As the shipping industry accelerates its green energy transition, traditional marine batteries still present critical limitations: their excessive weight compromises cargo capacity, short lifespan drives up operational costs, and safety risks like electrolyte leakage and thermal runaway remain persistent concerns for shipowners.
ROYPOW’s innovative LiFePO4 marine battery system overcomes these limitations. Certified by DNV, the global benchmark for maritime safety standards, our high-voltage lithium battery solutions bridge a crucial technology gap for ocean-going vessels. While still in the pre-commercial phase, the system has already gained strong interest, with multiple leading operators joining our pilot testing program.
DNV Certification Explanation
1. The Stringency of DNV Certification
DNV (Det Norske Veritas) is one of the most recognized classification societies in the maritime industry. Widely regarded as the industry’s gold standard, DNV certification sets higher thresholds and stricter criteria across multiple critical performance areas:
- Vibration Testing: DNV certification mandates that marine battery systems withstand prolonged, multi-axial vibrations across wide frequency ranges. It focuses on the mechanical integrity of battery modules, connectors, and protective components. By verifying the system’s ability to endure the complex vibration loads experienced during vessel operations, it ensures reliable performance even in harsh sea conditions.
- Salt Spray Corrosion Testing: DNV requires strict compliance with ASTM B117 and ISO 9227 standards, emphasizing the durability of enclosure materials, sealing components, and terminal connections. Upon completion, the lithium marine batteries must still pass functional verification and insulation performance tests, confirming their ability to maintain original performance after extended exposure to corrosive marine conditions.
- Thermal Runaway Testing: DNV enforces comprehensive safety validation for both individual cells and complete LiFePO4 marine battery packs under thermal runaway scenarios. The evaluation covers various aspects, including initiation of thermal runaway, prevention of propagation, gas emissions, and structural integrity.
2. Trust Endorsement from DNV Certification
Achieving DNV certification for lithium marine batteries demonstrates technical excellence while strengthening global market credibility as a powerful endorsement.
- Insurance Advantages: DNV certification significantly lowers product liability and transportation insurance costs. Insurers recognize DNV-certified products as lower-risk, often leading to discounted premiums. Additionally, in case of an incident, claims for DNV-certified LiFePO4 marine batteries are processed more efficiently, minimizing delays caused by product quality disputes.
- Financial Benefits: For energy storage projects, international investors and financial institutions consider DNV certification a key risk-reduction factor. Consequently, companies with DNV-certified products benefit from more favorable financing terms, lessening overall capital expenditures.
High-Volt LiFePO4 Marine Battery System from ROYPOW
Building on rigorous standards, ROYPOW has successfully developed a high-voltage LiFePO4 marine battery system that meets the demanding requirements of DNV certification. This achievement reflects not only our engineering capability but also our commitment to advancing marine energy solutions that are safer, cleaner, and more efficient. The system has the following features and advantages:
1. Safe Design
Our lithium-ion marine battery system incorporates multi-level protection mechanisms to guarantee the utmost safety and reliability.
(1) Quality LFP Cells
Our system is equipped with high-quality LFP battery cells from global top 5 cell brands. This cell type is inherently more stable at high temperatures and under stress. It’s far less prone to thermal runaway, which significantly reduces the risk of fire or explosion, even under extreme operating or fault conditions.
(2) Fire-Resistant Structure
Each battery pack integrates a built-in fire extinguishing system. The NTC thermistor inside the system handles the faulty battery and will not affect other batteries when with fire risks. Moreover, the battery pack features a metal explosion-proof valve on the back, seamlessly connected to an exhaust duct. This design rapidly vents flammable gases, preventing internal pressure buildup.
(3) Software and Hardware Protection
ROYPOW lithium marine battery system is equipped with an advanced BMS (Battery Management System) in a more stable three-level architecture for intelligent monitoring and protection. Additionally, the system adopts dedicated hardware protection inside the batteries and the PDU (Power Distribution Unit) to monitor the cell temperature and avoid over-discharging.
(4) High Ingress Rating
The battery packs and PDU are IP67-rated, and the DCB (Domain Control Box) is IP65-rated, offering robust protection against water ingress, dust, and harsh marine conditions. This ensures long-term reliability and stable performance even in environments exposed to salt spray and high humidity.
(5) Other Safety Features
ROYPOW high-voltage marine battery system features the HVIL function on all power connectors to disconnect the circuit when necessary to prevent electric shock or other unexpected incidents. It also includes the emergency stop, MSD protection, battery-level & PDU-level short-circuit protection, etc.
2. Performance Advantages
(1) High Efficiency
ROYPOW high-voltage lithium marine battery system is engineered for outstanding efficiency. With a high energy density design, the system reduces overall weight and space requirements, offering greater flexibility for vessel layout and increasing usable capacity.
In demanding marine operations, the system stands out for its low maintenance requirements and long service life. With a simplified system architecture, robust components, and intelligent diagnostics enabled by an advanced BMS, routine maintenance is minimized, reducing downtime and operational disruptions and maximizing efficiency.
(2) Exceptional Environmental Adaptability
Our LiFePO4 marine battery boasts remarkable adaptability to extreme temperatures, with a range spanning from -20°C to 55°C. This enables it to effortlessly handle the challenges of polar routes and other extreme environments, securing stable operation in both frigid and scorching conditions.
(3) Long Cycle Life
The marine LiFePO4 battery has an impressive cycle life of over 6,000 cycles. It maintains over 10 years of lifespan at 70% – 80% of remaining capacity, decreasing the frequency of battery replacements.
(4) Flexible System Configuration
ROYPOW high-volt lithium-ion marine battery system is highly scalable. The capacity of a single battery system can reach up to 2,785 kWh, and the total capacity can be expanded to 2-100 MWh, presenting ample room for future upgrades and expansions.
3. Broad Applications
ROYPOW high-volt lithium marine battery system is designed for hybrid or fully electric vessels and offshore platforms such as electric ferries, work boats, passenger boats, tugboats, luxury yachts, LNG carriers, OSVs, and fish farming operations. We’re offering highly customized solutions for different vessel types and operational requirements, ensuring optimal integration with existing onboard systems, providing the flexibility and performance needed to power the future of sustainable marine transport.
Call for Pioneer Partners: A Letter to Shipowners
At ROYPOW, we fully recognize that every vessel has its unique requirements and operational challenges. That’s why we offer fully customized services tailored to your specific needs. For example, we previously developed a 24V/12V compatible solution for a client in the Maldives. This marine battery system was specifically designed based on the local power infrastructure and operating conditions, ensuring stable performance across different voltage levels.
FAQ
(1) How to assess the reliability of the lithium-ion marine battery system without haoreal-world case studies?
We understand your concern regarding the reliability of new technologies. Although there are no real-world cases, we have prepared extensive laboratory data.
(2) Is the marine battery system compatible with the existing inverter?
We offer protocol integration services to facilitate seamless communication between our lithium-ion marine battery system and your existing power setup.
Wrapping-up
We look forward to working with you to accelerate the maritime industry’s carbon-neutral journey and contribute to protecting the marine environment. We believe the oceans will return to their true azure blue when DNV-certified blue battery cabins become the new standard in shipbuilding.
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