本文選題：鎳氫電池　切入點(diǎn)：散熱　出處：《哈爾濱工業(yè)大學(xué)》2014年碩士論文

【摘要】：隨著傳統(tǒng)能源的日趨緊張，新能源逐漸成為能源行業(yè)發(fā)展的必然趨勢(shì)。對(duì)于汽車產(chǎn)業(yè)來說，這種趨勢(shì)意味著電動(dòng)汽車將逐步替代傳統(tǒng)汽車。制約電動(dòng)汽車產(chǎn)業(yè)發(fā)展的主要因素便是車載的動(dòng)力電池。提高電池的性能，是電動(dòng)汽車產(chǎn)業(yè)進(jìn)步發(fā)展的基礎(chǔ)因素。 電池溫度是影響動(dòng)力電池性能的主要因素。其具體又可分為電池內(nèi)部的最高溫度與各個(gè)電池間的溫度差。對(duì)于鎳氫電池來說，，其工作溫度應(yīng)在40oC以內(nèi)，電池之間的溫度差不宜超過5oC。 本文以應(yīng)用于電動(dòng)汽車中的一款EV-95鎳氫動(dòng)力電池組作為研究對(duì)象，主要研究了以下幾個(gè)方面： 1、分析了鎳氫電池的產(chǎn)熱根源與規(guī)律，及其熱量主要來源的四個(gè)部分。并且簡述了鎳氫電池溫度對(duì)于電池工作性能的影響，確定了電池散熱系統(tǒng)所要滿足的散熱溫度目標(biāo)。 2、在散熱溫度場(chǎng)結(jié)構(gòu)較為復(fù)雜時(shí)，求解的過程多采用計(jì)算流體力學(xué)（CFD）的辦法。文章介紹了描述電池組散熱過程的基本流體力學(xué)方程，以及CFD在電池溫度場(chǎng)求解計(jì)算過程中的應(yīng)用 3、分析了電池組幾何模型與溫度場(chǎng)模型，提出了對(duì)其原有實(shí)物對(duì)象較為復(fù)雜模型的化簡整理方案。同時(shí)論述了各個(gè)有關(guān)參數(shù)的選取過程，F(xiàn)luent仿真軟件的設(shè)置環(huán)節(jié)，并最終利用軟件仿真得到的電池組速度場(chǎng)與溫度場(chǎng)的分布圖像。 4、對(duì)電池原有的散熱性能提出幾種優(yōu)化的方案，在此基礎(chǔ)上，探討了空氣流速與進(jìn)氣角度對(duì)于電池散熱性能的影響。并得出結(jié)論，空氣流速的增加對(duì)于電池散熱性能來說，存在著一個(gè)最優(yōu)的范圍。以本文中的電池組結(jié)構(gòu)為例，這個(gè)最佳的流動(dòng)速度在10m/s左右。而空氣進(jìn)氣角度的增加對(duì)于電池組散熱性能的影響十分有限。
[Abstract]:With the increasing tension of traditional energy, new energy has gradually become the inevitable trend of the development of the energy industry. This trend means that electric vehicles will gradually replace the traditional ones. The main factor restricting the development of the electric vehicle industry is the on-board power battery. Improving the performance of the battery is the basic factor for the progress and development of the electric vehicle industry. Battery temperature is the main factor that affects the performance of power battery. It can also be divided into the maximum temperature inside the battery and the temperature difference between each battery. For Ni-MH battery, the working temperature should be within 40oC. The temperature difference between batteries should not exceed 5oC. In this paper, a EV-95 Ni-MH battery pack which is used in electric vehicle is taken as the research object, and the following aspects are studied:. The main contents are as follows: 1. The source and law of heat production of Ni-MH battery and four main sources of heat are analyzed. The effect of Ni-MH battery temperature on the performance of Ni-MH battery is briefly described, and the heat dissipation temperature target to be satisfied by the battery heat dissipation system is determined. 2. When the structure of heat dissipation temperature field is more complicated, the method of computational fluid dynamics (CFD) is used to solve the problem. The basic hydrodynamic equation describing the heat dissipation process of battery pack is introduced in this paper. The Application of CFD in the calculation of Battery temperature Field. 3. The geometry model and temperature field model of battery pack are analyzed, and the simplification and finishing scheme of the complex model of its original object is put forward. The setting of fluent simulation software is also discussed in this paper. Finally, the distribution images of velocity field and temperature field of battery pack are simulated by software. On the basis of this, the influence of air velocity and inlet angle on the heat dissipation performance of the battery is discussed, and it is concluded that the increase of air flow rate is of great importance to the heat dissipation performance of the battery. For example, the optimal flow velocity is about 10m/s, and the increase of air intake angle has a very limited effect on the heat dissipation performance of the battery pack.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U469.72;TM912

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 李春卉;電動(dòng)汽車的發(fā)展現(xiàn)狀及趨勢(shì)研究[J];汽車工業(yè)研究;2005年05期

2 李蔚;第二屆中國電動(dòng)車產(chǎn)業(yè)高層論壇在京召開[J];電源技術(shù);2005年08期

3 簡旭宇;吳伯榮;朱磊;陳暉;劉明義;;氫鎳動(dòng)力電池自放電一致性研究[J];電源技術(shù);2007年06期

4 王宏偉;鄧爽;肖海清;趙鴻飛;王超;;國內(nèi)電動(dòng)車用動(dòng)力鋰離子電池現(xiàn)狀[J];電子元件與材料;2012年06期

5 楊志剛;黃慎;趙蘭萍;;電動(dòng)汽車鋰離子電池組散熱優(yōu)化設(shè)計(jì)[J];計(jì)算機(jī)輔助工程;2011年03期

6 孫逢春;德國和法國電動(dòng)汽車的現(xiàn)狀和發(fā)展[J];科技潮;2004年08期

本文編號(hào)：1684405