What does lithium battery acceptable current, lithium battery charging cycle mean? Li-ion battery charging current and voltage are dynamically changing, which is determined by the chemical substances of the Li-ion battery itself. The performance of the charging IC needs to be configured according to the charging characteristics of the lithium battery itself in order to achieve the correct, safe and efficient use of lithium batteries. Lithium battery charge cycle is an expression of lithium battery power, which means the process of battery power from full to empty and then from empty to full.
A lithium battery can accept the current
The maximum charge current acceptable for lithium batteries is usually 1C or even less, the so-called 1C charge rate refers to the capacity of 1 times the rate of current to charge, charging time of 1 hour. In fact, to have a long battery life, it is basically charged with 0.1~0.3C for 10~4H. That is to say, for a battery with a capacity of 1500mAh, if it is charged with 0.2C, the charging current is 0.2×1500=300mA for 5 hours.
During the charging process, as long as the charging current does not exceed the acceptable current of the lithium battery, there will not be a large number of bubbles in the lithium battery. At the beginning of the charging process, the charging current is much less than the acceptable charging current of the lithium battery, thus the charging time is greatly extended. Later in the charging process, the charging current is greater than the acceptable current of the lithium battery, and thus a large number of bubbles are generated in the lithium battery. This not only wastes power, but also reduces the capacity and life of the lithium battery.
Charging process, if the charging current is always equal to or close to the acceptable current of the lithium battery, the charging speed can be greatly accelerated. When charging to a certain extent, the terminal voltage, outgassing rate and temperature of the lithium battery will increase. The changes of these parameters can be detected in time by various detection devices. When these parameters rise to the specified value, through the control circuit to properly reduce the charging current, you can both improve the charging speed and not produce a large number of air bubbles.
Second, what does the lithium battery charging cycle mean?
Lithium battery charging cycle and lithium battery life is quite closely linked, a charging cycle specifically refers to a lithium battery fully charged and discharged process, if decomposed, a charging cycle is composed of a full charge and a full discharge process. Lithium battery life is related to the number of times its charge cycle is completed, and the number of times the lithium battery is charged and discharged does not have any relationship.
A lithium battery uses only half of its charge on the first day, and then fully charges it again. If it is still so on the second day, i.e., it is charged with half of it and charged down twice in total, this can only be counted as one charging cycle, not two. So usually it may take several charges to complete a cycle, and each completed charge cycle will reduce the power a little.
The life span of a lithium battery is typically 300-500 charge cycles. Assuming that a complete discharge provides 1Q of power, if we do not consider the reduction of power after each charge cycle, the lithium battery can provide or replenish a total of 300Q-500Q of power during its lifetime. From this we know that if it is charged every time with 1/2, it can be charged 600-1000 times; if it is charged every time with 1/3, it can be charged 900-1500 times.
How to maintain the lithium battery?
1, long-term use of lithium batteries should be stored in a cool and dry place, in a semi-charged state is best, full charge storage is dangerous and the battery will be damaged, no battery storage will be destroyed. Every 3 - 6 months, check whether to replenish the electricity.
2, lithium batteries in addition to fear of low power, but also afraid of the point is overheating, especially in the case of hotter days when charging. If your sleeve heat dissipation is very poor, charging will be hot, it is best to take the set off when charging.
3, in the process of charging the phone do not play games or other large load use, the reason is not because of power consumption, but will generate large heat, often this time will feel very hot phone, which often reduces the battery life.
To maximize the effectiveness of the lithium-ion battery, you need to use it often, so that the electrons within the lithium battery is always in a state of flow. If you don't use the lithium-ion battery often, please make sure to remember to complete a charge cycle to the lithium-ion battery once a month to do a power calibration, that is, deep discharge and deep charge once.
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