【摘要】：近年來電動汽車產(chǎn)業(yè)發(fā)展迅速，動力電池的需求急劇增加。磷酸鐵鋰電池由于在循環(huán)壽命、安全性，甚至成本等方面的顯著優(yōu)勢成為動力電池的首選。同時鋰離子電池不同于水溶液電池的工作原理使其可以采用軟包裝結(jié)構(gòu)。由于采用鋁塑復(fù)合膜包裝的工藝，這使得磷酸鐵鋰動力電池比能量和安全性等方面進一步得到提高。 作為磷酸鐵鋰動力電池重要原材料之一，，鋁塑復(fù)合膜的性能，如電解液耐蝕性、熱封裝緊密性等對電池有著重要影響。本論文采用示差掃描量熱法（Differential Scanning Calorimetry）對鋁塑復(fù)合膜進行熱分析，根據(jù)DSC結(jié)果得到鋁塑復(fù)合膜的最佳熱封裝溫度。此外，針對鋁塑復(fù)合膜在實際應(yīng)用中出現(xiàn)的肉眼難以觀測的針孔和內(nèi)表層露鋁，研究中嘗試以鋁塑復(fù)合膜為陰極，在含銅離子的溶液中電沉積銅以檢測鋁塑復(fù)合膜的微破損，該方法具有操作簡單、現(xiàn)象明顯的優(yōu)點。 目前磷酸鐵鋰動力電池的另一個缺點是低溫性能較差，研究中利用激光粒度分析儀、比表面分析儀、XRD、ICP等對不同的磷酸鐵鋰進行對比分析，在此基礎(chǔ)上通過測試成品電池的低溫性能以了解磷酸鐵鋰對成品電池低溫性能的影響，結(jié)果表明正極材料對軟包裝磷酸鐵鋰動力電池低溫放電性能影響明顯。 最后測試了行業(yè)中新出現(xiàn)的涂碳鋁箔正極集流體，結(jié)果表明涂碳鋁箔集流體不僅可以顯著降低電池充放電時候的極化，同時也可以提高軟包裝電池的保液量，進一步提高動力電池的循環(huán)性能，此外，在生產(chǎn)中也更容易提高電池制片合格率和控制電池內(nèi)阻分布。
[Abstract]:In recent years, the electric vehicle industry has developed rapidly, and the demand for power batteries has increased sharply. Lithium iron phosphate battery has become the first choice for power battery because of its remarkable advantages in cycle life, safety and even cost. At the same time, the working principle of lithium-ion battery is different from that of aqueous solution battery, so that it can adopt soft packaging structure. Due to the process of aluminum-plastic composite film packaging, the specific energy and safety of lithium iron phosphate power battery have been further improved. As one of the important raw materials for lithium iron phosphate power battery, the properties of aluminum-plastic composite film, such as electrolyte corrosion resistance, thermal packaging tightness and so on, have an important impact on the battery. In this paper, the thermal analysis of aluminum-plastic composite film was carried out by differential scanning Calorimeter (Differential Scanning Calorimetry). According to the results of DSC, the optimum thermal packaging temperature of aluminum-plastic composite film was obtained. In addition, in view of the pinhole and inner surface dew aluminum which is difficult to be observed by the naked eye in the practical application of aluminum-plastic composite film, the aluminum-plastic composite film is used as cathode to electrodeposit copper in solution containing copper ion to detect the micro-damage of aluminum-plastic composite film. This method has the advantages of simple operation and obvious phenomenon. At present, another disadvantage of lithium iron phosphate power battery is the poor performance at low temperature. Laser particle size analyzer, specific surface analyzer and XRD,ICP are used to compare and analyze different lithium iron phosphate. On this basis, the low temperature performance of the finished battery was tested to understand the effect of lithium iron phosphate on the low temperature performance of the finished battery. The results showed that the cathode material had obvious effect on the low temperature discharge performance of the soft packaged lithium iron phosphate battery. Finally, the new carbon-coated aluminum foil positive collector fluid in the industry is tested. the results show that the carbon-coated aluminum foil collector can not only significantly reduce the polarization of the battery during charge and discharge, but also increase the liquid retention of the soft packaging battery. The cycle performance of power battery is further improved, in addition, it is easier to improve the qualified rate of battery production and control the distribution of battery internal resistance in production.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM912

【參考文獻】

相關(guān)期刊論文 前10條

1 黃友橋;管道安;;鋰離子電池隔膜材料的研究進展[J];船電技術(shù);2011年01期

2 楊春巍;吳鋒;吳伯榮;任永歡;姚經(jīng)文;;含F(xiàn)EC電解液的鋰離子電池低溫性能研究[J];電化學(xué);2011年01期

3 孟冬;鋰離子蓄電池鋁塑復(fù)合膜包裝材料設(shè)計與應(yīng)用[J];電源技術(shù);2001年04期

4 李永安,徐立球,李學(xué)兵;聚合物鋰離子蓄電池芯軟包裝材料的設(shè)計[J];電源技術(shù);2003年06期

5 宋懷河;楊樹斌;陳曉紅;;影響鋰離子電池高倍率充放電性能的因素[J];電源技術(shù);2009年06期

6 李佳;廖文俊;曾樂才;夏保佳;;石墨/LiFePO_4電池高溫儲存后的性能[J];電池;2012年06期

7 楊學(xué)毅;任學(xué)穎;刁玉琦;張海昌;;電池隔膜的研究與進展[J];電源技術(shù);2013年07期

8 蒲薇華;何向明;王莉;萬春榮;姜長印;;鋰離子電池LiBOB電解質(zhì)鹽研究[J];化學(xué)進展;2006年12期

9 高振朋;楊f;萬憲慶;;鋁合金表面焦磷酸鹽電鍍銅[J];輕合金加工技術(shù);2008年02期

10 班朝磊;;酸堿預(yù)處理對陽極鋁箔電蝕特征的影響[J];輕合金加工技術(shù);2010年05期

相關(guān)博士學(xué)位論文 前1條

1 彭成信;鋰離子電池集流體與新型離子液體電解液的相容性及界面電化學(xué)行為研究[D];上海交通大學(xué);2008年

本文編號：2495593