10 common questions about the use of lithium batteries

10 common questions about the use of lithium batteries
1. How to use the newly purchased lithium battery? Should it be charged or discharged first? How to charge and discharge?
It has been activated at the factory, the battery is charged first, and it can be used normally.
2. The voltage of the new battery is unbalanced at the beginning of use. After charging and discharging several times, it becomes normal again. What is the problem?
The main reason is that although the individual cells in the battery pack are paired, there will still be individual differences in self-discharge. It usually takes more than 3 months for a new battery to arrive from the factory to the user. The voltage of the single cell will be different due to the difference in self-discharge, so that the voltage difference in the battery pack will become larger (that is, unbalanced); because the current chargers on the market have the function of charging balance, so the general The imbalance will be fixed when charging through the charger.
3. What kind of environment should lithium batteries be stored in?
Store in a cool and dry environment, room temperature 15-35°C, ambient humidity 65%
4. How long can a lithium battery be used? -How many cycles can it be used normally? What factors affect the life?
Lithium batteries for airplane models can generally be used for about 100 times, and the main factors affecting the lifespan are:
1. Temperature, the battery cannot be used or stored in an overheated environment (35°C);
2 Charging and discharging, the charging and discharging of the battery pack should not be excessive, the voltage of a single battery cell must be between 42-3.0V, and the recovery voltage of a large current operation should be guaranteed to be above 3.4V;
3. Choose a model with appropriate power to avoid the battery pack from being forced to use under overload conditions.
5. Does the new lithium battery need to be activated? Will it be affected if it is not activated?
It does not need to be activated. It usually takes more than 3 months for a new battery to arrive from the factory to the user. The battery will be in a dormant state. It is not suitable for high-intensity discharge immediately, otherwise it will affect the efficiency and life of the battery.
6. What is the reason why the new battery cannot be charged?
The battery has zero power, the internal resistance of the battery is large, and the charger mode is wrong.
7. What does the C number of a lithium battery represent?
"C" is the symbol of battery capacity, which has the same meaning as the symbol of current "". "C number represents the magnification we often say, that is, the abbreviation of the current size that the battery can work on the basis of the nominal capacity, with 2200mAh20C as the For example, 20C indicates that the battery can work normally with a current of 2200mAx20=44000mA; 20C discharge means discharging the battery with a current of 44000mA.
8. What is the best storage voltage for lithium batteries? What is the battery charge in general?
A single voltage between 3.70-3.90V usually leaves 30-60% of the power
9. What is the normal difference between the single cells of the battery pack? What should I do if the rated pressure difference is exceeded?
It is normal for a new battery within one month of the factory date to be around 30mV, or 0.03V. If the battery pack has been placed for a long time for more than 3 months, it can be used at 100mV, or 0.1V, and the battery pack exceeds the rated voltage difference. A smart charger with balancing function can be used to perform 2-3 small current (1A) charge and discharge cycles, and most battery packs with abnormal voltage differences can be repaired.
10. Can the battery be stored for a long time after it is fully charged? The storage time of the fully charged battery should not exceed 7 days;
Battery life, if not used for a long time, make sure to charge and discharge once every 1-2 months.