How to use nickel battery correctly, how to use cadmium nickel battery correctly?

Although lithium batteries are widely used, they are used in automobiles, electric vehicles, mobile phones, tablets, notebooks, etc. In the near future, there may be more devices to use it, but for now, mobile phones and tablets the equipment of the class is still the lithium battery power supply device closest to us. Therefore, it is necessary to make special instructions for the lithium battery of the mobile phone.

1, charging

In the use of lithium batteries, it should be noted that after the battery is placed for a period of time, it enters a sleep state. At this time, the capacity is lower than the normal value, and the use time is also shortened. However, the lithium battery is easy to activate, and the battery can be activated to restore normal capacity after 3 to 5 normal charge and discharge cycles. Due to the characteristics of the lithium battery itself, it has almost no memory effect, so 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" problem of lithium batteries, many claims are: charging time must be more than 12 hours, repeated three times in order to activate the battery. This statement that "the first three charges have to be charged for more than 12 hours" is obviously a continuation of the nickel battery (such as nickel cadmium and nickel hydride) so this statement can be said to be misinformation at the beginning. The charge and discharge characteristics of lithium and nickel batteries are very different, and it is very clear to tell you that all the serious formal technical information I have reviewed emphasizes that overcharge and overdischarge will be a lithium battery, especially liquid lithium. Ion batteries cause great damage. Therefore, charging is preferably performed in accordance with standard time and standard methods, especially for ultra-long charging of more than 12 hours. Usually, the charging method described in the mobile phone manual is a standard charging method suitable for the mobile phone.

In addition, the lithium battery's mobile phone or charger will automatically stop charging after the battery is fully charged. There is no so-called "turbulent" charging that the nickel battery charger has for 10 hours. In other words, if your lithium battery is full, it will be a white charger on the charger. And none of us can guarantee that the characteristics of the battery's charge and discharge protection circuit will never change and the quality will be foolproof so your battery will be on the edge of danger for a long time. This is another reason why we oppose long charging. In addition, on some mobile phones, after charging for more than a certain period of time, if you do not remove the charger, then the system will not stop charging and will start to discharge and charge cycle. Perhaps the manufacturer of this approach has its own purpose, but it is clearly unfavorable for the life of the battery and the phone/charger. At the same time, long charging takes a long time and often needs to be carried out at night. In the case of China's power grid, the voltage at night is high in many places and fluctuates greatly. As mentioned above, the lithium battery is very delicate, it is much less resistant to fluctuations in charge and discharge than nickel, and this brings additional danger. In addition, another aspect that cannot be ignored is that lithium batteries are also unsuitable for overdischarge and overdischarge, which is also disadvantageous for lithium batteries. This leads to the following problem.

2, When should I start charging during normal use?

In the forum, you can often see this statement, because the number of charge and discharge is limited, so the battery power of the mobile phone should be recharged as much as possible. But find an experimental table on the charge and discharge cycle of lithium-ion batteries. The data on cycle life are listed below:

Cycle life (10% dod): > 1000 times

Cycle life (100% dod): > 200 times

The Ministry of Defense is the English abbreviation for the depth of discharge. As can be seen from the table, it can be seen from the table that the number of rechargeable times is related to the discharge depth. The cycle life at 10% DOD is much longer than that of 100% DOD. Of course, if the relative total capacity is reduced to the actual charge: 10% * 1000 = 100100% * 200 = 200, the latter's full charge and discharge is still better. Under normal circumstances, you should reserve the battery according to the principle that the remaining battery power is used up and recharge. However, if the battery is not expected to last for the whole day on the second day, you should start charging in time. It’s a different matter to get the charger to the office. And when you need to charge to cope with the expected important events that will cause the communication to be busy, even if the battery still has a lot of power, then you only charge in advance because you have not really lost the "1" charge cycle life. It is "0 times", and often this x will be small. The principle that the remaining battery power is used up and refilled is not to go to extremes. One of the more widely spread sayings like long charging is that "try to use up the battery power of the mobile phone, it is best to use automatic shutdown." This practice is actually only a nickel battery, the purpose is to avoid memory effects, unfortunately, it is also circulating on lithium batteries. Some people have used the example of automatic shutdown since they have been warning that the mobile phone battery is too low. As a result, the mobile phone in this example did not respond during the subsequent charging and booting and had to be sent to the customer service for repair. This is actually caused by the battery being over-discharged and the voltage is too low so that it does not have normal charging and power-on conditions.

