IEC 62391-1:20 22适用于主要用于电气电子设备直流电路的固定双电层电容器（以下简称电容器）。 IEC 62391的这一部分建立了用于质量评估或任何其他目的的电子元件的分段和详细规范中的标准术语、检查程序和测试方法。 与上一版相比，此版本包括以下重大技术变更: 该文件已完全重组，以符合ISO/IEC指令第2部分；引入了测试方法的新技术分类，并根据这些新类别对测试方法进行了重组；表、图和参考文献已作相应修订。 附录D中的充放电效率计算公式分为两种情况:“假设完全充放电的计算”和“由于内阻而假设不完全充放电的计算”。

IEC 62391-1:2022 applies to fixed electric double-layer capacitors (hereafter referred to as capacitors) mainly used in DC circuits of electric and electronic equipment.
This part of IEC 62391 establishes standard terms, inspection procedures and methods of test for use in sectional and detail specifications of electronic components for quality assessment or any other purpose.
This edition includes the following significant technical changes with respect to the previous edition:

1. The document has been completely restructured to comply with the ISO/IEC Directives, Part 2; a new technical categorization of test methods has been introduced and the test methods have been reorganized according to these new categories; tables, figures and references have been revised accordingly.
2. Calculation formula of charging/discharging efficiency in Annex D were divided into two cases: "Calculation assuming full charge and discharge" and "Calculation assuming incomplete charging and discharging due to internal resistance".