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Samsung 21700 50G Battery Specifications

Samsung 21700 50G

High-capacity Lithium-ion Battery Cell

Model INR21700-50G
Nominal Capacity 5000 mAh (0.2C discharge)
Minimum Capacity 4850 mAh
Nominal Voltage 3.6V
Charge Voltage 4.2V ± 0.05V
Discharge Cut-off Voltage 2.5V
Standard Charge Current 0.5C (approx. 2500mA)
Rapid Charge Current 1.0C (approx. 5000mA)
Max Continuous Discharge 9.8A
Max Pulse Discharge 14.7A (less than 10s)
Internal Resistance ≤ 18 mΩ
Weight Approx. 69g
Dimensions 21.2 ± 0.2 mm (diameter)
70.3 ± 0.3 mm (height)
Cycle Life > 500 cycles (at 70% capacity retention)
BMS intelligent BMS intelligent
Intelligent BMS Features

Intelligent BMS

Battery Management System

The intelligent BMS (Battery Management System) provides users with unprecedented transparency and control over battery status through its companion mobile app and Bluetooth connectivity.

Core Status Real-Time Monitoring

At-a-glance overview:

The app's home screen clearly displays critical information such as State of Charge (SOC), State of Health (SOH), voltage, current, and temperature, keeping users informed about battery status.

Detailed Data & Historical Records

In-depth metrics:

View granular parameters like voltage and temperature for each individual cell, enabling precise assessment of pack consistency.

Historical tracking:

Access charge/discharge cycle logs to analyze usage patterns and performance trends over time.

Smart Alerts & Safety Protection

Proactive Alerts:

Immediately triggers pop-up notifications for anomalies like overvoltage, undervoltage, overcurrent, high temperature, or low temperature, enabling early risk prevention and ensuring safety.

Customizable Key Parameters

User Customization:

Advanced users can flexibly configure critical parameters like charge cut-off voltage, discharge cut-off voltage, and charge current to better adapt to different devices or usage scenarios.

Surveillance Bluetooth Surveillance Bluetooth
Inspection Bluetooth
Utilisez la surveillance Bluetooth via une application pour smartphone pour évaluer l’état de santé et les performances en temps réel de plusieurs batteries.
Affichage LED Affichage LED
AFFICHAGE LED
Système d'affichage LED pour surveiller la tension de la batterie, la capacité restante et l'état de charge en temps réel.
CHARGEUR INTELLIGENT CHARGEUR INTELLIGENT
84V 5A Smart Charger Features

84V 5A Smart Fast Charger

Designed for 72V 30AH Lithium Battery Packs

Intelligent Charging Algorithm

  • Automatic multi-stage charging (Pre-charge, CC, CV, Float)
  • Microprocessor-controlled precision charging
  • Auto-shutdown and sleep mode when charging complete
  • Temperature-compensated voltage regulation

🔒 Comprehensive Safety Protection

  • Over-Current Protection (OCP) and Over-Voltage Protection (OVP)
  • Short-Circuit Protection with auto-recovery
  • Reverse Polarity Protection - prevents damage if connected incorrectly
  • Over-Temperature Protection - reduces power or shuts down if overheated
  • Spark-proof connection technology

🛡️ Build Quality & Design

  • Durable aluminum housing with efficient cooling system
  • IP54 rated dust-proof and water-resistant design
  • Flame-retardant materials (UL94 V-0 rated)
  • Industrial-grade components for long service life
  • Compact and portable design

Technical Specifications

Input Voltage: AC 100-240V, 50/60Hz
Output Voltage: 84V DC
Output Current: 5A DC
Charging Time (0-100%): 6.5 - 7.5 hours
Compatibility: 72V Li-ion Battery Packs

📊 User Interface & Indicators

  • Multi-color LED status indicators (Red-Charging, Green-Complete)
  • Fault code display for troubleshooting
  • Silent operation with low-noise fan technology
  • Plug-and-play operation with no complex settings
protection importante protection importante
Sauvegarde fondamentale
Résistance à l'eau IP65 : équipé d'un boîtier en métal moulé scellé à l'intérieur et d'un produit d'étanchéité protecteur pour bloquer l'intrusion d'eau de pluie, garantissant des performances d'étanchéité. Conception anti-impact : renforcée par une coque métallique de 1,5 mm d'épaisseur pour atténuer les dommages potentiels de la batterie causés par les collisions.
72V 30AH 2160Wh High-Performance Battery

72V 30AH 2160Wh High-Performance Battery Range

This battery delivers high-performance power support for electric vehicles and portable applications. Note: Specifications are for reference only. Actual performance may vary based on usage environment, load, and configuration differences.

