Detailed Explanation of Newest IEC Standard Resolutions,
IEC Standard Resolutions,

▍What is PSE Certification?

PSE (Product Safety of Electrical Appliance & Material) is a mandatory certification system in Japan. It is also called ‘Compliance Inspection’ which it is a mandatory market access system for electrical appliance. PSE certification is composed of two parts: EMC and product safety and it is also an important regulation of Japan safety law for electrical appliance.

▍Certification Standard for lithium batteries

Interpretation for METI Ordinance for Technical Requirements(H25.07.01)， Appendix 9，Lithium ion secondary batteries

▍Why MCM?

● Qualified facilities: MCM is equipped with qualified facilities which can be up to the whole PSE testing standards and conduct tests including forced internal short circuit etc. It enables us to provide different customized testing reports in the format of JET, TUVRH, and MCM etc.

● Technical support: MCM has a professional team of 11 technical engineers specialized in PSE testing standards and regulations, and is able to offer the latest PSE regulations and news to clients in a precise, comprehensive and prompt way.

● Diversified service: MCM can issue reports in English or Japanese to meet clients’ need. So far, MCM has completed over 5000 PSE projects for clients in total.

Recently International Electrotechnical Commission EE has approved, released and canceled several CTL resolutions on batteries, which mainly involves portable battery certification standard IEC 62133-2, energy storage battery certificate standard IEC 62619 and IEC 63056. The following is the specific content of the resolution:
IEC 62133:2017，IEC 62133:2017 +AMD1:2021：cancel the battery 60Vdc limit voltage requirement .In December 2022, CTL issued a resolution that the voltage of the battery pack products cannot exceed 60Vdc. There is no clear statement about voltage limit in IEC 62133-2, but it refers to the IEC 61960-3 standard.
The reason why this resolution was cancelled by CTL is that “the upper voltage limit of 60Vdc will restrict some industry products from undergoing this standard test, such as power tools, etc.” Similarly, in the interim resolution issued in December last year, it was proposed that when charging at the method of Article 7.1.2 (requiring charging at the upper and lower charging temperature limits), although in Appendix A.4 of the standard it states that when the upper/lower charging temperature is not 10℃/45℃, the expected upper charging temperature needs to be +5℃ and the lower charging temperature needs to -5℃. However, during the actual test, the +/-5°C operation can be omitted and charging can be carried out according to the normal upper/lower limit charging temperature.
This resolution was passed at this year’s CTL plenary meeting.
Now most battery manufacturers purchase BMS from the third parties, which may result in battery manufacturer not being able to understand the detailed BMS design. When the testing agent conducts functional safety assessment through Annex H of IEC 60730-1, the manufacturer cannot provide the source code of the BMS.