A battery module provided with a memory unit that stores identification information of the battery module, a motor module provided with a memory unit that stores identification information of the motor module, a battery control unit that controls the battery module, a motor control unit that controls the motor module, and a control module provided with the battery control unit and the motor control unit in a single module are provided. The battery control unit and the motor control unit respectively read the identification information of the modules and further load parameters for the battery module and the motor module corresponding to the identification information in response to activation of the control module.
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