2H

Riding time of e-bike
(72V 1000W motor)

80KM

Riding mileage of e-bike
(Riding speed 50km/h)

6H

Charging time of battery
(Using 5A fast charger)

Discharge Plug Options

Need a custom plug option? Please reach out to our customer service team.

QS8 Discharge Plug

QS8

Anderson Discharge Plug

Anderson

Wire Only Option

Wire Only

XT90F/M Discharge Plug

XT90F/M

XT60F/M Discharge Plug

XT60F/M

Small Anderson Discharge Plug

Small Anderson

Charger Power Cables

Appropriate charger AC power cables for different countries/regions

US Power Cable

US (Default)

EU Power Cable

EU

AU Power Cable

AU

UK Power Cable

UK

Battery Power Solutions | High Performance 2160Wh Battery System

Battery Specifications

Battery Specifications

72V 30AH Lithium-ion Battery Technical Parameters

Basic Parameters

  • Battery Model: 72V 30AH
  • Battery Type: Lithium-ion rechargeable battery
  • Production Process: 20S 6P
  • Standard Voltage: 72V
  • Battery Capacity: 30AH
  • Dimensions: 275×180×140mm (Metal Casing)
  • Weight: Approx. 12KG

Cell Parameters

  • Cell Brand: SAMSUNG
  • Cell Model: INR21700-50G
  • Cell Type: Lithium-ion rechargeable
  • Nominal Voltage: 3.6V
  • Nominal Capacity: 5000mAh
  • Max Continuous Discharge:
    • 9.8A (Continuous Discharge ~2C)
    • 15A (Peak Discharge)
  • Charge Cut-off Voltage: 5A, 4.20V, CCCV 100mA cut-off
  • Discharge Cut-off Voltage: 15A, 2.5V cut-off

BMS Specifications

  • BMS Brand: JBD/ANT/JK
  • Selection Criteria: Based on discharge current, dimensions, or customer requirements
  • Installation: Built into the battery pack
  • Communication: Bluetooth and WiFi
  • Compatibility: iOS and Android systems
  • Functions: Real-time monitoring, remote control
  • Optional Extensions: CAN BUS/RS485/GPS (Customizable)

Battery Pack Performance

  • Charge Cut-off Voltage: 84V (Full charge state, charging stops)
  • Discharge Cut-off Voltage: 50V (Automatic protection activates)
  • Rated Discharge Current: Calculated based on motor power
  • Continuous Discharge Current: Determined by BMS current rating
  • Peak Discharge Current: Determined by motor power and BMS peak current capacity

Charger Specifications

  • Input Voltage: Universal 110V~240V (Worldwide compatibility)
  • Output Current: Standard 84V 5A
  • Charging Method: Constant Current & Voltage (CC & CV)
  • Charging Time: 80% in 5 hours, Full charge in 6-7 hours
  • Plug Options: Country-specific cords (US/EU/UK/AU)

Temperature Specifications

  • Battery Operating Temperature:
    • Charging: 0 to 60℃ (Recommended < 45℃)
    • Discharging: -20 to 60℃ (Must maintain < 60℃)
  • Charger Operating Temperature: 0 to 60℃ (Recommended < 45℃ during charging)

Important Notes & Recommendations

State of Charge (SOC)

  • Optimal: Maintain 40-60% (3.7-3.8V per cell)
  • Prohibited: Long-term storage at <10% or 100% SOC (accelerates aging)

Temperature Control

  • 15-25°C: Ideal environment (<2% annual degradation)
  • -20~45°C: Permissible range (requires SOC control)
  • 50°C or <-30°C: Strictly prohibited (hazard risk)

Physical Protection & Recommendations

  • Avoid compression/impact (even with ABS casing)
  • Keep away from metal objects to prevent short circuits
  • For long-term storage (>1 month), perform periodic brief charge/discharge cycles
  • Recommend shallow cycles (30%→80%) every 3 months