Recently, China's first all-electric passenger ship, the "Yujian 77," officially launched in Xiamen Bay. This vessel not only offers tourists a zero-emission, low-noise, and high-quality marine tourism experience, but also demonstrates the feasibility of applying pure electric technology in offshore waters. This breakthrough marks the acceleration of the green transformation of the maritime tourism industry.The ship's battery system, equipped with the Yujian 77, innovatively utilizes CTP technology and an integrated CCS (high-voltage charging system) to achieve a battery pack energy density exceeding 140Wh/kg. This system provides the vessel with 3,918kWh of power, enabling a pure electric range of up to 100km, sufficient to support four consecutive Xiamen Bay night cruises."Yujian77"Furthermore, after its commissioning, the "Yujian 77" is expected to reduce fuel consumption by nearly 250 tons and CO2 emissions by over 400 tons annually, equivalent to the carbon sequestration capacity of planting over 20,000 trees.The application of pure electric propulsion technology in ships provides a new technological paradigm for the green development of maritime tourism and passenger transport.As an expert in marine batteries, Bosa offers not only 24V and 48V lithium-ion battery systems for small yachts, but also lithium-ion battery systems for large cruise ships, allowing us to design complete solutions for you. Please contact us to discuss more possibilities.We are always on the road to promote green energy and reduce carbon emissions

In order to better serve new energy electric ship customers, our team has recently actively participated in various related technology and application training, and in-depth learning of professional knowledge such as ship electrification systems, battery integration, safety standards, and on-site commissioning.Recently we participated in the relevant training organized by CCS.Every learning is to provide customers with more efficient, safer, and more tailored solutions with more solid professional capabilities.Our product has an IP67 protection level, explosion-proof vent valve, and BMS safety level ASILC.BOSA marine power supply consists of lithium iron phosphate battery modules, power distribution units (PDU), etc. The batteries can be connected in series and parallel as required. The voltage can reach up to 1000V after series and parallel connection, and the capacity can reach up to 2785kWh, which can cope with severe onboard loads.The system has multi-level safety protection, including a three-level BMS battery management system, a hardware protection system independent of the BMS, an integrated exhaust system, and a high protection level to ensure the stable operation of the system in harsh environments.This product is suitable for scenarios such as pure electric ships, hybrid ships, and offshore facilities and platforms.BOSA Standard Marine String·DNV, BV type approval·Thermal management: liquid cooling and liquid heating·Leak detection + fire prevention and control to ensure safety·C5 exterior bright anti-corrosion level: suitable for inland and offshore·System protection level: IP44, to ensure safe operation of battery systemFor more product information, please contact：www.bosaenergy.cninfo@bosanergy.cn

In order to better serve new energy electric ship customers, our team has recently actively participated in various related technology and application training, and in-depth learning of professional knowledge such as ship electrification systems, battery integration, safety standards, and on-site commissioning.Recently we participated in the relevant training organized by RINA. RINA is one of the oldest classification societies in the world, with outstanding technical strength in cutting-edge fields such as green ships, hydrogen transportation, and intelligent navigation.Every learning is to provide customers with more efficient, safer, and more tailored solutions with more solid professional capabilities.Our product has an IP67 protection level, explosion-proof vent valve, and BMS safety level ASILC.BOSA marine power supply consists of lithium iron phosphate battery modules, power distribution units (PDU), etc. The batteries can be connected in series and parallel as required. The voltage can reach up to 1000V after series and parallel connection, and the capacity can reach up to 2785kWh, which can cope with severe onboard loads.The system has multi-level safety protection, including a three-level BMS battery management system, a hardware protection system independent of the BMS, an integrated exhaust system, and a high protection level to ensure the stable operation of the system in harsh environments.This product is suitable for scenarios such as pure electric ships, hybrid ships, and offshore facilities and platforms.BOSA Standard Marine String·Type approval by CCS.·The modular design facilitates transportation, installation, system construction,operation,and maintenance.·The integrate exhausted gas duct will reduce the risk of fire or explosion in the battery compartment.·Battery string level thermal management: Air cooling/liquid cooling optional.·C5 Enclosure anticorrosion class: Apply for inland river and ocean applications.For more product information, please contact：www.bosaenergy.cninfo@bosanergy.cn

Battery sorting refers to selecting appropriate variables such as battery ohmic internal resistance, polarization internal resistance, open circuit voltage, rated capacity, charge and discharge efficiency, self-discharge rate, etc., and classifying batteries through sorting, and classifying batteries with good battery parameter consistency into the same category. It is mainly to improve the consistency of internal characteristics after battery grouping, so as to improve the efficiency of module use and extend its service life.Battery sorting methods mainly include single factor method, multi-factor method, dynamic sorting method, etc.Single factor sortingRefers to selecting a certain parameter of the battery as the only sorting variable. The selected variables usually include the battery's ohmic internal resistance, the battery's polarization internal resistance, the battery's charging cut-off voltage, the battery's capacity, etc.Multi-factor sortingRefers to selecting multiple representative parameters of the battery as the battery's sorting variables. Common sorting variables are similar to the single parameter sorting method, but usually more than two of them are selected.Dynamic sortingRefers to using certain values of the battery as sorting variables when the battery is in the charge and discharge state, such as dynamic DCIR, charge and discharge curves, and sorting the battery based on this. The relationship between the battery's internal parameters and battery performance under the charge and discharge state is considered, and the change trend of the sorting variable during the battery's charge and discharge process can be better reflected.Bosa EnergyBosa Energy with 150GWH capacity and over 400,000 electric bus/utility vehicle application experience we are listing first 5 in China power battery industry. We cooperate with Yutong/Geely/Damiler etc.We are also offering Container ESS systems and delivered 6GWh in 2024(=75,000 Model3 with 80kWh battery). In local market, we are offering OEM service for Changan, CALB, National grid, Ping Gao Electric , Xuji electronics, Ruineng electronics, they are our main Container ESS suppliers in China Market.We are the most professional supplier of marine lithium batteries in China, and our export volume of marine batteries consistently ranks among the top three in China; We are also the top 1 exporter of lithium battery modules in China, specializing in providing various lithium battery module solutions.For excellent quality and performance our products are popular in more than 30 countries in the world. We also have established warehouse in Germany and Netherlands to provide safety stock timely delivery for our customers.l Customized and Flexiblel High Delivery capacityl Wide Applicationsl Rich experience on Lithium battery pack

