Charging device and charging method for an electrical energy store
AssigneeRobert Bosch GmbH
InventorsSeifeldin Tarek Mohamed Shaaban, Tahir Harman
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Abstract
The invention discloses a concept for charging an electrical energy store, for example a traction battery in an electric vehicle. For this purpose, superimposing an AC voltage at a predetermined amplitude and frequency on a DC voltage which is intended for charging the electrical energy store is proposed. The AC voltage can be adjusted according to the properties of the electrical energy store to be charged with respect to the impedance of the electrical energy store.
Claims10
A charging device (1) for an electrical energy store (2), the charging device (1) comprising:
- an input port (11) configured to be connected to a DC voltage source (3);
- an output port (12) configured to be connected to the electrical energy store (2);
- and
- a superimposition means (13) configured to superimpose a predetermined AC voltage on a DC voltage supplied at the input port (11) and to provide the DC voltage that has been superimposed with the AC voltage on the output port (12),
- wherein the predetermined AC voltage has a specified frequency and a specified amplitude.
A charging method for an electrical energy store (2), the method comprising:
- providing (S1) an electrical DC voltage;
- superimposing (S2) a predetermined AC voltage on a supplied electrical DC voltage, wherein the predetermined AC voltage has a specified frequency and an specified amplitude;
- and
- providing (S3) the electrical DC voltage with the superimposed AC voltage at the electrical energy store (2).
Dependencies are inferred from the claim text.