Correct activation of lithium battery method analysis

In the mobile phone, whether from the perspective of technology assessment or price considerations,The battery occupies an important position.Nowadays, the market is selling mobile phone, the battery used has been basically completed, from nickel battery lithium battery transition.May be due to cell phone battery has just completed a revolution of nickel batteries and lithium battery, so people understanding of lithium-ion battery is not unified, in many cases are popular incorrect statement and practices.Know something about the knowledge of lithium-ion batteries, therefore, to master the correct way of using the lithium battery is necessary.

A, the kinds of lithium battery:

Currently on the market are mainly used by the secondary battery nickel metal hydride (Ni - MH) and lithium ion (Li - ion) two types.Lithium ion batteries already in the production of liquid lithium ion battery (Li and polymer lithium ion batteries(LiP) two kinds.So in many cases, the battery on the Li - ion, must be a lithium-ion battery.But is not necessarily a liquid lithium ion battery, it is possible that the polymer lithium ion batteries.

Lithium ion battery is the improved product of lithium-ion batteries.Lithium lithium batteries have long ago, but it is a kind of highly active (remember its position in the periodic table?)Metal, it is not safe when using, often burning during charging, burst, and then there is the modified lithium ion battery, joined the inhibit lithium active ingredients (such as cobalt, manganese, etc.) so that the lithium electricity real reached a safe, efficient, convenient, and old lithium batteries has been basically eliminated.As for how to distinguish them, will be able to identify from the battery logo, lithium batteries for Li, lithium ion battery for Li - ion.Now, laptops and mobile phones using the so-called "lithium battery", are lithium ion batteries.

The basic structure of modern batteries including the anode, cathode and electrolyte three elements.As one kind of batteries, lithium ion battery also has the three elements.General lithium-ion technology using liquid or inorganic gel electrolyte, so need to accommodate combustible solid shell, the active ingredient, this increases the weight of the battery and cost, also limits the size and shape of flexibility.In general, the smallest thickness of liquid lithium ion secondary battery is 6 mm, then the decrease was more difficult.

And the so-called polymer lithium ion battery is in the three main structure at least one or more than one use of polymer materials as its main battery system.

A new generation of polymer lithium ion battery has very high on the degree of polymerization of materialized, so the shape can be thin shape is changed (0.5 mm the thinnest) and arbitrary shape, arbitrary area, greatly improving the battery design flexibility, which can meet the needs of the product, made into any shape and the capacity of the battery.At the same time, polymer lithium ion battery energy per unit of a 50% increase over the current general lithium ion battery, its capacity, charge and discharge characteristics, safety, working temperature range, the cycle life and environmental performance, and so on are the lithium ion battery has greatly improved.

Now on the market sales of liquid lithium ion batteries (LiB) in the case of the overcharge, easy to cause the relief valve to crack and the situation of the fire, it is very dangerous, so must add protection IC circuit in order to ensure the battery overcharge situations will not occur.And polymer lithium ion battery, this type of battery in terms of relative liquid lithium ion battery has good resistance to charge and discharge characteristics, therefore to protect plus IC circuit requirements may be extended appropriately.Moreover in terms of charging, polymer lithium ion battery can use IC constant current charging, and adopted by the lithium ion secondary battery CCCV (Constant Current - Constant Voltage) compared to the time needed for charging way can shorten the waiting time of many.

The application of lithium batteries, mobile phone manufacturers

Although in recent years, almost all manufacturers have tended to use lithium ion battery, but the world each big mobile phone maker's choice of battery or have their own characteristics and habits, such as once in the same historical period.

Nokia: the Ni - MH (Ni-Mh) batteries, LiB (liquid lithium ion batteries, not using LiP (polymer lithium ion batteries.

Ericsson: the Ni - MH battery, LiB batteries, LiP.

MOTOROLA: the Ni - MH battery, LiB, not LiP cell.

It's not hard to find, from the earliest for the mobile use LiP, polymer lithium ion battery this Ericsson embody the essence of technology pioneer of his mobile phone.According to the information I find indicated that the polymer lithium ion battery main manufacturer for Japan's SONY, Panasonic, GS, etc. Several companies, production reached 21 million in 2000, only 50% were Ericsson mobile phone accessory.To enter in 2002, lithium ion battery in other mobile phone makers have also been a wide range of application and popularization.But in the use of polymer lithium ion battery, is far from reach gained popularity in all mobile phone manufacturers of products, widely used remains to be time.

, on the other hand, although the advantages of lithium ion batteries, but also have defects, such as high prices and fewer charge and discharge and so on.Lithium battery charge and discharge times only 400-600, specially improved products but also more than 800 times.And charging of nimh batteries can reach more than 700 times, some good quality product to charge and discharge of up to 1200 times, such a comparison, nickel metal hydride batteries to live longer than lithium battery.In addition, the price of nickel metal hydride batteries is much lower than lithium batteries.But strictly speaking, lithium batteries will also has a memory effect, only the memory effect is very low, basically can be neglected.

It seems that there is no perfect battery.

Third, the use of lithium ion batteries

This part is the focus of this article, we point to talk about three o 'clock.

