What should we pay attention to when using lithium ion batteries?
22 May 2021 - lithium ion batteries
The use of lithium-ion batteries should pay attention to the following three points
1. how to charge the new battery in the use of lithium ion batteries should be noted that the battery is placed for a period of time after the dormant state, the capacity is lower than the normal value, the use of time is shortened.But lithium-ion batteries are easy to activate, and it only takes 35 normal charge-discharge cycles to activate the battery and restore its normal capacity.Lithium-ion batteries have almost no memory effect due to their own characteristics.Therefore, users do not need special methods and devices in the activation process of new lithium ion batteries.Not only in theory, but in my own practice, it's best to charge from the beginning using the standard method of natural activation.As for the activation of lithium-ion batteries, many say that the 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, obviously from the nickel battery (such as nickel cadmium and nickel hydride) continued to say.So it was a misrepresentation to begin with.Lithium ion battery and nickel battery charge and discharge characteristics are very different, and can be very clear to tell you, I have consulted all the serious formal technical data have emphasized that the charge and discharge will cause great damage to lithium ion battery, especially liquid lithium ion battery.Therefore, it is best to charge in accordance with the standard time and standard method of charging, especially do not carry out more than 12 hours of super-long charging.In addition, lithium-ion batteries or chargers will automatically stop charging when the battery is fully charged, and there is no such thing as a continuous trickle of charging for more than 10 hours as nickel chargers claim.In other words, if your lithium-ion battery is fully charged, it will be charged for nothing in 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 is safe, so your battery will be in the dangerous edge of wandering for a long time.This is another argument against long charging.In addition, on some machines, after charging for more than a certain time, if you do not take off the charger, then the system does not only stop charging, but also will start the discharge-charge cycle.Maybe the manufacturers have their own motives, but it's obviously bad for battery life.At the same time, long charging takes a long time, usually at night, and according to the situation of China's power grid, the voltage at night in many places is relatively high, and the fluctuation is large.Having said that, lithium-ion batteries are delicate, and are much less resistant to fluctuations in charge and discharge than nickel batteries, which brings additional dangers.In addition, another aspect that can not be ignored is that the lithium ion battery is also not suitable for overdischarge, overdischarge is also very unfavorable to the lithium ion battery.This leads to the following question.
2. When should you start charging in normal use? Because The Times of charging and discharging are limited, lithium ion batteries should be recharged with as much power as possible.However, I found an experimental table about the charge-discharge cycle of lithium-ion battery, and the data about the cycle life is listed as follows: cycle life (10%DOD):1000 cycles (100%DOD):200 cycles, where DOD is the abbreviation of the discharge depth.As can be seen from the table, the charging times are related to the discharge depth, and the cycle life of 10%DOD is much longer than that of 100%DOD.Of course, if the relative total capacity to the actual charge: 10%*1000= 100,100 %*200=200, the latter of the complete charge and discharge is still better, but in front of the netizens that view to do some corrections:Under normal circumstances, you should be reserved and use up the remaining battery charge principle, but if your battery is not expected to last the whole day in the second day, you should start charging in time, of course, if you are willing to carry the charger to the office is another matter.And when you need to charge for an important event that is expected to cause heavy traffic, even if the battery still has a lot of power left, then you just charge ahead of time, because you're not really losing 1 charge cycle life, which is 0. X times, and often the X is small.The rule of recharging your battery when it's empty isn't to go to extremes.And long charge the same widespread one
If the battery has a lot of extra charge left, then you just charge ahead of time, because you're not really losing 1 charge cycle life, which is 0. X cycles, and often the X is small.The rule of recharging your battery when it's empty isn't to go to extremes.As with long charging, a popular saying is to try to use up the battery of the machine, the best use of automatic shutdown.This was done on nickel batteries to prevent memory effects, but unfortunately it is also used in lithium-ion batteries.After the warning of low battery power of the machine appeared, some people still did not charge and continued to use the machine until the example of automatic shutdown.As a result, the machine in this example did not respond during the later charging and starting, and had to be sent to customer service for maintenance.This is actually due to the battery due to excessive discharge of the voltage is too low, so that the normal charging and boot conditions caused.
3. the correct approach to lithium-ion battery summed up, the lithium-ion battery in use of the charge and discharge problem of the most important tips are:
1, in accordance with the standard time and program charging, even if it is the first three times also want to do so;
2, when the machine is too low power prompt, should try to start charging in time;
3. There is no special method to activate the lithium ion battery. The lithium ion battery will be activated naturally during the normal use of the machine.If you insist on using the first three 12-hour long charge activation methods that have been circulated, it won't actually work.Therefore, all the pursuit of a super-long 12-hour charge and the use of lithium-ion batteries for automatic shutdown is a mistake.If you have acted on an incorrect statement before, please correct it in time. It may not be too late.