Electrical apparatus and verification method for battery module thereof

An electrical apparatus, comprising:

• a battery module, having a verification circuit and an identification resistor, wherein the identification resistor is coupled to a first reference voltage;
• and
• a battery verification module, having a reference resistor coupled to a second reference voltage and further comprising:
• a main processor, coupled to an end of the reference resistor that is not coupled to the second reference voltage;
• a first auxiliary processing module, coupled to the main processor;
• and
• a first voltage dividing resistor, coupled on a coupled path between the first auxiliary processing module and the main processor, wherein a resistance of the first voltage dividing resistor is smaller than a resistance of the reference resistor,
• wherein when the battery module is connected to the battery verification module, the reference resistor and the identification resistor are serially connected between the first reference voltage and the second reference voltage, the battery verification module obtains a type information of the battery module according to a voltage on a coupled point between the reference resistor and the identification resistor, the battery verification module transmits a verification request to the verification circuit to allow the verification circuit to transmit a verification signal to the battery verification module through a coupled path between the reference resistor and the identification resistor.