US 12,148,939 B2
Energy storage unit comprising a battery module and method for managing such an energy storage unit
Adrien Lassagne, Revel (FR); and Gilles Moreau, Grenoble (FR)
Assigned to VERKOR, Grenoble (FR)
Appl. No. 18/269,030
Filed by VERKOR, Grenoble (FR)
PCT Filed Dec. 15, 2021, PCT No. PCT/FR2021/052340
§ 371(c)(1), (2) Date Jun. 22, 2023,
PCT Pub. No. WO2022/136770, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 20/14022 (FR), filed on Dec. 23, 2020.
Prior Publication US 2024/0047801 A1, Feb. 8, 2024
Int. Cl. H02J 7/00 (2006.01); H01M 4/58 (2010.01); H01M 10/0525 (2010.01); H01M 10/44 (2006.01); H01M 50/204 (2021.01); H01M 4/02 (2006.01); H01M 10/42 (2006.01)
CPC H01M 50/204 (2021.01) [H01M 4/5825 (2013.01); H01M 10/0525 (2013.01); H01M 10/441 (2013.01); H01M 10/446 (2013.01); H01M 10/448 (2013.01); H01M 2004/028 (2013.01); H01M 2010/4271 (2013.01); H01M 2010/4278 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A battery module (10) comprising a module management system (11) and at least one battery cell (30) having a state of charge which is characterized at least by a cell voltage, said at least one battery cell (30) comprising at least one electrode consisting of at least one active material having an olivine-type structure corresponding to a formula LiFezY1-zPO4, where 0<z<1, and where Y is a chemical element chosen from the group comprising manganese, nickel and cobalt, said at least one active material having a first voltage tray characterized by a first voltage range (P11) corresponding to the electrochemical potentials of the iron atoms in a characteristic curve of this active material linking the specific capacitance to the electrical voltage, and a second voltage tray characterized by a second voltage range (P12) corresponding to the electrochemical potentials of the atoms Y in said characteristic curve, said at least one battery cell (30) being capable of occupying:
a first operating mode (Mod1) in which the battery cell (30) undergoes a discharge,
a second operating mode (Mod2) in which the battery cell (30) does not undergo a discharge,
the module management system (11) being configured to decide to place the battery cell (30) selectively in an operating mode chosen from among said first and second operating modes (Mod1, Mod2) depending if the cell voltage of said at least one battery cell (30) corresponds to a voltage comprised within the first voltage range (P11), or corresponds to a voltage comprised within the second voltage range (P12), and depending on the type of demand for energy.