What Do Lithium Battery Model Numbers Represent?

Lithium-ion Batteries: What are the Core Model and Specifications?

It's hard to say exactly how many types there are because each battery manufacturer has its own model specifications, and there are also custom battery specifications, etc. The following introduces the naming of lithium battery model specifications and the meanings of the letters and numbers on the battery, to help you better understand battery model specifications.

Cylindrical Lithium Batteries: Model Specifications

The naming of cylindrical lithium batteries consists of three letters followed by five digits, as per the IEC61960 regulations for cylindrical and square batteries:

Cylindrical lithium batteries have 3 letters followed by 5 digits. The first letter 'I' indicates the presence of built-in lithium ions, 'L' indicates lithium metal or lithium alloy electrodes. The second letter indicates the cathode material, 'C' for cobalt, 'N' for nickel, 'M' for manganese, 'V' for vanadium. The third letter 'R' stands for cylindrical.

The five digits, the first two digits indicate the diameter, and the last three digits indicate the height, both in millimeters.

For example: ICR18650 is a cylindrical battery with a diameter of 18mm and a height of 65mm, and the '0' indicates a general-purpose 18650 cylindrical battery with a diameter of 18mm.

3.6V indicates a nominal voltage of 3.6V.

'C' represents the discharge rate of the battery, in milliamperes per hour (mAh), which is colloquially referred to as the discharge size or speed within a unit of time. For example, if a battery with a capacity of 1 hour discharges completely, it is called 1C discharge; if it discharges completely in 5 hours, it is called 0.2C discharge.

Cylindrical Lithium Battery Model Table:

Model | Nominal Voltage (V) | Nominal Capacity (mAh) | Diameter (mm) | Height (mm) | Application Area

14500 |             3.7                 |                    800               |             14         |         50         | Instruments, Consumer Electronics

18650 |             3.7                 |               2000-3500         |          18±0.2     |       65±2.0    | Special Equipment, Medical Equipment, Robots

18500 |             3.6                 |                 800-1500         |          18±0.2     |       18±0.2    | Security Communications, Rail Transit

26650 |             3.2                 |                3200~3500       |            26.2       |          65.6      | Power/Energy Storage, Robots, Emergency Backup

21700 |            3.6                  |                3000-4800        |              21        |           70        | Digital Devices, Power Tools

32650 |             3.2                 |                4500-6500        |         32.4±0.3   |      70.5±0.2   | Instruments, Backup Power, Special Equipment Area

(32700)

Prismatic Lithium Batteries: Model Naming

The naming of prismatic batteries consists of six digits representing the thickness, width, and height of the battery, all 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 dimension is less than 1mm, the letter 't' should be added before the dimension, with the unit being one-tenth of a millimeter.

ICP103450 indicates a prismatic secondary lithium-ion battery with a cobalt cathode, approximately 10mm in thickness, 34mm in width, and 50mm in height.

ICPO8/34/150 indicates a prismatic secondary lithium-ion battery with a cobalt cathode, approximately 8mm in thickness, 34mm in width, and 150mm in height.

ICPt73448 indicates a prismatic secondary lithium-ion battery with a cobalt cathode, approximately 0.7mm in thickness, 34mm in width, and 48mm in height.

Prismatic Lithium Battery Model Table:

Model    |                                  Dimensions                                       | Nominal Capacity (mAh) | Internal Resistance (mΩ) | Nominal Voltage (V) |

                Thickness (±0.3mm) | Width(±0.3mm) | Height (±0.5mm)