隨著汽車電氣化的加劇，汽車電路系統(tǒng)的電壓和輸出功率有了大幅度的提升，關(guān)鍵部件對電子元器件的耐壓耐沖擊能力要求更為嚴(yán)格。工作條件的變化對電子系統(tǒng)中的電容元器件的性能提出新的要求，從而拉動了汽車產(chǎn)業(yè)對薄膜電容器的需求。

　　With the intensification of automobile electrification, the voltage and output power of automotive circuit system have been greatly improved, and the key components have more stringent requirements on the withstand voltage and impact resistance of electronic components. The change of working conditions puts forward new requirements for the performance of capacitor components in electronic system, which drives the demand of film capacitor in automobile industry.

　　薄膜電容器是電動汽車驅(qū)動電路中的主要元件，主要起平滑的作用。逆變器將電池的直流電通過轉(zhuǎn)換器轉(zhuǎn)換成變動較小的電壓，再通過IGBT 開關(guān)元件轉(zhuǎn)換成近似于交流電的矩形波，由此產(chǎn)生的浪涌電壓很大，需要采用平滑電容器消除。

　　Thin film capacitor is the main component of electric vehicle drive circuit, which plays a smoothing role. The inverter converts the DC power of the battery into a relatively small voltage through a converter, and then converts it into a rectangular wave similar to alternating current through IGBT switching elements. The surge voltage generated by this is very large and needs to be eliminated by using a smooth capacitor.

　　在新能源汽車電機驅(qū)動和控制電路中，需要的主要電子元器件是功率半導(dǎo)體器件IGBT 、控制IC 以及電容器，其中，IGBT 占大約2/3 的成本。

　　In the motor drive and control circuit of new energy vehicles, the main electronic components are power semiconductor device IGBT, control IC and capacitor, of which IGBT accounts for about 2 / 3 of the cost.

　　電機控制技術(shù)的核心就是需要高效電機控制的逆變器技術(shù)，高效電機控制的逆變器技術(shù)則需要一個功能強大的IGBT 模塊和一個與之匹配的直流支撐電容器。

　　The core of motor control technology is the inverter technology which needs high-efficiency motor control. The inverter technology of high-efficiency motor control needs a powerful IGBT module and a matching DC support capacitor.

　　電機控制器主回路示意圖

　　早期的平滑電容器曾采用鋁電解電容，但為了提高效率，電機驅(qū)動的最大電壓從500V 提高到了650V 后，鋁電解電容的耐壓不足，薄膜電容器成為主流。

　　Aluminum electrolytic capacitor was used in the early smooth capacitor, but in order to improve the efficiency, the maximum voltage driven by motor was increased from 500V to 650V, and the withstand voltage of aluminum electrolytic capacitor was insufficient, and thin film capacitor became the mainstream.

　　新能源汽車將原有的鋁電解電容器替換成為薄膜電容器。

　　New energy vehicles replace the original aluminum electrolytic capacitors with thin film capacitors.

　　一方面是因為薄膜電容的耐壓耐沖擊特性使它非常適合在新能源汽車的電氣環(huán)境下使用。

　　On the one hand, the film capacitor is very suitable for use in the electrical environment of new energy vehicles because of its voltage and impact resistance.

　　另一方面，在過去多年的發(fā)展中，薄膜電容器的體系和重量減少了3~4 倍，同時改進了金屬化的分割技術(shù)，從而極大的幫助了薄膜電容的發(fā)展。

　　On the other hand, in the past years of development, the system and weight of thin-film capacitors have been reduced by 3-4 times. At the same time, the segmentation technology of metallization has been improved, which greatly helps the development of thin-film capacitors.

　　在新能源汽車領(lǐng)域，現(xiàn)有的鋁電解電容器未來將部分被薄膜電容所取代。目前已有越來越多的公司用薄膜電容替代電解電容。同時，在DC/DC 、電機控制系統(tǒng)、電池管理系統(tǒng)等高壓電氣單元中，薄膜電容的使用量也會隨著新能源汽車的推廣和普及而上升。

　　In the field of new energy vehicles, the existing aluminum electrolytic capacitors will be partially replaced by thin film capacitors in the future. At present, more and more companies have replaced electrolytic capacitors with thin film capacitors. At the same time, in DC / DC, motor control system, battery management system and other high-voltage electrical units, the use of thin-film capacitors will also increase with the promotion and popularization of new energy vehicles.