Comparison Of 18650 Lithium Battery And 26650 Lithium Battery

Comparison of advantages and disadvantages of 18650 lithium battery and 26650 lithium battery. The so-called 18650 lithium battery and 26650 lithium battery represent the size of the lithium battery. For example, a 18650 lithium battery, 18 is the battery diameter, 650 is the height of the battery, and the length is in millimeters. 26650 lithium battery, which refers to the battery with a diameter of 26mm and a length of 65mm, a cylindrical battery. What are the advantages and disadvantages of 18650 lithium battery and 26650 lithium battery?

Advantages of 18650 lithium battery: large capacity, long life, high safety performance, no explosion, no combustion; no toxicity, no pollution, high voltage, no memory effect, no need to empty the remaining power before charging, easy to use, small internal resistance, It can be combined in series or in parallel to form a 18650 lithium battery pack with a wide range of applications.

Advantages of 26650 lithium battery: high energy density, low self-discharge rate, stable charge and discharge performance, no memory effect, no decomposition when heat, high safety performance and long life cycle. High voltage, can be used in series or in parallel to form a 26650 lithium battery pack, environmentally friendly and non-polluting.

Comparison of advantages and disadvantages of 18650 lithium battery and 26650 lithium battery

1. Battery volume comparison

The volume of the 26650 lithium battery is larger than that of the 18650 lithium battery. Their cell height is the same, the cell diameter is different, the diameter of the 26650 lithium battery cell is 26mm, and the diameter of the 18650 lithium battery cell is 18mm.

2. Battery capacity comparison

Under the same battery material, the battery capacity of 26650 is larger than that of 18650. It is assumed that the same ternary material 26650 battery is generally around 5200mAh, and the capacity of 18650 battery is about 2600mAh.

3. Application environment comparison

18650 lithium battery is used in lighting fixture battery, industrial supporting lithium battery pack, power tool battery, electric bicycle battery, power lithium battery pack, etc., and 26650 lithium battery is applied in integrated solar street lamp lithium battery pack, energy storage station There are many solar energy storage batteries.

Development status and historical reasons of 18650 lithium battery and 26650 lithium battery

The 18650 lithium battery is a standard lithium battery model developed by SONY in Japan in 1992. It was born at the material level and manufacturing level at that time. It is a combination of battery cost and performance balance. In notebooks, cameras, toys and lighting equipment, 18650 batteries have been very mature and stable after years of development; at the same time, because of its long history, it has formed a relatively mature market application.

With the development of new energy applications, the status of 18650 lithium battery has been gradually affected. Larger cylindrical lithium battery products and square battery products have appeared in the market in succession, such as 26650 lithium battery with relatively stable stability and consistency. 21700 lithium battery and square battery with various specifications.

Because the power battery needs thousands of batteries to be used together, it puts higher requirements on the consistency and safety of the battery products. The smaller the number of power battery system management batteries of the same capacity, the higher the relative safety and the longer the service life. Will increase. This puts higher requirements on the capacity of the power battery to reduce the use of the number of batteries, and to reduce the safety and life pressure of the power battery.

In general, the performance of the 18650 lithium battery is better. The 26650 lithium battery is the best partner for the flashlight, and other electronic devices are used less, so the penetration rate is not high.

The above is the introduction of the advantages and disadvantages of the two lithium batteries 18650 and 26650, of course, not all of them are described correctly, but supplemented according to the mass consumption situation.