新能源汽车用薄膜电容环氧灌封材料的制备和应用

Preparation and application of epoxy potting materials for thin film capacitors in new energy vehicles

以双酚A型环氧树脂和双酚F型环氧树脂为主体树脂,氢氧化铝和球形硅微粉为填料,配合酸酐类固化剂和环氧增韧剂,制备了新能源汽车用薄膜电容环氧灌封材料,并分析了各组份对灌封材料性能的影响。结果表明:采用优化配方制备的新能源汽车用薄膜电容环氧灌封材料玻璃化转变温度高、力学性能好、粘接性能佳、线膨胀系数小、制作的电容器各项性能优异。所制备的灌封材料与国外同类灌封材料的各项性能水平相当,适用于新能源汽车用薄膜电容。

Using bisphenol A and bisphenol F epoxy resin as main resin,aluminum hydroxide and spherical silicon micro powder as fillers,combined with anhydride curing agent and epoxy toughening agent,a film capacitor epoxy potting material for new energy vehicle was prepared,and the effects of each component on the properties of potting materials were analyzed.The results show that the film capacitor epoxy potting material for new energy vehicles prepared by optimized formula has high glass transition temperature,good mechanical properties,good adhesion performance,small linear expansion coefficient,and the performances of capacitors are excellent.The prepared potting material has comparable performance levels to similar potting materials abroad and is suitable for thin film capacitors used in new energy vehicles.