本文選題：氫鎳電池 + 穩(wěn)定內(nèi)壓�。� 參考：《燕山大學》2016年碩士論文

【摘要】：氫鎳電池(MH-Ni)因具有較長的壽命、優(yōu)良的安全性、寬溫度工作范圍以及較高的充放電功率,尤其是在較低的溫度下,具有比鋰離子電池更高的充放電功率等優(yōu)勢,目前仍為混合動力車(HEV)的首選電源之一。在實際HEV應用中,系統(tǒng)必須及時、準確地將電池的荷電態(tài)(SOC)告知整車系統(tǒng),而電池制作完成后,其穩(wěn)定內(nèi)壓(P穩(wěn))與負極合金的平衡氫壓(Peq,H2)存在一一對應的關(guān)系,則電池的穩(wěn)定內(nèi)壓與負極合金的壓力-組成等溫線(P-C-T曲線)存在一定關(guān)系,穩(wěn)定的內(nèi)壓可用于估算MH-Ni電池的SOC。因此對電池內(nèi)壓特性的研究具有重要意義。本文首先對D型動力電池制作完成后(初始狀態(tài))的充放電過程中內(nèi)壓變化的測試及分析,結(jié)果表明,電池的內(nèi)壓隨著充電時間的延長而升高,在隨后的靜置及放電過程中逐漸降低,甚至恢復至初始內(nèi)壓值;隨著充放電倍率的增大,電池的內(nèi)壓升高;環(huán)境溫度越大,內(nèi)壓越高;化成制度、注液量、極片的壓實密度等均影響電池內(nèi)壓的大小。通過在線準確提取不同SOC下,電池內(nèi)部氣體的穩(wěn)定內(nèi)壓,建立不同溫度下,電池初始狀態(tài)的P穩(wěn)與SOC關(guān)系,結(jié)果表明,二者的關(guān)系曲線與合金的P-C-T曲線的變化規(guī)律一致。分別對常溫下1C循環(huán)不同次數(shù)、高溫(60℃)存儲、模擬工況循環(huán)不同周期后的D型電池進行性能測試,并建立不同溫度下P穩(wěn)與SOC的數(shù)學關(guān)系,通過對二者關(guān)系曲線進行擬合分析,結(jié)果表明,相同溫度下,隨著電池的存儲或使用,二者關(guān)系逐漸經(jīng)由二次函數(shù)向多項式轉(zhuǎn)變,滿足關(guān)系式y(tǒng)=ax4+bx3+cx2+dx+e,其中,y代表P穩(wěn),x代表SOC,其取值范圍為0-100間的任一值。
[Abstract]:Because of its long life, good safety, wide temperature range and high charge and discharge power, MH-Ni has the advantages of higher charge and discharge power than lithium ion battery at lower temperature. It is still one of the preferred power sources for HEV. In the practical application of HEV, the system must inform the whole vehicle system of the charged state of the battery in time and accurately. After the battery is made, the stable internal pressure (P) has a one-to-one correspondence with the equilibrium hydrogen pressure of the anode alloy (PeqH2). There is a relationship between the stable internal pressure of the battery and the P-C-T curve of the pressure composition isotherm of the anode alloy. The stable internal pressure can be used to estimate the SOC of Ni-MH battery. Therefore, it is of great significance to study the internal pressure characteristics of the battery. In this paper, the change of internal pressure during charge and discharge process of D type power battery is measured and analyzed. The results show that the internal pressure of D type battery increases with the increase of charging time. During the subsequent statics and discharge, the internal pressure of the battery gradually decreased, and even recovered to the initial internal pressure; with the increase of charge and discharge rate, the internal pressure of the battery increased; the higher the ambient temperature, the higher the internal pressure; the formation system, the liquid flux, The compaction density of the electrode plate affects the internal pressure of the battery. The stable internal pressure of the gas in the battery is accurately extracted from different SOC on line, and the relationship between P stability and SOC in the initial state of the battery at different temperatures is established. The results show that the relationship curve between them is consistent with the P-C-T curve of the alloy. The performance of D type battery with different times of 1C cycle at room temperature and 60 鈩，

本文編號：2038602