Method and device for determining the charge of a battery
First Claim
1. A method for determining a state-of-charge of a battery, comprising the steps ofevaluating a transition frequency of an impedance for a battery, which is excited by an alternating current, and assigning the transition frequency to the state-of-charge of the battery wherein the transition frequency is a frequency of the alternating current at which the imaginary part of the impedance of the battery vanishes.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and device for determining the charge of a battery, characterized in that a gain crossover frequency (f±) for an impedance of the battery excited by an alternating current signal is established, and the gain crossover frequency (f±) is assigned to the charge of the battery, whereby the gain crossover frequency (f±) is a frequency of the alternating current signal at which an imaginary portion of the impedance of the battery vanishes.
16 Citations
28 Claims
-
1. A method for determining a state-of-charge of a battery, comprising the steps of
evaluating a transition frequency of an impedance for a battery, which is excited by an alternating current, and assigning the transition frequency to the state-of-charge of the battery wherein the transition frequency is a frequency of the alternating current at which the imaginary part of the impedance of the battery vanishes.
- 14. A device for determining a state-of-charge of a battery, comprising an element for determining a transition frequency of an impedance of a battery, which is excited by an alternating current, and a calculation unit for assigning the transition frequency to the state-of-charge of the battery, where the transition frequency is a frequency of the alternating current at which the imaginary part of the impedance of the battery vanishes.
Specification