STATE AND PARAMETER ESTIMATOR COMPRISING AN INTEGRAL OR DIFFERENTIAL PORTION FOR ELECTRICAL ENERGY STORES

摘要

The invention relates to a device for determining state variables (x) and/or parameters (p) of a mathematical energy store model (3), especially a battery model, which describes the electrical properties of the energy store (1) based on different state variables (x) and parameters (p). The mathematical energy store model (3) comprises corrective equations by means of which the state variables (x) and/or parameters (p) are corrected and adjusted to the real behavior of the energy store (1). In order to adjust the energy store model (3) in a particularly rapid and precise manner, the error (dy) between a measured battery operational parameter (ymess) and the battery operational parameter (Ycorr) calculated by the energy store model (3), a differential portion (15) of the error (dy), and an integrated portion (16) of the error (dy) are calculated, the individual portions (14-16) are weighted with a respective weighting factor (K), and the weighted portions (17-21) are taken into account when correcting a state variable (x) and/or a parameter (p).