1, how to new battery

That should be paid attention to in using lithium battery, battery placed after a period of time to enter a dormant state, capacity is lower than normal at this time, use time is shortened.But the lithium battery is easy to activate, if after 3-5 times the normal charge and discharge cycle can activate cells, back to normal capacity.Due to the characteristics of lithium battery itself, determines its almost no memory effect.So new lithium-ion batteries in the user's phone in the process of activation, is don't need special method and the device.Is so in theory, not only from my own practice, from the start with a standard method to charge this way of "natural activation" is the best.

For the "activation" of lithium-ion batteries, many say: charging time must be more than 12 hours, if you do this three times, in order to activate the battery.This "the first three time charge to charge more than 12 hours", apparently from nickel battery, such as nickel cadmium and nickel metal hydride) continue down.So that, the outset misinformation, so to speak.Lithium-ion and nickel batteries charging and discharging characteristics have very big difference, and can be very clear tell you, I have looked at all serious formal technical data will emphasize overcharge and over discharge of lithium batteries, especially liquid lithium ion battery caused great damage.And charging in accordance with the best charging standard time and standard methods, especially don't charging for more than 12 hours long.Usually, the introduction of charging method, on the phone's manual standard charging method is suitable for the mobile phone.

In addition, the lithium battery cell phone or the charger will automatically stop after the battery, there is no nickel electric charger of the so-called "trickle charging for 10 hours.That is to say, if your lithium battery, after full on the charger is Bai Chong.And none of us there is no guarantee that the battery charge and discharge protection circuit will never change and quality according to the features of foolproof, so your battery will be on the brink of danger for a long time.This is another reason we object to a longer charge.

Charging in addition on the phone for some, after more than a certain amount of time, if you don't go to remove the charger, the system does not stop charging, will also begin to discharge - charging cycles.Perhaps this vendor has its purpose, but apparently for life of battery and mobile phone/charger is unfavorable.At the same time, the charging takes a long time long, often need to be done in the night, and to power grid in China, many places are relatively high voltage in the night, and volatile.Have already said, in front of the lithium battery is very delicate, it is better than nickel electric resistance to fluctuation in charging and discharging ability worse, so it brings the risk of additional.

In addition, another aspect can not be ignored is the lithium battery is also not suitable for discharge, over discharge to the lithium battery is bad also.This leads to the following questions.

2, when in normal use should start charging

On our BBS, often can see this statement, because the number of charge and discharge is limited, so should be mobile phone battery electric light recharging as much as possible.But I find a lithium ion battery charge and discharge cycle experiment table, the cycle life of the data are listed as follows:

Cycle lifetime (10% DOD) : > 1000 times

Cycle lifetime (100% DOD) : > 200 times

The DOD is the abbreviation of the depth of discharge.From the table, but the depth of the number of charging and discharging, 10% DOD cycle life than 100% DOD much longer., of course, if the conversion to the actual charge relative to the total capacity: * 1000 * 200 = 200 = 100100%, 10% of the latter to fully charge and discharge is still relatively good, but in front of the net friend of the idea to do some correction: under normal circumstances, you should have a reservation, according to the principle of battery remaining power run out to refill charging, but if your batteries in your expected to 2 days can't insist on the whole during the day, it should start charging in a timely manner, of course, if you are willing to carry the charger to the office when BieLun again.

And you need to charge for the upcoming is expected to lead to the communication of the most important events in the busy, even when there are a lot more than battery, so you can just charge in advance, because you didn't really lose "1" time charge cycle life, namely "0. X", and often the x will be small

The principle of battery remaining power run out to refill is not want you to extremes.As widespread and long charging a saying that is "as far as possible put the cell phone battery power run out, had better use automatic shutdown".The practice of this kind of practice is just nickel batteries, purpose is to avoid the memory effect, unfortunately it also in lithium battery of circulating on today.Once someone because the cell phone battery low warning, without a charge to continue using has been used examples of automatic shutdown.The result from this example phone no response in the later charging and boot, had to send to the maintenance of the service.This is because the battery voltage is too low, caused by the excessive discharge that do not have normal charging and boot conditions.

3, the correct approach for lithium battery cell phone

Boil down to, I on the problem of lithium battery cell phones in use is the most important tip:

1, according to the standard time and procedure charging, even so will three times before;

2, when there is a hint when battery power is too low, should try to start charging in a timely manner;

3, the activation of the lithium battery does not need special method, in the normal use of mobile phone lithium batteries will naturally activation.If you are determined to use of "three times before 12 hours long charging activation" approach, in fact there will be no effect.

Therefore, all the pursuit of 12 hours long use the lithium battery cell phone charging and automatic shutdown, are wrong.If you've made according to the error, please correct in time, maybe it is not too late.

Of course, in the mobile phone and charger itself under the condition of good quality, protection and control circuit for lithium battery protection still has quite a guarantee.So the understanding of charging rules is the key, in some cases, also can make some concessions.Such as you find mobile phone must be charge before you sleep at night, you can also start charging before going to bed.The crux of the problem is that you should know what is the right thing to do, and do not deliberately according to error.

The page contains the contents of the machine translation.