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release time:2023-12-25 Hits: Popular:AG11 battery
The answer is that the battery needs to be activated, but this is not something the user needs to do. The author has visited the production plant of lithium-ion batteries. Before leaving the factory, lithium-ion batteries go through the following process: filling the lithium-ion battery shell with electrolyte, sealing, and forming, which is constant voltage charging, and then discharging. This process is repeated for several cycles to fully immerse the electrode in the electrolyte, fully activate it, and until the capacity meets the requirements. This is the activation process - capacity division, which tests the capacity of the battery and selects batteries with different performance (capacity) for classification, Classify the battery and perform capacity matching, etc. The resulting lithium-ion battery has already been activated by the user.
The commonly used nickel cadmium batteries and nickel hydrogen batteries are also activated in this way before leaving the factory. The activation process of some batteries requires the battery to be in an open state, and then sealed after activation. This process can only be completed by the battery cell manufacturer.
There is a problem here, which is that the time it takes for batteries from the battery factory to reach the user's hands can sometimes be very long, ranging from one month to six months. At this time, because the electrode material of the battery will become passive, the manufacturer suggests that the battery used for the first time should undergo 3-5 complete charging and discharging processes to eliminate the passivation of the electrode material and achieve maximum capacity.
In the three national standards for nickel hydrogen, nickel cadmium, and lithium-ion batteries issued in 2001, there were clear provisions for the initial capacity testing, which allowed for 5 deep charging and discharging of batteries. When one of them met the requirements, the test could be stopped. This explains the phenomenon I mentioned very well.
So it is also possible to call it "second activation", and users should try to perform several deep charging and discharging cycles on the "new" battery they are using for the first time.
However, according to the author's test (for lithium-ion batteries), for lithium-ion batteries with a storage period of 1-3 months, there is almost no increase in capacity when subjected to deep charging and discharging cycles.
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