本文選題：鋰離子電池 + 多尺度模型�。� 參考：《中南大學(xué)》2014年碩士論文

【摘要】：摘要：由于多尺度跨越和多物理場(chǎng)耦合的存在,使用常規(guī)實(shí)驗(yàn)研究方法難以對(duì)鋰離子電池系統(tǒng)進(jìn)行快速、高效和低成本預(yù)估,造成了電池研發(fā)設(shè)計(jì)的困難。本文以2.3Ah,26650圓柱型磷酸鐵鋰鋰離子電池為研究對(duì)象,結(jié)合材料動(dòng)態(tài)參數(shù)響應(yīng)的特點(diǎn),開(kāi)展了鋰離子電池多尺度電化學(xué)模型的構(gòu)建和應(yīng)用研究,為鋰離子電池的優(yōu)化設(shè)計(jì)提供理論基礎(chǔ),同時(shí)推廣了電化學(xué)模擬的應(yīng)用領(lǐng)域。 1.針對(duì)目前鋰離子電池體系材料種類多、多物理場(chǎng)作用明顯而帶來(lái)的電池模型參數(shù)不全或自適應(yīng)性差的問(wèn)題,提出了材料參數(shù)動(dòng)態(tài)響應(yīng)的解決方法。重點(diǎn)解析了電極相關(guān)動(dòng)態(tài)參數(shù)、電解液相關(guān)動(dòng)態(tài)參數(shù)的變化規(guī)律,并提出了材料動(dòng)態(tài)響應(yīng)的構(gòu)建方式和作用機(jī)制。 2.基于材料參數(shù)動(dòng)態(tài)響應(yīng)建立了鋰離子電池準(zhǔn)二維模型,通過(guò)與實(shí)驗(yàn)結(jié)果相對(duì)比驗(yàn)證了模型的準(zhǔn)確性。利用該模型研究了鋰離子電池的脈沖放電和恒流放電行為。 3.基于材料參數(shù)動(dòng)態(tài)響應(yīng)建立了鋰離子電池單顆粒模型。利用該模型研究了磷酸鐵鋰電池的性能提升方向,包括粒徑優(yōu)化、固相擴(kuò)散性能優(yōu)化等方面。與準(zhǔn)二維模型相比,單顆粒模型具有計(jì)算效率高的優(yōu)勢(shì)。
[Abstract]:Absrtact: due to the existence of multi-scale crossover and multi-physical field coupling, it is difficult to predict the lithium ion battery system quickly, efficiently and cheaply by using conventional experimental research methods, which results in the difficulty of battery R & D and design. In this paper, a multiscale electrochemical model for lithium iron phosphate battery was constructed and applied to the study of 2.3Ahn26650 cylindrical lithium-ion phosphate battery, combined with the characteristics of material dynamic parameter response. It provides a theoretical basis for the optimal design of lithium-ion batteries and extends the application field of electrochemical simulation. 1. In order to solve the problem of incomplete model parameters or poor adaptability caused by the variety of materials and the obvious effect of multi-physical fields, a solution to the dynamic response of material parameters is proposed. The dynamic parameters of electrode and electrolyte were analyzed, and the construction and mechanism of material dynamic response were put forward. 2. Based on the dynamic response of material parameters, the quasi-two-dimensional model of lithium ion battery is established, and the accuracy of the model is verified by comparing with the experimental results. The pulse discharge and constant current discharge behavior of lithium ion battery were studied by using this model. 3. A single particle model of lithium ion battery was established based on the dynamic response of material parameters. The model was used to study the performance improvement direction of lithium iron phosphate battery, including particle size optimization, solid diffusion performance optimization and so on. Compared with the quasi-two-dimensional model, the single-particle model has the advantage of high computational efficiency.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM912

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 湯依偉;賈明;程昀;張凱;張紅亮;李R，

本文編號(hào)：1843985