Battery system diagnostics using electrochemical impedance spectroscopy
AssigneeCaterpillar Inc.
InventorsWellington Y. Kwok, Jinhui Sun, Jeffrey Abney
Life of this patent
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Abstract
A detection system for a battery pack may include one or more monitoring devices configured to detect respective response signals, responsive to an EIS input signal applied to terminals of the battery pack, for a plurality of battery cells electrically connected to the terminals. The detection system may include a controller configured to transmit, to an EIS device, data indicating the respective response signals and identifying which of the plurality of battery cells generated the respective response signals.
Claims20
A method, comprising:
- receiving, by a battery pack, an electrochemical impedance spectroscopy (EIS) input signal applied at terminals of the battery pack,
- the terminals having an electrical connection to a plurality of battery cells of the battery pack;
- detecting, by one or more monitoring devices of the battery pack, respective response signals, responsive to the EIS input signal, of the plurality of battery cells;
- communicating, from the one or more monitoring devices to a controller of the battery pack, data indicating the respective response signals and identifying which of the plurality of battery cells generated the respective response signals;
- and
- transmitting, by the controller, the data to an EIS device.
A battery pack, comprising:
- a housing;
- a plurality of battery cells contained in the housing;
- terminals electrically connected to the plurality of battery cells,
- the terminals accessible from an exterior of the housing;
- one or more monitoring devices configured to:
- detect, while the battery pack is in an assembled state, respective response signals, responsive to an electrochemical impedance spectroscopy (EIS) input signal applied to the terminals, for the plurality of battery cells;
- and
- a controller configured to:
- receive, from the one or more monitoring devices, data indicating the respective response signals and identifying which of the plurality of battery cells generated the respective response signals;
- and
- transmit the data to an EIS device.
A detection system for a battery pack, comprising:
- one or more monitoring devices configured to:
- detect respective response signals, responsive to an electrochemical impedance spectroscopy (EIS) input signal applied to terminals of the battery pack, for a plurality of battery cells electrically connected to the terminals;
- and
- a controller configured to:
- transmit, to an EIS device, data indicating the respective response signals and identifying which of the plurality of battery cells generated the respective response signals.
Dependencies are inferred from the claim text.