Jan 11, 2019 Pageview:839
Lithium battery over-discharge protection, using a constant current and constant voltage source to directly charge the battery core (the lithium battery has a lithium battery after removing the protection board); if you do not open the battery, try to tear a piece on the label paper Small mouth, after tearing open, it should be an aluminum shell outer packaging. Use the black meter pen of the constant current source to face the negative input end of the protection board. The red meter pen is charged to the aluminum shell. The voltage can be stopped above 3.0V. The protective effect of the protective plate of the lithium battery is naturally canceled; the bare aluminum case is wrapped with tape; then the battery can be charged directly with the charger, and the battery is not charged, if any, the battery still cannot If you use the above method or do not charge, then you have to take the battery apart and charge the positive and negative poles of the battery directly. My original NOKIA3310 battery is the problem.
It is good to charge continuously for more than 12 hours. It is the electrolyte inside which has been solidified for too long. It is safe, as long as the lithium battery does not rise and does not break. In principle, it is no problem to rush for 24 hours. After this activation, you don't have to rush for a long time. After that, you can press the instructions.
1, to activate the lithium battery can't use high voltage, because it's protective plate protection there are upper and lower voltage, high voltage will blow out the protection board MOS tube, the activation of lithium batteries need to be across the electrodes of the charger directly across the electrodes of the battery charging, when the voltage rise to logoff voltage protection plate, plate protection will be normal work, the normal charge.
2, the lithium battery refers to the electrochemical system containing lithium (including metal lithium, lithium metal and lithium ion, lithium polymer) batteries. Lithium battery can be roughly divided into two categories: battery and lithium metal Lithium ion batteries. Lithium batteries are usually not to charge, and containing lithium metal state. Lithium ion battery does not contain lithium metal state, and can be recharged.
3, Lithium battery is a primary battery using a lithium metal or a lithium alloy as a negative electrode material and a nonaqueous electrolyte solution, and a rechargeable lithium ion battery is different from a lithium ion polymer battery. The inventor of the lithium battery is Edison. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal are very demanding on the environment. Therefore, lithium batteries have not been used for a long time. With the development of microelectronics technology at the end of the twentieth century, the number of miniaturized devices has increased, and high requirements have been placed on power supplies. Lithium batteries have entered a large-scale practical stage.
4, lithium battery is a kind of lithium metal or lithium alloy anode materials for batteries, the use of water electrolyte solution. First appear in the lithium battery using the following response: Li + MnO2 = LiMnO2, the reaction for the REDOX reaction and discharge.
5, square lithium ion battery is the most common type of lithium battery, its model is very much, MP3, MP4, mobile phone, model aircraft and other products are widely used.
Lithium batteries need to be activated, but this is something the lithium battery factory has to do, not what the user has to do.
Lithium-ion batteries go through the following processes before leaving the factory:
Infusion electrolyte lithium ion battery shell - into - the seal, is constant voltage charge, and then discharge, so for several cycles, the electrode fully infiltrates the electrolyte, fully activated, in so far, capacity requirements - this is the activation process capacity, is to test the capacity of the battery to select different performance (capacity) classifies the battery, to differentiate the level of the battery, the capacity matching, etc. So the lithium ion battery to users is the activation of. All of us the same is true of the nickel cadmium battery and nickel metal hydride batteries used to activate after the factory. Some cell activation process need battery is in open state, activate again after sealing, this process also can only have batteries manufacturers to complete.
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 to 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. Therefore, the new lithium battery in the user's mobile phone does not require special methods and equipment during the activation process. Not only in theory, but from my own practice, it is best to use a standard method of charging this "natural activation" method from the beginning.
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 charging method described in the instruction manual is the standard charging method.
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 that cannot be ignored is that lithium batteries are also not suitable for over-discharge, and over-discharge is also disadvantageous for lithium batteries.
Tools/raw material
Lithium battery, nickel metal hydride batteries, lithium battery chargers, nickel metal hydride battery chargers
Steps/methods
When in normal use should start charging
On the BBS often can see this statement, because the number of charge and discharge is limited, so the battery should run 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 reserve the charge according to the principle that the remaining battery power is used up and recharge, but if your battery is not likely to last for two hours on the second day, you should start charging in time, of course you If you are willing to carry the charger to the office, it’s a different matter.
You need to charge for the expected inconvenient or conditions are not allowed to charge, 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 "try to put the power of battery run out, it is better to use automatic shutdown". This practice is actually only a nickel battery. The purpose is to avoid memory effects, unfortunately it also in lithium battery of circulating on today. Due to the battery voltage is too low, caused by the excessive discharge that do not have normal charging and boot conditions.
The correct approach for lithium batteries
Boil down to, I the most important problems of lithium battery charge and discharge in the use of tip is:
1, according to the standard time and procedure charging, even so will three times before;
2, when the 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, lithium battery activation naturally in normal use. 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 ~ 16 hours long use the lithium battery charging and the practice of automatic shutdown, are wrong. If you've made according to the error, please correct in time, maybe it is not too late.
Precautions
Under the condition that the original charger's own protection and control circuit is of good quality, the protection of the lithium battery is quite guaranteed. So the understanding of the charging rules is the focus, and in some cases it is also possible to make some concessions. For example, if you think the battery must be charged before you go to sleep at night, you can also start charging before going to bed. The point is that you should know what the right approach is and don't deliberately follow the wrong way.
Matters needing attention
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