The 18650 battery is a lithium battery named after the battery size. For a single battery, the 18650 battery has two types of light body batteries and finished batteries. The latter is numerically larger than the former. Understanding the size of the 18650 battery may be from its origin. Start.

The secondary battery is named after the International Electrotechnical Commission (IEC) according to the size. According to the IEC61960 standard, the identification method of the secondary lithium battery is as follows:
1. Battery identification composition: 3 letters followed by 5 numeric cylinders or 6 square numbers;
2. The initial letter indicates the negative electrode material of the battery: I indicates lithium ion with built-in battery, and L indicates lithium metal electrode or lithium alloy electrode;
3. The second letter indicates the positive electrode material of the battery: C-based cobalt-based electrode, N-based nickel-based electrode, M-based manganese-based electrode, and V-based vanadium-based electrode;
4. The third letter indicates the shape of the battery: R for a cylindrical battery and L for a square battery;
5. Number:
The five numbers of the cylindrical battery indicate the diameter and height of the battery respectively. The unit of diameter is mm. The unit of height is one tenth of a millimeter. When any diameter or height is greater than or equal to 100mm, a diagonal should be added between the two sizes. line;

The square battery 6 digits respectively indicate the thickness, width and height of the battery, in millimeters. When any of the three dimensions is greater than or equal to 100mm, the diagonal line should be added between the dimensions; if any of the three dimensions is less than 1mm, then This size is preceded by the letter t, which is a tenth of a millimeter. For example: ICR18650: Represents a cylindrical secondary lithium ion battery with a positive electrode material of cobalt, having a diameter of approximately 18 mm and a height of approximately 65 mm.

There is a simple three-part logo composition: for example: LC18650: Lithium-ion battery cylindrical battery size is 18m in diameter and 65.0mm in height.
The above descriptions of the size of the 18650 lithium battery are approximate, and the products of each battery manufacturer will have some slight differences, but the access is not large, that is, on the basis of the design of 18m in diameter and 65.0mm in height, the difference is generally ±0.2mm. The height is between ±2.0mm; the 18650 lithium battery is recognized, and the performance is similar. ,

The 18650 lithium battery named by IEC is actually a light body battery, which is also called a battery core in the industry. In practice, it is also necessary to add protective plates, leads and labels to the battery packaging factory, such as Dongguan 2D mAh 18650 battery core preparation. The lithium battery cleaner is a finished lithium battery with a diameter of 19.5mm and a height of 70.0mm. This is obviously larger than the cell size. Having said that, we understand that when we mention the concept of "18650 lithium battery size", there may be two different meanings: one is the 18650 lithium battery size of the light body. In this sense, the battery manufacturers mainly have Sanyo. Panasonic, Samsung, LG, BAK, etc.; the other is the size of the packaged 18650 lithium battery, the size of this is greater than the 18650 lithium battery size of the light body, so be sure to pay attention to the concept of 18650 lithium battery size The locale of the place. Machines and many other equipment.