140AVO02000 Quantum
碳化硅器件相對(duì)硅基器件具有更佳的工作性能。功率器件實(shí)現(xiàn)電壓、電流和頻率的轉(zhuǎn)換,是電動(dòng)汽車動(dòng)力系統(tǒng)中電能轉(zhuǎn)化和電路控制執(zhí)行的核心。新能源汽車電力轉(zhuǎn)換的主流方案采用硅基 IGBT,而 IGBT 受限于硅基材料性能,較難進(jìn)一步提升各項(xiàng)性能。隨著電驅(qū)動(dòng)系統(tǒng)功率密度的不斷提高,需要更的電力轉(zhuǎn)換效率和更高的工作溫度,這對(duì)功率器件提出了更高的要求。碳化硅功率器件在導(dǎo)通電阻、阻斷電壓和結(jié)電容方面的性能顯著優(yōu)于傳統(tǒng)硅基功率器件,能夠?qū)崿F(xiàn)更高的功率體積密度、更高的功率質(zhì)量密度、更高的開關(guān)頻率、更高的效率,并降低冷卻系統(tǒng)的復(fù)雜程度。對(duì)新能源汽車而言,在相同電壓情況下,碳化硅器件厚度更薄,尺寸更小,重量更輕,導(dǎo)通電阻更低,能量損失更小,使得新能源汽車實(shí)現(xiàn)更長(zhǎng)的續(xù)航里程、更短的充電時(shí)間、更高的電池電壓,是實(shí)現(xiàn) 800V 高壓平臺(tái)的關(guān)鍵技術(shù)路徑。
碳化硅器件在電機(jī)控制器、車載充電機(jī)、DC-DC、無線充電中廣泛應(yīng)用。越來越多的車型在電機(jī)控制器采用碳化硅方案,國(guó)外奧迪 e-tron GT、福特 Mach-E、特斯拉 Model S 等車型紛紛采用了碳化硅器件,國(guó)內(nèi)比亞迪漢 EV 旗艦車型是碳化硅器件在國(guó)內(nèi)上車,小鵬 G9、蔚來 ET7 也采用碳化硅電機(jī)控制器解決方案。碳化硅成為中車型電源解決方案,豐田推出的電動(dòng) SUV車型 bZ4X 上搭載了基于碳化硅的車載充電機(jī)和 DC-DC 轉(zhuǎn)換器,國(guó)內(nèi)欣銳科技在車載充電機(jī)市場(chǎng)應(yīng)用碳化硅,威邁斯、英博爾等企業(yè)也發(fā)布了基于碳化硅的車載充電機(jī)產(chǎn)品方案。
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