A test bed for an electrical energy storage system for vehicles includes a test system for conducting electrical tests of the energy storage system, optionally at least one conditioning unit for the climate control of the energy storage system, at least one data collection and analysis system, and optionally at least one safety system. In order to be able to test energy storage systems in a manner approximating their use as closely as possible in that all real influences on the energy storage system, for example, a traction battery for electric or hybrid vehicles, can be simulated with the simultaneous interaction of thermal, electrical, and mechanical influencing factors without the need to conduct tests in a real-world environment, at least one actuator is additionally provided for the mechanical stimulation of the energy storage system.