What is a lithium battery charger? What aspects should we pay attention to when using?
Lithium battery charger is a charger specially used to charge lithium ion batteries.
Lithium ion batteries have higher requirements for Chargers and need protection circuits, so lithium ion chargers usually have higher Control Precision and can charge lithium ion batteries with constant current and constant voltage. Lithium Battery Charger features single section or 8.
Ideal control circuit for 4V double lithium ion or lithium polymer battery charger; Above 1 [%]The voltage accuracy;
During the pre-charging process, the user can change the pre-charging current; Constant current charging, charging current adjustable; Constant voltage charging process; Automatic recharging process; Temperature Monitoring during charging; LED charging status indication; Detection of abnormal state of battery;
When the power supply voltage is low, it is in the sleep mode of low power consumption, and the battery leakage current is extremely small; Few peripheral components;
If your lithium battery is full, it is also white on the charger.
And none of us can guarantee that the characteristics of the battery charging and discharging protection circuit will never change and the quality will be foolproof.
So your battery will linger on the edge of danger for a long time.
This is another reason why we oppose long charging.
Regarding the experimental table of charge and discharge cycles of lithium ion batteries, the data on cycle life are listed as follows: cycle life (10% DOD):>1000 times, cycle life (100% DOD):>
200 times, of which DOD is the English abbreviation of discharge depth.
As can be seen from the table, the number of recharges is related to the discharge depth, and the cycle life at 10% DOD is much longer than that at 100% DOD.
Of course, if the relative total capacity converted to actual charging is 10% * 1000 = 100,100% * 200 = 200, the complete charging and discharging of the latter is still better.
However, the life of lithium batteries is mainly reflected in the charging and discharging cycle, which is an absolute concept. Last time 30% of electricity was used, it was fully charged, and next time 70% of electricity was used, it was fully charged, this happens to be a charging cycle.
Therefore, we still follow the slogan of the inventor of lithium battery'Ready to use, ready to use'The method uses lithium batteries.
Supernormal time charging and complete use of empty power will cause overcharging and overdischarging, which will cause permanent damage to the positive and negative electrodes of lithium ion batteries. From the molecular level, excessive discharge will lead to excessive release of lithium ions from the anode carbon, which will lead to the collapse of its lamellar structure. Excessive charging will hard stuff too much lithium ions into the anode carbon structure, and make some of these lithium ions can no longer be released.
This is also why lithium ion batteries are usually equipped with charge and discharge control circuits.
Lithium ion batteries generally have Management chips and charging control chips.
Among them, the management chip has a series of registers with values such as capacity, temperature, ID, charging status, discharge times, etc. These values will gradually change in use. In the instructions for use,'
It should be fully used once a month or so'
The main function of this method should be to correct the improper values in these registers so that the charging control and nominal capacity of the battery conform to the actual situation of the battery. The electric quantity statistics chip records the discharge curve (Voltage, current, time)The battery power can be sampled and calculated.
However, after the lithium ion battery is used many times, the discharge curve will change. If the chip has no chance to read out a complete discharge curve again, the calculated electric quantity is inaccurate.
So we need a deep charge to calibrate the battery chip.
Precautions for daily use, there is no need to charge the battery for the first three times, such as 12 hours to activate the battery. The charging circuit is already protected and it is useless to plug it in. Complete discharge should be avoided during normal use (Use to black screen power off).
After being left unused for a long time or frequently charged and used for a period of time, the method is to charge and discharge completely at one time, and then the battery can be charged and used immediately, only after a long period of use, it is necessary to re-correct the full charge and discharge again.
If a battery is not used for a long time, it is recommended to charge it to 40% before placing it to protect the battery.
Finally, the life of the lithium battery is mainly reflected in the charge and discharge cycle, which is an absolute concept. Last time, 30% of the electricity was used and fully charged, and next time, 70% of the electricity was used and fully charged, this happens to be a charging cycle.
Know the above lithium battery chargers, do you know anything about lithium batteries.
However, we need lithium battery chargers and so on to find Esai electronics. Our company specializes in lithium battery chargers and electric car chargers. The above data is collected from the network! (
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