Replacement determination device and replacement determination method of a storage battery

Control unit 16 of the replacement determination device charges one or more battery modules 10 to be determined, When the voltage measuring device 14 measures the voltage change value of a certain time from the time charge stop the battery module 10, the voltage change value becomes equal to or higher than the reference voltage change value of one or more predetermined number of times continuously, the battery module 10 It determines that there is a need to be replaced.