As an important offshore combat platform, submarine has very high requirements on power system. In recent years, with the continuous development and maturity of lithium-ion battery technology, more and more foreign submarines begin to use lithium-ion power batteries as the main power source to improve the endurance and operation efficiency of submarines. This paper will analyze the application situation and technology of foreign submarine lithium ion power battery, so as to discuss the application Current Status and trends of this technology in submarine field.

1. Application of foreign submarine lithium ion power batteries

united States

the U.S. Navy is one of the most powerful navies in the world. Its nuclear-powered submarine is equipped with advanced lithium-ion power battery systems. Both Virginia-class attack nuclear-powered submarine and Columbia-class ballistic missile nuclear-powered submarine of the US Navy use lithium-ion batteries as the main power source of the submarine to improve the endurance and stealth efficiency of the submarine.

Germany

the U31 submarine of the German Navy is the first submarine in the world that uses lithium-ion power batteries. It adopts the high-performance lithium-ion battery system developed by Siemens. By introducing lithium-ion battery technology, the German Navy significantly improved the submarine's stealth capability and operational efficiency.

Sweden

the Swedish Navy's Gotland-class submarine also uses a lithium-ion power battery system, which has a long endurance and high speed performance in the stealth state. The application of lithium-ion battery system makes Swedish submarine have stronger combat effectiveness in maritime operations.

2. Technical analysis of lithium ion power battery

high energy density

lithium ion battery has the characteristics of high energy density and light weight, which can provide longer endurance and higher speed performance for submarine and help to improve the operational efficiency of submarine.

Fast charge and discharge performance

lithium ion battery has excellent fast charging and discharging performance, which can realize charging and discharging in a short time and improve the combat response speed and efficiency of submarine.

High security

modern lithium-ion battery system adopts multiple safety protection measures, which can effectively prevent battery overcharge, overdischarge, short circuit and other problems, and ensure the safe and stable operation of submarine power system.

Environmental protection and energy saving

lithium ion battery is clean and environmentally friendly resources, which does not produce exhaust gas and noise, which is conducive to reducing the environmental pollution of submarine and improving the sustainable development of submarine.

3. Technical challenges and development trends

technical challenges

• the safety and stability of lithium ion batteries are one of the major challenges currently applied to submarines, and the safety and reliability of lithium-ion battery system need to be further improved.
• The cycle life and charging speed of lithium ion batteries are also technical problems to be solved to meet the needs of long-time stealth and fast response of submarines.

Development Trend

• in the future, lithium ion battery technology will further improve energy density and safety, and its application scope in submarines will be further expanded.
• With the development of new materials and technologies, lithium-ion battery system will be continuously improved and innovated to provide more reliable and efficient power support for submarines.

power Battery as an advanced power source technology, we can see that lithium ion battery has been widely used in foreign submarine field. With the continuous development and improvement of technology, lithium-ion batteries will continue to provide more efficient and reliable power support for submarines, bringing new breakthroughs and improvements to their combat capability and endurance.