The Ampace JP40 is a tabless 21700 cylindrical format cell designed to deliver high current discharge.
Metrics
- = 214.5 Wh/kg
- = 595.3 Wh/litre
- = 5,072 W10s/kg
- = 14,078 W10s/litre
- Nominal Capacity = 4 Ah
- Minimum = 3.9 Ah
- Nominal Voltage = 3.7V
- Range = 4.2 V to 2.5 V
- Nominal Energy = 14.8 Wh
- Mass = 0.069 kg
- ACIR = 0.004 Ohms @1kHz
- Start of Production (SoP) = 2023 Date
- Dimensions
- Diameter = 21.22 mm
- Height = 70.3 mm
- Volume = 0.0249 Litres
A significant improvement in performance is achieved with the tabless design.
The manufacturing video appears to show the ends of the jelly roll being bent over by an anvil that quickly comes in and punches the roll end [2].
It is interesting comparing this to a teardown of the Tesla 4680 Cell Generation 2 cell where you can see a more refined tabless design.
The improved performance is not just from the tabless design, Ampace have improved the cell stack “Using high kinetic graphite and high-density ternary materials.” [2]
This post has been built based on the support of and sponsorship from: Quarto Technical Services, Eatron Technologies and About:Energy
- Discharge Current
- Peak = 140 A (35C)
- Continuous = 60A (15C)
- Charge Current
- Standard charge = 8A
- Operating Temperature
- Discharge = -30°C to 75°C
- Charge = 0°C to 60°C