The emerging "lithium battery electric ships" will become the preferred choice for short distance transportation ships, sightseeing ships, ferries, etc. in inland rivers and lakes due to their advantages of green environmental protection, zero pollution, safety, and low operating costs. As the safest iron phosphate lithium battery in the lithium battery family, with the breakthroughs in safety, long endurance, high power, and long life related lithium battery technologies in recent years, iron phosphate lithium batteries will become the preferred energy source for the development of electric ships due to their relatively low price, high energy density, easy maintenance, and excellent safety performance. Compared to other lithium batteries, lithium iron phosphate batteries have the following advantages when applied to ships:

1)Lithium iron phosphate batteries have higher safety

The LiFePO4 cathode iron phosphate lithium battery with orthogonal olivine structure has excellent safety and high temperature resistance. It is currently the safest battery cathode electrode material for lithium-ion batteries and does not contain harmful heavy metal elements to the human body. The crystal structure of its olivine structure is stable, and oxygen (O) and phosphorus (P) are firmly bound by strong covalent bonds, making it difficult for the oxygen in its structure to oxidize with the electrolyte, Even under high temperature conditions, there will be no structural collapse and heating, which can ensure the stability and safety of the battery charging and discharging process. The electric heating peak of lithium iron phosphate can reach 350 ℃ -500 ℃, while that of lithium manganese oxide (LMO; LiMnO) and lithium cobalt oxide (LCO; LiCoO) is only around 200 ℃. With a wide working temperature range (-20 ℃~+75 ℃), it has outstanding advantages in high temperature performance and safety, making it the preferred cathode electrode material for medium to large capacity and medium to high power lithium-ion batteries.

2) Lithium iron phosphate batteries have a longer service life
Lithium iron phosphate batteries have a complete charging cycle life of over 2000 times, and can be used with standard charging and discharging (5-hour rate), usually up to 2000 times. Under the same conditions, the theoretical life of lithium iron phosphate batteries will reach 7-8 years. And lithium iron phosphate batteries have the ability to discharge large currents and can also be quickly charged and discharged with high currents of 2C.

3) High unit energy density of mass-produced products with price advantages
According to reports, the energy density of square aluminum shell lithium iron phosphate batteries produced in 2018 was around 160Wh/kg. In 2019, some excellent battery manufacturers were able to achieve the level of 175-180Wh/kg. Some powerful companies have produced lithium iron phosphate batteries with the highest energy density exceeding 190Wh/kg. Currently, there is a high difficulty in overcoming the high energy density of 200Wh/kg of lithium iron phosphate cells in the market, And the lithium iron phosphate system can continue to improve energy density. With the market's optimism for the future electric ship market and energy storage market, the proportion of lithium iron phosphate batteries applied in the electric ship field will increase in the future. At the same time, energy density will inevitably experience significant development, and unit prices will also show a downward trend.

4) Green and pollution-free environmentally friendly products
Lithium iron phosphate batteries generally do not contain any heavy metals or rare metals, are non-toxic and pollution-free, and comply with the European Directive on the Restriction of Hazardous Substances in Electronic and Electrical Equipment. They are excellent green and environmentally friendly batteries.