Full-Tab Cylindrical Lithium-Ion Batteries

MINDWAY Full-Tab Cylindrical Lithium-Ion Batteries: 21700 & 46950 Cells for High-Performance Applications

 

Executive Summary

The global shift toward electrification in electric vehicles (EVs), electric aviation (eVTOL), and renewable energy storage systems demands batteries with higher energy density, lower resistance, faster charging, and safer performance.

MINDWAY’s full-tab cylindrical lithium-ion batteries — the 21700 lithium-ion cell  and the 46950 cylindrical cell — are engineered to meet these challenges. By leveraging full-tab technology, these cells deliver high discharge rates, superior thermal stability, and long cycle life, setting a new benchmark for advanced cylindrical battery solutions.

 1. Full-Tab Cylindrical Battery Technology

Conventional cylindrical cells rely on single-tab electrode connections, which create bottlenecks in current flow, raising internal resistance and generating heat.

MINDWAY’s full-tab cylindrical battery design eliminates these limitations:

· Low internal resistance: ≤4 mΩ (21700) and ≤1.0 mΩ AC (46950)

· Improved thermal management: uniform current distribution reduces localized heating

· High discharge rates: continuous 40A (21700) and 185A (46950)

· Enhanced safety & cycle life: stable performance across hundreds of cycles

This makes MINDWAY cylindrical lithium-ion batteries ideal for demanding EV, eVTOL, and industrial applications.

 2. Technical Specifications of MINDWAY Full-Tab Cylindrical Cells

Table 1. MINDWAY 21700 Lithium-Ion Cell

Parameter	Specification
Nominal Capacity	5000 mAh (min 4950 mAh)
Nominal Voltage	3.6 V
Max Continuous Discharge	40A (90A with thermal cut-off)
Pulse Discharge	140A (3s)
Max Charge Current	15A
Internal Impedance	≤4 mΩ
Operating Temp.	Charge: 0~45°C; Discharge: -20~60°C
Cycle Life	≥500 cycles @ 60% capacity retention
Dimensions	Ø ≤21.5 mm × H ≤70.5 mm
Weight	≤75 g

Key Benefits: High power density, low impedance, ideal for compact EV packs, drones, robotics, and power tools.

 Table 2. MINDWAY 46950 Cylindrical Cell

Parameter	Specification
Nominal Capacity	37.0–38.0 Ah
Nominal Voltage	3.53 V
Max Continuous Discharge	5C ≈ 185A
Max Pulse Discharge	8C ≈ 296A (30s)
Max Continuous Charge	4C ≈ 148A
Internal Resistance	≤1.0 mΩ (AC); ≤3.0 mΩ (DC)
Operating Temp.	Charge: 0~45°C; Discharge: -20~55°C
Cycle Life	≥1000 cycles @ 70% capacity retention
Dimensions	Ø 46.35 ±0.30 mm × H 95 ±0.3 mm
Weight	~400 g

Key Benefits: Ultra-high capacity, powerful discharge capability, optimized for electric aviation, commercial EV battery packs, and renewable energy storage systems.

 3. Performance Comparison of 21700 vs. 46950 Cylindrical Batteries

Feature	21700 Lithium-Ion Cell	46950 Cylindrical Cell
Application	Compact, high-power devices	Large-scale EV, eVTOL, ESS
Capacity	5 Ah	37–38 Ah
Energy per Cell	~18 Wh	~130 Wh
Max Continuous Power	144 W	653 W
Pulse Power	~500 W	>1000 W
Energy Density	~240 Wh/kg	~325 Wh/kg
Cycle Life	500 cycles	1000 cycles

 4. Application Scenarios

MINDWAY’s cylindrical lithium-ion batteries are engineered for diverse industries:

· 21700 Full-Tab Lithium-Ion Cell:
Compact applications demanding high discharge rates and fast charging, including electric scooters, drones, robotics, power tools, and portable energy storage devices.

· 46950 Full-Tab Cylindrical Battery:
Large-scale and mission-critical systems such as eVTOL aircraft, commercial electric vehicles, marine propulsion, and renewable energy storage systems (ESS).

 5. Safety & Reliability Testing

MINDWAY batteries comply with UN38.3, IEC 62133, and aviation-grade safety standards. Tests include:

· Overcharge and over-discharge

· Short-circuit and crush tests

· Thermal abuse (130°C heating)

· Vibration, drop, and low-pressure tests

Result: No fire, no explosion — ensuring maximum safety for critical applications.

 6. Conclusion

MINDWAY’s full-tab cylindrical lithium-ion cells deliver the ideal balance of energy density, high discharge capability, and safety.

· The 21700 full-tab battery is optimized for compact high-power devices.

· The 46950 cylindrical cell is designed for aviation, EV, and grid-scale energy storage.

With advanced full-tab technology, MINDWAY provides the next generation of cylindrical batteries that empower industries to build faster, safer, and more reliable energy systems.

MINDWAY Cylindrical Lithium-Ion Batteries – Power Beyond Limits.