Cylindrical 21700 High-Power Cell
Ampace JP40
High-power cylindrical 21700 cell delivering 4 Ah capacity with 214 Wh/kg energy density and 60 A maximum discharge rate.
Overview
The Ampace JP40 is a high-power Li-ion cylindrical 21700 cell designed for applications that demand sustained high current and high energy density. Manufactured in china, this cylindrical 21700 cell delivers 4 Ah capacity and 14.8 Wh of energy at a nominal voltage of 3.7 V, with a maximum continuous discharge capability of 60 A, making it well suited to high-power systems operating under aggressive load profiles.
Key Features
Extremely high discharge rate: 60 A continuous (15.0 C)
Charging rate: 2.0 C charging rate
Energy density: 214 Wh/kg
Power density: 3217 W/kg
Applications: aviation, motorsports, e-mobility
Technical Specifications from the Manufacturer
Parameter
Manufacturer
Ampace
Model
JP40
Type
Li-ion
Form factor
Cylindrical 21700
Country of origin
China
Release year
2024
Nominal voltage
3.7
Energy capacity [Wh]
14.8
Capacity [Ah]
4
Gravimetric energy density [Wh/kg]
214
Gravimetric power density [W/kg]
3217
Max continuous discharge [A]
60
Volume [cm³]
24.86
Mass [g]
69
Positive electrode (cathode)
Ni-based
Negative electrode (anode)
Graphite
Value
Applications & Use‑Cases
The Ampace JP40 is well suited to the following applications due to its cylindrical 21700 and high power performance.
Aviation: Requires high specific energy for extended flight duration, high power-to-weight ratio for climb performance, and reliable operation across wide temperature ranges at altitude.
Motorsports: Demands sustained high discharge under competitive load profiles, rapid transient response for acceleration, and thermal stability to maintain performance during race conditions.
E-Mobility: Requires balanced energy and power density for range and acceleration, high cycle life for daily use, and robust calendar life to ensure long-term reliability.
General Applications: Suitable for applications requiring reliable lithium-ion performance with proven cycle life, consistent capacity delivery, and operational safety across diverse use cases.
.jpg)
Performance & Model Data
Below are modelled performance metrics for the Ampace JP40 across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
The Ampace JP40 constant-current plots reveal voltage behaviour under steady loads, ideal for analysing efficiency.
Constant Current Temperature
The Ampace JP40 constant-current plots reveal temperature behaviour under steady loads, ideal for analysing thermal response.
Pulse Power Behaviour
The Ampace JP40 pulse power map evaluates short-duration load responses, allowing engineers to determine the maximum available power as a function of state of charge and temperature.
Dynamic Profile Response
The Ampace JP40 mission-profile plots simulate real-world duty cycles, showing how the cell manages dynamic power demands and temperature changes.
.png)
Case Studies
See how we helped McMurtry reduce cell evaluation time by 70% through data driven testing and modelling.
Motorsports
McMurtry Automotive: Faster cell evaluation
McMurtry Automotive used The Voltt and validated cell models to evaluate the transition from the Molicel P45B to P50B during early pack concept development.
Side by side modelling enabled rapid comparison of electrical and thermal behaviour, avoiding lengthy physical test campaigns. This approach reduced cell evaluation time by seven months, allowing the team to lock in cell selection and pack assumptions earlier while lowering technical risk and accelerating vehicle development.
Comparison with Related Cells
Compare the Ampace JP40 with similar Cylindrical 21700 cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
Ampace
Ampace is a Chinese high-power battery manufacturer
Ampace Technology Limited is a Chinese battery manufacturer producing lithium-ion cylindrical cells for electric vehicles, consumer electronics, and industrial applications. Their 21700 cells combine modern cell chemistry with competitive manufacturing capabilities to serve Asia-Pacific markets. Ampace focuses on delivering reliable battery performance at accessible price points for mass-market electric vehicle adoption. The company's manufacturing facilities employ automated production equipment to ensure consistent quality control and scalability. Ampace's product development targets mainstream EV specifications, balancing energy density, power capability, and cycle life requirements. As a newer entrant in the competitive battery manufacturing landscape, Ampace leverages China's battery supply chain advantages to offer cost-effective solutions for growing electrification demands.
Frequently Asked Questions
What is the capacity and voltage of the Ampace JP40?
The Ampace JP40 has a nominal capacity of 4.0 Ah and a nominal voltage of 3.7 V, providing 14.8 Wh of energy per cell.
What is the maximum continuous discharge capability of the Ampace JP40?
The Ampace JP40 supports continuous discharge rates up to 60 A, delivering exceptional power density of 3,217 W/kg.
How much does the Ampace JP40 weigh and what is its volume?
The cell has a mass of 69 g and a volume of 24.86 cm³.
In which industries is the Ampace JP40 commonly used?
The Ampace JP40 is used across aviation, motorsports, drones, and power tools, applications that demand both high energy and power density.
What is The Voltt and how does it accelerate cell evaluation?
The Voltt is About Energy's digital cell simulation platform that models electrochemical and thermal performance, reducing evaluation time by up to 70% compared to laboratory testing.
What data can be extracted using The Voltt?
Engineers can simulate and visualise voltage, temperature, and power responses under constant-current or mission-profile conditions, generating detailed discharge plots to support accurate cell comparison and validation.
