本文選題：動力鋰離子電池 + 電池管理系統(tǒng)　； 參考：《湖南大學》2016年碩士論文

【摘要】：在純電動汽車中,電池單體以串并聯(lián)的方式集成在電池包內(nèi)部,由于制造過程中存在差異,電池組在使用的時候會產(chǎn)生相互間不一致的現(xiàn)象。這種不一致會影響電池壽命與續(xù)航里程。為了解決這個問題,除了提高電池制造水平以外,設(shè)計合理的電池均衡系統(tǒng)是提高電池包性能的主要方法。本文依托于湖南省科技廳重點項目：智能高效動力電池管理系統(tǒng)關(guān)健技術(shù)研究,研究了動力鋰離子電池均衡系統(tǒng)。主要的研究工作如下：(1)通過對目標單體電池進行反復充放電實驗,求取電池的充放電特性曲線。在此基礎(chǔ)上,分別在不同環(huán)境溫度下進行充放電實驗,分析溫度對電池工作性能的影響。(2)以6塊電池為一個模塊,分析電池組不一致性產(chǎn)生的主要機理,分別設(shè)計了電池模塊內(nèi)部與模塊之間的均衡拓撲電路。并對所設(shè)計電路均衡原理進行簡要說明。(3)依據(jù)主控芯片的引腳與功能特性分別設(shè)計了電源電路、SPI通信電路、隔離電路、充放電保護電路、均衡控制電路及其他小型電路。(4)將所設(shè)計的硬件電路按模塊分類,針對各個模塊將要實現(xiàn)的基本功能,編寫相應的控制程序。主要包括主程序、數(shù)據(jù)采集程序、均衡控制算程序及通信程序等。(5)建立電池模型,在Simulink/Simpowersystem系統(tǒng)中搭建能量轉(zhuǎn)移模型及模塊內(nèi)均衡模型,對均衡拓撲結(jié)構(gòu)進行仿真。將所設(shè)計的PCB原理圖制作成印制電路板,燒寫并調(diào)試程序,對控制板進行實驗驗證。結(jié)果表明,所設(shè)計的均衡系統(tǒng)能夠?qū)崿F(xiàn)電池能量均衡,對電池組一致性有改善。
[Abstract]:In the pure electric vehicle, the battery unit is integrated in the battery package in series-parallel mode. Because of the difference in the manufacturing process, the battery pack will produce inconsistent phenomenon when it is used. This inconsistency affects battery life and range. In order to solve this problem, in addition to improving the battery manufacturing level, the design of a reasonable battery equalization system is the main method to improve the battery pack performance. Based on the key project of Hunan Provincial Science and Technology Department: the key technology of intelligent and efficient power battery management system, the power lithium ion battery equalization system is studied in this paper. The main research work is as follows: (1) the charge-discharge characteristic curve of the battery is obtained by repeated charge and discharge experiments on the target cell. On this basis, charge-discharge experiments were carried out at different ambient temperatures, and the effect of temperature on the performance of the battery was analyzed. The balanced topology circuit between the battery module and the battery module is designed. According to the pin and function characteristics of the main control chip, the SPI communication circuit, the isolation circuit and the charge-discharge protection circuit are designed, respectively. Equalization control circuit and other small circuits. 4) the designed hardware circuits are classified into modules, and the corresponding control programs are compiled according to the basic functions to be realized by each module. It mainly includes main program, data acquisition program, equalization control program and communication program, etc.) build battery model, build energy transfer model and internal equilibrium model in Simulink/Simpowersystem system, and simulate the equilibrium topology. The designed PCB schematic is made into a printed circuit board, and the program is burned and debugged, and the control board is verified experimentally. The results show that the designed equalization system can realize the energy balance of the battery and improve the battery pack consistency.
【學位授予單位】：湖南大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：U469.72
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本文編號：1799860