New batteries need to be repeated several times to fully charge and discharge to activate it?
There are indeed some rechargeable batteries that require similar “activation” work when charge battery.
This is the earlier Ni-Cd rechargeable battery and Ni-MH rechargeable battery. These batteries produce a phenomenon called “memory“, which is charged in an incompletely discharged state, which tends to overcharge the battery. Over time, it will cause proliferating crystals on the electrode plate and block the contact between the electrolyte and the electrode plate. As a result, the voltage of the battery drops, allowing the user to feel that the battery is quickly used up. Therefore, for these two types of batteries, recharging after fully discharging the battery periodically (not every time) can alleviate the voltage drop caused by the above reasons.
However, the batteries used in our mobile phones and laptops now are mostly Li-ion batteries. Lithium-ion batteries, although small in size, can store large amounts of energy. Therefore it is widely used. Lithium-ion batteries do not need to be activated by deep charge and discharge when they are used, because the battery initialization and testing process is already done when the battery is manufactured. Lithium-ion batteries also have no so-called “memory” and can be charged at any time.. Lithium-ion batteries do not need to be activated by deep charge and discharge when they are used, because the battery initialization and testing process is already done when the battery is manufactured. Lithium-ion batteries also have no so-called “memory” and can be charged at any time.
Overcharging when charge battery can cause the battery to explode？
Lithium-ion batteries have high energy density and high voltage (the voltage generated by a single lithium-ion battery unit can reach 4.2V, while the ordinary nickel-based rechargeable battery is 1.2V). Compared with low-voltage batteries, the redox reaction of the electrodes during charging of lithium-ion batteries is very severe, so the conditions of use of lithium-ion batteries must be strictly limited. Overcharging, over-discharging, short-circuiting, high temperatures, etc. can cause damage to the battery and even fire and explosion.
However, in actual use, a lithium-ion battery packs several cells together with a set of safety protection circuits and various safety devices into one battery board. These safety features ensure that the battery’s circuitry is automatically shut off during overcharging, overdischarging, and short circuits. Excessive internal pressure of the battery will also trigger the decompression of the exhaust device; if the battery temperature is too high, the hot melt protection device will be triggered to block the movement of lithium ions and stop the electrochemical reaction of the battery.
Therefore, as long as you are not using the quality of the cottage battery, the battery is fully charged and the power is not removed in time will not cause the battery to explode.