UAV Battery Systems

In the modernization of agriculture, agricultural drones have become key field equipment due to their efficient and precise operation. Their power core—lithium polymer (Li-polymer) batteries—supports complex spraying tasks with high energy density, lightweight design, and safety performance.

1. Lithium Polymer Batteries: The Energy Core of Agricultural Drones

Lithium polymer batteries use polymer electrolytes and aluminum-plastic film pouch packaging, achieving energy densities of 200–260 Wh/kg. A 6S pouch battery can reach 22000 mAh capacity, supporting over 30 minutes of flight for medium-to-large agricultural drones, covering 20–30 mu of farmland per operation. Spraying tasks require frequent starts, stops, and attitude adjustments, demanding 5C+ continuous discharge capability; an 18S/30Ah solution can deliver 150 A at 5C discharge, ensuring stable flight with full pesticide loads.

2. Performance Advantages

2.1 Low-Temperature Adaptability

Agricultural operations often face early morning low temperatures, where traditional lithium batteries experience significant capacity loss below 5°C. With optimized electrolyte formulations, the operating temperature range extends to -20°C, and preheating devices enable operation in extreme cold regions.

2.2 Cycle Life

Agricultural drones typically undergo 2–3 charge/discharge cycles per day, making battery life critical to operational costs. At 70% depth of discharge, high-quality cells can achieve over 1000 cycles, while LiFePO4 systems further reduce per-operation battery costs.

2.3 Intelligent Safety Protection

Modern agricultural batteries integrate BMS for real-time voltage and temperature monitoring. In cases of overcharge (>4.35 V/cell), overdischarge (<2.8 V/cell), or short circuits, the system cuts off the circuit within 0.1 seconds and supports self-recovery protection to minimize operation interruptions.

3. Usage and Maintenance Recommendations

3.1 Shallow Charge and Discharge

It is recommended to keep daily usage between 20%–80% charge to significantly extend cycle life.

3.2 Temperature Management

Charging ambient temperature should be maintained at 0–40°C; preheating to above 20°C before low-temperature operations improves capacity recovery.

3.3 Dedicated Maintenance

Use a balance charger to maintain consistent cell voltages; store at 40%–60% charge for long-term storage, and perform a charge/discharge cycle every 3 months.

3.4 Transport Protection

Use explosion-proof cases to secure batteries during transport, avoiding compression or impact that could cause internal short circuits.

4. Industry Applications

Agricultural drone battery solutions have been deployed in large-scale farms, supporting operational models such as battery leasing and trade-ins to reduce total equipment costs. Combined with battery health data, predictive maintenance can be achieved, minimizing unplanned downtime.