BATTERY MODULE

The present disclosure provides a battery module that can properly suppress a high rate deterioration of a secondary battery and further that can maintain a charge efficiency equal to or more than a certain level. The herein disclosed battery module 1 includes a battery device 100 including a secondary battery 110 in which an electrode body and an electrolytic solution are accommodated inside a battery case, and includes a control device 200 that is configured to control a charge and discharge of the battery device 100. Then, the control device 200 includes an increase amount measurer 210 that is configured to measure an increase amount LΔ of an excess electrolytic solution of the secondary battery 110 for a charge, and includes a current value corrector 220 that is configured to perform a current correcting control in which a current value of a charge current is corrected with respect to the battery device 100 based on the increase amount LΔ of the excess electrolytic solution. By doing this, it is possible to continue the charge while the current value is corrected according to an extent of the high rate deterioration, and thus it is possible to properly suppress the high rate deterioration of the secondary battery so as to maintain the charge efficiency equal to or more than a certain level.