Yes, the cell capacity of 21700 battery is 3ah to 4ah, which can be combined into 48v 10ah lithium battery, which is very good for 250w motors and can last 35km.
The 48V lithium battery is divided into 13 strings and 14 strings. The advantage of 14 strings is that the full voltage is 58.8V. It can be charged directly with the original 48V lead-acid charger. Full voltage is reached, the green light flashes normally.
A 21700 battery needs 2A to charge. How many AAs can I use to charge a 12 cell battery?
The difference between 21700 and 18650 batteries is the size, specified capacity and application area.
1. Various sizes: 18650 lithium battery, diameter 18MM, length (height) 65MM. Usually they are round. The 21700 lithium battery, with a diameter of 21 mm and a length (height) of 70mm, is generally called a lithium-ion battery.
2. Different specifications and capacities: The capacity of 18650 lithium-ion is between 1200 mAh and 3600 mAh, but the most mature technology is generally between 2000 mAh and 3200 mAh. The capacity of the 21,700 lithium-ion batteries ranges from 3,000 mah to 5,000 mah.
3. Different application fields: 18650 lithium ion battery is suitable for rechargeable battery lighting, processing and manufacturing equipment lithium batteries, rechargeable battery inflatable tools, electric vehicle charger batteries, batteries lithium electric products, 3C digital products, smart home, etc.
Charging and discharging principle of lithium battery
The working principle of lithium-ion battery refers to its charging and discharging principle. discharge. When the battery is charged, lithium ions are generateds on the positive electrode of the battery and the generated lithium ions move to the negative electrode via the electrolyte. The carbon used as a negative electrode has a layered structure with numerous micropores. The lithium ions that reach the negative electrode are integrated into the micropores of the carbon layer. The more lithium ions, the higher the charging capacity.
Similarly, when the battery is discharged (that is, the process when we use the battery), the lithium ions embedded in the carbon layer of the negative electrode are released and return towards the positive electrode. The more lithium ions that return to the positive electrode, the higher the discharge capacity. What we usually call battery capacity refers to the discharge capacity.
It is not difficult to see that during the charging and discharging process of lithium-ion batteries, lithium ions are ins a state of movement from the positive electrode → the negative electrode → the positive electrode. If we compare the lithium-ion battery to a rocking chair, the two ends of the rocking chair are the poles of the battery, and the lithium ions are like excellent athletes, running back and forth at both ends of the rocking chair. So, experts have given the lithium-ion battery a nice name: rocking chair battery.
21700 is the battery model. The general capacity of this ternary lithium battery model is 3000-5000mAh, and the platform voltage is 3.65V. Then the capacity of 3S12P is 36Ah. -60 Ah, and the platform voltage is about 11 V.
FalseSuppose the capacity of the single battery is 3000 mAh (i.e. 3 Ah), then the capacity of the battery 12P is 36 Ah. Due to the welding of the cylindrical battery tabs, the charging rate is slightly lower thanthat of 0.5 C. that it can support a charging current of 18 Ah. Then charging with a current of 10 A poses no problem.
It depends on the battery capacity. If the capacity of a single battery is more than 2000 mAh, charging with 10 Ah will generally not be a problem if the battery has good performance or the capacity reaches more than 4000 mAh. , recharging with 20Ah or more will be permitted.