With the development of lithium battery technology, there are more and more types of cylindrical lithium batteries. Cylindrical lithium ion batteries are divided into lithium cobaltate, lithium manganate and ternary materials. The three materials have different advantages. Let's look at the models and specifications of cylindrical lithium batteries.

Cylindrical lithium-ion cells are usually represented by five digits. From the left, the first and second digits refer to the cell diameter, the third and fourth digits refer to the cell height, and the fifth digit refers to the circle. There are many types of cylindrical lithium batteries, including 10400, 14500, 16340, 18650, 21700, 26650, 32650, etc.

1. 10440 battery

The 10440 battery is a lithium-ion battery with a diameter of 10 mm and a height of 44 mm. It is the same size as what we often call the No. 7 battery. The capacity of this battery is generally very small, only a few hundred mAh. It is mainly used in mini electronic products. Such as flashlight, mini stereo, loudspeaker, etc.

2. 14500 battery

14500 battery is a lithium-ion battery with a diameter of 14 mm and a height of 50 mm, which is also the specification size of what we have always called No. 5 battery. This kind of battery is generally 3.7V or 3.2V, and its nominal capacity is relatively small, which is a little larger than 10440 battery. It is generally 1600 mAh, with excellent discharge performance. The most important application field is consumer electronics, such as wireless audio, electric toys, digital cameras, etc.、

3. 16340 battery

16340 battery is a kind of lithium-ion battery with a diameter of 16mm and a height of 34mm. This kind of battery is often used in high-light flashlights, LED flashlights, headlights, laser lamps, lighting fixtures, etc. because of its low height and low capacity.

4. 18650 battery

18650 battery is a lithium-ion battery with a diameter of 18 mm and a height of 65 mm. Its biggest feature is that it has a very high energy density, almost 170 watt hours/kg. Therefore, this kind of battery is a battery with good cost performance. We often see this kind of battery, because it is a relatively mature lithium-ion battery, and its system quality stability is good in all aspects, and it is widely applicable to battery capacity of about 10 kilowatt hours, For example, on small appliances such as mobile phones and laptops.

5. 21700 battery

21700 battery is a kind of lithium-ion battery with a diameter of 21mm and a height of 70mm. Because its volume increases, the space utilization rate increases, and the energy density of cell monomer and system can be improved. Its volume energy density is much higher than that of 18650 battery. It is widely used in digital, electric cars, balance cars, solar energy lithium-ion battery street lamps, LED lamps, electric tools, etc. The major manufacturers of such batteries include Tesla, Samsung, Panasonic, Bike and Mengshi New Energy.

6. 26650 battery

26650 battery is a lithium-ion battery with a diameter of 26 mm and a height of 65 mm, with a nominal voltage of 3.2 V and a nominal capacity of 3200 mAh. With excellent capacity and high consistency, this battery has gradually become the trend of replacing 18650 battery, and many products in the power lithium battery will also gradually favor it.

The new energy testing equipment developed and produced by Ruijie Instrument can effectively test the short circuit problem, OCV, internal resistance and other parameters of the cylindrical battery. Ruijie Instruments is committed to becoming a leading supplier of testing and measuring equipment in the new energy industry.

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