| CPC G01R 31/387 (2019.01) [H02J 7/0019 (2013.01); H02J 7/0048 (2020.01); H02J 7/005 (2020.01); H02J 7/00712 (2020.01)] | 18 Claims |

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1. An energy storage system comprising:
a stack of battery modules;
a plurality of ultrasound emitter transducers, each ultrasound emitter transducer acoustically coupled to a surface of a respective one of the battery modules;
a plurality of ultrasound receiving transducers, each ultrasound receiving transducer acoustically coupled to a surface of a respective one of the battery modules;
one or more excitation modules electrically interfaced with the plurality of ultrasound emitter transducers;
one or more capture modules electrically interfaced with the plurality of ultrasound receiving transducers; and
an ultrasound battery management system controller configured to initiate battery module ultrasound interrogation sequences,
wherein the stack of battery modules is connected in series with a power exchange module, and the stack of battery modules is configured to be charged or discharged during the ultrasound interrogation sequences.
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