Page 111 - Handbook of Battery Materials

2.7 Lithium-Ion Batteries 77

Figure 2.65 shows commercialized LiCoO 2 -natural graphite cells and Table 2.18
shows the specification of these batteries. There are two types of batteries: cylindrical
and prismatic. The cylindrical-type battery in Figure 2.65 is called 18650 because
its diameter is 18 mm and its length is 65 mm.
Figure 2.66 shows the discharge characteristics of the 18650-type cell. The
discharge capacity is 1350 mAh, the average discharge voltage is 3.6 V, and the

Figure 2.65 LiCoO 2 -natural graphite cells.
Table 2.18 Specifications of LiCoO 2 –natural graphite cells.

Model Nominal Nominal Standard Dimensions (mm) Weight
voltage capacity charging
(V) (mAh) a method Diameter Thickness Width Height

Cylindrical – – – – – – – –
UR18650 3.6 1350 1 C to 4.1 V 18 – – 6.5 ∼40
UR18500 3.6 900 Constant 18 – – 50 ∼30
Rectangular – – Current– – – – – –
UF812248 – 550 Constant – 8.1 225 48 ∼18
UF102248 3.6 750 Voltage – 10.5 22.5 48 ∼24
UF611958 3.6 400 2.5/h – 6.1 19.5 58 ∼15

a Guaranteed discharge capacity at 0.2 C (E v = 2.7.5V).
◦
◦
Operating temperature: charge at 0–40 C, discharge at −20 to 60 C.
Measurement temperature : 25°C Charge : 1C–4.1V(CC–CV)
4.5 UR18650
Battery voltage (V) 4.0 20C 1.0C 0.2C

3.5

3.0
2.5
0 200 400 600 800 1000 1200 1400
Discharge capacity (mAh)
Figure 2.66 Discharge characteristics of the LiCoO 2 -natural graphite cell.