電動(dòng)汽車車載充電機(jī)系統(tǒng)設(shè)計(jì)
本文選題:鋰電池組 + 充電機(jī); 參考:《天津理工大學(xué)》2014年碩士論文
【摘要】:多年來,汽車行業(yè)帶來了環(huán)境污染、資源消耗等很難解決的問題,如果持續(xù)發(fā)展,可以想象其后果之嚴(yán)重。對(duì)此,國(guó)家致力于大力發(fā)展新能源的汽車,而純電動(dòng)汽車就是發(fā)展方向之一。純電動(dòng)汽車零排放、低消耗,符合當(dāng)代汽車行業(yè)發(fā)展的需求。電動(dòng)汽車的能量來源為動(dòng)力電池,本文選擇動(dòng)力電池中性能較優(yōu)越的鋰電池;鋰電池的能量來源有非車載充電機(jī)和車載充電機(jī)兩種。 本文以國(guó)家科技部863項(xiàng)目中的電動(dòng)汽車充電設(shè)備電氣檢測(cè)技術(shù)及標(biāo)準(zhǔn)研究為背景,針對(duì)目前所常見的車載充電設(shè)備對(duì)電能的損耗和充電標(biāo)準(zhǔn)未能規(guī)范化的問題,以提高充電機(jī)的充電性能為目的,設(shè)計(jì)了一款新型的車載充電機(jī)系統(tǒng)。 本文的控制對(duì)象是95節(jié)10Ah的鋰電池串聯(lián)而成的鋰電池組,充電方法為三段式充電。系統(tǒng)主電路的輸入為220V的交流市電,經(jīng)過AC-DC,DC-DC的電壓變換之后,主電路輸出0~400V可調(diào)的直流電壓。DC-DC變換器采用ZVS軟開關(guān)控制,提高了系統(tǒng)的轉(zhuǎn)換效率?刂齐娐肥且訢SPTMS320F812為控制器的電流環(huán)和電壓環(huán),實(shí)現(xiàn)主電路輸出電壓和電流的可調(diào)。在整個(gè)充電過程中,電池管理系統(tǒng)(BMS)對(duì)鋰電池組的充電參數(shù)進(jìn)行采樣,判斷鋰電池組所處的充電階段,進(jìn)而通過CAN通信控制充電機(jī)主電路輸出電壓和電流的大小,最終確保了充電期間的控制精度,也保證了系統(tǒng)的安全性。在確定了系統(tǒng)主控電路的拓?fù)浣Y(jié)構(gòu)之后,首先完成了對(duì)系統(tǒng)主控電路中元器件參數(shù)值的計(jì)算,然后通過MATLAB仿真分析,驗(yàn)證了主控電路的正確性、同時(shí)也確定了各元器件的選型,進(jìn)而完成了基于DSP TMS320F2812的軟硬件設(shè)計(jì)。最終完成了車載充電機(jī)系統(tǒng)的設(shè)計(jì),且在轉(zhuǎn)換效率和控制精度等方面達(dá)到了高性能指標(biāo)。
[Abstract]:Over the years, the automobile industry has brought environmental pollution, resource consumption and other difficult problems, if sustainable development, we can imagine the consequences of serious. In this regard, the country is committed to the development of new energy vehicles, and pure electric vehicles is one of the development direction. Pure electric vehicle zero emission, low consumption, in line with the development of the contemporary automotive industry needs. The energy source of the electric vehicle is the power battery. In this paper, the lithium battery with superior performance is chosen, and the energy source of the lithium battery is the non-vehicle charger and the on-board charger. Based on the research of electric testing technology and standard of electric vehicle charging equipment in the 863 project of the Ministry of Science and Technology, this paper aims at the problem that the current commonly used on-board charging equipment can not standardize the loss of electric energy and the standard of charging. In order to improve the charging performance of the charger, a new type of onboard charger system is designed. The control object of this paper is 95 10Ah lithium battery in series, the charging method is three-stage charging. The input of the main circuit of the system is 220 V AC, and after the voltage conversion of AC-DCU DC-DC, the output of the main circuit can be adjusted by ZVS soft switch control, which improves the conversion efficiency of the system. The control circuit is a current loop and a voltage loop with DSP TMS320F812 as the controller to realize the adjustable output voltage and current of the main circuit. During the whole charging process, the battery management system (BMS) sampled the charging parameters of the lithium battery pack, judged the charging stage of the lithium battery pack, and then controlled the output voltage and current of the main circuit of the charging machine through can communication. Finally, the control accuracy during the charging period is ensured, and the security of the system is also guaranteed. After determining the topological structure of the main control circuit of the system, the calculation of the parameters of the components in the main control circuit of the system is completed, and then the correctness of the main control circuit is verified by MATLAB simulation, and the selection of the components is also determined. Furthermore, the hardware and software design based on DSP TMS320F2812 is completed. Finally, the design of on-board charger system is finished, and the high performance index is achieved in conversion efficiency and control precision.
【學(xué)位授予單位】:天津理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:U469.72;TM910.6
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