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Custom Lithium Batteries for Underwater Thrusters: Reliable Power for Submersible Devices
PKNERGY’s custom Li-ion and LiFePO₄ packs deliver long runtime, safety, and reliable operation for underwater thrusters in ROVs and autonomous drones.
- Li-ion
- LiFePO₄
- Underwater Thruster
- Custom Pack
Introduction
Underwater thrusters power a wide range of submersible devices, from ROVs (Remotely Operated Vehicles) to autonomous underwater drones. Reliable battery performance is critical, as power failure underwater can lead to mission failure and high maintenance costs.
In this article, we cover: key battery requirements, underwater power management challenges, PKNERGY’s solutions, and a real-world case study.
Related pages:
LiFePO4 Battery ·
Custom Pack ·
Portable Power ·
Contact Us
Key Battery Requirements for Underwater Thrusters
1) High Capacity & Long Runtime
Submersible devices often operate for hours without recharge. High-capacity Li-ion or LiFePO₄ packs ensure extended runtime and stable voltage for propulsion efficiency.
2) Waterproof & Pressure-Resistant
IP68 housings with reinforced BMS protect against ingress and pressure at depth, enabling safe, reliable submersible operation.
3) Compact & Lightweight
Space is limited inside underwater drones. Custom packs maximize energy density while minimizing weight, maintaining buoyancy and maneuverability.
4) Wide Temperature & Environmental Resistance
LiFePO₄ offers wide temperature tolerance and stable output over thousands of cycles, ensuring reliable underwater performance.
Common Challenges in Underwater Propulsion Power
- Extended Operation: Missions require high energy density and fast turnaround charging.
- Pressure & Waterproofing: Deep-water conditions demand pressure-resistant housings and IP68 sealing with integrated BMS.
- Weight/Buoyancy Trade-offs: Packs must be compact and balanced for underwater dynamics.
PKNERGY’s Custom Battery Solutions
- Li-ion or LiFePO₄ packs tailored to voltage & capacity
- Integrated BMS for safety (over/under-voltage, current, temp); optional pressure monitoring
- IP68 waterproof & pressure-resistant housings for depth operations
- Compact, lightweight designs for optimal thruster performance
- 14.8 V 5000 mAh LiFePO₄ pack with IP68 casing
- 3–5 hours continuous propulsion for underwater drones
- >90% capacity retention over 2000+ cycles (typical)
Real-World Case Study
Client: European ROV manufacturer
Requirement: High-performance battery for underwater thrusters up to 30 m depth
PKNERGY Solution: Custom 4S LiFePO₄ 5000 mAh pack with integrated BMS and IP68 casing; lightweight & compact for drone integration
Result: 4–5 hours continuous operation, reliable performance under pressure and in saltwater, reduced maintenance and improved mission efficiency
How to Collaborate with PKNERGY ENERGY
- Requirement Analysis
- Custom Solution Design
- Prototype & Sample Testing
- Validation
- Mass Production
Why PKNERGY: 26 years of Li-ion/LiFePO₄ expertise, marine/underwater experience, and full export certifications.
Feature Comparison: Li-ion vs LiFePO₄ for Underwater Thrusters
| Feature | Li-ion (NMC/LCO) | LiFePO₄ |
|---|---|---|
| Energy Density | Higher | Moderate |
| Cycle Life | ~500–1000 | ~2000+ |
| Temperature Tolerance | Good | Wide window; stable |
| Safety | Needs strict protection | Safer cathode |
More:
LiFePO4 Battery ·
Custom Pack ·
Contact PKNERGY
FAQ
Q1: What is the MOQ?
Typically 50–5000 pcs depending on customization.
Q2: Lead time?
Samples ≈ 25 days; bulk ≈ 45–60 days.
Q3: Suitable for deep-water?
Yes. Packs are IP68 with pressure-resistant housings and are pressure-tested.
Contact Jennifer — PKNERGY
Custom Battery Solutions for Underwater Thrusters
- Email: sale3@pknergy.com
- Website: pknergybattery.com/contact
