LG INR18650 MJ1

Key features

• 259.6Wh/kg at 23°C
  • 266Wh/kg [6]
• 736Wh/litre at 23°C
  • 720Wh/litre [6]
• 965W/kg
• 2736W/litre

Designed to meet

• Safety:
• Transport: UN38.3
• Quality:

• Nominal Capacity = 3.5Ah
• Nominal Voltage = 3.635V
• Nominal Energy = 12.72Wh
• Charge
  • Charge cutoff voltage = 4.2V
  • Maximum charge rate = 1.0 C (3400mA)
  • Temperature limits = 0° to 45°C
• Discharge
  • Cutoff voltage = 2.5V
  • Maximum discharge current = 10A
  • Maximum pulse discharge = 18.9A

Maximum current was based on 50% SoC nominal voltage, cutoff at 2.5V and DCIR of 60mΩ

• DCIR = 33mΩ
• Temperature limits = -20° to 60°C
• Storage temperature
  • 1 month -20 ~ 60℃
  • 3 month -20 ~ 45℃
  • 1 year -20 ~ 20℃
• Cycle life = 400 cycles [2]
  • see detail ageing test conclusions from EU project

Dimensions

• Diameter: 18.4 +0.1 / -0.3 mm (Max. 18.5mm)
• H: 65.0 ±0.2mm (Max. 65.2mm)
• Volume: 0.0172litres
• Mass:
  • Maximum = 49.0g
  • Average = 46.8g

• Cathode
  • nickel (Ni)-rich lithium nickel manganese cobalt oxide (811)
  • length = 610mm
  • width = 59mm
  • thickness = 0.16mm
• Anode
  • graphite based with a presence of Si
  • length = 660mm
  • width = 60mm
  • thickness = 0.17mm
• Case
  • wall thickness = 0.19mm
    • average = 0.165mm [9]

Test data

• Maximum discharge current =
• Short circuit current = A
• ACIR ≤ 40 mΩ at 1kHz
• DCIR = 60mΩ [4]

• Capacity
  • The specification sheet [2] shows a significant capacity temperature dependence

• Ageing
  • The EVERLASTING EU project used this cell for their ageing studies and conducted extensive testing. Their conclusions from their report [1] are shown below:
  • The ageing stress factor investigated in this study are:
    • the environmental temperature during life cycling and during storage where it was shown that high (45°C) and very low (0°C) temperatures increases the ageing rate. This was observed for both calendar and life cycling tests.
    • the cycling C-rate where the charge and discharge currents were varied. It was shown that high discharge rate (3C) led the cell to its EOL in less than 600 equivalent cycles.
    • the cycling window where the two most common ranges were used i.e. 70 to 90%SOC (corresponding to home to work daily trip) and 10 to 90%SOC. This study shows that cycling in a wide SOC window decreases the cells’ lifetime.
    • the storage SOC level. This test simulates the effect of car parking on the cell lifetime. It was shown that high (45°C) and low (0°C) temperatures increases the cell’s ageing rate. And low SOC (10%) has the lowest degradation effect compared to 70% and 90%SOC. However it was shown that compared the cells stored at 90%SOC, the ones stored at 70%SOC has a higher degradation rate. Additional ageing tests were started to better understand this behaviour rand will be reported in later reports and SCI papers.

Safety data

Independent safety tests of the cell.

• Thermal Runaway
  • energy released = 73.8kJ
  • 80% of energy released through ejected material and gases