Charging Method for Lithium Battery

Today, mobile phones use lithium-ion batteries. Therefore, there is no doubt about the memory effect of lithium-ion batteries in electric vehicles. There is no need for activation. The first charge does not require more than 12 hours like nickel electricity. It only requires about 4 hours of charge. The lifetime of ion batteries is only related to the number of charges. Lithium-ion batteries can charge about 1,000 times. The standby time is related to the operating conditions. However, the cell phone seller said that the first three charging moments had to reach 12 hours. What the hell is going on?

1, how to charge the new battery

In the use of lithium batteries, it should be noted that after the battery is placed for a period of time, it enters dormancy. At this time, the capacity is lower than normal, and the production of lithium batteries for electric vehicles is also shortened when used. However, lithium batteries are easily activated. They can be activated by only 3-5 normal charge and discharge cycles to recover normal capacity. Because of the characteristics of the lithium battery itself, it is determined that it has almost no memory effect.

Therefore, the new lithium battery in the user's mobile phone is not required in the activation process of the lithium battery manufacturers of electric vehicles special methods and equipment. Not only in theory, but in my own practice, the "natural activation" of charging from the very beginning is the best.

For the "activation" of lithium batteries, many say that the charging time must exceed 12 hours and repeat it three times in order to activate the battery. This "the first three charges should be charged for more than 12 hours", notably from the nickel battery(such as nickel cadmium and nickel hydrogen) continuous statement. Therefore, this statement can be said to be misleading. The charge-discharge characteristics of lithium batteries and nickel batteries are very different, and they can clearly inform everyone. All the hard official technical data I 've looked at emphasize that overcharge and over-discharge can cause endless damage to lithium batteries, especially liquid lithium batteries. Therefore, charging is best in accordance with the standard time and standard method of charging, especially not to carry out over 12 hours of super long charging. In general, the charging method described in the mobile phone statement is a standard charging method suitable for the mobile phone.

In addition, lithium cell phones or chargers will automatically stop charging after the battery is filled, and there is no so-called "trickle-down" charging of nickel-electric chargers that lasts for more than 10 hours. In other words, if your lithium battery is filled, it is also a white charge on the charger. Neither of us can ensure that the characteristics of the battery's charging and discharging maintenance circuit will never change and the quality is full of certainty, so your battery will be on the edge of risk for a long time. That's another reason why we have to keep charging each other.

In addition, on some mobile phones, after charging beyond the inevitable moment, if the charger is not removed, the system will not only stop charging, but will also start the discharges and charges cycle. This may have its own intent, but it is obviously unlucky for the longevity of batteries and cell-phones / chargers. Together, long charging requirements are often required at night. According to the situation of the Chinese power grid, the voltage at night is relatively high and shaken in many places. As has already been said, lithium-ion batteries are very delicate, and they are much worse than nickel's ability to withstand fluctuations in charge and discharge, so this poses additional risks.

In addition, another aspect that can not be ignored is that lithium batteries are also not suitable for over-discharge, and over-discharge is also very bad for lithium batteries. This leads to the following questions.

2, when should the start of charging in normal use

This is often seen in our forum, because the number of charge and discharge is limited, so cell phone batteries should be recharged as much as possible. However, I found a test table for the lithium-ion battery charging and discharging cycle. The data for the cycle life number are listed below:

Cycle life(10 <UNK> DOD): & GT; 1,000 times.

Cycle life(100 <UNK> DOD): & GT; 200 times

During this period, DOD is an English abbreviation for discharge depth. From the table, it can be seen that the number of rechargeable times is related to the discharge depth, and the number of cycles at 10 <UNK> DOD is much longer than that of 100 <UNK> DOD. Of course, if the relative total capacity equivalent to practical charging is: 10 <UNK> * 1000 = 100, 100 <UNK> * 200 = 200, the latter's complete charging and discharging is still better, but the previous Netizen's statement needs to make some corrections: Under normal conditions, You should be recharged on a reserved basis according to the principle that the battery will run out of power, but if your battery is unable to hold on to the whole day on the second day, it should start charging in time. Of course, if you 'd rather go to the office with a charger on your back.

And when you need to recharge to estimate the important things that are going to make communication busy, even when the battery has a lot of power, then you just charge early because you don't really lose "1" charge cycle life. That is, "0.x" times, and usually this X will be small.

The principle of recharging the rest of the battery is not to go to the pole. A saying that is widely broadcast like a long charge is "to use up the battery of the mobile phone as much as possible, and use it to shut down automatically." This approach was originally only on nickel batteries. The intention was to prevent the memory effect. Unfortunately, it also spread on lithium batteries. Some people used to use automatic shutdown for example because of the low battery power of the mobile phone. The results of this case, such as the mobile phone in the later charging and boot did not respond, had to send customer service maintenance. This is originally because the battery is too low due to excessive discharge, so that it does not have normal charging and boot conditions.

3, the accurate practice of lithium battery mobile phone

To sum up, the most important reminder of my questions about the use of lithium battery phones is:

1, according to the standard moment and program charging, even if it is the first three times to do so;

2, when presenting the low power of the mobile phone, should start charging as soon as possible;

3,Lithium battery activation does not require extra methods. Lithium batteries will be naturally activated in the normal use of mobile phones. If you insist on using the "first three 12-hour long charging activation" method, it will not work in practice.

It is therefore a mistake to seek 12 hours of extra charge and to turn off the lithium battery phone automatically. If you have done it in accordance with the wrong statement, please correct it in time, perhaps it is not too late.

Of course, in the mobile phone and charger itself to maintain and control the quality of the circuit, the maintenance of lithium batteries is still appropriate to ensure. Therefore, understanding the charging rules is the main point, and in some situations it is possible to make some concessions. For example, if you find it necessary to charge your phone before you go to bed at night, you can also start charging before bedtime. The key to the question is that you should know exactly what to do and don't deliberately follow the wrong line.

The page contains the contents of the machine translation.