some tips about lithium battery
In the phone, whether it is assessed from a technical perspective or from price considerations, the battery is a very important position. Until now, the market is selling the mobile phones, used batteries have basically completed the acer travelmate 7520g battery from nickel to lithium transition. Perhaps because of cell phone battery has just completed a revolution of nickel batteries to lithium batteries, so there is no uniform understanding of lithium batteries, in many cases, inaccurate statements and practice is quite popular. Therefore, to understand a little knowledge of lithium batteries, grasp the proper use of lithium batteries is necessary.
Currently on the market used mainly nickel-metal hydride secondary batteries (Ni-MH) and lithium-ion (Li-ion) types. Lithium ion batteries are already in volume production of liquid lithium-ion battery (LiB) and lithium ion polymer battery (LiP) two. So in many cases, the battery mark the Li-ion must be the lithium-ion battery. But not necessarily liquid lithium-ion battery, is also possible that lithium-ion polymer battery.
Lithium ion battery is the improved product. Lithium batteries have a long time ago, but lithium is a highly active (remember it in the periodic table of the position?) Of metal, it is not safe when used often in charge when burning, burst case, then there will be a modified lithium-ion batteries, lithium element added to inhibit the active ingredients (such as cobalt, manganese, etc.) so that lithium truly achieve a safe, efficient, convenient, and the old lithium batteries also will basically eliminated. As to how to distinguish them from the battery of the label can identify lithium as Li, lithium-ion battery Li-ion. Now, laptops and mobile phones using the so-called "lithium batteries", are in fact lithium ion battery.
The basic structure of modern batteries, including cathode, anode and electrolyte three elements. As a battery, lithium ion battery also has three elements. General lithium-ion technology uses liquid or inorganic colloidal electrolyte, requiring combustible solid shell to accommodate the active ingredients, which increases battery weight and cost, also limit the size and shape flexibility. In general, liquid lithium ion battery is the minimum thickness of 6mm, a further reduction is more difficult. The so-called polymer lithium-ion batteries are three main structures in the at least one or more use of polymer materials as its main battery system.
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A new generation of polymer lithium-ion polymer battery in the extent of already very high, so the shape can be of thin (the thinnest 0.5 mm), of any size and any shape of greatly improved battery design and flexible modeling , so it can meet the demand for products, made of any shape and capacity of the battery. Meanwhile, the polymer lithium ion battery unit of energy than the current lithium ion batteries in general increased by 50%, of its capacity, charge and discharge characteristics, safety, operating temperature range, cycle life and environmental performance and so are relatively large lithium-ion battery rate of increase. Currently marketed in liquid lithium-ion (LiB) battery in the case of overcharging, and thus easily lead to rupture of the fire safety valve case, it is very dangerous, so the IC circuit protection must be installed to ensure that the battery will not happen over- charge of the case. The polymer lithium-ion batteries, the batteries of this type of liquid lithium-ion batteries in terms of relatively good resistance to charge and discharge characteristics, plus the external IC circuit protection requirements may be eased. In addition, in charge, the polymer lithium-ion battery can be charged using constant current IC with the lithium ion secondary battery used CCCV (Constant Currert-Constant Voltage) charging time required for comparison, can shorten the waiting time for many.
Although almost all manufacturers have in recent years tend to use lithium-ion batteries, but the world's major mobile phone manufacturers the choice or the battery has its own characteristics and habits, for example, had the same historical period:
Nokia: The Ni-MH (Ni-MH) battery, LiB (liquid lithium-ion) batteries, not by LiP (polymer lithium-ion) batteries.
Ericsson: The Ni-MH battery, LiB battery, LiP battery.
Motorola: The Ni-MH battery, LiB batteries, not by LiP battery.
Easy to see that the first choice for mobile phones from LiP polymer lithium-ion batteries on this issue, Ericsson demonstrated the true nature of their pioneering mobile phone technology. According to the information I find that the current major manufacturer of polymer lithium-ion batteries in Japan SONY, Panasonic, GS and so several companies, produced in 2000 reached 21 million, of which 50% of Ericsson mobile phone package. Into the 2002, lithium-ion battery cell phone in the other cell phone manufacturers also have been widely used and popular. However, the use of polymer lithium-ion batteries, but also far from all mobile phone manufacturers to get popularity of products, extensive application also remains to be seen. On the other hand, although the numerous advantages of lithium-ion batteries, but there are shortcomings, such as charge and discharge times of high prices and less so. Lithium battery charging and discharging of the number of only 400-600 times, specially modified products, but many times 800. The NiMH rechargeable Dell vostro 1310 battery can reach 700 times more than some quality products to charge and discharge up to 1,200 times, such a comparison, Ni-MH battery live longer than lithium batteries. In addition, prices for nickel-hydrogen batteries is much lower than the lithium batteries. Moreover, strictly speaking, lithium batteries have the same memory effect, but its very low memory effect, basically negligible. Hence, there is no perfect battery.
Part of this is the focus of this article, we talk about three points.
