US 12,214,696 B1
High speed control of motor current in a distributed inverter system
Samuel Sjöstrand, Gothenburg (SE); Katriine Koit, Gothenburg (SE); Aditya Pratap Singh, Gothenburg (SE); Torbjörn Thiringer, Gothenburg (SE); and Markus Ekström, Gothenburg (SE)
Assigned to Volvo Car Corporation, Gothenburg (SE)
Filed by Volvo Car Corporation, Gothenburg (SE)
Filed on Jul. 17, 2023, as Appl. No. 18/353,448.
Int. Cl. B60L 58/18 (2019.01); B60L 50/60 (2019.01)
CPC B60L 58/18 (2019.02) [B60L 50/60 (2019.02); B60L 2240/421 (2013.01); B60L 2240/423 (2013.01); B60L 2240/547 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a smartcell battery system that supplies power to an electric motor of an electric vehicle, the smartcell battery system comprising:
a plurality of battery cells arranged in three strings that provide respective phase currents of a three-phrase current used to drive the electric motor;
local controllers connected to defined clusters of the battery cells; and
a master controller;
at least one processor; and
at least one memory that stores executable instructions that, when executed by the at least one processor, facilitate performance of operations, comprising:
receiving, by the local controllers from the master controller, master control information determined by the master controller based on actual phase current values of the respective phase currents;
determining, by the local controllers, local control information based on the master control information and estimated phase current values for the respective phase currents; and
controlling, by the local controllers, current output by the battery cells to the electric motor in accordance with the master control information or the local control information based on whether a difference is observed between the master control information and the local control information.