Panasonic Ncr21700t Datasheet Fix

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

. 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: panasonic ncr21700t datasheet

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

. 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. An analysis of the Panasonic NCR21700T is less

1. Key Specifications at a Glance (from the Datasheet)

Before diving into complex charts, here are the headline specifications as listed in the Panasonic NCR21700T technical datasheet:

| Parameter | Value | |-----------|-------| | Model | NCR21700T | | Nominal Voltage | 3.6 V (3.7 V typical in some revisions) | | Typical Capacity | 5,000 mAh (0.2C discharge, 25°C) | | Minimum Capacity | 4,900 mAh | | Nominal Energy | 18.0 Wh | | Standard Charge Current | 1.5 A (0.3C) | | Max Continuous Discharge Current | 15 A (Note: some datasheets list 12.5A at 80°C cutoff) | | Max Discharge (Pulse) | 30 A (< 5 seconds) | | Internal Impedance (AC, 1kHz) | ≤ 30 mΩ (typical ~20 mΩ) | | Charge Voltage (CC/CV) | 4.20 V ± 0.03 V | | Cut-off Discharge Voltage | 2.50 V | | Cycle Life | ≥ 500 cycles (to 70% of initial capacity at 0.5C/0.5C) | | Weight | 69 g (max) | | Operating Temperature (Discharge) | -20°C to +60°C | | Operating Temperature (Charge) | 0°C to +45°C |

These numbers confirm the NCR21700T as a high-capacity, medium-drain cell. It is not a “high current” cell like the Samsung 40T (35A), but it excels in applications requiring long runtime with moderate power bursts. preventing thermal runaway.

2.1. Capacity (5000 mAh nominal)

The 5,000 mAh rating is industry-leading for 21700 cells available to the public. At 0.2C (1,000 mA) discharge to 2.5V at 25°C, a fresh cell will deliver at least 5,000 mAh. However, at higher drain (e.g., 10A), expect capacity to drop to ~4,600–4,700 mAh due to internal resistance losses. The datasheet’s “minimum capacity” of 4,900 mAh ensures consistency across production batches.

5.1 Safety Features

Panasonic integrates standard safety mechanisms into the NCR21700T:

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