The correct Lithium Battery Activation and Charging Methods

For the "activation" of lithium batteries, there are many arguments: The charging time must be more than 12 hours, repeated three times to activate the battery. This "the first three charges should be charged for more than 12 hours" is obviously a continuation of nickel batteries(such as nickel cadmium and nickel hydrogen). So this statement can be said to be misrepresented at the beginning. The charge-discharge characteristics of lithium batteries and nickel batteries are very different, and it can be very clear to everyone. All the serious formal technical information I have consulted emphasizes that overcharge and over discharge can cause great damage to lithium batteries, especially liquid lithium-ion batteries. Therefore, charging is best done in accordance with standard time and standard methods, especially without overcharging for more than 12 hours. In general, using the charging method described in the manual is a standard charging method.

At the same time, long charging takes a long time and often needs to be carried out at night. According to the situation of China's power grid, the voltage at night is relatively high and fluctuating in many places. As has been said before, lithium batteries are very delicate, and they are much less resistant to fluctuations in charge and discharge than nickel, and 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 unfavorable to lithium batteries.

Tools / raw materials

Lithium battery, nickel-metal hydride battery, lithium battery charger, nickel-metal hydride battery charger

Steps / Methods

When should the charge start in normal use?

This statement can often be seen on the forum, because the number of charges and discharges is limited, so the battery's electricity should be recharged as much as possible. But I found an experimental table on the charge and discharge cycle of lithium-ion batteries. The data on the cycle life are listed below:

Cycle life(10 % DOD): & GT; 1,000 times.

Cycle life(100 % DOD): & GT; 200 times

The 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 cycle life of 10 % of the DOD is much longer than that of 100 % of the DOD. Of course, if the relative total capacity of the actual charging is: 10 % * 1000 = 100, 100 % * 200 = 200, the latter's full charge discharge is still better, but the previous Netizen's statement needs to make some corrections: Under normal circumstances, You should recharge your battery on a reserved basis, but if your battery doesn't last two hours on the next day, you should start charging in time. Of course, if you're willing to go to the office with a charger on your back.

When you need to recharge to cope with an anticipated inconvenience or condition that does not allow charging, even if the battery has a lot of power, then you only need to charge in advance because you do not really lose "1" charge cycle life. That is, "0.x" times, and often this X will be small.

The principle of recharging the battery after it's used up is not to go to extremes. A saying that is as widespread as long charging is that "try to use up the battery's power, and it is best to use automatic shutdown." This practice is actually just a nickel battery practice. The purpose is to avoid the memory effect. Unfortunately, it is also circulating on lithium batteries. Because the battery is too low due to excessive discharge, the voltage is so low that it does not have normal charging and boot conditions.

The Right Approach to lithium batteries

To sum up, my most important reminder of the charge and discharge problem of lithium batteries in use is:

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

2, when the electricity appears too low, should start charging as soon as possible;

3, the activation of lithium batteries does not require a special method, in normal use of lithium batteries will naturally activate. If you insist on using the popular "first three 12-hour long charging activation" method, it will not actually work.

Therefore, all the pursuit of 12 to 16 hours of ultra-long charging and the use of lithium batteries to automatic shutdown is wrong. If you have done it wrong before, please correct it in time, perhaps it is not too late.

matters needing attention

Under the condition that the original charger protects itself and controls the quality of the circuit, the protection of the lithium battery is still quite guaranteed. Therefore, the understanding of charging rules is the focus, and in some cases it is possible to make some concessions. For example, if you think the battery must be charged before you go to bed at night, you can also start charging before bedtime. The point is that you should know what is right and don't try to follow the wrong line.

In theory, using 500mA to discharge a 1000mAh lithium battery should be discharged in 2 hours.

However, if the battery is charged with 500mA, it will be full for 2 hours. Because the lithium battery charger has a constant current and constant pressure phase, the charger will be 500mA after entering the constant pressure phase. So it could be 2.5-3 hours.

Theoretically, it's two hours, but you have energy loss, so it's not always two hours if you're charging for less than two hours. It starts with constant current charging, and then it's constant pressure charging. The time will be 2-3 hours.

The page contains the contents of the machine translation.