Patent ID: 11929523
Assignee: SION POWER CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 15:
16. A method, comprising:
at least partially charging and/or discharging electrochemical cells at least partially enclosed by a housing of a battery to an extent such that the electrochemical cells undergo an expansion during the charging and/or discharging causing a cumulative expansion, the cumulative expansion being the percentage difference between the sum of thicknesses of the electrochemical cells prior to the expansion and the sum of the thicknesses of the electrochemical cells after the expansion;
applying, during a first period of time during the charging and/or discharging and the expansion of the electrochemical cells, a first anisotropic force with a component normal to an electrode active surface of at least one of the electrochemical cells defining a pressure having a first magnitude of at least 10 kgf/cm2; and
applying, during a second period of time during the charging and/or discharging and the expansion of the electrochemical cells, a second anisotropic force with a component normal to the electrode active surface of the at least one of the electrochemical cells defining a pressure having a second magnitude that is greater than the first magnitude by a factor of at least 1.2;
wherein:
a ratio of the cumulative expansion of the electrochemical cells to an expansion of the battery is greater than or equal to the total number of electrochemical cells in the battery; and
the battery has a volumetric energy density of greater than or equal to 230 Wh/L.