I. Introduction
The primary underwater power source for conventional submarines is the power battery, whose performance is directly related to the concealment and maneuverability of the submarine [1]. With the advantages of high energy density and long cycle life, lithium-ion batteries have become the market’s most commonly used battery system today. Following the rapid expansion of EVs, the military-strategic importance of lithium-ion batteries will be increasingly significant [2]. Based on this, if it can be improved and optimized for submarine equipment, the vitality and combat capability of submarines can be significantly improved.