ONEX 18650

What Is the Marking Method for Rechargeable Batteries Specified by IEC?

According to the IEC61960 standard, the identification of the secondary lithium battery is as follows:

01) The identification composition of battery: 3 letters, followed by 5 numbers (cylindrical) or 6 (square) numbers.

02) The first letter: indicates the negative electrode material of the battery.

  • I—represents lithium ion with built-in battery
  • L—represents lithium metal electrode or lithium alloy electrode

03) The second letter: indicates the cathode material of the battery.

  • C—cobalt-based electrode
  • N—nickel-based electrode
  • M—manganese-based electrode
  • V—vanadium-based electrode

04) The third letter: indicates the shape of the battery.

  • R- represents cylindrical battery
  • L – represents square battery

05) Numbers: Cylindrical battery: 5 numbers respectively indicate the diameter and height of the battery. The unit of diameter is millimeter and the unit of height is tenth of a millimeter. When any dimension of diameter or height is greater than or equal to 100mm, a diagonal should be added between the two dimensions.

Square battery: 6 numbers indicate the thickness, width and height of the battery, in millimeters. When any of the three dimensions is greater than or equal to 100mm, a slash should be added between the dimensions; if any of the three dimensions is less than 1mm, the letter “t” is added in front of this dimension, and the unit of this dimension is one tenth of a millimeter.

For example:

  • ICR18650 represents a cylindrical secondary lithium ion battery. Its cathode material is cobalt.its diameter is about 18mm, and its height is about 65mm.
  • ICP083448 represents a square secondary lithium-ion battery. Itscathode material is cobalt. The thickness is about 8mm, the width is about 34mm, and the height is about 48mm.

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