Risk Analysis Of 500 Passenger Lithium Battery Electric Passenger Ship

With the rapid economic development in recent years,people have paid more attention to environmental protection issues,and the country has also strongly advocated the development of a green economy.Green and environmentally friendly clean energy is gradually replacing traditional energy,and electricity as a renewable clean energy is even more popular.Because diesel and gasoline are mostly used in the traditional ship power,in addition to the non-renewable fuel,its combustion has brought great harm to the environment.Environmentally friendly electricity replaces fuel.Many small passenger ships at home and abroad are using electric power to propel.With the development of technology,more environmentally friendly lithium batteries have replaced lead-acid batteries as their power source.However,battery itself is a dangerous product,and safety problems caused by power lithium batteries at home and abroad also occur from time to time.The safety issues of lithium batteries themselves are also the focus of experts and scholars.And this project plans to build a 500-passenger passenger ship.There are few cases of applying large-scale battery packs as a source of power for passenger ships at home and abroad.Therefore,a risk analysis must be performed on this passenger ship.The working status of electric passenger ships is divided into docking dock charging and sailing discharge.This article will specifically analyze these two conditions,and use COMSOL software to analyze and calculate the consequences of thermal runaway combustion of lithium batteries.Combined with the specific analysis results,to determine whether electricity as a power is safe and feasible for 500-passenger passenger ships,and put forward some effective measures to avoid risks for passenger ships.The main work of this article is as follows:(1)Learned the development of power lithium battery and its safety research status in the past ten years by consulting the literature,especially the research status of lithium battery combustion and explosion after thermal runaway.At the same time,grasp the current research status of risk assessment,especially the status quo of risk assessment in the field of ships,and understand the latest research methods of experts and scholars at home and abroad.The first chapter will also give a detailed introduction to 500 passenger lithium battery powered passenger ships to lay the foundation for risk assessment.(2)Chapter 2 first briefly explains the definition of risks,the principles that must be followed and the types of risks,and compares some of the major risk identification and risk assessment methods.Then it introduces the structure and working principle of lithium battery,the principle and reason of thermal runaway of lithium battery,and lays the theoretical foundation and engineering background for the third chapter.(3)First,use experiments to verify the safety of LF105,and observe the effect on the surrounding cells after burning through the thermal runaway combustion experiment.Then use COMSOL software to simulate,calculate and analyze the consequences of thermal runaway combustion of power lithium battery.The battery cell is the smallest battery cell in the entire power lithium battery.First,the impact range of a single cell after combustion is analyzed.The battery unit that is one level larger than the battery core is the battery pack,and then the consequences and impact range of the entire battery pack after burning are analyzed.Judging by the influence range of the battery after thermal runaway combustion,it is safe to use the large-scale lithium battery as a power on a 500-passenger power boat.(4)In the process of risk assessment,first identify the risk of charging conditions for passenger ships docked at the dock,use the fault tree analysis method to determine the cause of the accident and analyze the basic events,and use the Delphi method to calculate the probability of the accident and determine The most prone to accidents under charging conditions.Using fuzzy calculation to calculate the probability of lithium battery thermal runaway during charging,according to the guidelines recommended by IMO,the risk is acceptable.(5)After the charging risk assessment is completed,the risk analysis and identification of the passenger ship during the navigation process are performed,and the fault tree analysis method is used to determine the cause of the accident.Based on the risk assessment,find effective measures to avoid accident risks.(6)Carry out fire analysis on the whole ship,analyze how the 500-seat electric ship can prevent fire and how to respond to the fire,and provide time and path for people to escape.