Which is better, 26650 lithium battery or 18650 lithium battery? The reason why 26650 lithium batteries have gradually become popular in recent years stems from the rapid development of the new energy vehicle industry. Both 26650 lithium batteries and 18650 lithium batteries belong to cylindrical lithium batteries. With the large-scale use of lithium batteries, it is inevitable that a larger capacity 26650 lithium battery will replace the trendy 18650 lithium battery in the 3C era.
The so-called 18650 lithium battery and 26650 lithium battery represent the size of the lithium battery, such as 18650, 18 represents the diameter of the battery, 650 represents the height of the battery, and the length is in millimeters. Regarding the discharge performance, it has nothing to do with the 18650.
The battery life of 18650 lithium battery and 26650 lithium battery is definitely different, because these two models are named after the size, 18650, which means straight 18MM, height 65MM, in this way, 26650 must be more than 18650 volume ratio Larger, so there is more space for filling materials to achieve larger capacity. At present, the capacity of 18650 is 2200, 2600, 3100MAH, etc., while the capacity of 26650 is generally 4000, 4200, 4500MAH, and the battery life will be longer.
Comparison of 26650 lithium battery and 18650 lithium battery
●Battery volume comparison
The volume of the 26650 lithium battery is larger than that of the 18650 lithium battery. Their cell heights are the same, and the cell diameters are different. The 26650 lithium battery cell diameter is 26mm, while the 18650 lithium battery cell diameter is 18mm.
●Comparison of battery capacity
Under the same battery material, the battery capacity of 26650 is larger than that of 18650. Assuming that the 26650 battery with the same ternary material is generally about 5200mAh, the capacity of 18650 battery is mostly about 2600mAh.
●Application environment comparison
18650 lithium batteries are used in lighting lamps, industrial supporting lithium batteries, power tool batteries, electric bicycle batteries, power lithium batteries, etc., while 26650 lithium batteries are used in integrated solar street light lithium batteries, energy storage stations , solar energy storage batteries and so on.
The rated capacity of IFR26650 is 3000mAh, and the rated capacity of IFR18650 is 1100~1400mAh.
●The battery capacity is different
Under the same battery material, the capacity of 26650 lithium battery is larger than that of 18650 battery. Assuming that the 26650 battery with the same ternary material is generally about 5200mAh, the capacity of 18650 battery is mostly about 2600mAh.
The advantages of 26650 lithium battery over 18650 lithium battery
- Higher single capacity
At present, the capacity of the mainstream 18650 lithium battery in the ternary system in China is usually 2900-300mAh, so the capacity advantage of the 26650 lithium battery is obvious.
- Lower cost
Due to the increase in volume and structural changes, the use of some lithium battery accessories is smaller, the cost of raw materials will be reduced, and the production efficiency of battery cells is also higher than that of 18650 lithium batteries. In terms of the cost of lithium battery pack PACK, because the battery pack of the same capacity uses fewer single 26650 lithium batteries, so in terms of structural accessories and battery management system (BMS), the management difficulty is reduced, and savings can be made. cost.
- Smaller space
Because the number of 26650 lithium batteries used in the battery pack is reduced, the overall volume of the battery pack will also be reduced after offsetting some of the factors that increase the diameter.
The above is the difference between 26650 lithium battery and 18650 lithium battery. Compared with 18650 lithium battery, 26650 lithium battery has the characteristics of stable quality of cylindrical battery, high level of production automation, good product consistency, and excellent heat dissipation performance. Combined with the excellent capacity characteristics and high consistency of the 26650 lithium battery, as well as the excellent structural design and mature manufacturing practice of the cylindrical battery, the 26650 lithium battery will gradually replace the 18650 lithium battery in the application of power batteries.