Lithium Polymer battery Use method polymer lithium battery charging precautions

Lithium-ion battery use, note three points: 1, how to charge for a new battery in the use of lithium batteries should be noted that the battery has been put into hibernation after a period of time, when the capacity is below normal, the use of time also shortened. But the lithium battery is easy to activate, as long as 3-5 times the normal charge and discharge cycle can activate the battery, restore normal capacity. Because of the characteristics of the lithium battery itself, it is determined that it has little memory effect. Therefore, the user new lithium battery in the activation process, there is no need for special methods and equipment. 　　Not only in theory, but in my own practice, it is best to charge this "natural activation" method from the outset with a standard approach. For lithium Battery "activation" problem, a lot of saying is: Charging time must be more than 12 hours, repeated three times, in order to activate the battery. This "first three charges to charge more than 12 hours", is clearly from the nickel batteries (such as Ni-Cd and Ni-MH) Continuation of the argument. So it can be said that the first is misinformation. The charging and discharging characteristics of lithium batteries and nickel batteries are very different, and it can be very clear that all of the serious formal technical data I have consulted emphasize that overcharge and overdischarge can cause great damage to lithium batteries, especially liquid lithium-ion batteries.　　It is therefore best to charge in accordance with standard time and standard methods, especially for more than 12 hours of extra-long charging. In addition, the lithium battery or charger will automatically stop charging when the battery is full, and there is no nickel-electric charger called a "trickle" charge that lasts 10 hours. In other words, if your lithium battery is filled, it is also white-charged on the charger. And none of us can guarantee that the battery's charge and discharge protection circuit's characteristics never change and the quality is foolproof, so your battery will remain on the brink of danger for a long time.　　This is another reason why we oppose long-charge. In addition, on some machines, charging more than a certain amount of time, if not to remove the charger, then the system not only stop charging, will also start the discharge-charge cycle. It may be that the manufacturer has its own purpose, but it is clearly detrimental to the life of the battery. At the same time, long charging takes a long time, often need to be carried out at night, and in the case of China's power grid, many places at night voltage is relatively high, and fluctuations. 　　As has been said before, lithium battery is very delicate, it is more than the nickel electricity in charge and discharge of the ability to withstand fluctuations in a much worse, so this brings additional danger. In addition, the other aspect that can not be neglected is that lithium batteries are also not suitable for over-discharge, and the over-discharge is also disadvantageous for lithium batteries. 　　This leads to the following question. 2, when the normal use should start charging because the number of charge and discharge is limited, so the lithium battery should be used as much as possible to charge the electricity. But I found a test sheet on the charging and discharging cycle of lithium-ion batteries, the data on cycle life are listed as follows: Cycle Life (10%dod): >1000 cycle Life (100%dod):; 200 times one of the DoD is the English abbreviation for the depth of discharge. Can be seen from the table, the number of charges and the depth of discharge, 10%dod cycle life is much longer than 100%dod. Of course, if the equivalent of the actual charge of the total capacity: 10%*1000=100,100%*200=200, the latter's full charge or discharge is better, but the previous Netizen's statement to do some correction: Under normal circumstances, you should have a reservation according to the battery remaining charge after the principle of recharging, 　　But if your battery is unlikely to persist throughout the day on the 2nd day, you should start charging in time, of course, if you are willing to carry a charger to the office and conceivable.　　And you need to recharge your batteries to cope with the important events that are expected to lead to a busy communication, even if there is still a lot of power remaining on the battery, then you have to recharge early, because you do not really lose the "1" charge cycle life, that is, "0.x" times, and often this x will be very small. The principle of recharging the battery remaining charge is not to go to extremes. As long as the charge of a wide spread of the saying that "try to put the battery of the machine to run out, the best use of automatic shutdown." This is actually a nickel battery practice, the purpose is to avoid the memory effect, unfortunately it is also circulating on the lithium battery today. Once someone has been using the auto power off example because of a warning that the machine battery is too low, still not charging. As a result, the machines in this example did not respond to the subsequent charging and booting, and had to be serviced by a drop-off service.　　This is because the battery due to excessive discharge caused by the voltage is too low, so that there is no normal charging and boot conditions caused. 3, the correct practice of lithium batteries to boil down, on the use of lithium batteries in the charge and discharge problem is the most important tip is: 1, according to the standard time and procedures to charge, even the first three times to do so; 2, when the machine is low, should try to start charging in a timely manner; 3. The lithium battery will naturally activate during normal use of the machine. 　　If you are determined to use the "first three 12-hour long charge activation" method, it will not actually be effective. Therefore, all the pursuit of 12 hours of ultra-long charging and the use of lithium battery automatic shutdown is wrong.　　If you have done the wrong thing before, please correct it in time, it may not be too late. 4, the use of lithium battery attention to fire there are many people may be from the mobile phone only to become familiar with lithium battery. In fact, it is used in many home appliances. There is no doubt that the advantages of high efficiency, light weight and so on lithium battery are making it spread rapidly. 　　But, do you know that if you use it accidentally, it will also make you angry? Lithium battery has the advantages of light weight, high efficiency and low temperature resistance ( -40℃), 0. 3mm thick, stamp-sized lithium battery can be used continuously for more than 5 years, in recent years is phasing out the existing alkaline dry battery and manganeseBattery, widely used in many high-end appliances and mobile phones. Lithium-ion batteries are different from the existing manganese batteries and alkaline dry cell zinc chloride and potassium hydroxide solution electrolyte, which uses organic solvents. The cathode of lithium battery is made of manganese dioxide, lead fluoride, sulfur chloride and other materials.　　The cathode uses the lithium metal foil compared with the general battery negative zinc chloride, the ionization tendency is strong, the positive and negative polarity voltage difference is big, thus enhances the lithium battery the work efficiency. However, lithium batteries in the use of the process will often appear fever, burning phenomenon, light impact on the host use, heavy will also burn the host caused by fire.　　It is reported that in recent years, Japan has a number of causes of lithium battery heat burning caused by family fire accident. So why does lithium battery heat and burn? The original lithium battery of many materials in contact with the water, can be violent reaction and release a lot of heat caused by heat, burning phenomenon. Lithium manganese dioxide cathode, only a small drop of water will be able to appear fever phenomenon. In lithium-ion battery, the sulfur chloride in contact with water, in the generation of hydrochloric acid and sulfur dioxide while releasing heat, several factors make lithium battery life "spark", so people in the use of lithium batteries must pay attention to waterproof, anti-humid. After all kinds of hosts are deactivated, lithium batteries should be removed and stored in a dry and low temperature place to prevent and avoid the occurrence of family fire accidents caused by improper use of lithium batteries.

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Lithium Polymer battery Use method polymer lithium battery charging precautions