A control apparatus (2000) includes a control unit (2020). The control unit (2020) causes a charging apparatus (20) to perform charging of a lithium ion secondary battery (10), by controlling the charging apparatus (20). First, the control unit (2020) causes the charging apparatus (20) to perform the charging of the lithium ion secondary battery (10), until a voltage of the lithium ion secondary battery (10) becomes a predetermined voltage. Thereafter, the control unit (2020) causes the charging apparatus (2) to suspend the charging of the lithium ion secondary battery (10), until a predetermined time elapses. Therefore, the control unit (2020) causes the charging apparatus (20) to further perform the charging of the lithium ion secondary battery (10), after the suspending. The predetermined time is a time t [minute] that satisfies “t≥−A+B*x+C*y.” x[g/cm2] represents weight per unit area of a negative electrode of the lithium ion secondary battery (10). y [g/cm3] is density of the negative electrode. A is a constant that is equal to or more than 50 and equal to or less than 70. B is a constant that is equal to or more than 500 and equal to or less than 620. C is a constant that is equal to or more than 30 and equal to or less than 36.