Panasonic Ncr21700t Datasheet Online

Panasonic NCR21700T — Comprehensive Survey

Executive summary

The Panasonic NCR21700T is a high-capacity 21700-format lithium‑ion cylindrical cell marketed for high‑energy applications that require long run time and reasonable discharge capability. With a nominal voltage around 3.6–3.7 V and a published nominal capacity near 5,000 mAh, the cell represents a class of large-format cylindrical Ni‑rich/NC‑based (NCR-series) chemistries optimized for energy density rather than maximum continuous current. This treatise surveys its specification envelope, internal design and materials implications, electrical and thermal behavior, typical applications, performance tradeoffs, lifecycle and safety considerations, testing and modeling resources, supply/market context, and practical guidance for designers and end users.

Dimensions: Approximately 21.35mm (diameter) by 70.3mm (height). Weight: Maximum 65.0g. panasonic ncr21700t datasheet

❌ 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.

Review: Panasonic NCR21700T Datasheet

Bottom Line Up Front: The NCR21700T is a high-capacity, moderate-drain cell, not a high-power one. The datasheet reveals a battery designed for energy density (laptops, power banks, backup storage) rather than demanding power tool or high-performance EV applications. Vapes (Mech Mods): Technically safe (35A CDR), but

• Overvoltage protection (4.25V cut)
• Undervoltage protection (2.5V cut)
• Overcurrent protection (20A typical)
• Temperature monitoring (cut at 70°C case temperature)

If you want, I can:

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.

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  Review: Panasonic NCR21700T Datasheet Bottom Line Up Front:

Chemistry and cell construction (implications)

• Family: Panasonic “NCR” designation implies nickel‑cobalt‑aluminum (NCA) or nickel‑cobalt‑manganese‑rich layered oxide variants optimized for energy density; NCR cells historically prioritize capacity and energy per volume/weight.
• Electrode design: larger active material loading, thinner separators relative to power‑optimized cells, and higher electrode coating density produce higher gravimetric/volumetric energy but increase internal resistance rise at high currents and charge/discharge stress.
• Electrolyte and additives: formulated for cycle stability and SEI formation; thermal runaway thresholds depend on electrolyte composition and electrode decomposition characteristics.
• No internal protection: 21700 cells like the NCR21700T are generally unprotected single cells — they rely on external BMS/protection circuits in battery packs.