On the cell phone's basic knowledge
We have been on the phone's battery charging use and maintenance have different understanding of where I would like that since we are all unified point of view, and click to correct some mistakes.
Talking about the lithium-ion battery, the first to introduce a simple, so-called lithium-ion battery that is able to use the suction from the possession of lithium-ion carbon material as the negative electrode active material of batteries, lithium-ion symbol for the Li-ion. As we all know as the batteries are generally positive, negative, the lack of electrolyte, and other basic elements, lithium-ion batteries used in these materials are generally the following material:
Cathode: Lithium cobalt (LiCoO2), nickel acid lithium (LiNiO2) Lithium Manganese (LiMn 2 O 4), and so on;
Negative: The family of man-made graphite, natural graphite series, the series of coke and so on;
Divide: polyethylene (PE), polypropylene (PP), and other components of the single-or multi-layer micro-porous membrane;
Electrolyte: propylene-carbonate (PC), ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC), methyl ethyl carbonate (MEC), and other components of a dollar , Binary or ternary mixture
On the market for sale of most of the lithium-ion batteries are lithium cobalt as cathode, graphite for the negative series of batteries.
Lithium-ion batteries is the work of the mechanism: when the rechargeable batteries, cathode material of lithium-ion stripping form, embedded in the negative electrode modified graphite layer; discharge the battery, lithium-ion from the graphite layer inlay off, and returned to the ground through the membrane to the cathode isolation Lithium cobalt oxide of the layered structure. With the charging and discharging of the lithium-ion continuously carried out from the anode and cathode and to embed extrusion, so some people call the "rocking chair battery," the single lithium-ion battery rated voltage of 3.6V, charging voltage limit for 4.2V, voltage discharge limit To 2.5V.
Lithium-ion rechargeable battery process is divided into two steps: First, constant current charge, the constant current, constant voltage increase to 4.2V charge voltage when the time will automatically switch to charging voltage, constant pressure in the charging voltage constant current Is getting smaller and smaller until the pre-charge current is less than the value, so it was with direct charge of the cell phone battery charge for the time clearly show that has full power grid, but still charge that it is, in fact, this time the voltage has been achieved Therefore, the 4.2V power grid over for the show, during that time is rechargeable constant pressure, then someone may ask, What was the purpose of charging voltage, direct current used to charge 4.2V is not yet on line, in fact, very easy Explained, because every cell contains a certain degree of resistance, when used for constant current charge to 4.2V, 4.2V this is not the actual battery voltage, but the battery voltage coupled with resistance on the consumption of battery voltage And it, then great, if current consumption in the resistance of the voltage is great, so it is the actual battery voltage may be much smaller than 4.2V, the constant pressure to use the process of charging, the charge current gradually down , So the actual battery voltage is very close to 4.2V.
We in the use of lithium-ion battery in the process of fact, there is no need to know so much, as long as we know how to charge, how to discharge, how can we make use of the battery and maximize the role of the good performance of the cycle. Next, I would like to talk about this aspect of my views:
1. Lithium-ion battery is the best use of the original chargers failure to comply will lead to a certain extent of the damage and impact of its battery life;
2. Wall Décor & Hangings and charge straight for the problem, I think, if time permits to use the best Wall Décor & Hangings, which can extend the battery life at the same time increase the capacity of a single charge;
3. If you do not use the battery for a long time, then it is best to charge about 40% of the electricity in the 10 ~ 30 ℃ temperatures to preserve and make up about a half-yearly electricity;
4. For just bought a new battery, it is said that three times before charging to charge more than a dozen hours in order to fully activate the battery, I think that there is no need, of course, the new battery is the capacity of the previous than later to be reduced, It was a long-term storage battery, the active substance on the surface caused by passive, I think the previous charge by Wall Décor & Hangings charge to green after 12 hours is sufficient, of course, charging time with your charger and your battery charge current The capacity of the various changes will be, the longer the charge time is not a word, It would be counter-cell activation, on the contrary will affect the life, serious (if your charger voltage accuracy not control) will be an explosion.
5. In the long-term use of cell in the process we often have an understanding of the misunderstanding, I need to talk with you, we tend to think that the use of batteries is a certain number of times, for example, is 500 times, so we have to fully use So every time charge of as much as possible must be filled, every discharge it as much as possible to put the clean, so it seems that the use of the most efficient use of, this is not the case, the battery life with you is the use of a certain relationship If you battery life is a cycle of 500 times, if you use proper, then perhaps it can use 700 to 800, so that the correct way is to use the charge should not be too full charge, about 90% will be enough, in the course of the use of To see low-power, we can immediately charge, rather than wait until it automatically shut down or even shut down automatically after the charge is not carried out, we have done in the laboratory this test: 80% DOD of the battery life of more than 100% DOD's long battery life of about 30%;
6. It is also very important, lithium-ion battery charger for the very strict requirements for charging voltage is very strict restrictions, you have to look at it is that the requirements of 4.1V or 4.2V, because of the negative use of graphite when the series, then limit When voltage 4.2V, if the negative series of coke is used, then so is the limit voltage 4.1V, the battery on a general description will be short and the battery charger must match, you can not use the charger 4.2V to 4.1V charge of the Batteries;
7. It must be emphasized: can not use nickel-metal hydride rechargeable batteries or nickel-chrome battery charger to the rechargeable lithium-ion battery, this will not only damage the battery and there may be an explosion;
8. Lithium-ion batteries and memory does not function, so that when there is not rechargeable nickel-metal hydride batteries and nickel-chromium batteries need to discharge the same, it's time for charge and discharge.
All in all, not superstition in the first 12 hours of charging three times, and do not always afraid of deliberately failing to stop the discharge, as long as possible is run out of charge, with full, do not go too much emphasis on what the cell phone's battery life is a long, Otherwise, it will only self-defeating
