An apparatus for identifying a position of an abnormality occurred in a secondary battery system, the secondary battery system comprising a plurality of modules each accommodating two or more blocks, the blocks each being formed by connecting battery cells of two or more secondary batteries, the apparatus comprising: a voltage measurement unit configured to detect a respective voltage of the secondary batteries of each of the blocks on a block by block basis and to output the detected voltage as a respective block voltage value every unit time; an average block voltage calculation unit configured to calculate an average block voltage value (Va) of each module, based on the block voltage values provided from the voltage measurement unit every unit time, an information acquisition unit configured to acquire respective module information of each module, said module information including the average block voltage values (Va) of the respective module together with the block voltage values of each of their associated blocks, said information acquisition unit including a voltage comparator unit configured to compare the difference between each of said block voltage values and a calculated reference block voltage value (Vb) with a predetermined voltage threshold value (Vth), said voltage comparator unit further including: - a linear regression processing unit configured to perform linear regression processing of a relationship between a plurality of block voltage values and a plurality of average block voltage values (Va) accumulated in a fixed period and to obtain information of one regression line, and - a reference voltage acquisition unit configured to acquire said information of the regression line from said linear regression processing unit and to calculate the reference block voltage value (Vb) corresponding to each block voltage value every unit time; a report reception unit configured to receive a report of an abnormality occurred in the secondary batteries; and a module identification unit configured to identify, as a module having the abnormality, the module corresponding to the respective module information at a time of receiving the report by the report reception unit. a voltage measurement unit configured to detect a respective voltage of the secondary batteries of each of the blocks on a block by block basis and to output the detected voltage as a respective block voltage value every unit time; an average block voltage calculation unit configured to calculate an average block voltage value (Va) of each module, based on the block voltage values provided from the voltage measurement unit every unit time, an information acquisition unit configured to acquire respective module information of each module, said module information including the average block voltage values (Va) of the respective module together with the block voltage values of each of their associated blocks, said information acquisition unit including a voltage comparator unit configured to compare the difference between each of said block voltage values and a calculated reference block voltage value (Vb) with a predetermined voltage threshold value (Vth), said voltage comparator unit further including: - a linear regression processing unit configured to perform linear regression processing of a relationship between a plurality of block voltage values and a plurality of average block voltage values (Va) accumulated in a fixed period and to obtain information of one regression line, and - a reference voltage acquisition unit configured to acquire said information of the regression line from said linear regression processing unit and to calculate the reference block voltage value (Vb) corresponding to each block voltage value every unit time; - a linear regression processing unit configured to perform linear regression processing of a relationship between a plurality of block voltage values and a plurality of average block voltage values (Va) accumulated in a fixed period and to obtain information of one regression line, and - a reference voltage acquisition unit configured to acquire said information of the regression line from said linear regression processing unit and to calculate the reference block voltage value (Vb) corresponding to each block voltage value every unit time; a report reception unit configured to receive a report of an abnormality occurred in the secondary batteries; and a module identification unit configured to identify, as a module having the abnormality, the module corresponding to the respective module information at a time of receiving the report by the report reception unit.