IEC 62391-2:20 25适用于电力应用的双电层电容器。 电力用双电层电容器适用于要求放电电流在mA至A范围内的应用。电容器的特性包括诸如相对高的电容和低的内阻的性能，其适用于IEC 62391-1:20 22中规定的测量分类的类别3和类别5。 本文件的目的是规定首选的额定值和特性，从IEC 62391-1:20 22中选择适当的质量评估程序、测试和测量方法，并给出此类电容器的一般性能要求。参考本文件的详细规范中规定的测试严重性和要求提供了同等或更高性能水平的特定测试严重性和要求。功率密度的定义及其计算程序见附录A。 与上一版相比，此版本包括以下重大技术变更: a)该文件已完全重组，以符合ISO/IEC指令第2部分； b)为测试方法引入新的技术分类； c)根据这些新的类别对测试方法进行了重组； d)根据变化对表格、图表和参考文献进行修订。

IEC 62391-2:2025 applies to electric double-layer capacitors for power application.
Electric double-layer capacitors for power are intended for applications that require discharge currents in the range from mA to A. The characteristics of the capacitors include such performance as relatively high capacitance and low internal resistance, which is applicable to Class 3 and Class 5 of the measurement classification specified in IEC 62391-1:2022.
The object of this document is to specify preferred ratings and characteristics and to select from IEC 62391-1:2022 the appropriate quality assessment procedures, tests and measuring methods and to give general performance requirements for this type of capacitor. Test severities and requirements specified in detail specifications referring to this document provide specific test severities and requirements of an equal or higher performance level.
The definition of power density and its calculating procedure can be found in Annex A.
This edition includes the following significant technical changes with respect to the previous edition:
a) the document has been completely restructured to comply with the ISO/IEC Directives, Part 2;
b) introduction of a new technical categorization for the test methods;
c) reorganization of the test methods have been according to these new categories;
d) revision of the tables, figures and references according to changes.