Battery analysis via electrochemical impedance spectroscopy apparatus (eisa) measurements
AssigneeBloom Energy Corporation
InventorsArne BALLANTINE, John CRONIN, Joseph BODKIN
Life of this patent
Estimating the term…
Abstract
Electrochemical impedance spectroscopy (EIS) may be used to measure the internal components of a battery or interfaces between connections inside a battery in order to determine a state of one or more subcomponents of the battery. In various embodiments, EIS testing of the battery may be conducted using various test waveforms, such as test waveforms with different voltages, currents, and/or frequencies, to identify and/or predict battery subcomponent and/or interface failures. In various embodiments, EIS testing of the battery may be used to determine when battery conditions are suitable for charging.
Claims14
An electrochemical impedance spectroscopy analyzer (“EISA”) system, comprising:
- an electrochemical impedance spectroscopy (“EIS”) system connected to a battery;
- and
- a battery testing system connected to the EIS system, the battery testing system comprising:
- a battery component testing module;
- a battery study database storing one or more test waveforms each associated with a respective interface of the battery;
- and
- a recommendations database storing one or more waveforms correlated with one or more battery conditions and corresponding recommendations,
- wherein the battery component testing module is configured to:
- send a request to run an EIS test on the battery using at least one test waveform selected from the battery study database to the EIS system;
- receive a response waveform result from running the EIS test on the battery using the at least one test waveform;
- compare the response waveform to waveforms stored in the recommendations database to identify a matching waveform;
- determine whether the matching waveform indicates a normal battery condition;
- and
- display a recommendation correlated to the matching waveform from the recommendations database on a graphical user interface (“GUI”) of a battery-powered device connected to the battery in response to determining that the matching waveform does not indicate a normal battery condition.
A method for electrochemical impedance spectroscopy (“EIS”) testing of a battery, comprising:
- applying an EIS test waveform to an EIS system to the battery;
- receiving a response waveform result from the battery;
- comparing the response waveform to waveforms in a recommendations database to determine a matching waveform;
- determining whether the matching result indicates a normal battery condition;
- and
- displaying a recommendation correlated to the matching waveform from the recommendations database on a graphical user interface (“GUI”) of a battery-powered device connected to the battery in response to determining that the matching waveform does not indicate a normal battery condition.
Dependencies are inferred from the claim text.