About the lithium battery error introduced in everyday use

Source: 2020 - 04 - 15 they which hits: errors in the first lithium battery in daily use for li-ion batteries' activate 'problem, there are a lot of argument is: charging time must be more than 12 hours, repeated three times to activate the battery. 'the first three time charge 12 hours' is the obvious continuity of nickel battery, such as nickel cadmium and nickel metal hydride. So this is a kind of misinformation. After sampling, it can be seen that a considerable number of people confuse the two types of batteries. Lithium-ion and nickel batteries charging and discharging characteristics are quite different, all serious formal technical data to emphasize a charge discharge to the lithium battery, especially liquid lithium ion battery caused great damage. Accordingly, when charging the best according to the charging standard time and standard methods, especially the long charging time not more than 12 hours, know please specify please click right charging methods: cell phone lithium battery charging time to answer the question in general, is introduced in the instructions for mobile phone charging mode is suitable for mobile phone standard charging mode. In addition, with the lithium ion battery cell phone or charger will automatically stop after a full charge, rather like nickel battery charger for charging ten hours. That is to say, if your lithium battery has been charged, just leave it in the charger on the blank. No one can guarantee not the characteristics of the battery charge and discharge protection circuit, ensure the quality. So your battery for a long time all on edge. This is another reason we against charging for a long time. Lithium ion battery charge and discharge cycle experiment data cycle life table is as follows: cycle life, 10% DOD) : > 1000 circulation cycle life ( 100% DOD) : > 200 times the DOD is the abbreviation of the depth of discharge. As can be seen from the table, the number of charge and discharge depth, 10% DOD cycle of more than 100% DOD long service life. Of course, if the actual charge relative to the total capacity: 100100% * 1000 = 10% * 200 = 200, after a full charge and discharge or better. And the life of the lithium battery mainly reflected on the charging and discharging cycle, this is an absolute concept. Last time with 30% of the battery, full of electricity, the next with 70% of the electricity, full of electricity, which is a charging cycle. So it still follows the lithium battery inventor slogan 'charging, charging, play' methods to use lithium-ion batteries. Supernormal charging time and completely empty cells may lead to excessive charging and discharging, electrode in lithium ion battery permanent damage, from the molecular level, discharge can cause excessive release of lithium ion cathode carbon layer structure collapse, excessive charging will take too much lithium ion shoehorned into the structure of cathode carbon, and makes some lithium ion can no longer be released. This is why the lithium ion battery is often equipped with the cause of the charge and discharge control circuit. Lithium ion batteries usually comes with a management chip and a charging control chip. The management chip has a series of register, storage capacity, temperature, ID, such as charging status, discharge times value. These values in use change gradually. 'once a month or so to charge and discharge in the instructions for the main function is to correct the incorrect values in these registers, and make a battery charging control and match the actual situation of nominal capacity and the battery. Battery statistics chips by recording discharge curve ( Voltage, current, time) To sampling calculation of battery power, that is, wh. We read the battery information. But after repeated use lithium ion batteries, the discharge curve will change. If chips are no chance to read the complete discharge curve, calculated the power will be inaccurate. So we need a depth charge to calibrate the battery chip.