Most complete knowledge of lithium battery charging

In order to have a more comprehensive understanding of the use of lithium battery, Shenzhen Shanmu new energy for you to introduce the charging knowledge of lithium battery general mobile phone battery voltage writing is written 3.7V, but the general charger voltage is written 5V, but will not affect the use, because there is a charging management chip inside the phone responsible for the constant current charging.

The number 5 cylindrical lithium battery, namely the 14500 battery.Through the technology of lithium battery voltage regulator, the battery voltage is adjusted to a 3.0V voltage suitable for small electrical appliances.

For the "activation" problem of the new lithium-ion battery, many theories are that the charging time must be more than 12 hours, and repeated three times to activate the battery.This "the first three charges of more than 12 hours", obviously from nickel batteries (such as nickel-cadmium and nickel-metal hydride).So this statement, it can be said that at the beginning is a mistransmission.The charge and discharge characteristics between lithium batteries and nickel batteries are very different, and it can be very clearly told that all serious formal technical data emphasize that overcharge and overdischarge will cause huge damage to lithium batteries, especially liquid lithium-ion batteries.Therefore, it is best to charge in accordance with the standard time and standard methods, especially not for more than 12 hours of super long charging.

So does the battery need to be activated?The answer is yes, you need to activate it!However, this process is done by the manufacturer, unrelated to the user, and the user has no ability to complete it.Lithium battery real activation process is such: lithium ion battery shell infusion electrolyte-sealing-into, is constant pressure charging, and then discharge, so several cycles, make the electrode fully infiltration electrolyte activation, until the capacity, this is the activation process-capacity, that is to say after factory lithium ion battery to the user has been activated.In addition, some of the batteries require the battery to be in an open state and then seal the opening. Unless you have the cell production equipment, how to complete the equipment?

But why do some product instructions say that users should fully charge and discharge the phone for the first three times?Is this not the activation?In fact, the fact is that in the battery factory, then sold, and then to the hands of the user, will experience a period of time, a month or several months, so that the electrode material of the battery will be "passivation", when the capacity is below the normal value, the use time will be shortened.But lithium batteries are easy to activate, as long as 3-5 normal charge and discharge cycles can activate the battery, return to normal capacity.Due to the characteristics of the lithium battery itself, it has almost no memory effect.Therefore, the user's new lithium battery in the activation process, it does not need special methods and equipment.

Long charge deep charge

Long charging may lead to overcharging.Lithium batteries or chargers automatically stop charging when the battery is full, and there is no so-called "trickle" charging that lasts for more than 10 hours.In other words, if your lithium battery is full, it is also white on the charger.None of us can guarantee that the characteristics of the battery charge and discharge protection circuit will never change and the quality is safe, so your battery will be on the edge of danger for a long time.This is also another reason for us to argue against long charging.

On some machines, after charging for more than a certain amount of time, if the charger is not removed, the system will not only do not stop charging, but also start the discharge-charging cycle.This practice may have its own purpose, but it's clearly bad for battery life.At the same time, long charging takes a long time, which often needs to be carried out at night. In the case of China's power grid, the voltage in many places is relatively high at night and fluctuates greatly.As I have said before, lithium batteries are very delicate, it is much worse than nickel electricity in charge and discharge resistance to fluctuations, so this brings additional danger.

In fact, shallow charging is more beneficial for lithium battery, only when the power module of the product is calibrated for lithium battery, it is necessary to put deep and deep charging.Therefore, the use of lithium power supply products do not have to stick to the process, everything to convenience first, charge at any time.