MONITORING CHARGE STORED IN A BATTERY,申请号WO2014EP62858-传众专利搜索

MONITORING CHARGE STORED IN A BATTERY

申请公布号：WO2014202684(A3)

申请号：WO2014EP62858

申请日期：2014.06.18

申请公布日期：2015.02.19

申请人：

VLAAMSE INSTELLING VOOR TECHNOLOGISCH ONDERZOEK NV (VITO NV)

发明人：COENEN, PETER

分类号：G01R31/36;B60L11/18

主分类号：G01R31/36

摘要：The present invention relates to a method and a corresponding device, for monitoring a charge of a battery. The method comprises obtaining (12) a battery current measurement value (IL) and a battery voltage measurement value (VL), and applying (14) a current integration method to update a primary charge estimate value representative of the charge stored in the battery by taking into account the battery current measurement value (IL). The method further comprises determining (16) an ancillary charge estimate value representative of the charge stored in the battery using a battery model taking into account the battery voltage measurement value (VL), and determining (18) an error value for said ancillary charge estimate value, in which the error value expresses the reliability of the battery model taking the battery voltage measurement value (VL) into account. The method also comprises applying (20) a correction to the primary charge estimate value as function of the ancillary charge estimate value and the error value. Interpretation of the correction applied in this manner allows determination of current sensor offset and battery capacity change.