In the phone, whether it is from a technical point of assessment or from the price consideration, batteries are very important position. Value today, the market is selling the phones, used batteries have basically completed the battery from nickel to lithium batteries transition. Perhaps as a result of cell phone battery had just completed a nickel batteries to lithium batteries revolutionary, so people’s awareness of lithium batteries are not uniform, and in many cases not correct to say and practice is quite popular. Therefore, to understand that knowledge of lithium batteries, lithium batteries have the proper way of using it is very necessary.
First, the type of lithium battery:
At present the market of secondary batteries used mainly in nickel-metal hydride (Ni-MH) and lithium-ion (Li-ion) of two types. Lithium-ion batteries have been mass production of liquid lithium-ion battery (LiB) and polymer lithium-ion battery (LiP) two. Therefore, in many cases, battery on a mark of Li-ion, lithium-ion batteries must be. But not necessarily that of liquid lithium-ion battery, is also possible that the polymer lithium-ion battery.
Lithium-ion battery is a lithium battery modified products. Lithium batteries have a long time ago, but the lithium is a highly active (still remember it in the periodic table of elements in the right position?) Of the metal, it is not very safe when used often in charge when burning, burst situation, then there will be a modified lithium-ion batteries by adding the element lithium can inhibit the active ingredient (such as cobalt, manganese, etc.) so that the lithium can really achieve a safe, efficient, convenient, and the old lithium batteries also basically eliminated. As to how to distinguish them from the battery on the logo will be able to identify, lithium battery for Li, lithium-ion battery for Li-ion. Now, notebook and mobile phone use of the so-called “lithium batteries”, in fact, are lithium-ion battery.
The basic structure of modern batteries, including cathode, anode and electrolyte three elements. As a battery, lithium-ion battery also has these three elements. Lithium-ion technology in general or inorganic colloidal liquid electrolyte, so the need for solid combustible shell to accommodate the active ingredients, which increased the battery weight and cost, also limits the size and shape of flexibility. In general, liquid lithium ion secondary battery is the minimum thickness of 6mm, a further reduction on the more difficult.
The so-called polymer lithium-ion battery in the three major tectonic at least one or more of the use of polymer materials as its main battery system.
A new generation of polymer lithium-ion polymer batteries in the extent of the already very high, so the shape can be achieved on the shape of thin (the thinnest 0.5 mm), any size and any shape, and greatly improving the design of a flexible battery and thus be in line with the product demand has resulted in any shape and capacity of the battery. At the same time, polymer lithium-ion battery unit of energy than the current lithium-ion batteries in general increased 50 percent, of its capacity, charge-discharge characteristics, safety, working temperature range, cycle life and environmental performance and so on than a large lithium-ion battery margin improvement.
At present the market by sales of liquid lithium-ion (LiB) battery in the case of over-charging, and thus easily lead to the breakdown of the fire safety valve case, this is very dangerous, so necessary for the installation of the protection of IC circuits to ensure that the battery does not occur over Charging the case. The polymer lithium-ion battery connection, this type of battery is relatively liquid lithium-ion battery has a good resistance in terms of charge-discharge characteristics, it’s protected IC circuits can be appropriate to relax the requirements. Also in the charge, the polymer lithium-ion batteries can make use of IC constant current charging, with the lithium ion secondary battery used in CCCV (Constant Currert-Constant Voltage) charging method the time required for comparison, can shorten the waiting time for many.
Second, handset manufacturers on the application of lithium batteries
Although in recent years almost all manufacturers have a preference for lithium-ion batteries, but the world’s major handset manufacturers the choice of batteries or have their own characteristics and habits, for example, has a history in the same period:
Nokia: The Ni-MH (Ni-MH) battery, LiB (liquid lithium-ion) batteries, did not use the LiP (polymer lithium-ion) batteries.
Ericsson: The Ni-MH battery, LiB battery, LiP battery.
Motorola: the use of Ni-MH battery, LiB battery did not use the battery LiP.
Is not difficult to find, from the first choice for mobile phones LiP polymer lithium-ion batteries this matter, Ericsson reflect their true colors of a pioneer in handset technology. I find the information shows that the main polymer lithium-ion battery factory in Japan SONY, Panasonic, GS, such as companies, in 2000 the production capacity of 21 million, of which 50% for Ericsson mobile phones supporting. To enter in 2002 today, lithium-ion batteries in other mobile phone manufacturers also have a wide range of application and popularization. However, in polymer lithium-ion battery use, but also far from being reached on all mobile phone manufacturers of products to be of universal extent有待时日also widely used.
On the other hand, although the advantages of lithium-ion batteries a lot, but there are also shortcomings, such as high prices and fewer charge-discharge and so on. Lithium battery charge and discharge the number of only 400-600 times, specially to improve the products on many occasions, however 800. And nickel-metal hydride rechargeable batteries to reach the number of more than 700 times, some good quality products that charge and discharge up to 1200 times, such a comparison, the Ni-MH battery life than lithium batteries. In addition the price of nickel-hydrogen batteries are also much lower than the lithium batteries. Moreover, strictly speaking, lithium batteries have the same memory effect, but its memory effect is very low, basically negligible.
Seen in this light, there is no perfect battery.
Third, the use of lithium-ion battery
Part of this is the focus of this article, we discuss three points.
