Device and method for determining a storage capacity of an electrical energy store
AssigneeRobert Bosch GmbH
InventorsChristian Schlasza, Siegfried Lehmann
Life of this patent
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Abstract
A device and method for determining the storage capacity of an electrical energy store, as for example a rechargeable battery, based on the phase of the complex impedance of the electrical energy store. The impedance of the electrical energy store is determined in that the energy store is loaded with a specified periodic load and the system response setting in as a result is ascertained. On the basis of the correlation between the phase of the complex impedance of the electrical energy store and the storage capacity of the electrical energy store, it is thereupon possible reliably and in a simple manner to ascertain the storage capacity of the electrical energy store.
Claims12
1-11. (canceled)
A device for determining a storage capacity of an electrical energy store, comprising:
- a loading device to load the electrical energy store with a periodic load signal;
- a measuring device to measure a system response of the electrical energy store to the loading with the periodic load signal;
- a computing device to ascertain a phase shift between the periodic load signal and the measured system response of the electrical energy store;
- and
- an evaluation device to determine the storage capacity of the electrical energy store by using the ascertained phase shift between the periodic load signal and the measured system response of the electrical energy store.
A method for determining a storage capacity of an electrical energy store, the method comprising:
- loading the electrical energy store with a periodic load signal;
- measuring a system response of the electrical energy store to the loading with the periodic load signal;
- ascertaining a phase shift between the periodic load signal and the measured system response of the electrical energy store;
- and
- determining the storage capacity of the electrical energy store by using the ascertained phase shift between the periodic load signal and the measured system response of the electrical energy store.
Dependencies are inferred from the claim text.