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GANDY 72V40ah Battery - 1688

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GANDY 72V40ah Battery

Here’s a detailed breakdown of a 72V 40Ah battery system, covering its specifications, performance, applications, and key considerations:


1. Voltage (72V)

  • Higher voltage than 48V/60V systems, common in performance-oriented electric vehicles (e.g., e-motorcycles, high-power scooters, or custom EVs).

  • Advantages:

    • More efficient power delivery (less current for the same wattage = reduced heat loss).

    • Enables higher top speeds and acceleration.


2. Capacity (40Ah)

  • Amp-hours (Ah) = Charge capacity.

    • Can deliver 40A for 1 hour20A for 2 hours, etc.

  • Combines with voltage to determine total energy storage.


3. Energy (Watt-hours, Wh)

  • Calculation:

    72�×40�ℎ=2,880�ℎ( 2.88 kWh)

  • Context:

    • Equivalent to running a 1,000W appliance for 2.88 hours.

    • For EVs, this translates to longer range or higher power output.


4. Range Estimation (for EVs)

  • Depends on motor power:

    • Example 1: 3,000W (72V × ~42A) e-motorcycle:

      2,880�ℎ3,000�=0.96 hours( 58 mins at full throttle)

      At 80 km/h (50 mph), theoretical range ≈ 77 km (48 miles).

    • Example 2: 1,500W scooter: ~120–150 km (75–93 miles) under conservative riding.

  • Real-world range: 30–50% less due to hills, wind, and battery inefficiencies.


5. Battery Type

  • Lithium-ion (Li-ion/LiFePO4):

    • Preferred for high-power apps (lightweight, 2,000+ cycles).

    • Weight: ~20–25 kg (44–55 lbs).

  • Lead-acid:

    • Rare for 72V 40Ah (extremely heavy: ~50–60 kg / 110–132 lbs).


6. Charging Time

  • Standard 5A charger:

    40�ℎ5�=8 hours.

  • Fast charging (10A): ~4 hours (may reduce battery lifespan).


7. Applications

  • High-performance EVs: E-motorcycles, electric dirt bikes, or custom builds.

  • Commercial/Utility: Heavy-duty scooters, small electric cars, or industrial equipment.

  • Solar storage: Off-grid systems needing high voltage.


8. Price Range

  • Lithium-ion: $350–$500 (depends on cell quality, BMS, brand).

  • Lead-acid: $200–$350 (bulky and short-lived).


9. Key Considerations

  • Motor/Controller Compatibility: Ensure your system supports 72V.

  • Battery Management System (BMS): Critical for safety and longevity.

  • Regulations: Some regions restrict high-voltage EVs on public roads.


Comparison with 48V 40Ah

Feature 72V 40Ah 48V 40Ah
Energy 2,880Wh 1,920Wh
Power Higher speed/torque Moderate performance
Weight Slightly heavier Lighter
Cost More expensive More affordable

Need Help?

Let me know if you’d like:

  • A range estimate for your specific motor.

  • Advice on battery chemistry (Li-ion vs. LiFePO4).

  • Wiring/configuration tips for 72V systems

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