本文選題：鎳氫電池　切入點：散熱　出處：《哈爾濱工業(yè)大學》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。對于汽車產業(yè)來說，這種趨勢意味著電動汽車將逐步替代傳統(tǒng)汽車。制約電動汽車產業(yè)發(fā)展的主要因素便是車載的動力電池。提高電池的性能，是電動汽車產業(yè)進步發(fā)展的基礎因素。 電池溫度是影響動力電池性能的主要因素。其具體又可分為電池內部的最高溫度與各個電池間的溫度差。對于鎳氫電池來說，，其工作溫度應在40oC以內，電池之間的溫度差不宜超過5oC。 本文以應用于電動汽車中的一款EV-95鎳氫動力電池組作為研究對象，主要研究了以下幾個方面： 1、分析了鎳氫電池的產熱根源與規(guī)律，及其熱量主要來源的四個部分。并且簡述了鎳氫電池溫度對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。 2、在散熱溫度場結構較為復雜時，求解的過程多采用計算流體力學（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方程，以及CFD在電池溫度場求解計算過程中的應用 3、分析了電池組幾何模型與溫度場模型，提出了對其原有實物對象較為復雜模型的化簡整理方案。同時論述了各個有關參數的選取過程，F(xiàn)luent仿真軟件的設置環(huán)節(jié)，并最終利用軟件仿真得到的電池組速度場與溫度場的分布圖像。 4、對電池原有的散熱性能提出幾種優(yōu)化的方案，在此基礎上，探討了空氣流速與進氣角度對于電池散熱性能的影響。并得出結論，空氣流速的增加對于電池散熱性能來說，存在著一個最優(yōu)的范圍。以本文中的電池組結構為例，這個最佳的流動速度在10m/s左右。而空氣進氣角度的增加對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.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U469.72;TM912

【參考文獻】

相關期刊論文 前6條

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

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

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

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

5 楊志剛;黃慎;趙蘭萍;;電動汽車鋰離子電池組散熱優(yōu)化設計[J];計算機輔助工程;2011年03期

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

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