Method and device for estimating a state of an energy storage system of a vehicle

A method of estimating a state of an energy storage system of a vehicle, wherein the method comprises:

• acquiring information about the energy storage system;
• analyzing the acquired information while taking into account specified boundary conditions;
• and
• estimating the state of the energy storage system without using directly or indirectly measured values of a capacitance, charge, voltage, current of the energy storage system or any combination thereof,
• wherein vehicle function data is recorded for acquiring the information about the energy storage system,
• wherein a function change comprising an occurrence, an absence, or a function restriction of at least one vehicle function is concluded or can be concluded from the vehicle function data, and
• wherein the vehicle function data comprise:
• data concerning a fulfilment/non-fulfilment of at least one vehicle function including data concerning at least one functional component or safety component, in particular data concerning operation of a radiator of an engine of the vehicle, internal lighting, external lighting, power steering, power braking, a gearbox, a clutch, an electric clutch, technical driving safety systems, ride stability control systems, or driving dynamics management-systems, or any combination thereof;
• data concerning switching off or switching on a combustion engine of the vehicle in a start-stop mode of the combustion engine;
• data concerning the fulfilment/non-fulfilment of at least one vehicle function including data concerning operation of at least one comfort component, in particular data concerning operation of an air conditioning system, heating, an audio/video entertainment system, a navigation system, or any combination thereof;
• or
• any combination thereof.