Study On The Design And Application Of Li-ion Battery Energy Storage System

In many countries and regions in the world,the proportion of wind power and solar power is higher.(For example,the proportion of the German photovoltaic power generation has more than 5%,the output peak in the summer afternoon ratio of more than 40%),Reaching the grid can withstand the upper limit,the allocation of energy storage to smooth output is the necessary conditions for the further improvement of the permeability of renewable energy power generation;Energy storage technology route diversity,but chemical storage(especially battery energy storage)shows potential to become mainstream route,The large area of the electric vehicle market to start the pull of the battery demand will accelerate the decline in its cost.Germany,Japan and other developed countries have begun to provide subsidies to the deployment of the energy storage system,which will accelerate the start of this market,in some particular business model,the energy storage has been gradually with the economy.This dissertation is based on(863 plan)project of the national high technology research and development program: spherical soft needle coke carbon lithium ion storage energy battery system technology and demonstration projects as the carrier of the subject.Research and development based on low cost,long life soft carbon anode materials for high price lithium-ion batteries to store can system,with an emphasis on the development of soft carbon materials industrialized production technology,and based on soft carbon anode materials of high reliability,high security,long life,low cost storage can use lithium ion battery system design,integration and key manufacturing technology.Monomer battery preparation technology,the subject in earlier materials research based.Analysis influence of raw materials on the performance of the battery,with manganese based material as cathode and spherical needle coke soft carbon anode materials matching optimization of electrode material,electrolyte and separator between compatibility,determine the optimization of material system.The structure of mechanical energy storage battery module with the establishment and development of lithium ion battery module model,simulation software using large,professional Ansys,static strength analysis and dynamic analysis of mechanical behavior of the battery module.The battery fatigue model was established,and the coupling of the electrical,thermal and mechanical coupling of the battery module was analyzed,and then the optimization and standardization of the battery module design were put forward.Tolerances apply to swaps,rapid plugging technology,module design within the battery module mechanical interface,power interface and signal interface,replaceable module design.Stability and reliable model of the battery module and the number of different series,optimization of battery module and battery module combination in combination.It focuses on the design of fast and flexible connection of energy storage system,the design of integrated wiring harness,the structure stability,electrical connection reliability and safety protection and other related technologies.The main function of the design of the storage container is to integrate the organic integration of the lithium battery,communication monitoring and other equipment into 1 standard units.The standard unit has its own independent power supply system,a temperature control system,insulation,flame retardant system,fire alarm system,electric interlocking system,mechanical interlocking system,safety escape system,emergency system,fire protection system,automatic control and safety systems.