Battery management apparatus

A battery management apparatus is provided. The battery management apparatus is used for increasing the capability of controlling the quality of battery modules and increasing the system integration. The battery management apparatus includes an interchangeable battery module and a battery pack management unit. The interchangeable battery module includes a battery management unit, a relay and a battery cell package. The battery management unit includes a voltage measurement circuit and a memory circuit. The voltage measurement circuit and the memory circuit are insulated from each other. The relay is used for switching an internal circuit of the interchangeable battery module. The battery cell package is connected with the battery management unit, and serves as a power source of the battery management apparatus. The battery pack management unit is connected with the voltage measurement circuit of the interchangeable battery module. The voltage measurement circuit is powered by the battery cell package. The voltage measurement circuit issues voltage information to the battery pack management unit. A battery operation data is stored in the memory circuit. The memory circuit is only accessible by the battery pack management unit through a memory input/output connector.