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EVE INR21700/50PL 5000mAh 50A Tabless High-Drain Lithium-ion Cell for Advanced Power Tools
Product Overview
The EVE INR21700/50PL is a cutting-edge, industrial-grade 21700 cylindrical rechargeable lithium-ion cell designed and manufactured by EVE Energy Co., Ltd. for high-performance civil hardware networks. Utilizing advanced tabless (全极耳) structural layout, this cell achieves an ultra-low ex-factory AC internal resistance of ≤ 5mΩ. This design optimizes electron pathways and dramatically suppresses heat build-up under extreme thermal and mechanical strain.
Featuring a robust 3.60V nominal voltage and massive 5000mAh standard capacity, the 50PL delivers an astonishing 50A (10C) maximum continuous discharge current (with recommended 75°C temperature cut-off and 80°C maximum hardware protection threshold). It supports ultra-fast charging capabilities up to 10A (2.0C) and offers resilient power delivery across tough professional operational profiles. It stands as a premium power solution for heavy-duty electric power tools, professional garden machinery, and industrial automation electronics.
Technical Specifications
Item
Specification
Manufacturer
EVE Energy Co., Ltd.
Model Name
INR21700/50PL
Product Spec Number
PBRI-INR21700/50PL-D06-01 (Version B)
Nominal Capacity
5000mAh (Standard 0.2C discharge @ 25±2°C)
Minimum Capacity
2900mAh (Minimum base limit)
Nominal Voltage
3.60V
Standard Charge Current
2.5A (0.5C) CC-CV to 4.20±0.05V, 0.1A (0.02C) cut-off @ 25°C
Maximum Charge Current
10.0A (2.0C) CC-CV to 4.20±0.05V, 0.1A cut-off @ 25°C
Standard Discharge Current
1.0A (0.2C) CC down to 2.50V cut-off
Max. Continuous Discharge
50A (10C) down to 2.50V cut-off (Recommended 75°C cut, Max 80°C cut)
Operating Voltage Range
2.50V ~ 4.20V
Cell Weight
Maximum 72.0g
Cell Dimensions (w/ Tube)
Height: 70.15 ± 0.15 mm | Diameter: 21.15 ± 0.10 mm
Ambient Operating Temp
Charge: 0 to 45°C | Discharge: -20 to 60°C
Cell Surface Operating Temp
Charge: 0 to 60°C (release below 45°C) | Discharge: -20 to 80°C (release below 60°C)
Ex-factory Shipping State
Voltage: 3.450V ~ 3.600V
Storage Temp (Shipping SOC)
1 Year: -20 to 25°C | 3 Months: -20 to 45°C | 1 Month: -20 to 60°C
Key Performance & Advantages
Advanced Tabless Technology: Features an ultra-low internal resistance profile (≤ 5mΩ), lowering energy loss and minimizing surface temperature spikes during high-rate discharge runs.
High Discharge Rate Capabilities: Retains a stable discharge plateau across high-current outputs at 25°C, providing outstanding rate efficiency (95% relative capacity at 30A; over 95% at 40A compared to a 10A baseline).
Extended Industrial Cycle Life: Engineered to survive demanding workloads, maintaining ≥ 60% of its initial capacity after 400 aggressive cycles under a high-stress 10A (2C) charge and 40A (8C) discharge profile.
Solid Low-Temperature Capacity: Delivers excellent efficiency across cold-weather job sites, retaining ≥ 60% relative capacity at -20°C, ≥ 75% at -10°C, and 80% at 0°C under a 12.5A (2.5C) heavy discharge load.
Excellent Storage & Recovery: Retains strong chemical stability, achieving a capacity recovery of ≥ 90% of its standard discharge capacity after being stored at a fully charged state at 60°C for 30 consecutive days.
Verified Structural Safety Compliance: Successfully fulfills rigorous environmental and safety test matrixes without fire or explosion risks, including 1.0m concrete drop tests, UN38.3 vibration and low pressure tests, and comprehensive safety validations.
Core Applications
Industrial & Professional Power Tools: High-torque impact drivers, heavy-duty hammer drills, cordless circular saws, and industrial angle grinders.
Commercial Outdoor Garden Equipment: Professional cordless lawnmowers, heavy-duty chainsaws, weed trimmers, and high-velocity leaf blowers.
Custom Battery Packs & Robotics: High-output custom multi-series packs for Automated Guided Vehicles (AGVs), warehouse robotics, and light e-mobility infrastructure.
Critical Safety Instructions & Usage Notice
System Protection Mandate: The cell must be assembled with a dedicated Battery Management System (BMS) or safety circuit board. The host system must monitor each cell block voltage independently to prevent imbalances.
Discharge Cut-off Guard: Never allow the cell voltage to drop below the 2.50V safety limit. System protection must automatically trip when reaching 2.50V to avoid catastrophic over-discharge.
Charging Constraints: Do not exceed the maximum charge voltage of 4.20±0.05V or maximum current of 10.0A. Inverse or reverse charging is strictly prohibited as it can permanently damage the cell.
Physical Pack Assembly Handling: Direct soldering onto the cell body is strictly prohibited; cells must be connected using spot-welded nickel strips onto the terminal caps to prevent thermal separator damage.
Handling & Disassembly Precautions: Do not dismantle, puncture, crush, or incinerate the cell. If electrolyte leakage is detected or a pungent odor is present, discard the cell immediately.
Long-Term Storage Management: For storage extending beyond 3 months, it is strongly recommended to store cells at a low-temperature range (0 ~ 25°C) in a dry, non-corrosive environment.
