Depth of discharge determination of alkaline batteries
AssigneeMedtronic, Inc.
InventorsMartin D. Donakowski, Kaimin Chen
Life of this patent
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Abstract
A method for determining a depth of discharge of an electrochemical cell includes (i)) providing one or more alkaline electrochemical cells comprising Ag2O—Zn; (ii) applying a varying voltage potential to the one or more alkaline electrochemical cells, (iii) measuring an output current response of the one or more alkaline electrochemical cells, the output current response comprising a phase response as a function of frequency; and (iv) determining a depth of discharge of the one or more alkaline electrochemical cells based on a linear relationship of the depth of discharge with the phase response.
Claims13
A method, comprising:
- providing one or more alkaline electrochemical cells comprising Ag2O—Zn;
- applying a varying voltage potential to the one or more alkaline electrochemical cells at a single frequency;
- measuring an output current response of the one or more alkaline electrochemical cells, the output current response comprising a phase response as a function of the single frequency;
- determining a linear relationship of a depth of discharge of the one or more alkaline electrochemical cells and the phase response as a function of the single frequency, the linear relationship based on one or more parameters of the alkaline electrochemical cell, the one or more parameters corresponding to one of a plurality of initial phase responses;
- and
- determining the depth of discharge of the one or more alkaline electrochemical cells based on the linear relationship.
A system, comprising:
- one or more alkaline electrochemical cells comprising Ag2O—Zn;
- a supply configured to provide a varying voltage potential to the one or more alkaline electrochemical cells at a single frequency;
- a detector configured to measure an output current response of the one or more alkaline electrochemical cells, the output current response comprising a phase response as a function of the single frequency;
- and
- an analyzer configured to:
- determine a linear relationship of a depth of discharge of the one or more alkaline electrochemical cells and the phase response as a function of the single frequency, the linear relationship based on one or more parameters of the alkaline electrochemical cell, the one or more parameters corresponding to one of a plurality of initial phase responses;
- and
- determine the depth of discharge of the one or more alkaline electrochemical cells based on the linear relationship.
A system, comprising:
- one or more alkaline electrochemical cells comprising Ag2O—Zn;
- a supply configured to provide a varying voltage potential to the one or more alkaline electrochemical cells at a single frequency;
- a detector configured to measure an output current response of the one or more alkaline electrochemical cells, the output current response comprising a phase response as a function of the single frequency;
- and
- an analyzer configured to:
- determine a linear relationship of a depth of discharge of the one or more alkaline electrochemical cells and the phase response as a function of the single frequency, the linear relationship based on one or more parameters of the alkaline electrochemical cell;
- determine the depth of discharge of the one or more alkaline electrochemical cells based on the linear relationship;
- and
- provide an offset to the linear relationship based on the one or more parameters.
Dependencies are inferred from the claim text.