Generally, the charging current of a 20 Ah battery is 3 A. You can also use 2 A, but the charging time will be longer.
The standard charging of lithium batteries is generally 0.2C charging, that is, charging with a current of 4A
Fast charging of lithium batteries lithium usually charges at 0.5C, that is, charging with a current of 10A (some also support 1C charging, if in doubt, it is better to press on 0.5C).
That is to say: charging with a current of 4A to 10A is possible, depending on your needs (if you are not in a hurry, charging at 0.2C/4A is recommended) ;
Recommendation: 84V 4A slow charge charger; 84V 10A charger for fast charging;
Detailed information: The principle of charging is that the charger voltage is greater than the bat voltagelaughs before it can be loaded. The greater the difference in electromotive force between the two. Secondly, the faster the charging, the higher the charging current, so the maximum voltage (without charging) of a general 24V charger is 28V, and 60A refers to the output current capacity at full charge. When you charge, the charger is already charged. , and the voltage at this time corresponds to when the battery is charged. The voltage and current of 40A is the charging current, which will become smaller and smaller as the charging is completed. Additionally, the magnitude of the charging current is also related to the battery capacity. Baidu Encyclopedia - Battery Charger
Usually it is 0.5C, which is 1A, and the type of rate is 1200-1500, and the charging current is also 0.5C, but only 0.7A lithium batteries generally use low charging currentand discharge.
If the current increases, the lithium insertion speed will be too fast and the impact on the material structure of the positive and negative electrodes will be indelible. The lifespan of the 18650 battery will end quickly within a dozen weeks and may also cause safety issues. The above refers to bare cells, and usually the finished battery is added with a lithium battery protection board during use, so everyone cares about charging the battery. 18650 Don't worry too much about the current level.
Precautions for charging the 18650 lithium battery
When using lithium batteries, it should be noted that the 18650 lithium battery will enter a sleep state after being left for a while. Time, the capacity is lower than the normal value. The duration of use is also shortened. However, batterieslithium are easy to activate. After 3-5 normal charge and discharge cycles, the battery can be activated and restored to its normal capacity.
Due to the characteristics of the lithium battery itself, it has almost no memory effect. Therefore, the user's new mobile phone lithium battery does not require special methods and equipment during the activation process.