The three-electric system is the main component of electric shipsBattery system: mainly includes two parts: battery and BMS. Battery is the power source of electric ships, and its performance and cost are dominant. At present, China's ship lithium batteries mainly use iron-lithium batteries, which usually need to have the characteristics of high consistency, high safety, high performance, and long life. The combination of battery system and BMS can achieve stable and efficient operation.Marine electric propulsion system architecture Image source: E FALKEElectric control system: The electric control system includes network control equipment and distribution unit. The network control equipment includes central processing unit, screen display unit, switch and communication module unit, etc. The distribution equipment includes distribution board, starter, shore power box and emergency charging and discharging board, etc.Propulsion system: mainly includes propulsion inverter, propulsion motor and propeller, which is the power unit of electric ships. According to different power networking technologies, electric propulsion can be divided into AC networking and DC networking. At present, DC networking is the mainstream technical route. Compared with AC networking, the system integration is higher. Because the distribution board and some transformers are omitted, the volume and weight are reduced, and the fuel consumption and noise are also reduced.DC grid propulsion system Image source:wartlisaShore power system is the core supporting equipment of electric shipsShore power system refers to the system that supplies power to ships from the port during the normal operation of the ship at the port. It is also called the port shore power system or the shore power system used by ships at the port.The main components of the shore power system include:Shore power supply: including power stations, substations and distribution devices, etc., which can use traditional power networks or renewable energy such as solar energy and wind energy for power supply.Shore cable: The cable system connecting the shore power supply and the ship needs to have high strength, corrosion resistance and insulation performance.Ship interface equipment: including shore power interface equipment and ship receiving equipment. The shore power interface equipment is located on the shore and is responsible for connecting power from the shore cable to the ship.Control and monitoring system: Equipment used to control the operation of the shore power system and monitor power transmission. It can monitor power load, voltage, frequency and other parameters in real time, and adjust and manage them.Shore power system topologyBosa EnergyBosa Energy with 150GWH capacity and over 400,000 electric bus/utility vehicle application experience we are listing first 5 in China power battery industry. We cooperate with Yutong/Geely/Damiler etc.We are also offering Container ESS systems and delivered 6GWh in 2024(=75,000 Model3 with 80kWh battery). In local market, we are offering OEM service for Changan, CALB, National grid, Ping Gao Electric , Xuji electronics, Ruineng electronics, they are our main Container ESS suppliers in China Market.We are the most professional supplier of marine lithium batteries in China, and our export volume of marine batteries consistently ranks among the top three in China; We are also the top 1 exporter of lithium battery modules in China, specializing in providing various lithium battery module solutions.For excellent quality and performance our products are popular in more than 30 countries in the world. We also have established warehouse in Germany and Netherlands to provide safety stock timely delivery for our customers.l Customized and Flexiblel High Delivery capacityl Wide Applicationsl Rich experience on Lithium battery pack

Electric propulsion technology has multiple advantages. Electric ships have obvious advantages in reducing operating costs, improving driving experience, and promoting ship intelligence.Low operating costPure electric ships have a greater advantage in operating costs than conventional diesel ships. Taking a tugboat as an example, the power consumption of a pure electric ship within 30 years of its service life can save the cost of a conventional tugboat.Strong maneuverabilityThe propulsion motor speed of a pure electric ship is easy to adjust, and the propeller adopts a full-rotation design, which can provide constant torque at various speeds in both forward and reverse directions.High space utilizationThe shaft length of traditional ships often accounts for about 40% of the length of the ship. Pure electric propulsion ships replace traditional transmission shafts, generator oil separators, oil tanks, fuel boilers and other equipment and facilities as well as fuel pipelines, improve the layout of the engine room, and can make more reasonable use of the engine room space.Environmental protectionPure electric propulsion ships greatly reduce vibration and noise on board, improve the comfort of crew and passengers, and do not emit atmospheric pollutants during work, which also reduces the possibility of fuel pollution to the waters.IntelligencePure electric ships eliminate a large number of fuel machinery and equipment, and replace them with electrical equipment that is easy to operate, more integrated and intelligent, with a high degree of automation, which is more conducive to achieving the integration of machine and driver.Bosa EnergyBosa Energy with 150GWH capacity and over 400,000 electric bus/utility vehicle application experience we are listing first 5 in China power battery industry. We cooperate with Yutong/Geely/Damiler etc.We are also offering Container ESS systems and delivered 6GWh in 2024(=75,000 Model3 with 80kWh battery). In local market, we are offering OEM service for Changan, CALB, National grid, Ping Gao Electric , Xuji electronics, Ruineng electronics, they are our main Container ESS suppliers in China Market.We are the most professional supplier of marine lithium batteries in China, and our export volume of marine batteries consistently ranks among the top three in China; We are also the top 1 exporter of lithium battery modules in China, specializing in providing various lithium battery module solutions.For excellent quality and performance our products are popular in more than 30 countries in the world. We also have established warehouse in Germany and Netherlands to provide safety stock timely delivery for our customers.l Customized and Flexiblel High Delivery capacityl Wide Applicationsl Rich experience on Lithium battery pack