Panasonic Ncr21700t Datasheet

The Panasonic NCR21700T is a high-capacity, high-discharge lithium-ion cell in the 21700 form factor (21mm diameter, 70mm height). It is widely recognized for its use in demanding applications like electric vehicles (notably Tesla Model 3 packs), power tools, and high-performance drones. Core Specifications Summary

These specifications are based on general industry datasheets for the NCR21700T model. Feature Specification Nominal Capacity 4800mAh – 5000mAh Nominal Voltage 3.6V – 3.7V Standard Charge Voltage Discharge Cut-off Voltage Continuous Discharge Current 15A – 30A (varies by source/testing) Peak Discharge Current Cycle Life >1,000 cycles Approximate Weight 65g – 70g Key Characteristics NCR21700 data sheet

Dimensions

Diameter: Max 21.1 mm. This tight tolerance is vital for insertion into battery holders or welding fixtures.
Height: Max 70.3 mm. This includes the positive terminal button top. If using flat-top cells for spot welding, the height may be slightly reduced.
Positive Terminal: Usually a button top design, distinct from flat-top cells used in custom pack building. Designers must ensure the positive contact recess is deep enough to prevent accidental shorting against the can.

❌ 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.

3. Weaknesses / Hidden Limitations

Misleading “Max Discharge”: 9.6A continuous sounds decent, but many 21700 cells (Samsung 40T, Molicel P42A) do 30–45A. Do not use this cell for vaping, power tools, e-bikes, or drones – you will get voltage sag and overheating.
Poor High-Current Performance: At 9.6A (2C), voltage will drop from 3.6V to ~3.0V quickly. Effective capacity at 10A is closer to 4000–4200 mAh (not stated in datasheet, but typical for NCR chemistry).
Slow Charging: 3.2A max = ~1.5 hours to charge from empty. Modern high-energy 21700s (e.g., Samsung 50E) allow 4.9A charge.
Missing Graphs (in many public versions): The full datasheet often lacks temperature rise vs current, cycle life at different temps, or pulse discharge curves. You’ll need to test or find third-party data.

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.

5.1 Safety Features

Panasonic integrates standard safety mechanisms into the NCR21700T:

Internal Pressure Valve (PTC): Protects against excessive current by increasing resistance as temperature rises.
CID (Current Interrupt Device): Disconnects the electrode if internal pressure exceeds safe limits (usually triggered by overcharging or overheating).
Shutdown Separator: Polyethylene separator melts to block ion flow if temperature spikes, preventing thermal runaway.

Panasonic NCR21700T — Datasheet Overview and Key Points

The Panasonic NCR21700T is a high-capacity 21700-format lithium-ion cell commonly used in energy storage, e-bikes, power tools, and high-capacity battery packs. Below is a concise, shareable post summarizing its datasheet specifications, performance characteristics, and usage considerations.

Where to find the full datasheet

For exact ratings (pulse current, internal resistance, detailed charge/discharge curves, temperature ranges, mechanical tolerances, and safety test results), download the official Panasonic NCR21700T datasheet from Panasonic’s technical documentation or authorized distributors. panasonic ncr21700t datasheet

— End of post

(Note: Related search terms prepared.)

An analysis of the Panasonic NCR21700T is less about a simple cylinder of metal and more about the "quiet revolution" of the energy sector. This specific cell, often described as a modified version of the batteries powering high-performance electric vehicles, represents the peak of modern energy density and power delivery. The Anatomy of Power: Key Specifications NCR21700 data sheet

outlines a powerhouse designed for "Mobility" and "Social Infrastructure": , with a typical reach of Dimensions

. This is roughly 40% more than the maximum capacity of the older 18650 standard. Voltage Range: Operates at a 3.6V nominal voltage , with a charging peak of . It is critical to never discharge below to avoid permanent internal damage. Energy Density: It packs a punch with (volumetric) and

(gravimetric). In simpler terms, it provides more energy per gram than almost any consumer cell of its time. Physical Footprint:

At 21mm in diameter and 70mm in height, it is slightly larger than an 18650 but offers a significantly better ratio of weight to power. The Essay: The Silicon-Anode Frontier

The "T" in NCR21700T is often associated with cells that feature Panasonic’s high-power engineering, frequently seen in advanced electric vehicle packs Diameter: Max 21

. This cell isn't just a battery; it’s a solution to the "range anxiety" that haunted the early 2010s. Products for Business - Panasonic Energy Co., Ltd.

Panasonic NCR21700T is a high-capacity lithium-ion cell in the 21700 form factor, often associated with high-performance electric vehicle (EV) applications and energy storage systems. While the "T" suffix is frequently used in secondary markets (often appearing as rewrapped or salvaged Tesla Model 3/Y cells), the core performance closely aligns with the official specifications. ⚡ Key Specifications Typical Capacity Minimum Capacity 4800 - 4900 mAh Nominal Voltage 3.6V - 3.7V Charge Voltage 4.2V ± 0.05V Discharge Cut-off Max Continuous Discharge 10A - 15A (standard); up to 30A (burst/high-drain) ~65.0g - 70.0g 📐 Physical Dimensions 21.1 mm (max 21.35 mm with tube) 70.3 mm (max 70.5 mm) Terminal Style: Flat top (typically unprotected) Промелектроніка 🌡️ Operating Temperatures 10°C to 45°C Discharge: -20°C to 60°C -20°C to 50°C Промелектроніка 🚀 Performance Features High Energy Density:

Optimized for gravimetric density (~263 Wh/kg), providing more runtime for its weight than standard 18650s. Stable Discharge:

Maintains a flat discharge curve, ensuring consistent power output throughout the cycle. Industrial Heritage:

Developed in partnership with Tesla for long-range EV packs; known for high reliability in massive multi-cell configurations. Промелектроніка Промелектроніка