Datasheet | Panasonic Ncr21700t
Panasonic NCR21700T is a high-performance lithium-ion battery known for its high energy density and high discharge capabilities. While often associated with Tesla Model 3 and Model Y
battery packs, it is also popular in power tools, drones, and e-bikes. TechInsights Core Performance Features High Capacity : Typically rated at (typical) or (minimum). High Discharge Rate : Supports continuous discharge currents of 25A to 30A , with peak pulses up to Long Cycle Life : Designed for durability, often exceeding 1,000 charge/discharge cycles Safety & Stability
: Features stable NCM (Nickel-Cobalt-Manganese) chemistry and is manufactured by , a leader in battery technology. Technical Specifications panasonic ncr21700t datasheet
Based on the official specifications for the Panasonic NCR21700T (typically referred to as the NCR21700T), I have developed a comprehensive technical report. This report is designed to be useful for battery engineers, product designers, and procurement specialists.
Panasonic NCR21700T Datasheet: A Deep Dive into Specs, Performance, and Applications
When engineers, hobbyists, and battery enthusiasts search for the Panasonic NCR21700T datasheet, they are typically looking for more than just a PDF file. They want voltage curves, discharge ratings, thermal limits, and safety specifications to determine if this cell is right for their next project—whether it’s a high-power e-bike, a DIY power wall, or a professional medical device. Panasonic NCR21700T Datasheet: A Deep Dive into Specs,
The Panasonic NCR21700T is a formidable entry in the 21700 form factor (21mm diameter, 70mm length), designed to compete with (and often outperform) the legendary Tesla/Panasonic joint-venture cells. However, unlike Tesla-specific variants, the NCR21700T is available to the general market, making it a favorite among OEMs and advanced builders.
In this article, we will extract, explain, and expand upon every critical specification from the official Panasonic NCR21700T datasheet. We will also discuss real-world performance, safety precautions, and common applications. IEC 62133 (safety for portable batteries)
3.1 Discharge Performance
The NCR21700T is characterized by a flat discharge curve, typical of NCA chemistry.
- Voltage Curve: The cell maintains a voltage above 3.6V for approximately 70% of its discharge cycle.
- Rate Capability: While rated for standard discharge, the cell handles moderate pulses well. At higher discharge rates (e.g., 10A+), the voltage sag is more pronounced, and heat generation increases.
- Temperature Effect: Capacity retention is excellent at room temperature (20°C–25°C). Performance degrades significantly at sub-freezing temperatures (below 0°C), where internal resistance rises.
Testing, characterization, and modeling resources
- Manufacturer datasheet: authoritative source for electrical/thermal limits, recommended charge/discharge profiles, and safety notes — always use for design constraints.
- Independent labs and databases (e.g., Batemo, cell teardowns, and test houses): provide measured C‑rate performance, impedance, thermal characteristics, and aging data across SOC and temperature — valuable for pack modeling and simulation.
- Cell modeling: electrochemical/thermal models (e.g., Rint, ECM, DFN) tuned with measured data permit pack‑level simulation; Batemo offers high‑precision digital twins for many cells.
- Recommended tests for designs: capacity vs C‑rate, internal resistance/impedance spectroscopy, thermal rise vs current, calendar/cycle aging at application C‑rates, abuse tests (overcharge, nail penetration per standards), and pack BMS integration tests.
Who is this battery FOR?
❌ Bad for:
- Vapes (Mech Mods): Technically safe (35A CDR), but the voltage sag under 30A+ load is higher than a dedicated "high discharge" cell like the Molicel P42A. The NCR21700T is energy-dense first, high-drain second.
- Cheap devices: Do not buy these for a $10 flashlight. The device won't utilize the power.
Comparative context (21700 ecosystem)
- Compared with smaller 18650 cells: 21700 format increases energy per cell and can simplify pack design (fewer cells in series/parallel for a given capacity).
- Compared with power‑oriented 21700 variants: power‑optimized cells (e.g., with lower internal resistance, thicker tabbing, different electrode microstructure) will deliver higher continuous currents but at lower gravimetric energy.
- For designs needing both high energy and significant power, parallel arrays of NCR21700T or hybrid packs mixing energy and power cells can be considered—with careful BMS and thermal design.
Lifecycle, aging mechanisms and mitigation
- Aging drivers: cycle count, depth of discharge, high SOC dwell, high temperature, and high C‑rates accelerate SEI growth, lithium plating, and electrode structural degradation.
- Mitigation: reduced max SOC, partial state‑of‑charge cycling, temperature control, gentler charge/discharge currents, and avoiding long dwell at high temperature extend usable life.
- End‑of‑life criteria: typical practice is 70–80% of original capacity as a conservative threshold for retirement or repurposing.
Resources and further reading
- Official Panasonic Energy product pages and datasheets for NCR‑series cells (primary authoritative source for limits and recommendations).
- Independent characterization services and databases (e.g., Batemo, teardown reports) for measured discharge/thermal behavior and cell models.
- Relevant standards: UN38.3 (transport), IEC 62133 (safety for portable batteries), UL standards for cells and battery packs.