuations are large.

As mentioned earlier, the lithium battery is very delicate, it is much more resistant to the fluctuations in charge and discharge, so this is a dangerous danger. In addition, another aspect of not ignored is that lithium batteries are also not suitable for over-discharge, and over-discharge is also very disadvantageous to lithium batteries. This leads to the following problems.

2. When should I start charging during normal use Because the number of charge and discharge is limited, the electricity of the lithium battery should be charged as light as light. But I found an experimental table for lithium-ion battery charging cycles, and the data on the loop life is listed as follows: Circulation Life (10% DOD):> 1000 cycle life (100% DOD):> 200 times where DOD is discharge Depth English abbreviation.

As can be seen from the table, the number of chargeable times and the discharge depth, the cycle life of 10% DOD is much longer than 100% DOD. Of course, if it is equivalent to the relative total capacity of the actual charging: 10% * 1000 = 100, 100% * 200 = 200, the latter complete charge and discharge is still better, but the previous netizen's saying should be amended: in normal In the case, you should reserve the principle of recurring with the remainder of the battery, but if your battery is expected to stick to the whole day 2nd, you should start charging in time, of course, if you are willing Charger to the office is also. And when you need to charge to cope with the urgent event that will lead to a busy communication, even when there is still a lot of balances, then you only charge in advance, because you don't really lose "1" times charging cycle life That is, "0.

x" times, and often this X will be small. The principle of battery remaining electricity is not to be tired to extreme. One statement on the same flow as long charging, "Try to use the electric battery of the machine, it is best to use automatic shutdown".

This practice is actually just the practice of nickel battery, the purpose is to avoid memory effects, unfortunately, it is also circulating it on the lithium battery. Some people have appeared after the warnings of the machine battery, still not charging, continuing to use an example of automatic shutdown. As a result, the machine in this example has no response in the later charging and boot, and has to send a customer service.

This is actually because the battery causes the voltage to be too low due to excessive discharge, so that there is no normal charging and power-on conditions. 3, the correct way to the lithium battery is attributed, the most important tips for the charging and discharge problem in the use of lithium batteries are: 1, according to the standard time and program charging, even the top three times; 2, when the appearance When the machine is too low, it should be started to start charging in time; 3, the activation of the lithium battery does not require a special method, and the lithium battery will naturally activate in the machine. If you insist on "the first three 12-hour long charging activation" method, it will not have effects.

Therefore, all the practices that pursue 12 hours of ultra-long charging and use lithium batteries to automatic shutdown are erroneous. If you have done according to the wrong statement, please correct it in time, maybe it is not too late. 4.

Use a lithium battery to pay attention to the fire prevention, many people may be from the mobile phone to be familiar with the lithium battery. In fact, it has used many home appliances. Undoubtedly, the advantages of high efficiency, physical light, etc.

However, do you know that inappropriate use, it will make you "fire" upper body? The lithium battery has the advantages of light, high efficiency, low temperature (-40 ¡ã C), 0.3mm thick, lithium batteries of the stamp size can be used continuously for more than 5 years, in recent years, in recent years, the proclaimed alkaline dry batteries and manganese batteries have been gradually eliminated. Widely used in many high-end appliances and mobile phones.

Lithium batteries are different from the current manganese cells and alkaline dry batteries of zinc chloride and potassium hydroxide water-soluble electrolyte, which use organic media. Lithium battery positive electrode uses manganese dioxide, fluorinated lead, chlorinated sulfur and other materials. The lithium metal foil adopted by the negative electrode is in the general battery negative electrode, the ionization is strong, the positive and negative voltage is different, which improves the working performance of lithium batteries.

However, the lithium battery often occurs during use, combustion phenomenon, and light people affect the host, the heavy people will burn the host. According to reports, Japan has occurred in recent years, a family fire accident caused by lithium batteries. So why is the lithium battery heat, burned? After many materials in the lithium battery are in contact with water, severe chemical reactions can occur and release a large amount of thermal energy leading to fever, combustion phenomenon.

Manganese dioxide of the positive electrode of the lithium battery, only a small drop of water, can occur. After the chlorinated sulfur in the lithium battery is in contact with water, the heat energy is released while forming hydrochloric acid and sulfur dioxide, and several factors make the lithium battery become "fire" in life, so people must pay attention to waterproof, defense when using lithium batteries. Wet.

After various hosts are deactivated, remove the lithium battery to be placed in dry, properly kept in a safe place to prevent and avoid the occurrence of family fire accidents due to improper use of lithium batterie.

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