1. Introduction

Underwater sensor networks are essential for marine research, offshore exploration, and environmental monitoring. These systems operate in high-pressure, low-temperature, and corrosive seawater environments, demanding batteries that are both durable and safe.

Semi-solid lithium batteries have emerged as an advanced alternative to traditional lithium-ion batteries, overcoming limitations in sealing, safety, and endurance. PKNERGY provides custom semi-solid lithium battery packs engineered to meet the extreme demands of marine IoT systems.

2. Application Background

Underwater sensor nodes are critical for marine IoT networks, supporting:

• Ocean current and temperature monitoring
• Pipeline leakage detection
• Underwater acoustic communication
• Seabed mapping and exploration

These systems typically operate at depths of several hundred meters, requiring long lifespan (3–5 years), waterproof sealing, and stable discharge under variable temperatures.

Semi-solid lithium technology, featuring gel-like electrolytes, offers improved pressure resistance, safety, and chemical stability — making it ideal for underwater sensor nodes.

3. PKNERGY-Based Battery Solution

PKNERGY’s semi-solid lithium battery solutions are designed for high-pressure underwater environments and long-term deployment.

• Chemistry: Semi-solid Li-ion system combining high energy density with superior safety
• Voltage Range: 3.7V to 48V (customizable)
• Capacity: 2Ah–50Ah modular configurations
• Design: Fully encapsulated IP68+ waterproof housing with corrosion-resistant materials
• Protection: Integrated PCM/BMS for overcharge, discharge, and thermal control
• Connectors: Waterproof and pressure-resistant cabling with potting sealant options
• Certifications: UN38.3, IEC62133, CE, UL, and MSDS compliant

These packs are ideal for underwater sensor nodes, AUVs, ROVs, and long-term oceanographic instruments.

4. Value for Buyers, Project Managers, and Engineers

For Buyers

• Low MOQ and cost-effective modular packs
• Stable long-term supply chain and global shipping

For Project Managers

• Rapid prototyping and ODM/OEM integration
• Technical documentation and testing support

For Engineers

• Advanced BMS integration and waterproof design assistance
• Tailored electrical characteristics and performance validation

5. Case Study: Ocean Monitoring Node Project

Client: European Marine Research Institute

Requirement: Compact 24V 15Ah pack for 500m underwater sensor nodes

Solution: Semi-solid 3.7V 5000mAh cells in 6S3P configuration with aluminum + epoxy sealing

Performance: Over 1000 cycles, 95% capacity retention after one year underwater

Result: Continuous operation for 18 months with zero replacement and stable telemetry performance.

6. Why PKNERGY

• 26 years of lithium battery manufacturing expertise
• Specialized in marine IoT, robotics, and industrial applications
• Annual output: 20M+ cells, 500K+ packs
• In-house UN38.3, IEC62133, and UL testing facilities
• Fast prototyping and small-batch production support

7. FAQ