1, how to charge the battery for the new
In the use of lithium batteries should be noted that some time after the battery is placed into the dormant state, when the capacity is lower than normal, the use of time has also come to shorten. However, lithium batteries can easily activated, as long as after 3-5 times the normal charge-discharge cycle can be activated batteries, back to normal capacity. Due to the characteristics of lithium-ion battery itself has determined that it is almost no memory effect. Phone so that users of the new lithium battery in the activation process does not require special methods and equipment. Not only in theory, this is the case, from my own practice, from the very beginning, the use of standard methods of charging such a “natural activation” approach is the best.
Lithium batteries for the “activation” problem, many say is: charging time must be more than 12 hours, repeated three times to do in order to activate the battery. This “The first three charging more than 12 hours to charge” is obviously from the nickel battery (such as nickel cadmium and nickel metal hydride) inherited from the argument. Therefore, this argument can be said to misrepresent the start. Lithium batteries and nickel battery charge and discharge characteristics of a huge difference, but also very clear to tell you that I have access to all the serious formal technical information and over-emphasized rechargeable lithium-ion battery will discharge, in particular liquid lithium ion battery causing great harm. Thereby charge the best time and in accordance with the standards of the standard method of charging, especially not to carry out more than 12 hours of super-long charge. Typically, handset manuals introduced the charging method is suitable for the mobile phone standard charging method.
In addition, mobile phone or lithium batteries in the battery charger will automatically stop after a charge, there is no electricity nickel charger for 10 hours the so-called the “trickle” charge. In other words, if your lithium batteries in a later, on the white charger is also rechargeable. And we can not guarantee that no one battery charge and discharge protection circuit features and never change and the quality of safety, so your battery will be long-term hovering at the edge of danger. This is why we oppose the long charging another reason.
In addition, on some phones, charging more than a certain amount of time, if not remove the charger, when not only did not stop charging system, will also be the beginning of discharge – charge cycle. Perhaps this practice has its own purpose of vendors, it is clear that on the battery and cell phone / charger is the life of a disadvantaged position. At the same time, long charging would take a long time, often at night, and to China’s power grid situation, at night in many parts of the higher voltage, but also volatile. Said earlier, the lithium battery is very delicate than nickel in the electric charge and discharge aspects of fluctuations in the capacity of resistance is much less, so this brings additional risk.
In addition, can not be ignored another aspect is not suitable for lithium batteries have the same discharge, over-discharge of lithium batteries is also very unfavorable. This leads to the following questions.
2, normal use should begin charging
In our forums, often see this argument, because the number of charging and discharging is limited, so mobile phones should be used up as much as possible battery recharge. But I find a lithium-ion battery charge and discharge cycle test table, on the cycle life data is as follows:
Cycle life (10% DOD) & # 118bscript:> 1000 times
Cycle life (100% DOD) & # 118bscript:> 200 times
Which is the depth of discharge DOD abbreviation. Can be seen from the table, rechargeable frequency and depth of discharge, 10% DOD at the time of the life cycle than 100% DOD must be much longer. Of course, if the actual charge equivalent to the relative total capacity: 10% * 1000 = 100,100% * 200 = 200, which is fully charge and discharge, or better than some, but that argument in front of friends to do some of the amendments: Under normal circumstances, you should have a reservation in accordance with the remaining battery power and then run out of the principle of rechargeable charge, but if your battery is expected in the first two days you can not insist on the whole time during the day, they should have started on time charge, of course, if you are willing to back the charger to the office again when别论.
And you need to charge to cope with the anticipated upcoming busy communications will lead to an important event in a time when, even though there are many more than the battery power, then you just charge ahead of time, because you did not really loss of “1″ sub-charge cycle life , that is, “0.x” times only, and often this x will be very small.
Run out of battery power and then filling the remainder of the principle does not mean that you go to the extreme. And long recharge widely as saying that “as far as possible the cell phone batteries run out, it is best to use automatic shutdown.” This approach is only on the practice of nickel batteries, to avoid occurrence of memory effect, unfortunately, it is also spread of lithium batteries on this. It has been too low because the cell phone battery warning appears, still do not charge to continue to use has been used in automatic shutdown example. The outcome of this case the cell phone later in the boot of charge and there was no response, had to give customer service overhaul. This is in fact due to excessive discharge as a result of the battery voltage is too low a result that does not have the normal charge and boot conditions.
3, on the lithium battery cell phone the right way
To sum up, my cell phone in the use of lithium-ion battery charging and discharging of the most important tips are:
1, in accordance with the standards and procedures, charging time, even the first three to do so;
2, When the phone prompts when electricity is too low, it should be possible to start charging a timely manner;
3, lithium batteries do not need to activate the special method, in normal use of cell phones will naturally activated lithium batteries. If you insist on using the spread of “the three previous 12-hour long activation charge” approach, in fact, will not have effect.
Therefore, all the pursuit of super-long 12-hour rechargeable lithium battery and the phone is used in automatic shutdown, are wrong. If you used to be in accordance with the wrong done, please correct and timely, and perhaps it is not too late.
Of course, in the mobile phone and charger circuit protection and control of their own good quality cases, the protection of lithium batteries or have guaranteed. Therefore, understanding the rules on the charge is the key, in some cases can make some concessions. For example, you discover that your phone must be recharged at night before going to bed, you can also begun to charge before going to bed. The crux of the matter, you should know what is the correct way and not in accordance with the deliberately wrong to do so.
