Popularize the common sense of lithium-ion battery use

APR 15, 2019   Pageview:48

Lithium-ion batteries use common sense, and lithium-ion batteries use common sense:


1. Lithium-ion battery charging


To charge a Li-Ion battery, use a dedicated Li-Ion battery charger.


Lithium-ion battery charging adopts CC/CV mode (constant current + constant voltage), that is, charging with a constant current first, when the voltage reaches 4.2 V*n, it is converted to constant voltage charging until the current is reduced to 0.01C. The charging stops.


Charging voltage: The maximum charging voltage is 4.2V*n (n: number of batteries in series)


Charging current: The recommended charging current is 0.5C (such as a battery with a nominal capacity of 2200mAh, charging current 0.5*2200=1100mAh)


Charging temperature: The battery should be charged in the range of 0 °C ~ 45 °C.


2. Lithium-ion battery discharge


Discharge current: The discharge current should be 1.0 C or less. (If you want to discharge the battery with a current greater than 1.0C, please contact the lithium battery manufacturer)


Discharge termination voltage: The discharge termination voltage of the battery should not be less than 2.5V*n (n: number of batteries in series). Over-discharge of the battery will shorten the battery life and, in severe cases, cause the battery to fail.


Discharge temperature: The battery should be discharged (working) within the temperature range of -20 ° C ~ +60 ° C.


Concept of depth of discharge


The so-called depth of discharge is the ratio of the amount of discharge to the amount of stored electricity (standard capacity).


For example, the depth of discharge is 20%, which means that 80% of the capacity is left.


Naturally, the smaller the number, the lighter the discharge is.


The relationship between the depth of discharge and the service life: the deeper the depth of discharge, the easier it is to shorten the life;


As the depth of discharge goes deeper, the voltage and current are less guaranteed. Conversely, in many cases, the fuel gauge, the electricity consumption as the termination of the battery, is to ensure a certain voltage and current platform, and the other is to start from the life.


3. Storage of lithium ion batteries


Lithium batteries can be stored in a clean, dry and ventilated room with an ambient temperature of -5 ° C - 35 ° C and a relative humidity of not more than 75%. Avoid contact with corrosive substances and keep away from fire and heat sources. Battery power is maintained at 30% to 50% of nominal capacity. The recommended storage battery is charged every 6 months.


4. Transportation of lithium ion batteries


Lithium batteries should be packed in boxes for transportation. During transportation, they should be protected from severe vibration, impact or squeezing to prevent sun and rain. They can be transported by means of vehicles, trains, ships, airplanes and other means of transportation.


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