3, important tips for the correct use of lithium battery phones

To sum up, my most important tips on the charging and discharging problems of lithium battery mobile phones in use are:

1, charging according to standard time and procedures, even the first three times;

2, when the mobile phone low battery prompts, you should start charging as soon as possible;

3, lithium battery activation does not require a special method, the lithium battery will naturally activate during normal use of the phone. If you insist on using the "first three 12-hour long charge activation" method, it will not actually work. Therefore, all the pursuit of 12 hours of ultra-long charging and the use of lithium battery mobile phones for automatic shutdown are errors. If you have done it in the wrong way, please correct it in time, maybe it is not too late. Of course, in the case of good quality of the protection and control circuit of the mobile phone and the charger itself, the protection of the lithium battery is quite guaranteed, so the understanding of the charging rule is the focus, and in some cases, it can also be made. Concession. For example, if you find that your phone 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.

Second, battery maintenance

In fact, there is not much use in the battery to pay attention to, in other words, it is not too much to consider. How many times a battery can be used, the difference is more from the individual differences in the manufacture of the battery itself, rather than the method of use. In addition to its own battery quality, the life of the battery itself is limited. Once the battery is off the production line, its life begins to pass. Lithium batteries last for only two to three years, whether you use them or not. One of the important reasons for the drop in battery capacity is due to the increase in internal resistance caused by oxidation. Finally, the resistance of the cell will reach a certain point. Although the battery is fully charged, the battery cannot release the stored amount. Many friends think that the first use of lithium batteries should be charged for more than 16 hours so that the battery can be fully activated. In fact, this is not based on this. This is just the charging method of nickel-hydrogen or nickel-cadmium batteries that were popular in the past. For lithium-ion batteries. Not applicable. Because this lithium polymer-based battery has no memory effect in theory, even if it is, it is completely negligible, so it only takes about 3 hours to complete, if the display charging is completed, and temporarily You don't need an external power supply, you can unplug the power and you don't have to wait for such a long time.

Myth 1: The PSP needs to be charged and discharged three times in order to activate the battery. Unless the PSP is a product that has been in stock for more than one year, you don't need to do this because the battery cells are now activated at the factory, and the battery is equivalent to activation when packaged into a PSP battery. The test, so the battery you got the hand, has already been activated, and then do three charges and discharge process is just a need to increase the loss of the battery.

Myth 2: The first charge must be charged for 12 hours. This is suitable for early NiMH battery devices without battery control circuits, but it is a joke for PSPs with intelligent charge and discharge control modules. When the PSP battery is fully charged, the charging current is automatically cut off and The system displays as “External Power”. Even if you continue to charge for 120 hours, the state will not change. In general, 3 hours is completely full. The remaining "charging" is just a waste of your time. Instead, you should first get a new machine. Light up and recharge the battery.

Myth 3: The battery needs to be fully charged and discharged once a month. For nickel-hydrogen batteries with strong memory effects, this is a must, but for lithium batteries, this cycle is too frequent. Lithium batteries theoretically eliminate memory effects, and even if they do, they have greatly reduced negligibly To the extent that you use the battery very often, then you should discharge the battery to a lower (about 10 ~ 15%) recharged power, but if the discharge does not even open the machine (0 ~ 1%), it is right Lithium batteries have deep damage with large damage. Generally, this operation can be done every 2 months. If you rarely use the battery, you only need to do this every 3 months.

Myth 4: Working while charging, or continuing to use external power after charging will damage the main unit and battery. This is the most ridiculous argument. The so-called theory of the so-called hole electrons, sub-charged and other theoretical aspects, how much reaction can be obtained in practice? The battery industry academic community, first of all, is not uniform. The theory still has differences. How to guide consumers to use the actual battery? The loss of the battery is divided into normal loss and damage loss. The actual power consumption and the degree of loss caused by the use of the external power supply are completely within the normal loss range of the battery. That is to say, no matter how systematic the theoretical maintenance measures, the battery will be aging, which is like how magical cosmetics and maintenance cannot prevent the beauty from becoming an old woman, at most only delay, but the surface of the whitewash How much real utility can be, this is by no means a theory can explain - respect for the actual use of experience is the correct and scientific view of knowledge. Some people may say that the only way to avoid battery aging is not to use it (so many people choose to take the battery down), but this makes the PSP portability meaningless. Second, the battery is over time even in the sealed state. Extended and natural aging. The battery is actually a semi-consumable product. As long as the battery brings you enough convenience and happiness, I think their sacrifice is valuable.

The page contains the contents of the machine translation.