Experts Teach You The Correct Use Of Lithium-ion Batteries
March 19, 2020
Experts teach you the correct use of lithium-ion batteries
This article focuses on mobile phone batteries, but most digital cameras now use lithium-ion batteries, which are the same as mobile phone batteries.
Do the batteries need to be activated?
The answer is that the battery has to be activated, but this is not something the user has to do. The lithium-ion battery goes through the following process before leaving the factory:
Lithium-ion battery case is filled with electrolyte --- sealing-formation, that is, constant-voltage charging, and then discharging, so that several cycles are performed, so that the electrode is fully saturated with the electrolyte, fully activated, until the capacity reaches the required, this is activation Process --- Divide the capacity, that is, test the capacity of the battery, select batteries with different performance (capacity) to classify, divide the grade of the battery, and perform capacity matching. The lithium-ion battery thus produced is already activated in the user's hands. The nickel-cadmium batteries and nickel-metal hydride batteries that are commonly used by everyone are also converted to the factory before activation. The activation process of some batteries requires the battery to be in an open state, and then sealed after activation. This process may only be completed by the cell manufacturer.
There is a problem here: the battery delivered by the battery factory is in the hands of the user. This time can be very long, as short as 1 month and as long as half a year. At this time, because the battery electrode material will be passivated, the manufacturer recommends the first use. The battery is best to be fully charged and discharged 3 to 5 times in order to eliminate the passivation of the electrode material and achieve the maximum capacity.
In the three national standards for nickel-metal hydride, nickel-cadmium, and lithium-ion batteries issued in 2001, the initial capacity testing has clearly stipulated that the battery can be deep-charged and deep-charged 5 times. To stop.
It is then possible to call it "second activation". The "new" battery used by the user for the first time should be cycled as many times as possible.
However, after testing (for lithium-ion batteries), lithium-ion batteries with a storage period of 1 to 3 months are subjected to deep charge and deep-cycle treatment, and the capacity increase phenomenon is almost non-existent.