Electrochemical cell characterisation
AssigneeCirrus Logic, Inc.
InventorsJohn P. Lesso, Ivan Perry
Life of this patent
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Abstract
Circuitry for determining one or more characteristics of an electrochemical cell comprising a first working electrode and a counter electrode, the circuitry comprising: drive circuitry configured to apply a first stimulus to the first working electrode; measurement circuitry configured to measure a first response at the first working electrode; and processing circuitry configured to: applying compensation to the first response to obtain a first corrected response of the electrochemical cell to the first stimulus; and determine a first characteristic of the one or more characteristics of the electrochemical cell based on the first corrected response, the first characteristic associated with the first working electrode.
Claims27
Circuitry for determining one or more characteristics of an electrochemical cell comprising a first working electrode and a counter electrode, the circuitry comprising:
- drive circuitry configured to apply a first stimulus to the first working electrode;
- measurement circuitry configured to measure a first response to the first stimulus at the first working electrode;
- and
- processing circuitry configured to:
- apply compensation to the first response to obtain a first corrected response of the electrochemical cell to the first stimulus;
- and
- determine a first characteristic of the one or more characteristics of the electrochemical cell based on the first corrected response, the first characteristic associated with the first working electrode;
- wherein applying compensation to the first response comprises subtracting the first stimulus from the first response.
A method of determining one or more characteristics of an electrochemical cell comprising a first working electrode and a counter electrode, the method comprising:
- applying, with drive circuitry, a first stimulus to the first working electrode;
- measuring, with measurement circuitry, a first response at the first working electrode;
- applying, with processing circuitry, compensation to the first response to obtain a first corrected response of the electrochemical cell to the first stimulus;
- determining, with the processing circuitry, a first characteristic of the one or more characteristics of the electrochemical cell based on the first corrected response, the first characteristic associated with the first working electrode;
- wherein applying compensation to the first response comprises subtracting the first stimulus from the first response.
Circuitry for determining one or more characteristics of an electrochemical cell comprising a first working electrode and a counter electrode, the circuitry comprising:
- drive circuitry configured to apply a first stimulus to the first working electrode;
- measurement circuitry configured to measure a first response to the first stimulus at the first working electrode;
- processing circuitry configured to:
- apply compensation to the first response to obtain a first corrected response of the electrochemical cell to the first stimulus;
- and
- determine a first characteristic of the one or more characteristics of the electrochemical cell based on the first corrected response, the first characteristic associated with the first working electrode,
- wherein the measurement circuitry comprises a first transimpedance amplifier, comprising:
- a first inverting input coupled to the first working electrode;
- a first non-inverting input configured to receive the first stimulus;
- and
- a first output configured to output the first response.
Circuitry for determining one or more characteristics of an electrochemical cell comprising a first working electrode and a counter electrode, the circuitry comprising:
- drive circuitry configured to apply a first stimulus to the first working electrode;
- measurement circuitry configured to measure a first response to the first stimulus at the first working electrode;
- and
- processing circuitry configured to:
- apply compensation to the first response to obtain a first corrected response of the electrochemical cell to the first stimulus;
- and
- determine a first characteristic of the one or more characteristics of the electrochemical cell based on the first corrected response, the first characteristic associated with the first working electrode,
- wherein the measurement circuitry comprises a current conveyer, comprising:
- a first input coupled to the first working electrode;
- a second input coupled configured to receive the first stimulus;
- and
- a first output configured to output the first response.
Circuitry for determining one or more characteristics of an electrochemical cell comprising a first working electrode and a counter electrode, the circuitry comprising:
- drive circuitry configured to apply a first stimulus to the first working electrode;
- measurement circuitry configured to measure a first response to the first stimulus at the first working electrode;
- and
- processing circuitry configured to:
- apply compensation to the first response to obtain a first corrected response of the electrochemical cell to the first stimulus;
- and
- determine a first characteristic of the one or more characteristics of the electrochemical cell based on the first corrected response, the first characteristic associated with the first working electrode,
- wherein the electrochemical cell comprises a second working electrode, wherein:
- the drive circuitry is configured to apply a second stimulus to the second working electrode;
- the measurement circuitry is configured to measure a second response at the second working electrode;
- and
- the processing circuitry is configured to:
- apply compensation to the second response to obtain a second corrected response of the electrochemical cell to the second stimulus;
- and
- determine a second characteristic of the one or more characteristic of the electrochemical cell based on the second corrected response, the second characteristic associated with the second working electrode.
Dependencies are inferred from the claim text.