- 1, how to charge the battery for the new
The use of lithium batteries should be noted that after some time the battery is placed into hibernation, lower than normal capacity at this time, the use of time has also come to shorten. However, lithium batteries can easily activated, as long as after 3-5 times the normal battery charge and discharge cycle can be activated to restore normal capacity. As the battery lithium own characteristics, its decision is almost no memory effect. Therefore, the new lithium battery cell phone users in the activation process does not require special methods and equipment. Not only in theory that, from the practice of my own, from the outset, the standard method of charging that "activation" approach is the best.
For lithium batteries, "activate" problem, many say is: charging time must be more than 12 hours, repeated three times to activate the battery. This "three times before charging to charge more than 12 hours," saying, obviously from the nickel battery (such as nickel cadmium and nickel metal hydride) inherited from the statement. So this argument can be said to misrepresent the start. Lithium and nickel battery charge and discharge characteristics are very different, and can very clearly tell you that I have had access to technical information for all the serious official stressed the overcharge and over discharge will have lithium batteries, especially lithium liquid Ion battery causing great harm. Therefore the best charging method in accordance with standard time and standard charge, especially not for more than 12 hours of super-long charge. Typically, the statement introduced mobile phone charging method is suitable for charging the mobile phone standard method.
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In addition, lithium batteries cell phone or battery charger will automatically stop after full charge, there is no nickel-power charger for 10 hours the so-called the "trickle" charge. That is, if your lithium batteries in full, on the white charger is also sufficient. We can not guarantee anyone the battery charge and discharge protection circuit features and never change the quality of safety, so your battery will be at risk of long-term brink. This is also another charge against the chief reason. In addition, on some phones, the charge for more than a certain time, if not remove the charger, this time not only to stop charging system, will begin discharge - charge cycle. Perhaps the makers of this approach has its own purpose, but apparently the battery and cell phone / charger is detrimental to the life terms. At the same time, long charging takes a long time often need to be at night, while the situation of my grid, many parts of the night Dianya are high, and volatile. As already said, the lithium battery is very delicate, and its power than the nickel-resistance in the charge and discharge aspects of fluctuations in the capacity of much less, so this brings additional risk.
In addition, another aspect can not be ignored is also not suitable for Li-ion battery over discharge, over-discharge of the lithium batteries also very unfavorable. This leads to the following questions.
- 2, normal use should be when to start charging
In our forums, often see this argument, because the number of charging and discharging is limited, so it should be possible to run out of phone battery power recharging. But I found one on lithium-ion battery charge and discharge cycle test table, on the cycle life data is as follows:
Cycle life (10% DOD):> 1000 times
Cycle life (100% DOD):> 200 times
Which is the depth of discharge DOD abbreviation. Can be seen from the table, number of charge cycles and the depth of discharge, 10% DOD cycle life than when the 100% DOD for much longer. Of course, if the actual charge equivalent to the relative total capacity: 10% * 1000 = 100,100% * 200 = 200, the latter fully charge and discharge, or better than some, but the previous users of that argument do some amendments: Under normal case, you should have reservation in accordance with the remaining battery power runs out and the principle of full charge, but if your battery is expected in the first two days you can not adhere to the time of the day, you should start charging a timely manner, of course, if you are willing to back the charger to the office has a different matter.
And you need to charge to meet the anticipated upcoming busy communications will lead to an important event, even though the remaining battery power when there is a lot, you also simply Tiqian charge, because you are not really lost, "a" charge cycles life , that is, "0.x" times only, and often this x will be very small.
Remaining battery power runs out and the principle of charging is not want you to go to the extreme. And long charging a very wide spread as saying that "as far as possible the cell phone battery run out, it is best used in automatic shutdown." This is really just practice on nickel batteries, to avoid occurrence of memory effect, unfortunately, it is also spread of lithium batteries on this. It has been because the cell phone battery low warning appears, still do not charge to use the example has been used in automatic shutdown. The results in this example was charging the phone and boot in no response, had to give customer service overhaul. In fact, this is the result of excessive discharge as a result of the battery voltage is too low, so do not have a normal result of the charge and start conditions.
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- 3, the right way on the lithium Dell vostro 1520 battery cell phone
To sum up, I lithium batteries used in mobile phone charging and discharging, the most important tips are:
- 1, in accordance with the standards and procedures, charging time, even the first three have to do so;
- 2, When the phone prompts when electricity is too low and should start charging as much as possible in a timely manner;
- 3, lithium batteries do not require special methods of activation, normal cell phone use in lithium batteries would be natural activation. If you insist to use wisdom of "the three previous 12-hour long activation charge" approach, in fact, there will not be effective.
Therefore, all 12 hours long pursuit of the lithium battery cell phone charger and practices used in automatic shutdown, are wrong.If you used to be done in accordance with an error saying, please correct them in time, perhaps not too late. Of course, cell phones and chargers to protect themselves and control circuit of good quality cases, the protection of lithium batteries is quite assured. Therefore, the charge is the key to understand the rules, in some cases also may make some concessions.For example, you find that the phone must be charged before you go to bed at night, you can also start charging before going to bed. The key is, you should know what the right thing, and do not do it deliberately wrong.
Hopes that can help you.Tags:battery;acer travelmate 7520g battery;cell phone battery;
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