Method and system for analyzing an electrical stored energy source and energy supply system

Abstract

In a method for analyzing an electrical energy storage device, in particular an accumulator or a battery, the energy storage device is electrically connected to at least one consumer and to at least one electrical energy source in an electrical energy supply system. An electrical energy flow into or out of the energy storage device is directly or indirectly measured using a measuring unit, in particular a smart meter, and at least one energy storage device parameter is iteratively determined on the basis of recorded values of the measured energy flow. The energy flow is expressed by the unit energy per time, and an energy profile of the energy flowing into the energy storage device and extracted from the energy storage device is identified from the energy flow by integrating the energy flow over time. The at least one parameter is determined on the basis of the energy profile.

1 . A method for analyzing an electrical energy storage device, in particular an accumulator or a battery, wherein the energy storage device is electrically connected to at least one consumer and to at least one electrical energy source in an electrical energy supply system, wherein an electrical energy flow into or out of the energy storage device is directly or indirectly measured using a measuring unit, in particular a smart meter, and at least one parameter of the energy storage device is iteratively determined on the basis of recorded values of the measured energy flow, wherein the energy flow is expressed by the unit energy per time, and an energy profile of the energy flowing into the energy storage device and extracted from the energy storage device is identified from the energy flow by integrating said energy flow over time, wherein the at least one parameter is determined on the basis of the energy profile. 
     
     
         2 . The method according to  claim 1 , wherein on the basis of the energy profile, a usable capacity of the energy storage device is determined as a parameter. 
     
     
         3 . The method according to  claim 1 , wherein on the basis of the energy profile, an energy currently contained in the energy storage device is determined as a parameter. 
     
     
         4 . The method according to  claim 3 , wherein on the basis of the energy currently contained in the energy storage device and the usable capacity of the energy storage device, a current state of charge of the energy storage device is determined as a parameter. 
     
     
         5 . The method according to  claim 1 , wherein on the basis of the energy profile, a current minimum available capacity, in particular a minimum available charging capacity or a minimum available discharging capacity, of the energy storage device is determined as a parameter. 
     
     
         6 . The method according to  claim 1 , wherein for measuring the energy flow in or out of the energy storage device, an electrical current into and out of the energy storage device and an electrical voltage at the energy storage device is measured. 
     
     
         7 . The method according to  claim 1 , wherein the at least one energy source feeds electrical energy into the energy storage device as a function of the at least one parameter. 
     
     
         8 . The method according to  claim 1 , wherein the at least one energy source is an electrical supply network, in particular an alternating current network, or a photovoltaic system. 
     
     
         9 . The method according to  claim 1 , wherein an energy flow into or out of the at least one energy source is measured and used, for example, to determine the at least one parameter of the energy storage device. 
     
     
         10 . An electrical system for analyzing an electrical energy storage device, comprising:
 at least one measuring unit, in particular a smart meter, for detecting an electrical energy flow into or out of an energy storage device, in particular an accumulator or a battery, wherein said measuring unit is configured to directly or indirectly measure the electrical energy flow into or out of the energy storage device;   an evaluation unit which is configured to iteratively determine at least one parameter of the energy storage device on the basis of recorded values of the measured energy flow, wherein the energy flow is expressed by the unit energy per time and the system is further configured to identify an energy profile of the energy flowing into the energy storage device and extracted from the energy storage device from the energy flow and to determine the at least one parameter on the basis of the energy profile.   
     
     
         11 . An energy supply system, comprising:
 at least one electrical consumer;   at least one electrical energy source;   at least one electrical energy storage device; and   the electrical analysis system according to  claim 10 , wherein the electrical consumer, the energy source, the energy storage device and the at least one measuring unit of the analysis system are electrically connected to one another and the measuring unit is configured to detect the energy flow into and/or out of the energy storage device.