Patent ID: 11921163
Assignee: VOLKSWAGEN AKTIENGESELLSCHAFT
Field: Computer technology (Electrical engineering)
Classification: CPC G  B | IPC B  G

Claim 20:
21. The system of claim 15, wherein a plurality of battery modules in a battery pack includes the battery module; wherein the battery pack is modeled by (a) a plurality of first GNNs with first nodes represented by battery cells and (b) a second GNN with a plurality of second GNN nodes represented by the plurality of battery modules, respectively; wherein the plurality of first GNNs include the GNN; the program of instructions is executable by the one or more computing processors to further perform:
collecting, from the battery pack,
a plurality of sets of cell-level raw sensor data from individual battery cells in the plurality of battery modules,
a plurality of sets of module-level raw sensor data from individual battery modules in the battery pack, and
a set of pack-level raw sensor data from the battery pack;

extracting
a plurality of sets of cell-level input battery features from the plurality of sets of cell-level raw sensor data,
a plurality of sets of module-level input battery features from the plurality of sets of module-level raw sensor data, and
a set of pack-level input battery features from the set of pack-level raw sensor data;

using
the plurality of sets of cell-level input battery features to update a plurality of sets of first node states in the plurality of first GNNs, and
the plurality of sets of module-level input battery features to update a set of second node states in the second GNN; and

generating,
based at least in part on individual first output states of individual first GNN nodes in the plurality of sets of first GNN nodes and individual second output states of individual second GNN nodes in the set of second GNN nodes, estimation of a plurality of battery SoH indicators for individual battery cells in the battery pack, individual battery modules in the battery pack, and the battery pack itself, wherein the individual first output states of individual first GNN nodes in the plurality of sets of first GNN nodes are determined based at least in part on the plurality of sets of first node states as updated; wherein individual second output states of individual second GNN nodes in the set of second GNN nodes are determined base at least in part on the set of second node states as updated.