Lithium battery pack of large underwater vehicle

Abstract

The invention discloses a lithium battery pack of a large underwater vehicle. The lithium battery pack is characterized by comprising a battery cabin, battery modules, a bus bar, two battery racks, a fastening pressure plate, a battery management system and locking mechanisms, wherein the battery cabin is cylindrical, the head and the tail of the cabin are semispherical, an inlet and an outlet are formed in the upper part of the cabin, the two battery racks are symmetrically arranged on the two sides of the cabin, and a maintenance channel is formed in the middle of the cabin; the cross section of each battery rack is bow-shaped and comprises two straight edges and an arc, and the radius of the arc is the same as that of the inner wall of the battery cabin; the battery rack is divided into an upper layer and a lower layer; each layer is provided with a plurality of compartments, the locking mechanisms are arranged in the compartments, and the battery modules are symmetrically mounted in the compartments. The lithium battery pack provided by the invention is high in volumetric specific energy, good in safety performance, strong in environmental adaptability and convenient to maintain.

Description

technical field [0001] The invention relates to a lithium battery pack for a large underwater vehicle. Background technique [0002] With its high energy and power density, high voltage platform, long service life, no memory effect, and relatively friendly to the environment, lithium-ion batteries have been applied to underwater submersibles by researchers from many countries, such as: AUV, SDV, It is one of the most promising technologies to carry out scientific investigation, resource investigation and military use on ROV, small submarines and future large submarines, with broad market prospects and development space. [0003] During the voyage of the submersible, there are movements in the direction of pitching and rolling, including shaking, etc., and the connection and fixing parts are easy to loosen or loosen, causing poor contact and causing serious troubles to the use of the battery pack. [0004] During the charging and discharging process of the battery pack, each...

AI Technical Summary

Problems solved by technology

[0004] During the charging and discharging process of the battery pack, each battery will generate heat. In a closed environment, if the heat cannot be properly dissipated, the excessively high temperature will cause uneven heat accumulation, which will affect the battery performance, life and charging and discharging efficiency.

In severe cases, it will cause thermal runaway, causing potential safety problems

Images