Functional safety/PL level assessment certification for power tools
·One-stop solution for functional safety
On May 15, 2020, the German National Technical Safety Committee Center ZLS updated the EK9-BE-91 (V3) previously released on March 9. This revision further clarifies the requirements of GS certification for battery charging systems (BMS). In response to the functional safety requirements of the new version of the EK9 resolution, a one-stop functional safety solution is provided for power tool companies to help products pass smoothly into the international market!

Service Overview
On May 15, 2020, the German National Technical Safety Committee Center ZLS updated the EK9-BE-91 (V3) previously released on March 9.
This revision further clarifies the requirements of GS certification for battery charging systems (BMS).

Scope of application of the new resolution: battery-powered power tools, garden tools and other mechanical products marked with the GS mark under the Machinery Directive.

The new version of the EK9 resolution proposes the following for lithium battery-driven power tools, garden tools and other mechanical products:

"BMS must have the detection and protection functions for the three parameters of the battery cell (battery cell temperature, battery cell voltage, battery cell current), and the reliability performance level of these three key safety functions must meet PLr = c. The relevant hardware is evaluated according to EN ISO 13849-1, and the relevant software is evaluated according to Annex H of EN 60730-1, and the software level is required to reach Class B."

Service Content
In response to the functional safety requirements of the new version of the EK9 resolution, SGS provides a one-stop solution for functional safety/PL level assessment and certification for corporate power tool products, helping products to pass smoothly in the international market!

Evaluation items
Power system integrity Safety circuit diagnostic solution evaluation Safety control circuit safety related parameter evaluation
Software system capability Software architecture design Software module design
FMEA single fault failure analysis Software process evaluation Product test report
Environmental test report Software change management, configuration management and version management
Software verification test report evaluation, etc. System safety functions and performance levels meet the requirements of relevant clauses of IEC62841

Related standards (including but not limited to)
EC 60730:2011 ISO 13849 - 1:2015