Leclanché, one of the world leaders in energy storage solutions, has completed the development of a third generation marine battery system designed to meet the needs of shipbuilders in the production of 100% electric and hybrid marine vessels.
Called Navius MRS-3TM (Marine Rack System: images available here), the new system improves on Leclanché’s popular and award-winning MRS-2, which already powers a wide range of ferries, container ships and specialist vessels in service around the world. whole world. The new version features significant improvements in energy density, modularity and battery safety, making it the marine industry‘s most flexible and powerful ship electrification system ever created with the lowest carbon footprint.
The system will begin delivery in 2023 and has already been specified in several major design contracts, including Scandlines’ PR24 10 MWh zero-emissions freight ferry. The Navius MRS-3 will be officially presented at the upcoming Electric & Hybrid Marine World Expo 2022 to be held in Amsterdam from June 21-23 at booth 1367.
The long list of enhancements included in the Navius MRS-3 begins with the proprietary, high-energy, best-in-class 65 Ah G/NMC cells built into its M3 Energy battery modules from last generation. Both are produced in-house at the company’s European cell manufacturing facilities in Germany and the company’s new, state-of-the-art automated module assembly line in Switzerland.
Battery string voltages of up to 1200 VDC are available with a continuous string discharge current of up to 720 A. The number of cells per module has been increased from 32 to 36, allowing each module to supply 8, 7 kWh of energy, which represents a 13% increase compared to those installed in the MRS-2. Crucially, the modules comply with the strictest safety requirements for the maritime, rail and road sectors.
“Leclanché’s new Navius MRS-3 represents the latest generation of powerful, safe and emission-free electrification systems for the maritime industry,” said Anil Srivastava, CEO of Leclanché. “We put everything we learned from our award-winning MRS-2 system into this project, setting a new performance standard for ships, including its liquid-cooling architecture that is now universally recognized as the safest in the industry. ‘industry.”
Security is built into every component and the entire system
Safety is built into every aspect of the Navius MRS-3, from individual cells to the complete system. For instance:
Cells – Laminated ceramic separators provide internal short circuit protection and the reduced electrolyte design minimizes the potential volume of flammable gases.
Modules and Enclosures – M3 modules are each equipped with a functionally safe slave unit that measures cell voltages and temperatures and performs diagnostics. IP rated enclosures provide protection against mechanical and electrical incidents and keep out water and contaminants in the event of thermal runaway while keeping harmful gases/flames in and out via a system sealed exhaust. All parts of the system are protected against water ingress.
Battery Management Systems (BMS) and Control Unit – A “functionally safe” BMS consisting of master and slave units integrated inside each module providing an unrivaled level of maritime safety. A remote battery data monitoring system is available as an option, allowing continuous monitoring of battery condition.
Liquid Cooling – All modules are liquid cooled with dedicated aluminum cooling plates. In addition, all the connections of the cooling pipes are external to the enclosure of the module, which avoids the risk of leaks inside the module which could cause thermal incidents. Conductive aluminum cooling sheets separated between cells dissipate heat from the modules, eliminating hot spots and helping to further extend the life of the battery system. The liquid-cooled design increases system life and allows for up to 50% higher power density than air-cooled systems.
Active Safety System – Each module box contains an automated fail-safe system to prevent thermal spread.
Flexible system configurations, ease of maintenance and new service options
Navius MRS-3 racks are available in seven different heights, allowing them to fit into almost any drum room. They deliver 27% more power in a comparable footprint than previous generation systems; the reduced width of the rack requires one-third less front access for maintenance.
Revised system design emphasizes ease of access to key components, including:
- Easily accessible cooling hoses at the front of the racks
- High voltage cables are accessible from the front of the rack and now feature a ‘quick connect’ system for simple and safe attachment and removal.
- Control panel including BMS slides out of rack
- Each rack’s cooling system can be drained individually
- Modules can be subscribed individually
- Single-module enclosure design
- Easier installation overall
- Enhanced training and service options
Even the Navius MRS-3’s service and support options have been redesigned and improved to provide wider options for customers throughout the product life cycle. A new 10-year performance guarantee is available for customers subscribing to a Leclanché support and maintenance contract. The system comes standard with a two-year warranty.
In addition, Leclanché is introducing three new service bundles:
Responsive services include a 24/7 hotline, remote support and access to an in-house on-site service engineer as well as Leclanché’s partner network.
Preventive services include maintenance training to instruct teams on how to maintain and troubleshoot; and annual preventative maintenance on board to perform routine visual, mechanical and electrical checks.
Newly available predictive services for customers based on secure and reliable battery system data monitoring. Users can access a user-friendly IoT platform allowing them to view detailed analysis and status reports of their battery system. They will also receive expert analysis, warnings and recommendations throughout the lifetime of their system.
Leclanché also offers spare parts kits to allow rapid on-site interventions and repairs.