Company News

SunPower Launches 21700-50S High-Rate Lithium Battery Cell: 2C Fast Charging, 10C High Discharge, and 8mΩ Ultra-Low Internal Resistance

Core Parameter Breakthroughs: Exceeding Imported Alternatives

  • Basic Specifications:
    • 21700 cylindrical cell
    • Nominal capacity: 5000mAh
    • Nominal voltage: 3.6V
    • Energy density: 18Wh
    • Fully compatible with existing 21700 assembly structures, no mold adjustments needed.
  • Charging and Discharging Performance (Core Highlights):
    • 2C Fast Charging: Exceeds the standard 1C charging rate, reducing charging time significantly. Ideal for high-frequency, emergency power needs.
    • 10C Continuous High Discharge Rate: Peak power performance with no voltage drop, addressing high-load devices’ power demands effectively.
  • Key Performance Advantages:
    • Ultra-Low Internal Resistance (8mΩ): Industry-leading, reducing charge/discharge losses and significantly improving energy efficiency.
    • Enhanced Temperature Control: Under identical conditions, temperature rise is 5°C lower than the Samsung 21700-50S, ensuring better safety and stability in high-current operations and preventing overheating.

All-Scenario Compatibility: Perfectly Suited for Core Application Needs

  1. FPV Drone Sector (Core Adaptation):
    • The 10C high discharge rate matches explosive acceleration and rapid throttle changes for racing drones.
    • Low internal resistance and minimal temperature rise ensure stable voltage output during high-intensity flights.
    • 5000mAh capacity offers a balance of endurance and power, making it the optimal domestic alternative for:
      • 5-7 inch racing quads
      • Vertical take-off fixed-wing drones
      • Heavy-duty UAVs
    • Perfect for bulk procurement in FPV markets, including Ukraine and Europe.
  2. High-End Power Banks:
    • 2C fast charging reduces charging time significantly for power banks.
    • 8mΩ ultra-low internal resistance minimizes losses, enhancing energy efficiency.
    • Reduced temperature rise solves heating issues in high-power fast-charging power banks, making it ideal for:
      • Outdoor portable power banks
      • Multi-device emergency charging.
  3. BBU Communication Backup Power:
    • Low internal resistance ensures stable voltage during high-current discharge.
    • Low temperature rise makes it perfect for long-term use in base stations, with superior cycle life, reducing maintenance costs for communication backup systems.
    • Suitable for:
      • 5G base stations
      • Data centers.
  4. High-Speed Electric Motorcycles:
    • 10C high discharge rate meets the demands for quick acceleration and startup of electric motorcycles.
    • 2C fast charging alleviates range anxiety.
    • Low temperature rise and high safety features ensure performance under outdoor conditions.
    • Ideal for:
      • High-speed two-wheeled electric motorcycles
      • Lightweight three-wheeled electric motorcycles.

Product Core Competitiveness Summary

  • Performance Upgrade: Surpasses the Samsung 21700-50S with breakthroughs in charge/discharge rates, internal resistance, and temperature rise.
  • Cost Advantage: Lower cost compared to imported cells, boosting cost-efficiency for end products.
  • All-Scenario Compatibility: Standard 21700 size, no new mold required, quick adaptation to existing assembly lines for power banks, FPV drones, communication backup, and electric motorcycles.
  • Safety and Reliability: Dual protection of low internal resistance and low temperature rise for greater stability under high current operations, minimizing safety risks.