What should I pay attention to what charging and discharge of a lithium ion battery?

　　Author ：Iflowpower – Portable Power Station Supplier

When charging the start, the voltage to be charged should be tested. After the voltage rises to 3V, enter the standard charging process. The standard charging process is: When the current stop constant current charging, the lithium ion battery voltage rises to 4.

20V, change to constant pressure charging, insist on the charging voltage of 4.20V. At this time, the charging current gradually decreases, when the current drops to 1/10 of the charging current, charging is completed.

Generally, the lithium battery charging current is set between 0.2c to 1c, the larger the current, the faster charging, the greater the battery heat generation. And, too large current charging, capacity is not full, due to the electrochemical reaction requirements of the battery.

I will follow the beer, and the foam will appear in the words. 1. The discharge current cannot be too large.

Excessive currents cause heat inside the lithium-ion battery, which may constitute a nest sexual damage; 2, can not over-discharge, the lithium-ion battery is most afraid of over-discharge, once the discharge voltage is below 2.7V, It may be possible to recruise the battery; 3, prevent frequent depth charge and discharge: lithium-ion battery has no memory, many people are using lithium telecoms or lithium-electric digital products, love to use the power to take a little less than left (maintenance board maintenance) and then then To charge, in many people's eyes, this is also a way to activate the battery; Internal short circuit in the battery, thereby destroying lithium ions, triggering circuit safety; 5. When the long time is placed in an overheated environment, it will significantly reduce the life of the battery.

Tough is increased by internal pressure, even if there is no explosion, the battery will be rapidly invalidated in high heat. Chasing and discharge of lithium ion batteries: charging of lithium ion batteries: according to the structural characteristics of lithium electrical, the highest charge stop voltage should be 4.2V, can not be charged, otherwise, it will take too much lithium ion in the positive electrode, but make the battery.

Its charge and discharge is high as high as a special constant current, and the constant voltage charger is interrupted. Generally, constant current charging to 4.2V / festival, transfer to constant voltage charging, when the constant voltage charging current is reduced to 100mA,.

Charging current (mA) = 0.1 ~ 1.5 times battery capacity (such as 1350mAh battery, its charging current can be controlled between 135 to 2025mA).

Conventional charging current can be selected at a capacity of 0.5 times battery capacity, and the charging is about 2 to 3 hours. Discharge of lithium ion battery: Due to the internal structure of the lithium-ion battery, the lithium ion cannot be moved to the positive electrode during discharge, and it is necessary to keep a local lithium ion in the negative electrode to ensure that the lithium ion can be embedded in the channel when charging is next.

Otherwise, battery life is shortened. In order to ensure that local lithium ions have been left after discharge in the graphite layer, it is necessary to severely limit the lowest voltage of the discharge, that is, the lithium ion battery cannot be discharged. The discharge stop voltage is generally 3.

0V / section, minimum cannot be less than 2.5V / section. Battery discharge time is related to lithium ion battery capacity, discharge current size.

Battery discharge time (hour) = battery capacity / discharge current. Lithium-ion battery discharge current (mA) should not exceed 3 times the battery capacity. (Such as a 1000mAh battery, the discharge current should be severely controlled within 3A), otherwise it will damage the battery.

How to discharge the lithium-ion battery? Lithium-ion battery is balanced in the operation, in theory, the lithium-ion battery discharge should be paying attention to the discharge rate and discharge depth. The discharge depth is the ratio of the amount of discharge and the nominal capacity, the best reference index in applicable is voltage. The general standard is that a lithium-ion battery is discharged between 2.

75V and 3V, it can be charged to the battery. Since it is less than 2.75V, it is prone to rechargeable battery taboo, and when it is in the internal structure, It is an excessive volatilization of the electrolyte.

The second is that the negative reaction of the lithium ion battery makes the dielectric film changing constitutes a decrease in desert, and constitutes a capacity of eternal loss.