Method and device for using an electrochemical energy store so as to optimize the service life
AssigneeSiemens Aktiengesellschaft
InventorsRafael Fink, Kurt Majewski, Martin Seydenschwanz
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Abstract
A method and a device for using an electrochemical energy store so as to optimize the service life is provided. The cyclical aging of the energy store is expressed in the form of a nonlinear function based on the temperature which can be influenced by a charging and/or discharging process of the energy store and the energy throughput. The nonlinear function is linearly approximated in order to determine the cyclical aging in each interval which can be specified for subdividing a specifiable usage planning period and is used to calculate a service life-optimizing plan for using the energy store.
Claims12
A method for using an electrochemical energy store so as to optimize a service life, wherein a cyclic aging of the energy store is expressed in a form of a non-linear function on a basis of a temperature, which is influenced by a charging and/or discharging process of the energy store, and an energy throughput, wherein the non-linear function for determining the cyclic aging is expressed by:
- g(P,T)=Aref*exp(M/Tref)*Δt*P*exp(−M/T),
- where Aref is a constant calculated by means of a quotient of procurement costs and the energy throughput until an end of the service life at a constant temperature Tref, M is a quotient of an activation energy and an universal gas constant in the law of Arrhenius, P is a power and T is the temperature, is linearly approximated by means of one or more planes in each of the time steps which are predefined for the purpose of subdividing a predefinable usage planning period and, by integrating a resulting model into a mixed integer optimization tool for complex applications, usage planning with optimized resource consumption for using the energy store so as to optimize the service life is calculated, wherein a solver is used as the optimization tool.
A device for using an electrochemical energy store so as to optimize a service life, wherein a cyclic aging of the energy store is expressed in a form of a non-linear function on a basis of a temperature, which is influenced by a charging and/or discharging process of the energy store, and the energy throughput, wherein the device is designed to linearly approximate the non-linear function for determining the cyclic aging, which is expressed by:
- g(P,T)=Aref*exp(M/Tref)*Δt*P*exp(−M/T),
- where Aref is a constant calculated by means of a quotient of procurement costs and an energy throughput until an end of the service life at a constant temperature Tref, M is a quotient of an activation energy and a universal gas constant in the law of Arrhenius, P is a power and T is the temperature, by means of one or more planes in each of the time steps which is predefined for the purpose of subdividing a predefinable usage planning period and, by integrating a resulting model into a mixed integer optimization tool for complex applications, to use the imxed integer optimization tool to calculate usage planning with optimized resource consumption for using the energy store so as to optimize the service life, wherein a solver is used as the optimization tool.
Dependencies are inferred from the claim text.