The 18650 lithium battery is divided into two types according to size
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2023/09/22 16:09:54
18650 lithium battery is a lithium battery named after the size of the battery, in terms of a single battery, 18650 lithium battery size has two kinds of bare body battery and finished battery, the latter is greater than the former in value, understand the size of 18650 lithium battery may start from its history.
The second battery is named by size is one of the provisions of the International Electrotechnical Commission (IEC), according to the IEC61960 standard, the identification method of the second lithium battery is as follows:
1. Battery identification consists of 3 letters followed by 5 numbers cylindrical or 6 square numbers;
2. The first letter represents the negative electrode material of the battery: I represents the lithium ion with the built-in battery, L represents the lithium metal electrode or lithium alloy electrode;
3. The second letter indicates the positive electrode material of the battery: C electrode based on cobalt, N electrode based on nickel, M electrode based on manganese, V electrode based on vanadium;
4. The third letter indicates the shape of the battery: R means cylindrical battery, L means square battery;
5. Number: cylindrical battery 5 numbers respectively represent the diameter and height of the battery, the unit of diameter is mm, the unit of height is one-tenth of a millimeter, the diameter or height of any size greater than or equal to 100mm between the two sizes should be added a diagonal line; The six numbers of the square battery respectively indicate the thickness, width and height of the battery, the unit of mm, and the diagonal line should be added between the three sizes when any one of them is greater than or equal to 100mm; If any of the three sizes is less than 1mm, the letter t is added before this size, and this size is in one-tenth of a millimeter. For example:
ICR18650: represents a cylindrical secondary lithium-ion battery, the positive electrode material is cobalt, its diameter is about 18mm, the height is about 65mm.
There is a simple three-part logo composition:
For example, LC18650: lithium-ion battery Cylindrical battery specifications are 18m in diameter and 65.0mm in height.
The above description of the size of the 18650 lithium battery is a approximate number, the products of various battery manufacturers will have some small differences, but the difference 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 in diameter and ±2.0mm in height; Identifying 18650 lithium batteries, similar performance is the true meaning.
The 18650 lithium battery named by IEC is actually a bare body battery, also known as a cell in the industry; In practical terms, it is also necessary to add protection boards, leads and labels in the battery packaging factory, such as the lithium battery cleaner lithium battery product prepared by Dongguan Jusda using 2200mAh18650 cells, and its product size is 19.5mm in diameter and 70.0mm in height. This is obviously larger than the cell size.
Speaking of which, we understand that when it comes to the concept of "18650 lithium battery size", there may be two different meanings: one is the naked 18650 lithium battery size, in this sense, the battery manufacturers are mainly Sanyo, Panasonic, Samsung, LG, Bic and so on; The other is the size of the packaged 18650 lithium battery, in this sense the size is absolutely greater than the size of the bare 18650 lithium battery, so we must pay attention to the language environment in which the concept of 18650 lithium battery size is located.
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