Some of the automotive regulations use the term ‘REESS’ for the tests of electric vehicles and electronic sub assemblies used on electric vehicles. UN ECE Regulation 10 defines REESS as follows:

“REESS” means the rechargeable energy storage system that provides electric energy for electric propulsion of the vehicle.

Battery Management System (BMS) and Battery Pack are the two main components of the REESS. 

As UNECE mentions on the document titled Terminology related to REESS a battery pack may be considered as a REESS if BMS is integrated.

EMC tests for ESAs in configuration other than ”REESS charging mode coupled to the power grid”

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